WO2018042555A1 - 吸収性物品に係るシート状部材の製造方法、及び製造装置 - Google Patents
吸収性物品に係るシート状部材の製造方法、及び製造装置 Download PDFInfo
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- WO2018042555A1 WO2018042555A1 PCT/JP2016/075491 JP2016075491W WO2018042555A1 WO 2018042555 A1 WO2018042555 A1 WO 2018042555A1 JP 2016075491 W JP2016075491 W JP 2016075491W WO 2018042555 A1 WO2018042555 A1 WO 2018042555A1
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- Prior art keywords
- nonwoven fabric
- sheet
- hole
- composite sheet
- predetermined direction
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
- A61F13/15731—Treating webs, e.g. for giving them a fibrelike appearance, e.g. by embossing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15585—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
- A61F13/15593—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15699—Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C29/00—Finishing or dressing, of textile fabrics, not provided for in the preceding groups
Definitions
- the present invention relates to a method for manufacturing a sheet-like member and an apparatus for manufacturing absorbent articles such as disposable diapers.
- Patent Document 1 discloses that a plurality of pushing members protruding from the outer peripheral surface of a rotating roll are pushed into the continuous sheet in the thickness direction.
- a plurality of through holes h may be formed in the following composite sheet 30mf. That is, the composite sheet 30mf shown in the vertical schematic cross-sectional view of FIG. 1 is first first in the thickness direction of the first non-woven fabric 30mf1 continuous in the transport direction (direction passing through the paper surface in FIG. 1) and the composite sheet 30mf. A second non-woven fabric 30mf2 that is arranged so as to overlap the non-woven fabric 30mf1 and continues in the transport direction. In addition, between the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2, a plurality of elastic members 35a extending in the transport direction along the transport direction are arranged in the CD direction intersecting the transport direction.
- the pin member 55p is pulled out toward the non-opposing surface side 30mf1sn, and at this time, the fiber f1 clinging to the pin member 55p is pulled out together with the pin member 55p.
- a burr (return) B1 protrudes from the non-facing surface 30mf1sn of the first nonwoven fabric 30mf1 outward in the thickness direction, which is the pulling direction. And when this burr
- the objective is the non-opposing which does not oppose a 2nd nonwoven fabric among both surfaces of a 1st nonwoven fabric in order to form a through-hole to a composite sheet.
- the object is to reduce the size of the burr generated on the non-opposing surface when a pushing member such as a pin member pushed in from the surface is pulled out toward the non-opposing surface.
- the main invention for achieving the above object is: A method for producing a sheet-like member having a plurality of through holes formed from a composite sheet continuous in a predetermined direction, In a stretched state in the predetermined direction, between the first nonwoven fabric continuous in the predetermined direction and the second nonwoven fabric continuous in the predetermined direction while being arranged to overlap the first nonwoven fabric in the thickness direction of the composite sheet A plurality of elastic members along the predetermined direction are inserted in a state of being aligned in a CD direction intersecting the predetermined direction, and the composite sheet fixed to the first nonwoven fabric and the second nonwoven fabric is disposed in the predetermined direction.
- a forming step In the through-hole forming step, after the pushing member is pushed in the thickness direction from the non-facing surface that does not face the second nonwoven fabric among both surfaces of the first nonwoven fabric, the pushing member is moved toward the non-facing surface. Pull out to The non-opposing surface of the first non-woven fabric is in contact with the support surface when the constituent fibers of the first non-woven fabric are sucked and deposited on the support surface of the support member to form the first non-woven fabric. It is a manufacturing method of the sheet-like member which concerns on the absorbent article characterized by being this surface.
- An apparatus for producing a sheet-like member having a plurality of through holes formed from a composite sheet continuous in a predetermined direction In a stretched state in the predetermined direction, between the first nonwoven fabric continuous in the predetermined direction and the second nonwoven fabric continuous in the predetermined direction while being arranged to overlap the first nonwoven fabric in the thickness direction of the composite sheet
- a plurality of elastic members along the predetermined direction are inserted in a state of being aligned in a CD direction intersecting the predetermined direction, and the composite sheet fixed to the first nonwoven fabric and the second nonwoven fabric is disposed in the predetermined direction.
- a conveying device that conveys as a conveying direction; A through hole that forms the through hole penetrating in the thickness direction in the composite sheet by pushing a pressing member in the thickness direction into a position between the elastic members adjacent in the CD direction in the composite sheet. And a forming device, The through-hole forming device pushes the pushing member in the thickness direction from a non-opposing surface that does not face the second non-woven fabric among both surfaces of the first nonwoven fabric, and then pushes the pushing member toward the non-facing surface. Pull out to The non-opposing surface of the first non-woven fabric is in contact with the support surface when the constituent fibers of the first non-woven fabric are sucked and deposited on the support surface of the support member to form the first non-woven fabric. It is a manufacturing apparatus of the sheet-like member which concerns on the absorbent article characterized by being this surface.
- a pushing member such as a pin member pushed from a non-opposing surface that does not face the second non-woven fabric among both surfaces of the first non-woven fabric is pulled out toward the non-facing surface.
- the size of the burr generated on the non-facing surface can be reduced.
- FIG. 5 is a VV cross-sectional view in FIG. 4. It is the schematic plan view which looked at the ventral side belt member 31 from the non-skin side of the thickness direction. It is the schematic enlarged view which looked at the ventilation hole h which concerns on this embodiment from the non-skin side of the thickness direction.
- FIG. 10A is a schematic plan view of the continuous body 31a of the abdominal band member just before being conveyed to the abdominal thread rubber cutting step S80
- FIG. 10B is a continuation of the abdominal band member during and after passing through the step S80.
- FIG. 12 is a schematic enlarged view taken along arrow XII-XII in FIG. 11. It is a schematic side view of production
- FIG. 17B is a view taken along arrow BB in FIG. 17A.
- 18A is a schematic side view of the ventral cutter device 80
- FIG. 18B is a view taken along the line BB in FIG. 18A.
- It is a schematic side view of process S210 located in the upstream rather than the position of ventilation hole formation process S50 in a manufacturing line.
- It is a schematic side view of process S210 located in the upstream rather than the position of ventilation hole formation process S50 in a manufacturing line.
- a method for producing a sheet-like member having a plurality of through holes formed from a composite sheet continuous in a predetermined direction In a stretched state in the predetermined direction, between the first nonwoven fabric continuous in the predetermined direction and the second nonwoven fabric continuous in the predetermined direction while being arranged to overlap the first nonwoven fabric in the thickness direction of the composite sheet
- a plurality of elastic members along the predetermined direction are inserted in a state of being aligned in a CD direction intersecting the predetermined direction, and the composite sheet fixed to the first nonwoven fabric and the second nonwoven fabric is disposed in the predetermined direction.
- a forming step In the through-hole forming step, after the pushing member is pushed in the thickness direction from the non-facing surface that does not face the second nonwoven fabric among both surfaces of the first nonwoven fabric, the pushing member is moved toward the non-facing surface. Pull out to The non-opposing surface of the first non-woven fabric is in contact with the support surface when the constituent fibers of the first non-woven fabric are sucked and deposited on the support surface of the support member to form the first non-woven fabric. It is a manufacturing method of the sheet-like member which concerns on the absorbent article characterized by being this surface.
- the size of the burr that can protrude outward in the thickness direction from the non-opposing surface of the first nonwoven fabric with the formation of the through-holes. Can be small. Details are as follows. First, when the pushing member is pushed in, the fibers of the first nonwoven fabric cling to the pushing member and move to the pushing side in the thickness direction. However, when the pushing member is pulled out, the fibers clinging to the pushing member are pulled out. Move together toward the non-opposing surface.
- the fibers clinging to the pushing member at the time of pulling out protrude outward in the thickness direction from the non-opposing surface and become burrs on the non-opposing surface.
- the ease of movement of the fibers in the thickness direction varies depending on the degree of density of the fibers. That is, when the fiber distribution density (g / cm 3 ), which is the degree of density of the fibers, is low, the fibers easily move in the thickness direction, which is the pushing direction of the pushing member. It is difficult to move in the thickness direction, that is, the fiber is easy to move in the plane direction perpendicular to the thickness direction.
- the non-opposing surface of the first nonwoven fabric is the surface in contact with the support surface. Therefore, the non-opposing surface side portion has a higher fiber distribution density than the opposing surface side portion which is the opposite surface. Therefore, when pulling out the pushing member pushed into the first non-woven fabric, the fibers on the facing surface side easily move in the pulling direction together with the pushing member.
- the fibers on the non-opposing surface side are located with a high distribution density. For this reason, the fibers on the non-opposing surface side that are difficult to move in the thickness direction are prevented from moving in the pulling direction of the fibers on the facing surface side that are going to move in the thickness direction together with the pushing member. Thus, it is possible to suppress burrs from protruding from the non-facing surface.
- a method for producing a sheet-like member according to such an absorbent article is formed by sucking and depositing the constituent fibers of the second nonwoven fabric on the support surface of the support member to form the second nonwoven fabric. Further, it is desirable that the surface is in contact with the support surface.
- the size of the burr that can protrude outward in the thickness direction from the non-opposing surface of the second nonwoven fabric with the formation of the through hole is set. Can be small. Details are as follows. The pushing member is first pushed into the first non-woven fabric and then pushed into the second non-woven fabric. When pushing into the second non-woven fabric, the portion facing the first non-woven fabric is opposed to the first non-woven fabric. Do not push in the order of the part on the non-opposing surface side. That is, it is finally pushed into the part on the non-facing surface side.
- the non-opposing surface of the second non-woven fabric is the surface that is in contact with the support surface of the support member during the production of the second non-woven fabric.
- the fiber distribution density is high. Therefore, the fibers on the non-opposing surface side are difficult to move in the thickness direction that is the pushing direction, and as a result, it is possible to suppress burrs from protruding from the non-opposing surface of the second nonwoven fabric.
- the composite sheet has a fixing portion that fixes the first nonwoven fabric and the second nonwoven fabric, It is preferable that the through hole is formed in the composite sheet so that the through hole does not overlap the fixing portion.
- the composite sheet has a direct fixing portion that fixes the first nonwoven fabric and the second nonwoven fabric without the elastic member interposed therebetween, It is desirable to form the through hole in the composite sheet so that the through hole does not overlap the direct fixing portion.
- a method for producing a sheet-like member according to such an absorbent article When the surface of the first nonwoven fabric that does not come into contact with the support surface of the support member is a non-contact surface,
- a driven roller is disposed at a position upstream of the through hole forming processing position for forming the through hole in the composite sheet in the transport direction,
- the driven roller is preferably driven to rotate by obtaining rotational force from the first nonwoven fabric by contacting the non-contact surface of the first nonwoven fabric to be conveyed.
- the fibers on the non-contact surface side portion of the first nonwoven fabric are effective based on the shearing force applied by contact with the driven roller. It is relaxed. Therefore, the penetration resistance at the time of forming a through-hole in the 1st nonwoven fabric can be reduced, and it becomes easy to form a through-hole by this.
- the driven roller is a dancer roll guided so as to be movable in a predetermined direction in which the first nonwoven fabric is continuous,
- the first nonwoven fabric is looped around the dancer roll to form a loop of the first nonwoven fabric, and a predetermined load is applied to the dancer roll in the direction of increasing the loop. It is desirable.
- the above load is applied to the dancer roll. Therefore, said shear force given to a 1st nonwoven fabric based on the contact with the said dancer roll can be enlarged. And thereby, the fiber of the said non-contacting surface side part of a 1st nonwoven fabric can be loosened more effectively based on the said shear force.
- a method for producing a sheet-like member according to such an absorbent article It is desirable that the non-facing surface forms a skin side surface in the absorbent article.
- the non-opposing surface where the burr is reduced forms a skin side surface. Therefore, when it touches from the skin side, a favorable tactile sensation can be felt, and, thereby, it becomes possible to manufacture an absorbent article having a good touch.
- a method for producing a sheet-like member according to such an absorbent article It is preferable that the non-facing surface forms a non-skin side surface in the absorbent article.
- the non-facing surface where the burr is reduced forms a non-skin side surface. Therefore, when viewed from the non-skin side, the through-hole can be clearly displayed, and thus an absorbent article having a good appearance can be manufactured.
- An apparatus for producing a sheet-like member having a plurality of through holes formed from a composite sheet continuous in a predetermined direction In a stretched state in the predetermined direction, between the first nonwoven fabric continuous in the predetermined direction and the second nonwoven fabric continuous in the predetermined direction while being arranged to overlap the first nonwoven fabric in the thickness direction of the composite sheet
- a plurality of elastic members along the predetermined direction are inserted in a state of being aligned in a CD direction intersecting the predetermined direction, and the composite sheet fixed to the first nonwoven fabric and the second nonwoven fabric is disposed in the predetermined direction.
- a conveying device that conveys as a conveying direction; A through hole that forms the through hole penetrating in the thickness direction in the composite sheet by pushing a pressing member in the thickness direction into a position between the elastic members adjacent in the CD direction in the composite sheet. And a forming device, The through-hole forming device pushes the pushing member in the thickness direction from a non-opposing surface that does not face the second non-woven fabric among both surfaces of the first nonwoven fabric, and then pushes the pushing member toward the non-facing surface. Pull out to The non-opposing surface of the first non-woven fabric is in contact with the support surface when the constituent fibers of the first non-woven fabric are sucked and deposited on the support surface of the support member to form the first non-woven fabric. It is a manufacturing apparatus of the sheet-like member which concerns on the absorbent article characterized by being this surface. According to the manufacturing apparatus of the sheet-like member which concerns on such an absorbent article, there can exist an effect similar to the case of the manufacturing method mentioned above.
- FIG. 3 is a schematic perspective view of a three-piece type diaper 1 as an example of the disposable diaper 1 viewed from the ventral side in a pants-type state.
- 4 is a schematic plan view of the unfolded diaper 1 as viewed from the skin side, and
- FIG. 5 is a cross-sectional view taken along line VV in FIG.
- the diaper 1 has a vertical direction, a horizontal direction, and a front-back direction as three directions orthogonal to each other in the pants-type state of FIG.
- the upper side and the lower side in the up-and-down direction in this pant-type state are also referred to as the “trunk opening side” and the “inseam side”, respectively, and the front side and the rear side in the front-rear direction are respectively “ Also referred to as “ventral” and “dorsal”.
- the diaper 1 in the unfolded state of FIGS. 4 and 5
- the diaper 1 has a vertical direction, a horizontal direction, and a thickness direction as three directions orthogonal to each other.
- the one side and the other side in the vertical direction are also referred to as “abdominal side” and “back side”, respectively, and the one side and the other side in the thickness direction are respectively referred to as “skin”. Also referred to as “side” and “non-skin side”.
- the lateral direction has the same meaning in the pant-type state and the unfolded state.
- the vertical direction of the unfolded state is along the vertical direction of the pants-type state
- the thickness direction of the unfolded state is along the front-back direction of the pants-type state.
- this diaper 1 is a so-called three-piece type, in the developed state of FIG. 4, the diaper 1 has an absorbent main body 10 that absorbs excrement as a first part, and a ventral belt member 31 as a second part.
- a back band member 41 is provided as a third part.
- the absorbent main body 10 is stretched between the both 31 and 41 while the same absorbency.
- End portions 10ea and 10eb in the longitudinal direction of the main body 10 are joined and fixed to the nearest belt members 31 and 41, respectively, and the external shape thereof is substantially H-shaped in plan view.
- the absorbent main body 10 is folded in two with a predetermined position CL10 in the vertical direction of the absorbent main body 10 (a position corresponding to the central position CL1 of the diaper 1 in the vertical direction) as a folding position.
- the band members 31, 41 facing each other in the folded state are joined by welding or the like at the end portions 31e, 41e in the lateral direction, the band members 31, 41 are connected in a ring shape.
- the pants-type diaper 1 is formed in which the waist opening BH and the pair of leg openings LH and LH as shown in FIG. 3 are formed.
- the absorbent main body 10 has a substantially rectangular shape in plan view. And the longitudinal direction of the absorptive main body 10 is distribute
- the absorbent body 11 includes a liquid absorbent absorbent core 11c and a core wrap sheet such as tissue paper (not shown) that covers the outer peripheral surface of the core 11c.
- the absorbent core 11c is a molded body obtained by molding a predetermined liquid absorbent material into a substantially hourglass shape in plan view as an example of a predetermined shape.
- a liquid absorptive material liquid absorptive granular materials, such as liquid absorptive fibers, such as pulp fiber, and superabsorbent polymer (what is called SAP) can be illustrated.
- the top sheet 13 is a liquid-permeable sheet such as a non-woven fabric having a planar size that protrudes from the absorbent body 11 in the vertical and horizontal directions.
- the back sheet 15 is also a planar sheet that protrudes from the absorbent body 11 in the vertical direction and the horizontal direction, and an example thereof is a laminate sheet 15 having a two-layer structure as shown in FIG. That is, the laminate sheet 15 has a liquid-impermeable leak-proof sheet 15a such as a polyethylene film (PE) and a polypropylene film (PP) on the skin side, and a non-skin-made exterior sheet 15b on the non-skin side. have.
- PE polyethylene film
- PP polypropylene film
- the two sheets 13, 15 are bonded to each other in a frame shape, for example, at a portion protruding from the absorbent body 11 in the vertical direction and the horizontal direction.
- the absorptive main body 10 is formed by joining by welding or the like.
- the back sheet 15 may include only the leak-proof sheet 15a without including the exterior sheet 15b.
- leg gathers LG that extend and contract in the vertical direction may be provided in each of the portions 10 LG in the lateral direction outside the absorbent body 11 in the absorbent main body 10.
- Such leg gathers LG constitute part of the leg opening LH.
- the stretchability of the leg gather LG is given by fixing the rubber thread 16 as an elastic member in the longitudinal direction in each of the portions 10LG in the longitudinal direction.
- so-called three-dimensional gathers may be provided as leak-proof wall portions on both lateral sides of the absorbent main body 10 for the purpose of preventing side leakage.
- the ventral band member 31 is a sheet member having a substantially rectangular shape in a plan view made of nonwoven fabrics 32 and 33.
- the ventral belt member 31 is formed by joining two non-woven fabrics 32 and 33 together with a hot melt adhesive applied to a thread rubber 35 described later.
- the central portion in the lateral direction of the ventral side band member 31 is overlapped and joined to the longitudinally ventral end portion 10ea of the absorbent main body 10 from the non-skin side. .
- the back belt member 41 is a sheet member having a substantially rectangular shape in plan view using the nonwoven fabrics 42 and 43.
- 43 are joined to each other with a hot melt adhesive applied to a thread rubber 45 described later, so that the back band member 41 is formed.
- the central portion in the lateral direction of the back band member 41 is overlapped and joined to the longitudinal back side end portion 10 eb of the absorbent main body 10 from the non-skin side. .
- ventral belt member 31 The content described below is common to both the ventral belt member 31 and the back belt member 41. Therefore, here, only the ventral band member 31 will be described on behalf of both, and the back side band member 41 will only be indicated by the reference numerals of the corresponding members in parentheses.
- a plurality of thread rubbers are used as elastic members along the lateral direction.
- 35, 35... (45, 45%) Are inserted side by side in the vertical direction, and bonded and fixed to the nonwoven fabrics 32, 33 (42, 43) with a hot melt adhesive while extending in the horizontal direction. And thereby, the stretchability of the horizontal direction is provided to the ventral side belt member 31 (41).
- ventral belt member 31 (41) that overlaps the absorbent core 11c (for example, the central portion in the lateral direction)
- the rubber thread 35 (45) is discontinuous for the purpose of preventing the occurrence. And thereby, the elasticity is not provided about this part. That is, as shown in the schematic plan view of the ventral band member 31 of FIG.
- the ventral band member 31 (41) is divided into two regions AU and AD in the vertical direction,
- the region AU positioned on the waist opening BH side in the vertical direction is referred to as “upper region AU” and the region AD positioned on the crotch side is referred to as “lower region AD”
- the former upper region The absorbent core 11c of the absorbent main body 10 generally does not overlap with the AU. Therefore, the upper region AU is given stretchability over substantially the entire length in the lateral direction. That is, the upper region AU is provided with the rubber threads 35, 35... (45, 45%) Over substantially the entire length in the lateral direction.
- the absorbent core 11c of the absorbent main body 10 is overlapped with the lateral central region ADc, so that the rubber thread 35, 35.
- the absorbent core 11c does not substantially overlap the end side areas ADe, ADe located on both sides of the central area ADc, the end rubbers 35, 35... (45, 45..., And the end-side regions ADe, ADe are thus stretchable regions AH, AH having higher stretchability than the non-stretchable region AL.
- non-stretchable region AL and the stretchable region AH in the lower region AD is realized by a thread rubber continuum 35a (45a) arranged transversely across the central portion (see FIG. 10A and FIG. 10B) is cut at the center, and such cutting processing will be described later.
- examples of the fineness of the thread rubber 35 (45) include 400 dtex to 1000 dtex, and specific examples of the thread rubber 35 (45) include LYCRA (trademark). However, it is not limited to this.
- the plane size of the nonwoven fabric 32 (42) located on the non-skin side in the thickness direction of the two nonwoven fabrics 32, 33 (42, 43) is the skin side. It is set as the size which protrudes from the nonwoven fabric 33 (43) located in the vertical direction outside. And the part which protrudes in the former nonwoven fabric 32 (42) is folded inward in the vertical direction, and this folded portion 32B (42B) is the longitudinal end 33Le (43Le) of the latter nonwoven fabric 33 (43). Is not limited to this.
- the absorbent main body non-existing portion 31s (41s) is the same for the purpose of improving air permeability.
- a plurality of vent holes h (h) penetrating through the non-existing portion 31s (41s) are discretely formed in a predetermined arrangement pattern, whereby the vent holes h (h) are a group of the vent holes h.
- the ventilation hole group Gh31 (Gh41) is formed. That is, in this example, as shown in the schematic enlarged view of FIG. 7, at the position between the thread rubbers 35, 35 (45, 45) adjacent in the longitudinal direction in the absorbent main body non-existing portion 31 s (41 s), A plurality of vent holes h, h... (H, h%) Are formed side by side at a predetermined formation pitch in the lateral direction, whereby the vent holes h, h... (H, h%) A vent hole row Rh31 (Rh41) along the horizontal direction is formed. Further, the vent hole rows Rh31 and Rh31 (Rh41, Rh41) adjacent in the vertical direction are shifted from each other in the horizontal direction by a half value of the formation pitch.
- vent holes h, h... (H, h%) Form a vent hole group Gh31 (Gh41) arranged in a substantially staggered arrangement as shown in FIGS.
- the air holes h, h... (H, h%) May be formed in a lattice arrangement.
- each of the vent holes h, h... Is formed with a perfect circle having a diameter of, for example, 0.2 mm to 3 mm as a target opening shape.
- the diameter of such a non-circular vent hole h varies depending on the circumferential position of the vent hole h, and such a varying diameter is also in the range of 0.2 mm to 3 mm, for example. In. Therefore, each vent hole h can quickly exhibit the desired air permeability.
- the target opening shape of the vent hole h is not limited to the above-described perfect circle. For example, it may be a polygon such as a regular triangle or a square.
- the spunbond nonwoven fabric is used for both the two nonwoven fabrics 32 and 33 related to the ventral belt member 31 and the two nonwoven fabrics 42 and 43 related to the back belt member 41.
- the present invention is not limited to this, and another type of nonwoven fabric such as SMS (spunbond / meltblown / spunbond) nonwoven fabric may be used.
- a single fiber of polypropylene (PP) which is a representative example of a thermoplastic resin, is used as a constituent fiber of the nonwoven fabric.
- PP polypropylene
- the present invention is not limited to this.
- a single fiber of other thermoplastic resin such as polyethylene (PE) may be used, or a composite fiber such as a sheath core structure of PE and PP may be used.
- Such a diaper 1 is manufactured on a manufacturing line.
- the intermediate product 1m of the diaper 1 is transported along a predetermined transport direction (corresponding to a transport process).
- the intermediate product 1m is subjected to various processes, and the form of the intermediate product 1m changes sequentially as each process is performed. Diaper 1 is completed.
- the width direction of the production line is also referred to as “CD direction”.
- the CD direction is along the horizontal direction.
- the intermediate product 1m is transported with an arbitrary direction in a plane orthogonal to the CD direction as the transport direction. That is, the transport direction is directed in a direction defined by both a vertical up-down direction and a horizontal front-back direction.
- the “vertical direction” and “front / rear direction” referred to here are different directions that are not directly related to the “vertical direction” and “front / rear direction” used in the description of the diaper 1, respectively.
- the intermediate product 1m is transported by an appropriate transport device such as a belt conveyor or a transport roller. Therefore, unless otherwise specified, it is assumed that the intermediate product 1m is transported in the transport direction by these transport devices.
- a belt conveyor which has the endless belt which carries out a driving
- suction belt conveyor which has the adsorption function in the outer peripheral surface of an endless belt, etc. can be mentioned.
- FIG. 8 is a schematic plan view of the same line for explaining various processes performed on the production line.
- the production line includes a vent hole forming step S50 (corresponding to a through hole forming step), a slit step S60, a gap forming step S70, a ventral side rubber thread cutting step S80, a back side thread rubber cutting step S90, and an absorptivity. It has a main body attaching step S100, a bi-folding step S110, a side sealing step S120, and a cutting step S130. The positions where these steps S50 to S130 are performed are arranged in this order from the upstream side to the downstream side in the transport direction.
- FIG. 9A is a schematic plan view of the intermediate product 1m immediately before being conveyed to the vent hole forming step S50
- FIG. 9B is a schematic plan view of the intermediate product 1m just after passing through the vent hole forming step S50.
- the vent holes h, h described above are formed on the intermediate product 1m serving as the base material of both the ventral belt member 31 and the back belt member 41. ... (equivalent to a through hole) is formed.
- the intermediate product 1m is conveyed in a so-called transverse flow conveyance form. That is, the intermediate product 1m is transported in a posture in which the horizontal direction of the diaper 1 faces the transport direction and the vertical direction faces the CD direction. Therefore, as shown in FIG.
- the form of the intermediate product 1m at the time when it is sent from the upper process to the vent hole forming process S50 is generally a ventral band in which a plurality of ventral band members 31, 31,.
- a continuous body 31a of members and a continuous body 41a of back-side belt members in which a plurality of back-side belt members 41, 41,... Are continuous in the lateral direction form one sheet-like member 30mf integrally connected in the CD direction. Yes.
- the sheet-like member 30mf has a size in the CD direction corresponding to the added value of the longitudinal dimension of the nonwoven fabric 32 of the ventral belt member 31 and the longitudinal dimension of the nonwoven fabric 42 of the dorsal belt member 41.
- the nonwoven fabric 30mf1 (corresponding to the first nonwoven fabric, hereinafter also referred to as the first nonwoven fabric 30mf1) and the longitudinal dimension of the nonwoven fabric 33 of the ventral belt member 31 and the nonwoven fabric 43 of the back belt member 41
- Non-woven fabric 30mf2 (corresponding to the second non-woven fabric, hereinafter also referred to as the second non-woven fabric 30mf2) having a size in the CD direction corresponding to the added value with the dimension in the vertical direction. is doing.
- these 1st nonwoven fabrics 30mf1 and 2nd nonwoven fabrics 30mf2 are made into the state of the 2 sheets overlap
- a plurality of thread rubber continuums 35a and 45a to be the plurality of thread rubbers 35 and 45 are extended in the transport direction in the transport direction.
- the thread rubber continuums 35a and 45a are fixed to the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 by the hot melt adhesive applied to the continuums 35a and 45a.
- the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 are indirectly fixed through the thread rubber continuums 35a and 45a. Further, the first nonwoven fabric 30mf1 has a larger size in the CD direction than the second nonwoven fabric 30mf2, whereby the first nonwoven fabric 30mf1 has portions 30mf1p1 and 30mf1p2 protruding from the second nonwoven fabric 30mf2 on both sides in the CD direction. Have. Each of the protruding portions 30mf1p1 and 30mf1p2 is folded inward in the CD direction, thereby forming portions corresponding to the aforementioned folded portions 32B and 42B.
- an abdominal band member is formed in one region in the CD direction with respect to the intermediate product 1m of FIG. 9A, which is such a sheet-like member 30mf (corresponding to a composite sheet).
- a pair of vent holes Gh31, Gh31 of 31 are repeatedly formed in the transport direction at a product pitch P1
- a pair of vent holes Gh41, Gh41 of the back band member 41 are respectively formed in the transport direction in the other direction. It is repeatedly formed at the pitch P1.
- the product pitch P1 referred to here is substantially the same as the overall lengths L31 and L41 in the lateral direction of the ventral band member 31 and the back band member 41 in the unfolded state of FIG.
- the sheet-like member 30mf is divided into two in the CD direction, whereby the continuum 31a of the ventral belt member in which the thread rubber continuum 35a is in an uncut state. And a continuous body 41a of the back band member in which the continuous body 45a of the rubber thread is in an uncut state.
- the abdomen belt member continuum 31a and the back belt member continuum 41a as the intermediate product 1m are respectively moved outward in the CD direction. And thereby, between the continuous bodies 31a and 41a between CD directions, the magnitude
- the thread rubber continuous body 35a is cut in the area AL1 corresponding to the non-stretchable area AL in the continuous body 31a.
- the non-stretchable region AL is formed in the continuum 31a of the ventral band member. Details are as follows.
- the region on one side in the CD direction corresponds to the upper region AU in the ventral band member 31 described above, The region also corresponds to the lower region AD.
- the rubber thread continuum 35a is arranged in both regions in a state of extending in the transport direction along the transport direction.
- the thread rubber continuous body 35a is fixed with a hot melt adhesive over the entire length in the conveying direction, but the latter area corresponding to the lower area AD.
- the non-fixed area AL1 exists at the product pitch P1 in the transport direction and the size of the non-stretchable area AL described above in the transport direction. Therefore, as shown in the right part of FIG. 10B, when the thread rubber continuum 35a is cut at a predetermined position PC in the non-fixed area AL1, the downstream end 35aed of the thread rubber continuum 35a becomes the same continuum 35a. Detached from. Then, the upstream portion 35eu of the cut rubber thread 35 contracts toward the fixing region AH1 located on the downstream side. Further, the portion 35aedn, which has become a new downstream end portion of the thread rubber continuum 35a based on the above-described cutting, contracts toward the fixing region AH1 located on the upstream side.
- the non-fixed area AL1 is in a state where the rubber thread 35 does not exist, and as a result, the non-fixed area AL1 becomes the above-described non-stretchable area AL.
- the fixed region AH1 includes the separated thread rubber 35 and the new downstream end portion 35aedn based on the fixing with the hot melt adhesive. Since each stays, the thread rubber 35 imparts stretchability to the fixed region AH1. Thereby, the fixed area AH1 becomes the above-described stretchable area AH.
- next back-side rubber thread cutting step S90 when the continuous body 41a of the back-side belt member shown in FIG. 8 passes, a continuous thread rubber body 45a in the area AL1 corresponding to the non-stretchable area AL in the continuous body 41a.
- the non-stretchable region AL is formed in the continuum 41a of the back band member.
- the forming process of the non-stretchable area AL by this cutting is substantially the same as the above-described cutting process performed on the continuous body 31a of the ventral belt member. Therefore, the description is omitted.
- the continuous body 1Ha of the substantially ladder-shaped diaper which is the intermediate product 1m, the continuous body 31a of the ventral belt member and the continuous body 41a of the back belt member are in the thickness direction. Fold it in half so that it overlaps the top and bottom.
- the continuum 31a of the ventral band member and the continuum 41a of the dorsal band member that are vertically stacked in the two-fold process S110 correspond to the lateral ends 31e and 41e of the diaper 1.
- the side seal portion SS is formed by welding at the position, and is thereby fixed in a folded state.
- the intermediate product 1m is in the form of a continuous body 1a of a pant-type diaper in which a plurality of pant-type diapers 1, 1,.
- the continuous body 1a of the pants-type diaper as the intermediate product 1m is cut by each side seal portion SS, and thereby the pants-type diaper 1 is manufactured.
- a vent hole forming device 50 (corresponding to a through hole forming device) for forming the vent hole h in the sheet-like member 30mf is disposed.
- 11 is a schematic side view of the device 50 showing a part of the configuration (upstream roll 51 and downstream roll 58) in a longitudinal sectional view
- FIG. 12 is a schematic view taken along arrow XII-XII in FIG. It is an enlarged view.
- the vent hole forming apparatus 50 includes three rolls 51, 55, and 58 that are driven and rotated around a rotation axis along the CD direction.
- the rolls 51, 55, 58 are arranged in the order of the upstream roll 51, the intermediate roll 55, and the downstream roll 58 from the upstream side to the downstream side in the transport direction. Further, the intermediate roll 55 is disposed close to each of the rolls 51 and 58 so that both the upstream roll 51 and the downstream roll 58 are opposed to each other. Then, the sheet-like member 30mf sent as the intermediate product 1m to the vent hole forming device 50 is conveyed by a substantially ⁇ -shaped conveyance route based on the rotational operation of these three rolls 51, 55, 58. .
- the sheet-like member 30mf is conveyed on the arc-shaped first conveyance route R51 that is wound around the upstream roll 51, and then is arc-shaped second that is wound on the intermediate roll 55. It is transported on the transport route R55, and finally transported on the arc-shaped third transport route R58 that is wound around the downstream roll 58. Then, thereafter, the sheet-like member 30mf leaves the downstream roll 58 and is sent to the next slit process S60.
- the upstream roll 51 and the intermediate roll 55 are closest to each other at a predetermined position P51 in the rotation direction Dc51 of the upstream roll 51. This closest approach position P51 is from the first transport route R51 to the second transport route. This is the position to switch to R55.
- the intermediate roll 55 and the downstream roll 58 are closest to each other at a predetermined position P55 in the rotation direction Dc55 of the intermediate roll 55.
- This closest approach position P55 is from the second transport route R55 to the third transport route. This is the position to switch to R58.
- the intermediate roll 55 has a plurality of pin members 55p, 55p,.
- Each pin member 55p, 55p ... is a member whose tip end side is tapered. That is, as shown in FIG. 12, in this example, the pin member 55p has a conical portion 55pa on the tip side, and a cylindrical portion 55pb having the same diameter as the bottom surface of the conical portion 55pa on the root side. .
- the outer peripheral surface of the upstream roll 51 has holes 51h, 51h... Into which pin members 55p, 55p. That is, the hole 51h has a diameter larger than the diameter of the conical portion 55pa of the pin member 55p in the range where the pin member 55p is inserted. And in said closest approach position P51, each hole 51h is formed corresponding to each pin member 55p so that only one pin member 55p is inserted in one hole 51h.
- the closest approach position P51 is hereinafter referred to as “the vent hole forming process position P51 (the through hole forming process position). Equivalent) ”.
- the pin member 55p is not the second nonwoven fabric 30mf2 side but the second nonwoven fabric 30mf2 in the thickness direction of the sheet-like member 30mf immediately before the formation of the vent hole h. It is located on the side of one nonwoven fabric 30mf1. Therefore, when forming a ventilation hole in the sheet-like member 30mf, as shown in FIG. 2A, the surface of the pin member 55p that does not face the second nonwoven fabric 30mf2 among the both surfaces 30mf1sn and 30mf1sm of the first nonwoven fabric 30mf1. The sheet is pushed into the sheet-like member 30mf from the non-opposing surface 30mf1sn. Then, after the push-in, the pin member 55p is pulled out toward the non-facing surface 30mf1sn as shown in FIG. 2B, whereby a through hole h is formed in the sheet-like member 30mf.
- the burr B2 is formed outwardly in the thickness direction on the non-facing surface 30mf2sn that is the surface that does not face the first nonwoven fabric 30mf1 out of both surfaces 30mf2sn and 30mf2sm of the second nonwoven fabric 30mf2.
- the burr B1 protrudes outward also on the non-facing surface 30mf1sn of the first nonwoven fabric 30mf1. That is, when the pin member 55p is pushed in as shown in FIG.
- the fibers f2 of the second nonwoven fabric 30mf2 mainly cling to the pin member 55p and move to the pushing side in the thickness direction, and this is the non-woven fabric of the second nonwoven fabric 30mf2.
- the burr B2 protrudes from the facing surface 30mf2sn, but when the pin member 55p is pulled out as shown in FIG. 2B, the fibers f1 of the first non-woven fabric 30mf1 clinging to the pin member 55p are mainly non-facing surfaces 30mf1sn. Move with you.
- the fiber f1 clinging to the pin member 55p at the time of pulling out protrudes outward in the thickness direction from the non-facing surface 30mf1sn of the first non-woven fabric 30mf1, and as a result, the non-facing surface of the first non-woven fabric 30mf1
- the burr B1 protruding outward is also formed at 30 mf1 sn.
- these burrs B2 and B1 may damage the touch and appearance of the diaper 1.
- the burr B1 protruding from the non-facing surface 30mf1sn of the first nonwoven fabric 30mf1 and the burr B2 protruding from the non-facing surface 30mf2sn of the second nonwoven fabric 30mf2 are devised so as to be smaller.
- the device utilizes the fact that so-called nonwoven fabrics such as the first and second nonwoven fabrics 30mf1 and 30mf2 have anisotropy in the thickness direction. That is, utilizing the fact that the distribution density (g / cm 3 ) of the fibers of the nonwoven fabric is different between one side and the other side of the both sides of the nonwoven fabric, the anisotropy in the thickness direction is used. Is formed in the process of producing the nonwoven fabric. Therefore, the production process of the nonwoven fabric will be described before the description of this device. In addition, the production
- FIG. 13 is a schematic side view which shows production
- a suction belt conveyor 201 is used in the nonwoven fabric production step S200.
- the suction belt conveyor 201 has an endless net 202 (corresponding to a support member) that drives and circulates a circular track having a flat path along the conveyance direction. It also has a pair of rollers 204, 204 around which is wound.
- the upper surface 202s (corresponding to the support surface) of the net 202 moves along the transport direction as a flat transport path by driving rotation of at least one roller 204.
- a suction box 206 connected to a suitable negative pressure source (not shown) such as a blower is disposed inside the circulation track of the net 202, and the box 206 can be sucked from an upper opening. . Based on this suction, a suction force is generated on the upper surface 202 s of the net 202. Therefore, when the melt-spun fiber f is discharged from the nozzle 208 disposed above the upper surface 202s of the net 202, the fiber f is sucked and deposited on the upper surface 202s of the net 202.
- One nonwoven fabric 30mf1 is generally formed.
- the density of fibers increases on the upper surface 202s of the net 202, while the density of fibers decreases as the distance from the upper surface 202s increases.
- the direction in which the fibers in the vertical direction accumulate is the thickness direction of the first nonwoven fabric 30mf1.
- the first nonwoven fabric 30mf1 has an anisotropy that the distribution density of the fibers on the opposite surface 30mf1s2 (corresponding to a non-contact surface, hereinafter also referred to as a net non-contact surface 30mf1s2) decreases. Has in the direction.
- FIG. 14A and FIG. 14B as a device for reducing the burr B1 protruding from the non-facing surface 30mf1sn that does not face the second nonwoven fabric 30mf2 among the both surfaces 30mf1sn and 30mf1sm of the first nonwoven fabric 30mf1.
- the net contact surface 30mf1s1 of the both surfaces 30mf1s1 and 30mf1s2 of the first nonwoven fabric 30mf1 is associated with the non-facing surface 30mf1sn. Details are as follows.
- the non-facing surface 30mf1sn is the net contact surface 30mf1s1 of the both surfaces 30mf1s1 and 30mf1s2 of the first nonwoven fabric 30mf1 as described above. Therefore, the fiber distribution density (g / cm 3 ) is high in the portion P1sn on the non-facing surface 30mf1sn side in the thickness direction of the first nonwoven fabric 30mf1, and the fiber distribution in the portion P1sm on the opposite side 30mf1sm side on the opposite side. The density is low. More precisely, the part P1sn on the non-facing surface 30mf1sn side has a higher fiber distribution density than the part P1sm on the facing surface 30mf1sm side, which is the opposite side.
- the fibers of the portion P1sm on the facing surface 30mf1sm side easily move in the direction of pulling out together with the pin member 55p.
- the fibers of the portion P1 sn on the non-facing surface 30 mf 1 sn side are located at a high distribution density at a position on the drawing side (upper side in FIG. 14B) from the portion P 1 sm.
- the fibers in the portion P1sn on the non-facing surface 30mf1sn side that are difficult to move in the thickness direction are moved in the direction of drawing out the fibers in the portion P1sm on the facing surface 30mf1sm side that are about to move in the thickness direction together with the pin member 55p.
- the burr B1 is prevented from protruding from the non-facing surface 30mf1sn.
- the second burr B2 shown in FIG. 14A that is, the burr B2 that can protrude from the non-facing surface 30mf2sn that does not face the first nonwoven fabric 30mf1 out of both surfaces 30mf2sn and 30mf2sm of the second nonwoven fabric 30mf2 is reduced.
- the surface 30mf2s1 hereinafter referred to as the net contact
- the net contact of the two surfaces 30mf2s1 and 30mf2s2 that are in contact with the upper surface 202s of the net 202 when the second nonwoven fabric 30mf2 is generated.
- the pin member 55p is pushed into the first nonwoven fabric 30mf1 and then pushed into the second nonwoven fabric 30mf2, but when pushed into the second nonwoven fabric 30mf2, the opposing surface 30mf2sm side Part P2sm and the part P2sn on the non-facing surface 30mf2sn side are pushed in order. That is, the pin member 55p is finally pushed into the portion P2sn on the non-facing surface 30mf2sn side of the second nonwoven fabric 30mf2.
- the burr B2 protrudes outward from the non-facing surface 30mf2sn.
- the non-facing surface 30mf2sn of the second nonwoven fabric 30mf2 is the net contact surface 30mf2s1, and as described above, the fiber distribution density of the net contact surface 30mf2s1 is high. That is, the fiber distribution density of the portion P2sn on the non-facing surface 30mf2sn side is high.
- the fibers of the portion P2sn on the non-facing surface 30mf2sn side are difficult to move in the thickness direction that is the pushing direction, and as a result, the protrusion of the burr B2 from the non-facing surface 30mf2sn of the second nonwoven fabric 30mf2 is suppressed.
- the burr B2 of the non-facing surface 30mf2sn of the second nonwoven fabric 30mf2 is not a big problem, the positional relationship in the thickness direction of the second nonwoven fabric 30mf2 may be reversed. That is, the net contact surface 30mf2s1 of the second nonwoven fabric 30mf2 may be associated with the facing surface 30mf2sn of the second nonwoven fabric 30mf2.
- the non-facing surface 30mf1sn of the first nonwoven fabric 30mf1 is finally a belly in the state of the diaper 1, as can be seen by contrasting the enlarged views of the main parts of FIGS.
- the non-skin side surfaces of the side band member 31 and the back side band member 41 are formed. Therefore, reducing the burr B1 of the non-facing surface 30mf1sn as described above is effective for showing the vent hole h cleanly when the ventral belt member 31 and the back belt member 41 are viewed from the non-skin side. Contribute. Therefore, the diaper 1 having a good appearance can be manufactured. However, it is not limited to this.
- the non-facing surface 30mf1sn of the first nonwoven fabric 30mf1 may finally form the skin side surfaces of the ventral belt member 31 and the back belt member 41. And if it does in this way, reducing the burr
- the hot-melt adhesive for fixing the thread rubber continuous bodies 35a and 45a to the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 is the thread rubber continuous bodies 35a and 45a. It was applied to.
- the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 are fixed via the thread rubber continuums 35a and 45a, that is, the hot melt applied to the thread rubber continuums 35a and 45a.
- the adhesive functioned as a fixing portion for fixing the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2. Therefore, in this example, the direct fixing part for directly fixing the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 is not provided.
- the hot melt adhesive as the direct fixing portion is not applied to the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2, and the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 are directly fixed by welding. There is also no welded part for this purpose. Thus, the softness of the sheet-like member 30mf is improved.
- the vent hole h is formed at a position between the thread rubber continuums 35a, 35a (45a, 45a) in the sheet-like member 30mf. Therefore, the vent hole h is formed at a position where the hot melt adhesive as the fixing portion does not exist, that is, is formed so as not to overlap the fixing portion.
- the first nonwoven fabric 30mf1 may be used instead of or in addition to the hot-melt adhesive applied to the thread rubber continuous bodies 35a and 45a.
- the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 may be directly fixed by applying a hot melt adhesive to at least one of the second nonwoven fabric 30mf2. That is, you may provide the above-mentioned direct fixing
- the air holes h so as not to overlap the application position of the hot melt adhesive in the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2. And if it does in that way, the effect similar to the above-mentioned, ie, the effect of preventing the increase of the penetration resistance of the vent hole h, and hardening of the burr
- An example of the direct fixing part that directly fixes the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 without using the thread rubber continuous bodies 35a and 45a is not limited to the hot melt adhesive described above.
- the aforementioned welded portion that welds the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 is also included in the concept of the direct fixing portion.
- the apex angle of the conical portion 55pa of FIG. 12 is selected from a range of 20 ° to 45 °, for example, and is 36 ° in this example.
- the height of the conical portion 55pa is selected from a range of 3 mm to 8 mm, for example, and is 4.6 mm in this example.
- the edge of the hole 51h is chamfered, but the present invention is not limited to this, that is, it may not be chamfered.
- the intermediate roll 55 in FIG. 11 forms the ventilation hole groups Gh31, Gh31, Gh31, Gh31, Gh31, Gh41, Gh41, Gh41, and Gh41 for two diapers per rotation as shown in FIG. 9B.
- the circumference is a large-diameter roll having a length corresponding to approximately twice the product pitch P1 described above.
- the upstream side roll 51 of FIG. 11 has a perimeter that is substantially equivalent to the product pitch P1 so that the air hole group Gh31, Gh31, Gh41, Gh41 for one diaper of FIG. 9B can be formed per rotation. It is a small diameter roll. However, it is not limited to this.
- FIG. 15 is an explanatory diagram of an arrangement pattern of the pin members 55p on the outer circumferential surface of the intermediate roll 55
- FIG. 16 is an explanatory diagram of an arrangement pattern of the hole portions 51h on the outer circumferential surface of the upstream roll 51.
- the outer peripheral surfaces of the rolls 55 and 51 are shown on a plane. Further, in FIG. 15, a receiving portion 55 r described later is not shown for the purpose of preventing complication of the drawing.
- the pin member 55p is provided so as to correspond to the vent hole groups Gh31 and Gh41 formed in the sheet-like member 30mf described above. That is, as shown in FIG. 9B, a pair of vent holes Gh31 and Gh31 should be formed for the ventral band member 31 for each diaper in the region on one side in the CD direction of the sheet-like member 30mf.
- pin member groups G55p1 and G55p1 having a plurality of pin members 55p in the same zigzag arrangement as the vent hole group Gh31 are formed in one region in the CD direction on the outer peripheral surface of the intermediate roll 55. A pair is provided in the rotational direction Dc55.
- a pair of vent holes Gh41 and Gh41 for the back band member 41 for each diaper should be formed in the other region in the CD direction in the sheet-like member 30mf.
- a pair of pin member groups G55p2 and G55p2 having a plurality of pin members 55p with the same staggered arrangement as the vent hole group Gh41 are provided side by side in the rotation direction Dc55 in the region on the other side in the CD direction on the outer peripheral surface.
- the intermediate roll 55 forms the ventilation holes h for two diapers by one rotation, the pair of pin member groups G55p1, G55p1 (G55p2, G55p2) arranged in the rotation direction Dc55.
- the outer peripheral surface of the intermediate roll 55 has two sets of pin member group sets SG55p1, SG55p1 (SG55p2, SG55p2) are provided side by side.
- FIG. 17A shows an enlarged view of the XVIIa portion in FIG. 15, and FIG. 17B shows a view taken along arrow BB in FIG. 17A.
- a receiving portion 55r separate from the pin member 55p is formed so as to protrude at a position between adjacent pin members 55p and 55p.
- this receiving part 55r is a substantially cylindrical body which has the top surface 55rt which faced the outward of the rotation radius direction Dr55 of the intermediate roll 55 at the front-end
- the sheet-like member 30mf can be stably held as a whole at an appropriate position in the rotational radius direction Dr55 of the intermediate roll 55.
- the receiving portion 55r receives the top surface 55rt without penetrating one surface of the sheet-like member 30mf, and this also stably holds the sheet-like member 30mf in the proper position. It contributes effectively to doing.
- the receiving portions 55r are provided at four locations around the pin member 55p, respectively, thereby making it possible to reliably receive the sheet-like member 30mf. It is not limited to the above four locations. For example, when the arrangement space cannot be secured, the number may be smaller than this, and conversely, when the arrangement space can be secured, the number may be larger.
- the position of the top surface 55rt of the receiving portion 55r is located inward in the rotational radius direction Dr55 of the intermediate roll 55 from the position of the apex of the pin member 55p. This prevents the receiving portion 55r from interfering with the through-hole forming process of the vent hole h by the pin member 55p.
- the top surface 55rt of the receiving portion 55r is preferably located in the vicinity of the bottom surface of the conical portion 55pa of the pin member 55p.
- the top surface 55rt is related to the position in the rotational radius direction Dr55. It is preferable to be within a range of ⁇ 2 mm centering on the position of the bottom surface.
- the top surface 55rt coincides with the bottom surface of the conical portion 55pa. Therefore, the receiving portion 55r can reliably receive the sheet-like member 30mf without substantially interfering with the penetration formation process of the vent hole h of the pin member 55p. As a result, the pin member 55p can quickly form the vent hole h with respect to the sheet-like member 30mf.
- the top surface 55rt of the receiving portion 55r has a perfect circular shape, and the diameter thereof is selected from a range of 2 mm to 5 mm, for example, but is not limited thereto.
- it may be a polygon such as a regular triangle or a square, or may be a shape other than these.
- the hole 51h on the outer peripheral surface of the upstream roll 51 is provided in correspondence with the pin member 55p. That is, as shown in FIG. 15, a pair of pin member groups G55p1 and G55p1 are provided side by side in the rotational direction Dc55 in a region on one side in the CD direction on the outer peripheral surface of the intermediate roll 55. Thus, a pair of hole groups G51h1 and G51h1 having a plurality of hole parts 51h in a staggered arrangement are provided side by side in the rotational direction Dc51 in the region on one side in the CD direction on the outer peripheral surface of the upstream roll 51. Yes. Similarly, as shown in FIG.
- a pair of pin member groups G55p2 and G55p2 are arranged in the rotation direction Dc55 in the other region in the CD direction on the outer peripheral surface of the intermediate roll 55.
- a pair of hole groups G51h2 and G51h2 having a plurality of hole parts 51h in a staggered arrangement are provided side by side in the rotation direction Dc51. ing.
- the pair of hole groups G51h1, G51h1 (G51h2, G51h2) arranged in the rotation direction Dc51. Is one set of hole group set SG51h1 (SG51h2), only one set of such hole group set SG51h1 (SG51h2) is provided on the outer peripheral surface of the upstream roll 51.
- a heating device such as an electric heater may be built in the intermediate roll 55 shown in FIG. 11 to heat the pin member 55p of the intermediate roll 55. And if it does in this way, based on the heated pin member 55p, the thermoplastic resin fiber which is a constituent fiber of the nonwoven fabric 30mf1 and 30mf2 of the sheet-like member 30mf can be softened. Therefore, when the pin member 55p is pushed into the sheet-like member 30mf, the fibers are easily pushed away to the surroundings, and thereby the air holes h are easily formed.
- the temperature of the pin member 55p may be set to be equal to or higher than the softening point of the thermoplastic resin and lower than the melting point.
- the softening point can be determined by TMA (thermomechanical analysis) of JIS K7196 (softening temperature test method by thermomechanical analysis of thermoplastic film and sheet).
- the melting point can be obtained as a melting peak temperature in DSC (differential scanning calorimetry) of JIS K7121 (plastic transition temperature measurement method).
- the configuration of the downstream roll 58 in FIG. 11 is substantially the same as that of the upstream roll 51.
- hole groups G58h1, G58h2 having the same specifications as the hole group G51h1, G51h2 on the outer peripheral surface of the upstream roll 51 are provided on the outer peripheral surface of the downstream roll 58. Then, when the sheet-like member 30mf is received from the intermediate roll 55, the pin member 55p of the intermediate roll 55 is smoothly inserted into each hole 58h of the hole group G58h1, G58h2.
- the sheet-like member 30mf can be received without greatly changing the shape of the vent hole h formed in the sheet-like member 30mf.
- ⁇ Slit Process S60 >>> As shown in FIG. 8, in the slitting step S60, the sheet-like member 30mf sent from the vent hole forming step S50 is placed at the boundary position BL (FIG. 9B) between the one side region and the other side region in the CD direction. Divide into two. Thus, the abdominal band member continuum 31a in which the thread rubber continuum 35a is not cut and the back band member continuum 41a in which the thread rubber continuum 45a is not cut are aligned in the CD direction. (FIG. 8).
- Such a bisection process can be performed using the known slitter device 60 of FIG. That is, the apparatus 60 has, for example, a pair of upper and lower disk-shaped rotary blades, and divides the sheet-like member 30mf into two in the CD direction with the cutting edge on the outer peripheral edge of the rotary blade. 60 is well known. Therefore, further explanation is omitted.
- ⁇ Ventral thread rubber cutting step S80 >>>
- the thread rubber continuum 35a is cut, while in the fixing area AH1 corresponding to the stretchable area AH, the thread rubber continuum 35a is not cut.
- the non-stretchable region AL and the stretchable region AH are formed in the continuum 31a of the ventral band member.
- FIG. 18A is a schematic side view of the cutter device 80
- FIG. 18B is a view taken along the line BB in FIG. 18A.
- the abdominal cutter device 80 has a pair of upper and lower rolls 81u and 81d that are driven and rotated about a rotation axis along the CD direction, with the outer peripheral surfaces 81ua and 81da facing each other.
- 81da is a smooth surface to receive the cutter blades C, C.
- these rolls 81u and 81d are controlled to rotate in conjunction with the conveying operation of the abdominal band member continuous body 31a, so that the aforementioned non-fixed area AL1 corresponding to the non-expandable area AL passes therethrough.
- the back side belt member continuous body 41a sent from the interval forming step S70 is the same as described with reference to FIGS. 10A and 10B.
- the cutting process is performed. That is, the thread rubber continuum 45a is cut in the area AL1 corresponding to the non-stretchable area AL, and the thread rubber continuum 45a is not cut in the area AH1 corresponding to the stretchable area AH. Thereby, the non-stretchable region AL and the stretchable region AH are formed in the continuous body 41a of the back side band member.
- this cutting process is substantially the same as the above-described ventral rubber thread cutting step S80, and the configuration of the back-side cutter device 90 in FIG. This is the same as that of the cutter device 80 for use. Therefore, detailed description thereof is omitted here.
- FIG. 19A is a schematic side view of step S210 located on the upstream side in the transport direction from the position of vent hole forming step S50 in the production line.
- the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 are carried into the production line in the form of material coils C30mf1 and C30mf2, respectively, from the nonwoven fabric generation step S200 described with reference to FIG. .
- each material coil C30mf1 and C30mf2 is obtained by winding the first nonwoven fabric 30mf1 or the second nonwoven fabric 30mf2 in a coil shape in the continuous direction of the respective nonwoven fabrics 30mf1 and 30mf2, as shown in FIG. 19A.
- the material coils C30mf1 and C30mf2 are attached to the rotation shafts 211a and 211a of the corresponding feeding devices 211 and 211, respectively.
- the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 are respectively fed out from the material coils 30mf1, 30mf2 and conveyed along the conveying direction.
- the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 fed out from the material coils C30mf1 and C30mf2 merge at a predetermined merge position P230 in the transport direction. Further, at the merging position P230, a plurality of thread rubber continuums 35a and 45a extending in the transport direction are introduced along the transport direction between the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2. The hot rubber adhesive is applied in advance to the thread rubber continuums 35a and 45a.
- the continuums 35a and 45a are fixed to the first nonwoven fabric 30mf1 and the second nonwoven fabric 30mf2 by the hot melt adhesive, and the first nonwoven fabric 30mf1 and the second nonwoven fabric 30a and 45a via the thread rubber continuums 35a and 45a.
- the nonwoven fabric 30mf2 is fixed.
- the end portions 30mf1p1 and 30mf1p2 in the CD direction of the first nonwoven fabric 30mf1 are respectively inward in the CD direction by the well-known folding device 240 disposed downstream of the joining position P230 in the transport direction.
- the folded portions are covered with the end portions 30mf2p1 and 30mf2p2 in the CD direction of the second nonwoven fabric 30mf2 from the skin side.
- the first nonwoven fabric 30mf1 is transported from the feeding device 211 to the joining position P230 by a plurality of transport rollers 215, 215,. At least one of them may be a conveyance roller 215a having a specification as shown in FIG. 19A. That is, the conveyance roller 215a is a driven roller that is driven and rotated, and the roller 215a is a net non-contact surface 30mf1s2 of both surfaces 30mf1s1 and 30mf1s2 of the first nonwoven fabric 30mf1 (the net of the suction belt conveyor 201 in FIG. 13). It is preferable that the rotational force is obtained from the first nonwoven fabric 30mf1 by contacting the surface 30mf1s2) which does not come into contact with the upper surface 202s of the 202, and is driven to rotate.
- the fiber of the part by the side of the said net non-contact surface 30mf1s2 of the 1st nonwoven fabric 30mf1 is based on the shear force provided by contact with the conveyance roller 215a. It is further loosened. That is, the part is a part where the fiber distribution density is low and has been loosened to some extent, but this part is further loosened by contact with the transport roller 215a. Therefore, it is possible to effectively reduce the penetration resistance when the ventilation hole h is formed through the first nonwoven fabric 30mf1, thereby making it easier to form the ventilation hole h.
- the transport roller 215a is not only a driven roller as described above, but also serves as a dancer roll 215D having a dancer function as shown in FIG. 19B.
- the dancer roll 215D is used, for example, to maintain a constant tension value (N) of the first nonwoven fabric 30mf1 fed from the feeding device 211, and is described in detail as follows.
- the dancer roll 215D can reciprocate in a predetermined direction (vertical direction in the example of FIG. 19B) in which the first nonwoven fabric 30mf1 is continuous at a position between the pair of fixed position rolls 215S and 215S rotating at a fixed position. It is guided to.
- a loop LP of the first nonwoven fabric 30mf1 is formed by the first nonwoven fabric 30mf1 being wound around the pair of fixed position rolls 215S and 215S and the dancer roll 215D, and the dancer roll 215D includes an air cylinder.
- a predetermined load RD is applied in a direction in which the loop LP increases in the predetermined direction by an appropriate load applying device (not shown) such as a weight or a weight.
- an appropriate load applying device such as a weight or a weight.
- the position of the dancer roll 215D in the predetermined direction is measured by an appropriate sensor (not shown), and an appropriate controller (not shown) such as a sequencer is based on a measurement signal output from the sensor.
- the rotational speed value (mpm) of the rotating shaft 211a of the feeding device 211 is controlled.
- the controller increases the rotational speed value (mpm) of the rotating shaft 211a.
- the rotational speed value (mpm) of the rotating shaft 211a is decreased.
- the tension value of the first nonwoven fabric 30mf1 fed from the feeding device 211 is maintained constant.
- the transport roller 215a also serves as the dancer roll 215D as described above
- a predetermined value load RD is applied to the dancer roll 215D in the direction in which the loop LP increases as described above. Therefore, the above-described shearing force applied to the first nonwoven fabric 30mf1 based on the contact with the dancer roll 215D can be increased by the effect of the load RD. And thereby, the fiber of the part by the side of the above-mentioned net non-contact side 30mf1s2 of the 1st nonwoven fabric 30mf1 can be loosened more effectively based on the shear force concerned.
- the transport roller 215a having the above-described function may be provided in the transport path between the feeding device 211 of the second nonwoven fabric 30mf2 and the joining position P230. That is, at least one of the transport rollers 215, 215,... In the transport path may be the transport roller 215a having the above-described function. And in that case, although this conveyance roller 215a is also a driven roller, about the said roller 215a, it is the net
- the rotational force is obtained from the second non-woven fabric 30mf2 and driven rotation.
- the conveyance roller 215a for the second nonwoven fabric 30mf2 is not only a driven roller as described above, but may also serve as a dancer roll 215D having a dancer function as shown in FIG. 19B.
- this content it is thought that it can be easily conceived from the above-mentioned content about the first nonwoven fabric 30mf1. For this reason, the same or similar components are denoted by the same reference numerals, and further description thereof is omitted.
- the thread rubber continuums 35a and 45a are illustrated as an example of the continuous elastic member, but the present invention is not limited thereto.
- a continuous rubber band may be used.
- the pin member 55p of the intermediate roll 55 has the conical part 55pa and the cylindrical part 55pb, but this is not limitative.
- a conical portion 55pa a conical portion having a polygonal section such as a triangular pyramid or a quadrangular pyramid may be provided. You may do it.
- the sheet-like member 30mf as the intermediate product 1m is wound around the upstream roll 51 and the intermediate roll 55 of the vent hole forming apparatus 50 in the vent hole forming step S50 as shown in FIG. Not limited to this. That is, the sheet-like member 30mf may be passed between the rolls 51 and 55 without being wound around either the upstream roll 51 or the intermediate roll 55.
- the 3 piece type disposable diaper 1 was illustrated as an example of an absorbent article, it is not restricted to this at all.
- the sheet-like member used as the material of a 2 piece type disposable diaper you may apply the manufacturing method and manufacturing apparatus of the sheet-like member of this invention.
- the two-piece type disposable diaper has, for example, an exterior sheet having an abdominal side, a crotch part, and a back side as a first component, and is fixed to the skin side surface of the exterior sheet. Is a type of diaper having a second part.
- the two-piece diaper may be a so-called tape-type disposable diaper.
- the tape-type disposable diaper is a type that uses a fastening tape to connect the abdomen side part covering the wearer's torso from the abdomen side and the back side part covering the abdomen part from the back side. It is a diaper.
- the absorbent article is not limited to the disposable diaper 1.
- the manufacturing method and manufacturing apparatus of the sheet-like member of the present invention are applicable in the manufacture. Therefore, the concept of the absorbent article includes a urine absorbing pad and a sanitary napkin.
- 1 disposable diapers 1a diaper continuum, 1Ha continuum diaper continuum, 1m intermediate product, 10 Absorbent body, 10LG part, 10ea end, 10eb end, 11 Absorber, 11c Absorbent core, 13 Top sheet, 15 Back sheet, 15a leakage prevention sheet, 15b exterior sheet, 16 Rubber thread, 30 mf sheet-like member (composite sheet), 30 mfe end, 30mf1 first nonwoven fabric, 30mf1p1 part, 30mf1p2 part, 30mf1sn non-facing surface, 30mf1sm facing surface, 30mf1s1 Net contact surface (surface that contacts), 30mf1s2 Net non-contact surface (non-contact surface, reverse surface, non-contact surface), 30mf2 second nonwoven fabric, 30mf2sn non-facing surface, 30mf1sm facing surface, 30mf2s1 net contact surface (surface on contact), 30mf2s2 Net non-contact surface (surface that does not contact), 31
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Abstract
Description
所定方向に連続する複合シートから複数の貫通孔が形成されたシート状部材を製造する方法であって、
前記所定方向に連続する第1不織布と、前記複合シートの厚さ方向に前記第1不織布に重なって配されつつ前記所定方向に連続する第2不織布との間に、前記所定方向に伸長状態で前記所定方向に沿った複数の弾性部材が、前記所定方向と交差するCD方向に並んだ状態で介挿されて前記第1不織布及び前記第2不織布に固定された前記複合シートを、前記所定方向を搬送方向として搬送する搬送工程と、
前記複合シートにおいて前記CD方向に隣り合う前記弾性部材同士の間の位置に前記厚さ方向に押し込み部材を押し込むことにより、前記複合シートに前記厚さ方向に貫通する前記貫通孔を形成する貫通孔形成工程と、を有し、
前記貫通孔形成工程では、前記第1不織布の両面のうちで前記第2不織布と対向しない非対向面から前記押し込み部材を前記厚さ方向に押し込んだ後に、前記押し込み部材を前記非対向面の方へ引き抜いていき、
前記第1不織布の前記非対向面は、前記第1不織布を生成すべく前記第1不織布の構成繊維を支持部材の支持面に吸引して堆積させた際に、前記支持面に当接した方の面であることを特徴とする吸収性物品に係るシート状部材の製造方法である。
所定方向に連続する複合シートから複数の貫通孔が形成されたシート状部材を製造する装置であって、
前記所定方向に連続する第1不織布と、前記複合シートの厚さ方向に前記第1不織布に重なって配されつつ前記所定方向に連続する第2不織布との間に、前記所定方向に伸長状態で前記所定方向に沿った複数の弾性部材が、前記所定方向と交差するCD方向に並んだ状態で介挿されて前記第1不織布及び前記第2不織布に固定された前記複合シートを、前記所定方向を搬送方向として搬送する搬送装置と、
前記複合シートにおいて前記CD方向に隣り合う前記弾性部材同士の間の位置に前記厚さ方向に押し込み部材を押し込むことにより、前記複合シートに前記厚さ方向に貫通する前記貫通孔を形成する貫通孔形成装置と、を有し、
前記貫通孔形成装置は、前記第1不織布の両面のうちで前記第2不織布と対向しない非対向面から前記押し込み部材を前記厚さ方向に押し込んだ後に、前記押し込み部材を前記非対向面の方へ引き抜いていき、
前記第1不織布の前記非対向面は、前記第1不織布を生成すべく前記第1不織布の構成繊維を支持部材の支持面に吸引して堆積させた際に、前記支持面に当接した方の面であることを特徴とする吸収性物品に係るシート状部材の製造装置である。
本発明の他の特徴については、本明細書及び添付図面の記載により明らかにする。
所定方向に連続する複合シートから複数の貫通孔が形成されたシート状部材を製造する方法であって、
前記所定方向に連続する第1不織布と、前記複合シートの厚さ方向に前記第1不織布に重なって配されつつ前記所定方向に連続する第2不織布との間に、前記所定方向に伸長状態で前記所定方向に沿った複数の弾性部材が、前記所定方向と交差するCD方向に並んだ状態で介挿されて前記第1不織布及び前記第2不織布に固定された前記複合シートを、前記所定方向を搬送方向として搬送する搬送工程と、
前記複合シートにおいて前記CD方向に隣り合う前記弾性部材同士の間の位置に前記厚さ方向に押し込み部材を押し込むことにより、前記複合シートに前記厚さ方向に貫通する前記貫通孔を形成する貫通孔形成工程と、を有し、
前記貫通孔形成工程では、前記第1不織布の両面のうちで前記第2不織布と対向しない非対向面から前記押し込み部材を前記厚さ方向に押し込んだ後に、前記押し込み部材を前記非対向面の方へ引き抜いていき、
前記第1不織布の前記非対向面は、前記第1不織布を生成すべく前記第1不織布の構成繊維を支持部材の支持面に吸引して堆積させた際に、前記支持面に当接した方の面であることを特徴とする吸収性物品に係るシート状部材の製造方法である。
前記第2不織布の両面のうちで前記第1不織布と対向しない非対向面は、前記第2不織布を生成すべく前記第2不織布の構成繊維を支持部材の支持面に吸引して堆積させた際に、前記支持面に当接した方の面であるのが望ましい。
前記複合シートは、前記第1不織布と前記第2不織布とを固定する固定部を有し、
前記貫通孔が前記固定部に重ならないように前記複合シートに前記貫通孔を形成するのが望ましい。
前記複合シートは、前記弾性部材を介さずに前記第1不織布と前記第2不織布とを固定する直接固定部を有し、
前記貫通孔が前記直接固定部に重ならないように前記複合シートに前記貫通孔を形成するのが望ましい。
前記第1不織布の両面のうちで前記支持部材の前記支持面と当接しない方の面を非当接面とした場合に、
前記貫通孔形成工程において前記複合シートに前記貫通孔を形成する貫通孔形成処理位置よりも前記搬送方向の上流側の位置には、従動ローラーが配置されており、
前記従動ローラーは、搬送される前記第1不織布の前記非当接面と接触することにより、前記第1不織布から回転力を得て従動回転するのが望ましい。
前記従動ローラーは、前記第1不織布が連続する所定方向に移動可能に案内されたダンサーロールであり、
前記ダンサーロールに前記第1不織布が掛け回されることによって前記第1不織布のループが形成されているとともに、前記ダンサーロールには、所定値の荷重が、前記ループが大きくなる方向に付与されているのが望ましい。
前記非対向面は、前記吸収性物品において肌側面を形成するのが望ましい。
前記非対向面は、前記吸収性物品において非肌側面を形成するのが望ましい。
所定方向に連続する複合シートから複数の貫通孔が形成されたシート状部材を製造する装置であって、
前記所定方向に連続する第1不織布と、前記複合シートの厚さ方向に前記第1不織布に重なって配されつつ前記所定方向に連続する第2不織布との間に、前記所定方向に伸長状態で前記所定方向に沿った複数の弾性部材が、前記所定方向と交差するCD方向に並んだ状態で介挿されて前記第1不織布及び前記第2不織布に固定された前記複合シートを、前記所定方向を搬送方向として搬送する搬送装置と、
前記複合シートにおいて前記CD方向に隣り合う前記弾性部材同士の間の位置に前記厚さ方向に押し込み部材を押し込むことにより、前記複合シートに前記厚さ方向に貫通する前記貫通孔を形成する貫通孔形成装置と、を有し、
前記貫通孔形成装置は、前記第1不織布の両面のうちで前記第2不織布と対向しない非対向面から前記押し込み部材を前記厚さ方向に押し込んだ後に、前記押し込み部材を前記非対向面の方へ引き抜いていき、
前記第1不織布の前記非対向面は、前記第1不織布を生成すべく前記第1不織布の構成繊維を支持部材の支持面に吸引して堆積させた際に、前記支持面に当接した方の面であることを特徴とする吸収性物品に係るシート状部材の製造装置である。
このような吸収性物品に係るシート状部材の製造装置によれば、前述した製造方法の場合と同様の作用効果を奏することができる。
本実施形態の吸収性物品に係るシート状部材の製造方法及び製造装置は、例えば、吸収性物品の一例としての使い捨ておむつ1の製造ラインで使用される。図3は、使い捨ておむつ1の一例としての3ピースタイプのおむつ1をパンツ型状態において腹側から見た概略斜視図である。また、図4は、展開状態のおむつ1を肌側から見た概略平面図であり、図5は、図4中のV-V断面図である。
一方、図4及び図5の展開状態においては、おむつ1は、互いに直交する三方向として縦方向と横方向と厚さ方向とを有している。そして、以下では、この展開状態において縦方向の一方側及び他方側のことをそれぞれ「腹側」及び「背側」とも言い、また、厚さ方向の一方側及び他方側のことをそれぞれ「肌側」及び「非肌側」とも言う。
ちなみに、横方向については、パンツ型状態と展開状態とで互いに同じ意味である。また、展開状態の縦方向は、パンツ型状態の上下方向に沿っているとともに、展開状態の厚さ方向は、パンツ型状態の前後方向に沿っている。
更に、図4及び図5の展開状態では、おむつ1に伸縮性を付与するための後述の弾性部材たる糸ゴム16,35,45による収縮力が全く無いものと仮想して広がった状態のおむつ1を示している。
そして、この略H形状の展開状態から、吸収性本体10の縦方向の所定位置CL10(縦方向におけるおむつ1の中央位置CL1に相当する位置)を折り位置として同吸収性本体10が二つ折りされるとともに、この二つ折りの状態において互いに対向する帯部材31,41同士が横方向の各端部31e,41eにて溶着等で接合されると、これら帯部材31,41同士が環状に繋がって、これにより、図3に示すような胴回り開口BH及び一対の脚回り開口LH,LHが形成されたパンツ型状態のおむつ1となる。
そして、これらトップシート13とバックシート15との間に吸収体11を挟んだ状態において、吸収体11から縦方向及び横方向に突出した部分でこれら両シート13,15同士が例えば額縁状に接着や溶着等で接合されることにより、吸収性本体10が形成されている。なお、バックシート15は、外装シート15bを有さずに、防漏シート15aだけを有していても良い。
すなわち、図6の腹側帯部材31を厚さ方向の非肌側から見た概略平面図に示すように、腹側帯部材31(41)を、縦方向に二つの領域AU,ADに区分し、そして、縦方向において胴回り開口BH側に位置する領域AUのことを「上部領域AU」と言い、股下側に位置する領域ADのことを「下部領域AD」と言った場合に、前者の上部領域AUには、吸収性本体10の吸収性コア11cが概ね重なっていない。そのため、当該上部領域AUには、横方向の略全長に亘って伸縮性が付与されている。すなわち、当該上部領域AUには、横方向の略全長に亘って糸ゴム35,35…(45,45…)が設けられている。
よって、図10Bの右部に示すように、この非固定領域AL1の所定位置PCで糸ゴムの連続体35aを切断すると、糸ゴムの連続体35aにおける下流側の端部35aedが同連続体35aから切り離される。すると、切り離された糸ゴム35における上流側の部分35euが、その下流側に位置する固定領域AH1の方へと収縮する。また、上記の切断に基づいて糸ゴムの連続体35aにおける新たな下流側の端部となった部分35aednは、その上流側に位置する固定領域AH1の方へ収縮する。そして、これにより、図10Bの左部に示すように、非固定領域AL1は、糸ゴム35が存在しない状態となって、結果、当該非固定領域AL1が、前述の非伸縮領域ALとなる。一方、同図10Bに示すように、固定領域AH1には、ホットメルト接着剤での固定に基づいて、上記の切り離された糸ゴム35及び上記新たな下流側の端部となった部分35aednがそれぞれ留まるので、当該糸ゴム35によって当該固定領域AH1には伸縮性が付与される。そして、これにより、当該固定領域AH1は、前述の伸縮領域AHとなる。
通気孔形成工程S50には、シート状部材30mfに通気孔hを形成する通気孔形成装置50(貫通孔形成装置に相当)が配置されている。図11は、一部の構成(上流側ロール51及び下流側ロール58)を縦断面視で示す同装置50の概略側面図であり、図12は、図11中のXII-XII矢視の概略拡大図である。
図11に示すように、通気孔形成装置50は、CD方向に沿った回転軸回りに駆動回転する3本のロール51,55,58を有する。すなわち、搬送方向の上流側から下流側へと、上流側ロール51、中間ロール55、及び下流側ロール58の順番で各ロール51,55,58が並んで配置されている。また、中間ロール55は、上流側ロール51及び下流側ロール58の両者と、互いの外周面が対向するように各ロール51,58に近接配置されている。そして、通気孔形成装置50へ中間製品1mとして送られた上記のシート状部材30mfは、これら3本のロール51,55,58の回転動作に基づいて、略Ω形状の搬送ルートで搬送される。すなわち、先ず、シート状部材30mfは、当該上流側ロール51に巻き付いた状態となる円弧状の第1搬送ルートR51で搬送され、次に、中間ロール55に巻き付いた状態となる円弧状の第2搬送ルートR55で搬送され、最後に、下流側ロール58に巻き付いた状態となる円弧状の第3搬送ルートR58で搬送される。そして、しかる後に、シート状部材30mfは、下流側ロール58から離れて次工程のスリット工程S60へと送出される。
なお、上流側ロール51と中間ロール55とは、上流側ロール51の回転方向Dc51における所定位置P51で最接近しているが、この最接近位置P51が、第1搬送ルートR51から第2搬送ルートR55へと切り替わる位置である。同様に、中間ロール55と下流側ロール58とは、中間ロール55の回転方向Dc55における所定位置P55で最接近しているが、この最接近位置P55が、第2搬送ルートR55から第3搬送ルートR58へと切り替わる位置である。
すなわち、図2Aのようにピン部材55pを押し込む際には、主に第2不織布30mf2の繊維f2がピン部材55pにまとわりついて厚さ方向の押し込み側に移動して、これが第2不織布30mf2の非対向面30mf2snから突出してバリB2となるが、図2Bのようにピン部材55pを引き抜く際にも、ピン部材55pにまとわりついた主に第1不織布30mf1の繊維f1が、引き抜く方向たる非対向面30mf1snの方へと一緒に移動する。そのため、当該引き抜く際にピン部材55pにまとわりついていた繊維f1が、第1不織布30mf1の非対向面30mf1snから厚さ方向の外方に突出して、その結果、上記の第1不織布30mf1の非対向面30mf1snにも、外方に突出したバリB1が形成されることとなる。但し、これらのバリB2,B1は、おむつ1の肌触りや外観を損ねる恐れがある。
また、ネット202の周回軌道の内側には、ブロワ等の適宜な負圧源(不図示)に連結されたサクションボックス206が配置されていて、同ボックス206は、上部の開口から吸引可能である。そして、この吸引に基づいてネット202の上面202sには吸引力が生じている。よって、ネット202の上面202sよりも上方に配されたノズル208から、溶融紡糸された繊維fが吐出されると、当該繊維fがネット202の上面202sに吸引されて堆積し、その結果、第1不織布30mf1が概ね成形される。
そのため、第1不織布30mf1の厚さ方向において非対向面30mf1sn側の部分P1snでは、繊維の分布密度(g/cm3)が高く、その逆側の対向面30mf1sm側の部分P1smでは、繊維の分布密度が低くなっている。より正確には、当該非対向面30mf1sn側の部分P1snの方が、逆側の面たる対向面30mf1sm側の部分P1smよりも繊維の分布密度が高くなっている。よって、同図14Bに示すように、第1不織布30mf1に押し込んだピン部材55pを引き抜く際に、対向面30mf1sm側の部分P1smの繊維がピン部材55pと一緒に引き抜く方向に移動し易いが、ここで、当該部分P1smよりも引き抜き側(図14Bでは上側)の位置には、非対向面30mf1sn側の部分P1snの繊維が高い分布密度で位置している。そのため、この厚さ方向に移動し難い非対向面30mf1sn側の部分P1snの繊維が、ピン部材55pと一緒に厚さ方向に移動しようとする対向面30mf1sm側の部分P1smの繊維の引き抜く方向への移動を有効に阻止して、これにより、非対向面30mf1snからバリB1が突出することが抑制される。
すなわち、第2不織布30mf2の非対向面30mf2snに対しても、第2不織布30mf2を生成する際の両面30mf2s1,30mf2s2のうちでネット202の上面202sに当接した方の面30mf2s1(以下、ネット当接面30mf2s1とも言う)を対応付けている。そして、このようにしていれば、次のようにして、非対向面30mf2snからのバリB2の突出が抑制される。
先ず、同図14Aに示すように、ピン部材55pは第1不織布30mf1に押し込まれ、しかる後に第2不織布30mf2に押し込まれるが、この第2不織布30mf2への押し込みの際には、対向面30mf2sm側の部分P2sm、非対向面30mf2sn側の部分P2snの順番で押し込まれる。すなわち、第2不織布30mf2の非対向面30mf2sn側の部分P2snにはピン部材55pが最後に押し込まれる。そして、このとき、ピン部材55pにまとわりついた繊維が一緒に押し込み方向に移動すると、非対向面30mf2snから外方にバリB2が突出形成される。
しかし、ここで、第2不織布30mf2の非対向面30mf2snは、上記のネット当接面30mf2s1であり、前述したことから、当該ネット当接面30mf2s1の繊維の分布密度は高くなっている。つまり、上記の非対向面30mf2sn側の部分P2snの繊維の分布密度は高くなっている。よって、この非対向面30mf2sn側の部分P2snの繊維は、押し込み方向たる厚さ方向に移動し難く、その結果、第2不織布30mf2の非対向面30mf2snからのバリB2の突出が抑制される。
但し、何等これに限らない。すなわち、第1不織布30mf1の非対向面30mf1snが、最終的に腹側帯部材31及び背側帯部材41の肌側面を形成するようにしても良い。そして、このようにすれば、上述のようにして非対向面30mf1snのバリB1を小さくすることは、腹側帯部材31及び背側帯部材41に肌側から触れた際に良好な触感を感じさせることに有効に寄与する。よって、肌触りの良好なおむつ1を製造可能となる。
図8に示すように、スリット工程S60では、上記の通気孔形成工程S50から送られるシート状部材30mfを、CD方向の一方側の領域と他方側の領域との境界位置BL(図9B)において二分割する。そして、これにより、糸ゴムの連続体35aが未切断状態の腹側帯部材の連続体31aと、糸ゴムの連続体45aが未切断状態の背側帯部材の連続体41aとが、CD方向に並んだ状態で生成される(図8)。
図8に示すように、間隔形成工程S70では、上記のスリット工程S60から送られる腹側帯部材の連続体31aと背側帯部材の連続体41aとを、それぞれ、CD方向の外側にそれぞれ移動して、これにより、これら連続体31a,41a同士のCD方向の間に、図4の展開形状のおむつ1における腹側帯部材31と背側帯部材41との間の縦方向の間隔Ldに相当する大きさの間隔を形成する。
腹側糸ゴム切断工程S80においては、上記の間隔形成工程S70から送られる図10Aの腹側帯部材の連続体31aに対して、図10Bに示すように、非伸縮領域ALに対応する非固定領域AL1では、糸ゴムの連続体35aを切断する一方、伸縮領域AHに対応する固定領域AH1では、糸ゴムの連続体35aを切断しない。そして、これにより、腹側帯部材の連続体31aに非伸縮領域ALと伸縮領域AHとが形成される。なお、非伸縮領域ALに対応する領域AL1は、搬送方向におむつ1の製品ピッチP1で現れる。よって、かかる切断処理は、腹側帯部材の連続体31aに対しておむつ1の製品ピッチP1で行われる。
<<<背側糸ゴム切断工程S90>>>
図8に示すように、背側糸ゴム切断工程S90においては、同じく間隔形成工程S70から送られる背側帯部材の連続体41aに対して、図10A及び図10Bを参照して説明したのと同様の切断処理を行う。すなわち、非伸縮領域ALに対応する領域AL1では、糸ゴムの連続体45aを切断し、伸縮領域AHに対応する領域AH1では、糸ゴムの連続体45aを切断しない。そして、これにより、背側帯部材の連続体41aに非伸縮領域ALと伸縮領域AHとが形成される。なお、上述からわかるように、かかる切断処理は、前述の腹側糸ゴム切断工程S80と概ね同じであり、また、当該切断処理を行う図8の背側用カッター装置90の構成も、腹側用カッター装置80のそれと同じである。そのため、ここでは、その詳細な説明については省略する。
吸収性本体取り付け工程S200においては、図8に示すように、上記の各糸ゴム切断工程S80,S90から中間製品1mとして送られる各帯部材の連続体31a,41a同士に、不図示の別工程で生成された単票状の吸収性本体10を掛け渡して固定し、これにより、中間製品1mを、図4の略H形状に展開されたおむつ1H,1H…が連続してなる略梯子状のおむつの連続体1Haの形態にする。
上述の本実施形態の説明では、通気孔形成工程S50及びその下流側に位置する各工程S60~S130についてだけ述べ、それよりも上流側に位置する工程S210については述べていなかった。そのため、以下では、当該上流側の工程S210について説明する。
そして、以上をもって、前述の図9Aのような通気孔形成工程S50へ送られる直前の状態のシート状部材30mfが生成される。
先ず、ダンサーロール215Dは、定位置で回転する一対の定位置ロール215S,215S同士の間の位置で、第1不織布30mf1が連続する所定方向(図19Bの例では、上下方向)に往復移動可能に案内されている。そして、これら一対の定位置ロール215S,215S及びダンサーロール215Dに第1不織布30mf1が掛け回されることによって、第1不織布30mf1のループLPが形成されているとともに、ダンサーロール215Dには、エアシリンダーや錘等の適宜な荷重付与装置(不図示)によって、所定値の荷重RDが上記所定方向においてループLPが大きくなる方向に付与されている。また、上記所定方向におけるダンサーロール215Dの位置は、適宜なセンサー(不図示)で計測されていて、当該センサーから出力される計測信号に基づいて、シーケンサー等の適宜なコントローラ(不図示)が、繰り出し装置211の回転軸211aの回転速度値(mpm)を制御する。すなわち、計測信号が、「ループLPの大きさが目標値よりも小さくなっている」旨を示している場合には、同コントローラは、回転軸211aの回転速度値(mpm)を大きくする一方、同計測信号が、「ループLPの大きさが目標値よりも大きくなっている」旨を示している場合には、回転軸211aの回転速度値(mpm)を小さくする。そして、これにより、繰り出し装置211から繰り出される第1不織布30mf1の張力値が一定に維持される。
更には、第2不織布30mf2用の当該搬送ローラー215aが、上述のような従動ローラーであるだけでなく、図19Bの如きダンサー機能を有したダンサーロール215Dを兼ねていても良い。なお、この内容については、第1不織布30mf1についての既述の内容から容易に想到可能と考えられる。そのため、同一又は類似の構成については同じ符号を付して、これ以上の説明については省略する。
以上、本発明の実施形態について説明したが、上記の実施形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。また、本発明は、その趣旨を逸脱することなく、変更や改良され得るとともに、本発明にはその等価物が含まれるのはいうまでもない。例えば、以下に示すような変形が可能である。
更に言えば、この2ピースタイプのおむつが、所謂テープ式の使い捨ておむつであっても良い。なお、テープ式の使い捨ておむつとは、着用者の胴部を腹側から覆う上記腹側部と、同胴部を背側から覆う上記背側部とを連結するのに、ファスニングテープを用いるタイプのおむつのことである。
また、更に言えば、吸収性物品は、何等使い捨ておむつ1に限らない。すなわち、不織布を材料として製造される吸収性物品であれば、その製造の際に、本発明のシート状部材の製造方法及び製造装置を適用可能である。そのため、この吸収性物品の概念には、尿取りパッドや生理用ナプキン等も含まれる。
1a おむつの連続体、1Ha 略梯子状のおむつの連続体、
1m 中間製品、
10 吸収性本体、
10LG 部分、10ea 端部、10eb 端部、
11 吸収体、11c 吸収性コア、
13 トップシート、15 バックシート、
15a 防漏シート、15b 外装シート、
16 糸ゴム、
30mf シート状部材(複合シート)、30mfe 端部、
30mf1 第1不織布、
30mf1p1 部分、30mf1p2 部分、
30mf1sn 非対向面、30mf1sm 対向面、
30mf1s1 ネット当接面(当接した方の面)、
30mf1s2 ネット非当接面(非当接面、逆側の面、当接しない方の面)、
30mf2 第2不織布、
30mf2sn 非対向面、30mf1sm 対向面、
30mf2s1 ネット当接面(当接した方の面)、
30mf2s2 ネット非当接面(当接しない方の面)、
31 腹側帯部材、31e 端部、
31s 吸収性本体非存在部分、
31a 腹側帯部材の連続体、
32 不織布、32B 折り返し部、
33 不織布、33Le 端部、
35 糸ゴム(弾性部材)、35eu 部分、
35a 糸ゴムの連続体(弾性部材)、35aed 端部、35aedn 部分、
41 背側帯部材、41a 背側帯部材の連続体、
42 不織布、42Le 端部、
43 不織布、43B 折り返し部、
45 糸ゴム(弾性部材)、
45a 糸ゴムの連続体(弾性部材)、
50 通気孔形成装置(貫通孔形成装置)、
51 上流側ロール、51h 穴部、
55 中間ロール、
55p ピン部材(押し込み部材)、55pa 円錐部、55pb 円柱部、
55r 受け部、55rt 頂面、
58 下流側ロール、58h 穴部、
60 スリッター装置、
80 腹側用カッター装置、
81u カッターロール、81ua 外周面、
81d アンビルロール、81da 外周面、
84 カッターブロック、
90 背側用カッター装置、
201 サクションベルトコンベア、202 ネット(支持部材)、
202s 上面(支持面)、204 ローラー、206 サクションボックス、
208 ノズル、
211 繰り出し装置、211a 回転軸、
215 搬送ローラー、215a 搬送ローラー(従動ローラー)、
215D ダンサーロール、215S 定位置ロール、
240 折り返し装置、
h 通気孔(貫通孔)、C カッター刃、B1 バリ、B2 バリ、
f 繊維、f1 繊維、f2 繊維、
AH 伸縮領域、AH1 固定領域、
AL 非伸縮領域、AL1 非固定領域、
AU 上部領域、AD 下部領域、ADc 中央領域、ADe 端側領域、
BH 胴回り開口、LH 脚回り開口、LG レッグギャザー、
CL1 中央位置、CL10 所定位置、
SS サイドシール部、
PC 所定位置、TC 痕跡、
BL 境界位置、LP ループ、
P1sm 部分、P1sn 部分、P2sm 部分、P2sn 部分、
PC 所定位置、f1 繊維
C30mf1 資材コイル、C30mf2 資材コイル、
Gh31 通気孔群、Rh31 通気孔列、
Gh41 通気孔群、Rh41 通気孔列、
G51h1 穴部群、G51h2 穴部群、
G55p1 ピン部材群、G55p2 ピン部材群、
G58h1 穴部群、G58h2 穴部群、
SG51h1 穴部群セット、SG51h2 穴部群セット、
SG55p1 ピン部材群セット、SG55p2 ピン部材群セット、
R51 第1搬送ルート、R55 第2搬送ルート、R58 第3搬送ルート、
P51 最接近位置(通気孔形成処理位置、貫通孔形成処理位置)、P55 最接近位置、
P230 合流位置、
S50 通気孔形成工程(貫通孔形成工程)、
S60 スリット工程、
S70 間隔形成工程、
S80 腹側糸ゴム切断工程、
S90 背側糸ゴム切断工程、
S100 吸収性本体取り付け工程、
S110 二つ折り工程、
S120 サイドシール工程、
S130 切断工程、
S200 不織布の生成工程、
S210 上流側に位置する工程、
Claims (9)
- 所定方向に連続する複合シートから複数の貫通孔が形成されたシート状部材を製造する方法であって、
前記所定方向に連続する第1不織布と、前記複合シートの厚さ方向に前記第1不織布に重なって配されつつ前記所定方向に連続する第2不織布との間に、前記所定方向に伸長状態で前記所定方向に沿った複数の弾性部材が、前記所定方向と交差するCD方向に並んだ状態で介挿されて前記第1不織布及び前記第2不織布に固定された前記複合シートを、前記所定方向を搬送方向として搬送する搬送工程と、
前記複合シートにおいて前記CD方向に隣り合う前記弾性部材同士の間の位置に前記厚さ方向に押し込み部材を押し込むことにより、前記複合シートに前記厚さ方向に貫通する前記貫通孔を形成する貫通孔形成工程と、を有し、
前記貫通孔形成工程では、前記第1不織布の両面のうちで前記第2不織布と対向しない非対向面から前記押し込み部材を前記厚さ方向に押し込んだ後に、前記押し込み部材を前記非対向面の方へ引き抜いていき、
前記第1不織布の前記非対向面は、前記第1不織布を生成すべく前記第1不織布の構成繊維を支持部材の支持面に吸引して堆積させた際に、前記支持面に当接した方の面であることを特徴とする吸収性物品に係るシート状部材の製造方法。 - 請求項1に記載の吸収性物品に係るシート状部材の製造方法であって、
前記第2不織布の両面のうちで前記第1不織布と対向しない非対向面は、前記第2不織布を生成すべく前記第2不織布の構成繊維を支持部材の支持面に吸引して堆積させた際に、前記支持面に当接した方の面であることを特徴とする吸収性物品に係るシート状部材の製造方法。 - 請求項1又は2に記載の吸収性物品に係るシート状部材の製造方法であって、
前記複合シートは、前記第1不織布と前記第2不織布とを固定する固定部を有し、
前記貫通孔が前記固定部に重ならないように前記複合シートに前記貫通孔を形成することを特徴とする吸収性物品に係るシート状部材の製造方法。 - 請求項1乃至3の何れかに記載の吸収性物品に係るシート状部材の製造方法であって、
前記複合シートは、前記弾性部材を介さずに前記第1不織布と前記第2不織布とを固定する直接固定部を有し、
前記貫通孔が前記直接固定部に重ならないように前記複合シートに前記貫通孔を形成することを特徴とする吸収性物品に係るシート状部材の製造方法。 - 請求項1乃至4の何れかに記載の吸収性物品に係るシート状部材の製造方法であって、
前記第1不織布の両面のうちで前記支持部材の前記支持面と当接しない方の面を非当接面とした場合に、
前記貫通孔形成工程において前記複合シートに前記貫通孔を形成する貫通孔形成処理位置よりも前記搬送方向の上流側の位置には、従動ローラーが配置されており、
前記従動ローラーは、搬送される前記第1不織布の前記非当接面と接触することにより、前記第1不織布から回転力を得て従動回転することを特徴とする吸収性物品に係るシート状部材の製造方法。 - 請求項5に記載の吸収性物品に係るシート状部材の製造方法であって、
前記従動ローラーは、前記第1不織布が連続する所定方向に移動可能に案内されたダンサーロールであり、
前記ダンサーロールに前記第1不織布が掛け回されることによって前記第1不織布のループが形成されているとともに、前記ダンサーロールには、所定値の荷重が、前記ループが大きくなる方向に付与されていることを特徴とする吸収性物品に係るシート状部材の製造方法。 - 請求項1乃至6の何れかに記載の吸収性物品に係るシート状部材の製造方法であって、
前記非対向面は、前記吸収性物品において肌側面を形成することを特徴とする吸収性物品に係るシート状部材の製造方法。 - 請求項1乃至6の何れかに記載の吸収性物品に係るシート状部材の製造方法であって、
前記非対向面は、前記吸収性物品において非肌側面を形成することを特徴とする吸収性物品に係るシート状部材の製造方法。 - 所定方向に連続する複合シートから複数の貫通孔が形成されたシート状部材を製造する装置であって、
前記所定方向に連続する第1不織布と、前記複合シートの厚さ方向に前記第1不織布に重なって配されつつ前記所定方向に連続する第2不織布との間に、前記所定方向に伸長状態で前記所定方向に沿った複数の弾性部材が、前記所定方向と交差するCD方向に並んだ状態で介挿されて前記第1不織布及び前記第2不織布に固定された前記複合シートを、前記所定方向を搬送方向として搬送する搬送装置と、
前記複合シートにおいて前記CD方向に隣り合う前記弾性部材同士の間の位置に前記厚さ方向に押し込み部材を押し込むことにより、前記複合シートに前記厚さ方向に貫通する前記貫通孔を形成する貫通孔形成装置と、を有し、
前記貫通孔形成装置は、前記第1不織布の両面のうちで前記第2不織布と対向しない非対向面から前記押し込み部材を前記厚さ方向に押し込んだ後に、前記押し込み部材を前記非対向面の方へ引き抜いていき、
前記第1不織布の前記非対向面は、前記第1不織布を生成すべく前記第1不織布の構成繊維を支持部材の支持面に吸引して堆積させた際に、前記支持面に当接した方の面であることを特徴とする吸収性物品に係るシート状部材の製造装置。
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WO2020255523A1 (ja) * | 2019-06-19 | 2020-12-24 | ユニ・チャーム株式会社 | 吸収性物品に係るシート部材の製造方法、吸収性物品に係るシート部材の製造装置、及び吸収性物品 |
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