CN109069326B - absorbent articles - Google Patents
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- CN109069326B CN109069326B CN201780025873.XA CN201780025873A CN109069326B CN 109069326 B CN109069326 B CN 109069326B CN 201780025873 A CN201780025873 A CN 201780025873A CN 109069326 B CN109069326 B CN 109069326B
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- absorbent body
- sap
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/531—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad
- A61F13/532—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
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- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Absorbent Articles And Supports Therefor (AREA)
Abstract
本发明的吸收性物品(10)具备液体透过性的正面片材(14)、液体不透过性的背面片材(12)、及配设于正面片材(14)与背面片材(12)之间且包含纸浆(29)及SAP(27)的吸收体(13)，在吸收体(13)的正面片材(14)侧，排列有多个由将正面片材(14)与吸收体(13)压缩而形成的多个凹部(21)所构成且相互交叉的压缩行(22)，压缩行(22)的包含交叉区域(23)的区域中的吸收体(13)的纸浆量/SAP量的值大于包含该交叉区域(23)的区域以外的压缩行(22)中的吸收体(13)的纸浆量/SAP量的值。
The absorbent article (10) of the present invention includes a liquid-permeable topsheet (14), a liquid-impermeable backsheet (12), and a topsheet (14) and a backsheet (12) disposed on the topsheet (14). 12), the absorber (13) including pulp (29) and SAP (27) is arranged on the side of the front sheet (14) of the absorber (13) by a plurality of the front sheet (14) and the A compressed row (22) formed by a plurality of recesses (21) formed by compression of the absorber (13) and intersecting with each other, the pulp of the absorber (13) in the region of the compressed row (22) including the intersecting region (23) The value of Amount/Amount of SAP is greater than the value of Amount of Pulp/Amount of SAP of the absorber (13) in the compressed row (22) other than the region including the intersection region (23).
Description
Technical Field
The present invention relates to an absorbent article, and more particularly to a disposable diaper or absorbent pad.
Background
In absorbent articles such as disposable diapers (hereinafter, also simply referred to as "diapers"), various improvements have been made to improve their functions and wearing comfort.
The absorbent article absorbs a large part of discharged body fluid through the absorbent body. Here, since the diaper covers the abdomen, hip, and crotch, it is affected by various body movements, particularly leg movements, such as walking, turning, and baby crawling. In particular, the absorbent body may wrinkle, bend, or break due to various movements of the body. In this case, fit between the crotch of the diaper is reduced, and leakage is likely to occur. Further, when the content of a Super Absorbent Polymer (hereinafter also referred to as "SAP") in the Absorbent material is increased in order to improve the absorption retention of the Absorbent material, the flexibility of the Absorbent material itself tends to be lost.
Therefore, as seen in patent document 1, there is an article in which the skin contact surface side of the absorbent body is embossed by oblique lattice-like compressed grooves extending obliquely with respect to the direction from the front body to the back body of the diaper. By embossing the absorbent body in this manner, the fit of the diaper between the crotch can be improved to follow the back and forth movement of the legs or the curvature of the buttocks, and leakage of body fluid can be suppressed.
Such embossing is performed by rotating an embossing roller having an embossing pattern protruding from the surface of the absorbent sheet over a long length of the absorbent sheet. In the production of diapers, an embossing roller is rotated on a long absorbent sheet or the like to perform embossing, and then various sheets are subjected to operations such as lamination and cut into a desired size.
[ Prior art documents ]
[ patent document ]
[ patent document 1] Japanese patent laid-open No. 2015-016218
Disclosure of Invention
Problems to be solved by the invention
In order to prevent the grooves from being crushed even when pressure due to the weight of the wearer is applied, a compressed groove has been proposed in which the absorbent body is more difficult to crush by compressing the topsheet together with the absorbent body from the topsheet (topsheet) side disposed on the skin contact surface side of the absorbent body. In this case, as described above, the compressed groove is formed by rotating the embossing roller on the absorbent body on which the top sheet is laminated. When the compressed grooves are formed in this manner, the topsheet or the like positioned on the upper layer than the absorbent body is recessed into the grooves by the rotation of the embossing roller, and the topsheet or the like is likely to be in a strongly stretched state. In particular, the embossed pattern of the component extending in an oblique direction, such as a diagonal lattice shape, has a portion where the distance between compressed points is shortened (the interval is narrowed) while the intersection region of the lattice is present. At the same time, if the distance between the compressed points is short, the force of stretching the front sheet from both the adjacent compressed points acts strongly, and the front sheet is likely to be in a strongly stretched state. In this case, the powder-like SAP in the absorbent body is pressed against the front sheet, and therefore the front sheet in the crossing region is easily broken at the embossing.
The present invention has been made in view of such problems, and an object thereof is to: provided is an absorbent article which is improved in the feeling of use by the wearer by making the intersecting regions of an absorbent body having a lattice-like embossed pattern less likely to break and easily bend.
Means for solving the problems
In order to achieve the above object, an absorbent article of the present invention includes a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body including pulp and SAP disposed between the topsheet and the backsheet, wherein compressed rows each including a plurality of concave portions formed by compressing the topsheet and the absorbent body and intersecting each other are arranged on the topsheet side of the absorbent body, and a value of pulp amount/SAP amount of the absorbent body in a region including an intersection region of the compressed rows is larger than a value of pulp amount/SAP amount of the absorbent body in a compressed row other than the region including the intersection region.
Effects of the invention
As described above, according to the present invention, it is possible to provide an absorbent article in which the intersecting region of the absorbent body formed with the lattice-like embossed pattern is less likely to break and is more likely to bend, thereby improving the feeling of use of the wearer.
Drawings
Fig. 1 is a perspective projection view showing an appearance of an embodiment in which the absorbent article of the present invention is applied to an open-type disposable diaper.
Fig. 2 is a partially broken plan view of the diaper shown in fig. 1, as viewed from the skin contact surface side.
Fig. 3 is a cross-sectional view of the diaper shown in fig. 2 cut along line iii-iii.
Fig. 4 is a perspective view showing the diaper shown in fig. 1 in an exploded state.
Fig. 5 is a partial plan view of the absorbent part of the diaper shown in fig. 1, viewed from the topsheet side.
Fig. 6 is an enlarged partial top view of a portion of the compressed row in fig. 5.
Fig. 7 is a sectional view taken along line VII-VII of fig. 6.
Fig. 8 is a sectional view taken along line VIII-VIII of fig. 6.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, and other absorbent articles falling under the concept of the present invention are also included.
[ embodiment 1]
Fig. 1 is a perspective view of an open-type disposable diaper (so-called sheet-type disposable diaper) according to embodiment 1 of the present invention, as viewed from the front side. Fig. 2 is a plan view of the diaper shown in fig. 1, as viewed from the skin contact surface side. Fig. 3 shows a sectional view of fig. 2 taken along the line iii-iii. Fig. 4 shows a divided state obtained by cutting and spreading the unfolded disposable diaper shown in fig. 1 and 2.
The open-type disposable diaper (hereinafter, may be simply referred to as a diaper) 10 in the present embodiment includes a front body region 10F, a rear body region 10R, and a crotch region 10C connecting the front body region 10F and the rear body region 10R. Further, a waist opening 10W is formed in a portion surrounding the waist of the wearer when the wearer wears the front body section 10F and the back body section 10R. Similarly, a pair of left and right leg hole openings 10L are formed to surround the thigh portions of the legs of the wearer with the lower ends of the front body region 10F and the rear body region 10R and the crotch region 10C.
When the diaper 10 is worn, the front body panel region 10F is positioned on the ventral side of the wearer, and the rear body panel region 10R is positioned on the back side of the wearer. Then, the crotch region 10C covers the crotch of the wearer, and the legs of the wearer pass through the pair of left and right leg hole openings 10L. Therefore, the leg hole openings 10L are located at arbitrary positions from the base of the legs to the periphery of the thighs of the wearer.
A line along the body center axis from the head to the crotch of the wearer when the diaper 10 is worn in the correct orientation is used as the virtual line P in the following description as needed. As shown in fig. 1, an imaginary line P extends through the crotch portion from the stomach side to the back side in the central portion of the diaper 10. Specifically, for example, when the waist portion side of the diaper 10 is taken as the upper side and the crotch lower side is taken as the lower side, the virtual line P extends in the up-down direction along the front of the diaper 10 and also extends in the up-down direction on the back side via the crotch portion. In other words, the vertical direction is a direction along the body center axis from the head to the crotch of the wearer, and the virtual line P extends along the body center axis.
A pair of left and right fastening tapes 10A are joined to both left and right end edges of the back sheet region 10R of the covering sheet 11 positioned outside the diaper 10, and these fastening tapes 10A overlap both left and right end edges of the front sheet region 10F when worn and connect both, thereby forming the leg hole openings 10L. The fastening tape 10A is joined to the front adhesive sheet 10B joined to the covering sheet 11 in the front body region 10F so as to be repeatedly releasable therefrom. An elastic sheet 10D is joined to the upper end of the back body region 10R of the covering sheet 11, and the elastic sheet 10D extends in the width direction of the covering sheet 11 to give the wearer a moderate wearing sensation around the waist.
As shown in fig. 2 to 4, the diaper 10 of the present embodiment is formed by sequentially overlapping and joining a cover sheet 11, a liquid impermeable back sheet (back sheet) 12, an absorbent body 13 (hereinafter, also simply referred to as an absorbent body 13) wrapped with a core sheet (tissue) 15, which is a hydrophilic thin sheet, and a top sheet (topsheet) 14 in contact with the skin of the wearer, from the outside when viewed from the skin side of the wearer.
A pair of semicircular notches 11A, which form leg openings 10L, are formed on both left and right sides of the crotch region 10C of the cover sheet 11. A liquid-impermeable back sheet 12 is joined to the covering sheet 11, a conventional absorbent body 13 is disposed between the back sheet 12 and a liquid-permeable top sheet 14, and the top sheet 14 is joined to the back sheet 12 via the absorbent body 13. Rubber threads 16 for forming leg gathers are joined in an extended state to the vicinities of the centers of both left and right side edge portions in the width direction of the back sheet 12.
The liquid-permeable topsheet 14 of the present embodiment includes a pair of liquid-impermeable (or water-repellent) side sheets 18 that form three-dimensional gathers at both lateral edges in the width direction. The pair of side sheets 18 are members as described below: the outer edge portion is formed in the same shape as the pair of cutout portions 11A of the cover sheet 11, and stands along both left and right side edge portions of the absorbent member 13 when worn, to prevent leakage of urine excreted by the wearer. In each of the pair of side sheets 18, a rubber thread 19 as a three-dimensional drape stretchable member is arranged in an extended state so as to be folded back and held at the inner edge portion toward the absorbent body 13, and when the rubber thread 19 is contracted, the side sheet 18 is raised in the direction in which the skin of the wearer is in contact. The three-dimensional gathers can be formed in a known manner as used in known disposable diapers. For example, the water repellent sheet can be formed by sandwiching and fixing a stretched three-dimensional wrinkle stretchable material between layers of a water repellent sheet. As shown in fig. 2, the side sheet 18 is pulled in the longitudinal direction by the expansion and contraction of the rubber thread 19. As shown in fig. 3, the inner edge portion is formed as a standing three-dimensional fold.
The diaper 10 of the present embodiment is an article in which the absorbent body 13 is elongated along the imaginary line P, and the longitudinal direction thereof is parallel to the imaginary line P. The direction perpendicular to the virtual line P is defined as the width direction. The ratio of the longitudinal direction to the width direction of the diaper 10 is not limited to the present embodiment. The ratio can be appropriately changed according to the body shape of the wearer.
Next, the structure of the absorber portion in the present embodiment will be described.
Fig. 5 is a partial plan view of the absorbent member 13 and the topsheet 14 when viewed from the topsheet 14 side.
The absorber 13 of the present embodiment located below the top sheet 14 mainly includes pulp (indicated by reference numeral 29 in fig. 7 and 8 described below) and SAP (indicated by reference numeral 27 in fig. 7 and 8 described below). The absorbent member 13 is formed in an elongated shape so as to extend over the front body, crotch, and rear body. And is divided into three parts of a front body part M1, a crotch part M2, and a rear body part M3. In the crotch portion M2, a pair of arcuate cutouts 13A are formed in comparison with a pair of left and right leg openings 10L surrounding the thigh portions of both legs. The notch 13A may not be formed corresponding to the size of the absorbent body 13. The absorbent body 13 of the present embodiment is an hourglass-shaped article having the notch 13A and a central portion having a narrower width than the front and rear ends, but the shape of the absorbent body of the present invention is not limited to this. The shape of the back-and-forth (up-and-down) portion may be a shape in which the corners of the front-and-back (up-and-down) ends are cut into a curved shape, an oval shape extending back-and-forth (up-and-down), a circular shape, a rectangular shape having a length in the front-and-back (up-and-down) left-and-right directions of the same degree, or the like.
Further, the absorbent body 13 is wrapped with, for example, a core sheet 15 in order to maintain its shape, and the core sheet 15 is a hydrophilic thin sheet whose ends are joined to each other by coating paste. The absorbent body 13 wrapped with the core sheet 15 is disposed between the back sheet 12 and the top sheet 14. The top sheet 14 is joined to the back sheet 12 via the absorbent body 13 wrapped with the core sheet 15. In the present embodiment, the absorbent body 13 wrapped with the core sheet 15 is used, but the absorbent body in the present invention may not be wrapped with the core sheet.
As shown in fig. 5, the diaper 10 has a compressed part forming region (embossed pattern forming region) N1 which is formed by compressing the topsheet 14 from the surface toward the absorbent member 13 by regular embossing. In the compressed portion forming region N1, a plurality of compressed lines 22 are arranged and extended, and the compressed lines 22 are formed by a plurality of concave portions 21 formed continuously by compression, and the plurality of concave portions 21 are arranged in a diagonal lattice pattern. The plurality of compression rows 22 are interdigitated. Further, in the region where the compression rows 22 are not formed among the compression portion forming regions, a non-compressed main absorbent region 25 is mainly provided. As shown in fig. 5, the embossed pattern is not formed at both ends of the absorbent body 13. Therefore, the absorbent body 13 has a compressed part non-forming region (embossed pattern non-forming region) N2 on both sides of the compressed part forming region (embossed pattern forming region) N1. The purpose is as follows: body fluid is prevented from leaking from the leg hole openings 10L along the embossed pattern.
In the present embodiment, the embossed pattern is formed up to the upper end of the front body panel portion M1 and the lower end of the rear body panel portion M3. By forming the embossing pattern in this manner to the upper and lower ends, there is produced an effect that the air permeability of the diaper 10 is improved and the absorbent body 13 becomes easily flexed to fit the diaper 10 to the body of the wearer. In the present invention, the emboss pattern may be formed not to the upper end of the front body section M1 and the lower end of the back body section M3 of the absorbent body 13, or to the left and right ends of the absorbent body 13.
The concave portion 21 in the present embodiment is inclined with respect to a virtual line P along the central axis of the body of the wearer when the diaper is worn. Specifically, the recess 21 includes a right recess 21a inclined in the right direction in the drawing with respect to the virtual line P in the 1 st direction at a predetermined angle α, and a left recess 21b inclined in the left direction in the drawing with respect to the virtual line P in the 2 nd direction at a predetermined angle β. The recesses 21 inclined in the same direction are arranged in a row with the diagonal line of the lattice 1 as the length L1, and are formed with a lattice-like embossed pattern extending obliquely. In the present embodiment, the predetermined angle α and the predetermined angle β are set to the same value, but they may be set to different values. In the present embodiment, the plurality of concave portions 21 are formed by collectively compressing the top sheet 14, the core sheet 15, and the absorber 13 on the top sheet 14 side. In the present invention, the absorbent body 13 may be embossed together with the top sheet 14 as in the present embodiment, or the top sheet 14 may be attached to the embossed absorbent body 13 subsequently.
As shown in fig. 5, a line formed by arranging the plurality of right-direction concave portions 21a is defined as a 1 st compression line 22a, and a line formed by arranging the plurality of left-direction concave portions 21b is defined as a 2 nd compression line 22 b. These compression rows 22 are straight lines inclined at the same angle as the inclination angle of the concave portion 21 with respect to the virtual line P. The 1 st compression row 22a extends parallel spaced apart from one another by a spacing S1. Further, the 2 nd compression row 22b extends in parallel with each other at the interval S2. In this way, the 1 st compression row 22a and the 2 nd compression row 22b are extended to form a diagonal lattice-shaped emboss pattern. In the present embodiment, the 1 st compression row 22a and the 2 nd compression row 22b intersect with each other, and thus the intersection region 23 is formed. In the present embodiment, the intervals S1 and S2 are set to the same value, but they may be set to different values.
In the present invention, the value of the pulp amount/SAP amount of the absorbent body 13 in the region including the intersecting region 23 of the compressed row 22 is larger than the value of the pulp amount/SAP amount of the absorbent body 13 in the compressed row 22 other than the region including the intersecting region 23. Fig. 6 is an enlarged schematic view of a part of the compressed line of the circle Q portion in fig. 5. Fig. 7 is an enlarged schematic view of a cross-sectional shape taken along line VII-VII in fig. 6, and fig. 8 is an enlarged schematic view of a cross-sectional shape taken along line VIII-VIII in fig. 6. Fig. 5 and 6 are drawn with the side sheet 18 omitted for convenience. In fig. 7 and 8, the SAP27 constituting the absorbent body 13 is shown in a substantially star shape, and the pulp 29 constituting the absorbent body 13 is shown in a linear or dotted shape.
The embossing process for forming the concave portions 21 is a process of interposing an adhesive (for example, a hot melt adhesive) between the top sheet 14 and the absorbent member 13 and compressing the top sheet 14 and the absorbent member 13 together from the surface of the top sheet 14. The concave portion 21 is formed by compressing the top sheet 14 together with the absorbent body 13 from the surface of the top sheet 14 by a predetermined die formed on an embossing roller.
In the pressing by the embossing roller, the pressure is concentrated on the deepest position of the concave portion 21, and the absorbent body 13 and the top sheet 14 are strongly compressed. During this compression, the SAP27 of the absorbent body 13 is deformed so as to wrap the fibers of the pulp 29 and is firmly entangled, and a thin bottom is formed in a state in which both are integrated. In this way, the absorber 13 is strongly compressed in the concave portion 21, and the absorber 13 forms a thin bottom portion, whereby the shape of the concave portion 21 is clearly maintained. For example, even when the wearer performs a sitting action or the like and pressure due to the weight of the wearer is applied to the surface of the absorbent member 13, the concave portion 21 is not crushed and maintains its shape. Even if the diaper 10 is strongly stretched by various motions of the legs, the SAP27 is deformed so as to wrap the fibers of the pulp 29, and the concave portions 21 can maintain their shapes. In the present embodiment, the recess 21 is formed in a one-step structure, but may be formed in a multi-step structure having two or more steps. By forming the multi-step structure, the protrusions corresponding to the recesses of the lowest step can be provided in the embossing die to be locally compressed strongly, thereby forming the portions where the top sheet 14 and the absorber 13 are firmly joined, and preventing the occurrence of defects such as breakage of the top sheet 14 during the production.
In the present embodiment, the recessed portions 21 of the cross-hatched embossed pattern are formed by pressing while rotating an embossing roller having a die formed on the surface thereof so as to fit the recessed portions 21. As shown in fig. 5, when the embossing roller travels in the direction of the arrow W (the direction from the front body section M1 toward the back body section M3) while rotating, all the portions of the concave sections 21 arranged in the direction perpendicular to the traveling direction W of the embossing roller are simultaneously pressed. In the present embodiment, the size of the corrugated roll is determined so that the circumference of the corrugated roll corresponds to the length of the absorbent body 13 in the longitudinal direction, but the present invention is not limited thereto.
In the present embodiment, the traveling direction W of the embossing roller is parallel to the direction of the imaginary line P when the diaper 10 is completed. As described above, the topsheet 14 is laminated on the absorbent member 13 cut in the size of the diaper 10, and the topsheet 14 is compressed together with the absorbent member 13 by the embossing roller. Since the cutting is performed over the length of the front, crotch, and back parts of the diaper 10, the running direction W of the embossing roller is also parallel to the virtual line P, whereby an oblique-lattice-shaped embossing pattern inclined with respect to the virtual line P can be formed.
When the embossing roller is pressed deep to form the concave portion 21, the top sheet 14 is further drawn, and therefore the top sheet 14 may be damaged. However, if the concave portions 21 are formed by pressing only the embossing roller shallowly, the adhesion effect between the top sheet 14 and the absorbent body 13 is weakened, and the top sheet 14 is easily peeled from the absorbent body 13, and even a clear embossed pattern cannot be formed.
Therefore, the concave portions 21 of the present embodiment enter the intersection regions 23 where the SAP amount is low while the distance between the adjacent right concave portions 21a and left concave portions 21b is short, and thus the concave portions 21 are formed without strongly stretching the top sheet 14. This reduces the number of the absorber 13 pressed in, and thus the top sheet 14 is less likely to be broken. Further, the top sheet 14 can be prevented from being peeled from the absorbent body 13 while maintaining the flexibility of the top sheet 14 and the absorbent body 13.
As shown in fig. 7, the cross-sectional shape near the recess 21 is such that the open end is wider than the bottom. Further, unlike the case of fig. 8 described below, in the nip compressed line 22a and the non-nip main absorbent region 25, the values of the pulp amount/SAP amount of the absorbent body 13 are equal. Here, the portion indicated by reference numeral 13D is a multi-SAP nip portion in which the value of the pulp amount/the SAP amount in the absorbent body 13 is small (i.e., the ratio of the SAP amount is large) and which is subjected to nip. The portion indicated by reference numeral 13E is a multi-SAP non-nip portion in which the value of the pulp amount/SAP amount in the absorbent body 13 is small and is not nipped. That is, the multiple SAP embossed portion 13D indicates the concave portion 21 other than the intersection region 23, and the multiple SAP non-embossed portion 13E indicates the absorber 13 in the main absorbent region 25. The SAP-rich nip 13D and the SAP-rich non-nip 13E are both regions having smaller values of pulp amount/SAP amount than the absorbent body 13 (the SAP-less nip 13F described below) in the cross region 23.
Here, the absorbent body 13 mainly contains SAP27 and pulp 29 as described above, and the density is mainly related to the fiber density of the pulp 29. Therefore, the multi-SAP nip portion 13D is in a state where the pulp 29 is compressed and the gap between the pulp 29 is small, while the multi-SAP non-nip portion 13E is in a state where the gap between the pulp 29 is larger than the multi-SAP nip portion 13D. In the present invention, the density of the intersection region 23 may be lower than that of the region other than the region where the compressed rows are formed, but may be higher than or equal to that.
Further, since the recesses 21 are formed in a film shape by compression-bonding the top sheet 14, which is a synthetic fiber, together with the absorbent body 13, which is mainly composed of pulp 29, the bottom surfaces of the recesses 21 promote the diffusion of the body fluid in the extending direction of the compression rows 22 until the body fluid is absorbed.
As shown in fig. 8, in the compression row 22a, the value of the pulp amount/SAP amount of the absorbent body 13 in the intersecting region 23 is larger than the value of the pulp amount/SAP amount of the absorbent body 13 (multi-SAP nip 13D) in the region where the concave portions 21 are formed other than the intersecting region 23. Here, the crossing area 23 indicated by reference numeral 13F is a low-SAP nip portion in which the value of the pulp amount/the SAP amount in the absorbent body 13 is large (i.e., the ratio of the SAP amount is small) and which is subjected to nip. That is, the low SAP press part 13F indicates the intersection region 23 and a region where the value of the pulp amount/the SAP amount is larger than the concave part 21 other than the intersection region 23.
Further, the absorbent body 13 has a pulp layer in contact with the top sheet 14, and the basis weight of pulp of the pulp layer in the crossing area 23 may be formed higher than the basis weight of pulp of the pulp layer in the compression row 22 outside the crossing area 23. Further, the basis weight of the SAP of the absorbent body 13 in the intersecting region 23 may be formed lower than the basis weight of the SAP of the absorbent body 13 in the compressed row 22 other than the intersecting region 23.
By thus changing the ratio of the pulp amount in the compression row 22 of the absorbent body 13, the value of the pulp amount/SAP amount of the absorbent body 13 (low-SAP nip 13F) in the crossing region 23 is increased, and the SAP27 can be covered with the pulp 29. Therefore, the SAP27 is prevented from hitting the top sheet 14 to cause breakage of the top sheet 14 at the crossing areas 23 at the embossing process. Further, by forming the SAP27 so as not to easily hit the topsheet 14 in the crossing regions 23, the absorbent body 13 in the crossing regions 23 can be prevented from being easily broken by the action of the wearer. Further, since the top sheet 14 in the cross region 23 is less likely to be broken as described above, the absorbent member 13 can be pressed deeply during the embossing process, and a clear embossed pattern can be formed. By forming a clear embossing pattern, the ease of folding and flexibility of the diaper 10 can be improved. In the present invention, the basis weight of the pulp layer in the crossing region 23 may be made higher than the basis weight of the pulp layer in the compression rows 22 other than the crossing region 23, or the basis weight of the SAP of the absorbent body 13 in the crossing region 23 may be made lower than the basis weight of the SAP of the absorbent body 13 in the compression rows 22 other than the crossing region 23. With this configuration, the diaper 10 can be similarly improved in the ease of folding and flexibility.
In the present embodiment, the "low SAP pressure nip 13F" is provided, for example, by: the absorbent body 13 is sandwiched by the mold, and thereby an impact is given to the SAP27, and the SAP27 is scattered.
The "SAP-less nip 13F" is formed by, for example, the following steps (1) to (6). The absorbent pad (in the description of this step, an absorbent body without core pieces is indicated) is formed by mixing pulp with SAP in powder form and blowing the resulting mixture towards a filter of, for example, 2 forming drums.
(1) First, an absorbent body base pad having a constant thickness is produced by a first forming roll 1.
(2) Next, only a pulp layer (for example, in the form of longitudinal stripes parallel to the running direction W shown in fig. 5) is intermittently produced by the 2 nd forming roll so as to form a pulp layer at a portion corresponding to the "SAP-less nip 13F", and the pulp layer is laminated on the absorbent body base pad produced in the step (1).
(3) Then, the absorbent body base pad laminated in step (2) is wrapped with the core sheet 15, and the core sheet 15 and the absorbent body base pad are adhered by a hot melt adhesive or the like to produce the absorbent body 13.
(4) The absorbent body 13 thus produced was cut into a size of one diaper.
(5) The top sheet 14 is laminated on the cut absorbent body 13.
(6) The top sheet 14 and the absorbent body 13 are compressed together by an embossing roll so that the cross regions 23 are arranged in the pulp layer.
In the present embodiment, the value of the pulp amount/SAP amount of the absorbent body 13 (low-SAP nip 13F) in the crossing region 23 of the compression row 22 is larger than the value of the pulp amount/SAP amount of the absorbent body 13 (high-SAP nip 13D) in the compression row 22 other than the crossing region 23. However, in the present invention, the value of the pulp amount/SAP amount of the absorbent body 13 may be made larger not only in the intersecting region 23 but also in the region including the periphery of the intersecting region 23. Further, the "periphery of the intersection region 23" is not limited to the compressed region, and may include an uncompressed region. The "compressed region" refers to, for example, a region that has not been compressed to the same extent as the compressed line 22.
In order to improve the fit, there is known an article obtained by embossing the skin contact surface side of the absorbent body with compressed grooves in a diagonal lattice shape extending obliquely with respect to the direction from the front body to the back body of the diaper. The compressed grooves themselves are located at a lower position than the uncompressed portion and therefore do not directly contact the skin of the wearer, but the vicinity of the lattice points, i.e., the periphery of the intersection region of the lattices, is fixed in a state in which the topsheet and the absorbent body are stretched and strongly stretched. Therefore, there is a case where the powdered SAP in the absorbent body hits against the top sheet. In this way, the periphery of the intersection region of the lattice on the skin contact surface of the topsheet becomes a relatively hard portion compared with other portions, for example, the rough feeling of the SAP is transmitted as a texture.
The periphery of the cross region of the lattice is not preferable because it comes into contact with the skin of the wearer, which gives the skin of the wearer a firm and rough touch. In particular, since the diaper is in contact with a soft skin portion such as a crotch, a soft skin touch is required, and if the periphery of the intersection portion of the lattice is hard, the touch in contact with the skin is not preferable.
Referring to fig. 6, the right recess 21a is inclined to the right with respect to the traveling direction W, and the left recess 21b is inclined to the left. Therefore, as the embossing roller travels in the traveling direction W, the distance between the adjacent right-direction recessed portions 21a and left-direction recessed portions 21b becomes shorter as it goes to the intersection region 23.
When the embossing roller forming the concave portion 21 presses, the top sheet 14 is stretched so as to be drawn into the concave portion 21. Since the adjacent right-direction concave portions 21a are formed by being pressed simultaneously with the left-direction concave portions 21b, the top sheet 14 therebetween is stretched from the left and right. That is, in fig. 6, the top sheet 14 is stretched by applying a pulling-in force indicated by an arrow a simultaneously to the left and right. As the distance between the adjacent right-direction concave portion 21a and left-direction concave portion 21b becomes shorter, the allowance of the top sheet 14 with respect to the pulling force a becomes smaller, and thus the top sheet 14 is gradually strongly stretched. Therefore, the SAP27 in the absorbent body 13 hits against the topsheet 14, and a rough feel is imparted to the surface of the topsheet 14. This is not preferable because it causes irritation to the skin of the wearer.
In another embodiment of the present invention, a region where the value of the pulp amount/SAP amount is large is provided not only in the intersection region 23 but also in the periphery thereof. According to this configuration, the following can be suppressed: the rough feel of SAP27 is transmitted as a hand because the periphery of intersection area 23 is in contact with the wearer's skin, giving the wearer a firm and rough feel to the skin. As a result, the corner portions formed in the intersecting region 23 are not hardened and the feel is improved, and the surface of the top sheet 14 is in a smooth state, thereby improving the feeling of use of the wearer.
Next, an embodiment of an embossed pattern formed by embossing will be described.
As shown in fig. 5, the embossing pattern of the present embodiment is a lattice shape formed by arranging a plurality of continuously extending concave portions 21, and the concave portions 21 are arranged so that the length of a diagonal line L1 of a lattice 1 becomes 42mm (4.2 cm). As shown in fig. 6, the width Q1 of the compressed row 22 is 3mm, preferably 2mm to 5 mm. As shown in fig. 5 and 6, the embossing pattern of the present embodiment is such that the 1 st compressed line 22a extends in parallel at an interval S1, and the 2 nd compressed line 22b extends in parallel at an interval S2. Then, the 1 st compression line 22a and the 2 nd compression line 22b form a diagonal lattice-like embossed pattern. The lengths S1 and S2 of 1 side of the lattice in this embodiment are equal and 29.7 mm. The interval between the grids is preferably 13.0mm to 54.0 mm.
Here, the depth of the concave portion 21 of the absorber 13 is D1, the thickness of the absorber 13 and the top sheet 14 before embossing, that is, the maximum thickness of the main absorbent region 25 including the absorber 13 and the top sheet 14 is D2, the thickness of the diaper 10 having the concave portion 21 is D3, and the thickness of the absorber 13 having the concave portion 21 is D4. In the present embodiment, the depth D1 of the recess 21 is 7.8 mm. The thickness D2 is 8.0mm, preferably 5.0mm to 20.0 mm. The thickness D3 is 1.0mm, and the thickness D4 is preferably 0.2mm to 0.6 mm.
In this way, the depth D1 of the recess 21 is about 42.5% to 97.5% of the thickness D2. As described above, the concave portions 21 in the present embodiment are formed by compressing the absorbent body 13 in the direction of the back sheet 12 during the pressing by the embossing roller.
The value of the pulp amount/SAP amount of the absorbent body 13 (the low-SAP nip 13F) in the crossing region 23 of the present embodiment is 1.0, preferably 0.9 to 1.1. The value of the pulp amount/SAP amount of the absorbent body 13 (multi-SAP nip 13D) in the region other than the crossing region 23 of the compression row 22 is 0.8, preferably 0.7 to 0.9.
By forming the absorber 13 at such a ratio of the amount of pulp, the SAP27 of the crossing area 23 can be covered with the pulp 29. Therefore, the intersecting region 23 of the absorbent body 13 having the lattice-like embossed pattern formed therein is less likely to be broken, and the feeling of use of the wearer can be improved.
By forming the concave portions 21 at such a depth and interval, the groove can be maintained even if a body weight is applied, and a soft skin touch feeling can be maintained on the skin contact surface at the crotch portion of the diaper. Therefore, the inclined lattice-like embossed pattern can suppress deformation such as wrinkling of the diaper due to various movements of the legs, and can make the skin feel soft.
[ modified examples ]
The present invention is not limited to the above-described embodiments, and can be appropriately modified or changed within a range not departing from the technical spirit of the present invention.
For example, in the above-described embodiment, the case where the embossing is performed using an embossing roller has been described, but the embossing is not limited to this method, and may be a method of embossing the diaper in units of the size of the diaper by a plate-like embossing plate that matches the size of the diaper.
Further, the topsheet 14 may be disposed not only after the absorbent member 13 is wrapped with the hydrophilic sheet, but also directly on the absorbent member 13. Further, a liquid diffusion sheet for improving liquid diffusibility may be provided between the top sheet 14 and the hydrophilic sheet. Body fluid is more easily diffused by the sheet. The hydrophilic sheet may be attached so as to wrap the absorbent body 13, or may be disposed so as to overlap only the front and back surfaces without wrapping the end of the absorbent body 13.
In the above embodiment, the compressed rows 22 are formed by the concave portions 21 as continuous grooves, but the compressed rows 22 may be formed by discontinuous (for example, intermittent) grooves. The shape of the recess 21 is not limited to the shape shown in the present embodiment, and various shapes such as a quadrangle, a circle, an ellipse, and a triangle can be used.
The disposable diaper 10 of the above embodiment can be applied to both adults and children. In the above-described embodiment, the open-type diaper 10 (so-called sheet-type diaper) is described as an example, but it is needless to say that the present invention is also applicable to a pants-type diaper. The absorbent article of the present invention is not limited to diapers, and can be applied to all of various other general absorbent articles such as absorbent pads and urine leakage pads. For example, as shown in fig. 5, the present invention can be applied to an absorbent pad or the like, having the same operational effects as a diaper, depending on the configurations of the absorbent body 13 and the topsheet 14 portion.
In the above embodiment, only one side of the absorbent body 13 is embossed, but the present invention is not limited to this, and both sides may be embossed. That is, the concave portions 21 are formed on both the front and back surfaces of the absorber 13 by embossing from both the top sheet 14 side and the back sheet 12 side. Thus, the pressure is not concentrated on only a single surface of the front and back surfaces of the absorbent body 13, and therefore, even if it is not pressed deeply in the embossing process, the compressed lines 22 can be clearly formed, and the flexibility of the diaper 10 can be maintained.
Description of the reference numerals
10 Disposable diaper
10A magic tape
10B front adhesive sheet
10F front body area
10R posterior segment region
10C crotch area
10W waist opening
10L leg opening
10D elastic sheet
11 cover sheet
11A, 13A notch part
12 bottom sheet (Back sheet)
13 absorbent body
14 Top sheet (front sheet)
15 core-spun sheet
16. 19 rubber thread
18 side sheet
21 concave part
21a Right concave part (concave part inclined to the 1 st direction)
21b left concave part (concave part inclined to the 2 nd direction)
22 compressed line
23 cross region
25 main absorption area
27 SAP
29 pulp
S1 Forming intervals of multiple No. 1 compression lines
S2 Forming intervals of multiple No. 2 compression rows
Q1 compressed line width
Depth of D1 recess
Thickness of the main absorbent region D2
Thickness of diaper with D3 recess
Thickness of absorber having D4 concave portion
Diagonal of L11 grid.
Claims (9)
1. An absorbent article comprising a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body comprising pulp and SAP and disposed between the topsheet and the backsheet,
a plurality of compression lines intersecting each other are arranged on the topsheet side of the absorbent body, the compression lines being formed of a plurality of concave portions formed by compressing the topsheet and the absorbent body,
the value of the pulp amount/SAP amount of the absorber in the region of the compression row including the intersecting region is larger than the value of the pulp amount/SAP amount of the absorber in the compression row other than the region including the intersecting region.
2. The absorbent article of claim 1,
the absorbent body has a pulp layer in contact with the topsheet,
the basis weight of the pulp layer in the area comprising the crossing area is higher than the basis weight of the pulp layer in the compression row outside the area comprising the crossing area.
3. The absorbent article according to claim 1 or 2, wherein,
the basis weight of the SAP of the absorbent body of the area comprising the crossing-over area is lower than the basis weight of the SAP of the absorbent body in the compressed row outside the area comprising the crossing-over area.
4. The absorbent article according to claim 1 or 2, wherein,
the value of the pulp amount/SAP amount of the absorbent body in the region including the intersecting region and the region of the periphery of the intersecting region is larger than the value of the pulp amount/SAP amount of the absorbent body in the compressed row other than the region including the intersecting region and the region of the periphery of the intersecting region.
5. The absorbent article according to claim 3, wherein,
the value of the pulp amount/SAP amount of the absorbent body in the region including the intersecting region and the region of the periphery of the intersecting region is larger than the value of the pulp amount/SAP amount of the absorbent body in the compressed row other than the region including the intersecting region and the region of the periphery of the intersecting region.
6. The absorbent article according to claim 1 or 2, wherein,
the plurality of recesses are continuous grooves.
7. The absorbent article according to claim 3,
the plurality of recesses are continuous grooves.
8. The absorbent article according to claim 4,
the plurality of recesses are continuous grooves.
9. The absorbent article according to claim 5,
the plurality of recesses are continuous grooves.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-089481 | 2016-04-27 | ||
| JP2016089481A JP6380454B2 (en) | 2016-04-27 | 2016-04-27 | Absorbent articles |
| PCT/JP2017/014582 WO2017187945A1 (en) | 2016-04-27 | 2017-04-07 | Absorbent article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109069326A CN109069326A (en) | 2018-12-21 |
| CN109069326B true CN109069326B (en) | 2021-04-09 |
Family
ID=60161618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780025873.XA Active CN109069326B (en) | 2016-04-27 | 2017-04-07 | absorbent articles |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6380454B2 (en) |
| CN (1) | CN109069326B (en) |
| RU (1) | RU2708269C1 (en) |
| TW (1) | TWI612949B (en) |
| WO (1) | WO2017187945A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020054783A1 (en) * | 2018-09-14 | 2020-03-19 | 王子ホールディングス株式会社 | Absorbent article production method |
| JP2024048964A (en) | 2022-09-28 | 2024-04-09 | 大王製紙株式会社 | Absorbent articles |
| JP2024124805A (en) | 2023-03-03 | 2024-09-13 | 大王製紙株式会社 | Absorbent articles |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3811000B2 (en) * | 2000-11-30 | 2006-08-16 | ユニ・チャーム株式会社 | Disposable diapers |
| JP4278962B2 (en) * | 2002-01-23 | 2009-06-17 | ユニ・チャーム株式会社 | Absorber and absorbent article using said absorber |
| JP4540629B2 (en) * | 2005-03-24 | 2010-09-08 | 花王株式会社 | Absorbent articles |
| JP5401177B2 (en) * | 2009-06-04 | 2014-01-29 | 花王株式会社 | Absorbent articles |
| MY167152A (en) * | 2009-05-20 | 2018-08-13 | Kao Corp | Absorbent body and absorbent article |
| JP5847999B2 (en) * | 2010-09-30 | 2016-01-27 | ユニ・チャーム株式会社 | Pants-type diapers |
| MY163522A (en) * | 2010-12-24 | 2017-09-15 | Kao Corp | Absorbent body and absorbent article |
| JP5703043B2 (en) * | 2011-01-31 | 2015-04-15 | ユニ・チャーム株式会社 | Absorbent structure and absorbent wearing article using the same |
| US9566198B2 (en) * | 2013-03-15 | 2017-02-14 | Dsg Technology Holdings Ltd. | Method of making an absorbent composite and absorbent articles employing the same |
| WO2015002934A2 (en) * | 2013-07-03 | 2015-01-08 | Dsg Technology Holdings Ltd | An absorbent composite, an absorbent article employing the same, and methods, systems, and apparatus for making the absorbent composite and/or article |
| NZ731128A (en) * | 2014-10-03 | 2018-10-26 | Oji Holdings Corp | Absorbent article |
-
2016
- 2016-04-27 JP JP2016089481A patent/JP6380454B2/en active Active
-
2017
- 2017-04-07 CN CN201780025873.XA patent/CN109069326B/en active Active
- 2017-04-07 WO PCT/JP2017/014582 patent/WO2017187945A1/en active Application Filing
- 2017-04-07 TW TW106111719A patent/TWI612949B/en active
- 2017-04-07 RU RU2018141378A patent/RU2708269C1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| RU2708269C1 (en) | 2019-12-05 |
| JP2017196163A (en) | 2017-11-02 |
| CN109069326A (en) | 2018-12-21 |
| JP6380454B2 (en) | 2018-08-29 |
| TWI612949B (en) | 2018-02-01 |
| TW201740898A (en) | 2017-12-01 |
| WO2017187945A1 (en) | 2017-11-02 |
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