JP2018050868A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which can be applied as an inner of a diaper, a sanitary napkin, and a urine leakage pad, which can enhance a wearing feeling to a skin during wearing and has good absorbency.SOLUTION: A pad type absorbent article 1 comprises: a liquid permeable surface sheet 12; a liquid impermeable rear surface sheet 13; and plural absorbers 11 which are sandwiched between the surface sheet 12 and the rear surface sheet 13 and intermittently arranged in a longitudinal direction Y. The plural absorbers 11 are respectively folded and piled in the longitudinal direction Y, and of a folded and piled part 10, both side parts 31 in a width direction X being orthogonal to the longitudinal direction Y are engaged. The folded and piled part 10 is alternately folded in ridge-folding R and folded in valley-folding V, and an engaging part 30 is preferably a tip end or almost tip end of the ridge-folding part R on a skin surface side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pad-type absorbent article, and more specifically, can be applied as an inner of a diaper, a sanitary napkin, a urine leakage pad, etc., and enhances the feeling of wearing on the skin when worn and has good absorbability The present invention relates to a pad type absorbent article.

  Absorbent articles such as general disposable diapers and sanitary napkins include a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. It is comprised including. As such an absorbent article, there is a pad-type disposable diaper in which an absorbent pad for assisting absorption of urine or the like is laid on the surface of a diaper used as an outer so that it is not necessary to replace the entire diaper during excretion. Various types of absorbent pads have been proposed, such as those that expand and contract in parallel with the longitudinal direction of the product, and whose dimensions and absorption sites have been changed according to the body shape and application, and the absorbent body has been cut. In addition, a structure having a structure for separating the absorber has been proposed.

  Patent Document 1 proposes an absorbent article that can change dimensions and absorption sites in accordance with the user's body shape, application, and situation without producing unnecessary parts, and that has a simple structure. In this absorbent article, a main body part formed by arranging a plurality of absorbent parts side by side, a perforation for separating adjacent absorbent parts, and an adjacent absorbent part are interconnected. In addition, the pad-type absorbent article includes a connecting member that can extend in a direction in which adjacent absorbent parts are separated from each other.

  Patent Document 2 proposes an absorbent pad that can absorb excretory fluids well even in a given size and can be separated into smaller sizes as needed. The absorbent pad includes a liquid-permeable first sheet and a second sheet, and two absorbent bodies sandwiched between the two sheets. Between the absorbent body and the absorbent body, the first sheet and The second sheet is drawn to the lower surface side, and the ridge formed thereby is temporarily joined to the lower surface of the other part of the second sheet. This temporary bonding is released as necessary, and the absorbent pad can be cut into a small size for use.

  In patent document 3, the auxiliary | assistant absorption pad which can exhibit the function of an absorber also with respect to highly viscous excrement is proposed. The auxiliary absorbent pad is a long auxiliary absorbent pad placed on the absorbent surface of the absorbent device, and is disposed on one surface side of the surface sheet having liquid permeability and a plurality of water absorbents. A plurality of paper sheets, and a plurality of pieces extending from one side in the width direction perpendicular to the longitudinal direction toward the other side in the width direction. A notch is formed.

JP 2012-175991 A JP 2011-56092 A JP 2012-55382 A

  In the pad-type absorbent article described in Patent Document 1, each adjacent absorbent part can be shredded to an appropriate size by a perforation, but it is necessary to clean up the shredded part and not discard it. However, there is a problem that the size and shape are limited even if they are reused. The absorption pad described in Patent Document 2 can select the size of the absorption pad according to the situation, but since it is fixed at a predetermined size, it may be difficult to select an appropriate size and excretion at the same time. Leakage may occur with respect to the amount of liquid. The auxiliary absorbent pad described in Patent Literature 3 is disposable when used by being stacked on an absorbent device such as a disposable paper diaper by being cut from one side of the width direction perpendicular to the longitudinal direction to the other side. Although it deform | transforms flexibly in the width direction with the curvature of a paper diaper, the expansion to a longitudinal direction is not flexible.

  In general absorbent pads, three-dimensional gathers projecting to the body side extend in the front-rear direction on both sides of the surface of the main body including the absorbent body, but three-dimensional gathers are also formed on the outer paper diaper. If present, the pad and the diaper's three-dimensional gathers are present in a double manner, and the wearing feeling may be deteriorated and leakage may occur. In addition, in order to avoid burdening the body, babies born with low weight may apply gauze instead of diapers or use sanitary napkins, but there are restrictions on the amount and shape of absorption.

  The present invention has been made in consideration of the above-mentioned problems of the prior art, and its purpose is applicable as a diaper inner, sanitary napkin, urine leak pad, etc. It is to provide a pad-type absorbent article having a high absorption and good absorbability.

  The absorbent article according to the present invention includes a plurality of absorbents that are sandwiched between a liquid-permeable top sheet, a liquid-impermeable back sheet, the top sheet and the back sheet, and are intermittently arranged in the longitudinal direction. A pad-type absorbent article having a body, wherein a plurality of the absorbent bodies are folded in the longitudinal direction, and both sides in the width direction orthogonal to the longitudinal direction among the folded parts Is locked.

  According to this invention, since both side portions in the width direction perpendicular to the longitudinal direction are locked among the portions where the plurality of absorbent bodies are folded in the longitudinal direction, the absorbent body is absorbed after absorbing bodily fluids and the like. At the same time as the middle part in the width direction expands in the longitudinal direction, both side parts in the width direction rise. As a result, the absorbability is increased and the structure can be deformed to prevent leakage. Therefore, according to this absorbent article, it is not necessary to provide a double gather as in the prior art, and the wearing feeling during wearing is enhanced.

  In the absorbent article according to the present invention, the folded portions are alternately folded in a mountain and a valley in the longitudinal direction.

  According to the present invention, since the folded portion is alternately folded and folded in the longitudinal direction, folding can be performed by a simple process. In addition, since there are no gathers on both sides in the width direction perpendicular to the longitudinal direction, a flat pad-type absorbent article can be obtained, and deterioration of wearing feeling and occurrence of leakage can be reduced.

  In the absorbent article according to the present invention, the engaged portion is a tip or a substantially tip of the mountain fold on the skin surface side.

  According to this invention, since the locked part is the front-end | tip or substantially front-end | tip of the mountain fold part by the side of a skin, the crease | fold on the skin side can be made flat, and the wearing feeling to skin can be improved. it can. Furthermore, the unevenness of both side portions that rise after absorbing the body fluid can be reduced.

  In the absorbent article according to the present invention, as for the plurality of absorbent bodies, the absorbent body disposed in the central portion is longer in the longitudinal direction than the absorbent body disposed at both ends in the longitudinal direction.

  According to this invention, the central portion is located near the crotch portion when worn, but the absorbent body at the central portion is longer than the absorbent bodies at both ends, so the weight of the absorbent body at the central portion after absorbing bodily fluids It becomes heavier and easier to expand in the longitudinal direction, and at the same time, the wrinkles easily spread.

  In the absorbent article according to the present invention, the folding direction is symmetric toward the central portion in the longitudinal direction.

  According to the present invention, since the folding direction is symmetrical toward the central portion in the longitudinal direction, the wrinkles after absorbing the body fluid are easily spread.

  In the absorbent article according to the present invention, the inner article is a diaper, a sanitary napkin, or an incontinence pad.

  According to the present invention, a pad type absorbent article that can be applied as an inner of a diaper, a sanitary napkin, a urine leakage pad, etc., enhances the feeling of wearing on the skin, and has good absorbability is provided. Can do.

It is explanatory drawing which shows an example of the absorbent article which concerns on this invention. It is a perspective view of the absorbent article shown in FIG. It is II sectional drawing of the width direction of the absorbent article shown in FIG. It is II-II sectional drawing of the longitudinal direction of the absorbent article shown in FIG. It is a perspective view which shows an example of a latching position. It is a perspective view which shows another example of a latching position. It is III-III sectional drawing of the longitudinal direction of the absorbent article shown in FIG. It is sectional drawing of the longitudinal direction which shows an example of the absorbent article which changed the magnitude | size of the absorber. It is sectional drawing of the longitudinal direction which shows an example of the absorbent article which changed the folding direction. It is an example of the form of the absorbent article after an absorber absorbs bodily fluids.

  An embodiment of an absorbent article according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments, but includes various modifications and application examples having essential parts thereof.

[Absorbent articles]
As shown in FIGS. 1 to 4, the absorbent article 1 according to the present invention is sandwiched between a liquid-permeable top sheet 12, a liquid-impermeable back sheet 13, and the top sheet 12 and the back sheet 13. A pad type absorbent article having a plurality of absorbent bodies 11 intermittently arranged in the longitudinal direction Y. In this absorbent article 1, a plurality of absorbent bodies 11 are folded in the longitudinal direction Y, and both side portions 31 in the width direction X perpendicular to the longitudinal direction Y of the folded portions 10 are locked. Has been.

  The absorbent article 1 has both side portions 31 and 31 in the width direction X orthogonal to the longitudinal direction Y of the portions where the plurality of horizontally long absorbent bodies 11 are folded in the longitudinal direction Y. Therefore, after absorbing bodily fluid or the like, the absorbent body 11 expands and the intermediate portion 32 in the width direction X expands in the longitudinal direction Y, and at the same time, both side portions 31 in the width direction W rise. As a result, the absorbability is increased and the structure can be deformed to prevent leakage. Therefore, according to this absorbent article 1, there is no need to provide a double gather as in the prior art, and there is an effect that the feeling of wearing at the time of wearing increases. Preferred examples of the absorbent article 1 include diaper inners, sanitary napkins, incontinence pads (urine leakage pads), and the like.

  Hereinafter, constituent elements and structural forms of the absorbent article will be described in detail.

<Components>
As shown in FIGS. 1 to 4, the basic structure of the absorbent article 1 is that a plurality of absorbent bodies 11 are sandwiched between a top sheet 12 and a back sheet 13, and the plurality of absorbent bodies. 11 is intermittently arranged in the longitudinal direction Y, and between the plurality of absorbers 11 (the overlapping portion of the top sheet 12 and the back sheet 13) is folded in the longitudinal direction Y, and In the folded portion 10, both side portions 31 in the width direction X perpendicular to the longitudinal direction Y are locked. There are no particular restrictions on the absorbent article 1 other than these basic configuration forms, and various modifications may be made as will be described later.

(Absorber)
The absorber 11 has an absorption capability of absorbing excrement excreted by the user, body fluid, and the like, and a plurality of absorbers 11 are used. As shown in FIGS. 1 and 2, the plurality of absorbent bodies 11 are sandwiched between the top sheet 12 and the back sheet 13 from the front and back sides in a form in which a plurality of absorbers 11 are arranged at regular intervals in the longitudinal direction Y. As will be described later, the top sheet 12 is a liquid-permeable sheet that covers the absorber 11 from the front side, and the back sheet 13 is a liquid-impermeable sheet that covers the absorber 11 from the back side. The “front surface” is a surface that becomes the skin surface side 2 at the time of wearing, and the “back surface” is a surface that becomes the non-skin surface side 3 at the time of wearing.

  The structure of the absorbent body 11 is not particularly limited as long as the absorbent body 11 has the above-described absorption performance. Usually, any absorbent body according to the product use of the absorbent article 1 can be used, for example, an aggregate of fibers. Preferred examples include those composed of the above and superabsorbent polymers. These materials may each be comprised independently, and multiple may be comprised by mixing. As this fiber aggregate, nonwoven fabrics such as air laid nonwoven fabric, aggregates of short fibers such as cotton pulp and synthetic fibers, synthetic fiber tows (fiber bundles) such as cellulose acetate are opened as necessary. The filament aggregate obtained by the above can be mentioned.

  As the superabsorbent polymer, those used in this type of absorbent article can be used as they are. The particle size of the superabsorbent polymer particles is not particularly limited, but for example, screening using a standard sieve (JIS Z8801-1: 2006) of 500 μm (shaking for 5 minutes), and particles falling under the screen by this screening When sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1: 2006), the proportion of particles remaining on the 500 μm standard sieve is 30% by mass or less, and the 180 μm standard sieve is used. It is desirable that the proportion of particles remaining above is 60 mass% or more.

  The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. Examples of superabsorbent polymer particles include starch-based, cellulose-based and synthetic polymer-based particles, such as starch-acrylic acid (salt) graft copolymer, starch-acrylonitrile copolymer saponified product, and sodium carboxymethylcellulose crosslinking. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used. When using the superabsorbent polymer particles, if necessary, the dispersion density or the dispersion amount may be adjusted in the planar direction of the absorbent body 11 and included in the absorbent body 11.

  As the superabsorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption speed is too slow, the liquid supplied into the absorbent body 11 is likely to generate a so-called reversal that returns to the outside of the absorbent body 10.

  Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even if it is the case where it is set as the bulky absorber 11, the stickiness after absorbing a liquid can be suppressed effectively.

  The shape of the absorber 11 is a rectangle or a substantially rectangular shape (also referred to as a strip shape). The rectangular or substantially rectangular absorbent bodies 11 are advantageous for alignment in the longitudinal direction and also for alignment at regular intervals. The dimension of the absorbent body 11 can be set to an arbitrary dimension according to the type and size of the absorbent article 1 such as an inner of a diaper, a sanitary napkin, and a urine leak pad.

(Surface sheet)
As shown in FIGS. 3A and 3B, the top sheet 12 is disposed on the skin surface side 2 (also referred to as the front surface side) of the absorbent body 11, and together with the back sheet 13 on the non-skin surface side 3, the absorbent body. 11 is an indispensable sheet for wrapping 11 from the front and back. The top sheet 12 may be a liquid-permeable sheet having a property of permeating bodily fluids. For example, a porous or non-porous nonwoven fabric, a porous plastic sheet, or the like is used. Acts to easily reach the absorber 11 through the light. The nonwoven fabric may be manufactured by any processing.

  The material of the surface sheet 12 is not particularly limited, and synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, or two or more of these Examples thereof include mixed fibers and composite fibers made of. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is for obtaining bulkiness and softness. The top sheet 12 may be a single sheet or a laminated sheet obtained by bonding two or more sheets. Also in the planar direction, the top sheet 33 may be composed of one sheet or may be composed of two or more sheets. Moreover, when the absorbent body 11 contains superabsorbent polymer particles, a sheet from which the superabsorbent polymer particles do not escape is desirable.

(Back sheet)
As shown in FIGS. 3A and 3B, the back sheet 13 is arranged on the non-skin surface side (also referred to as the back surface side) of the absorbent body 11, and together with the top sheet 12 on the skin surface side 2, the absorbent body 11. It is an indispensable sheet that wraps between the front and back. The back sheet 13 is a liquid-impermeable sheet having a property of not transmitting body fluid or the like.

  The material of the back sheet 13 is not particularly limited. For example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric in which a plastic film such as a polyethylene sheet is provided on the surface of the nonwoven fabric, or a waterproof film is interposed. And a non-woven fabric that is substantially liquid-impermeable (in this case, a waterproof film and a non-woven fabric constitute a liquid-impermeable sheet). In addition to this, it is preferable to use a liquid-impermeable and moisture-permeable material for the liquid-impermeable back sheet 13 from the viewpoint of preventing stuffiness. The liquid-impermeable and moisture-permeable material sheet is obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching in a uniaxial or biaxial direction. Microporous sheets are widely used. In addition to this, a nonwoven fabric using microdenier fibers, a leakproof reinforcing sheet in which the voids of the fibers are reduced by applying heat or pressure, a method of applying a superabsorbent resin or a hydrophobic resin or a water repellent Alternatively, a sheet made liquid-impermeable without using a waterproof film may be used as the liquid-impermeable back sheet 13.

  The back sheet 13 may be colored as necessary, or may be printed with a design pattern, for reasons such as making it easy to understand that it is the back surface. Moreover, the bonding tape and the adhesive may be provided as needed for the reason of mounting on the outer.

(Packaging sheet)
The packaging sheet 13 is a sheet for wrapping the absorbent body 11 and is arbitrarily provided according to the product application of the absorbent article 1 as shown in FIG. When the packaging sheet 13 is used, as the material, tissue paper, crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet having small holes, or the like can be used. In the case where the absorbent 11 contains superabsorbent polymer particles, a sheet from which the superabsorbent polymer particles do not escape is desirable. Crepe paper is particularly preferably used, but when using a non-woven fabric instead of crepe paper, a hydrophilic SMS non-woven fabric (SMS, SSMMS, etc.) is particularly preferred, and the material is polypropylene, polyethylene / polypropylene composite, etc. Can do. The basis weight of the packaging sheet 13 is not particularly limited, but is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  The packaging form of the packaging sheet 13 is not particularly limited, and can be arbitrarily determined according to the product application of the absorbent article 1. For example, as shown to FIG. 3 (B), the form which wraps the whole absorber 11 may be sufficient. Moreover, the form which covers only the back surface (surface of the back surface sheet 13 side. The following is the same) and side surface of the absorber 11 may be sufficient. Moreover, only the upper surface (surface on the surface sheet 12 side) and the side surface of the absorbent body 11 are covered with crepe paper or a nonwoven fabric which is the packaging sheet 13, and the back surface (surface on the back sheet 13 side; the same applies hereinafter) is made of polyethylene or the like. The form covered with the back surface sheet 12 may be sufficient. Moreover, the form which covers only the upper surface of the absorber 11 with the crepe paper which is the packaging sheet 13, or a nonwoven fabric, and covers the side surface and the back surface with the back surface sheets 12, such as polyethylene, may be sufficient. Furthermore, forms other than these may be used.

  When the polymer 11 is contained in the absorbent body 11, the packaging sheet 13 is surrounded by the front and back surfaces and both side faces of the absorbent body 11 from the viewpoint of preventing the movement of the particles and preventing the particles from falling off the front and rear edges. A packaging form is preferred in which it is wound in a cylindrical shape and its front and rear edges protrude from the front and rear of the absorber 11, and the protruding portion is crushed in the front and back direction and joined by a joining means such as a hot melt adhesive.

  In addition to the packaging sheet 13, a sheet that can be arbitrarily provided as necessary includes, for example, a sheet that quickly transfers body fluid that has passed through the top sheet 12 to the absorbent body 11. This sheet preferably has a liquid permeation rate faster than that of the top sheet 12, prevents a “reverse phenomenon” from the absorbent body 11 such as absorbed body fluid, and always keeps the top sheet 13 in a dry state. be able to. Examples of the sheet include the same material as the top sheet 12, spunlace, spunbond, SMS, pulp nonwoven fabric, a mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, an air-through nonwoven fabric is preferable because it is bulky. This sheet may be arranged in the center with a width shorter than the width of the absorber 11, or may be provided over the entire width. Further, the length of the sheet in the longitudinal direction may be the same as the length of the absorbent body 11 or may be a short length centered on a region that receives body fluid or the like.

<Structural form>
(Folded structure)
As shown in FIGS. 1 to 4, the absorbent article 1 is provided with a plurality of absorbent bodies 11 sandwiched between a top sheet 12 and a back sheet 13, and the plurality of absorbent bodies 11 are elongated. They are arranged intermittently in the direction Y. And between the some absorbers is each folded in the longitudinal direction Y, and the both sides 31 of the width direction W orthogonal to the longitudinal direction Y among the folded-up parts 10 are latched. When the folded portion 10 absorbs body fluid or the like, as shown in FIG. 10, the absorbent body 11 swells and the intermediate portion 32 in the width direction W expands in the longitudinal direction Y, and at the same time, both side portions 31 in the width direction W. Functions to stand up. At this time, the front ends 34 of the both side portions 31 are directed upward, and the same effect as that of gathers is achieved.

  The folded portion 10 is alternately folded in the longitudinal direction Y in a mountain fold R and a valley fold V. In this folded portion 10, all or most of the area of the absorbent body 11 appears on the top sheet 12 side on the mountain fold R side, and it is folded without being covered with a fold. As a result, the absorber 11 easily absorbs body fluids and the like. On the other hand, a part of the absorbent body 11 is folded on the back surface sheet 13 side on the valley fold V side in a manner covered with the folds of the valley portion. As an example of the length covered with the crease in the valley, it is about 4 mm to 8 mm, for example.

  Such a folded portion 10 can be folded in a simple process, which is advantageous for reducing the manufacturing cost. Moreover, since there are no gathers on both side portions 31 in the width direction X perpendicular to the longitudinal direction Y, a flat pad-type absorbent article can be obtained, and deterioration of wearing feeling and occurrence of leakage can be reduced. Can do. In addition, the presence of the folded portion 10 is necessary for the formation of the locking portion 30 described below. By making the folded portion 10 exist on the back side of the absorbent body 11, the absorption of the absorbent body 11 is achieved. The performance can be sufficiently exerted and can be locked at both side portions 31 in the width direction X. As a result, the absorbent body 11 expands and the intermediate portion 32 in the width direction W expands in the longitudinal direction Y. The both side portions 31 in the width direction W rise.

(Locking)
As shown in FIGS. 1 and 7 (III-III cross-sectional view), the absorbent article 1 has both side portions 31 in the width direction W perpendicular to the longitudinal direction Y in the folded portion 10 locked. . The locking means is related to the material of the top sheet 12 and the back sheet 13, and examples thereof include ultrasonic bonding and heat fusion (heat sealing).

  The absorbent body 11 after absorbing body fluid or the like tends to swell downward due to expansion and its own weight. At this time, since the absorbent article 1 has the folded portion 10, the intermediate portion C in the width direction X of the absorbent article 1 swells downward while spreading in the longitudinal direction Y. On the other hand, since both side portions 31 in the width direction X of the absorbent article 1 are locked and the folded portion 10 is restrained, there is no dimensional change at both side portions 31 as shown in FIG. The tip 34 of 31 rises like a bowl facing upward. As a result, both side portions 31 in the width direction X of the absorbent article 1 are deformed into a standing structure that can prevent leakage, as shown in FIG. Therefore, the absorbent article 1 having such a structure does not need to be provided with a three-dimensional gather, and the wearing feeling at the time of wearing increases.

  As shown in FIGS. 5 to 7, the locking portion 30 is preferably the apex tip 33 or the substantially tip of the mountain fold portion R on the skin surface side in the folded portion 10. By carrying out like this, the crease | fold of the mountain fold part R of the skin surface side 2 becomes flat without jumping out, and can improve the mounting | wearing feeling to skin.

  As shown in FIG. 5, the position of the locking portion 30 in the width direction X is preferably a position away from the end portion 35 of the absorber 11 in the width direction X by a distance d. By providing the locking portion 30 at a position away from the end portion 35, the absorbent article 1 swells downward while spreading in the longitudinal direction Y, and both side portions 31 can rise like a bowl. The distance d at this time is preferably 3 mm or more, for example.

  More preferably, as shown in FIG. 6, the position of the locking portion 30 is preferably provided at the tip (both end portions) 34 of the both side portions 31 in the width direction X of the absorbent article 1. By providing the locking portion 30 at the tip 34, the side portions 31 can easily rise in a bowl shape. In particular, at the top end 33 of the mountain fold R, it is preferable that the engaging portion 30g is provided at the end (both ends) 34 of the side portions 31.

  FIG. 8 is a longitudinal sectional view showing an example of the absorbent article 1 in which the size of the absorbent body 11 is changed. In the folded portion 10, the absorbent body 11 disposed in the central portion 36 in the longitudinal direction Y of the absorbent article 1 rather than the absorbent body 11 ′ disposed at both ends in the longitudinal direction Y of the absorbent article 1. Can be configured to be longer in the longitudinal direction Y. In such a structure, the central portion 36 is located near the crotch portion when worn, but the absorbent body 11 of the central portion 36 is longer than the absorbent bodies 11 'at both ends, so that the central portion 36 after absorbing bodily fluids. The absorbent body 11 becomes heavier and lowers by its own weight and easily expands in the longitudinal direction, and at the same time, wrinkles easily spread. In FIG. 8, the symbol L <b> 1 is the length of the absorbent body 11 disposed in the central portion 36 in the longitudinal direction Y of the absorbent article 1, and the symbol L <b> 3 is disposed at both ends in the longitudinal direction Y of the absorbent article 1. It is the length of the absorber 11 ′, and the symbol L2 is the length of the absorber 11 positioned between them.

  FIG. 9 is a longitudinal sectional view showing an example of the absorbent article 1 in which the folding direction is changed. In the folded portion 10, the folding direction of the folded portion 10 formed by the mountain fold R and the valley fold V is configured to be symmetric toward the central portion 36 in the longitudinal direction Y. Also good. In such a structural form, the central portion 36 is located in the vicinity of the crotch portion when mounted, but the folding direction of the folded portion 10 formed by the mountain fold R and the valley fold V is the longitudinal direction Y toward the central portion 36. Since it is symmetrical, it becomes much easier for the absorbent body 11 in the central portion 36 after absorbing the body fluid to be lowered by its own weight and expanded in the longitudinal direction.

(Shape of absorbent articles, etc.)
As shown in FIG. 1 and the like, the absorbent article 1 is configured such that the peripheral edges of the top sheet 12 and the back sheet 13 protrude larger than the peripheral width of the absorbent body 11. The protruding portion is crushed in the front and back direction and joined by a joining means such as a hot melt adhesive.

  The distance between the adjacent absorbent bodies 11 is disposed within a range of, for example, 5 mm to 25 mm including the folded portion 10 that is folded back thereafter, and the disposed absorbent body 11 is sandwiched between the top sheet 12 and the back sheet 13. By setting it within this range, subsequent folding can be performed, and the folded portion 10 of the mountain fold R and the valley fold V can be easily formed. If the distance is less than 5 mm, the folded portion 10 may not be formed. If the distance exceeds 25 mm, the folded portion 10 may be too large and the thickness may be increased. The length D of the folded portion 10 is preferably in the range of 5 mm to 7.5 mm, for example.

  The folded portion 10 is desirably folded perpendicularly to the longitudinal direction Y of the absorbent article 1.

  The size of the absorbent article 1 is not particularly limited because it is arbitrarily designed depending on the product application and the size of S, M, L, and the like. Therefore, the sizes of the absorbent body 11 in the longitudinal direction Y and the width direction X are also designed based on the size of the absorbent article 1.

  In the absorbent article 1 according to the present invention, the absorbent body 11 is sandwiched between the top sheet 12 and the back sheet 13, and the length of the absorbent body 11 in the width direction X perpendicular to the longitudinal direction Y of the absorbent article 1. May be a length obtained by subtracting the length of both side portions 31 where the absorber 11 does not exist (the bonded portion of only the top sheet 12 and the back sheet 13). The length of the both side parts 31 should just be about 10-30 mm in length W per one side, and the location of the length becomes the latching | locking part 30. In addition, the length between the absorbers in the longitudinal direction Y of the absorbent article 1 should just be the length which can be folded after arrange | positioning the absorber 11 to the longitudinal direction Y intermittently, for example, about 5 mm-25 mm. If it is.

  Therefore, as for the size of the top sheet 12 and the back sheet 13, it is only necessary that the above-described length W can be secured at the both side portions 31 and the above-described length between the absorbent bodies can be secured between the plurality of absorbent bodies. The size of the absorber 11 can be set to any size as long as the length can be secured.

(Product use)
The absorbent article 1 according to the present invention can be used for all pad-type absorbent articles that can be preferably applied as an inner of a diaper, a sanitary napkin, a urine leak pad, or the like. These pad-type absorbent articles 1 may optionally include components that are applied to conventional inner, sanitary napkins, urine leak pads, and the like.

<Explanation of terms in the specification>
When the following terms are used in the specification, they have the following meanings unless otherwise specified in the specification.
-"Gel strength" is measured as follows. Add 1.0 g of superabsorbent polymer to 49.0 g of artificial urine and stir with a stirrer. The produced gel was left in a constant temperature and humidity chamber of 60% RH at 40 ° C. for 3 hours, then returned to room temperature, and the gel strength was measured with a card meter (Curdmeter-MAX ME-500, manufactured by I.techno Engineering). To do.
・ "Weight" is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 20 ± 5 ° C., relative humidity 65% or less) to obtain a constant weight. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. A sample with a size of 200 mm × 250 mm (± 2 mm) is cut out from the test piece in a constant weight using a rice-basis plate (200 mm × 250 mm, ± 2 mm). Measure the mass of the sample, multiply it by 20, calculate the weight per square meter, and use it as the basis weight.
・ The water absorption rate is defined as “time to end point” when JIS K7224-1996 “Test method for water absorption rate of superabsorbent resin” is performed using 2 g of superabsorbent polymer and 50 g of physiological saline. .
・ If there is no description about the environmental conditions in the test and measurement, the test and measurement shall be performed in a test room or equipment in a standard state (test location is temperature 20 ± 5 ° C, relative humidity 65% or less). .
-Unless otherwise specified, the dimensions of each part mean dimensions in a deployed state, not a natural length state.

DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Skin surface side 3 Non-skin surface side 10 Folded part 11 Absorber 11 'Absorbent body arrange | positioned at the both ends of a longitudinal direction 12 Top sheet 13 Back sheet 14 Packaging sheet 30 Locking part 31 Width Both sides in the direction 32 Intermediate part in the width direction 33 Tip of the top of the mountain fold part 34 Tip of both sides 35 End of the absorber 36 Central part in the longitudinal direction of the absorbent article R Mountain fold part V Valley fold part X Width direction Y Longitudinal direction W Length of one side part in the width direction of the bonded portion of only the front sheet and the back sheet L Length of the absorbent body in the longitudinal direction of the absorbent article d From the end of the absorbent body in the width direction to the locking part Distance D Folded length

Claims (6)

Pad-type absorptivity having a liquid-permeable top sheet, a liquid-impermeable back sheet, and a plurality of absorbent bodies sandwiched between the top sheet and the back sheet and arranged intermittently in the longitudinal direction Goods,
The absorbent article is characterized in that the plurality of absorbent bodies are folded in the longitudinal direction, and both side portions in the width direction perpendicular to the longitudinal direction of the folded portions are locked. .   The absorbent article according to claim 1, wherein the folded portion is alternately folded in a mountain and a valley in the longitudinal direction.   The absorptive article according to claim 1 or 2 in which said locked part is a tip of said mountain surface side mountain fold part, or a tip.   The absorption according to any one of claims 1 to 3, wherein the plurality of absorbers are longer in the longitudinal direction in the absorber disposed in the center than in the absorber disposed at both ends in the longitudinal direction. Sex goods.   The absorptive article according to any one of claims 1 to 4 whose direction of said fold is symmetrical toward the central part of a longitudinal direction. The absorbent article according to any one of claims 1 to 5, which is an inner of a diaper, a sanitary napkin, or an incontinence pad.

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