JP5978284B2 - Manufacturing method and manufacturing apparatus for sheet-like member according to absorbent article - Google Patents

Description

  The present invention relates to a method for manufacturing a sheet-like member and an apparatus for manufacturing absorbent articles such as disposable diapers.

  Conventionally, a sheet-like member is used for manufacturing a disposable diaper known as an absorbent article that absorbs excreted fluid such as urine. And the sheet-like member has the high expansion-contraction area | region and the low expansion-contraction area | region where the elasticity of a predetermined direction is lower than a high expansion / contraction area | region along with the predetermined direction.

FIG. 1 is a schematic view showing an example of a process for generating the sheet-like member 20s ′.
As shown in FIG. 1, first, the composite sheet 20s ′ as the material of the sheet-like member 20s ′ is transported in the transport direction. Here, the composite sheet 20s ′ is a rubber thread as an elastic member continuous in the transport direction between the first continuous sheet 21s ′ continuous in the transport direction and the second continuous sheet 22s ′ continuous in the transport direction. .. Are fixed in the region AH1 ′ corresponding to at least the high expansion / contraction region AH ′.

  When the composite sheet 20s ′ passes the position of the cutter device 30 ′ on the production line, the device 30 ′ is in the region AL1 ′ corresponding to the low expansion / contraction region AL ′ in the composite sheet 20s ′. Are squeezed by a pinching member in the thickness direction to cut the thread rubber continuum 27s ′, 27s ′, and as a result, the sheet 20s ′ has a low stretch region AL ′ and a high stretch region AH ′. They are formed side by side in the transport direction.

Special table 2014-511753

  Here, a pinch mark j 'is formed at a position PC' in which the composite sheet 20s' is pinched by the pinching member. Then, the following two modes are assumed as the pinching mark j '. That is, either a cut mark mode (through hole mode) in which both the first continuous sheet 21s ′ and the second continuous sheet 22s ′ are partially cut at the clamped position PC ′, or the same position An aspect (a non-through-hole-like aspect) of a press-bonded mark formed by press-bonding the first continuous sheet 21s ′ and the second continuous sheet 22s ′ with PC ′ is assumed as the pinch mark j ′.

  In the case of the former cut mark, when a pulling force is applied during use of the diaper, the cut mark is opened, that is, there is a risk of opening the mouth. In addition, even in the latter case of the pressure-bonding mark, the pressure-bonding mark is fragile compared to the surrounding portion, so when the pulling force is applied, the pressure-bonding mark can be cut and opened, that is, In this case, there is a risk of opening the mouth. Such opening of the mouth impairs the appearance of the diaper and is not preferable.

  The present invention has been made in view of the above-described conventional problems, and the object thereof is to open a pinch mark formed on a composite sheet when an elastic member such as a continuous thread rubber is cut. Is to prevent.

The main invention for achieving the above object is:
A method for producing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet that continues in the predetermined direction and the second continuous sheet that continues in the predetermined direction, an elastic member that extends in the predetermined direction and is inserted in the predetermined direction is inserted, at least Conveying the composite sheet fixed in the region corresponding to the high expansion / contraction region with the predetermined direction as the conveyance direction;
Forming the high stretch region and the low stretch region side by side in the transport direction on the composite sheet by sandwiching the composite sheet in a region corresponding to the low stretch region and cutting the elastic member; ,
In the formation, at least one of the narrow indentation is overlapped with at least one of the indentations formed by sandwiching the composite sheet so as to straddle the sandwich indent in the transport direction. And forming two compressed parts on the composite sheet. A method for producing a sheet-like member according to an absorbent article.
Also,
An apparatus for manufacturing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet that continues in the predetermined direction and the second continuous sheet that continues in the predetermined direction, an elastic member that extends in the predetermined direction and is inserted in the predetermined direction is inserted, at least A conveying device that conveys the composite sheet fixed in the region corresponding to the high stretchable region, with the predetermined direction as the conveying direction;
A cutter device that forms the high stretch region and the low stretch region side by side in the transport direction on the composite sheet by sandwiching the composite sheet in a region corresponding to the low stretch region and cutting the elastic member. When,
At least one such that the cutter device overlaps at least one indentation mark formed by pinching the composite sheet, and straddles the indentation mark in the transport direction, and is connected to both sides of the narrow indentation . It is a manufacturing apparatus of the sheet-like member which concerns on the absorbent article characterized by having a pressing part formation apparatus which forms a pressing part in the said composite sheet.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, it is possible to prevent the pinch marks formed on the composite sheet from opening along with the cutting of an elastic member such as a continuous thread rubber.

FIG. 6 is a schematic plan view showing a process of generating a sheet-like member 20s ′ having a high stretch region AH ′ and a low stretch region AL ′. 1 is a schematic perspective view of a three-piece disposable diaper 1 as an example of an absorbent article according to the present embodiment. It is the schematic plan view which looked at the diaper 1 of the unfolding state from the skin side. It is the schematic plan view which looked at the same diaper 1 from the non-skin side. 5A is a cross-sectional view taken along the line AA in FIG. 3, and FIG. 5B is a cross-sectional view taken along the line BB in FIG. It is VI-VI sectional drawing in FIG. 7A and 7B are schematic explanatory diagrams of the forming process of the non-stretchable area AL and the stretchable areas AH and AH. It is a schematic plan view of the intermediate product 20as for explaining the formation process of the embossed part E. 9A is a schematic side view of the apparatus 30 that performs the cutting process of the continuous rubber rubber 27s and the forming process of the embossed portion E, and FIG. 9B is a view taken along the line BB in FIG. 9A. It is explanatory drawing of the arrangement | positioning state of cutter blade C, C ... provided in the cutter block 43 of the cutter roll 41. FIG. It is explanatory drawing of the arrangement | positioning state of protrusion T, T ... of the protrusion group GT provided in the embossing roll 51. FIG. It is a schematic plan view of the intermediate product 20as in which a polymerized embossed part E1 and a non-polymerized embossed part E2 are formed as the embossed part E. It is a schematic plan view of the modification of the formation pattern of pinching marks j, j .... It is explanatory drawing of other embodiment of the apparatus 30 'which performs the cutting process of the continuous body 27s of thread rubber, and the formation process of the embossed part E. FIG. FIG. 15A and FIG. 15B are explanatory diagrams of an example in which each thread rubber continuous body 27s is cut at a plurality of positions PC, PC,... In the conveyance direction in the area AL1 corresponding to the non-stretchable area AL.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
A method for producing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet that continues in the predetermined direction and the second continuous sheet that continues in the predetermined direction, an elastic member that extends in the predetermined direction and is inserted in the predetermined direction is inserted, at least Conveying the composite sheet fixed in the region corresponding to the high expansion / contraction region with the predetermined direction as the conveyance direction;
Forming the high stretch region and the low stretch region side by side in the transport direction on the composite sheet by sandwiching the composite sheet in a region corresponding to the low stretch region and cutting the elastic member; ,
Forming at least one pressing portion on the composite sheet so as to overlap at least one pinching mark formed by clamping the composite sheet in the forming. It is a manufacturing method of the sheet-like member concerning articles.

  According to the manufacturing method of the sheet-like member which concerns on such an absorbent article, a pressing part is formed so that it may overlap with said pinch mark. Therefore, when the pinch indentation is in the form of a cut mark, the parts on both sides of the cut mark can be connected by the pressing part, thereby preventing mouth opening. On the other hand, in the case of the crimping mark mode in which the pinching marks are in an uncut state, the pressing marks can be reinforced by the squeezing part so that the pinching marks are not cut, thereby preventing opening of the mouth. Therefore, in either case, it is possible to prevent the pinch marks from opening.

A method for producing a sheet-like member according to such an absorbent article,
It is desirable that the squeezed portion is formed so as to straddle the pinched indentation in the transport direction.

  According to the manufacturing method of the sheet-like member concerning such an absorbent article, it becomes possible to manufacture an absorbent article that can prevent opening of the mouth. That is, when the absorbent article is used, there is a risk that the tensile force in the transport direction acts on the pinching marks in the low stretch region due to the shrinkage of the high stretch region, and there is a risk of opening the mouth in the transport direction. The squeezing part is formed across the conveyance direction in the pinching mark. Therefore, said connection or reinforcement | strengthening can be reliably performed in a conveyance direction by the same pressing part, As a result, the opening of the conveyance direction of a pinch mark can be prevented effectively.

A method for producing a sheet-like member according to such an absorbent article,
It is desirable that the pressing part formed so as to overlap the pinching mark is formed so as to cover all the parts in the pinching mark.

  According to the manufacturing method of the sheet-like member which concerns on such an absorbent article, said pressing part is formed so that all the parts in the said pinch mark may be covered. Therefore, it is possible to connect or reinforce all the parts involved in the mouth opening in the pinch indentation, and as a result, it is possible to more reliably prevent the pinch indentation from opening.

A method for producing a sheet-like member according to such an absorbent article,
In forming the squeezed part, the squeezed part is also formed at a position that does not overlap the pinched indentation,
It is desirable that at least one of the pressing parts at a position not overlapping the pinching mark is formed at a position not overlapping the elastic member cut in the forming.

  According to the manufacturing method of the sheet-like member which concerns on such an absorbent article, the pressing part of the position which does not overlap with said pinching indentation is formed in the position which does not overlap with the cut | disconnected elastic member. Therefore, the said pressing part can join a 1st continuous sheet and a 2nd continuous sheet firmly, without being disturbed by an elastic member. As a result, these two continuous sheets can integrally receive the tensile force firmly, and as a result, the tensile force can be reduced due to the fact that only one of the continuous sheets receives the tensile force. It is possible to avoid being difficult to receive, and thereby it is possible to prevent the pinch marks from opening more reliably.

A method for producing a sheet-like member according to such an absorbent article,
In the forming, the elastic member is cut at one place in the transport direction for each region corresponding to the low expansion / contraction region and for each elastic member, and the elastic member is a region corresponding to the high expansion / contraction region. By shrinking toward the direction, the composite sheet is formed by arranging the high stretch region and the low stretch region in the transport direction,
At least one of the squeezing parts in a position that does not overlap the elastic member is an elastic member that is cut and contracted, and the elastic members in the direction perpendicular to the transport direction are the same as each other. It is desirable that it be formed on an imaginary straight line.

  According to the method for manufacturing a sheet-like member according to such an absorbent article, the virtual line is a so-called line of action of the tensile force of the elastic member that has been cut and contracted. The above-described pulling force can be easily transmitted. Therefore, the pulling force can promote the opening of the pinch mark. However, if the pressing part is formed on the virtual straight line as described above, the pulling force can be quickly received by the pressing part. As a result, transmission of the pulling force to the pinching marks can be suppressed, and as a result, opening of the pinching marks can be effectively prevented.

A method for producing a sheet-like member according to such an absorbent article,
In the forming, the elastic member is cut at one place in the transport direction for each region corresponding to the low expansion / contraction region and for each elastic member, and the elastic member is a region corresponding to the high expansion / contraction region. By shrinking toward the direction, the composite sheet is formed by arranging the high stretch region and the low stretch region in the transport direction,
In forming the squeezed part, the squeezed part at a position overlapping the squeezing impression and the squeezing part at a position not overlapping the squeezing impression are formed in a predetermined range,
It is desirable that the cut end portions of the elastic member cut and contracted are located on both sides of the predetermined range in the transport direction.

  According to the method for manufacturing a sheet-like member according to such an absorbent article, the cut end portions of the elastic member that has been cut and contracted are positioned on both sides of the conveyance direction in the predetermined range in which the compressed portion is formed. ing. Therefore, the said cutting | disconnection edge part can be made not conspicuous by the pressing part located in the vicinity, As a result, the appearance of an absorbent article can be made favorable.

A method for producing a sheet-like member according to such an absorbent article,
The elastic member is a continuous thread rubber;
It is desirable that the size in the transport direction and the size in the direction orthogonal to the transport direction of the pressing portion at a position not overlapping the pinching mark are larger than the thickness of the rubber thread when not stretched.

  According to the method for manufacturing a sheet-like member according to such an absorbent article, the dimensions of the squeezing part in the conveyance direction and the direction perpendicular to the conveyance direction are respectively the thickness of the continuous thread rubber when not stretched. It is set larger than this. Therefore, the cut end portion of the rubber thread can be made less noticeable based on the compressed portion.

A method for producing a sheet-like member according to such an absorbent article,
An adhesive for fixing the elastic member to at least one of the first continuous sheet and the second continuous sheet is not applied to the position of the pressing portion formed so as to overlap the pinch mark. desirable.

  According to the manufacturing method of the sheet-like member which concerns on such an absorbent article, the adhesive agent is not apply | coated to the position of said pressing part. Therefore, when forming the said pressing part, it can prevent that an adhesive oozes out and a pressing part and its vicinity part become sticky, and the adhesive adheres to the apparatus which forms said pressing part. This can be prevented from being soiled. Furthermore, since the pressing part is formed so as to overlap with the pinching mark, there is a risk of promoting bleeding of the adhesive when the pinning mark is broken. Since the adhesive is not applied to the position, this can also be prevented.

A method for producing a sheet-like member according to such an absorbent article,
In the forming, the pinching indentation is formed in a central portion in the transport direction in a region corresponding to the low expansion / contraction region,
It is desirable that an absorbent core formed by molding liquid absorbent fibers into a predetermined shape is superimposed on the central portion.

  According to the method for manufacturing a sheet-like member according to such an absorbent article, a tensile force that can act on the central portion due to the shrinkage of the high stretchable region can be received even by the highly rigid absorbent core. Therefore, it is possible to reduce the pulling force that can act on the pinching marks in the center, and as a result, it is possible to more effectively prevent the pinching marks from opening.

Also,
An apparatus for manufacturing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet that continues in the predetermined direction and the second continuous sheet that continues in the predetermined direction, an elastic member that extends in the predetermined direction and is inserted in the predetermined direction is inserted, at least A conveying device that conveys the composite sheet fixed in the region corresponding to the high stretchable region, with the predetermined direction as the conveying direction;
A cutter device that forms the high stretch region and the low stretch region side by side in the transport direction on the composite sheet by sandwiching the composite sheet in a region corresponding to the low stretch region and cutting the elastic member. When,
A pressing part forming device that forms at least one pressing part on the composite sheet so that the cutter device overlaps at least one pressing mark formed by pressing the composite sheet. It is a manufacturing apparatus of the sheet-like member which concerns on an absorbent article.

  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.

=== This Embodiment ===
The manufacturing method and the manufacturing apparatus 30 of the sheet-like member 20as which concern on the absorbent article of this embodiment are used in the manufacturing line of the disposable diaper 1 as an example of an absorbent article, for example. FIG. 2 is a schematic perspective view of a three-piece type disposable diaper 1 as an example of the disposable diaper 1. FIG. 3 is a schematic plan view of the unfolded diaper 1 as seen from the skin side, and FIG. 4 is a schematic plan view of the diaper 1 as seen from the non-skin side. 5A is a sectional view taken along line AA in FIG. 3, FIG. 5B is a sectional view taken along line BB in FIG. 3, and FIG. 6 is a sectional view taken along line VI-VI in FIG.

As shown in FIG. 3, FIG. 5A, and FIG. 6, this diaper 1 has a vertical direction, a horizontal direction, and a thickness direction as three directions orthogonal to each other. Moreover, since the diaper 1 is what is called a three-piece type, it has the absorptive main body 10 which is applied to a wearer's crotch part and absorbs excrement, such as urine, as a 1st component, And it has the ventral side belt member 20a which covers the wearer's torso from the abdomen side, and has the back side band member 20b which covers the wearer's torso from the back side as the third part.
In the deployed state of FIG. 3, the abdominal band member 20a and the dorsal band member 20b are arranged in parallel with a space between each other, while the absorbent main body 10 is stretched between them. End portions 10ea and 10eb in the longitudinal direction of the absorbent main body 10 are bonded and fixed to the nearest belt members 20a and 20b, respectively, and the external shape is substantially H-shaped in plan view. Also, from this state, the diaper 1 is folded in two with the substantially central portion CL10 in the longitudinal direction of the absorbent main body 10 as the folding position, and the belt members 20a, 20b facing each other in the folded state are worn by the wearer. When the portions 20ae and 20be to be brought into contact with the flank are welded and connected at the end portions 20ae and 20be in the lateral direction, the band members 20a and 20b are connected in an annular shape, thereby 2 is a pants-type diaper 1 in which a waist opening 1HB and a pair of leg openings 1HL, 1HL are formed as shown in FIG.

  The absorbent main body 10 absorbs the absorbent core 11, the liquid-permeable surface sheet 13 that covers the core 11 from the skin side and forms the skin side surface of the absorbent main body 10, and the core 11 from the non-skin side. A liquid-impermeable back sheet 15 that forms the non-skin side surface of the adhesive main body 10. The absorbent core 11 is formed by molding a liquid absorbent material such as pulp fiber as an example of a liquid absorbent fiber or a superabsorbent polymer into a predetermined shape such as a substantially hourglass shape in plan view. In this example, the core 11 is covered with a liquid-permeable covering sheet 12, and the back sheet 15 has a two-layer structure having a nonwoven fabric 15nw and a resin film 15f. Not limited to this.

  Moreover, as shown in FIG.3 and FIG.5B, the absorptive main body 10 may have the solid gathers LSG and LSG as a leak-proof wall part in each edge part of a horizontal direction in order to prevent a side leak. Furthermore, elastic members 17r such as rubber thread are arranged on both sides of the absorbent main body 10 in the lateral direction, so that it corresponds to the leg openings 1HL and 1HL of the diaper 1 as shown in FIG. Stretchable leg gathers LG, LG may be formed on the portion to be stretched.

  On the other hand, as shown in FIGS. 3 and 4, the abdominal band member 20a and the dorsal band member 20b are respectively sheet-like members having a substantially rectangular shape in plan view that are long in the lateral direction, and as shown in FIGS. It has an outer layer sheet 21 and an inner layer sheet 22 laminated in the thickness direction. The inner layer sheet 22 is located on the skin side in the thickness direction with respect to the outer layer sheet 21. Moreover, both the sheets 21 and 22 are formed with flexible sheets, such as a nonwoven fabric, and the spun bond nonwoven fabric is used in this example. However, the present invention is not limited to this, and another type of non-woven fabric may be used, or a resin film or woven fabric may be used. In this example, a single fiber of polypropylene (PP) is used as a constituent fiber of the nonwoven fabric. However, the present invention is not limited to this, and a single fiber of other thermoplastic resin such as polyethylene (PE) may be used. Furthermore, a composite fiber such as a sheath core structure of PE and PP may be used.

  And the center area | region 20ac and 20bc of the horizontal direction in each strip | belt member 20a and 20b is piled up and joined to the non-skin side surface of each edge part 10ea and 10eb of the vertical direction of the absorptive main body 10. FIG.

  Incidentally, in this example, as shown in FIG. 3 and FIG. 6, the planar size of the outer layer sheet 21 is a size that protrudes outward in the vertical direction from the inner layer sheet 22, and the protruding portion of the outer layer sheet 21. 21p is folded inward in the longitudinal direction to cover the longitudinal end portion 22e of the inner layer sheet 22, but is not limited thereto.

  Further, the belt members 20a and 20b are provided with lateral stretchability so that the belt members 20a and 20b can firmly hold the wearer's torso when the diaper 1 is worn. However, from the viewpoint of suppressing the generation of wrinkles at the position of the absorbent core 11 of the absorbent main body 10 and preventing the deterioration of its liquid absorbency and leakproof properties, as shown in FIG. 4, the band members 20a and 20b In particular, in the regions 20ac and 20bc overlapping the absorbent core 11 of the absorbent main body 10, a non-stretchable region AL having almost no stretchability is formed.

  Hereinafter, this will be described. Here, the basic configuration of the abdominal band member 20a and the back band member 20b is the same. Therefore, in the following description, only the ventral band member 20a will be described, and the description of the dorsal band member 20b will be omitted. For convenience of explanation, as shown in FIG. 4, the ventral belt member 20a will be described below by dividing it into two regions AU and AD in the vertical direction. That is, the area AU located on the waistline opening 1HB side in the vertical direction is referred to as “upper area AU”, and the area AD located on the leg circumference opening 1HB side is referred to as “lower area AD”.

  As shown in FIG. 4, the absorbent core 11 of the absorbent main body 10 does not substantially overlap the upper region AU. Therefore, the region AU is given stretchability over the entire length in the lateral direction. In addition, the provision of stretchability is realized by a plurality of thread rubbers 25, 25... Arranged in the horizontal direction in a laterally stretched state and fixed in the same region AU in the vertical direction. The thread rubber 25 is fixed to the area AU by, for example, the thread rubber 25 or a hot melt adhesive applied to the area AU. Incidentally, examples of the fineness of the thread rubber 25 include 400 dtex to 1000 dtex, and specific examples of the thread rubber 25 include LYCRA (trademark). This also applies to the rubber thread 27 provided in the lower region AD described later.

  On the other hand, the absorptive core 11 of the absorptive main body 10 overlaps the central area ADc in the lateral direction of the lower area AD over most of the area. For this reason, a non-stretchable region AL (corresponding to a low stretchable region) having substantially no lateral stretchability is formed in the central region ADc, and each end region ADe located on both sides of the central region ADc. , ADe, since the absorbent core 11 does not generally overlap, the same-end regions ADe, ADe have stretch regions AH, AH (corresponding to high stretch regions) having higher stretchability than the non-stretch region AL. Is formed.

  Here, the non-stretchable region AL of the central region ADc and the stretchable regions AH, AH of the end regions ADe, ADe are formed as follows. 7A and 7B are schematic explanatory views of the forming process. As shown in FIG. 7A, this forming process is performed on the intermediate product 20as of the ventral belt member 20a conveyed in a so-called “lateral flow configuration”. That is, the intermediate product 20as at this time is in a state of a continuous body 20as in which a plurality of ventral side belt members 20a, 20a. More specifically, the intermediate product 20as includes a continuous sheet 21s (corresponding to a first continuous sheet) of the outer layer sheet 21 that is continuous in the horizontal direction and a continuous sheet 22s (second continuous sheet) of the inner layer sheet 22 that is also continuous in the horizontal direction. Between the continuous sheets 21s and 22s, while a plurality of continuous thread rubber continuous bodies 27s, 27s... Are inserted between the continuous sheets 21s and 22s. 22s is in the state of the composite sheet 20as joined together. Further, the thread rubber continuums 27s, 27s,... Are stretched in the lateral direction and arranged in the vertical direction, and the thread rubber continuums 27s are arranged in the stretchable area AH of the end side area ADe. In the corresponding region AH1, it is generally fixed with a hot melt adhesive, but in the region AL1 corresponding to the non-stretchable region AL of the central region ADc, it is not generally fixed. An area AL1 corresponding to the non-stretchable area AL exists at the product pitch P1 of the diaper 1 in the lateral direction.

  Therefore, the intermediate product 20as is sandwiched in the thickness direction for each region AL1 corresponding to the non-stretchable region AL appearing at the product pitch P1 in the transport direction while transporting the intermediate product 20as with the lateral direction as the transport direction. The continuous bodies 27s, 27s... Of each rubber thread are cut in the same area AL1. Then, in the same area AL1, since the hot melt adhesive for fixing the thread rubber continuous bodies 27s, 27s... Is not applied, the thread rubbers 27, 27... Cut as shown in FIG. Without being able to stay in the same area AL1, it shrinks in the lateral direction toward the area AH1 corresponding to the stretchable area AH. And this shrinkage | contraction stops in the same area | region AH1 to which the same adhesive agent was apply | coated, Thereby, the non-expanding-contraction area | region AL of center area | region ADc and the expansion / contraction area | region AH of the end side area | region ADe are formed.

  By the way, as shown in FIG. 7B, the intermediate product 20as after the cutting process has a pinch mark j remaining due to the pinching pressure. Vulnerable compared. For example, in this example, the pinching mark j is a so-called press-bonding mark j in which the continuous sheet 21s of the outer layer sheet 21 and the continuous sheet 22s of the inner layer sheet 22 are bonded by pressure bonding, but the mark j is high. Since it is squeezed at a compression ratio and is generally made into a film, it is thinner than the surrounding part and is therefore fragile. Therefore, when the diaper 1 is used, if a tensile force acts on the ventral belt member 20a and stress is concentrated on the same mark j, the same mark j may be cut and opened. That is, there is a risk of opening the mouth. Such opening of the mouth impairs the appearance of the diaper 1.

Therefore, in this embodiment, as shown in FIG. 8, after this cutting process, an embossed portion E (corresponding to the compressed portion) is formed so as to overlap the pinched mark j, and thus the mark j is not cut. Thus, the same mark j is reinforced by the embossed portion E. For example, by forming the embossed portion E in the same mark j, the stress concentration of the tensile force on the same mark j can be relieved, thereby substantially reinforcing the same mark j. As a result, it is possible to prevent the same mark j from being cut and prevent the same mark j from opening, so that the appearance of the diaper 1 can be improved.
In this example, as shown in FIG. 8, the embossed portions E, E... Are formed for all the pinching marks j, j. For example, if a plurality of embossed portions E, E... Are formed so as to overlap more than half of the pinching marks j, each of the pinching marks j, j. As a result, the appearance of the diaper 1 can be greatly improved.
Furthermore, the embossed portion E may be formed with respect to at least one pinch mark j. That is, if the embossed portion E is formed so as to overlap with at least one pinching indentation j, it is possible to prevent the mouth opening from occurring at least with respect to the pinching indentation j. It can contribute to the improvement of the appearance of the diaper 1. Therefore, the embossed part E should just be formed with respect to the at least 1 pinching impression j.

  FIG. 9A and FIG. 9B are explanatory views of the device 30 that performs the above-described thread rubber continuous body 27s cutting process and embossed part E forming process on the intermediate product 20as of the ventral belt member 20a. 9A is a schematic side view of the device 30, and FIG. 9B is a BB arrow view in FIG. 9A. In the following description, as shown in FIG. 9A and FIG. 9B, the direction corresponding to the width direction of the intermediate product 20as in the apparatus 30 is referred to as “CD direction”. The three sides with the thickness direction of 20as are orthogonal to each other.

As shown in FIG. 9A, the apparatus 30 includes a rotating drum 31 that rotates around a rotation axis along the CD direction, a cutter roll 41 that rotates at a predetermined position in the rotation direction Dc31 of the rotating drum 31, The embossing roll 51 is disposed at a position downstream of the cutter roll 41 in the rotational direction Dc31 and rotates, and the rotating drum 31, the cutter roll 41, and the housing 35 that supports the embossing roll 51.
As shown in FIG. 9A, in the apparatus 30, the intermediate product 20as is wound around the outer peripheral surface 31a of the rotary drum 31 and held in a state where there is substantially no relative slip, and the intermediate product is driven by the driving rotation of the rotary drum 31. 20 as is conveyed in the rotation direction Dc31. Then, the area AL1 corresponding to the non-stretchable area AL of the intermediate product 20as first passes the position P41 of the cutter roll 41. At that time, the intermediate product 20as is sandwiched between the cutter roll 41 and the rotary drum 31. Is done. As a result, a pinch mark j is formed in the intermediate product 20as and the continuous body 27s of each rubber thread is cut. As a result, a non-stretchable region AL and a stretchable region AH are formed in the intermediate product 20as. The Next, when the above-mentioned pinching mark j passes the position P51 of the embossing roll 51, the intermediate product 20as is squeezed by the embossing roll 51 and the rotary drum 31. And thereby, the embossed part E is squeezed and formed on the intermediate product 20as so as to overlap the pinching mark j.
Hereinafter, the rotating drum 31, the cutter roll 41, and the embossing roll 51 will be described in detail. Incidentally, as is clear from the above, the rotary drum 31 corresponds to a “conveying device”, and the configuration having the cutter roll 41 and the rotary drum 31 corresponds to a “cutter device”. The configuration having the rotating drum 31 corresponds to a “squeezing part forming device”.

<<< Rotating drum 31 >>>
As shown in FIGS. 9A and 9B, the rotary drum 31 is supported by a bearing member 31B fixed to the housing 35 so as to be substantially immovable so as to be rotatable about a rotation axis at a fixed position along the CD direction. Further, the rotating drum 31 has a perfect circular outer peripheral surface 31a, and is connected to a servo motor (not shown) via a suitable power transmission mechanism (not shown) such as a pulley and a timing belt. It is connected. As a result, the rotating drum 31 is driven and rotated around the rotation axis, and this driving and rotating operation is performed on the basis of a synchronization signal or the like for conveying the intermediate product 20as conveyed from the upstream in the conveying direction to the rotating drum 31. Control is performed in conjunction with the speed (m / min). Therefore, the rotating drum 31 can hold the intermediate product 20as on the outer peripheral surface 31a while preventing the intermediate product 20as from being excessively pulled or loosened in the transport direction.

<<< cutter roll 41 >>>>
The cutter roll 41 is supported by a bearing member 41B provided in the housing 35 so as to be rotatable around a rotation axis along the CD direction. Further, at least one cutter block 43 is provided on the outer peripheral surface 41 a of the cutter roll 41. The cutter block 43 is provided at every angle corresponding to the product pitch P <b> 1 of the diaper 1 in the circumferential direction of the roll 41. Specifically, in this example, two cutter blocks 43 and 43 are provided at an angle of 180 ° in the circumferential direction. Each cutter block 43 is formed with a plurality of cutter blades C, C. Further, the cutter roll 41 is connected to a servo motor as a drive source (not shown) via an appropriate power transmission mechanism (not shown) such as a pulley or a timing belt, and thus the cutter roll 41 is Drives and rotates around the rotation axis. And this drive rotation operation is position-controlled or speed-controlled so as to be linked with the conveying operation of the intermediate product 20as by the rotary drum 31, so that whenever the area AL1 corresponding to the non-expandable area AL passes, The cutter roll 41 rotates so that the cutter block 43 faces the area AL1.

  Therefore, each time the area AL1 corresponding to the non-expandable area AL of the intermediate product 20as passes through the arrangement position P41 of the cutter roll 41 in the rotation direction Dc31 of the rotary drum 31, the area AL1 becomes the cutter block 43 of the cutter roll 41. The cutter blades C, C. Then, the thread rubber continuums 27s, 27s,... Are cut at the clamped positions PC, PC,..., Thereby forming a non-stretchable region AL and a stretchable region AH in the intermediate product 20as. .

  Incidentally, according to the above position control, the conveyance operation of the rotary drum 31 and the clamping operation of the cutter roll 41 are synchronized as follows, for example. First, the synchronization signal is a signal obtained by repeatedly outputting a unit signal in correspondence with the product pitch P1 of the intermediate product 20as. That is, each time a unit signal is output, the intermediate product 20as is supplied to the product pitch by the rotary drum 31. Only P1 is conveyed. As a result, the area AL1 corresponding to the non-stretchable area AL also passes the position P41 of the cutter roll 41 each time a unit signal is output. On the other hand, the cutter roll 41 also has the above-described pinching operation as a patterned unit processing operation to be repeated for each product pitch P1 with respect to the intermediate product 20as. Are controlled in a one-to-one correspondence with each other. For example, in this example, since two cutter blocks 43 and 43 that perform the clamping operation are provided on the outer peripheral surface 41a of the cutter roll 41, the cutter roll 41 performs unit processing operation for each unit signal based on position control. Half-rotation as a squeezing operation. Thus, each time the area AL1 corresponding to the non-stretchable area AL passes, the area AL1 can be clamped by the cutter blade C of the cutter block 43.

  In this example, the bearing member 41 </ b> B related to the cutter roll 41 is moved in the rotational radius direction of the rotating drum 31 (direction of contacting / separating with the rotating drum 31) via an actuator 41 </ b> A such as a hydraulic cylinder fixed to the housing 35. It is supported so that it can reciprocate. And if it is made like this, the magnitude | size of the space | interval between the cutter roll 41 and the rotating drum 31 or the magnitude | size of the pinching pressure (N) of a rotation radius direction can be adjusted by controlling the actuator 41A. It is. And the magnitude | size of the said space | interval or the magnitude | size of pinching pressure (N) is set to the value which can cut | disconnect the thread rubber | gum continuous body 27s through actual machine experiment etc. FIG. However, it is not limited to this. That is, the bearing member 41B may be directly fixed to the housing 35 and supported.

  FIG. 10 is an explanatory diagram of the arrangement state of the cutter blades C, C... Provided in the cutter block 43, and is a diagram showing the outer peripheral surface 41a of the cutter roll 41 developed on a plane. In FIG. 10, the thread rubber continuum 27s is also virtually indicated by a two-dot chain line.

  As shown in FIG. 10, in this example, as a plurality of cutter blades C, C..., Cutter blades C, C... Having a straight edge shape in plan view are arranged side by side on a straight line along the CD direction. Has been. The length LC in the extending direction of the blade edge is selected from a range of 1 mm to 15 mm, for example, and the dimension WC in the blade width direction orthogonal to the extending direction is selected from a range of 0.01 mm to 0.5 mm, for example. Has been. However, the shape of the cutting edge is not limited to the linear shape as described above, and may be a zigzag broken line shape or a curved shape such as an arc line shape.

  In the example of FIG. 10, one cutter blade C is provided for each of the thread rubber continuums 27s, 27s. For example, as described above, since seven continuous thread rubbers 27s, 27s,... Are arranged in the lower region AD, seven cutter blades C, C,. Thus, each cutter blade C cuts one corresponding thread rubber continuous body 27s at one place PC in the transport direction. However, the arrangement pattern of the cutter blades C is not limited to this, and other arrangement patterns may be used. For example, a plurality of cutter blade rows GC made up of a plurality of cutter blades C, C... Arranged in a straight line along the CD direction may be provided side by side in the transport direction. Can be effectively prevented.

  Furthermore, in this example, the direction of each cutter blade C, C is inclined at an inclination angle α of 30 ° as an example of an appropriate size other than 90 ° from the CD direction, and only the magnitude of the inclination angle α is used. As for the direction of the inclination, all the cutter blades C, C... Are arranged, but the present invention is not limited to this. That is, the magnitude of the inclination angle α is not limited to the above 30 °, and the magnitude of the inclination angle α may not be uniform over all the cutter blades C, C. It is not necessary to align the inclination direction over all the cutter blades C, C.

<<< embossing roll 51 >>>
As shown in FIG. 9A, the embossing roll 51 is supported by a bearing member 51B provided in the housing 35 so as to be rotatable about a rotation axis along the CD direction. Further, at least one group of protrusion groups GT including a plurality of protrusions T, T... Is provided on the outer peripheral surface 51 a of the embossing roll 51. And the said protrusion group GT is provided at every angle corresponding to the product pitch P1 of the diaper 1 in the circumferential direction of the roll 51. Specifically, in this example, two protrusion groups GT and GT are provided at an angle of 180 ° in the circumferential direction. Further, some of the plurality of protrusions T, T... Constituting each protrusion group GT are arranged in the same arrangement pattern as the above-described cutter blades C, C... (See FIG. 11 described later). . Further, the embossing roll 51 is connected to a servo motor as a driving source (not shown) via an appropriate power transmission mechanism (not shown) such as a pulley and a timing belt. Drives and rotates around the rotation axis. And this drive rotation operation is position-controlled or speed-controlled so as to interlock with the conveying operation of the intermediate product 20as or the clamping operation of the cutter roll 41, whereby the clamping impression j of the non-stretchable region AL passes. Each time, the embossing roll 51 rotates so that the protrusions T, T...

  Therefore, every time the pinch mark j of the non-stretchable region AL of the intermediate product 20as passes through the arrangement position P51 of the embossing roll 51 in the rotation direction Dc31 of the rotary drum 31, the pinch mark j is a protrusion group of the embossing roll 51. It is squeezed by the protrusion T of GT. And the embossed part E is squeezed and formed so that it may overlap with the pinch mark j by this.

  Incidentally, according to said position control, synchronization with the pinching operation | movement of the cutter roll 41 and the pressing operation of the embossing roll 51 is made as follows, for example. First, as described above, the position of the cutter roll 41 is controlled so as to perform a clamping operation on the intermediate product 20as each time a unit signal of the synchronization signal is output. This also has a squeezing operation as a patterned unit processing operation to be repeated for each product pitch P1 with respect to the intermediate product 20as. And this pressing operation is also associated with the unit signal in a one-to-one correspondence and position controlled. For example, in this example, two protrusion groups GT and GT that perform such pressing operation are provided on the outer peripheral surface 51a of the embossing roll 51, so that the embossing roll 51 performs unit processing operation for each unit signal based on position control. Half rotation as a squeezing operation. Thus, each time the pinching mark j of the non-stretchable region AL passes, the mark j can be squeezed by the protrusion T of the protrusion group GT.

  In this example, the bearing member 51B related to the embossing roll 51 is also in the rotational radius direction of the rotating drum 31 (the direction of contact with and away from the rotating drum 31) via an actuator 51A such as a hydraulic cylinder fixed to the housing 35. It is supported so that it can reciprocate. And if it is made like this, the magnitude | size of the space | interval between the embossing roll 51 and the rotating drum 31 or the magnitude | size of the pressing force (N) of a rotation radius can be adjusted by controlling the actuator 51A. It is. And the magnitude | size of the said space | interval or the magnitude | size of pressing force (N) is set to the value suitable for formation of the embossed part E through an actual machine experiment. That is, it sets to the value which can squeeze the pinch mark j and its peripheral part, without penetrating the intermediate product 20as in the thickness direction. However, it is not limited to this. That is, the bearing member 51B may also be fixed and supported directly on the housing 35.

  FIG. 11 is an explanatory view of the arrangement state of the protrusions T, T... Of the protrusion group GT provided on the embossing roll 51, and is a view showing the outer peripheral surface 51a of the roll 51 expanded on a plane. . In FIG. 11, the cutter blades C, C... Of the cutter roll 41 are also virtually illustrated with solid lines.

  In this example, for the purpose of forming the embossed portions E, E,... On all the clamping marks j, j,..., The cutter blades C, C, basically correspond to all the cutter blades C, C,. Are provided on the outer peripheral surface 51a of the embossing roll 51 with the same arrangement pattern. However, as can be seen with reference to FIG. 12, in addition to these, protrusions T, T... That is, protrusions T, T... Are also provided at positions that do not correspond to the cutter blades C, C. As a result, as shown in FIG. 12, a plurality of embossed portions E are formed in the non-stretchable region AL of the intermediate product 20as at positions that do not overlap with the pinching marks j. In the following, the embossed portion E formed so as to overlap the pinching mark j is referred to as “polymerized embossed portion E1”, and the embossed portion E formed so as not to overlap the pinch mark j is referred to as “non-polymerized”. It says "embossed part E2."

  As shown in FIG. 12, in this example, since a plurality of pinching marks j, j... Are formed in the central portion in the transport direction in the non-stretchable region AL, the plurality of superposed embossed portions E1, E1. In the non-stretchable area AL, it is formed at the center in the transport direction. In addition, since the pinching indentation j is formed in a straight line in the CD direction, the polymerization embossed portions E1, E1,... Are also formed in a straight line in the CD direction. The embossed portions E1, E1,... Form a superposed embossed portion row GE1.

  Moreover, each superposition | polymerization embossing part E1 is each formed so that the corresponding pinch mark j may be straddle | crossed in a conveyance direction. And thereby, the diaper 1 which can prevent a mouth opening effectively can be manufactured. That is, when the diaper 1 is used, a tensile force in the transport direction can act on the pinching impression j in the non-stretching area AL based on the contraction of the expansion / contraction area AH. E1 is formed across the transport direction. Therefore, in the same polymerization embossed portion E1, the stress concentration of the tensile force can be dispersed over a wide range (for example, the region of the embossed portion E1 indicated by a circle in FIG. 12). Can be effectively prevented.

  Further, as described above, each superposed embossed portion E1 is formed at the central portion in the transport direction in the non-stretchable region AL. In such a central portion, it acts on the ventral belt member 20a when the diaper 1 is used. The tensile force can be received even by the highly rigid absorbent core 11. Therefore, it is possible to reduce the pulling force that can act on the pinch mark j in the center, and as a result, it is possible to more effectively prevent the pinch mark j from opening.

  On the other hand, as shown in FIG. 12, the non-polymerized embossed portions E2, E2,... Are also formed in a straight line in the CD direction with the same alignment pattern as the above-described polymerized embossed portion row GE1. The embossed portion row GE2 is formed. A plurality of such non-polymerized embossed part rows GE2 are arranged on both sides in the transport direction of the polymerized embossed part rows GE1. Then, according to such an arrangement, the non-polymerized embossed portions E2, E2... Imaginarily connect the thread rubbers 27, 27 having the same position in the CD direction among the thread rubbers 27, 27. Although it will be formed on the straight line L27, if it does in this way, the opening of the pinch mark j can be prevented more effectively. That is, since the virtual straight line L27 is a so-called line of action of the tensile force of the thread rubber 27 that has been cut and contracted, the tensile force is easily transmitted on the virtual straight line L27, and thus The force promotes opening of the pinch mark j. However, with respect to this point, as shown in FIG. 12, if the non-polymerized embossed portions E2, E2,... Are formed on the virtual straight line L27, the non-polymerized embossed portion E2 promptly applies the above pulling force. Can receive. As a result, the transmission of the tensile force to the pinching impression j can be suppressed, and as a result, the opening of the pinching impression j can be effectively prevented.

  Further, in this example, as shown in FIG. 12, all the non-polymerized embossed portions E2, E2,... Are formed at positions that do not overlap the cut and contracted thread rubber 27. Therefore, the embossed portion E2 can firmly join the continuous sheet 21s of the outer layer sheet 21 and the continuous sheet 22s of the inner layer sheet 22 without being obstructed by the same thread rubber 27. As a result, the two continuous sheets 21s and 22s can be integrated to receive the above-described pulling force firmly, and as a result, only one of the continuous sheets 21s and 22s receives the pulling force. Therefore, it is possible to avoid the difficulty of receiving the pulling force, and as a result, it is possible to more reliably prevent the pinch mark j from opening. However, it is not limited to this. That is, if at least one non-polymerized embossed portion E2 is formed at a position that does not overlap the above-described thread rubber 27, it is possible to enjoy a corresponding opening prevention effect. It is only necessary that E2 is so.

In addition, in the example of FIG. 12, the superposed embossed portion E1 is formed not only to straddle the pinching mark j in the transport direction but also to cover all the parts in the mark j. Specifically, the polymerization embossed portion E1 is formed in a perfect circular shape having a diameter equal to or larger than the full length dimension of the linearly formed pinching indentation j, whereby the pinching indentation j is formed from the polymerization embossing portion E1. Some do not protrude outside. Therefore, it is possible to reinforce all portions that can be the starting point of the mouth opening in the pinching mark j.
For example, the stress concentration of the tensile force that causes the mouth opening can be dispersed over a wide range for all the portions in the pinching mark j, and as a result, the opening of the pinching mark j can be more reliably prevented.

  However, it is not limited to this. That is, the polymerization embossed portion E1 does not necessarily have to be formed so as to cover all the portions of the pinching impression j, and in other words, even if a part of the pinching impression j protrudes from the polymerization embossed portion E1. good. However, in that case, the effect of preventing the above-mentioned mouth opening is slightly lowered.

  Further, the shape of the polymerization embossed portion E1 is not limited to the above-mentioned regular circle. For example, another circular shape such as an ellipse, a polygonal shape such as a triangle or a quadrangle, or other shapes may be used.

  Further, the optimum dimension of the superposed embossed portion E1 can be changed according to the size of the pinching mark j, and an example thereof is as follows. That is, the embossed portion E1 is formed so that the dimension in the arbitrary direction of the bottom surface is within a range of, for example, 1 mm to 10 mm, and preferably within a range of 1.5 mm to 5 mm. Incidentally, the example of the shape and the numerical value of the dimensions are the same for the non-polymerized embossed portion E2.

  By the way, in the example of FIG. 12, the non-polymerized embossed portion E2 is formed in the predetermined range RE in the non-stretchable region AL, and the stretchable region AH is located on both sides of the predetermined range RE in the transport direction. Yes. For this reason, the cut end portions 27e of the thread rubber 27 that has been cut and contracted are located on both sides in the transport direction of the predetermined range RE. If this is the case, the cut end portions 27e are attached to the cut end portions 27e. , And can be made inconspicuous by the non-polymerized embossed portion E2 located around the periphery. As a result, the appearance of the diaper 1 can be improved. Incidentally, from the viewpoint of making the cut end portion 27e inconspicuous, it is preferable to make the size in the transport direction and the size in the CD direction of the non-polymerized embossed portion E2 larger than the thickness of the thread rubber 27 when not stretched.

  FIG. 13 is a schematic plan view of a modification of the formation pattern of the pinching marks j, j. In this modified example, the plurality of pressing impressions j, j... Are not formed side by side on a straight line along the CD direction, that is, the plurality of pressing impressions j, j. Has been. Accordingly, the arrangement pattern of the superposed embossed portions E1, E1,... Is not an aligned pattern aligned on a straight line along the CD direction. Further, along with this, the non-polymerized embossed portions E2, E2,... Do not form the linear non-polymerized embossed portion row GE2 along the CD direction. However, such a formation pattern is also included in the scope of the present invention. Incidentally, in this example, one of the 11 pinching dents j, j... Is not formed with the overlapping embossed portion E1, and the pinching dent j may be open. However, because there are very few, it does not stand out greatly.

FIG. 14 is an explanatory diagram of another embodiment of an apparatus 30 ′ that performs the cutting process of the thread rubber continuous body 27s and the forming process of the embossed portion E.
In the above-described embodiment, as shown in FIG. 9A, one rotating drum 31 is used in both the cutting process of the thread rubber continuous body 27 s performed by the cutter roll 41 and the forming process of the embossed portion E performed by the embossing roll 51. However, the example shown in FIG. 14 is mainly different in that the cutter roll 41 and the embossing roll 51 have dedicated anvil rolls 42 and 52, respectively. In this respect, the embodiment is mainly different from the above-described embodiment, and is otherwise substantially the same as the above-described embodiment. Therefore, in the following, this difference will be mainly described, and the same components as those of the above-described embodiment are denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 14, in the apparatus 30 ′ of the other embodiment, a pair of upper and lower parts that can rotate around the rotation axis along the CD direction is used as a cutter apparatus 40 ′ for cutting the thread rubber continuous body 27 s. Rolls 41 and 42 are arranged. Further, at a position downstream of the cutter device 40 ′ in the conveying direction, as an embossing device 50 ′ (corresponding to a compressed portion forming device) for forming the embossed portion E, a rotating shaft along the CD direction is separately provided. A pair of upper and lower rolls 51 and 52 that can rotate around are arranged.
In the former cutter device 40 ′, for example, the upper roll 41 is the cutter roll 41, the lower roll 42 is the anvil roll 42 having a smooth outer peripheral surface 42a, and both the rolls 41 and 42 are in the transport direction. The drive rotation is performed so that the intermediate product 20as is sent downstream. Further, cutter blocks 43 and 43 similar to those described above are provided on the outer peripheral surface 41 a of the cutter roll 41. Therefore, when the area AL1 corresponding to the non-stretchable area AL in the intermediate product 20as passes between the two rolls 41 and 42, the cutter blade C of the cutter block 43 is opposed to the area AL1. The thread rubber continuum 27s is cut while forming the pinching marks j on the product 20as.

  On the other hand, in the latter embossing apparatus 50 ', for example, the upper roll 51 is the embossing roll 51, and the lower roll 52 is the anvil roll 52 whose outer peripheral surface 52a is smooth. Both the rolls 51 and 52 are also driven and rotated so as to send the intermediate product 20as downstream in the transport direction, and the outer peripheral surface 51a of the embossing roll 51 is provided with a projection group GT similar to that described above. Yes. Therefore, when the pinching mark j in the non-stretchable region AL passes between the two rolls 51 and 52 in the intermediate product 20as, the protrusion T of the protrusion group GT faces the pinching mark j, thereby The embossed portion E is squeezed into the intermediate product 20as so as to overlap the indentation j.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

  In the above-described embodiment, as shown in FIG. 10, a plurality of thread rubber continuums 27s, 27s... Are illustrated as the plurality of elastic members, and each of the plurality of thread rubber continuums 27s, 27s. On the other hand, the cutter blades C, C... Are provided one by one, but the present invention is not limited to this. For example, as an example of two or more, one cutter blade C may be associated with a continuous body 27s of two or three thread rubbers. That is, one cutter blade C may be provided so as to straddle two thread rubber continuums 27s, 27s or three thread rubber continuums 27s, 27s, 27s.

  In the above-described embodiment, as shown in FIG. 7B, a crimp mark j (for example, a thin portion j formed into a film) is formed as the clamp mark j at the position PC clamped by the cutter blade C. Not limited to. For example, by cutting the continuous sheets 21s and 22s of the intermediate product 20as at the same position PC, a cutting mark j (that is, a through hole penetrating in the thickness direction) may be formed as the pinching mark j. In the case of the cut mark j, the embossed portion E is formed so as to overlap the mark j, whereby the portions on both sides of the cut mark j are connected to prevent opening of the mouth.

In the above-described embodiment, the intermediate product 20as includes the continuous sheet 21s of the outer layer sheet 21 and the continuous sheet 22s of the inner layer sheet 22. However, the present invention is not limited to this. Furthermore, another continuous sheet may be laminated. Further, at least one continuous sheet 21s (22s) of the continuous sheet 21s of the outer layer sheet 21 and the continuous sheet 22s of the inner layer sheet 22 is a product pitch P1 of the diaper 1 in the conveying direction of a sheet-like sheet such as an illustration sheet. You may have laminated.
In the above-described embodiment, the continuous sheet 21s of the outer layer sheet 21 and the continuous sheet 22s of the inner layer sheet 22 are separate sheets, but the present invention is not limited to this. That is, the continuous sheet 21s of the outer layer sheet 21 and the continuous sheet 22s of the inner layer sheet 22 may be formed from the single continuous sheet by folding one continuous sheet into two.

In the above-described embodiment, each thread rubber continuous body 27s as an elastic member is cut at one position PC (FIG. 7B) in the conveying direction in the area AL1 corresponding to the non-stretchable area AL, and the cut rubber thread 27 The non-stretchable region AL is formed by contracting the region toward the region AH1 corresponding to the stretchable region AH. However, the present invention is not limited to this.
For example, as shown in FIG. 15A and FIG. 15B, in a region AL1 corresponding to the non-stretchable region AL, each thread rubber continuous body 27s is cut at a plurality of positions PC, PC. Then, the continuous rubber rubber 27s may be cut into small pieces, thereby making the area AL1 a non-stretchable area AL. In this case, the hot rubber adhesive 27s is basically applied not only to the region AH1 corresponding to the stretchable region AH but also to the region AL1 corresponding to the non-stretchable region AL. It will be glued and fixed. Further, a pinch mark j is formed at each of the positions PC, PC... And an embossed portion E (not shown in FIG. 15B) is basically formed for each pinch mark j. The However, the embossed portions E, E... Do not have to be formed for all the pinching indentations j, j..., That is, if the embossed portion E is formed for at least one pinching indentation j. For j, it is possible to prevent the mouth from opening.

  In the embodiment described above, the thread rubber continuous body 27s is exemplified as the elastic member, but the elastic member is not limited thereto. For example, a belt-like elastic member such as a flat rubber continuous body may be used.

  In above-mentioned embodiment, although the 3 piece type disposable diaper 1 was illustrated as an example of an absorbent article, it is not restricted to this at all. For example, in the two-piece type disposable diaper, the above-described apparatus 30 may perform the cutting process of the continuous thread rubber 27s and the forming process of the embossed portion E on the composite sheet corresponding to the intermediate product 20as. . Incidentally, a two-piece type disposable diaper has a two-layered exterior sheet having an abdominal part, a crotch part, and a dorsal part as a first component, and is fixed to the skin side of the exterior sheet. This is a type of diaper having a sexable main body 10 as a second part. In that case, the continuous sheet of the above-described exterior sheet corresponds to the above-described intermediate product 20as, and each of the thread rubber continuous bodies 27s, 27s... Is between two layers of the continuous sheet of the exterior sheet. Will be inserted.

  In above-mentioned embodiment, although the underpants type disposable diaper 1 was illustrated as an example of an absorbent article, it is not restricted to this at all. That is, it may be a tape-type disposable diaper. The tape-type disposable diaper has an abdominal side that covers the wearer's torso from the abdomen side and a back side that covers the torso from the back side. It is a type of diaper that uses a fastening tape to connect. Furthermore, the absorbent article is not limited to the disposable diaper 1 described above. That is, the manufacturing method and the manufacturing apparatus 30 of the present invention can be applied to any absorbent article that uses the intermediate product 20as as described above as a material. Therefore, the concept of this absorbent article includes a urine absorbing pad and a sanitary napkin.

  DESCRIPTION OF SYMBOLS 1 Disposable diaper (absorbent article), 1HB waistline opening, 1HL leg opening, 10 absorptive main body, 10ea end part, 10eb end part, 11 absorbent core, 12 covering sheet, 13 surface sheet, 15 back sheet, 15f resin Film, 15nw non-woven fabric, 17r elastic member, 20a ventral band member, 20ac center region, 20ae end, 20be end, 20as intermediate product (composite sheet), 20b dorsal band member, 21 outer layer sheet, 21p part, 21s outer layer sheet Continuous sheet (first continuous sheet), 22 inner layer sheet, 22e end, 22s inner sheet continuous sheet (second continuous sheet), 25 thread rubber, 27 thread rubber, 27s thread rubber continuous body (elastic member), 27e Cutting end, 30 device (manufacturing device), 31 rotating drum (conveying device), 31B Bearing member, 31a outer peripheral surface, 35 housing, 40 ′ cutter device, 41 cutter roll, 41a outer peripheral surface, 41A actuator, 41B bearing member, 42 anvil roll, 42a outer peripheral surface, 43 cutter block, 50 ′ embossing device (pressing part) Forming device), 51 embossing roll, 51a outer peripheral surface, 51A actuator, 51B bearing member, 52 anvil roll, 52a outer peripheral surface, C cutter blade, GC cutter blade row, j pinching mark, T protrusion, GT protrusion group, E Embossed part (pressed part), E1 polymerized embossed part (pressed part), GE1 polymerized embossed part row, E2 non-polymerized embossed part (pressed part), GE2 non-polymerized embossed part row, RE predetermined range, AU upper region, AD lower region , ADc center area, ADe end side area, AH expansion and contraction Frequency (high elasticity region), AH1 area, AL non-stretchable regions (low-stretch region), AL1 region, PC location, LSG standing gathers, LG leg gather, CL10 substantially central portion, L27 imaginary straight line, P41 position, P51 position,

Claims (9)

A method for producing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet that continues in the predetermined direction and the second continuous sheet that continues in the predetermined direction, an elastic member that extends in the predetermined direction and is inserted in the predetermined direction is inserted, at least Conveying the composite sheet fixed in the region corresponding to the high expansion / contraction region with the predetermined direction as the conveyance direction;
Forming the high stretch region and the low stretch region side by side in the transport direction on the composite sheet by sandwiching the composite sheet in a region corresponding to the low stretch region and cutting the elastic member; ,
In the formation, at least one of the narrow indentation is overlapped with at least one of the indentations formed by sandwiching the composite sheet so as to straddle the sandwich indent in the transport direction. Forming two compressed parts in the composite sheet, and a method for producing a sheet-like member according to an absorbent article. It is a manufacturing method of the sheet-like member concerning the absorptive article according to claim 1 ,
The said pressing part formed so that it may overlap with the said pinching mark is formed so that all the parts in the said pinching mark may be covered, The manufacturing method of the sheet-like member which concerns on an absorbent article characterized by the above-mentioned. It is a manufacturing method of the sheet-like member concerning the absorptive article according to claim 1 or 2 ,
In forming the squeezed part, the squeezed part is also formed at a position that does not overlap the pinched indentation,
According to the absorbent article, at least one pressing portion of the pressing portions at a position that does not overlap the pinching mark is formed at a position that does not overlap the elastic member cut in the forming. A manufacturing method of a sheet-like member. It is a manufacturing method of the sheet-like member concerning the absorptive article according to claim 3 ,
In the forming, the elastic member is cut at one place in the transport direction for each region corresponding to the low expansion / contraction region and for each elastic member, and the elastic member is a region corresponding to the high expansion / contraction region. By shrinking toward the direction, the composite sheet is formed by arranging the high stretch region and the low stretch region in the transport direction,
At least one of the squeezing parts in a position that does not overlap the elastic member is an elastic member that is cut and contracted, and the elastic members in the direction perpendicular to the transport direction are the same as each other. A method for producing a sheet-like member according to an absorbent article, wherein the sheet-like member is formed on an imaginary straight line. It is a manufacturing method of the sheet-like member concerning the absorptive article according to claim 3 or 4 ,
In the forming, the elastic member is cut at one place in the transport direction for each region corresponding to the low expansion / contraction region and for each elastic member, and the elastic member is a region corresponding to the high expansion / contraction region. By shrinking toward the direction, the composite sheet is formed by arranging the high stretch region and the low stretch region in the transport direction,
In forming the squeezed part, the squeezed part at a position overlapping the squeezing impression and the squeezing part at a position not overlapping the squeezing impression are formed in a predetermined range,
A method for producing a sheet-like member according to an absorbent article, wherein the cut end portions of the elastic member cut and contracted are positioned on both sides of the predetermined direction in the transport direction. It is a manufacturing method of the sheet-like member concerning the absorptive article according to claim 5 ,
The elastic member is a continuous thread rubber;
The absorptivity characterized in that the dimension in the conveyance direction and the dimension in the direction perpendicular to the conveyance direction of the compressed portion at a position not overlapping the pinching mark are larger than the thickness of the thread rubber when not stretched. A method for producing a sheet-like member according to an article. It is a manufacturing method of the sheet-like member concerning the absorptive article according to any one of claims 1 to 6 ,
An adhesive for fixing the elastic member to at least one of the first continuous sheet and the second continuous sheet is not applied to the position of the pressing portion formed so as to overlap the pinching mark. The manufacturing method of the sheet-like member which concerns on the absorbent article characterized. A method for manufacturing a sheet-like member according to any one of claims 1 to 7 ,
In the forming, the pinching indentation is formed in a central portion in the transport direction in a region corresponding to the low expansion / contraction region,
A method for producing a sheet-like member according to an absorbent article, wherein an absorbent core formed by molding liquid absorbent fibers into a predetermined shape is superposed on the central portion. An apparatus for manufacturing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet that continues in the predetermined direction and the second continuous sheet that continues in the predetermined direction, an elastic member that extends in the predetermined direction and is inserted in the predetermined direction is inserted, at least A conveying device that conveys the composite sheet fixed in the region corresponding to the high stretchable region, with the predetermined direction as the conveying direction;
A cutter device that forms the high stretch region and the low stretch region side by side in the transport direction on the composite sheet by sandwiching the composite sheet in a region corresponding to the low stretch region and cutting the elastic member. When,
At least one such that the cutter device overlaps at least one indentation mark formed by pinching the composite sheet, and straddles the indentation mark in the transport direction, and is connected to both sides of the narrow indentation . An apparatus for producing a sheet-like member according to an absorbent article, comprising: a compressed part forming device that forms a compressed part on the composite sheet.

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