JP2022028262A - Absorbent article - Google Patents

Abstract

To provide an absorbent article with wing parts which are to be attached to shorts easily and stably, the absorbent article giving favorable wearing comfort.SOLUTION: An absorbent article comprises wing parts 3, where each wing part 3 includes a skin surface-side first sheet and an outer surface-side second sheet, where the first sheet and the second sheet are mutually joined at an adhesion part 23, and where density of the adhesion part 23 in a front half part 3F of the wing part 3 is higher than density of the adhesion part 23 in a rear half part 3R of the wing part 3. The wing part 3 may be so formed that an adhesive application amount of the adhesion part 23 per unit area at the front half part 3F becomes more than that at the rear half part 3R of the wing part 3. Alternatively, the first sheet and the second sheet of the wing part 3 may be joined by a fusing part 24 and density of the fusing part 24 in the front half part 3F may be higher than that in the rear half 3R of the wing part 3.SELECTED DRAWING: Figure 5

Description

The present invention relates to an absorbent article such as a urine pad (including a light incontinence pad) and a sanitary napkin, and more particularly to an absorbent article that can be attached to underwear such as pants and shorts. be.

Conventionally, an absorbent article having a main body portion in which an absorber is arranged and a wing portion extending outward in the width direction from the main body portion is known (for example, Patent Documents 1 to 3). An absorbent article having such a wing portion is usually used by folding the wing portion toward the outer surface side of the absorbent article and attaching it to underwear such as pants or shorts when the wing portion is attached.

Japanese Unexamined Patent Publication No. 2000-21330 Japanese Unexamined Patent Publication No. 2008-136611 Japanese Unexamined Patent Publication No. 2007-014650

It is desirable that the absorbent article having the wing portion keeps a stable flat state without twisting the wing portion when it is attached to the underwear, which facilitates the attachment work of the wing portion to the underwear. Then, after the wing portion is attached to the underwear, it is preferable that the attached state of the wing portion to the underwear is stably maintained. Further, it is preferable that the wing portion does not make the wearer feel uncomfortable.

The present invention has been made in view of the above circumstances, and an object thereof is an absorbent article having a wing portion, which is easy to attach to the underwear of the wing portion and stably makes the wing portion into underwear. It is an object of the present invention to provide an absorbent article which can be attached and has a good wearing feeling.

The absorbent article of the present invention, which has been able to solve the above-mentioned problems, has a front region, a posterior region, and an intermediate region located between them in the front-rear direction, and has a main body portion in which an absorber is arranged. , An absorbent article having a wing portion extending outward in the width direction from an intermediate region of the main body portion; the wing portion has a first sheet on the skin surface side and a second sheet on the outer surface side. , The 1st sheet and the 2nd sheet are joined to each other at the adhesive part; The wing is divided into a front half of the front part of the wing center and a rear half of the rear part of the wing center; It is characterized in that the density of the bonded portion is higher than the density of the bonded portion in the posterior half of the wing portion. In the adhesive portion of the wing portion, the amount of adhesive applied to the adhesive portion per unit area in the front half portion of the wing portion is larger than the amount of adhesive applied to the adhesive portion per unit area in the rear half portion of the wing portion. It may be formed as follows. Further, the first sheet and the second sheet are joined by a welded portion instead of the bonded portion, and the density of the welded portion in the front half portion of the wing portion becomes higher than the density of the welded portion in the rear half portion of the wing portion. It may be formed as follows.

In the absorbent article of the present invention, the rigidity of the front half portion of the wing portion can be increased and the rigidity of the rear half portion can be decreased by forming the adhesive portion or the welded portion in the wing portion as described above. .. Therefore, when the wing portion is folded back to the outer surface side of the absorbent article and fixed to the underwear, the wing portion is less likely to be twisted due to the high rigidity portion, the work of attaching the wing portion to the underwear becomes easy, and the rigidity is low. Since the portion has improved followability to the movement and distortion of the underwear, the wing portion can be stably attached to the underwear. Further, since the rigidity of the rear half of the wing portion is lowered, the wing portion is less likely to hit the wearer's crotch and buttocks strongly in the seated state, and the wearing feeling of the absorbent article can be improved. ..

It is preferable that the bonded portion or the welded portion extends linearly in the front-rear direction and has a pattern arranged in a plurality of rows in the width direction. By providing the adhesive portion or the welded portion in such a pattern, when the absorbent article is attached to the underwear, the wing portion can be easily folded back toward the outer surface side of the absorbent article. In addition, the rigidity of the entire wing portion does not become too high, and when the absorbent article is attached to the underwear, not only the rear half portion of the wing portion but also the front half portion is hard to hit the wearer's crotch, and the absorbency is absorbed. The feeling of wearing the article is improved.

The bonded portion or the welded portion is provided in a continuous linear shape from the front half portion to the rear half portion, and the average value of the line width in the front half portion may be larger than the average value of the line width in the rear half portion. preferable. By providing the bonded portion or the welded portion in this way, the rigidity of the wing portion does not change abruptly at the boundary between the front half portion and the rear half portion, and the handleability of the wing portion is improved.

The main body has a top sheet arranged on the skin surface side of the absorber, a back sheet arranged on the outer surface side of the absorber, and side sheets arranged on both sides in the width direction of the top sheet, and has a back. It is preferable that the sheet and the side sheet extend outward in the width direction from the intermediate region of the main body portion, the side sheet forms the first sheet, and the back sheet forms the second sheet. When the wing portion is configured in this way, the rigidity near the boundary between the main body portion and the wing portion does not increase, and when the wing portion is folded back to the outer surface side of the absorbent article and fixed to underwear such as pants or shorts. In addition, even if the wearer's skin hits the folded part of the wing part, the wearer does not feel a sense of discomfort. In addition, the side sheets can form leak-proof flaps on both sides of the main body in the width direction on the skin surface side, and can prevent lateral leakage of urine and the like.

The center of the wing portion in the front-rear direction is preferably located on the front side of the center of the main body portion in the front-rear direction. By providing the wing portion in this way, the front half of the wing portion is less likely to hit the crotch portion and buttocks of the wearer in the seated state, and the wearing feeling of the absorbent article is improved.

In the absorbent article of the present invention, the wing portion can be easily attached to the underwear, the wing portion can be stably attached to the underwear, and the wing portion can be attached to the wearer's crotch or the wearer's crotch while sitting. Since it is hard to hit the buttocks strongly, the wearing feeling is good.

An example of the absorbent article of the present invention is represented, and a plan view of the absorbent article as viewed from the skin surface side is shown. A plan view of the absorbent article shown in FIG. 1 as viewed from the outer surface side is shown. FIG. 3 shows a cross-sectional view taken along the line III-III of the absorbent article shown in FIGS. 1 and 2. The enlarged plan view of the wing part of the absorbent article shown in FIG. 1 is shown. An example of the formation pattern of the adhesive portion or the welded portion of the wing portion is shown. Another example of the formation pattern of the adhesive portion or the welded portion of the wing portion is shown.

The absorbent article of the present invention has a main body portion in which the absorber is arranged and a wing portion extending outward in the width direction from the main body portion, and the absorbent article is pants using this wing portion. It can be used by attaching it to underwear such as shorts and shorts. Examples of the absorbent article of the present invention include urine pads (including light incontinence pads) and sanitary napkins. Hereinafter, the absorbent article of the present invention will be specifically described with reference to the drawings, but the present invention is not limited to the embodiments shown in the drawings.

1 to 4 show an example of the absorbent article of the present invention. FIG. 1 shows a plan view of the absorbent article as seen from the skin surface side, FIG. 2 shows a plan view of the absorbent article shown in FIG. 1 as viewed from the outer surface side, and FIG. 3 shows FIGS. 1 and 1. 2 shows a cross-sectional view taken along the line III-III of the absorbent article shown in FIG. 2, and FIG. 4 shows an enlarged plan view of a wing portion of the absorbent article shown in FIG. In the drawings, the arrow x represents the width direction, the arrow y represents the front-back direction, and the direction perpendicular to the surface formed by the arrows x and y represents the thickness direction z.

In the absorbent article, the anteroposterior direction y corresponds to the direction extending in the anteroposterior direction of the wearer's crotch when the absorbent article is worn, and the width direction x is on the same plane as the absorbent article and orthogonal to the anteroposterior direction. It means the direction in which the absorbent article is worn, and corresponds to the left-right direction of the wearer when the absorbent article is attached. The absorbent article also has a skin surface side and an outer surface side with respect to the thickness direction z. The skin surface side means the side facing the skin of the wearer when the absorbent article is worn, and the outer surface side means the side facing the wearer when the absorbent article is worn. The outer surface side of the absorbent article is a surface facing underwear such as pants and shorts (clothing facing surface) when the absorbent article is used, and for example, the outer surface side of the back sheet corresponds to the clothing facing surface.

The absorbent article 1 has a main body portion 2 in which the absorbent body 6 is arranged, and a wing portion 3 extending outward in the width direction x from the main body portion 2. The main body 2 is a portion that is applied to the crotch of the wearer when the absorbent article is attached, and functions to absorb urine or the like excreted from the wearer. The main body portion 2 is preferably formed in a shape long in the front-rear direction y, and is formed in, for example, a substantially rectangular shape, an oval shape, an hourglass shape, a battledore shape, or the like. The wing portion 3 is a portion extending outward in the width direction x from the main body portion 2, and when the absorbent article 1 is attached, the wing portion 3 is folded back toward the outer surface side of the absorbent article 1 to make pants or shorts. Used for fixing to underwear such as. The wing portion 3 extends from the main body portion 2 and is provided on one side and the other side of the width direction x of the main body portion 2, respectively. The absorbent article 1 is preferably formed to be the widest in the wing portion 3. In FIGS. 1 and 2, the boundary line between the main body portion 2 and the wing portion 3 is represented by a alternate long and short dash line.

The main body 2 has a front region F, a rear region R, and an intermediate region M located between them in the front-rear direction y. The front region F includes the front end of the main body 2 and is formed so as to have a predetermined length in the front-rear direction y, and the rear region R includes the rear end of the main body 2 and is predetermined in the front-rear direction y. Formed to have a length of. The intermediate region M is located between the anterior region F and the posterior region R, and is formed adjacent to the anterior region F and the posterior region R. The intermediate region M corresponds to a region in the range in the front-rear direction y extending from the main body portion 2 to the wing portion 3. The intermediate region M is preferably in the range of 20% to 80% when the front end is 0% and the rear end is 100% as the relative position of the absorbent article 1 in the front-rear direction y.

The wing portion 3 is defined as follows, for example, based on the outer edge shape of the absorbent article 1. The rearmost portion where the outer edge of the absorbent article 1 is located most inward in the width direction x is the front side of the base of the wing portion 3 on the front side of the portion where the wing portion 3 extends outward in the width direction x. The outer edge of the absorbent article 1 corresponds to the end (that is, the front end of the boundary line between the main body portion 2 and the wing portion 3) and is behind the portion where the wing portion 3 extends outward in the width direction x. The foremost portion located inward in the width direction x corresponds to the rear end of the base portion of the wing portion 3 (that is, the rear end of the boundary line between the main body portion 2 and the wing portion 3). However, the front end of the base of the wing portion 3 is not located at the front edge of the absorbent article 1, and the posterior end of the base of the wing portion 3 is not located at the posterior edge of the absorbent article 1. The main body portion 2 and the wing portion 3 are separated by a straight line connecting the front end of the base portion and the rear end of the base portion of the wing portion 3. In the vicinity of the front end of the base portion of the wing portion 3 and the vicinity of the rear end of the base portion, the outer edge of the absorbent article 1 extends parallel to the front-rear direction y, or the outer edge of the absorbent article 1 is convex inward in the width direction x. It is preferable that it is formed so as to become.

The wing portion 3 has a base front end and a base rear end in the range of 20% to 80% when the front end is 0% and the rear end is 100% as the relative position of the absorbent article 1 in the front-rear direction y. It is preferably located inside. The length of the wing portion 3 in the front-rear direction y (the length in the front-rear direction y from the front end of the base to the rear end of the base) is preferably 10% or more of the length y in the front-rear direction of the absorbent article 1. 15% or more is more preferable, 50% or less is preferable, and 40% or less is more preferable.

The absorbent article 1 is a portion where the wing portion 3 extends to the outermost side in the width direction x, and the length of each wing portion 3 in the width direction x is 20% of the length of the main body portion 2 in the width direction x. It is preferably formed so as to be 60% or more, and more preferably 30% or more and 50% or less. The length of the wing portion 3 in the width direction x described here means the length of the wing portion 3 extending from the main body portion 2.

As shown in FIG. 4, the wing portion 3 has a wing center 3C and is divided into a front half portion 3F of a portion front of the wing center 3C and a rear half portion 3R of a portion posterior to the wing center 3C. Will be done. The wing center 3C is positioned as follows. That is, in the wing portion 3, the wing portion 3 is on the virtual line 13 extending in the front-rear direction y through a point of half the length extending from the main body portion 2 in the width direction x, and the virtual line 13 is the wing portion 3. The midpoint of the overlapping portion in the front-rear direction y is the wing center 3C.

The main body 2 has a top sheet 4 and a back sheet 5, and it is preferable that the absorber 6 is arranged between them. The top sheet 4 is a sheet located on the wearer side when the absorbent article is used, and is arranged on the skin surface side of the absorbent body 6. The top sheet 4 is preferably liquid permeable. The back sheet 5 is a sheet located on the side opposite to the wearer when the absorbent article is used, and is arranged on the outer surface side of the absorbent body 6. The backsheet 5 is preferably liquid impermeable. The urine or the like excreted from the wearer penetrates the top sheet 4 and is accommodated by the absorber 6, and the back sheet 5 prevents the excrement from leaking to the outside.

Examples of the liquid-permeable top sheet 4 include non-woven fabrics formed of hydrophilic fibers such as cellulose, rayon, and cotton, and polyolefins (for example, polypropylene and polyethylene), polyesters (for example, PET), and polyamides (for example, nylon). ) Or the like, which is a non-woven fabric formed of hydrophobic fibers and whose surface of the hydrophobic fibers is hydrophilized by a surfactant or the like can be used. Further, as the top sheet 4, a woven cloth, a knitted cloth, a perforated plastic film or the like may be used.

As the liquid-impermeable backsheet 5, a non-woven fabric formed of hydrophobic fibers such as polyolefin (for example, polypropylene, polyethylene), polyester (for example, PET), polyamide (for example, nylon), a plastic film, or the like is used. be able to. The back sheet 5 may be composed of a laminated body of two or more sheets, and for example, a laminated body of a non-woven fabric and a plastic film may be used. In this case, it is sufficient that at least one sheet constituting the laminated body is liquid impermeable, and each sheet constituting the laminated body may have the same size or a different size. Liquid impermeable also includes the meaning of water repellency.

The absorber 6 is not particularly limited as long as it contains an absorbent material capable of absorbing excrement such as urine. As the absorber 6, for example, a molded body obtained by molding an absorbent material into a predetermined shape can be used, and the molded body may be a coated sheet such as a paper sheet (for example, tissue paper or thin paper) or a liquid-permeable non-woven fabric. It may be covered. Examples of the absorbent material include hydrophilic fibers such as pulp fibers and water-absorbent resins such as polyacrylic acid-based, polyaspartic acid-based, cellulosic-based, and starch / acrylonitrile-based. Further, the water-absorbent material may include polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as PET, and heat-sealing fibers such as polyamide fibers. These heat-fusing fibers may be hydrophilized with a surfactant or the like in order to enhance the affinity with urine or the like. The absorbent material preferably contains at least a water-absorbent resin from the viewpoint of increasing the absorption capacity.

The absorber 6 may be a sheet-shaped absorber. Examples of the sheet-like absorber include those formed so as to have a water-absorbent resin between the nonwoven fabric sheets and not to have pulp fibers. Since the sheet-shaped absorber thus formed has a water-absorbent resin between the nonwoven fabric sheets, a high absorption capacity can be realized, and since there is no pulp fiber between the nonwoven fabric sheets, it can be formed thin without being bulky. can.

The sheet-shaped absorber may use a water-absorbent fiber as an absorbent material. In this case as well, the sheet-like absorber is not bulky and is formed thin. Examples of the water-absorbent fiber include fibers containing a protonated or salt-formed carboxyl group. For example, a water-absorbent fiber can be obtained by hydrolyzing an acrylic fiber to convert a nitrile group contained in the acrylic fiber into a carboxyl group. At this time, it is preferable that the carboxyl group contained in the water-absorbent fiber forms an alkali metal salt or an ammonia salt. Further, the water-absorbent fiber can be produced by immersing the hydrophilic fiber in acrylic acid and precipitating acrylic acid on the fiber surface.

The shape (planar shape) of the absorber 6 is not particularly limited. Examples of the shape of the absorber 6 include a substantially rectangular shape, an oval shape, an hourglass shape, a battledore shape, and the like.

It is preferable that the main body 2 is provided with side seats 9 on both sides of the top sheet 4 in the width direction x. The side sheet 9 can form leak-proof flaps 10 on both sides of the main body 2 in the width direction x on the skin surface side, and can prevent lateral leakage of urine or the like excreted on the top sheet 4 (FIG. See 3). In this case, the side sheet 9 is joined to the skin surface side of the top sheet 4 at the side joint portion 12, and the inner portion in the width direction x from the side joint portion 12 functions as the leakage-proof flap 10. It is preferable that the elastic member 11 for standing up is provided in the inner portion of the side joint portion 12 of the side sheet 9, and the inner portion of the side sheet 9 in the width direction x due to the contraction force of the elastic member 11 for standing up is worn by the wearer. It becomes easier to stand up toward your skin. It is preferable that the side seat 9 is provided so as to extend outward in the width direction x with respect to the top seat 4. The side sheet 9 is preferably liquid impermeable and can be made of a sheet material that can be used for the back sheet 5.

It is preferable that the main body 2 is provided with a mount 7 between the back sheet 5 and the absorber 6. The mount 7 is provided to prevent the absorbent article 1 (particularly the main body 2) from losing its shape. The mount 7 can be made of a non-woven fabric, paper (for example, tissue paper or thin paper), and may be liquid-permeable or liquid-impermeable.

It is preferable that the entire outer edge of the mount 7 is located inside the outer edge of the main body 2. Therefore, it is preferable that the mount 7 does not exist in the wing portion 3. Further, the outer edge of the mount 7 is preferably located in the vicinity of the outer edge of the main body 2, for example, preferably within 25 mm, more preferably within 20 mm, and within 15 mm from the outer edge of the main body 2. Is even more preferable.

It is preferable that the mount 7 extends anteriorly to the front edge of the absorber 6 and extends posteriorly to the posterior edge of the absorber 6. When the main body portion 2 is formed in this way, the shape-retaining property is ensured at both ends of the main body portion 2 in the front-rear direction y, and the absorber 6 is located near the front side edge and the rear side edge of the main body portion 2. By forming the non-existent portion of the absorbent article 1, when the absorbent article 1 is removed from the wearer's underwear, the absorbent article 1 can be removed from the underwear without touching the existing portion of the absorber 6. The length of the absorber 6 in the anteroposterior direction y is, for example, preferably 60% or more, more preferably 65% or more, further preferably 70% or more, and preferably 95% or less of the length of the backing sheet 7 in the anteroposterior direction. , 90% or less is more preferable, and 85% or less is further preferable. The mount 7 also preferably extends outward from the widthwise outer edge of the absorber 6. As a result, the widthwise end portion of the absorber 6 is less likely to be distorted or broken, and the absorption performance of the absorber 6 is more likely to be stably exhibited.

It is preferable that the adhesive portion 8 is provided on the outer surface side of the absorbent article 1 (see FIG. 2). The adhesive portion 8 is preferably provided on the outer surface side of the wing portion 3, and may be further provided on the outer surface side of the main body portion 2. By providing the adhesive portion 8 on the outer surface side of the absorbent article 1, the absorbent article 1 can be stably fixed to underwear such as pants or shorts.

As shown in FIG. 3, the wing portion 3 is configured by laminating a plurality of sheet members. Specifically, the wing portion 3 has a first sheet 21 on the skin surface side and a second sheet 22 on the outer surface side, and the first sheet 21 and the second sheet 22 are joined to each other. In the first sheet 21 and the second sheet 22, the sheet members constituting the main body 2 are formed so as to extend outward in the width direction x from the main body 2, or a wing sheet is attached to the main body 2. It is formed by. In the former case, the first seat 21 and the second seat 22 can be composed of a top seat, a back seat, and a side seat. In the latter case, the wing seat can be composed of a seat applicable to the top seat and the back seat. One of the first sheet 21 and the second sheet 22 may be composed of a sheet member constituting the main body portion 2, and the other may be composed of a wing portion sheet. It is preferable that no absorber is arranged in the wing portion 3.

The first sheet 21 and the second sheet 22 are preferably composed of sheet members constituting the main body 2. As a result, the rigidity near the boundary between the main body portion 2 and the wing portion 3 does not increase, and when the wing portion 3 is folded back toward the outer surface side of the absorbent article 1 and fixed to underwear such as pants or shorts, the wing portion 3 Even if the wearer's skin hits the folded part, the wearer will not feel any discomfort. In this case, the sheet member constituting the main body 2 extends outward in the width direction x from the intermediate region of the main body 2 to form the first sheet 21 or the second sheet 22. Preferred combinations of the first sheet 21 and the second sheet 22 include a combination of a top sheet and a back sheet, and a combination of a side sheet and a back sheet.Preferably, the side sheet forms the first sheet 21 and the back sheet. Form the second sheet 22. In the absorbent article 1 shown in the drawings, the side sheet 9 forms the first sheet 21 and the back sheet 5 forms the second sheet 22. When the top sheet forms the first sheet, the absorbent article 1 may not be provided with the side sheet.

In the wing portion 3, the first sheet 21 and the second sheet 22 are bonded to each other at the adhesive portion 23 and the welded portion 24. The adhesive portion 23 is formed by applying an adhesive to the first sheet 21 and / or the second sheet 22, and corresponds to a joint portion when the first sheet 21 and the second sheet 22 are bonded to each other with an adhesive. .. The welded portion 24 is formed by welding the first sheet 21 and the second sheet 22 by heat sealing or ultrasonic welding, and corresponds to a bonded portion when the first sheet 21 and the second sheet 22 are joined to each other by welding. do.

5 and 6 show an example of the formation pattern of the adhesive portion 23 or the welded portion 24 of the wing portion 3. In the absorbent article 1, the density of the adhesive portion 23 in the front half portion 3F of the wing portion 3 is formed higher than the density of the adhesive portion 23 in the rear half portion 3R of the wing portion 3, or the wing portion 3 is formed. The amount of adhesive applied to the adhesive portion 23 per unit area on the front half portion 3F of the wing portion 3 is larger than the amount of adhesive applied to the adhesive portion 23 per unit area on the rear half portion 3R of the wing portion 3. Alternatively, the density of the welded portion 24 in the front half portion 3F of the wing portion 3 is formed higher than the density of the welded portion 24 in the rear half portion 3R of the wing portion 3. If the wing portion 3 is formed in this way, the wing portion 3 is formed so that the rigidity of the front half portion 3F is high and the rigidity of the rear half portion 3R is low.

When the rigidity of the wing portion 3 becomes high, when the wing portion 3 is folded back toward the outer surface side of the absorbent article 1 and fixed to the underwear, the wing portion 3 can be easily fixed to the underwear without twisting. Become. On the other hand, when the rigidity of the wing portion 3 becomes low, when the wing portion 3 is folded back toward the outer surface side of the absorbent article 1 and fixed to the underwear, the followability to the movement and distortion of the underwear is enhanced. Therefore, the fixed state of the wing portion 3 to the underwear is easily maintained. Further, when the rigidity of the wing portion 3 becomes low, it becomes difficult for the wearer to feel a sense of discomfort at the portion where the wing portion 3 is fixed to the underwear. In particular, since the rigidity of the rear half portion 3R of the wing portion 3 becomes low, it becomes difficult for the wing portion 3 to strongly hit the crotch portion and buttocks of the wearer in the seated state (in other words, the wing portion 3 in the seated state. The front half 3F is less likely to hit the wearer's crotch and buttocks), and the absorbent article 1 is more comfortable to wear. Therefore, since the wing portion 3 is formed in the absorbent article 1 as described above, the work of attaching the wing portion 3 to the underwear can be facilitated, and the wing portion 3 can be stably attached to the underwear. Moreover, in the seated state, the wing portion 3 is less likely to hit the wearer's crotch and buttocks strongly, and the wearing feeling is improved.

In the wing portion 3 formed as described above, it becomes easy to fold the wing portion 3 near the boundary with the main body portion at the time of manufacturing. Specifically, when the guide member is applied to the wing portion 3 while transporting the absorbent article 1 on the production line with the rear side at the head, the guide member hits the rear half portion 3R having low rigidity, so that the wing portion 3 Smoothly rises from the main body portion 2, and creases are easily formed in the vicinity of the boundary between the main body portion 2 and the wing portion 3.

The density of the adhesive portion 23 of the front half portion 3F of the wing portion 3 is obtained by dividing the area of the adhesive portion 23 of the front half portion 3F, that is, the area of the portion coated with the adhesive by the area of the front half portion 3F. You can ask. The density of the adhesive portion 23 of the rear half portion 3R of the wing portion 3 can be obtained in the same manner. The area of the adhesive portion 23 is measured by peeling off the first sheet and the second sheet, spraying toner (carbon powder) on the first sheet or the second sheet, and measuring the area of the portion where the toner adheres and is visualized in black. Can be obtained by.

The amount of adhesive applied to the adhesive portion 23 per unit area of the front half portion 3F of the wing portion 3 is determined by dividing the weight of the adhesive applied to the front half portion 3F by the area of the front half portion 3F. Can be done. The amount of adhesive applied to the adhesive portion 23 per unit area of the rear half portion 3R of the wing portion 3 can also be obtained in the same manner. The amount of adhesive applied to the adhesive portion 23 is the weight of the residue obtained by cutting out the front half portion 3F or the rear half portion 3R of the wing portion 3, dissolving the adhesive from the cut pieces with a solvent, and distilling off the solvent from the cut pieces. Can be obtained by measuring. Alternatively, the amount of adhesive applied can be obtained from the amount of adhesive used at the time of manufacture.

The density of the welded portion 24 of the front half portion 3F of the wing portion 3 can be obtained by dividing the area of the welded portion 24 of the front half portion 3F by the area of the front half portion 3F. The density of the welded portion 24 of the rear half portion 3R of the wing portion 3 can be obtained in the same manner. The area of the welded portion 24 of the wing portion 3 can be obtained by imaging the appearance of the wing portion 3 from the first sheet side or the second sheet side and measuring the area of the welded portion 24.

The arrangement mode of the adhesive portion 23 or the welded portion 24 in the front half portion 3F and the rear half portion 3R is not particularly limited. On the front half portion 3F, the adhesive portion 23 or the welded portion 24 may be provided on the entire surface. The adhesive portion 23 or the welded portion 24 may be arranged in a predetermined pattern. The adhesive portion 23 can be formed by, for example, a known adhesive application method such as a bead method, a curtain spray method, an omega coating method, a spiral coating method, or a pattern coating method.

As shown in FIGS. 5 and 6, the adhesive portion 23 or the welded portion 24 preferably has a pattern extending linearly in the front-rear direction y and arranged in a plurality of rows in the width direction x. That is, it is preferable that the adhesive portion 23 or the welded portion 24 has a striped pattern extending in the front-rear direction y. By providing the adhesive portion 23 or the welded portion 24 in such a pattern, when the absorbent article 1 is attached to the underwear, the wing portion 3 can be easily folded back toward the outer surface side of the absorbent article 1. Further, the rigidity of the entire wing portion 3 does not become too high, and when the absorbent article 1 is attached to the underwear, not only the rear half portion 3R of the wing portion 3 but also the front half portion 3F strongly hits the wearer's crotch. It becomes difficult to wear, and the wearing feeling of the absorbent article 1 becomes good.

It is preferable that at least a part of the linear adhesive portion 23 or the welded portion 24 extending in the front-rear direction y is arranged so as to cross the wing portion 3 in the front-rear direction y. For example, it is preferable that 1/3 or more (based on the number of lines) of the linear adhesive portion 23 or the welded portion 24 extending in the front-rear direction y is arranged in such a manner, and 1/2 or more is arranged in such a manner. Is more preferable, and it is more preferable that two-thirds or more are arranged in such a manner, and it is particularly preferable that all of them are arranged in such a manner.

As shown in FIG. 5, for example, the linear adhesive portion 23 or the welded portion 24 extending in the front-rear direction y is provided in a continuous linear shape from the front half portion 3F to the rear half portion 3R, and is a line in the front half portion 3F. It is preferable that the average value of the width is larger than the average value of the line width in the rear half portion 3R. By providing the adhesive portion 23 or the welded portion 24 in this way, the rigidity of the wing portion 3 does not change abruptly at the boundary between the front half portion 3F and the rear half portion 3R, and the handleability of the wing portion 3 is improved. .. The average value of the line width in the front half portion 3F or the rear half portion 3R of the adhesive portion 23 or the welded portion 24 is the area of each linear adhesive portion 23 or the welded portion 24 in the front half portion 3F or the rear half portion 3R. The length is obtained, and based on this, the total area and the total length of all the linear adhesive portions 23 or the welded portion 24 in the front half portion 3F or the rear half portion 3R are obtained, and the total of the areas is the sum of the areas. It can be obtained by dividing by the length.

As shown in FIG. 6, for example, as shown in FIG. 6, the average number of linear adhesive portions 23 or welded portions 24 extending in the front-rear direction y arranged side by side in the width direction x in the front half portion 3F is the width in the rear half portion 3R. It may be provided so as to be larger than the average number arranged side by side in the direction x. In this case, if one linear adhesive portion 23 or welding portion 24 extends in the entire front-rear direction y of the front half portion 3F, it is counted as one, and is halved in the front-rear direction y of the front half portion 3F. In the case of extension, the average number of linear adhesive portions 23 or welded portions 24 in the front half portion 3F and the rear half portion 3R can be obtained by counting as 0.5. If the adhesive portion 23 or the welded portion 24 is provided in this way, it becomes easy to arbitrarily adjust the rigidity of the front half portion 3F and the rigidity or flexibility of the rear half portion 3R, and the front half portion 3F and the rear of the wing portion 3 are easily adjusted. It becomes easy to impart desired properties to the side half portion 3R.

The line width and pitch of the linear adhesive portion 23 or the welded portion 24 extending in the front-rear direction y should be appropriately set in consideration of the joint strength between the first sheet 21 and the second sheet 22 and the rigidity or flexibility of the wing portion 3. Just do it. The line width of the linear adhesive portion 23 or the welded portion 24 is, for example, preferably 0.3 mm or more, more preferably 0.5 mm or more, further preferably 1 mm or more, preferably 6 mm or less, more preferably 5 mm or less, and 4 mm. The following is more preferable. The pitch of the linear adhesive portion 23 or the welded portion 24 (distance between the centers of the adjacent linear adhesive portions 23 or the welded portion 24) is, for example, preferably 1 mm or more, more preferably 2 mm or more, and preferably 15 mm or less. , 12 mm or less is more preferable, and 10 mm or less is further preferable.

The type of the adhesive forming the adhesive portion 23 is not particularly limited, but it is convenient in manufacturing to use a hot melt adhesive. The adhesive may be, for example, a rubber-based adhesive such as natural rubber-based, butyl rubber-based, or polyisoprene; styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene. -It is preferable to contain a styrene-based elastomer such as an ethylene-butadiene-styrene block copolymer (SEBS) and a styrene-ethylene-propylene-styrene block copolymer (SEPS) as a base polymer. Further, as the base polymer, ethylene-vinyl acetate copolymer (EVA); polyester; acrylic elastomer; polyolefin-based elastomer or the like may be used. The adhesive may contain a tackifier, a softener, a wax, a stabilizer and the like.

The amount of the adhesive applied to the adhesive portion 23 per unit area in the front half portion 3F or the rear half portion 3R of the wing portion 3 is preferably set appropriately between 1 g / m ² and 30 g / m ² . The amount of the adhesive applied is more preferably 3 g / m ² or more, further preferably 5 g / m ² or more, still more preferably 25 g / m ² or less, still more preferably 20 g / m ² or less.

The center of the wing portion 3 in the front-rear direction, that is, the wing center 3C is preferably located in front of the center of the main body portion 2 in the front-rear direction y. By providing the wing portion 3 in this way, the front half portion 3F of the wing portion 3 is less likely to hit the wearer's crotch portion and buttocks in the seated state, and the wearing feeling of the absorbent article 1 is improved.

As shown in FIGS. 1 and 2, it is preferable that the absorber 6 has both side edges in the width direction x linearly formed at a portion overlapping the wing portion 3 with respect to the front-rear direction y. When the absorber 6 is formed in such a shape, the wing portion 3 can be easily folded back toward the outer surface side of the absorbent article 1 along both side edges of the linearly formed absorber 6 in the width direction x. Therefore, the work of attaching the wing portion 3 to the underwear becomes easy. From the same viewpoint, it is preferable that the mount 7 has both side edges in the width direction x formed linearly at a portion overlapping the wing portion 3 with respect to the front-rear direction y.

1: Absorbent article 2: Main body 3: Wing part, 3C: Wing center, 3F: Front half part, 3R: Rear half part 4: Top sheet 5: Back sheet 6: Absorber 7: Mount 8: Adhesive part 9: Side sheet 10: Leakage-proof flap 13: Virtual line 21: First sheet 22: Second sheet 23: Adhesive part 24: Welding part

Claims (7)

A main body having an anterior region, a posterior region, and an intermediate region located between them in the front-rear direction, and an absorber arranged therein.
An absorbent article having a wing portion extending outward in the width direction from the intermediate region of the main body portion.
The wing portion has a first sheet on the skin surface side and a second sheet on the outer surface side, and the first sheet and the second sheet are bonded to each other at an adhesive portion.
It is on a virtual line extending in the front-rear direction through a point of half the length of the wing portion extending in the width direction from the main body portion, and the center of the wing is the midpoint in the front-rear direction of the portion where the virtual line overlaps the wing portion. As a result, the wing portion is divided into a front half portion of a portion front of the wing center and a rear half portion of a portion posterior to the wing center.
An absorbent article characterized in that the density of the adhesive portion in the front half portion of the wing portion is higher than the density of the adhesive portion in the rear half portion of the wing portion. A main body having an anterior region, a posterior region, and an intermediate region located between them in the front-rear direction, and an absorber arranged therein.
An absorbent article having a wing portion extending outward in the width direction from the intermediate region of the main body portion.
The wing portion has a first sheet on the skin surface side and a second sheet on the outer surface side, and the first sheet and the second sheet are bonded to each other at an adhesive portion.
It is on a virtual line extending in the front-rear direction through a point of half the length of the wing portion extending in the width direction from the main body portion, and the center of the wing is the midpoint in the front-rear direction of the portion where the virtual line overlaps the wing portion. As a result, the wing portion is divided into a front half portion of a portion front of the wing center and a rear half portion of a portion posterior to the wing center.
The feature is that the amount of adhesive applied to the adhesive portion per unit area in the front half of the wing portion is larger than the amount of adhesive applied to the adhesive portion per unit area in the rear half of the wing portion. Absorbent article. A main body having an anterior region, a posterior region, and an intermediate region located between them in the front-rear direction, and an absorber arranged therein.
An absorbent article having a wing portion extending outward in the width direction from the intermediate region of the main body portion.
The wing portion has a first sheet on the skin surface side and a second sheet on the outer surface side, and the first sheet and the second sheet are joined to each other at a welded portion.
It is on a virtual line extending in the front-rear direction through a point of half the length of the wing portion extending in the width direction from the main body portion, and the center of the wing is the midpoint in the front-rear direction of the portion where the virtual line overlaps the wing portion. As a result, the wing portion is divided into a front half portion of a portion front of the wing center and a rear half portion of a portion posterior to the wing center.
An absorbent article characterized in that the density of the welded portion in the front half of the wing is higher than the density of the welded portion in the rear half of the wing. The absorbent article according to any one of claims 1 to 3, wherein the adhesive portion or the welded portion extends linearly in the front-rear direction and has a pattern arranged in a plurality of rows in the width direction. The adhesive portion or the welded portion is provided in a continuous linear shape from the front half portion to the rear half portion, and the average value of the line width in the front half portion is the average of the line width in the rear half portion. The absorbent article according to claim 4, which is larger than the value. The main body includes a top sheet arranged on the skin surface side of the absorber, a back sheet arranged on the outer surface side of the absorber, and side sheets arranged on both sides of the top sheet in the width direction. Have and
Claim 1 in which the back sheet and the side sheet extend outward in the width direction from an intermediate region of the main body portion, the side sheet forms the first sheet, and the back sheet forms the second sheet. The absorbent article according to any one of 5 to 5. The absorbent article according to any one of claims 1 to 6, wherein the center of the wing portion in the front-rear direction is located on the front side of the center of the main body portion in the front-rear direction.

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