CN111698935B - Cleaning sheet and method for continuously producing material for cleaning sheet - Google Patents
Cleaning sheet and method for continuously producing material for cleaning sheet Download PDFInfo
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- CN111698935B CN111698935B CN201980012431.0A CN201980012431A CN111698935B CN 111698935 B CN111698935 B CN 111698935B CN 201980012431 A CN201980012431 A CN 201980012431A CN 111698935 B CN111698935 B CN 111698935B
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
- A47L13/16—Cloths; Pads; Sponges
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
- A47L13/16—Cloths; Pads; Sponges
- A47L13/17—Cloths; Pads; Sponges containing cleaning agents
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H13/00—Other non-woven fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
Abstract
The invention aims to provide a cleaning sheet capable of collecting small garbage and catching large garbage. The cleaning sheet of the present invention has the following configuration. In a cleaning sheet (1) composed of non-woven fabric, the cleaning sheet (1) has a direction (D) toward a1 st direction in a Cleaning Region (CR) 1 ) One direction (D) of 11 ) A plurality of 1 st flap parts (11) protruding and facing the 1 st direction (D) 1 ) In another direction (D) 12 ) And a plurality of 2 nd flap portions (21) that protrude, the plurality of 1 st flap portions (11) and the plurality of 2 nd flap portions (21) being respectively constituted by one ends (13, 23) and the other ends (15, 25), fixed end portions (17, 27), and free end portions (19, 29) that are convexly curved in a direction away from the fixed end portions (17, 27), each of the plurality of 1 st flap portions (11) being disposed adjacent to each of the plurality of 2 nd flap portions (21).
Description
Technical Field
The present invention relates to a cleaning sheet and a method for continuously producing a material for a cleaning sheet.
Background
Cleaning sheets for cleaning dust, dirt, and the like present on a surface to be cleaned are known, and various improvements have been made in view of improving cleaning performance and the like.
For example, patent document 1 describes a cleaning sheet having the following characteristics: the cleaning sheet is composed of a sheet structure forming a cleaning part, wherein the sheet structure is provided with a sheet material, the sheet material is provided with a cutting seam group formed by forming a plurality of cutting seams on a sheet raw material in a preset pattern, the sheet material is stretched in a direction crossed with the thickness direction of the sheet raw material to widen the plurality of cutting seams forming at least one part of the cutting seam group, so as to form a plurality of slit holes, and the slit holes of at least one part of the sheet material are positioned on the cleaning part.
Prior art documents
Patent document
Patent document 1: japanese patent laid-open publication No. 2013-27682
Disclosure of Invention
Problems to be solved by the invention
In the cleaning sheet described in patent document 1, the slit group is provided to elongate the cleaning sheet in a direction intersecting the thickness direction of the cleaning sheet, and the slit group does not directly contribute to the cleaning performance of the cleaning sheet.
Accordingly, the 1 st object of the present invention is to provide a cleaning sheet capable of collecting small garbage and catching large garbage.
The inventors of the present application have found that dust and the like can be captured by forming a flap portion protruding in the opposite direction on the cleaning sheet and folding back the flap portion in the direction opposite to the direction in which the cleaning sheet moves during cleaning, but have also found that the flap portion protruding in the opposite direction is folded back during the production of the cleaning sheet and causes a defect in the produced cleaning sheet.
In the cleaning sheet described in patent document 1, for example, when the slit hole shown in fig. 9 is provided, when the cleaning sheet is continuously produced, particularly at a high speed, the sheet is blown by wind and the sheet is wound up at the slit hole, and there is a possibility that the produced cleaning sheet has a defect.
Accordingly, a2 nd object of the present invention is to provide a method for continuously producing a cleaning sheet material including a flap portion which is difficult to fold back at the time of production and is easy to fold back at the time of use and protrudes in one direction and the other direction of the 1 st direction.
Means for solving the problems
With respect to the 1 st object, the present inventors have found a cleaning sheet comprising a nonwoven fabric and having a1 st direction, a2 nd direction, a thickness direction and a cleaning region which are orthogonal to each other, wherein the cleaning sheet comprises a plurality of 1 st flap parts protruding in one direction of the 1 st direction and a plurality of 2 nd flap parts protruding in the other direction of the 1 st direction in the cleaning region, the plurality of 1 st flap parts and the plurality of 2 nd flap parts each comprise one end and the other end, a free end part and a fixed end part connecting the one end and the other end, the free end part is convexly bent in a direction away from the fixed end part with the one end and the other end as starting points, and each of the 1 st flap parts of the plurality of 1 st flap parts is disposed adjacent to each of the 2 nd flap parts of the plurality of 2 nd flap parts.
With respect to the 2 nd object, the present inventors have found a method for continuously manufacturing a material for a cleaning sheet, wherein the method comprises: a flap portion forming step of forming, for each of the material regions, a plurality of 1 st flap portions that protrude in one direction orthogonal to the conveyance direction and do not protrude in the conveyance direction, and a plurality of 2 nd flap portions that protrude in the other direction orthogonal to the orthogonal direction and do not protrude in the conveyance direction, while conveying a belt-shaped nonwoven fabric having a plurality of material regions that constitute the cleaning sheet material in the conveyance direction; and a cleaning sheet material forming step of cutting the belt-shaped nonwoven fabric having passed through the flap portion forming step in the plurality of material regions, respectively, to form a plurality of cleaning sheet materials, each of the cleaning sheet materials having a1 st direction, a2 nd direction, and a thickness direction orthogonal to each other, and including a plurality of 1 st flap portions protruding in one direction of the 1 st direction corresponding to the one direction of the orthogonal direction and not protruding in one direction of the 2 nd direction corresponding to the conveyance direction, and a plurality of 2 nd flap portions protruding in the other direction of the 1 st direction corresponding to the other direction of the orthogonal direction and not protruding in one direction of the 2 nd direction corresponding to the conveyance direction.
ADVANTAGEOUS EFFECTS OF INVENTION
With respect to the 1 st object, the cleaning sheet of the present invention can collect small garbage and can catch large garbage.
With respect to the 2 nd object, the method for continuously manufacturing a material for a cleaning sheet of the present invention can continuously manufacture a material for a cleaning sheet, which is provided with a flap portion that is difficult to fold at the time of manufacturing and is easy to fold at the time of use and protrudes in one direction and the other direction of the 1 st direction.
Drawings
Fig. 1 is a front view of a cleaning sheet 1 according to embodiment a 1.
Fig. 2 is a rear view of the cleaning sheet 1.
Fig. 3 is an enlarged perspective view of a region III of fig. 1.
Fig. 4 is a view for explaining the reciprocating motion of the 1 st flap part 11 and the 2 nd flap part 21, and corresponds to an enlarged perspective view of the region III in fig. 1.
Fig. 5 is a view for explaining the cleaning sheet 1 after cleaning the surface to be cleaned.
Fig. 6 is a diagram for explaining a state in which the cleaning sheet 1 is attached to the cleaning tool 101.
Fig. 7 is a front view of a multilayer cleaning sheet 51 according to embodiment a 2.
Fig. 8 is a rear view of multilayer cleaning sheet 51.
Fig. 9 is a cross-sectional view of the multilayer cleaning sheet 51 taken along line IX-IX in fig. 7.
Fig. 10 is an enlarged perspective view of the region X of fig. 9.
Fig. 11 is a diagram for explaining a movable region of the flap portion.
Fig. 12 is a view for explaining an example of a flap part in the cleaning sheet of the present invention.
Fig. 13 is a view for explaining a manufacturing method according to the embodiment B1.
Fig. 14 is a view for explaining a manufacturing method according to the embodiment B1.
Fig. 15 is an enlarged view of a region III of fig. 14.
Fig. 16 is a view for explaining an example of a flap part in a cleaning sheet material formed by the manufacturing method of the present invention.
Detailed Description
[ definition ]
< embodiment A set >
"area" of the flap part "
In the present specification, the area of each flap portion (the "1 st flap portion and/or the 2 nd flap portion" may be simply referred to as "flap portion") is an area obtained by measuring a region defined by a free end portion and a fixed end portion constituting the flap portion from the thickness direction of the cleaning sheet.
"Movable area" of the flap "
In the present specification, the movable region of the flap portion (the "1 st movable region of the 1 st flap portion and the 2 nd movable region of the 2 nd flap portion" may be simply referred to as "movable region") refers to the largest region where the flap portion may exist when the flap portion is folded back one or more times so as to contact the remaining portion of the cleaning sheet at an arbitrary position.
Fig. 11 is a diagram for explaining a movable region of the flap portion, the flap portion 201 includes a structure including one end 203 and the other end 205, a fixed end portion 207 linearly connecting the one end 203 and the other end 205, and a free end portion 209 protruding in a direction away from the fixed end portion 207 with the one end 203 and the other end 205 as starting points, and the free end portion 209 includes a straight portion passing through the one end 203 and the farthest portion 211 and a straight portion passing through the other end 205 and the farthest portion 211.
In fig. 11, the flap portion 201a, the flap portion 201b, the flap portion 201c, and the flap portion 201d (when the fixed end portion 207 is folded back) are shown in a case where the flap portion 201 is folded back once at different positions, and the movable region 213 is defined by an arc 215 having a radius of a straight portion passing through the one end 203 and the farthest portion 211 as a center at the one end 203 and an arc 217 having a radius of a straight portion passing through the other end 205 and the farthest portion 211 as a center at the other end 205.
The flap part 201 shown in fig. 11 is for explaining the structure of the movable region of the flap part in the cleaning sheet of the present invention, and the flap part 201 itself shown in fig. 7 does not correspond to the flap part in the cleaning sheet of the present invention.
When the flap portion is the flap portion 301 having the free end portion 309 formed of the semicircular arc portion as shown in fig. 12 a, a movable region (not shown) of the flap portion 301 is defined by the free end portion 309 of the flap portion 301 and the free end portion 309 when the flap portion 301 is folded back at the fixed end portion 307.
The same applies to the movable region in the case where the flap portion is a flap portion having a free end portion formed of an arc portion less than the semicircular arc portion.
< mode B group >
"protrusion" in the transport direction of the flip part "
In the present specification, the fact that the flap portion "protrudes in the conveying direction" means that the flap portion has a free end portion disposed on the upstream side in the conveying direction than the free end portion between one end and the other end of the flap portion, and the fact that the flap portion does not "protrude in the conveying direction" means that the flap portion does not have a free end portion disposed on the upstream side in the conveying direction than the free end portion between one end and the other end of the flap portion.
In the present specification, the "flap portion" refers to the 1 st flap portion and/or the 2 nd flap portion, the "one end" refers to the 1 st end of the 1 st flap portion and/or the 2 nd end of the 2 nd flap portion, and the "other end" refers to the 1 st other end of the 1 st flap portion and/or the 2 nd other end of the 2 nd flap portion.
The "area" of the flap "
In the present specification, the area of the flap portion refers to an area obtained by measuring a region defined by the free end portion and the fixed end portion constituting the flap portion from the thickness direction of the cleaning sheet.
In the present specification, the "free end portion" refers to the 1 st free end portion of the 1 st flap portion and/or the 2 nd free end portion of the 2 nd flap portion, and the "fixed end portion" refers to the 1 st fixed end portion of the 1 st flap portion and/or the 2 nd fixed end portion of the 2 nd flap portion.
"Movable area" of the flap "
In the present specification, the movable region of the flap portion refers to the largest region where the flap portion can exist when the flap portion is folded back one or more times so as to contact the remaining portion of the cleaning sheet at an arbitrary position.
In the present specification, the "movable region" refers to the 1 st movable region of the 1 st flap and/or the 2 nd movable region of the 2 nd flap.
Since a specific example is the same as that of fig. 11 described in the group of mode a, description thereof will be omitted.
< embodiment A set >
Specifically, the present invention relates to the following embodiments a1 to a 6.
[ means A1]
A cleaning sheet comprising a nonwoven fabric and having a1 st direction, a2 nd direction, a thickness direction and a cleaning region which are orthogonal to each other,
the cleaning sheet is provided with a plurality of 1 st flap parts protruding in one direction of the 1 st direction and a plurality of 2 nd flap parts protruding in the other direction of the 1 st direction in the cleaning area,
the plurality of 1 st flap parts and the plurality of 2 nd flap parts are respectively composed of one end and the other end, a free end part and a fixed end part connecting the one end and the other end, the free end part is convexly bent in a direction away from the fixed end part by taking the one end and the other end as a starting point,
each of the 1 st flap portions is disposed adjacent to each of the 2 nd flap portions.
The cleaning sheet has a plurality of 1 st flap parts and a plurality of 2 nd flap parts having a predetermined configuration.
When the cleaning sheet is attached to a cleaning tool to clean a surface to be cleaned, if the cleaning sheet is moved in one direction of the 1 st direction, the 1 st flap part comes into contact with a portion having high friction (for example, a dirty portion), and if the 1 st flap part is folded back in the other direction with the 1 st surface as the inside (hereinafter, the "flap part is folded back in the other direction with the 1 st surface as the inside" may be simply referred to as "the flap part is folded back in the other direction"), the cleaning sheet is provided with a1 st opening at a portion thereof where the 1 st flap part is present, so that small garbage can be taken in from the 1 st opening to the inside (for example, between the cleaning sheet and a cleaning tool, or between the cleaning sheets folded when the cleaning sheet is folded for use) (hereinafter, the action of taking in small garbage from the opening by the flap part may be referred to as "small garbage taking-in action"). Further, since the above-described small garbage collecting effect is highest near the fixed end of the 1 st opening, the effect tends to be larger when the cleaning sheet is moved in one direction. In addition, small trash was also collected between fibers of the nonwoven fabric and removed.
Further, when reciprocating movement is performed in which the cleaning sheet is moved in one direction of the 1 st direction and the 1 st flap part is folded back in the other direction, and the cleaning sheet is moved in the other direction of the 1 st direction and the 1 st flap part is returned in the one direction, the 1 st flap part can catch large garbage (hereinafter, an action of catching large garbage by reciprocating the flap part is sometimes referred to as "large garbage catching action"). Further, since the cleaning sheet is thick, when the 1 st flap part is folded back in the other direction, that is, when the cleaning sheet is moved in one direction, the large dust trapping effect tends to be larger.
Further, when the cleaning sheet is used to clean the surface to be cleaned, dust such as hair and dust present on the surface to be cleaned is first caught by the peripheral portion of the cleaning sheet, and dust not caught by the peripheral portion of the cleaning sheet tends to move toward the central portion of the cleaning sheet. Therefore, when the amount of dust captured by the cleaning sheet increases, the amount of dust such as hair and dust captured at the peripheral edge of the cleaning sheet and dust existing on the surface to be cleaned tend to overlap each other, and a bar-shaped dust connecting body tends to be formed. The 1 st flap portion can continuously hold the connected dust body during the reciprocating movement (hereinafter, the action of continuously holding the connected dust body during the reciprocating movement of the flap portion may be referred to as a "connected dust body holding action"). Further, since the cleaning sheet is thick, the above-mentioned holding action of the connected garbage is liable to become greater when the 1 st flap part is folded back in the other direction, that is, when the cleaning sheet is moved in one direction.
Further, when the 1 st flap portion is folded back, that is, when the cleaning sheet is moved in one direction, the cleaning sheet has a concave-convex region including a convex region which is a region overlapping the folded-back 1 st flap portion in the thickness direction and a concave region which is a region overlapping the 1 st opening portion in the thickness direction, and therefore, the wiping property of dirt (for example, sebum dirt) obtained by the cleaning sheet is improved (hereinafter, the action of wiping the dirt by forming the concave-convex region by folding back the flap portion is sometimes referred to as "dirt wiping action"). Further, since the 1 st flap part is folded back, a new surface (uncontaminated surface) of the cleaning sheet is arranged on the surface to be cleaned, and hence the wiping property of the dirt is improved.
Focusing on the plurality of 2 nd flap portions, similarly to the plurality of 1 st flap portions, the small dust collecting action, the large dust catching action, the dust connecting body holding action, and the dirt wiping action are exhibited, but these actions tend to become larger when the cleaning sheet is moved in the other direction of the 1 st direction.
According to the above configuration, when the cleaning sheet is moved in any one of the first direction and the second direction of the 1 st direction, the small garbage collecting function, the large garbage catching function, the garbage connected body holding function, and the dirt wiping function can be exhibited.
[ means A2]
The cleaning sheet according to mode 1, wherein the cleaning sheet includes, in the 1 st direction, a1 st flap portion having a relatively small area arranged inward and a1 st flap portion having a relatively large area arranged outward as the plurality of 1 st flap portions, and includes, as the plurality of 2 nd flap portions, a2 nd flap portion having a relatively small area arranged inward and a2 nd flap portion having a relatively large area arranged outward.
In the cleaning sheet, when the 1 st flap part and the 2 nd flap part which are arranged outward in the 1 st direction and have large areas reciprocate, the dust existing on the surface to be cleaned is captured, and when the amount of dust captured by the cleaning sheet increases and a dust connection body is formed, the dust connection body is easily held by the 1 st flap part and the 2 nd flap part which have large areas. Further, the 1 st flap part and the 2 nd flap part which are arranged inward and have small areas can catch the garbage which is not caught by the 1 st flap part and the 2 nd flap part which are arranged outward and have large areas.
[ means A3]
The cleaning sheet according to mode 1 or 2, wherein each of the plurality of 1 st flap portions has a1 st movable region which is a maximum region where the 1 st flap portion can be present when the 1 st flap portion is folded back at an arbitrary position, and each of the plurality of 2 nd flap portions has a2 nd movable region which is a maximum region where the 2 nd flap portion can be present when the 2 nd flap portion is folded back at an arbitrary position,
the cleaning sheet includes, as the plurality of 1 st flap portions and the plurality of 2 nd flap portions arranged adjacent to each other, a configuration in which a1 st movable region of the 1 st flap portion and a2 nd movable region of the 2 nd flap portion overlap in the thickness direction.
Since the cleaning sheet includes the predetermined 1 st flap part and 2 nd flap part, the predetermined 1 st flap part and 2 nd flap part interfere with each other when the cleaning sheet cleans a surface to be cleaned, and they can perform complicated movements, and the above-described small garbage collecting action, large garbage catching action, garbage connected body holding action, and dirt wiping action can be further exhibited.
[ means A4]
The cleaning sheet according to any one of aspects 1 to 3, wherein the cleaning sheet includes a structure in which a1 st flap part and a2 nd flap part overlap in the thickness direction as the plurality of 1 st flap parts and the plurality of 2 nd flap parts arranged adjacently.
Since the cleaning sheet includes the predetermined 1 st flap part and 2 nd flap part, the predetermined 1 st flap part and 2 nd flap part interfere with each other when the cleaning sheet cleans a surface to be cleaned, and they can perform complicated movements, and the small garbage collecting action, the large garbage catching action, the garbage connected body holding action, and the dirty wiping action described above can be further exhibited.
[ means A5]
The cleaning sheet according to any one of aspects 1 to 4, wherein the cleaning sheet includes, as the plurality of 1 st flap portions and the plurality of 2 nd flap portions which are adjacently disposed, a configuration in which the free end portion of the 1 st flap portion and the free end portion of the 2 nd flap portion do not intersect and the fixed end portion of the 1 st flap portion and the fixed end portion of the 2 nd flap portion intersect.
Since the cleaning sheet includes the predetermined 1 st flap part and 2 nd flap part, the predetermined 1 st flap part and 2 nd flap part can hold the degree of freedom of the free end part which becomes the starting point when the cleaning sheet performs the reciprocating motion when the cleaning sheet cleans the surface to be cleaned, and they can perform complicated movements by the mutual interference, and the above-described small garbage collecting function, large garbage catching function, garbage connected body holding function, and dirt wiping function can be further exhibited.
[ means A6]
A multilayer cleaning sheet comprising a surface sheet and a water-retaining sheet for retaining a chemical solution, wherein,
the surface sheet is constituted by the cleaning sheet according to any one of modes 1 to 5.
In the case where the plurality of 1 st flap parts and 2 nd flap parts are folded back, the water retaining sheet can apply the retained chemical solution to the soiled portion without passing through the topsheet, and can wet the soiled portion and facilitate removal (hereinafter, sometimes referred to as "soiled portion wetting action").
< mode B group >
Specifically, the present invention relates to the following modes B1 to B4.
[ means B1]
A method for continuously producing a material for a cleaning sheet, wherein,
the method comprises the following steps:
a flap part forming step of conveying a belt-like nonwoven fabric having a plurality of material regions constituting the cleaning sheet material in a conveying direction, and forming a plurality of 1 st flap parts each protruding in one direction orthogonal to the conveying direction and not protruding in the conveying direction and a plurality of 2 nd flap parts each protruding in the other direction orthogonal to the orthogonal direction and not protruding in the conveying direction in each of the plurality of material regions; and
and a cleaning sheet material forming step of cutting the belt-shaped nonwoven fabric having passed through the flap portion forming step in the plurality of material regions, respectively, to form a plurality of cleaning sheet materials, each of the cleaning sheet materials having a1 st direction, a2 nd direction, and a thickness direction orthogonal to each other, and including a plurality of 1 st flap portions protruding in one direction of the 1 st direction corresponding to the one direction of the orthogonal direction and not protruding in one direction of the 2 nd direction corresponding to the conveying direction, and a plurality of 2 nd flap portions protruding in the other direction of the 1 st direction corresponding to the other direction of the orthogonal direction and not protruding in one direction of the 2 nd direction corresponding to the conveying direction.
In the above-described manufacturing method, since the predetermined plurality of 1 st flap parts and the predetermined plurality of 2 nd flap parts are formed in the plurality of material regions of the belt-shaped nonwoven fabric constituting the cleaning sheet material, the 1 st flap part and the 2 nd flap part are less likely to be folded when the cleaning sheet is manufactured, specifically, when the belt-shaped nonwoven fabric having passed the flap part forming step is conveyed in the conveying direction.
Further, since the cleaning sheet material (cleaning sheet) manufactured by the above-described manufacturing method includes the plurality of 1 st flap portions protruding in one direction of the 1 st direction and the plurality of 2 nd flap portions protruding in the other direction of the 1 st direction, when the cleaning sheet is reciprocated in the 1 st direction during cleaning, the plurality of 1 st flap portions and the plurality of 2 nd flap portions move to the opposite side to the cleaning direction, and dust can be captured.
[ means B2]
The method according to mode 1, wherein in the flap portion forming step, the plurality of 1 st flap portions and the plurality of 2 nd flap portions are formed such that downstream end portions of the plurality of 1 st flap portions are arranged closer to the one direction in the orthogonal direction than upstream end portions thereof, and such that downstream end portions of the plurality of 2 nd flap portions are arranged closer to the other direction in the orthogonal direction than upstream end portions thereof.
In the above-described manufacturing method, since the plurality of 1 st flap portions and the plurality of 2 nd flap portions are formed at predetermined positions at the upstream end portion and the downstream end portion of each of the plurality of 1 st flap portions and the plurality of 2 nd flap portions in the flap portion forming step, the 1 st flap portion and the 2 nd flap portion are less likely to be folded back when the material for cleaning sheet is manufactured, specifically, when the belt-like nonwoven fabric having passed through the flap portion forming step is conveyed in the conveying direction.
[ means B3]
The method according to mode 1 or 2, wherein in the flap part forming step, the plurality of 1 st flap parts and the plurality of 2 nd flap parts are respectively formed by cutting each of the plurality of material regions without penetrating therethrough.
In the above-described manufacturing method, since each of the plurality of 1 st flap parts and the plurality of 2 nd flap parts is formed by cutting (so-called half-cutting) each of the plurality of material regions without penetrating therethrough, the 1 st flap part and the 2 nd flap part are less likely to be folded back when the cleaning sheet is manufactured, specifically, when the belt-like nonwoven fabric having passed through the flap part forming step is conveyed in the conveying direction.
On the other hand, when the cleaning sheet is used, the 1 st flap part and the 2 nd flap part are separated by a half-cut portion due to contact with a dirty portion having high friction with the surface to be cleaned, and when the cleaning sheet is reciprocated in the 1 st direction, the plurality of 1 st flap parts and the plurality of 2 nd flap parts move to the opposite side to the cleaning direction, and the dust can be captured.
[ means B4]
The method according to any one of modes 1 to 3, wherein in the flap portion forming step, the plurality of 1 st flap portions and the plurality of 2 nd flap portions are formed by intermittently cutting each of the plurality of material regions.
In the above-described manufacturing method, since each of the plurality of 1 st flap parts and the plurality of 2 nd flap parts is formed by intermittently cutting each of the plurality of material regions, the 1 st flap part and the 2 nd flap part are difficult to be folded back when the material for cleaning sheet is manufactured, specifically, when the belt-like nonwoven fabric having passed through the flap part forming step is conveyed in the conveying direction.
On the other hand, when the cleaning sheet is used, the 1 st flap part and the 2 nd flap part are intermittently separated by contacting a dirty part having high friction with the surface to be cleaned, and when the cleaning sheet is reciprocated in the 1 st direction, the plurality of 1 st flap parts and the plurality of 2 nd flap parts are moved to the opposite side to the cleaning direction, and the dust can be caught.
The cleaning sheet of the present invention will be described in detail below.
< embodiment A set >
Fig. 1 to 6 are views for explaining a cleaning sheet 1 according to one embodiment of the present invention (hereinafter referred to as "embodiment a 1"). Specifically, fig. 1 is a front view of the cleaning sheet 1. Fig. 2 is a rear view of the cleaning sheet 1. Fig. 3 is an enlarged perspective view of a region III of fig. 1. Fig. 4 is a view for explaining the reciprocating motion of the 1 st flap part 11 and the 2 nd flap part 21, and corresponds to an enlarged perspective view of the region III in fig. 1. Fig. 5 is a view for explaining the cleaning sheet 1 after cleaning the surface to be cleaned. Fig. 6 is a diagram for explaining a state in which the cleaning sheet 1 is attached to the cleaning tool 101.
The cleaning sheet 1 according to embodiment a1 includes a planar direction P and a thickness direction T that are orthogonal to each other. The plane direction P includes the 1 st directions D orthogonal to each other 1 And the 2 nd direction D 2 In the 1 st direction D 1 Is divided into a1 st direction and a direction D 11 And another direction D from the 1 st direction 12 。
In addition, the 1 st direction D 1 And 2 nd direction D 2 The cleaning sheet 1 is attached to and used in the width direction and the longitudinal direction of the cleaning sheet 1 as follows, as shown in fig. 6: its 1 st direction D 1 (width direction) and sweeperThe width direction S of the cleaning sheet mounting part 105 of the tool 101 is the same, and the 2 nd direction D thereof 2 The longitudinal direction (longitudinal direction) coincides with the longitudinal direction L of the cleaning sheet mounting portion 105 of the cleaning tool 101.
The cleaning sheet 1 is made of nonwoven fabric, has a1 st surface 3 and a2 nd surface 5 opposite to the 1 st surface 3, and includes a cleaning region CR which is a region for cleaning a surface to be cleaned.
Both the 1 st surface 3 and the 2 nd surface 5 may constitute a cleaning surface.
The cleaning sheet 1 includes a plurality of 1 st flap portions 11 and a plurality of 2 nd flap portions 21 in the cleaning region CR.
The plurality of 1 st flap parts 11 are each composed of a1 st end 13 and a1 st other end 15, a1 st fixed end part 17 linearly connecting the 1 st end 13 and the 1 st other end 15, and a1 st free end part 19 convexly curved in a direction away from the 1 st fixed end part 17 with the 1 st end 13 and the 1 st other end 15 as starting points.
Similarly, each of the plurality of 2 nd flap parts 21 is composed of a2 nd end 23 and a2 nd end 25, a2 nd fixed end part 27 linearly connecting the 2 nd end 23 and the 2 nd end 25, and a2 nd free end part 29 convexly curved in a direction away from the 2 nd fixed end part 27 with the 2 nd end 23 and the 2 nd end 25 as starting points.
The 1 st flap parts 11 are respectively directed in the 1 st direction D 11 A plurality of 2 nd flip-chip parts 21 respectively protruding in the 1 st direction and the other direction D 12 And (4) protruding.
The cleaning sheet 1 is provided in the 2 nd direction D 2 Extending in the 1 st direction D 1 The 7 rows of the 1 st flap group, specifically, the 1 st flap group 31, the 1 st flap group 33, the 1 st flap group 3, the 1 st flap group 35, the 1 st flap group 4, the 1 st flap group 5, the 1 st flap group 6, and the 1 st flap group 7, are separately disposed.
For each of the 1 st group 31 to the 1 st group 43 of the 1 st flap portions, each of the 1 st flap portions 11 and each of the 2 nd flap portions 21 of the 1 st flap portions 11 are adjacently disposed so as to project in opposite directions.
In the 1 st direction D 1 Arranged inwardlyThe area of each of the plurality of 1 st flap portions 11 and the plurality of 2 nd flap portions 21 included in the 1 st flap portion 2-2 nd group 33 to 1 st flap portion 6-41 is relatively smaller than the area of each of the plurality of 1 st flap portions 11 and the plurality of 2 nd flap portions 21 included in the 1 st flap portion 1-group 31 and the 1 st flap portion 7-group 43 disposed outward.
With such a configuration, the direction D is in the 1 st direction 1 When the plurality of 1 st flap portions 11 and 2 nd flap portions 21 included in the 1 st group 31 and 1 st group 7 of flap portions 31 and 43 arranged on the outer side perform relatively large reciprocating motions, the garbage connected body having an increased volume is easily held by being involved therein.
Further, the plurality of 1 st flap portions 11 and the plurality of 2 nd flap portions 21 included in the 1 st group 33 to the 1 st group 41 of flap portions 2 arranged on the inward side are reciprocated relatively small, and the garbage not caught by the plurality of 1 st flap portions 11 and the plurality of 2 nd flap portions 21 included in the 1 st group 31 and the 1 st group 43 of flap portions 1 arranged on the outward side can be caught.
In addition, the 1 st flap part 11 included in the 1 st flap part 2 group 33 to the 1 st flap part 6 group 41 is one direction D in the 1 st direction in the cleaning sheet 1 11 When moving, the garbage which is not caught by the 1 st group 31 and the 1 st group 43 of the 1 st flap part can be caught, and the 2 nd flap parts 21 are arranged in the other direction D of the 1 st direction of the cleaning sheet 1 12 When the garbage is moved, the garbage which is not caught by the 1 st group 31 of the 1 st flap part and the 7 th group 43 of the 1 st flap part can be caught.
In addition, the 1 st group 31 to the 1 st group 7 of the flap parts 31 to 43 of the 1 st flap part are directed in the 1 st direction D 11 Each of the 1 st flap parts 11 of the plurality of the 1 st flap parts projecting and the other direction D toward the 1 st direction 12 Each 2 nd flap part 21 of the plurality of 2 nd flap parts 21 protruded in the 2 nd direction D 2 Are alternately arranged. With this configuration, the 1 st flap portions 11 and the 2 nd flap portions 21 interfere with each other, and the small refuse collecting function, the large refuse catching function, the refuse connected body holding function, and the dirt wiping function can be further exhibited.
In fig. 3, the 1 st flap part 11 (the 1 st end 13, the 1 st other end 15, the 1 st fixed end 17, the 1 st free end 19, the 1 st movable region MR1, the 1 st opening 45), specifically, the 1 st flap part 11a (the 1 st end 13a, the 1 st other end 15a, the 1 st fixed end 17a, the 1 st free end 19a, the 1 st movable region MR1a, the 1 st opening 45a) and the 1 st flap part 11c (the 1 st end 13c, the 1 st other end 15c, the 1 st fixed end 17c, the 1 st free end 19c, the 1 st movable region MR1c, the 1 st opening 45c), and the 2 nd flap part 21 (the 2 nd end 23, the 2 nd other end 25, the 2 nd fixed end 27, the 2 nd free end 29, the 2 nd movable region MR2, the 2 nd opening 47), specifically, the 2 nd flap part 21b (the 2 nd end 23b, the 2 nd other end 25b, the 2 nd fixed end 27b, the 2 nd free end 27 nd opening 45c) are shown, The 2 nd free end portion 29b, the 2 nd movable region MR2b, the 2 nd opening 47b), and the 2 nd flap portion 21d (the 2 nd one end 23d, the 2 nd other end (not shown), the 2 nd fixed end portion 27d, the 2 nd free end portion 29d, the 2 nd movable region MR2d, the 2 nd opening 47 d).
As shown in fig. 3, the 1 st movable region MR1 of the 1 st flap portion 11 and the 2 nd movable region MR2 of the 2 nd flap portion 21 adjacent to each other overlap in the thickness direction T. Specifically, the 1 st movable region MR1a of the 1 st flap portion 11a and the 2 nd movable region MR2b of the 2 nd flap portion 21b overlap in the thickness direction T, the 2 nd movable region MR2b of the 2 nd flap portion 21b and the 1 st movable region MR1c of the 1 st flap portion 11c overlap in the thickness direction T, and the 1 st movable region MR1c of the 1 st flap portion 11c and the 2 nd movable region MR2d of the 2 nd flap portion 21d overlap in the thickness direction T.
With this configuration, the 1 st flap 11 and the 2 nd flap 21 interfere with each other, so that a complicated movement can be performed, and a small garbage collecting function, a large garbage catching function, a garbage connected body holding function, and a dirt wiping function can be further exhibited.
As shown in fig. 3, the 1 st flap part 11 and the 2 nd flap part 21 are overlapped with each other in the thickness direction T. Specifically, the 1 st flap portion 11a itself and the 2 nd flap portion 21b itself overlap in the thickness direction T, the 2 nd flap portion 21b itself and the 1 st flap portion 11c itself overlap in the thickness direction T, and the 1 st flap portion 11c itself and the 2 nd flap portion 21d itself overlap in the thickness direction T.
With this configuration, the 1 st flap 11 and the 2 nd flap 21 interfere with each other, so that a complicated movement can be performed, and a small garbage collecting function, a large garbage catching function, a garbage connected body holding function, and a dirt wiping function can be further exhibited.
As shown in fig. 3, the 1 st free end portion 19a of the 1 st flap portion 11a does not intersect the 2 nd free end portion 29b of the adjacent 2 nd flap portion 21b, and the 1 st fixed end portion 17a of the 1 st flap portion 11a intersects the 2 nd fixed end portion 27b of the adjacent 2 nd flap portion 21 b.
Further, the 1 st free end portion 19c of the 1 st flap portion 11c does not intersect the 2 nd free end portion 29d of the adjacent 2 nd flap portion 21d, and the 1 st fixed end portion 17c of the 1 st flap portion 11c intersects the 2 nd fixed end portion 27d of the adjacent 2 nd flap portion 21 d.
With this configuration, the 1 st flap part 11a and the 2 nd flap part 21b can perform a complicated movement by interference while maintaining the degree of freedom of the 1 st free end 19a and the 2 nd free end 29b which become starting points when reciprocating, and can further exhibit a small garbage collecting action, a large garbage catching action, a garbage connected body holding action, and a dirt wiping action. The 1 st flap part 11c and the 2 nd flap part 21d maintain the degree of freedom of the 1 st free end portion 19c and the 2 nd free end portion 29d which become starting points when reciprocating, and can perform complicated movements by mutual interference, and can further exhibit a small garbage collection function, a large garbage catching function, a garbage connected body holding function, and a dirt wiping function.
In fig. 3, the relationship between the 1 st flap part 11 and the 2 nd flap part 21 constituting the 1 st flap part 4-th group 37 is described, but the 1 st flap part 11 and the 2 nd flap part 21 have the same relationship with respect to the 1 st flap part 1-group 31 to the 1 st flap part 7-group 43.
As shown in FIG. 4, the cleaning sheet 1 faces the 1 st direction in one direction D 11 When the first flap part 11 (the 1 st flap part 11a and the 1 st flap part 11c) moves, the other direction D in the 1 st direction 12 Is folded. At this time, the 2 nd flap part 21 (the 2 nd flap part 21b and the 2 nd flap part 21D) is directed in the 1 st direction D 11 Has been foldedIn this case, the 2 nd flap part 21 (the 2 nd flap part 21b and the 2 nd flap part 21D) is folded in the other direction D in the 1 st direction according to the folding of the 1 st flap part 11 (the 1 st flap part 11a and the 1 st flap part 11c) 12 And the device is turned over and easily returns to the original position.
In addition, the 1 st flap part 11 (the 1 st flap part 11a and the 1 st flap part 11c) is turned in the other direction D in the 1 st direction 12 The first opening 45 (the 1 st opening 45a and the 1 st opening 45c) is formed at a portion where the 1 st flap part 11 (the 1 st flap part 11a and the 1 st flap part 11c) is present, and the 2 nd flap part 21 (the 2 nd flap part 21b) is folded in the 1 st direction D 11 The folded sheet is folded to form a2 nd opening 47 (a 2 nd opening 47b and a2 nd opening 47d) at a portion where the 2 nd flap part 21 (the 2 nd flap part 21b) is present.
In addition, since the 1 st opening 45 formed by folding the 1 st flap part 11 tends to maximize the above-described small garbage collecting effect in the vicinity of the 1 st fixed end portion 17 which is the folding starting point of the 1 st flap part 11, the 1 st opening 45 (the 1 st opening 45a and the 1 st opening 45c) is formed in one direction D of the cleaning sheet 1 in the 1 st direction 11 In the case of moving, the effect of collecting the small garbage tends to be large. In addition, since the 2 nd opening 47 formed by folding the 2 nd flap part 21 tends to maximize the above-described small garbage collecting effect in the vicinity of the 2 nd fixed end part 27 which is the folding starting point of the 2 nd flap part 21, the 2 nd opening 47 (the 2 nd opening 47b and the 2 nd opening 47D) is formed in the other direction D in which the cleaning sheet 1 is directed in the 1 st direction 12 In the case of moving, the effect of collecting the small garbage tends to be large.
Although not shown, the cleaning sheet 1 is directed in the 1 st direction and the other direction D 12 When the second flap 21 (the second flap 21b and the second flap 21D) is moved, the second flap 21 is directed in the 1 st direction D 11 Is folded back. Accordingly, the 1 st flap part 11 (the 1 st flap part 11a and the 1 st flap part 11c) is directed in the 1 st direction D 11 And the device is overturned and is easy to return to the original position.
As shown in fig. 6, the cleaning sheet 1 is attached to the cleaning sheet attachment portion 105 of the cleaning tool 101 provided with the grip portion 103 and the cleaning sheet attachment portion 105 such that the 1 st surface 3 of the cleaning sheet 1 is in contact with the surface to be cleaned and the 2 nd surface 5 is in contact with the cleaning sheet attachment portion 105, and when the surface to be cleaned is cleaned, as shown in fig. 5, the plurality of 1 st flap portions 11 and the plurality of 2 nd flap portions 21 are held by being wound around the dust connecting body 107, and small dust (not shown) is collected through each of the plurality of 1 st openings 45 and the plurality of 2 nd openings 47, and small dust (not shown) is held between the cleaning sheet 1 and the cleaning sheet attachment portion 105.
Fig. 7 to 10 are views for explaining the multilayer cleaning sheet 51 according to embodiment a 2. Specifically, fig. 7 is a front view of the multilayer cleaning sheet 51 according to embodiment a 2. Fig. 8 is a rear view of multilayer cleaning sheet 51. Fig. 9 is a sectional view of the multilayer cleaning sheet 51 taken along line IX-IX in fig. 7. Fig. 10 is an enlarged perspective view of the region X of fig. 9.
The multilayer cleaning sheet 51 according to embodiment a2 includes the 1 st surface sheet 53 constituting the cleaning surface, the water retaining sheet 55 for retaining the chemical solution, and the 2 nd surface sheet 57 constituting the cleaning surface in this order, and both the 1 st surface sheet 53 and the 2 nd surface sheet 57 can be used for cleaning the surface to be cleaned.
The 1 st surface sheet 53 and the 2 nd surface sheet 57 are respectively provided with a plurality of 1 st flap parts 11 and a plurality of 2 nd flap parts 21 in the cleaning region CR in the same manner as the cleaning sheet 1 according to the a1 embodiment.
Each of the 1 st flap parts 11 includes a1 st end 13 and a1 st end 15, a1 st fixed end part 17 linearly connecting the 1 st end 13 and the 1 st end 15, and a1 st free end part 19 convexly curved in a direction away from the 1 st fixed end part 17 with the 1 st end 13 and the 1 st end 15 as starting points.
Similarly, each of the plurality of 2 nd flap parts 21 is composed of a2 nd one end 23 and a2 nd other end 25, a2 nd fixed end part 27 linearly connecting the 2 nd one end 23 and the 2 nd other end 25, and a2 nd free end part 29 convexly curved in a direction away from the 2 nd fixed end part 27 with the 2 nd one end 23 and the 2 nd other end 25 as starting points.
The 1 st surface sheet 53 and the 2 nd surface sheet 57 are the same as the cleaning sheet 1 according to the a1 embodiment, and therefore, detailed description thereof is omitted.
As shown in fig. 10, the 1 st surface sheet 53 is made of a nonwoven fabric, and includes a1 st surface sheet 1 st layer 63 constituting the 1 st surface 59 and containing hydrophilic fibers and hydrophobic fibers, and a1 st surface sheet 2 nd layer 65 constituting the 2 nd surface 61 and containing hydrophilic fibers and hydrophobic fibers, and the proportion of the hydrophobic fibers in the 1 st surface sheet 2 nd layer 65 is higher than the proportion of the hydrophobic fibers in the 1 st surface sheet 1 st layer 63. With this configuration, the 1 st layer 63 of the 1 st surface sheet can spread the liquid chemical to the surface to be cleaned to clean the surface to be cleaned, and when the surface to be cleaned has a portion with high friction such as dust or dirt, the 1 st flap part 11 is folded back, and the 1 st layer 65 of the 1 st surface sheet containing hydrophobic fibers at a high ratio comes into contact with the wetted dirt portion, and the dirt portion can be scraped off and removed. In addition, since the 1 st surface sheet 2 nd layer 65 having a high proportion of hydrophobic fibers is difficult to be stuck on the water-retaining sheet 55, the plurality of 1 st flap parts 11 (and the plurality of 2 nd flap parts) are easily folded back when the multilayer cleaning sheet 51 is used.
The 2 nd surface sheet 57 also includes the 1 st layer (not shown) of the 2 nd surface sheet containing hydrophilic fibers and hydrophobic fibers disposed on the surface to be cleaned side and the 2 nd layer (not shown) of the 2 nd surface sheet containing hydrophilic fibers and hydrophobic fibers disposed on the water-retaining sheet 55 side, and the description is omitted because it is the same as the 1 st surface sheet 53.
The structure of the cleaning sheet of the present invention is not particularly limited, and for example, the cleaning sheet can be used as it is as in the embodiment a 1. In the case where the cleaning sheet of the present invention is used as it is, the cleaning surfaces are formed by the 1 st surface and the 2 nd surface.
The cleaning sheet of the present invention can be used as a constituent sheet constituting a multi-layer cleaning sheet comprising a plurality of layers, particularly as a surface sheet.
The multilayer cleaning sheet may be configured by stacking 2 or more of the constituent sheets, and for example, the multilayer cleaning sheet may be configured by stacking the 1 st layer constituent sheet and the 2 nd layer constituent sheet so that a plurality of 1 st flap portions and a plurality of 2 nd flap portions included in the 1 st layer constituent sheet and a plurality of 1 st flap portions and a plurality of 2 nd flap portions included in the 2 nd layer constituent sheet do not coincide with each other in the thickness direction of the multilayer cleaning sheet, for example, so that they do not overlap with each other.
The multilayer cleaning sheet may be composed of 2 constituent sheets and a liquid-impermeable sheet disposed therebetween for holding the liquid chemical, or may be composed of a liquid-impermeable sheet such as a constituent sheet or a film and a water-retaining sheet disposed therebetween. Further, the multilayer cleaning sheet may include a plurality of constituent sheets (e.g., a plurality of constituent sheets having different shapes of the 1 st flap part and the 2 nd flap part) and a water-retaining sheet disposed on one of the constituent sheets.
A multilayer cleaning sheet provided with a water-retaining sheet is preferable from the viewpoint of the above-described wetting action of the contaminated part.
The multilayer cleaning sheet may further include an additional sheet, for example, a mesh sheet, between the constituent sheet and the water-retaining sheet. In addition, from the viewpoint of directly applying the chemical liquid held by the water retaining sheet to garbage, dirt, and the like present on the surface to be cleaned, it is preferable that the constituent sheet and the water retaining sheet are adjacent to each other in the thickness direction of the cleaning sheet.
The nonwoven fabric constituting the cleaning sheet of the present invention is not particularly limited as long as it has a1 st surface on the side of the surface to be cleaned and a2 nd surface opposite to the 1 st surface, and examples of nonwoven fabrics used as cleaning sheets in the art include spunlace nonwoven fabrics, hot air nonwoven fabrics, spunbond nonwoven fabrics, SMS nonwoven fabrics, thermal bond nonwoven fabrics, point bond nonwoven fabrics, meltblown nonwoven fabrics, chemical bond nonwoven fabrics, air-laid nonwoven fabrics, and the like.
The nonwoven fabric preferably contains hydrophilic fibers and hydrophobic fibers, and more preferably contains the hydrophilic fibers and the hydrophobic fibers in a proportion of 5 to 45 mass% and 55 to 95 mass%, further preferably 20 to 30 mass% and 70 to 80 mass%, and further preferably 23 to 28 mass% and 72 to 77 mass%. With this configuration, the cleaning sheet can easily scrape solid-shaped stains and can easily collect hydrophilic liquid stains and hydrophobic liquid stains.
When the nonwoven fabric is composed of 2 or 3 or more layers described below, the ratio of the hydrophilic fibers and the hydrophobic fibers is the ratio of the nonwoven fabric as a whole.
In the case where the cleaning sheet of the present invention is used as a constituent sheet of a multilayer cleaning sheet including a water-retaining sheet, the constituent sheet may be formed of a single layer or may be formed of a plurality of layers.
In the case where the sheet is composed of 2 or 3 or more layers, it is preferable that the 1 st layer constituting the 1 st surface and the 2 nd layer constituting the 2 nd surface each contain hydrophilic fibers and hydrophobic fibers, and that the proportion of the hydrophobic fibers constituting the 2 nd layer is higher than the proportion of the hydrophobic fibers constituting the 1 st layer, more preferably 1.00 to 2.00 times higher, still more preferably 1.05 to 1.50 times higher, and still more preferably 1.10 to 1.20 times higher. With this configuration, the ability of the layer 1 to diffuse the chemical liquid held by the water retaining sheet to the surface to be cleaned is relatively high, and the layer 2 is relatively excellent in scraping performance of the contaminated portion.
Examples of the hydrophilic fiber include cellulose fibers such as pulp fibers, regenerated cellulose fibers, and semi-synthetic cellulose fibers. Examples of the regenerated cellulose fibers include: rayon fibers such as viscose rayon, rich and modal fibers obtained from viscose, cuprammonium rayon fibers (also known as "Cupro") obtained from cuprammonium solutions of cellulose; lyocell fibers and lyocell fibers obtained by an organic solvent spinning method using an organic solvent which is a mixed solution of an organic compound and water and which have not undergone a cellulose derivative.
Examples of the semi-synthetic cellulose fibers include acetate fibers such as triacetyl cellulose and diacetyl cellulose.
Examples of the hydrophobic fibers include: synthetic fibers, such as heat-fusible fibers, for example polyolefin-based polymers, such as polyethylene or polypropylene; polyester-based polymers such as terephthalic-based polymers, e.g., polyethylene terephthalate (PET), polybutylene terephthalate, polypentyl terephthalate; polyamide-based polymers such as nylon 6 or nylon 6, 6; a propylene-based polymer; a polyacrylonitrile-based polymer; or a modified product thereof, or a combination thereof.
The water-retaining sheet is not particularly limited as long as it can retain a chemical solution, and any material that can be used as a water-retaining sheet in the art, for example, air-laid pulp, spunlace nonwoven fabric, pulp sheet, sheet-like sponge, or the like can be used without limitation.
The water-retaining sheet may contain hydrophilic fibers for retaining the drug solution. The hydrophilic fiber may be the same fiber as that described for the surface sheet. For example, the airlaid pulp can comprise synthetic fibers as described in the context of the topsheet, as well as hydrophilic fibers (e.g., pulp fibers).
The liquid chemical held in the water-retaining sheet may be any liquid chemical known in the art.
The cleaning sheet of the present invention includes a plurality of 1 st flap portions and a plurality of 2 nd flap portions in a cleaning region. The plurality of 1 st flap portions and the plurality of 2 nd flap portions are not particularly limited as long as each of the plurality of 1 st flap portions and the plurality of 2 nd flap portions is formed of one end and the other end, a linear fixed end portion connecting the one end and the other end, and a free end portion convexly curved in a direction away from the fixed end portion with the one end and the other end as starting points.
The radius of curvature of the farthest portion of the free end portion of each of the plurality of 1 st flap portions and the plurality of 2 nd flap portions from the fixed end portion is preferably 3.0 to 25.0mm, more preferably 5.0 to 20.0mm, and still more preferably 7.0 to 15.0 mm. With this configuration, when the cleaning sheet of the present invention is used, each of the plurality of 1 st flap portions and the plurality of 2 nd flap portions is easily reciprocated.
Fig. 12 is a view for explaining an example of a flap part in the cleaning sheet of the present invention. The flap 301 shown in fig. 12(a) includes one end 303 and the other end 305, a fixed end 307 connecting the one end 303 and the other end 305 linearly, and a free end 309 curved convexly in a direction away from the fixed end 307 with the one end 303 and the other end 305 as starting points, and the free end 309 has a radius of curvature R 1 And the farthest part 311 has a radius of curvature R 1 。
The flap 301 shown in fig. 12(b) includes one end 303 and the other end 305, a fixed end 307 connecting the one end 303 and the other end 305 linearly, and a free end 309 curved convexly in a direction away from the fixed end 307 with the one end 303 and the other end 305 as starting points, the free end 309 being an elliptical arc portion, and the farthest portion 311 having a radius of curvature R 2 。
The cleaning sheet of the present invention may include a plurality of 1 st flap portions and a plurality of 2 nd flap portions each having an arbitrary size, and the cleaning sheet preferably includes, as the plurality of 1 st flap portions, a1 st flap portion having a relatively small area disposed inward and a1 st flap portion having a relatively large area disposed outward in the 1 st direction. With this configuration, the 1 st flap part having a relatively large area disposed on the outer side can hold the bulky connected garbage easily, for example, by rolling up the connected garbage during a relatively large reciprocating motion. Further, the 1 st flap portion arranged on the inner side and having a small area reciprocates relatively small, and the waste not caught by the 1 st flap portion arranged on the outer side and having a large area can be caught.
For the same reason, the cleaning sheet preferably includes, as the plurality of 2 nd flap parts, a2 nd flap part having a relatively small area disposed inward and a2 nd flap part having a relatively large area disposed outward in the 1 st direction.
In the cleaning sheet of the present invention, it is preferable that each of the plurality of 1 st flap parts has a predetermined 1 st movable region and each of the plurality of 2 nd flap parts has a predetermined 2 nd movable region, and that the cleaning sheet includes the plurality of 1 st flap parts and the plurality of 2 nd flap parts adjacently arranged, and the 1 st movable region of the 1 st flap part and the 2 nd movable region of the 2 nd flap part overlap in a thickness direction of the cleaning sheet. With such a configuration, the cleaning sheet of the present invention can further exhibit the small refuse collecting action, the large refuse trapping action, the refuse connected body holding action, and the dirt wiping action described above.
In the cleaning sheet of the present invention, it is preferable that the plurality of 1 st flap portions and the plurality of 2 nd flap portions arranged adjacently include a structure in which the 1 st flap portion and the 2 nd flap portion are overlapped in the thickness direction of the cleaning sheet. With this configuration, the cleaning sheet of the present invention can further exhibit the above-described small refuse collecting action, large refuse catching action, refuse-connected body holding action, and dirt wiping action.
In the cleaning sheet of the present invention, it is preferable that the plurality of 1 st flap portions and the plurality of 2 nd flap portions adjacently arranged include a structure in which the free end portion of the 1 st flap portion and the free end portion of the 2 nd flap portion do not intersect each other and the fixed end portion of the 1 st flap portion and the fixed end portion of the 2 nd flap portion intersect each other. With this configuration, the cleaning sheet of the present invention can further exhibit the above-described small refuse collecting action, large refuse catching action, refuse-connected body holding action, and dirt wiping action.
< mode B group >
The method for continuously producing a material for a cleaning sheet (hereinafter, sometimes simply referred to as "production method") of the present invention includes the following steps.
A flap portion forming step (hereinafter, sometimes referred to as "flap portion forming step") of conveying a belt-shaped nonwoven fabric having a plurality of material regions constituting the cleaning sheet material in a conveying direction, and forming a plurality of 1 st flap portions (each of which does not protrude in the conveying direction) protruding in one direction orthogonal to the conveying direction and a plurality of 2 nd flap portions (each of which does not protrude in the conveying direction) protruding in the other direction orthogonal to the conveying direction in each of the plurality of material regions.
A cleaning sheet material forming step (hereinafter, sometimes referred to as "cleaning sheet material forming step") of cutting the belt-shaped nonwoven fabric having passed through the flap portion forming step into the plurality of material regions, respectively, to form a plurality of cleaning sheet materials each having a1 st direction, a2 nd direction, and a thickness direction orthogonal to each other, and including: a plurality of 1 st flap portions projecting in one direction of a1 st direction corresponding to the one direction of the orthogonal direction and not projecting in one direction of a2 nd direction corresponding to the conveyance direction; and a plurality of 2 nd flap portions projecting in the other direction of the 1 st direction corresponding to the other direction of the orthogonal direction and not projecting in the one direction of the 2 nd direction corresponding to the carrying direction.
The production method of the present invention will be described in detail below.
Fig. 13 to 15 are views for explaining a manufacturing method according to one of the embodiments of the present invention (hereinafter referred to as "embodiment B1"). Specifically, fig. 13 is a view for explaining a flap portion forming step of the manufacturing method according to the B1 embodiment, and fig. 14 is a view for explaining a cleaning sheet material forming step of the manufacturing method according to the B1 embodiment. Fig. 15 is an enlarged view of a region III of fig. 14.
In addition, the material 401 for a cleaning sheet manufactured according to the manufacturing method of the B1 embodiment is the same as the cleaning sheet 1 in the a1 embodiment.
As shown in fig. 13, in the flap portion forming step, a belt-like nonwoven fabric 405 having a plurality of material regions 403 constituting the cleaning sheet material 401 is conveyed in the conveyance direction MD by using a conveyor 451 and a conveyor 453, and is passed to a1 st cutting section 455 composed of a cutting roller 457 and an anvil roller 461, and a one-direction CD in a direction orthogonal to a direction CD orthogonal to the conveyance direction MD, that is, an orthogonal direction CD, is formed in each of the plurality of material regions 403 1 A plurality of 1 st flap parts 11 protruding and facing the other direction of the orthogonal direction CD, that is, the other direction CD of the orthogonal direction 2 A plurality of 2 nd flap parts 21 protruded.
The cutter roller 457 includes a plurality of blades 459 corresponding to the plurality of 1 st flap parts 11 and the plurality of 2 nd flap parts 21, and the plurality of 1 st flap parts 11 (specifically, the 1 st free end portions 19) are formed to penetrate the plurality of material regions 403 (the tape-shaped nonwoven fabric 405), respectively, and the plurality of 2 nd flap parts 21 (specifically, the 2 nd free end portions 29) are formed to penetrate the plurality of material regions 403 (the tape-shaped nonwoven fabric 405), respectively.
The 1 st flap parts 11 are respectively arranged in one direction CD in the orthogonal direction 1 And does not protrude in the conveyance direction MD. In addition, each of the plurality of 2 nd flap parts 21 is oriented in the other direction CD in the orthogonal direction 2 And does not protrude in the conveyance direction MD.
More specifically, in the flap part forming step, the plurality of 1 st flap parts 11 are formed such that the 1 st downstream end 473 of the downstream side of each of the plurality of 1 st flap parts 11 is orthogonal to the 1 st upstream end 475 of the upstream side in the one direction CD 1 And (4) ground configuration. The plurality of 2 nd flap parts 21 are formed such that the 2 nd downstream end 477 of the downstream side of each of the plurality of 2 nd flap parts 21 is orthogonal to the 2 nd upstream end 479 of the upstream side thereof in the other direction CD 2 And (4) ground configuration. With this configuration, when the cleaning sheet material 401 is manufactured, specifically, when the belt-like nonwoven fabric 405 having passed through the flap portion forming step is conveyed in the conveyance direction MD, the plurality of 1 st flap portions 11 and the plurality of 2 nd flap portions 21 are not easily folded.
In the flap part forming step, for example, the belt-shaped nonwoven fabric 405 can be conveyed in the conveyance direction MD at a speed of 28 to 280 m/min, and when the belt-shaped nonwoven fabric 405 is focused, the belt-shaped nonwoven fabric 405 (the plurality of 1 st flap parts 11 and the plurality of 2 nd flap parts 21) receives an air velocity in the direction opposite to the conveyance direction MD.
As shown in fig. 14, in the cleaning sheet material forming step, the belt-like nonwoven fabric 405 having passed through the flap portion forming step is conveyed in the conveyance direction MD by the conveyor belts 453 and 463, and the belt-like nonwoven fabric 405 is cut into the plurality of material regions 403 by the 2 nd cutter 465 constituted by the cutter roller 467 and the anvil roller 471, thereby forming the plurality of cleaning sheet materials 401. Further, the cutter roller 467 includes a blade 469 extending in the orthogonal direction CD.
The plurality of cleaning sheet materials 401 have respective 1 st directions D orthogonal to each other 1 In the 2 nd direction D 2 And a thickness direction T, including: a plurality of 1 st flap parts 11 facing in one direction CD perpendicular to the direction 1 Corresponding 1 st direction D 1 1 st direction and a direction D 11 Protruding in the 2 nd direction D not corresponding to the conveying direction MD 2 2 nd direction and a direction D 21 Protruding; and a plurality of 2 nd flap parts 21 facing the other direction CD perpendicular to the orthogonal direction 2 Corresponding 1 st direction D 1 1 st direction and the other direction D 12 Is protrudedAnd not in the 2 nd direction D corresponding to the conveyance direction MD 2 2 nd direction and a direction D 21 And (4) protruding.
In the cleaning sheet material 401, similarly to the cleaning sheet 1 in the a 1-th embodiment, the 1 st downstream end 473 and the 1 st upstream end 475 of the 1 st flap part 11 formed in the flap part forming step correspond to the 1 st other end 15 and the 1 st end 13 of the cleaning sheet 1, respectively, and the 2 nd downstream end 477 and the 2 nd upstream end 479 of the 2 nd flap part 21 correspond to the 2 nd other end 25 and the 2 nd end 23, respectively.
In the cleaning sheet material forming step, similarly to the flap portion forming step, for example, the belt-shaped nonwoven fabric 405 can be conveyed in the conveyance direction MD at a speed of 28 to 280 m/min, and when the belt-shaped nonwoven fabric 405 is focused, the belt-shaped nonwoven fabric 405 (the plurality of 1 st flap portions 11 and the plurality of 2 nd flap portions 21) receives an air velocity in the direction opposite to the conveyance direction MD.
In the cleaning sheet material forming step, too, the plurality of 1 st flap parts 11 and the plurality of 2 nd flap parts 21, which do not protrude in the conveyance direction MD, are formed from the belt-shaped nonwoven fabric 405 (the plurality of material regions 403) and the plurality of cleaning sheet materials 401, so that it is difficult for the plurality of 1 st flap parts 11 and the plurality of 2 nd flap parts 21 to be folded back, respectively, when the belt-shaped nonwoven fabric 405 is conveyed in the conveyance direction MD in the cleaning sheet material forming step at the time of manufacturing the cleaning sheet material 401.
The cleaning sheet material 401 can be used as it is as the cleaning sheet 1.
As described above, the cleaning sheet material 401 (cleaning sheet 1) is the same as the cleaning sheet 1 according to embodiment a1, and therefore, the description thereof is omitted.
The cleaning sheet material 401 can be used as a (single-layer) cleaning sheet 1 as it is, or can be used as a component of a multi-layer cleaning sheet. The multilayer cleaning sheet 51 shown in embodiment a2 can be used as an example of the multilayer cleaning sheet, and the description thereof will be omitted.
The material for cleaning sheets produced by the production method of the present invention is not particularly limited, and can be used as it is as a cleaning sheet, for example, as in embodiment B1. In the case where the cleaning sheet is used as it is, both surfaces of the cleaning sheet (cleaning sheet material) constitute cleaning surfaces.
The material for cleaning sheets produced by the production method can be used as a constituent sheet constituting a multi-layer cleaning sheet including a plurality of layers, particularly as a top sheet.
The multilayer cleaning sheet includes the matters described in connection with the embodiment a group.
The material for the cleaning sheet is not particularly limited, and may be a film or a fabric (for example, a nonwoven fabric, a woven fabric or a knitted fabric), and examples thereof include a spunlace nonwoven fabric, a through-air nonwoven fabric, a spunbond nonwoven fabric, an SMS nonwoven fabric, a thermal bond nonwoven fabric, a point bond nonwoven fabric, a meltblown nonwoven fabric, a chemical bond nonwoven fabric, and an air-laid nonwoven fabric.
When the material of the cleaning sheet material is a fabric (for example, a nonwoven fabric) containing fibers, the fabric preferably contains hydrophilic fibers and hydrophobic fibers, and more preferably contains the hydrophilic fibers and the hydrophobic fibers in a proportion of 5 to 45 mass% and 55 to 95 mass%, even more preferably 20 to 30 mass% and 70 to 80 mass%, and even more preferably 23 to 28 mass% and 72 to 77 mass%. With this configuration, the cleaning sheet material can easily scrape solid-shaped stains and can easily collect hydrophilic liquid stains and hydrophobic liquid stains.
When the fabric is composed of 2 or 3 or more layers described later, the ratio of the hydrophilic fiber and the hydrophobic fiber is the ratio of the entire fabric.
When the cleaning sheet material is used as a constituent sheet of a multilayer cleaning sheet including a water-retaining sheet, the cleaning sheet material may be composed of a single layer or may be composed of a plurality of layers.
In the case where the cleaning sheet material is composed of 2 or 3 or more layers, the 1 st layer constituting the 1 st surface on the surface to be cleaned and the 2 nd layer constituting the 2 nd surface on the water-retaining sheet side preferably contain hydrophilic fibers and hydrophobic fibers, respectively, and the proportion of the hydrophobic fibers constituting the 2 nd layer is preferably higher than the proportion of the hydrophobic fibers constituting the 1 st layer, more preferably 1.00 to 2.00 times higher, still more preferably 1.05 to 1.50 times higher, and still more preferably 1.10 to 1.20 times higher. With this configuration, the ability of the layer 1 to diffuse the chemical liquid held by the water-retaining sheet to the surface to be cleaned is relatively high, and the layer 2 is relatively excellent in scraping performance of the contaminated portion when the plurality of the 1 st flap portions and/or the plurality of the 2 nd flap portions are folded back. In addition, since the layer 2 having a high proportion of hydrophobic fibers is difficult to adhere to the water-retaining sheet, the plurality of 1 st flap parts and/or the plurality of 2 nd flap parts are easily folded back when the cleaning sheet is used.
The hydrophilic fibers and the hydrophobic fibers have the configurations described in embodiment a.
The water-retaining sheet has the structure described in the embodiment a group.
In the manufacturing method of the present invention, a cleaning sheet material having a plurality of the 1 st flap portions and a plurality of the 2 nd flap portions is formed. The plurality of 1 st flap portions and the plurality of 2 nd flap portions are each configured by one end and the other end, a linear fixed end portion connecting the one end and the other end, and a free end portion protruding in a direction away from the fixed end portion with the one end and the other end as starting points, and may have any shape without particular limitation, and it is preferable that the free end portion is convexly curved in a direction away from the fixed end portion with the one end and the other end as starting points.
The radius of curvature of the farthest portion of the free end portion of each of the plurality of 1 st flap portions and the plurality of 2 nd flap portions from the fixed end portion is preferably 3.0 to 25.0mm, more preferably 5.0 to 20.0mm, and still more preferably 7.0 to 15.0 mm. With this configuration, when the cleaning sheet material (single-layer cleaning sheet, multi-layer cleaning sheet) is used, the plurality of 1 st flap portions and the plurality of 2 nd flap portions are easily reciprocated.
Fig. 16 is a view for explaining an example of a flap portion in the cleaning sheet material manufactured by the manufacturing method of the present invention. The flap portion 501 shown in fig. 16(a) includes one end 503 and the other end 505,A fixed end part 507 connecting the one end 503 and the other end 505 linearly, and a free end part 509 convexly curved in a direction away from the fixed end part 507 with the one end 503 and the other end 505 as starting points, the free end part 509 having a curvature radius R 1 And the farthest part 511 has a radius of curvature R 1 。
The flap portion 501 shown in fig. 16(b) includes one end 503 and the other end 505, a fixed end portion 507 connecting the one end 503 and the other end 505 linearly, and a free end portion 509 curved convexly in a direction away from the fixed end portion 507 with the one end 503 and the other end 505 as starting points, the free end portion 509 being an elliptic arc portion, and the farthest portion 511 having a radius of curvature R 2 。
The flap portion 501 shown in fig. 16(c) includes one end 503 and the other end 505, a fixed end portion 507 connecting the one end 503 and the other end 505 linearly, and a free end portion 509 (including 2 linear portions and an elliptical arc portion therebetween), and the farthest portion 511 has a radius of curvature R 3 。
The flap portion 501 shown in fig. 16(d) includes one end 503 and the other end 505, a fixed end portion 507 connecting the one end 503 and the other end 505 linearly, and a free end portion 509 (including 3 straight portions), and the farthest portion 511 includes a straight portion having an intersection angle of 0 ° with respect to the fixed end portion 507. The flap 201 shown in fig. 11 corresponds to the flap of the cleaning sheet material manufactured by the manufacturing method of the present invention.
In the manufacturing method of the present invention, a cleaning sheet material having a plurality of the 1 st flap parts and a plurality of the 2 nd flap parts with an arbitrary size can be formed, and it is preferable to form the following cleaning sheet material: the plurality of 1 st flap portions include a1 st flap portion having a relatively small area disposed inward and a1 st flap portion having a relatively large area disposed outward in the 1 st direction. With this configuration, in the cleaning sheet material (single-layer cleaning sheet, multi-layer cleaning sheet) to be formed, when the 1 st flap portion disposed on the outer side and having a relatively large area is relatively largely reciprocated, the connected garbage can be easily held in a bulky state by, for example, rolling in the connected garbage. Further, the 1 st flap portion arranged on the inner side and having a small area reciprocates relatively small, and the waste not caught by the 1 st flap portion arranged on the outer side and having a large area can be caught.
For the same reason, the cleaning sheet material produced by the production method of the present invention preferably includes, as the plurality of 2 nd flap parts, a2 nd flap part having a relatively small area disposed inward and a2 nd flap part having a relatively large area disposed outward in the 1 st direction.
In the manufacturing method of the present invention, in the flap portion forming step, the plurality of 1 st flap portions are preferably formed such that downstream end portions of the plurality of 1 st flap portions are disposed closer to one direction orthogonal to an upstream end portion thereof. Preferably, the plurality of 2 nd flap portions are formed such that downstream end portions of the plurality of 2 nd flap portions are disposed closer to one direction orthogonal to the other direction than upstream end portions thereof. With this configuration, when the cleaning sheet material is manufactured, specifically, when the belt-like nonwoven fabric having passed through the flap portion forming step is conveyed in the conveying direction, the 1 st flap portion and the 2 nd flap portion are less likely to be folded back.
In the manufacturing method of the present invention, in the flap part forming step, the plurality of 1 st flap parts and at least a part of the plurality of 2 nd flap parts may be formed by continuously through-cutting each of the plurality of material regions in the planar direction of the plurality of material regions, and the plurality of 1 st flap parts and at least a part of the plurality of 2 nd flap parts may be formed by intermittently through-cutting in the planar direction of the plurality of material regions. The plurality of first flap parts and the plurality of second flap parts are formed by intermittently cutting through in the planar direction of the plurality of material regions, and at least a part of the plurality of first flap parts and the plurality of second flap parts are difficult to fold when the material for cleaning sheet is manufactured, specifically, when the belt-like nonwoven fabric having passed through the flap part forming step is conveyed in the conveying direction.
In the manufacturing method of the present invention, in the flap portion forming step, the plurality of material regions may be formed without cutting each of the plurality of material regions so as to penetrate in the thickness direction of the plurality of material regions, and at least a part of the plurality of 1 st flap portions and the plurality of 2 nd flap portions may be formed. With this configuration, when the cleaning sheet material is manufactured, specifically, when the belt-like nonwoven fabric having passed through the flap portion forming step is conveyed in the conveying direction, the 1 st flap portion and the 2 nd flap portion are less likely to be folded back.
In the production method of the present invention, it is preferable that the following cleaning sheet material is formed: the plurality of 1 st flap parts each have a predetermined 1 st movable region, the plurality of 2 nd flap parts each have a predetermined 2 nd movable region, and the plurality of 1 st flap parts and the plurality of 2 nd flap parts are adjacently arranged, and the 1 st movable region of the 1 st flap part and the 2 nd movable region of the 2 nd flap part overlap in the thickness direction of the cleaning sheet material. With this configuration, the cleaning sheet material (single-layer cleaning sheet, multi-layer cleaning sheet) can further exhibit a small garbage collecting effect, a large garbage catching effect, a garbage connected body holding effect, and a dirt wiping effect.
In the production method of the present invention, it is preferable that the following cleaning sheet material is formed: the plurality of 1 st flap portions and the plurality of 2 nd flap portions are adjacently arranged, and the 1 st flap portion and the 2 nd flap portion are overlapped in the thickness direction of the cleaning sheet material. With this configuration, the cleaning sheet material (single-layer cleaning sheet, multi-layer cleaning sheet) can further exhibit a small garbage collecting effect, a large garbage catching effect, a garbage connected body holding effect, and a dirt wiping effect.
In the material for a cleaning sheet produced by the production method of the present invention, when a single-layer cleaning sheet made of a cleaning sheet material or a multi-layer cleaning sheet including a cleaning sheet material is attached to a cleaning tool and a surface to be cleaned is cleaned, if the cleaning sheet (multi-layer cleaning sheet) is moved in one direction of the 1 st direction, the 1 st flap part comes into contact with a portion having high friction (for example, a dirty portion), and in this case, if the 1 st flap part is folded back in the other direction with the 1 st surface as the inside (in the present specification, the "flap part is folded back in the other direction with the 1 st surface as the inside" may be abbreviated as "flap part (in the other direction)"), a1 st opening part is formed in a portion where the 1 st flap part of the cleaning sheet (multi-layer cleaning sheet) is present, and small dust can be collected from the 1 st opening part into the inside (for example, between the cleaning sheet (multi-layer cleaning sheet) and the cleaning tool), Cleaning sheets (multi-layer cleaning sheets) and water retention sheets (in this specification, the action of the flap portion to take in small garbage from the opening portion into the inside is referred to as "small garbage taking-in action"). Further, since the small dust collecting effect is maximized in the vicinity of the fixed end of the 1 st opening, the effect tends to be further increased when the cleaning sheet (multi-layer cleaning sheet) is moved in one direction. In addition, the small trash was also taken into the fibers of the nonwoven fabric and removed.
Further, when reciprocating (moving the cleaning sheet (the multi-layer cleaning sheet) in one direction of the 1 st direction and folding the 1 st flap part in the other direction, and returning the cleaning sheet (the multi-layer cleaning sheet) in the other direction of the 1 st direction and returning the 1 st flap part in one direction), the 1 st flap part can catch the large garbage (in this specification, an action of catching the large garbage by reciprocating the flap part is referred to as a "large garbage catching action"). Further, since the cleaning sheet (multi-layer cleaning sheet) is thick, when the 1 st flap part is folded back in the other direction, that is, when the cleaning sheet (multi-layer cleaning sheet) is moved in one direction, the large dust trapping effect tends to be larger.
Further, when the cleaning sheet (multilayer cleaning sheet) is used to clean the surface to be cleaned, dust such as hair and dust present on the surface to be cleaned is initially captured in the peripheral portion of the cleaning sheet (multilayer cleaning sheet), and dust not captured in the peripheral portion of the cleaning sheet (multilayer cleaning sheet) tends to move toward the central portion of the cleaning sheet (multilayer cleaning sheet). Therefore, when the amount of dust captured by the cleaning sheet (multi-layer cleaning sheet) increases, the amount of dust such as hair and dust captured tends to overlap with the dust such as hair and dust present on the surface to be cleaned at the peripheral edge of the cleaning sheet (multi-layer cleaning sheet) to form a bar-shaped dust connection body. The 1 st flap portion can continuously hold the connected garbage (hereinafter, the operation of continuously holding the connected garbage during the reciprocating motion of the flap portion may be referred to as "garbage holding operation"). Further, since the cleaning sheet (multi-layer cleaning sheet) is thick, the above-mentioned holding action of the connected garbage is liable to become greater when the 1 st flap part is folded back in the other direction, that is, when the cleaning sheet (multi-layer cleaning sheet) is moved in one direction.
Further, when the 1 st flap part is folded back, that is, when the cleaning sheet (multilayer cleaning sheet) is moved in one direction, the cleaning sheet (multilayer cleaning sheet) becomes a concave-convex region having a convex region overlapping the folded-back 1 st flap part in the thickness direction and a concave region overlapping the 1 st opening part in the thickness direction, and therefore, the wiping property of dirt (for example, sebum dirt in a solid form) obtained by the cleaning sheet (multilayer cleaning sheet) is improved (in this specification, the action of wiping off dirt by forming the concave-convex region by folding back the flap part is referred to as "dirt wiping action").
Focusing on the plurality of 2 nd flap parts, like the plurality of 1 st flap parts, the small garbage collecting action, the large garbage catching action, the garbage connected body holding action, and the dirt wiping action are exhibited, but these actions tend to become larger when the cleaning sheet (multi-layer cleaning sheet) is moved in the other direction of the 1 st direction.
According to the above configuration, when the cleaning sheet (multi-layer cleaning sheet) is moved in any one of the first direction and the second direction of the 1 st direction, the small garbage collecting function, the large garbage catching function, the garbage connected body holding function, and the dirt wiping function can be exhibited.
In the case where the plurality of 1 st flap parts and 2 nd flap parts are folded back, the water-retaining sheet can apply the retained chemical solution to the soiled portion without passing through the topsheet, and can wet the soiled portion, thereby facilitating removal (referred to as "soiled portion wetting action" in the present specification).
In the manufacturing method of the present invention, it is preferable to form the following cleaning sheet material: and a plurality of 1 st flap portions and a plurality of 2 nd flap portions arranged adjacently, wherein the free end portion of the 1 st flap portion does not intersect the free end portion of the 2 nd flap portion, and the fixed end portion of the 1 st flap portion intersects the fixed end portion of the 2 nd flap portion. With this configuration, the cleaning sheet material (single-layer cleaning sheet, multi-layer cleaning sheet) can further exhibit a small garbage collecting effect, a large garbage trapping effect, a garbage connected body holding effect, and a dirt wiping effect.
Description of the reference numerals
1 cleaning sheet
3 item 1
5 item 2
11 st turning part
17 1 st fixed end
19 st free end
21 nd 2 sheet turning part
27 nd 2 nd fixing end part
29 nd 2 nd free end portion
45 st opening part
47 nd 2 nd opening part
51 multilayer cleaning sheet
53 No. 1 surface sheet
55 water-retaining sheet
57 No. 2 surface sheet
401 cleaning sheet material
403 material region
405-strip-shaped nonwoven fabric
451 conveyor belt
453 conveyer belt
455 st cutting part
457 cutting roller
459 knife edge
461 anvil roll
463 transport belt
465 No. 2 cutting part
467 cutting roller
469 knife edge
471 anvil roller
CR cleaning region
Direction of P plane
D 1 The 1 st direction
D 2 The 2 nd direction
D 21 2 nd direction one direction
D 22 2 nd direction and the other direction
T thickness direction
1 st movable region of MR1
MR2 2 nd region of motion
L longitudinal direction
S width direction
MD conveying direction
CD orthogonal direction
CD 1 One direction of orthogonal direction
CD 2 Orthogonal to the other direction
Claims (8)
1. A cleaning sheet comprising a nonwoven fabric and having a1 st direction, a2 nd direction, a thickness direction and a cleaning region which are orthogonal to each other,
the cleaning sheet is provided with a plurality of 1 st flap parts protruding in one direction of the 1 st direction and a plurality of 2 nd flap parts protruding in the other direction of the 1 st direction in the cleaning area,
each of the 1 st flap part and the 2 nd flap part includes one end and the other end, a free end portion and a fixed end portion connecting the one end and the other end, the free end portion being convexly curved in a direction away from the fixed end portion with the one end and the other end as starting points,
each 1 st flap portion of the plurality of 1 st flap portions is disposed adjacent to each 2 nd flap portion of the plurality of 2 nd flap portions,
the cleaning sheet is provided with a1 st flap part having a relatively small area disposed inward and a1 st flap part having a relatively large area disposed outward as the 1 st flap parts, and with a2 nd flap part having a relatively small area disposed inward and a2 nd flap part having a relatively large area disposed outward as the 2 nd flap parts in the 1 st direction,
the 1 st flap portion having a relatively large area and the 2 nd flap portion having a relatively large area hold a connected body of garbage formed by an increase in the amount of garbage, and the 1 st flap portion having a relatively small area and the 2 nd flap portion having a relatively small area capture garbage which is not captured by the 1 st flap portion having a relatively large area and the 2 nd flap portion having a relatively large area.
2. The cleaning sheet according to claim 1, wherein,
each of the 1 st flap portions has a1 st movable region which is a maximum region where the 1 st flap portion can be present when the 1 st flap portion is folded back at an arbitrary position, each of the 2 nd flap portions has a2 nd movable region which is a maximum region where the 2 nd flap portion can be present when the 2 nd flap portion is folded back at an arbitrary position,
the cleaning sheet includes, as the plurality of 1 st flap parts and the plurality of 2 nd flap parts adjacently arranged, a structure in which a1 st movable region of the 1 st flap part and a2 nd movable region of the 2 nd flap part overlap in the thickness direction.
3. The cleaning sheet according to claim 1 or 2,
the cleaning sheet includes a structure in which the 1 st flap part and the 2 nd flap part are overlapped in the thickness direction as the plurality of 1 st flap parts and the plurality of 2 nd flap parts arranged adjacently.
4. The cleaning sheet according to claim 1 or 2,
the cleaning sheet includes, as the plurality of 1 st flap portions and the plurality of 2 nd flap portions disposed adjacent to each other, a configuration in which the free end portion of the 1 st flap portion and the free end portion of the 2 nd flap portion do not intersect each other and the fixed end portion of the 1 st flap portion and the fixed end portion of the 2 nd flap portion intersect each other.
5. A multilayer cleaning sheet comprising a surface sheet and a water-retaining sheet for retaining a chemical solution, wherein,
the surface sheet is composed of the cleaning sheet according to any one of claims 1 to 4.
6. A method for continuously manufacturing a material for a cleaning sheet, wherein,
the method for continuously manufacturing the material for the cleaning sheet comprises the following steps:
a flap portion forming step of forming, for each of the material regions, a plurality of 1 st flap portions that protrude in one direction orthogonal to the conveyance direction and do not protrude in the conveyance direction, and a plurality of 2 nd flap portions that protrude in the other direction orthogonal to the orthogonal direction and do not protrude in the conveyance direction, while conveying a belt-shaped nonwoven fabric having a plurality of material regions that constitute the cleaning sheet material in the conveyance direction; and
a cleaning sheet material forming step of cutting the belt-shaped nonwoven fabric having passed the flap portion forming step in the plurality of material regions to form a plurality of cleaning sheet materials, each of the cleaning sheet materials having a1 st direction, a2 nd direction, and a thickness direction orthogonal to each other and including a plurality of 1 st flap portions protruding in one direction of the 1 st direction corresponding to the one direction of the orthogonal direction and not protruding in one direction of the 2 nd direction corresponding to the conveying direction, and a plurality of 2 nd flap portions protruding in the other direction of the 1 st direction corresponding to the other direction of the orthogonal direction and not protruding in one direction of the 2 nd direction corresponding to the conveying direction,
in the flap forming step, the plurality of 1 st flap portions and the plurality of 2 nd flap portions are formed such that the downstream end portion of each of the plurality of 1 st flap portions is arranged closer to the one direction in the orthogonal direction than the upstream end portion thereof, and the downstream end portion of each of the plurality of 2 nd flap portions is arranged closer to the other direction in the orthogonal direction than the upstream end portion thereof.
7. The method for continuously manufacturing a material for a cleaning sheet according to claim 6, wherein,
in the flap part forming step, the plurality of 1 st flap parts and the plurality of 2 nd flap parts are formed by cutting each of the plurality of material regions without penetrating therethrough.
8. The method for continuously manufacturing a material for a cleaning sheet according to claim 6 or 7, wherein,
in the flap part forming step, the plurality of 1 st flap parts and the plurality of 2 nd flap parts are respectively formed by intermittently cutting each of the plurality of material regions.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-114966 | 2018-06-15 | ||
| JP2018114966A JP6847078B2 (en) | 2018-06-15 | 2018-06-15 | Method of continuously manufacturing materials for cleaning sheets |
| JP2018114975A JP6914228B2 (en) | 2018-06-15 | 2018-06-15 | Cleaning sheet |
| JP2018-114975 | 2018-06-15 | ||
| PCT/JP2019/023751 WO2019240280A1 (en) | 2018-06-15 | 2019-06-14 | Cleaning sheet, and method for continuously producing material for cleaning sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111698935A CN111698935A (en) | 2020-09-22 |
| CN111698935B true CN111698935B (en) | 2022-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980012431.0A Active CN111698935B (en) | 2018-06-15 | 2019-06-14 | Cleaning sheet and method for continuously producing material for cleaning sheet |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111698935B (en) |
| WO (1) | WO2019240280A1 (en) |
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| CN101940456A (en) * | 2004-04-01 | 2011-01-12 | 山田千代惠 | Sheets for cleaning tools and cleaning tools |
| CN1704014A (en) * | 2004-06-03 | 2005-12-07 | 尤妮佳股份有限公司 | Cleaning sheet |
| CN102164529A (en) * | 2008-09-09 | 2011-08-24 | 山田菊夫 | cleaning cloth |
| CN102802490A (en) * | 2009-06-19 | 2012-11-28 | 尤妮佳股份有限公司 | Cleaning Sheet And Cleaning Implement |
| CN104981191A (en) * | 2013-02-07 | 2015-10-14 | 尤妮佳股份有限公司 | Cleaning tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111698935A (en) | 2020-09-22 |
| WO2019240280A1 (en) | 2019-12-19 |
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