JP2011030700A - Absorptive article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To favorably form side embossed parts without forming bending or wrinkles in a fluid permeable surface sheet. <P>SOLUTION: The absorptive article includes an absorptive element 6 set between the fluid permeable surface sheet 3 and a back sheet 2, side nonwoven fabric 7 arranged on both sides on the surface side, a plurality of embossed parts 8 formed on the fluid permeable surface sheet 3, and side embossed parts 10 formed along the length of laminated parts of the fluid permeable surface sheet 3 with the side nonwoven fabric 7. One length direction end side of the sanitary napkin 1 is set as a line downstream end to be downstream in the line flow direction in manufacturing, and the other length direction end side is set as a line upstream end to be upstream in the line flow direction in manufacturing. The side embossed parts 10 are formed of embossed recesses 11 to incline outward in the width direction from the width direction center side of the sanitary napkin 1 from the line downstream end toward the line upstream end viewed from above. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention can satisfactorily form side embossing even when embossed on absorbent articles such as sanitary napkins, panty liners, and incontinence pads for absorbing menstrual blood or vaginal discharge. The present invention relates to an absorbent article.

  Conventionally, as an absorbent article such as a panty liner, sanitary napkin, incontinence pad, a liquid-impervious back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric, and a liquid-permeable surface such as a nonwoven fabric or a liquid-permeable plastic sheet. 2. Description of the Related Art An absorbent element including an absorbent body made of cotton pulp or the like is interposed between a sheet and a sheet.

  Numerous improvements have been made to this type of absorbent article, and it is known that the surface material is embossed or perforated to provide unevenness for the purpose of reducing the contact area with the skin and preventing fogging. (For example, Patent Documents 1 and 2 below).

  As in the absorbent articles described in Patent Literatures 1 and 2 below, an absorbent element is interposed between the liquid-impervious back sheet and the liquid-permeable front sheet, and along the longitudinal direction on both sides of the front side. An absorbent article in which a side nonwoven fabric is disposed, and in order to reduce contact area with skin and prevent fogging, a plurality of embosses are formed on the liquid permeable surface sheet, and the side nonwoven fabric and the liquid permeable surface. The manufacturing process of the absorbent article in which the side embossing is formed in the laminated portion of the sheet is performed by a so-called longitudinal flow method in which the line flow direction is the longitudinal direction of the absorbent article. Specifically, as shown in FIG. It was done in the procedure.

  First, the liquid-permeable surface sheet 3 fed from the liquid-permeable surface sheet material raw fabric 20 is fed out to the line, and the liquid-permeable surface sheet 3 is heated to a predetermined temperature, and an anvil that receives the pressure. By passing between the rolls 22, embosses are formed at predetermined intervals in the central portion in the width direction by squeezing by the embossing protrusions formed on the surface of the embossing roll 21 (see FIG. 4).

  Next, the side nonwoven fabric 7 sent out from the side nonwoven fabric material raw material 24 is arrange | positioned at the both sides of this surface sheet 3 embossed. By passing between the embossing roll 26 for side embossing and the anvil roll 25 in these laminated states, side embossing is formed in the laminated portion of the liquid-permeable surface sheet 3 and the side nonwoven fabric 7.

  Thereafter, the liquid-permeable surface sheet 3 and the side nonwoven fabric 7 subjected to the above-described side embossing on the surface side of the liquid-impermeable back sheet 2 and the absorbent element 6 sent out from the liquid-impermeable back sheet material raw fabric 23 are provided. At the same time, the absorbent article is completed by cutting into a predetermined shape.

JP 2004-49697 A Japanese Patent No. 3860554

  However, the following problems have occurred in the manufacturing process described above.

  For example, as shown in FIG. 4, when a plurality of embossed groups are formed at predetermined intervals in the line flow direction at the center in the width direction of the liquid-permeable surface sheet 3 fed from the liquid-permeable surface sheet material 20 Between each embossed group (intermittent section where no embossing is formed), the liquid-permeable topsheet is likely to shrink in the width direction due to the tension in the line flow direction. On the other hand, in the emboss formation section where the plurality of embosses are formed, the liquid permeable surface sheet is permeable in the width direction between the portion where the emboss is formed in the central portion in the width direction and the portion where the embosses on both sides are not formed. Due to the difference in the rigidity of the topsheet, curling is likely to occur on both sides where no embossing is formed (see FIG. 5).

  In this way, after the side nonwoven fabric is arranged on both sides of the liquid-permeable surface sheet in which width or curl has occurred, an attempt is made to form side embossing on the laminated portion of the liquid-permeable surface sheet and the side nonwoven fabric. As shown in Fig. 2, embossing defects are likely to occur, such as bending both sides of the liquid-permeable surface sheet to double or wrinkles.

  Then, the main subject of this invention is providing the absorbent article which made it possible to form a side emboss favorably, without producing a bending and a wrinkle in a liquid-permeable surface sheet.

In order to solve the above-mentioned problems, as the present invention according to claim 1, an absorbent element is interposed between the liquid-permeable top sheet and the back sheet, and side nonwoven fabrics are disposed on both sides of the surface side, In the absorbent article in which a plurality of embosses are formed on the liquid-permeable surface sheet, and side embosses are formed along the longitudinal direction in the laminated portion of the liquid-permeable surface sheet and the side nonwoven fabric,
The absorbent article has one end side in the longitudinal direction as a downstream end portion of the line that is downstream in the line flow direction during production, and the other end side in the longitudinal direction is the upstream side in the line flow direction during production. The end,
The said side embossing is formed by the concave embossing of the direction which inclines in the width direction outer side from the width direction center side of an absorbent article toward the said line upstream side edge part from the said line downstream edge part in planar view. An absorbent article is provided.

  According to the first aspect of the present invention, the one end side in the longitudinal direction of the absorbent article is the downstream end of the line that is the downstream side in the line flow direction during production, and the other end side in the longitudinal direction is the upstream in the line flow direction during production. This is applied when an absorbent article is manufactured by a so-called longitudinal flow method in which a line upstream side end serving as a side is used. In the absorbent article manufactured by such a longitudinal flow method, for example, as shown in FIG. 4, an embossing section in the line flow direction is applied to the liquid permeable surface sheet fed from the raw material of the liquid permeable surface sheet material. And the intermittent section are alternately formed, the width is reduced in the width direction due to the tension in the line flow direction in the intermittent section, and both sides of the embossed section are caused by the rigidity difference in the width direction of the liquid-permeable surface sheet. Even when the curl is rounded, the side embossing is formed by concave embossing in a direction inclined from the width direction center side of the absorbent article to the width direction outer side from the line downstream end to the upstream end. Therefore, the pressure applied to the side nonwoven fabric and the liquid-permeable surface sheet to the outside in the width direction is increased with the line flow when the side embossing is pressurized. To become to be given, and wrinkles in the width-containing moiety, it is possible to prevent the bending of Carl portion, side embossed will be able satisfactorily formed.

  As the present invention according to claim 2, the side embossing is a linear concave embossing inclined from the center in the width direction of the absorbent article to the outer side in the width direction from the line downstream end to the line upstream end. The absorbent article according to claim 1, which is formed by intermittent arrangement.

  The invention according to claim 2 defines a specific form of the side embossing, from the downstream end of the line toward the upstream end of the line, from the center in the width direction of the absorbent article in the width direction. The side embossing is formed by intermittently arranging linear concave embosses inclined outward. Thereby, the pressure which extends a side nonwoven fabric and a liquid-permeable surface sheet to the width direction outer side with a line flow at the time of formation of the above-mentioned side embossing will come to be provided intermittently.

  As the present invention according to claim 3, the side embossing has an embossed groove formed along a substantially longitudinal direction of the absorbent article, and a high-pressure squeezed portion and a low-pressure squeezed serving as the concave embossed surface on the bottom surface of the embossed groove. Are arranged alternately, and at least the orientation direction of the high-pressure portion is formed so as to be inclined from the center side in the width direction of the absorbent article to the outer side in the width direction from the line downstream end to the line upstream end. An absorbent article according to claim 1 is provided.

  The invention described in claim 3 defines a specific other form of the side embossing, and forms an embossed groove along the substantially longitudinal direction of the absorbent article, and the bottom surface of the embossed groove The center of the absorbent article in the width direction is arranged by alternately arranging the high pressing parts and the low pressing parts that become concave embossing, and at least the orientation direction of the high pressing parts from the downstream end of the line toward the upstream end of the line. The side embossing is inclined from the side to the outside in the width direction. In this way, the embossed groove is formed, and the high pressure portion and the low pressure portion are alternately arranged along the longitudinal direction of the groove on the bottom surface of the embossed groove, thereby increasing or decreasing the pressure applied by the side embossing described above. Thus, the side embossing failure due to bending or wrinkles can be more effectively prevented.

  As this invention which concerns on Claim 4, each high pressure part of each concave embossing of the side embossing in the said Claims 1 and 2 or the concave embossing of the said Claim 3 is the width direction center of an absorbent article. An absorbent article having a relatively large width dimension on the side and a relatively small width dimension on the outer side in the width direction is provided.

  In the invention according to claim 4, the concave embossing of the side embossing according to any one of claims 1 and 2 or the high pressing portion of the recessed embossing according to claim 3 is the center in the width direction of the absorbent article. By forming the width dimension on the side to be relatively large and forming the width dimension on the outside in the width direction to be relatively small, the pressing force during emboss formation is maximized on the center side in the width direction, and then As the line flows, it can be applied so as to be gradually reduced outward in the width direction, and bending and wrinkles can be reliably extended outward.

  As the present invention according to claim 5, each concave emboss of the side emboss is formed such that the depth of the absorbent article on the center side in the width direction is relatively deep and the depth on the width direction outside is relatively shallow. An absorbent article according to any one of claims 1 to 4 is provided.

  In the invention according to claim 5, the concave embosses of the side embosses are set so that the depth of the absorbent article on the center side in the width direction is relatively deep and the depth on the width direction outside is relatively shallow. It is possible to maximize the pressure during emboss formation at the center in the width direction, and then gradually apply it to the outside in the width direction along with the line flow. To be able to stretch.

  As the present invention according to claim 6, there is provided the absorbent article according to any one of claims 1 to 5, wherein the side embossing is formed in substantially the same pattern over the entire length.

  The invention according to claim 6 is an absorptivity in which side embossing is formed in the same pattern over substantially the entire length, and a plurality of embossments are formed over substantially the entire length in the longitudinal direction of the liquid-permeable surface sheet. It is suitably applied to an article.

As the present invention according to claim 7, the emboss is formed in the middle region in the longitudinal direction in the liquid-permeable surface sheet,
The absorbent article according to any one of claims 1 to 5, wherein the side embossing is provided with different inclination angles of the concave embossment in the embossing section and in both longitudinal end sections thereof.

  As the present invention according to claim 8, in the emboss formation section, an angle formed by the orientation direction of the concave emboss and the longitudinal line of the absorbent article is formed to be relatively larger than both end sections in the longitudinal direction. An absorbent article according to claim 7 is provided.

  According to the seventh and eighth aspects of the present invention, by forming a plurality of embossments in the intermediate region in the longitudinal direction of the liquid-permeable surface sheet, an emboss formation section in the longitudinal intermediate region and both end sections in the longitudinal direction are formed. It is suitably applied to absorbent articles. At this time, in the emboss formation section and the both ends in the longitudinal direction, both side portions of the liquid-permeable surface sheet have different problems such as curling or entering width. It is preferable to set the inclination angle of the concave emboss so as to correspond to each of the end sections in the direction. Specifically, since curling becomes a problem in the embossing section, the angle formed by the orientation direction of the concave embossing and the longitudinal line of the absorbent article is formed to be relatively larger than both end sections in the longitudinal direction. It is preferable. Thereby, the roundness of both ends can be extended at a loose embossing angle in the emboss formation section, and the outer end section in the longitudinal direction can be strongly stretched outward.

  As described above in detail, according to the present invention, it is possible to provide an absorbent article in which side embossing can be satisfactorily formed without causing bending or wrinkles in the liquid-permeable surface sheet.

It is a partial fracture development view of sanitary napkin 1 concerning the present invention. It is the II-II arrow directional view. It is an assembly line figure of this sanitary napkin. It is a formation line figure of embossing 8. FIG. 5 is a view taken along line VV in FIG. 4. It is sectional drawing of the conventional sanitary napkin. It is an enlarged view of the side embossing 10 (the 1). It is an enlarged view of the side embossing 10 (the 2). 3 is an enlarged perspective view of an embossed groove 12. FIG. It is an enlarged view of the side embossing 10 (the 3). It is an enlarged view of the side embossing 10 (the 4). FIG. 3 is a cross-sectional view in the orientation direction of a concave emboss 11. It is an expanded view of the sanitary napkin 1 (the 1) which concerns on another example of a form. It is an expanded view of the sanitary napkin 1 (the 2) which concerns on another example of a form. It is an expanded view of the sanitary napkin 1 (the 3) which concerns on another form example. It is an expanded view of the sanitary napkin 1 (the 4) which concerns on another form example. It is an enlarged view of the side embossing 10 (the 5).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, the sanitary napkin 1 according to the present invention has a liquid-impervious back sheet 2 made of a polyethylene sheet and the like, and a liquid-permeable surface that allows permeation of blood or vaginal discharge quickly. An absorbent element 6 comprising a sheet 3 and an absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between both sheets 2 and 3, and preferably an encapsulating sheet 5 surrounding the absorbent body 4, and The surface is mainly composed of side nonwoven fabrics 7 and 7 which are formed along the longitudinal direction on both sides of the flange.

  A plurality of embosses 8, 8... Are formed on the liquid-permeable surface sheet 3 at least partially or entirely including the body fluid discharge part region H. The embosses 8, 8... Are for eliminating the sticky feeling by reducing the contact area with the skin and for quickly absorbing body fluids. At this time, when a hydrophilic fiber sheet (not shown) is interposed between the liquid-permeable surface sheet 3 and the absorbent element 6, the liquid-permeable surface sheet 3 and the hydrophilic fiber sheet are You may make it join discontinuously by the said embossing 8,8 ....

  In the illustrated example, an emboss groove 9 is formed that is closed in the circumferential direction so as to surround the embosses 8, 8... And extends from the liquid-permeable surface sheet 3 to the absorber 4. The embossed groove 9 is used to form a middle and high portion of the high absorption element on the use surface side in the center portion in the width direction and to block the surface flow of the body fluid discharged to the body fluid discharge portion region H. This embossed groove 9 is arbitrarily formed.

  Further, side embosses 10 are formed along the longitudinal direction of the sanitary napkin 1 in the laminated portion of the liquid-permeable surface sheet 3 and the side nonwoven fabric 7.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impermeable back sheet 2, a sheet material having at least water shielding properties such as an olefin resin sheet such as polyethylene or polypropylene is used. In addition, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or A nonwoven fabric sheet (in this case, the waterproof film and the nonwoven fabric constitute a liquid-impervious back sheet) can be used after substantially impervious to liquid imperviousness by interposing a waterproof film. In recent years, from the viewpoint of preventing stuffiness, those having moisture permeability tend to be used. This water-impervious and moisture-permeable sheet material is a microporous sheet obtained by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. It is.

  Next, as the liquid-permeable surface sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Examples of the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft.

  The absorbent body 4 constituting the absorbent element 6 interposed between the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 is composed of, for example, fluffy pulp and a water-absorbing polymer. The water-absorbing polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price.

  Further, synthetic fibers may be mixed in the absorbent body 4. As the synthetic fiber, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. It may be a mixture. In addition, a composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can also be used. In the case of a hydrophobic fiber, it is desirable to use a synthetic fiber that has been surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.

  When providing the encapsulating sheet 5 surrounding the absorbent body 4 as in this example, as a result, the encapsulating sheet 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4, A body fluid is quickly diffused by the encapsulating sheet 5 having excellent absorbability, and reversal of menstrual blood and the like is prevented. As the encapsulating sheet 5, crepe paper or hydrophilic nonwoven fabric can be used.

  On the other hand, side non-woven fabrics 7 and 7 are provided on both sides of the sanitary napkin 1 along the longitudinal direction and almost the entire length of the napkin 1, respectively. Wing-like flaps W, W are formed by a part of the liquid-impervious back sheet 2 that extends sideways and also extends sideways.

  As the side nonwoven fabric 7, a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of an important function. For example, if importance is placed on functions such as preventing permeation of menstrual blood or vaginal discharge, or enhancing the touch feeling, water repellent treatment coated with silicon, paraffin or alkylchromic chloride water repellent It is desirable to use a nonwoven fabric. Further, if importance is attached to the absorption of menstrual blood and the like in the wing-shaped flaps W, W, a method of polymerizing a compound having a hydrophilic group, for example, an oxidation product of polyethylene glycol, in the process of producing a synthetic fiber, , By treating with a metal salt such as stannic chloride, partially dissolving the surface to make it porous, and depositing metal hydroxides to swell or make the synthetic fiber porous, applying capillary action to make it hydrophilic The hydrophilic treatment nonwoven fabric which gave is used.

  Here, the manufacturing process of the sanitary napkin 1 will be described with reference to FIG. 3. The sanitary napkin 1 is manufactured by a so-called longitudinal flow method in which the line flow direction is the longitudinal direction of the absorbent article. One end side in the longitudinal direction of the napkin 1 is a line downstream end that is downstream in the line flow direction during manufacture, and the other end in the longitudinal direction is an upstream end in the line flow direction during manufacture. Is done. More specifically, the liquid-permeable surface sheet 3 delivered from the surface material raw material 20 is guided to the anvil roll 22 and passed between the embossing roll 21 and formed on the surface of the embossing roll 21. The embossed 8, 8... Group is formed at predetermined intervals in the central portion in the width direction by squeezing by the embossing protrusions (see FIG. 4). Next, the side nonwoven fabric 7 sent out from the side nonwoven fabric material raw material 24 is piled up on both sides of the surface side of the liquid-permeable surface sheet 3. Then, the side embossing 10 is formed in the lamination | stacking part of the liquid-permeable surface sheet 3 and the side nonwoven fabric 7 by guiding these laminated bodies to the anvil roll 25 and passing between the embossing rolls 26 for side embossing. . Thereafter, the laminated body of the liquid-permeable surface sheet 3 and the side nonwoven fabric 7 was overlaid on the surface side of the absorbent element 6, and an embossed groove 9 extending from the surface side of the liquid-permeable surface sheet 3 to the absorber 4 was formed. Then, the back sheet 2 sent out from the back sheet material raw fabric 23 is bonded to the back surfaces of the absorbent element 6 and the side nonwoven fabric 7 and cut into a predetermined shape to complete the sanitary napkin 1.

  At this time, the liquid-permeable surface sheet 3 after passing between the embossing roll 21 and the anvil roll 22, as shown in FIG. Intermittent sections where no embossing is formed between groups are formed alternately. As a result, in the intermittent section, it is easy to generate a width that shrinks in the width direction due to the tension in the line flow direction. Curling is likely to occur (see the cross-sectional view in FIG. 5).

  When the liquid-permeable surface sheet 3 and the side nonwoven fabric 7 in a state where such widths and curls are generated are overlapped and side embossing is performed, both side portions of the surface sheet 3 are bent as shown in FIG. Embossing defects such as heaviness and wrinkles tend to occur.

  Therefore, in the sanitary napkin 1, the side emboss 10 is formed downstream of the line in a plan view so that the side emboss 10 is formed in a state where the width of both sides of the liquid-permeable surface sheet 3 and the curl are extended. It is formed by concave embosses 11, 11... In a direction inclined from the center side in the width direction of the sanitary napkin 1 toward the outer side in the width direction from the side end portion toward the line upstream side end portion. By forming the side embossing 10 by the concave embossing 11 having such an inclination angle, the embossing load point gradually moves outward along with the line flow when the side embossing is pressurized. A pressing force is applied so as to extend both sides of the outer side in the width direction. For this reason, while being able to prevent the liquid-permeable surface sheet 3 and the side nonwoven fabric 7 in a width | variety part from being wrinkled, bending of the liquid-permeable surface sheet 3 in a curl part can be prevented, and the side embossing 10 can be formed favorably. Will be able to.

  Hereinafter, specific embodiments of the side emboss 10 will be described in detail.

  As shown in FIGS. 1 and 7, the side emboss 10 has a linear shape that inclines from the center side in the width direction of the sanitary napkin 1 toward the outer side in the width direction from the line downstream end to the line upstream end. Can be formed by intermittently arranging a plurality of concave embosses 11. By arranging a plurality of the concave embosses 11 having such an inclination angle intermittently, when the side embossing is pressed by the embossing roll 26, the wrinkles and widths of the liquid-permeable surface sheet 3 are easily released outward in the width direction. Here, the concave emboss 11 is preferably a pattern having no corners because it feels better and is less likely to wrinkle.

  Further, as shown in FIGS. 8 and 9, the side emboss 10 has an embossed groove 12 formed along the substantially longitudinal direction of the sanitary napkin 1, and the bottom surface of the embossed groove 12 along the longitudinal direction of the groove. The high pressing parts 13 and the low pressing parts 14 that become the concave embossing 11 are alternately arranged, and the orientation directions of the high pressing parts 13 and the low pressing parts 14 are changed from the line downstream end to the line upstream end. The sanitary napkin 1 can be formed so as to incline from the center side in the width direction toward the outer side in the width direction. In this way, by forming the embossed grooves 12 in which the high pressing parts 13 and the low pressing parts 14 are alternately arranged, the liquid-permeable surface sheet 3 is continuously increased and weakened in the high pressing parts 13 and the low pressing parts 14. Therefore, it is possible to apply a pressing force extending outward, and to prevent embossing defects more reliably.

  Here, as shown in FIG. 10, the high pressing portion 13 is formed in an arc shape in which an inclined portion is bulged outward, and at least the orientation direction of the high pressing portion 13 is from the downstream end of the line. You may form so that it may incline to the width direction outer side from the width direction center side of the sanitary napkin 1 toward the line upstream side edge part. By forming it in an arc shape, the touch is improved and wrinkles are less likely to occur.

  As shown in FIG. 11, each concave emboss 11 of the side emboss has a relatively large width dimension W1 on the center side in the width direction of the sanitary napkin 1, and a relatively small width dimension W2 on the outer side in the width direction. You may form as follows. Thereby, the applied pressure at the time of emboss formation can be maximized on the center side in the width direction, and can be applied so as to gradually decrease outward in the width direction along with the line flow, and the side nonwoven fabric 7 and the liquid-permeable surface sheet 3 can be applied. The bends and wrinkles can be reliably extended outward. As shown in FIGS. 8 to 10, in the case of the side embossing 10 in which the high pressing parts 13 and the low pressing parts 14 that become the concave embossing 11 are alternately arranged on the bottom surface of the embossing groove 12, at least the concave embossing 11. Of the sanitary napkin 1 is formed so that the width dimension W1 on the center side in the width direction is relatively large and the width dimension W2 on the outer side in the width direction is relatively small.

  Further, as shown in FIG. 12, each concave emboss 11 of the side emboss has a cross section in the orientation direction so that the depth on the center side in the width direction of the sanitary napkin 1 is relatively deep, and the outer side in the width direction. You may form so that the depth of may become relatively shallow. In the illustrated example, the depth on the center side in the width direction is formed deep, and the emboss depth is gradually reduced toward the outside in the width direction. Thereby, the applied pressure at the time of emboss formation can be maximized on the center side in the width direction, and can be applied so as to gradually decrease outward in the width direction along with the line flow, and the side nonwoven fabric 7 and the liquid-permeable surface sheet 3 can be applied. The bends and wrinkles can be reliably extended outward.

  By the way, as shown in FIG. 13 and FIG. 14, when the emboss 8 is formed on almost the entire surface of the liquid-permeable surface sheet 3 (FIG. 13), and substantially the entire length in the longitudinal direction at the center in the width direction of the sanitary napkin 1. In both cases (FIG. 14), both side portions of the liquid-permeable surface sheet 3 are easily curled over almost the entire length, so that the side emboss 10 has the same pattern over the entire length. It is preferable to form by. Even when the emboss 8 is formed on the entire surface, when a hydrophilic second sheet narrower than the liquid-permeable surface sheet 3 is joined, the rigidity of both side portions of the surface sheet 3 becomes relatively small, so Therefore, it is preferable to form the same pattern over almost the entire length.

  On the other hand, as shown in FIGS. 15 and 16, the liquid-permeable topsheet 3 has a substantially square shape (FIG. 15) or a substantially elliptical shape (FIG. 16) in only the middle region in the longitudinal direction. When the emboss is not formed in the front and rear regions, the side emboss 10 can make the inclination angle of the concave emboss 11 different between the emboss formation section and the front and rear sections thereof. Here, the “emboss formation section” is a section in the longitudinal direction of the napkin where at least the embosses 8, 8.

  Specifically, the angle α1 formed by the orientation direction of the concave emboss 11 in the emboss formation section and the longitudinal line of the sanitary napkin 1 is formed to be relatively larger than the angle α2 of the front and rear sections. It is preferable. More specifically, since the embossing section is a portion that is easily curled, a relatively gentle angle with α1 of less than 90 ° is preferable so that the curl is extended, and 45 ° to 75 ° is more preferable. In the front and rear sections, it is easy to enter the width, so a relatively tight angle with α2 of 60 ° or less is preferable and 30 ° to 50 ° is more preferable so that it is strongly stretched outward.

  By the way, the said side embossing 10 can be formed with a various pattern besides the said example of a form. For example, as shown in FIG. 17, the sanitary napkin 1 has an inclined section 11 ′ that is inclined from the width direction center side to the width direction outer side, and the front and rear end portions thereof are inclined from the line downstream side toward the line upstream side. It can form in the continuous line shape which followed the front-and-rear end part of adjacent inclination area 11 '. Here, on the center side in the width direction, in order to increase the pressing area, it is preferable that the adjacent inclined section 11 ′ is continuously formed so as to form an arc as shown in the illustrated example. Thus, by forming the side embossing 10 in a continuous line shape, it is possible to prevent the side leakage of body fluid that travels on the surface.

  DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Back surface sheet, 3 ... Liquid-permeable surface sheet, 4 ... Absorber, 5 ... Encapsulating sheet, 6 ... Absorbing element, 7 ... Side nonwoven fabric, 8 ... Embossing, 9 ... Embossed groove, 10 ... side embossing, 11 ... concave embossing, 12 ... embossing groove, 13 ... high-pressure pressing part, 14 ... low-pressure pressing part

Claims (8)

While an absorbent element is interposed between the liquid-permeable surface sheet and the back sheet, side nonwoven fabrics are disposed on both sides of the surface side, and a plurality of embosses are formed on the liquid-permeable surface sheet. In the absorbent article in which side embossing is formed along the longitudinal direction in the laminated portion of the liquid-permeable surface sheet and the side nonwoven fabric,
The absorbent article has one end side in the longitudinal direction as a downstream end portion of the line that is downstream in the line flow direction during production, and the other end side in the longitudinal direction is the upstream side in the line flow direction during production. The end,
The said side embossing is formed by the concave embossing of the direction which inclines in the width direction outer side from the width direction center side of an absorbent article toward the said line upstream side edge part from the said line downstream edge part in planar view. Absorbent article characterized by.   The side emboss is formed by intermittently arranging linear concave embosses inclined from the center in the width direction of the absorbent article to the outer side in the width direction from the line downstream end to the line upstream end. The absorbent article according to claim 1.   In the side embossing, embossed grooves are formed along the substantially longitudinal direction of the absorbent article, and high pressure parts and low pressure parts that become the concave embossing are alternately arranged on the bottom surface of the embossed grooves, and at least The absorption according to claim 1, wherein an orientation direction of the high pressing portion is formed to be inclined from the width direction center side of the absorbent article to the width direction outer side from the line downstream end portion toward the line upstream end portion. Sex goods.   Each recessed embossing of the side embossing according to any one of claims 1 and 2 or the high-pressure portion of the recessed embossing according to claim 3 has a relatively large width dimension on the center side in the width direction of the absorbent article. An absorbent article in which the width dimension on the outer side in the width direction is relatively small.   Each recessed embossing of the said side embossing is formed in the depth direction center side of an absorbent article relatively deeply, and the depth of the width direction outer side is formed relatively shallowly in any one of Claims 1-4. Absorbent articles.   The said side embossing is an absorbent article in any one of Claims 1-5 formed in the same pattern over substantially full length. In the liquid-permeable surface sheet, the emboss is formed in an intermediate region in the longitudinal direction,
The said side embossing is an absorbent article in any one of Claims 1-5 which makes the inclination angle of the said concave embossing differ in the said emboss formation area and its longitudinal direction both ends area.   The absorbent article according to claim 7, wherein an angle formed by the orientation direction of the concave embossing and a longitudinal line of the absorbent article is formed relatively larger in the embossing section than in the both end sections in the longitudinal direction.

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