WO2017094230A1 - 使い捨てシートおよび使い捨てシートの製造方法 - Google Patents
使い捨てシートおよび使い捨てシートの製造方法 Download PDFInfo
- Publication number
- WO2017094230A1 WO2017094230A1 PCT/JP2016/004873 JP2016004873W WO2017094230A1 WO 2017094230 A1 WO2017094230 A1 WO 2017094230A1 JP 2016004873 W JP2016004873 W JP 2016004873W WO 2017094230 A1 WO2017094230 A1 WO 2017094230A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sheet
- laminated
- fiber
- elastic member
- disposable
- Prior art date
Links
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Images
Classifications
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Definitions
- the present invention relates to a disposable sheet and a method for manufacturing the disposable sheet.
- a disposable sheet As a disposable sheet, a plurality of elastic members are arranged between two sheet materials partially bonded in a predetermined pattern so as to avoid the bonded portion, and a large number of sheet materials are used on the sheet material by using the elastic members. There has been proposed one in which the portions are regularly formed (see Patent Document 1). This disposable sheet can be employed, for example, around the waist of a disposable diaper.
- the disposable sheet disclosed in Patent Document 1 described above contributes to improving the feel and appearance of the buttocks, but has not been sufficiently studied for countermeasures against stuffiness when used in disposable diapers and the like.
- An object of the present invention is to provide a disposable sheet for suppressing dampness and a method for producing the disposable sheet when used as a dough for a disposable fiber product.
- a disposable sheet according to the first aspect of the present invention includes a breathable sheet having breathability, a fiber sheet laminated on the breathable sheet and having liquid diffusibility, the breathable sheet, and the fiber sheet.
- An elastic member bonded to at least one of the air-permeable sheet, the fiber sheet, and the elastic member are laminated to form a laminated sheet, and the laminated sheet is a fiber layer having air permeability.
- a fiber layer having liquid diffusibility are formed, and the laminated sheet has a ridge formed of an uneven surface formed by the elastic force of the elastic member.
- the method for producing a disposable sheet according to the second aspect of the present invention includes a breathable sheet having air permeability, a fiber sheet laminated on the breathable sheet and having liquid diffusibility, the breathable sheet, and the A disposable sheet comprising: an elastic member bonded to at least one of the fiber sheets, wherein the elastic member is maintained in the stretched state by applying a tensile force to the elastic member, and the breathable sheet And bonding to at least one of the fiber sheets to form a laminated sheet obtained by laminating the breathable sheet, the fiber sheet, and the elastic member, and releasing the elastic member in the stretched state from a tensile force. And shrinking the elastic member by restoration to form an uneven ridge on the laminated sheet, wherein the laminated sheet is breathable And a fiber layer having a fibrous layer and a liquid spreading of having to form a composite layer which is laminated.
- FIG. 4 is a sectional view taken along line AA in FIG. 3.
- FIG. 4 is a sectional view taken along line BB in FIG. 3.
- 1 is a drawing showing a laminated sheet of fabric 1. It is a figure which shows the space formed between a 2nd fiber sheet and a fiber sheet. It is the schematic which looked at the disposable diaper which concerns on 1st Embodiment of this invention from the skin mounting surface side. It is the figure which provided the elastic member in the outer side sheet
- FIG. 10 is a cross-sectional view taken along the line CC of FIG.
- FIG. 10 is a figure which shows the direction where elasticity acts when an elastic member is joined to an exterior sheet.
- FIG. 4 is a schematic cross-sectional view schematically showing an example of the fabric according to the first embodiment of the present invention, and is a cross-sectional view corresponding to the cross-sectional view taken along the line BB in FIG. 3.
- FIG. 4 is a schematic cross-sectional view schematically showing the fabric according to the first embodiment of the present invention, and is a cross-sectional view corresponding to the cross-sectional view taken along the line BB of FIG.
- FIG. 19A is a perspective view showing an appearance of a surface material according to a third embodiment of the present invention
- FIG. 19B is a cross-sectional view of FIG. 19A. It is a schematic diagram which shows the manufacturing apparatus of the material
- FIG. 1 to 3 show the surface state of the dough 1 according to the first embodiment of the disposable sheet of the present invention.
- 4 is a cross-sectional view taken along the line AA in FIG. 3
- FIG. 5 is a cross-sectional view taken along the line BB in FIG.
- FIG. 8 is a schematic diagram of the disposable diaper 10 of the present embodiment, and shows a case where the fabric 1 is used as the surface material 15 of the absorbent body 14 in the disposable diaper 10.
- the fabric 1 is continuous in the longitudinal direction along the surface of the fabric 1.
- the longitudinal direction of the fabric 1 is the X direction.
- the fabric 1 is formed from a laminated sheet 30 (see FIGS. 4 and 5).
- the laminated sheet 30 includes a first breathable sheet 2, a second breathable sheet 3, a first breathable sheet 2, and a first breathable sheet 2.
- 2 has a three-layer laminated structure with the fiber sheet 4 disposed between the air permeable sheets 3, and an elastic member 5 is provided between the first air permeable sheet 2 and the fiber sheet 4 as shown in FIG. Has a laminated structure.
- the laminated sheet 30 forms a composite layer in which a fiber layer having air permeability (breathable fiber layer) and a fiber layer having liquid diffusibility (liquid diffusible fiber layer) are laminated. It consists of three layers: one breathable fiber layer, a liquid diffusible fiber layer adjacent to the first breathable fiber layer, and a second breathable fiber layer adjacent to the liquid diffusible fiber layer. .
- the elastic member 5 is formed by providing a plurality of elastic bodies, and the plurality of elastic bodies are provided at intervals from each other in a direction crossing the longitudinal direction of the fabric 1. And the direction in which each elastic body extends coincides with the longitudinal direction of the fabric.
- concave and convex portions are alternately formed along the longitudinal direction of the fabric 1 to form an uneven surface.
- column which consists of the recessed part and convex part which were formed alternately along the longitudinal direction of the fabric 1 is arranged in a plurality of rows in the direction intersecting the longitudinal direction of the fabric 1 (Y direction in the example of FIG. 1). It is formed, and the collar portion is formed by the plurality of uneven rows. Further, at least a part of the adjacent concavo-convex rows is formed with a gap therebetween, and the formation position of the gap is a position corresponding to the laying position of the elastic member 5.
- Nonwoven fabrics include breathable nonwoven fabrics such as spunbond nonwoven fabric, thermal bond nonwoven fabric, spunlace nonwoven fabric, dry nonwoven fabric, wet nonwoven fabric, melt blown nonwoven fabric, chemical bond nonwoven fabric, needle punch nonwoven fabric, stitch bond nonwoven fabric, steam jet nonwoven fabric, etc. It is done.
- the fibers constituting the nonwoven fabric include natural fibers such as animal and plant fibers, synthetic fibers such as nylon, acrylic, polyolefin and polyethylene terephthalate, and regenerated fibers such as rayon. Synthetic fibers and regenerated fibers are preferable.
- the fiber sheet 4 include a sheet having liquid diffusibility such as a papermaking sheet and a paper sheet containing natural fibers such as natural pulp.
- the elastic member 5 may be formed from one elastic body.
- the elastic member 5 may be formed from an elastic sheet.
- an elastic sheet an elastic sheet formed in a lattice shape, a stretchable film, or the like may be used.
- the stretchable film a urethane film, a silicon film, an elastomer film, or the like can be used.
- the elastic member 5 may be comprised from the some elastic body.
- a linear elastic body 5a having elasticity as shown in the example of FIG. 5 or the like is preferably used, and a thread rubber is preferably used as the linear elastic body 5a.
- the cross-sectional shape of the elastic member 5 is not limited to a cylindrical shape, but may be a triangular prism shape, a quadrangular prism shape, another polygonal column shape, or an elliptical column shape.
- the external shape and the cross-sectional shape of the linear elastic member 5a are a linear shape and a cylindrical shape, and the cross-sectional shape is a circle.
- the material of the elastic member 5 is preferably formed of urethane, silicone, butadiene, synthetic rubber based on styrene / butadiene, natural rubber, or the like. A combination of materials of rubber or natural rubber may be used as appropriate.
- the linear elastic member 5a when the elastic member 5 is formed of the linear elastic member 5a, the linear elastic member 5a may be a bundle of a plurality of linear members or a twisted one (not shown).
- the fabric 1 has a three-layer structure in which the elastic member 5 is interposed between the first air permeable sheet 2 and the fiber sheet 4 as described above, and the second air permeable sheet 3 is laminated on the other surface side of the fiber sheet 4. However, it can also be set as the 2 layer structure which joined the elastic member 5 to at least one of the air permeable sheet and the fiber sheet.
- the elastic member 5 is disposed between the first air permeable sheet 2 and the fiber sheet 4.
- the elastic member 5 includes the second air permeable sheet 3 and fibers.
- the elastic member 5 is the first because of the touch and appearance. It is preferable to arrange between the first air-permeable sheet 2 or the second air-permeable sheet 3 and the fiber sheet 4.
- the elastic member may be disposed between the breathable sheet and the fiber sheet, or on the surface side of the breathable sheet. Although it may be arranged on the surface side of the sheet, it is preferably arranged between the breathable sheet and the fiber sheet in terms of touch and appearance of the fabric. Specifically, as shown in FIG.
- the elastic member 5 may be disposed between the first breathable sheet 2 and the fiber sheet 4.
- the first air-permeable sheet 2 is made of the same material as the second air-permeable sheet 3 even if it is made of the same material as the first air-permeable sheet in the three-layer fabric 1 shown in FIG. You may replace it with something.
- the laminated sheet 30 forms a composite layer in which a fiber layer having breathability (breathable fiber layer) and a fiber layer having liquid diffusibility (liquid diffusible fiber layer) are laminated. Is composed of two layers, a first breathable fiber layer and a liquid diffusible fiber layer adjacent to the first breathable fiber layer.
- the dough 1 is used for disposable articles such as disposable pants, disposable diapers, disposable diaper absorbers, sanitary products, and the like.
- the three-layer fabric 1 of the present embodiment preferably constitutes a disposable sheet so as to be disposed on the side in contact with the skin. Either the first breathable sheet 2 or the second breathable sheet 3 of the fabric 1 is used. Although the breathable sheet may be on the side in contact with the skin, it is preferable to use the second breathable sheet 3 on the skin side. In the case of a two-layer fabric, it is preferable that the breathable sheet side is the skin side.
- a sheet containing a cellulosic component for example, paper or an airlaid nonwoven fabric is used as the fiber sheet 4 in that it has liquid diffusibility with respect to body fluid.
- the first breathable sheet 2 and the second breathable sheet 3 are preferably made of a hydrophilic non-woven fabric in that they are breathable in relation to body fluids such as sweat emitted from the body.
- the first breathable sheet 2 and the second breathable sheet 3 it is preferable to use any one of a thermal bond nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, and the like.
- paper can also be used as the first air permeable sheet 2 and the second air permeable sheet 3, but at least one of the first air permeable sheet 2 and the second air permeable sheet 3 is It is preferable that it is a nonwoven fabric, and it is more preferable that both are nonwoven fabrics.
- the absorbent body 14 absorbs body fluid. Such a combination is not preferable because there is a possibility that a collapsed portion may be generated in the surface material 15 at the time.
- the second air-permeable sheet 3 and the fiber sheet 4 forming the laminated sheet 30 may be bonded in the entire area facing each other, but are preferably partially bonded to each other. . Since the second breathable sheet 3 and the fiber sheet 4 are partially joined, a space 9 (FIGS. 6 and 7) is formed by a non-joined portion formed between the second breathable sheet 3 and the fiber sheet 4. Reference) can be formed. And since such a space 9 is formed, the dough 1 becomes more excellent in moisture transpiration, heat dissipation, and moisture permeability.
- first breathable sheet 2 and the fiber sheet 4 forming the laminated sheet 30 are partially joined to each other by the elastic member 5 as shown in FIG. Since the first breathable sheet 2 and the fiber sheet 4 are partially joined, the space 40 can be formed by a non-joined portion formed between the first breathable sheet 2 and the fiber sheet 4. . And since such a space 40 is formed, the dough 1 becomes more excellent in moisture transpiration
- Adhesion, heat fusion, ultrasonic bonding, or the like is used as a method for joining the elastic member 5 in the laminated sheet 30, but adhesion is preferable from the viewpoint of ease of work.
- a hot melt adhesive may be used as the adhesive.
- a hot melt adhesive is used as the adhesive.
- the hot melt adhesive is partially applied to the fiber sheet 4. It is applied (or a hot melt adhesive may be partially applied to the second breathable sheet 3), and both are laminated and joined together. At this time, as shown in FIG.
- a non-adhesive portion 8 where the adhesive layer 7 does not exist is formed between the second air-permeable sheet 3 and the fiber sheet 4, and a space 9 is formed by the non-adhesive portion 8.
- the elastic member 5 is interposed between the first breathable sheet 2 and the fiber sheet 4, the first breathable sheet 2 and the fiber sheet 4 are joined at the location of the elastic member 5, so that the first Partial joining of the air permeable sheet 2 and the fiber sheet 4 is performed. That is, as shown in FIG. 5, hot melt adhesive is sprayed and applied to the peripheral surface of a large number of elastic members 5 arranged in parallel at predetermined intervals, and the elastic member 5 coated with the hot melt adhesive is applied.
- the fiber sheet 4 is positioned between the surface of the fiber sheet 4 and the first air-permeable sheet 2, and the elastic member 5 is sandwiched and laminated between them to be joined and integrated.
- the opposing surface of the first air-permeable sheet 2 and the fiber sheet 4 where the elastic member 5 does not exist is a non-adhesive portion 8, and a space 40 is formed by the non-adhesive portion 8. .
- the structure in which the space 40 is formed by the non-bonding portion 8 improves each function of moisture transpiration, heat dissipation, and moisture permeability in the fabric 1.
- a concavo-convex row 6 is formed that includes convex portions 6 a and concave portions 6 b that are alternately and continuously formed along the longitudinal direction of the fabric 1.
- the concavo-convex rows 6 are formed side by side in the direction crossing the longitudinal direction of the fabric 1 along the surface direction of the fabric 1 (in the example of FIG. 1, the direction orthogonal to the longitudinal direction of the fabric 1). At least some of the rows are formed with a gap therebetween.
- the portion where the gap is formed corresponds to the installation position of the elastic member 5 in the plan view of the fabric 1.
- such a plurality of uneven rows 6 form the heel portion 60.
- the length of the concavo-convex row 6 extends in one row from one end to the other end along the X direction (first direction) in FIG. 1 and FIG. It is preferable from the viewpoint that it can be used as the surface material 15 without waste to the end.
- the convex portions 6 a and the concave portions 6 b forming the collar portion 60 are formed so as to be deformable in accordance with the stretching force of the plurality of elastic members 5 in the laminated sheet 30.
- the formation pattern of the ridge portion 60 is determined by the size and pitch of the convex portions 6a and the concave portions 6b, the width of the concave and convex rows 6, the non-uniformity of the convex portions 6a and the concave portions 6b, and the like. And various conditions such as the arrangement condition of the elastic member 5 are determined.
- the elastic member 5 is a linear elastic body 5a as shown in FIGS. 1 and 2, for example, as shown in FIGS.
- the direction extending in the shape is arranged in the same direction as the longitudinal direction (X direction in FIGS. 1 and 2), and a large number of linear elastic bodies 5a are arranged in parallel at predetermined intervals. That is, a large number of linear elastic bodies 5a are arranged at intervals in the Y direction, and a linear elastic body row is formed.
- the intervals at which the linear elastic bodies 5a are provided in the Y direction may be substantially equal.
- the linear elastic bodies 5a may be densely arranged by shortening the intervals in the periphery of the fabric 1. .
- the interval may be gradually shortened from the center portion to the peripheral portion of the fabric 1. Since the linear elastic bodies 5a are densely arranged in the periphery of the fabric 1, when the fabric 1 is used as the surface material 15 of the absorbent body 14, the side of the surface material 15 has a function as a gather. . Instead of this, or in combination with this, the elastic force of the linear elastic body 5a in the peripheral part of the fabric 1 and the elastic force of the linear elastic body 5a in the central part of the cloth 1 are made different, and the peripheral part The elastic force of the linear elastic body 5a may be made stronger than the elastic force of the central linear elastic body 5a.
- the peripheral portion of the surface material 15 is a range of about 5 to 30% from the positive end in the Y direction in FIG. 8 to be described later toward the center, and the negative end in the Y direction.
- the range is about 5 to 30% from the center to the center, and the center is the range excluding both ends.
- a plurality of linear elastic bodies 5 a are provided at predetermined intervals between the first air-permeable sheet 2 and the fiber sheet 4, and adjacent linear shapes
- the interval between the elastic bodies 5a may be set as appropriate. That is, the number of the linear elastic bodies 5a per unit area can be set arbitrarily. However, if the number of the linear elastic bodies 5a is increased and the interval between the adjacent linear elastic bodies 5a is reduced, the convex portions 6a and the concave portions 6b in the one row of the concavo-convex rows 6 can be finely formed. Not only can the number of recesses serving as passages for bodily fluids such as urine and sweat be increased, but the shape can be maintained.
- the interval between the flange portions 60 that is, the pitch interval between the convex portions 6a is preferably 2.00 mm to 7.00 mm.
- the pitch interval between the convex portions 6a is more preferably 3.00 mm to 6.25 mm.
- the convex portions 6a and the concave portions 6b forming the adjacent concave and convex rows 6 are formed in a state where the convex portions 6a and the concave portions 6b forming the respective concave and convex rows 6 are continuously connected in the Y direction.
- a portion in which the convex portion 6a and the concave portion 6b are discontinuous may be generated depending on the number of the linear elastic bodies 5a, the arrangement method, and the like.
- column 6 may be formed in the state which the formation position of the convex part 6a and the recessed part 6b which form an adjacent uneven
- the collar part 60 has a part where the convex part 6a and the concave part 6b which form the adjacent uneven
- the formation pattern of the convex portions 6a and the concave portions 6b is a pattern in which the convex portions 6a and the concave portions 6b are formed at positions shifted from each other in the X direction.
- body fluid such as urine proceeds in the Y direction while branching in the X direction. Can be further enhanced.
- the fabric 1 has a laminated structure of a first air permeable sheet 2, a fiber sheet 4, and a second air permeable sheet 3, a linear elastic body 5a is used as the elastic member 5, and a thread shape is used as the linear elastic body 5a.
- An example of a method for manufacturing the fabric 1 will be described by taking as an example a case where rubber is used, an adhesive is used for joining the elastic members 5, and a hot melt adhesive is used as the adhesive.
- seat containing a cellulose-type component as the fiber sheet 4, and the point which uses a nonwoven fabric as the 1st air permeable sheet 2 and the 2nd air permeable sheet 3 respectively is preferable.
- paper is used as the fiber sheet 4 and nonwoven fabrics (for example, a thermal bond nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, etc.) are used as the first breathable sheet 2 and the second breathable sheet 3, respectively. I will give you a description.
- a fiber sheet original fabric formed of paper is fed out from a wound body on which paper (fiber sheet original fabric) serving as an original fabric of the fiber sheet 4 is wound.
- the unrolled fiber sheet is passed through an embossing roll, and the fiber sheet original is pressed between the rolls to mechanically soften the fiber sheet. Further, hot melt bonding is applied to the paper.
- the agent is applied.
- the process of mechanically softening indicates a process of making the surface state of the sheet material flexible by a mechanical action.
- the mechanical softening process is not particularly limited, and for example, an embossing process using a flat roll or an embossing process using a meshing roll having a large number of protrusions on the roll surface may be used.
- the same embossing apparatus may be used, and a plurality of types of embossing apparatuses may be provided.
- a plurality of types of embossing apparatuses are provided, as the plurality of types of embossing apparatuses, apparatuses in which the embossing direction, the shape of the embossing applied, and the size thereof are different from each other may be employed.
- the process of mechanically softening the flexibility of the fiber sheet 4 can be improved and the touch can be improved. Note that machining other than embossing may be employed for the mechanical softening process.
- the second air-permeable sheet original fabric is fed out from a wound body around which the nonwoven fabric (second air-permeable sheet original fabric) that is the original fabric of the second air-permeable sheet 3 is wound.
- This second breathable sheet original fabric is brought into a state of being overlaid on the fiber sheet original fabric coated with the hot melt adhesive, and is pressed by passing it through a pair of flat rolls. And a fiber sheet raw fabric are produced. In this joining sheet, the second breathable sheet original fabric and the fiber sheet original fabric are partially joined.
- a large number of linear elastic bodies 5a are fed out from a wound body obtained by winding a large number of linear elastic bodies 5a in parallel. At this time, the linear elastic body 5a is fed out while maintaining a state of being pulled by a predetermined pulling force (extended state).
- a hot melt adhesive is sprayed as an adhesive on the extended linear elastic body 5a. Adhesive is sprayed onto the linear elastic body 5a continuously over the entire length of the linear elastic body 5a and to the entire circumferential surface of the linear elastic body 5a.
- a non-woven fabric (first air-permeable sheet original fabric) is fed out from a wound body wound with a non-woven fabric that is a raw fabric of the first air-permeable sheet 2.
- the first air-permeable sheet original fabric is sent out so as to face the bonding sheet.
- the linear elastic body 5a coated with the adhesive as described above is sent between the joining sheet and the first air permeable sheet raw material so as to be sandwiched between the joining sheet and the first air permeable sheet raw material.
- a structure to which the linear elastic body 5a is supplied is formed. In this case, the linear elastic body 5a is supplied between the fiber sheet original fabric surface of the joining sheet and the first air-permeable sheet original fabric.
- the structure in which the linear elastic body 5a is sandwiched between the fiber sheet original fabric surface and the first breathable sheet original fabric surface of the joining sheet is passed through a flat roll.
- the joining sheet, the linear elastic body 5a, and the first air-permeable sheet original fabric are pressure-bonded to each other and laminated and integrated by the flat roll.
- the first air-permeable sheet original fabric and the fiber sheet original fabric are joined via the linear elastic body 5a, and therefore the first air-permeable sheet original fabric and the fiber sheet original fabric are partially joined.
- the second breathable sheet original fabric and the fiber sheet original fabric are partially joined, and the first breathable sheet original fabric and the fiber sheet original fabric are partially joined.
- a laminated sheet is formed.
- the raw fabric laminated sheet may be subjected to a mechanical softening treatment as necessary.
- a mechanical softening process for example, a process of passing the raw fabric laminated sheet through an embossing roll may be employed.
- the mechanical softening treatment By performing the mechanical softening treatment, the flexibility of the laminated sheet 30 formed from the raw fabric laminated sheet can be improved, and the flexibility of the fabric 1 can be further improved.
- the raw laminated sheet is subjected to a cutting process for making the length dimension in the longitudinal direction (X direction in FIGS. 1 and 2) a predetermined length.
- the fabric 1 having the first breathable sheet 2, the second breathable sheet 3, the fiber sheet 4, and the linear elastic body 5a is formed as follows.
- the linear elastic body 5a By cutting the linear elastic body 5a, the linear elastic body 5a that has been pulled is released from the tensile force, and the linear elastic body 5a contracts due to the restoring force of the linear elastic body 5a.
- the shrinkage stress accompanying the action of the restoring force of the linear elastic body 5 a acts on the first air permeable sheet 2, the second air permeable sheet 3, and the fiber sheet 4.
- the first air permeable sheet 2, the second air permeable sheet 3, and the fiber sheet 4 receive a force in a contracting direction.
- the 1st air permeable sheet 2, the 2nd air permeable sheet 3, and the fiber sheet 4 are formed flexibly, and shrink along the contraction direction of the linear elastic body 5a.
- convex portions 6 a and concave portions 6 b are formed on the surface of the first air-permeable sheet 2 to form an uneven surface.
- the convex portions 6a and the concave portions 6b are alternately formed along the contraction direction of the linear elastic body 5a to form the concavo-convex row 6.
- a plurality of concavo-convex rows 6 are formed side by side in a direction crossing the contraction direction of the linear elastic body 5a. In this way, the plurality of concave and convex rows 6 are formed, and the collar portion 60 is formed. In this way, the fabric 1 made of the laminated sheet 30 having the collar portion 60 is formed.
- the linear elastic body 5a is contracted by a restoring force, that is, in a non-tensile state, and the longitudinal direction of the linear elastic body 5a in the non-tensile state (FIG. 1, a plurality of convex portions 6a and concave portions 6b are formed side by side in the longitudinal direction of the laminated sheet 30 in FIG.
- the concavo-convex row 6 is formed in a plurality of rows in the Y direction, and the collar portion 60 is formed as a whole in plan view of the fabric 1.
- the laminated sheet 30 has a linear elastic body 5a therein, whereby an elastic force is applied to the laminated sheet 30. Accordingly, when the fabric 1 which is the laminated sheet 30 is pulled in the X direction in FIGS. 1 and 2, the linear elastic body 5a is stretched to expand the fabric 1, and when this state is released, the linear elastic body is released. 5a contracts by the restoring force, and thereby the fabric 1 also returns to its original dimensional state. As described above, since the fabric 1 has stretchability, when the fabric 1 is used as the surface material 15 of the absorbent body 14, the fit to the body is excellent. Similarly, when the fabric 1 is used as the outer sheet 11 of the disposable diaper 10, the fit to the body is excellent.
- the fabric 1 is formed such that the concavo-convex rows 6 forming adjacent rows in the heel portion 60 are formed with the formation positions of the convex portions 6a and the concave portions 6b shifted from each other in the X direction
- body fluid such as urine proceeds in the Y direction while branching in the X direction, so that the diffusibility is further improved and the side leakage prevention function can be further enhanced.
- the body fluid can quickly move from the surface material 15 to the absorbent body 14, and the time for the body fluid to stay on the surface material 15 is not lengthened, so that the surface material 15 that is less likely to cause stuffiness can be obtained. .
- the fabric 1 can be used not only as the surface material 15 of the absorbent body 14 of the disposable diaper 10 but also as the outer sheet 11.
- the outer sheet 11 sweat is generated between the outer sheet 11 and the ground. Even so, sweat tends to advance in the Y direction while branching the heel part 60 of the fabric 1 in the X direction. From this, the diffusibility is further improved, and it becomes difficult for the sweat to stay in a limited area, so that the outer sheet 11 is less likely to stuffy.
- hydrophilic nonwoven fabric for example, vinyl alcohol fibers and hydrophilic fibers from the viewpoint of adhesion with the hydraulic composition.
- Polypropylene fibers can be used as the hydrophilic fibers.
- the basis weight of each of the first air permeable sheet 2 and the second air permeable sheet 3 is preferably 10 to 50 g / m 2 as an example.
- the fiber sheet 4 When paper is used as the fiber sheet 4, a paper material formed from pulp paper or a material mainly composed of pulp can be used. Wood pulp, synthetic pulp, waste paper pulp, etc. can be used as the raw material pulp. Moreover, it is not restricted to natural fibers such as pulp, and regenerated fibers such as rayon can also be used.
- the basis weight of the third fiber sheet 4 is preferably 10 to 50 g / m 2 as an example.
- the application pattern of the adhesive in the fiber sheet 4 is not particularly limited, and examples thereof include a method of applying in a line shape, a dot shape, a stripe shape, a spiral shape, a block shape, a pattern shape, and the like. Moreover, it will be in the state by which the adhesive agent was apply
- the application pattern of the adhesive in the linear elastic body 5a is not particularly limited, and examples thereof include a method of applying in a linear shape, a dot shape, a spiral shape, a pattern shape, and the like. As the application pattern, one of them may be used, or a plurality of patterns may be used in combination.
- the dough 1 manufactured as described above is adjusted to a predetermined size and shape, and is applied to the surface material 15 and the outer sheet 11 of the disposable diaper 10.
- the laminated sheet 30 may have a three-layer configuration of the first breathable sheet 2 and the two-layer fiber sheet 4 using a fiber sheet similar to the fiber sheet 4 instead of the second breathable sheet 3. Further, the laminated sheet 30 may have a two-layer configuration of the first breathable sheet 2 and the fiber sheet 4 by omitting the second breathable sheet 3 (see FIG. 17).
- the elastic member 5 is disposed between the first breathable sheet 2 and the fiber sheet 4.
- a bonding sheet is formed by applying a hot melt adhesive to the elastic member 5 and bonding the first air-permeable sheet 2 and the fiber sheet 4, thereby reducing the bonding (bonding) process. be able to.
- Print layer 4a in the case where fabric 1 is used as outer sheet 11
- the printing layer 4a may be formed.
- the print layer 4a is formed by appropriately printing on paper.
- FIG. 8 is a schematic view of the disposable diaper 10 according to the first embodiment of the present invention as viewed from the skin wearing surface side.
- the disposable diaper 10 includes an outer sheet 11 having a moisture permeable sheet, a waist part 12, a tape part 13, an absorbent body 14, and a surface material 15.
- the outer sheet 11, the waist part 12, and the tape part 13 are the same as well-known disposable diapers, and may have other configurations (for example, gathers).
- the disposable diaper 10 shown in FIG. 8 has shown as an example the open type which a front body and a back body isolate
- separate in the part 12 may be sufficient.
- the absorber 14 absorbs a body fluid (for example, sweat, urine, blood, lymph fluid, etc.) of the user who uses the disposable diaper 10.
- the absorber 14 includes a fiber assembly made of pulp fibers and the like, a water-absorbing polymer, and the like, and these are joined to the outer sheet 11 in a state of being stored in a bag-like fiber material. For this joining, for example, joining with a hot melt adhesive or ultrasonic joining is used.
- the absorber 14 in this embodiment may be called an absorption core or an absorptive core.
- the absorbent body 14 may be joined to the outer sheet 11 after the absorbent body 14 is joined to the outer face sheet 15.
- the absorber 14 and the surface material 15 can be replaced, and the outer sheet 11 can be used a plurality of times.
- the outer sheet 11 can be used repeatedly because the fabric 1 can withstand multiple washings.
- a deodorant when the absorber 14 absorbs urine that is excretion, it is desirable to add a deodorant to the absorber 14.
- a deodorant activated carbon; zeolite; silica; ceramic; Oya stone; charcoal polymer; carbon nanotube; carbon nanohorn; organic acid such as citric acid and succinic acid;
- alum is added to at least one of the fiber assembly and the bag-like fiber material.
- a deodorant such as alum may be added in addition to the second breathable sheet 3 serving as the skin surface of the surface material 15. This is because the deodorizing liquid may use a liquid in which a metal is dissolved, so that it does not touch the user's skin directly.
- both ends in the Y direction of the surface material 15 may be joined to the outer sheet 11.
- the outer sheet 11 and the surface material 15 may be joined directly or indirectly.
- bonding may be performed via the absorber 14.
- the outer sheet 11, the absorber 14, and the surface material 15 may be press-bonded, press-cut bonded, or perforated bonded.
- the size of the surface material 15 is smaller than the size of the outer shape of the outer sheet 11 in both the X direction and the Y direction, but the length of the surface material 15 in the X direction and Y direction is set to the outer sheet 11.
- the end of the surface material 15 may be bent along the outer shape of the outer sheet 11 to wrap the outer sheet 11.
- a double-sided tape, a hook-and-loop fastener, or the like may be provided at the end portion of the surface material 15 and joined to the outer sheet 11 or may be joined by hot melt joining, ultrasonic joining, or heat seal joining.
- an adhesive such as a double-sided tape or a mechanical engagement means is provided at or near the end portion of the surface material 15, and the outer sheet 11 and the surface material 15 Can be joined.
- the surface material 15 is composed of the fabric 1 described above, and the second breathable sheet 3 comes into contact with the skin of the wearer. That is, in the present embodiment, the surface material 15 is bonded to the outer sheet 11 so that the first breathable sheet 2 is positioned on the absorber 14 side.
- the ridge portion 60 having an uneven shape is formed on the surface of the surface material 15 by the elastic force of the elastic member 5.
- embossing was performed to give the surface material of the absorber an embossed shape.
- body fluid such as urine
- FIG. 8 shows the outline
- FIG. 9 is a view in which a surface material 15 is provided on the outer sheet 11 so that the elastic member 5 is along the X direction.
- the longitudinal direction (X direction) of the outer sheet 11 and the longitudinal direction (X direction) of the fabric 1 are matched, the transport direction of the fabric 1 and the transport direction of the outer sheet 11 are determined in the manufacturing process. Match. For this reason, for example, the process of rotating the dough 1 by 90 degrees becomes unnecessary, and the apparatus scale of the manufacturing apparatus of the disposable diaper 10 can be reduced.
- the surface material 15 is Because the surface material 15 fits between the crotch due to the elastic force of the elastic member 5 that constitutes, the comfort can be improved. Furthermore, since the surface material 15 forms the collar part 60, a contact area with a user becomes small, Therefore A feeling of touch can be made favorable. Further, even when body fluid such as urine is discharged from the user, the fiber sheet 4 having better liquid permeability than the second air-permeable sheet 3 leads the body fluid to the absorbent body 14 quickly, and FIG.
- the flexible second breathable sheet 3 for example, a hydrophilic nonwoven fabric
- the surface material 15 is smooth by the ventilation
- FIG. 10 is a view in which the surface material 15 is provided on the outer sheet 11 so that the elastic member 5 is along the Y direction. Although omitted in FIG. 10, when a plurality of elastic members 5 are provided along the Y direction, a plurality of uneven rows 6 are formed along the Y direction, as is apparent from FIGS. 2 and 3. .
- the plurality of concave / convex rows 6 formed along the Y direction can prevent body fluid such as urine from flowing in the Y direction, thereby preventing side leakage of body fluid.
- FIG. 14 is a cross-sectional view taken along the line CC of FIG. 9, and as is clear from FIG. 14, the disposable diaper 10 is curved by the plurality of elastic members 5 so that the cross section is V-shaped. Specifically, both ends in the X direction (longitudinal direction) of the disposable diaper 10 are lifted in the Z direction as compared with the central portion in the X direction. Thereby, the disposable diaper 10 fits reliably to a user's lower body when it is worn by the user.
- FIG. 16 is a cross-sectional view taken along the line DD of FIG.
- the disposable diaper 10 is curved by the plurality of elastic members 5 so that the cross section is V-shaped.
- both ends of the disposable diaper 10 in the Y direction (short direction) are lifted in the Z direction as compared to the central portion in the Y direction.
- the side leak of a bodily fluid can be prevented.
- the surface material 15 is applied to a sanitary napkin
- side leakage of menstrual blood can be prevented without increasing the size of the sanitary napkin.
- the plurality of elastic members 5 are densely arranged in the peripheral portion as compared with the central portion, or the elastic force is increased. That's fine.
- the elastic force of the elastic member 5 and the arrangement (density) of the elastic member 5 are appropriately selected so as to fit the body according to the general body shape of adult men, adult women, and children (boys and girls).
- the disposable product may be designed and manufactured three-dimensionally.
- FIG. FIG. 11 is a schematic view of the disposable pants 20 according to the second embodiment of the present invention.
- the disposable pants 20 are provided on the body mounting portion 21 including a portion that covers the entire torso of the user P and lightly presses the lower abdomen, and on the + Z side (vertically upward) of the body mounting portion 21, such as rubber And a waist mounting portion 22 that is mounted around the waist of the user P.
- the fabric of at least one of the body mounting portion 21 and the waist mounting portion 22 the three-layered fabric 1 described above or the two-layered fabric as shown in FIG. You may use what added the other sheet
- the disposable pants 20 has an elastic sheet 23 stretchable between the front part and the rear part of the trunk part mounting part 21 inside the trunk part mounting part 21 (the side in contact with the body). Inside the elastic sheet 23 (on the skin contact side of the user P), an absorber 14, a surface material 15, and a liquid-impermeable back sheet are attached. Note that the elastic sheet 23 may be omitted, and the absorbent body 14, the surface material 15, and the back sheet may be directly attached to the inside of the crotch portion of the trunk portion mounting portion 21 so as to be replaceable.
- the elastic sheet 23 exerts an elastic force in the + Z direction in FIG. 11, and therefore, when the user P wears the disposable pants 20, the disposable pants 20 in the ⁇ Z direction (vertically below) due to the weight of excrement. Deviation can be suppressed.
- the disposable pants 20 shown in FIG. 11 have a function as a diaper and can be used as an adult diaper or an infant diaper.
- the bag-shaped fiber material mentioned above is used for the absorber 14.
- the fiber sheet 4 may be omitted from the surface material 15 and the liquid diffusibility of the fiber material of the absorbent body 14 may be used.
- FIG. 12 is a schematic view of the disposable diaper 25 according to the third embodiment
- FIG. 13 is a cross-sectional view taken along the line EE of FIG.
- the elastic force of the elastic member 5 is not disturbed despite the elastic member 5 being joined to the non-stretchable absorber 14.
- the bag-like fiber material has no elasticity. Even if both ends of the X direction of 15 are pulled, the elastic member 5 may not expand. In particular, as the thickness of the absorber 14 increases, the elastic member 5 becomes difficult to expand.
- the vicinity of the center of both surfaces of the absorber 14 in the plan view is joined to the surface material 15 and the outer sheet 11 by, for example, a hot melt adhesive 17. Yes.
- the elastic member 5 can be expanded centering on a junction part.
- junction part with the surface material 15 of the absorber 14 is not limited to center vicinity on the planar view of the absorber 14, It may be either one of the both ends of the absorber 14, and the single side
- the surface material 15 may not be bonded to the bag-like fiber material of the absorbent body 14, but may simply store the absorbent body 14 in a space formed between the surface material 15 and the outer sheet 11. In this case, the absorbent body 14 may omit the bag-like fiber material.
- the surface material 15 is caused by the elastic force of the elastic member 5 as shown in FIGS. 19A and 19B.
- the center portion on the skin surface side has a raised portion 18 formed so as to rise in a convex shape along the longitudinal direction.
- the elastic member 5 may be bonded to the moisture-permeable outer sheet 11, and an elastic breathable film material may be used as the outer sheet 11. If the outer sheet 11 does not have elasticity, as shown in FIG. 14, when the absorbent body 14 absorbs body fluid, the absorbent body 14 and the moisture-permeable outer sheet 11 or breathable film are absorbed by the weight of the body fluid. There is a possibility that the outer sheet 11 may be in close contact with each other, and steam may be trapped inside the outer sheet 11.
- the elastic member 5 when the elastic member 5 is joined to the outer sheet 11 having moisture permeability, an elastic force acts on the outer sheet 11 in the Z direction as shown in FIG. A (gap) 50 can be formed. Then, the steam is transmitted from the space 50 to the outside of the outer sheet 11 and the inside of the outer sheet 11 is not steamed. Furthermore, when the elastic member 5 is joined to the moisture-permeable outer sheet 11, the ridge portion formed of a plurality of irregularities is formed on the outer sheet 11, and the surface area per unit volume is larger than when the ridge portion is not formed. Since it increases, body fluids such as urine and sweat are easily vaporized, and the comfort of the disposable diapers 10 and 25 and the disposable pants 20 is improved.
- the elastic member 5 When the elastic member 5 is bonded to the outer sheet 11 having moisture permeability, the elastic member 5 of the surface material 15 may be omitted. Further, when a bag-like fiber material is used as the absorbent body 14 as described above, the fiber material 4 of the surface material 15 may be omitted.
- FIG. 20 is a schematic diagram showing the fabric 1 manufacturing apparatus 70 according to the fourth embodiment of the present invention.
- the fiber sheet wound body 71 is wound with a fiber sheet original fabric that is the original fabric of the fiber sheet 4, and the fiber sheet original fabric is fed out from the fiber sheet wound body 71.
- the original fiber sheet fed from the fiber sheet roll 71 is pressed by a pair of embossing rolls 72.
- the embossing roll 72 is a combination of an embossing roll 72-1 and an embossing roll 72-2 having a large number of protrusions on the circumferential surface of the roll.
- the embossing roll 72-1 and the embossing roll 72-2 are meshed with each other, and the fiber sheet 4 A part of the bond between fibers is broken (mechanical softening treatment). Thereby, the fiber sheet 4 can be made flexible. As a result, the air permeability of the fiber sheet 4 is improved. On the other hand, since the bonds between the fibers are broken, the fiber sheet 4 is difficult to maintain its shape, and the manufacturing apparatus 70 is not easy to convey the fiber sheet 4.
- the hot melt adhesive HM1 described above is applied to the original fiber sheet pressed by the embossing roll 72 by spraying or the like.
- the second air permeable sheet winding body 73 is wound with a second air permeable sheet raw material that is a raw material of the second air permeable sheet 3. Sex sheet material is fed out.
- the fiber sheet original fabric coated with the hot melt adhesive HM1 and the second air permeable sheet original fabric fed from the second air permeable sheet roll 73 are laminated and pressed by a pair of flat rolls 74.
- the flat roll 74 is composed of a combination of a rubber roll 74-1 and a rubber roll 74-2, and the fiber sheet 5 and the second air permeable sheet 3 are integrally joined by the hot melt adhesive HM1 to form an integral structure. .
- the lamination sheet obtained by this be a 1st lamination sheet.
- the first laminated sheet is pressed by a pair of rolls 75.
- One of the rolls 75 is a metal embossing roll 75-1, and is made of, for example, iron, stainless steel, or aluminum.
- the embossing roll 75-1 has a linear concave portion and a convex portion that are parallel to the central axis thereof, and is repeatedly formed on the circumferential surface.
- the other of the rolls 75 is a rubber roll 75-2.
- a linear concave part and a linear convex part are repeatedly formed in the conveyance direction in the direction orthogonal to the conveyance direction.
- the first laminated sheet pressed by the roll 75 is pressed by the pair of rolls 76.
- One of the rolls 76 is a metal embossing roll 76-1, and is made of, for example, iron, stainless steel, or aluminum.
- the embossing roll 76-1 has a circular concave portion and convex portion that are orthogonal to the central axis thereof, and is repeatedly formed on the peripheral surface along the central axis.
- the other of the rolls 76 is a rubber roll 76-2.
- the first laminated sheet pressed by the roll 76 is repeatedly formed in a direction in which a linear concave portion and a linear convex portion are orthogonal to the transport direction in the transport direction.
- the first laminated sheet pressed by the roll 76 is pressed by a pair of flat rolls 77.
- One of the flat rolls 77 is a rubber roll 77-1, and the other is a metal (iron, stainless steel, or aluminum) roll 77-2.
- the rubber roll 77-1 is disposed above the metal roll 77-2.
- the metal roll 77-2 having high hardness is pushed into the surface of the rubber roll 77-1 having low hardness.
- the first laminated sheet is also pushed into the rubber roll 77-1 by the metal roll 77-2, the first laminated sheet can be pressed with a curved surface, and has the flexibility of being held by hand. Can do.
- a plurality of linear elastic bodies 5 a are wound around the linear elastic body wound body 78 in parallel, and the plurality of linear elastic bodies 5 a are fed out from the linear elastic body wound body 78. At this time, the plurality of linear elastic bodies 5a are stretched by being pulled at a predetermined stretching magnification.
- the hot-melt adhesive HM2 described above is applied to the entire peripheral surface of the linear elastic body 5a drawn out from the linear elastic body wound body 78 by spraying or the like.
- the first air permeable sheet winding body 79 is wound with the first air permeable sheet raw material that is the original fabric of the first air permeable sheet 2. Sex sheet material is fed out.
- the plurality of linear elastic bodies 5a to which the hot melt adhesive HM2 is applied and stretched are stretched between the first breathable sheet original fabric and the fiber sheet original fabric of the first laminated sheet. These are arranged in a predetermined arrangement pattern, are stacked and pressed by a pair of flat rolls 80. Thereby, the 1st lamination sheet, the linear elastic body 5a, and the 1st breathable sheet original fabric are joined together, and the 2nd joined sheet which has an integral structure is formed. Since the fiber sheet original fabric and the first air permeable sheet original fabric are bonded via the linear elastic body 5a coated with the hot melt adhesive HM2, these are partially bonded, and the second laminated sheet It can contribute to improvement of air permeability and flexibility.
- One of the flat rolls 80 is a rubber roll 80-1, and the other is a metal (iron, stainless steel, or aluminum) roll 80-2.
- the rubber roll 80-1 is disposed above the metal roll 80-2.
- the second laminated sheet pressed by the flat roll 80 is pressed by the pair of flat rolls 81.
- the flat roll 81 is the same as the flat roll 80.
- the second laminated sheet pressed by the flat roll 81 is pressed by the flat roll 82.
- the flat roll 82 is a combination of a metal roll 82-1 and a metal roll 82-2. These metal rolls 82-1 and 82-2 are made of, for example, iron, stainless steel, or aluminum. However, the flat roll 82 is not necessarily provided.
- the softening agent 83 is applied to the second laminated sheet pressed by the flat roll 82 by spraying or the like.
- the coating amount is, for example, about 8 to 12 g / m 2 .
- the softening agent 83 include a surfactant-containing solution, and the surfactant is not particularly limited, but a cation (cation) surfactant or the like is preferable.
- the second laminated sheet coated with the softening agent is pressed while being heated by the plurality of hot rolls 84 and 85. At least one roll of the heat roll 84 is heated, and the second laminated sheet is heated.
- the heat rolls 84-1 and 84-2 are both heated.
- the second laminated sheet is wound around a heat roll 84-2 disposed below, and subsequently wound around a heat roll 84-1 disposed above. That is, the second laminated sheet passes through the heat roll 84-2 to the heat roll 84-1. For this reason, the rotation direction of the heat roll 84 and the other rolls is opposite.
- the heat roll 85 is the same as the heat roll 84.
- the second laminated sheet to which the softening agent 83 is applied is pressed while the heat rolls 84 and 85 are heated, so that the softening agent 83 penetrates to the back of the second laminated sheet, and the second laminated sheet Flexibility can be improved.
- the second laminated sheet heated and pressed by the hot rolls 84 and 85 is pressed by the three rolls 86 and 87. Since the three-roll 86 includes a large-diameter rubber roll 86-1 and two small-diameter rubber rolls 86-2 and 86-3, the second laminated sheet is passed twice through the three-roll 86 once. A pressing effect is obtained.
- the second laminated sheet pressed by the three rolls 87 is pressed by the pair of rolls 88.
- One of the rolls 88 is a metal embossing roll 88-1, and is made of, for example, iron, stainless steel, or aluminum.
- the embossing roll 88-1 has a linear concave portion and a convex portion that are parallel to the central axis thereof, and is repeatedly formed on the peripheral surface.
- the other is a rubber roll 88-2.
- linear concave portions and linear convex portions are repeatedly formed in the transport direction in a direction orthogonal to the transport direction.
- the roll 88 is not necessarily provided.
- the second laminated sheet is pressed while having an uneven surface in each roll after the roll 80, the uneven surface after pressing is changed into a flat shape immediately after being crushed by the roll. Thereafter, when the force for pulling the linear elastic body 5a is released, the second laminated sheet contracts due to the restoring force of the linear elastic body 5a, forms an uneven surface again, and is pressed again.
- the second laminated sheet can be made flexible.
- static electricity generated in the second laminated sheet can be suppressed. When static electricity is generated, the surface of the second laminated sheet becomes fuzzy, and the appearance and the feeling of touch are deteriorated, which can be avoided.
- the second laminated sheet pressed by a plurality of flat rolls is dried by the dryer 90. Drying is preferably hot air drying. By drying the second laminated sheet, the linear elastic body 5a can be contracted and the restoring force can be recovered.
- the 2nd lamination sheet which passed through the above process is cut and obtained as cloth 1.
- pressure, rotation speed, material, etc. can be set as appropriate, and whether or not it can be used can also be set.
- Comparative measurement example 1 As the fabric in Comparative Measurement Example 1, a hydrophilic nonwoven fabric constituting the surface of the absorbent body of the disposable diaper A manufactured by another company was collected, and this nonwoven fabric was used as a breathable sheet. In addition, this test piece does not have a fiber sheet and an elastic member.
- Comparative measurement examples 2 to 5 As the fabrics in Comparative Measurement Examples 2 to 5, hydrophilic nonwoven fabrics constituting the surfaces of the absorbents of disposable diapers B to E made by other companies were collected, and the collected nonwoven fabrics were used as breathable sheets. In addition, this test piece does not have a fiber sheet and an elastic member.
- the water-absorbing quick-drying property was evaluated comprehensively for both the water-absorbing property and the quick-drying property by a transpiration property (II) test (Boken standard BQEA028).
- the transpiration rate is 30% or less even after 60 minutes, and in the comparative measurement examples 1 and 5, 20 minutes.
- the transpiration rate is less than 15% after a lapse, and the transpiration rate is 40% or less even after 60 minutes, whereas in the measurement example 1, the transpiration rate exceeds 20% after 10 minutes, and 20 minutes.
- the transpiration rate exceeds 40%, after 30 minutes, the transpiration rate exceeds 70%, after 40 minutes, the transpiration rate exceeds 85%, after 50 minutes, the transpiration rate exceeds 90%, 60 It can be seen that the transpiration rate exceeded 95% after minutes passed.
- the transpiration rate for 20 minutes after the start of the test is preferably 50% or more for woven fabrics and 40% or more for knits for sports applications, It is said that 40% or more of the woven fabric and 30% or more of the knitted fabric are preferable.
- the fabric 1 of Measurement Example 1 has a transpiration rate of 45% or more, it can be said that it can be comfortably worn for both sports use and general use.
- the moisture permeability was evaluated by determining the moisture permeability (g / m 2 ⁇ h) according to A-1 method (calcium chloride method) of JIS-L1099 (2012).
- moisture permeability is defined as the value which converted the mass (g) of the water vapor which permeate
- a hygroscopic agent is put in a moisture permeable cup that has been preheated to about 40 ° C., and the moisture permeable cup is made uniform by vibrating, and then the surface is flattened with a spoon, and moisture is absorbed using a circular plate.
- the distance between the agent and the lower surface of the test piece was adjusted to 3 mm.
- test body Place the surface of each test piece concentrically with respect to the moisture permeable cup with the surface facing the hygroscopic agent, attach the packing and ring in sequence, secure with the wing nut, and seal the mounting side with vinyl adhesive tape.
- a test body was obtained. The test body was placed at a position where the wind speed about 10 mm above the test piece in the constant temperature / humidity device at a temperature of 40 ° C. ⁇ 2 ° C. and humidity (90 ⁇ 5)% RH did not exceed 0.8 m / s. After 1 hour, the test specimen was taken out, and the mass (a1) was immediately measured up to 1 mg.
- Moisture permeability PA1 (g / m 2 ⁇ h) (a2 ⁇ a1) / SA1 (2)
- a2-a1 is the amount of change (g / h) in mass per hour of the specimen
- SA1 is the moisture permeable area (m 2 ).
- test result was expressed by rounding to an integer according to the rule (rounded off method) of the average value JISZ8401 of 3 times.
- the obtained results are shown in Table 2.
- the fabric 1 of Measurement Example 1 has good moisture permeability.
- Table 3 shows the moisture permeability evaluation results and the transpiration evaluation results after 20 minutes and 60 minutes.
- the dough 1 of Measurement Example 1 has a higher transpiration rate than the functional dough materials of Comparative Measurement Examples 1 to 5, and has a plurality of transpiration rates. Despite the layer structure, the moisture permeability is not inferior. For this reason, since the cloth 1 of Measurement Example 1 has a high transpiration rate, it is comfortable to wear.
- the arrangement form of the linear elastic body 5a is not limited to a continuous one extending linearly in the X direction, and may be an intermittent linear elastic body 5a, or a curved linear elastic body 5a that is curved. They may be arranged in parallel, or may be arranged in such a manner that the corrugated linear elastic bodies 5a are irregularly arranged.
- each linear elastic body 5a may be a combination of linear elastic bodies 5a having different expansion / contraction ratios.
- the elastic member 5 is not limited to a linear shape, and a sheet-like elastic body provided with a large number of holes or notches and having a predetermined air permeability can also be used.
- the surface material 15 of each of the above embodiments may be applied to sanitary napkins, underwear, clothes side pads, and the like. Furthermore, you may sell combining a normal underwear, a bra, a hat, etc., and the fabric 1. In this case, the fabric 1 may be sold as a set of a plurality of pieces according to the shape of the crotch portion of the underwear, or the fabric 1 may be processed by the user (cut with scissors). You may have perforations for.
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Abstract
Description
図1~図3は、本発明の使い捨てシートの第1実施形態に係る生地1の表面状態を示す。また、図4は、図3のA-A線断面図であり、図5は、図3のB-B線断面図である。また、図8は、本実施形態の使い捨ておむつ10の概要図であり、生地1を使い捨ておむつ10における吸収体14の表面材15として用いた場合を示す。
図1において、生地1は、その生地1の面に沿った長手方向に連続するものである。図1の例では、生地1の長手方向は、X方向である。生地1は、積層シート30(図4、図5参照)から形成されており、積層シート30は、第1通気性シート2と、第2通気性シート3と、第1通気性シート2及び第2通気性シート3の間に配置された繊維シート4との3層の積層構造を有し、図5に示すように、第1通気性シート2と繊維シート4との間には弾性部材5が配置された積層構造を有している。積層シート30は、通気性を有する繊維層(通気性繊維層)と液拡散性を有する繊維層(液拡散性繊維層)とが積層された複合層を形成しており、複合層は、第1の通気性繊維層と、この第1通気性繊維層と隣り合う液拡散性繊維層と、この液拡散性繊維層と隣り合う第2の通気性繊維層との3層から構成されている。
第1通気性シート2、第2通気性シート3としては、不織布や多孔質シート、これらの積層体等が挙げられる。不織布としては、スパンボンド不織布、サーマルボンド不織布、スパンレース不織布、乾式不織布、湿式不織布、メルトブロー不織布、ケミカルボンド不織布、ニードルパンチ不織布、ステッチボンド不織布、スチームジェット不織布等の通気性を有する不織布等が挙げられる。不織布を構成する繊維としては、動植物繊維等の天然繊維、ナイロン、アクリル、ポリオレフィン、ポリエチレンテレフタレート等の合成繊維、レーヨン等の再生繊維等が挙げられるが、合成繊維、再生繊維が好ましい。また繊維シート4としては、天然パルプ等の天然繊維を含む抄造シート、紙シート等の液拡散性を有するシートが挙げられる。
弾性部材5は、1つの弾性体から形成されてよい。例えば、弾性部材5は、弾性シートから形成されてもよい。弾性シートとしては、格子状に形成された弾性シートや、伸縮性フィルムなどが用いられてもよい。伸縮性フィルムとしては、ウレタンフィルム、シリコンフィルム、エラストマーフィルム等を用いることができる。また、弾性部材5は、複数の弾性体から構成されていてもよい。例えば、弾性部材5として、図5等の例に示すような伸縮性を有する線状弾性体5aが好適に用いられ、この線状弾性体5aとして糸状ゴムが好適に用いられる。弾性部材5の断面形状は、円柱状に限らず、三角柱状、四角柱状、その他の多角柱状、又は、楕円柱状でもよい。なお、図5の例では、線状弾性部材5aの外観形状及び横断面形状については、外観形状は、線状形状かつ円柱形状であり、横断面形状は円形となっている。
図4、図5の例において、積層シート30を形成する第1通気性シート2と繊維シート4は、弾性部材5を介して部分的に接合されている。
例えば、第2通気性シート3と繊維シート4とを、接合した部分と接合しない部分とが形成されるように部分的に接合一体化した後に、第2通気性シート3と繊維シート4の積層体に対して弾性部材5を介在させつつ第1通気性シート2を積層して接合する。このような接合を実施することで、第1通気性シート2と繊維シート4と第2通気性シート3の積層一体化構造が形成され、且つ、第1通気性シート2と繊維シート4の間に弾性部材5を介在させて部分的に接合されることで、本実施形態の積層シート30が形成されることとなる。
積層シート30における弾性部材5の接合方法としては接着、熱融着、超音波接合等が用いられるが、作業上の容易さの観点から接着が好ましい。
また、積層シート30を形成する第1通気性シート2と繊維シート4の接合方法としては、積層シート30における弾性部材5の接合方法として使用可能な方法を適宜選択可能である。
生地1においては、図2から図4に示すように、複数の凸部6aと凹部6bが形成されており、生地1に凹凸面が形成されている。生地1においては、生地1の長手方向に沿って交互に連続形成された凸部6aと凹部6bとからなる凹凸列6が形成されている。凹凸列6は、生地1の面方向に沿って生地1の長手方向を横断する方向(図1の例では生地1の長手方向に直交する方向)に複数並んで形成されており、隣り合う凹凸列の少なくとも一部が互いに隙間をあけて形成されている。生地1の平面視上、隙間の形成された部分が、弾性部材5の設置位置に対応する。そして、生地1においては、このような複数の凹凸列6が襞部60を形成している。凹凸列6の長さは、図1および図2におけるX方向(第1方向)に沿って一端から他端まで一列に延びていることが、生地1をその長手方向に沿った一方端から他方端まで無駄なく表面材15として利用可能な観点からは好適である。
生地1においては、襞部60の形成パターンは、凸部6aと凹部6bの大きさやピッチ、凹凸列6の幅、凸部6aと凹部6bの不均一性などによって定められ、これらは弾性部材5の選択や、弾性部材5の配置条件などの諸条件に応じて定められる。
生地1を製造する方法について、次に一例を挙げて説明する。ここでは、生地1が第1通気性シート2、繊維シート4、第2通気性シート3の積層構造を有し、弾性部材5として線状弾性体5aが用いられ、線状弾性体5aとして糸状ゴムが用いられ、また弾性部材5の接合に接着剤が用いられ、且つ、接着剤としてホットメルト接着剤が用いられている場合を例にとり、生地1の製造方法の一実施例を説明する。
生地1を吸収体14の表面材15として用いる場合、第2通気性シート3は、パルプ繊維などからなる繊維集合体、及び、吸水性ポリマーを含む吸収体14と接する。このため、積層シート30は、第2通気性シート3の代わりに繊維シート4と同様の繊維シートを用い、第1通気性シート2と2層の繊維シート4の3層構成とされてよい。また、積層シート30は、第2通気性シート3を省略して第1通気性シート2と繊維シート4の2層構成とされてもよい(図17参照)。これらの場合には、第1通気性シート2と繊維シート4との間に弾性部材5が配置される。また、これらの場合、弾性部材5にホットメルト接着剤を塗布して、第1通気性シート2と繊維シート4とを接合すれば接合シートが形成されることから、接着(接合)工程を減らすことができる。
生地1を使い捨ておむつ10の外側シート11や、図11に示す使い捨てパンツ20の外装体に用いる場合には、意匠性を向上させる観点からは、繊維シート4となる紙に予め印刷層4a(図6参照)が形成されていてもよい。印刷層4aは、紙にプリントを適宜施すことで形成される。
本発明の第2実施形態では、第1実施形態において説明した吸収体14と、表面材15とを使い捨てパンツ20に適用する場合について説明する。図11は、本発明の第2実施形態に係る使い捨てパンツ20の概要図である。使い捨てパンツ20は、使用者Pの胴部全体を覆い、その下腹部を軽く押圧する部分を含む胴部装着部21と、胴部装着部21の+Z側(鉛直上方)に設けられ、ゴム等の弾性部材を含み、使用者Pの腰回りに装着される腰部装着部22とを有する。この胴部装着部21と腰部装着部22の少なくとも一方の生地として前述した3層構成の生地1や、図17に示したような2層構成の生地を使用してもよく、生地1に更に他のシートを追加したものを使用してもよい。
本発明の第3実施形態は、弾性部材5の弾性力の有効利用を図る場合について説明する。
図20は、本発明の第4実施形態に係る生地1の製造装置70を示す模式図である。以下、製造装置70による生地1の製造方法について図20を用いて説明する。繊維シート巻回体71には、繊維シート4の原反となる繊維シート原反が巻回されており、繊維シート巻回体71から繊維シート原反が繰り出される。繊維シート巻回体71から繰り出された繊維シート原反は、一対のエンボスロール72によって押圧される。エンボスロール72は、ロール周面に多数の突起を有するエンボスロール72-1及びエンボスロール72-2の組み合わせであり、エンボスロール72-1とエンボスロール72-2が互いにかみ合って、繊維シート4における繊維同士の結合の一部を破壊する(機械的柔軟化処理)。これにより、繊維シート4を柔軟にすることができる。この結果、繊維シート4の通気性が向上する。一方で、繊維同士の結合が破壊されるため、繊維シート4が形状を維持しにくくなり、製造装置70は繊維シート4を搬送することが容易ではなくなる。
以下、上述した生地1の各種物性の測定例について説明する。
本測定例1における生地1の通気性シートとしては親水性の不織布を用い、繊維シートとしてはパルプ100%の紙(トイレットペーパー用の紙シート)を用い、弾性部材としては、径620デシテックスのウレタンゴムを用いた。ウレタンゴムにホットメルト接着剤を塗布して、ウレタンゴムを介して親水性の不織布とパルプ100%の紙とを部分的に接合し、試験片とした。
比較測定例1における生地としては、他社製使い捨ておむつAの吸収体の表面を構成している親水性の不織布を採取し、この不織布を通気性シートとした。なお、この試験片は繊維シート、弾性部材を有していない。
比較測定例2~5における生地としては、他社製使い捨ておむつB~Eの吸収体の表面を構成している親水性の不織布をそれぞれ採取し、採取した各不織布を通気性シートとした。なお、この試験片は繊維シート、弾性部材を有していない。
蒸散率(%)={(W0-Wt)/(W0-W)}×100・・・・(1)
結果を表1に示す。
式(2)において、a2-a1は、試験体の1時間当たりの質量の変化量(g/h)であり、SA1は、透湿面積(m2)である。
2 第1繊維状シート
3 第2繊維状シート
4 繊維材料
5 弾性部材
6 襞部
10、25 使い捨ておむつ
14 吸収体
15 表面材
20 使い捨てパンツ
Claims (14)
- 通気性を有する通気性シートと、
前記通気性シートに対して積層し、液拡散性を有する繊維シートと、
前記通気性シート及び前記繊維シートの少なくとも一方に接合される弾性部材と、
を具備し、
前記通気性シート、前記繊維シート及び前記弾性部材は、積層して接合した積層シートを形成し、前記積層シートは、通気性を有する繊維層と液拡散性を有する繊維層とが積層された複合層を形成し、かつ、前記積層シートは、前記弾性部材の弾性力によって形成される凹凸面からなる襞部を有する使い捨てシート。 - 前記弾性部材が線状弾性体よりなる請求項1記載の使い捨てシート。
- 前記弾性部材は、伸縮方向とは異なる方向に間隔を開けて配置された複数の線状弾性体よりなる請求項1記載の使い捨てシート。
- 前記積層シートにおける前記通気性シートと前記繊維シートとは、前記弾性部材を介して接合部、非接合部を形成して積層され、前記非接合部に空間部が形成されている請求項1記載の使い捨てシート。
- 前記弾性部材は、少なくとも前記積層シートの中央部付近に設けられている請求項1記載の使い捨てシート。
- 前記襞部を形成する凹凸は、前記弾性部材の伸縮方向に沿って複数繰り返し形成されている請求項1記載の使い捨てシート。
- 前記弾性部材は、伸長状態で前記通気性シート及び前記繊維シートの少なくとも一方に接合され、接合後に弾性収縮している請求項1記載の使い捨てシート。
- 前記繊維シート側に、更に他の通気性シートが積層して接合された請求項1記載の使い捨てシート。
- 前記他の通気性シートと、前記繊維シートとが部分的に接合されている請求項8記載の使い捨てシート。
- 液性の物質を吸収する吸収体の表面に積層され、前記吸収体の表面材として用いられる請求項1記載の使い捨てシート。
- 通気性を有する通気性シートと、
前記通気性シートに対して積層し、液拡散性を有する繊維シートと、
前記通気性シート及び前記繊維シートの少なくとも一方に接合される弾性部材と、
を具備する使い捨てシートを製造する方法であって、
前記弾性部材に引っ張り力を加えて伸長状態に維持しながら、前記弾性部材を前記通気性シート及び前記繊維シートの少なくとも一方に接合させ、前記通気性シート、前記繊維シート及び前記弾性部材を積層して接合した積層シートを形成するステップ、
伸張状態にあった前記弾性部材を引っ張り力から解放して前記弾性部材を復元により収縮させて、前記積層シートに凹凸の襞部を形成させるステップ、
とを含み、
前記積層シートは、通気性を有する繊維層と液拡散性を有する繊維層とが積層された複合層を形成する、
使い捨てシートの製造方法。 - 前記繊維シートの一方の面に第1の通気性シートを接合した後、前記繊維シートの他方の面側に前記弾性部材と第2の通気性シートとを積層して接合した積層シートを形成する請求項11記載の使い捨てシートの製造方法。
- 前記繊維シートにエンボス処理を施した後、前記繊維シートに前記第1の通気性シートを接合する請求項12記載の使い捨てシートの製造方法。
- 前記弾性部材を伸長状態で前記通気性シートと前記繊維シートとの間に挟み込んだ積層シートを、ロール間を通して押圧して接合する請求項11記載の使い捨てシートの製造方法。
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JPS63211302A (ja) * | 1986-12-02 | 1988-09-02 | ペアウドウス | おむつおよびその連続製造法 |
JP2001095837A (ja) * | 1999-09-29 | 2001-04-10 | Uni Charm Corp | 積層パネル |
JP2002000654A (ja) * | 2000-06-20 | 2002-01-08 | Pigeon Corp | バックシート |
JP2006027089A (ja) * | 2004-07-16 | 2006-02-02 | Kao Corp | 複合伸縮部材及びその製造方法 |
JP2009148447A (ja) * | 2007-12-21 | 2009-07-09 | Kao Corp | 伸縮性複合シート及びその製造方法 |
JP2010005926A (ja) * | 2008-06-26 | 2010-01-14 | Kao Corp | 伸縮シート |
JP2014180823A (ja) * | 2013-03-19 | 2014-09-29 | Oji Holdings Corp | エンボスシートの製造方法及びエンボス加工装置 |
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JPS63211302A (ja) * | 1986-12-02 | 1988-09-02 | ペアウドウス | おむつおよびその連続製造法 |
JP2001095837A (ja) * | 1999-09-29 | 2001-04-10 | Uni Charm Corp | 積層パネル |
JP2002000654A (ja) * | 2000-06-20 | 2002-01-08 | Pigeon Corp | バックシート |
JP2006027089A (ja) * | 2004-07-16 | 2006-02-02 | Kao Corp | 複合伸縮部材及びその製造方法 |
JP2009148447A (ja) * | 2007-12-21 | 2009-07-09 | Kao Corp | 伸縮性複合シート及びその製造方法 |
JP2010005926A (ja) * | 2008-06-26 | 2010-01-14 | Kao Corp | 伸縮シート |
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