JP2015150057A - absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article with less leakage of urine or the like from the sides.SOLUTION: An absorbent article 1 includes a top sheet 2, a back sheet 3, and an absorbent laminate 10 provided therebetween. The top sheet 2 is provided with standing flaps 5 on both sides in the width direction x. The absorbent laminate 10 includes a first absorber 11 and a second absorber 21 in order from the side of the top sheet 2. The first absorber 11 consists of a left first-absorber segment 11A and a right first-absorber segment 11B. The left first-absorber segment 11A is provided apart from the right first-absorber segment 11B in the width direction x. The left first-absorber segment 11A and the right first-absorber segment 11B each contain a water-absorbent resin between sheet members and do not contain pulp fibers, and are disposed nearer to the center in the width direction x than the bases 6 of the standing flaps 5. The second absorber 21 contains a water-absorbent resin and pulp fibers, and extends further from the center in the width direction x than the bases 6 of the standing flaps 5.

Description

  The present invention relates to absorbent articles such as urine pads (including light incontinence pads), sanitary napkins, disposable diapers and the like.

  Conventionally, in order to prevent side leakage of urine or the like, absorbent articles having various devices are known. For example, Patent Document 1 has a top sheet, a back sheet, and an absorbent core provided therebetween, and the absorbent core is provided with a diffuser in which a groove extending in the front-rear direction is formed on the back sheet side. An absorbent article is disclosed in which a sheet-like absorbent layer having a water-absorbing resin between nonwoven fabric sheets and having no pulp fibers is provided between the top sheet and the absorbent core on both sides in the width direction of the diffuser. Yes. Patent Document 2 discloses an absorbent article having a top sheet, a back sheet, and an absorbent body provided therebetween, and three-dimensional gathers provided on both sides in the width direction, and a nonwoven fabric on the upper surface of the absorbent body. There is disclosed an absorbent article in which a water-absorbing laminated sheet provided with a water-absorbing layer containing a water-absorbing resin and an adhesive therebetween overlaps with a three-dimensional gather.

JP 2012-050744 A JP 2013-116212 A

  In the absorbent article disclosed in Patent Document 1, lateral leakage of urine and the like is prevented by the sheet-like absorbent layers provided on both sides in the width direction of the upper surface of the absorbent core. In the absorbent article disclosed in Patent Document 2, lateral leakage of urine and the like is prevented by the water-absorbing laminated sheets provided on both sides of the upper surface of the absorbent body in the width direction. Thus, preventing side leakage in the absorbent article is a basic characteristic that the absorbent article should have, and there is a need for an absorbent article that can more effectively prevent side leakage such as urine.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an absorbent article in which side leakage of urine or the like hardly occurs.

  The absorbent article of the present invention capable of solving the above problems is an absorbent article having a width direction and a front-rear direction, and having a top sheet, a back sheet, and an absorbent laminate provided therebetween. A rising flap extending in the front-rear direction is provided on both sides in the width direction of the top sheet; the absorbent laminate has a first absorbent body and a second absorbent body from the top sheet side; The left first absorbent body and the right first absorbent body are configured such that the left first absorbent body and the right first absorbent body are spaced apart in the width direction; the left first absorbent body and the right first absorbent body are: A sheet member including a plurality of layers, having a water-absorbing resin between the sheet members and having no pulp fiber, and is provided inward in the width direction from the base that becomes the starting point of the rising flap; The absorber contains water-absorbing resin and pulp fiber. And has a feature where provided so as to extend outward in the width direction than the base of the rising flaps.

  Since the absorbent article of the present invention is provided with the first absorbent body and the second absorbent body as described above, the first absorbent body functions as a diffusion preventing wall for urine and the like, and side leakage of urine and the like hardly occurs. Become. That is, when the first absorbent body absorbs urine or the like, the water absorbent resin contained in the first absorbent body swells and the first absorbent body swells in the vertical direction. As a result, the first absorbent body forms a diffusion prevention wall. In this way, urine or the like is easily absorbed by the second absorbent body without causing side leakage. Moreover, even if urine etc. spreads outward in the width direction beyond the first absorber, the urine etc. moves to the second absorber through the gap between the first absorber and the base of the rising flap. Therefore, side leakage is prevented in two stages. Therefore, the absorbent article of the present invention has an excellent side leakage prevention function.

  The second absorbent body is formed with a groove or opening extending in the front-rear direction facing a space where the left first absorbent body and the right first absorbent body are separated from each other in a molded body containing a water absorbent resin and pulp fibers. It is preferable. By providing the grooves or openings in the second absorbent body in this way, urine excreted from the wearer easily diffuses in the front-rear direction of the second absorbent body, and urine is quickly absorbed by the second absorbent body. Will come to be.

  It is preferable that the left first absorbent body and the right first absorbent body are provided 10 mm or more and 35 mm or less apart in the width direction from a groove or opening provided in the second absorber. If the first absorbent body is formed in this way, a sufficient space for urine and the like to diffuse between the left first absorbent body and the right first absorbent body is easily secured, and urine and the like are more suitable for the second absorbent body. Easily absorbed.

  The left first absorbent body and the right first absorbent body have a sealing portion in which sheet members are joined to each other in the width direction, and a non-sealing portion formed between the sealing portions. It is preferable that a water-absorbing resin is disposed in the part. By forming the left first absorbent body and the right first absorbent body in this way, the left first absorbent body and the right first absorbent body absorb urine and the like and swell in the vertical direction, so that the height is higher. It becomes easy to form a diffusion prevention wall.

  The water-absorbing resin disposed in the first absorber preferably has a water absorption rate of 20 seconds or less by the vortex method. If the water absorbent resin having a high water absorption speed is arranged on the first absorbent body, the water absorbent resin of the first absorbent body swells when urine or the like comes into contact with the first absorbent body, thereby preventing diffusion. Walls are quickly formed. As a result, in the absorbent article, a high diffusion prevention wall is easily formed from the first excretion, and side leakage such as urine is less likely to occur.

  On the other hand, it is preferable that the water absorbing resin disposed in the second absorbent body has a water absorption speed of 40 seconds or more by a vortex method. If the water absorbent resin arranged in the second absorbent body has such a water absorption rate, the diffusibility of urine and the like in the second absorbent body is enhanced, and the absorbent capacity of the second absorbent body is utilized over a wide range. Become so.

  It is preferable that the outer edge in the width direction of the left first absorbent body and the right first absorbent body is spaced 15 mm or more and 50 mm or less inward from the base of the rising flap. If the first absorber is provided in this manner, urine or the like overflowing from the first absorber is easily transferred to the second absorber, and the absorption capacity of the first absorber is increased.

  In the absorbent article of the present invention, the left first absorbent body and the right first absorbent body are provided to be spaced apart from each other in the width direction, and are provided inward in the width direction from the base portion of the rising flap. Since the second absorbent body provided in the first absorbent body is provided so as to extend outward in the width direction from the base portion of the rising flap, when the first absorbent body absorbs urine or the like, a diffusion prevention wall is formed, and urine or the like is formed. Side leakage is less likely to occur. Even if urine etc. spreads outward in the width direction beyond the first absorber, the urine etc. moves to the second absorber through the gap between the first absorber and the base of the rising flap. Since it can be absorbed, so-called side leakage is prevented in two stages. Therefore, the absorbent article of the present invention has an excellent side leakage prevention function.

An example of the absorbent article of this invention is represented, and the top view of an absorbent article is represented. II-II sectional drawing of the absorbent article shown in FIG. 1 is represented. The top view of the absorptive laminate provided in the absorptive article shown in Drawing 1 is expressed. The IV-IV sectional view of the absorptive layered product shown in Drawing 3 is expressed.

  The absorbent article of the present invention has a top sheet, a back sheet, and an absorbent laminate provided therebetween. Examples of the absorbent article of the present invention include urine pads (including incontinence pads), disposable diapers, sanitary napkins and the like.

  The absorbent article has a front-rear direction and a width direction. The “front-rear direction” means a direction extending in the front-rear direction of the wearer's crotch when the wearer wears the absorbent article. “Width direction” means a direction that is on the same plane as the absorbent article and is orthogonal to the front-rear direction. In the present invention, the “upper side” means the wearer side when the absorbent article is worn, and the “lower side” is the side opposite to the wearer when the absorbent article is worn, that is, the outer side. Means. A direction extending from the upper side to the lower side is defined as a vertical direction.

  The shape of the absorbent article is not particularly limited. When the absorbent article is a urine pad, examples of the shape of the absorbent article include a substantially rectangular shape, an hourglass shape, a gourd shape, a battledore shape, and the like.

  When the absorbent article is a disposable diaper, the absorbent article includes, for example, a front abdomen, a back part, and a crotch portion provided between them and provided with an absorbent laminate. As a disposable diaper, for example, an absorbent main body in which an absorbent laminate is disposed between a top sheet and a back sheet on the skin side surface of a pants member including a front abdomen, a back part, and a crotch part located between them May be provided. At this time, a substantially rectangular shape or the like is shown as the shape of the absorbent main body. Moreover, as a disposable diaper, the laminated body by which the absorptive laminated body was distribute | arranged between the top sheet | seat and the back sheet | seat may form a front part, a back part, and a crotch part located among these. In addition, a front part corresponds to the part which contacts a wearer's belly side when wearing a disposable diaper, and a back part corresponds to the part which contacts a wearer's back side when wearing a disposable diaper. A crotch part is located between a front part and a back part, and is corresponded to the part which hits a wearer's crotch.

  When the absorbent article is a disposable diaper, the disposable diaper is an open type (tape type) disposable in which a pair of fastening members are provided on the left and right ends of the back portion, and formed into a pants shape when worn by the fastening members. It may be a diaper or a pants-type disposable diaper in which a waist opening and a pair of leg openings are formed.

  The top sheet is a sheet located on the wearer side when the absorbent article is worn, and is preferably liquid permeable. As the top sheet, for example, a nonwoven fabric formed from hydrophilic fibers such as cellulose, rayon, and cotton, and a hydrophobic property such as polyolefin (eg, polypropylene, polyethylene), polyester (eg, PET), polyamide (eg, nylon), etc. A non-woven fabric formed from fibers, in which the surface of hydrophobic fibers is hydrophilized with a surfactant, can be used. Further, as the top sheet, a woven fabric, a knitted fabric, a plastic film in which holes are formed, or the like may be used.

  The back sheet is a sheet located on the side opposite to the wearer when the absorbent article is worn, that is, on the outside, and is preferably liquid-impermeable. As the back sheet, a non-woven fabric formed from hydrophobic fibers such as polyolefin (for example, polypropylene, polyethylene), polyester (for example, PET), polyamide (for example, nylon), a plastic film, or the like can be used. Moreover, you may use the laminated body of a nonwoven fabric and a plastic film. In the present invention, the liquid impermeability includes the meaning of water repellency.

  The pant member may be liquid permeable or liquid impermeable, and a sheet material usable for a top sheet or a back sheet can be used. The pant member is preferably formed by laminating the outer sheet on the inner sheet, and more preferably formed by laminating the liquid-impermeable outer sheet on the hydrophilic inner sheet.

  When using a nonwoven fabric as each sheet material demonstrated above, it is preferable to use a spunbond nonwoven fabric, an air through nonwoven fabric, a point bond nonwoven fabric, a melt blown nonwoven fabric, an airlaid nonwoven fabric, an SMS nonwoven fabric, etc. as a nonwoven fabric.

  The absorbent article is provided with rising flaps on both sides in the width direction. By providing the rising flap, side leakage of urine and the like is prevented. The rising flaps are preferably provided on both sides of the top sheet in the width direction, so that urine excreted from the wearer penetrates the top sheet without forming a liquid pool between the rising flaps. It becomes easy to be quickly absorbed by the absorbent laminate.

  The rising flap is formed, for example, by joining side sheets extending in the front-rear direction on both sides in the width direction of the top sheet and providing an elastic member inward in the width direction of the side sheet. By providing the side sheet and the elastic member in this manner, the inner side in the width direction of the side sheet rises toward the wearer's skin due to the contraction force of the elastic member, and a rising flap is formed. The rising flap or the side sheet is preferably composed of a liquid-impermeable plastic film, a liquid-impermeable nonwoven fabric, or the like.

  As the elastic member provided on the rising flap, an elastic stretchable material used for absorbent articles such as ordinary disposable diapers such as polyurethane yarn, polyurethane film, and natural rubber can be used. The elastic member is preferably fixed in a stretched state with a hot melt adhesive. For example, polyurethane yarn having a fineness of 40 to 1,240 dtex is stretched and arranged at a magnification of 1.1 to 5.0 times and fixed. As the joining means, a rubber-based hot melt adhesive is preferably used. The magnification is 1.0 in the non-expanded state.

  The absorbent laminate is disposed between the top sheet and the back sheet, and absorbs and holds urine or the like excreted from the wearer and permeated through the top sheet. An absorptive layered product has the 1st absorber and the 2nd absorber from the top sheet side, and the 1st absorber comprises the left side 1st absorber and the right side 1st absorber. The left first absorbent body and the right first absorbent body are respectively disposed on the left side and the right side as viewed from the wearer of the absorbent article. In the following description, the left first absorber and the right first absorber may be collectively referred to as “first absorber”. In the absorbent laminate, the first absorber is disposed on the upper side of the second absorber. The first absorbent body is preferably disposed on the uppermost side of the absorbent laminate, and the first absorbent body is provided adjacent to the second absorbent body. Note that another absorber (that is, a third absorber) may be provided below the second absorber.

  The first absorbent body includes a plurality of layers of sheet members, and is configured to have a water absorbent resin between the sheet members and have no pulp fibers. On the other hand, a 2nd absorber contains a water absorbing resin and a pulp fiber.

  The first absorbent body is provided with sheet members on the upper side and the lower side of the water-absorbent resin, so to speak, it has an upper sheet member and a lower sheet member. The upper sheet member and the lower sheet member may be composed of separate sheet members, and one sheet member is folded, and the folded one side is used as the upper sheet member and the other side is used as the lower sheet member. Also good.

  The sheet member provided in the first absorbent body is liquid permeable, for example, a nonwoven fabric formed from hydrophilic fibers such as cellulose, rayon, and cotton, polyolefin (for example, polypropylene, polyethylene), polyester (for example, PET). A non-woven fabric formed from hydrophobic fibers such as polyamide (for example, nylon), the surface of the hydrophobic fibers being hydrophilized with a surfactant can be used. Further, a woven fabric, a knitted fabric, a perforated plastic film or the like may be used as the sheet member. Preferably, a non-woven sheet member (non-woven sheet) is used as the sheet member.

  In the first absorbent body, the water absorbent resin is disposed between the upper sheet member and the lower sheet member, but the pulp fiber is not disposed between these sheet members. In addition, in the 1st absorber, presence of the pulp fiber mixed unavoidable on manufacture is accept | permitted. Since a 1st absorber is comprised so that it may have a water absorbing resin between a sheet | seat member, and it may not have a pulp fiber, it can be formed thin, having a high absorption capacity.

  Examples of water-absorbing resins include polyacrylic acid-based water-absorbing resins such as sodium polyacrylate; starch-acrylic graft copolymers, starch-acrylic acid graft copolymers, starch-acrylamide graft copolymers, and other starch-based water-absorbing resins. Water-absorbing resin: Polyvinyl alcohol-based water-absorbing resin such as crosslinked polyvinyl alcohol can be used. As the water-absorbing resin, it is preferable to use a polyacrylic acid-based water-absorbing resin such as sodium polyacrylate because it has a high liquid absorption.

  The second absorbent contains a water absorbent resin and pulp fibers. As the water absorbent resin contained in the second absorbent body, the water absorbent resin described above can be used. The water-absorbing resin disposed in the first absorber and the water-absorbing resin disposed in the second absorber may be the same or different, but as described later, the water absorbing resin disposed in the first absorber. It is preferable that the water-soluble resin has a higher water absorption rate than the water-absorbing resin disposed in the second absorbent body. The 2nd absorber contains water absorbing resin, and the holding | maintenance capability, such as urine, is improved. As the pulp fiber contained in the second absorber, defibrated pulp fiber is preferably used, and the defibrated pulp fiber is preferably used as a fiber mass. By containing pulp fibers, the second absorbent achieves rapid absorption of urine and the like, and diffusibility of urine and the like in the second absorbent is enhanced.

  It is preferable that a 2nd absorber has a molded object containing a water absorbing resin and a pulp fiber. The molded body only needs to include a water absorbent resin and pulp fibers and have a predetermined shape, and the molded body may be covered with a covering sheet such as a paper sheet (for example, tissue paper) or a liquid-permeable nonwoven sheet. Good. In the molded product, the water-absorbent resin and the pulp fiber may be mixed uniformly, or may be mixed non-uniformly, and the water-absorbent resin may be dispersed on the pulp fiber.

  The content of the water absorbent resin in the second absorber is not particularly limited, but is preferably 5% by mass or more, more preferably 10% by mass or more, and preferably 40% by mass or less, more preferably 30% by mass or less. When the content of the water absorbent resin is 5% by mass or more, the retention capacity of the second absorbent body such as urine is increased, and when the content of the water absorbent resin is 40% by mass or less, urine etc. is contained in the second absorbent body. It becomes easy to be absorbed quickly.

The basis weight of the second absorber is preferably 90 g / m ² or more, more preferably 100 g / m ² or more, preferably 150 g / m ² or less, and more preferably 140 g / m ² or less. If the range having a basis weight of 90g / m ² ~150g / m ² of the second absorbent body, not too thick thickness of the second absorber, the second absorber having excellent absorption properties such as urine is likely to give .

  In the absorbent article of the present invention, the left first absorbent body and the right first absorbent body are provided apart from each other in the width direction, and are provided inward in the width direction from the rising flap, and the second absorbent body is It is provided so as to extend outward in the width direction from the rising flap. That is, rising flaps extending in the front-rear direction are provided on both sides in the width direction of the top sheet, the left first absorbent body and the right first absorbent body are provided apart from each other in the width direction, and the left first absorbent body and the right The first absorber is provided inward in the width direction from the base that is the starting point of the rising flap, and the second absorber is provided to extend outward in the width direction from the base of the rising flap. . Preferably, the second absorbent body is provided such that a molded body containing the water absorbent resin and the pulp fiber extends outward in the width direction from the base portion of the rising flap. That is, in the absorbent article of the present invention, the outer edges in the width direction of the left first absorbent body and the right first absorbent body are positioned inward in the width direction from the base portion of the rising flap. Both end edges in the width direction of the absorber will be located outward in the width direction from the base portion of the rising flap.

  Since the absorbent article of the present invention is provided with the first absorbent body and the second absorbent body as described above, the first absorbent body functions as a diffusion preventing wall for urine and the like, and side leakage of urine and the like hardly occurs. Become. That is, when the first absorbent body absorbs urine or the like, the water absorbent resin contained in the first absorbent body swells and the first absorbent body swells in the vertical direction. As a result, the first absorbent body forms a diffusion prevention wall. In this way, urine or the like is easily absorbed by the second absorbent body without causing side leakage. This is because when the absorbent article is not used, the first absorbent body does not absorb urine or the like, so that the first absorbent body can be used when the absorbent article is used even though the absorbent laminate can be made thin. Means that a high diffusion prevention wall can be formed by absorbing urine and the like. Furthermore, in the absorbent article of the present invention, even if urine etc. spreads outward in the width direction beyond the first absorber, the urine etc. passes through the gap between the first absorber and the base of the rising flap. Since it can transfer to the 2nd absorber and can absorb, so to speak, side leakage will be prevented in two steps. On the other hand, since the 2nd absorber contains a water absorbing resin and pulp fiber, it can absorb urine etc. which spread outward in the width direction beyond the 1st absorber. Therefore, the absorbent article of the present invention has an excellent side leakage prevention function.

  The absorbent article of the present invention is also a first absorbent body configured to have a water absorbent resin between sheet members and no pulp fiber on a second absorbent body containing a water absorbent resin and pulp fibers. However, since it is arranged inward in the width direction from the base portion of the rising flap, it is excellent in preventing reverse return (wet back) of urine and the like. Since the first absorbent body is not configured so as to have a water-absorbing resin between the sheet members and no pulp fibers, the surface is maintained in a relatively dry state even when urine is absorbed. On the other hand, the second absorbent body tends to be in a wet state when it absorbs urine and the like, and there is a risk that a part of the urine and the like absorbed by pressing will reverse. However, the presence of the first absorber disposed on the top sheet side of the second absorber makes it easier to prevent urine from returning from the second absorber and reaching the wearer's skin.

  In the absorbent article of the present invention, it is preferable that the first absorbent body is provided inward in the width direction rather than the base portion of the rising flap over the entire front-rear direction. It is preferable that the second absorbent body is provided so as to extend outward in the width direction from the base portion of the rising flap throughout the entire front-rear direction. Moreover, it is preferable that the 2nd absorber is extended outward rather than the outer edge of the width direction of a 1st absorber over the whole front-back direction.

  The distance between the left first absorbent body and the right first absorbent body is not particularly limited, but urine or the like excreted from the wearer is a portion between the left first absorbent body and the right first absorbent body of the second absorbent body. In view of suitable absorption, the separation distance is preferably 30 mm or more, more preferably 35 mm or more, and further preferably 40 mm or more. On the other hand, the distance is preferably 100 mm or less, more preferably 85 mm or less, and even more preferably 75 mm or less, from the viewpoint of sufficiently ensuring a space between the first absorber and the base of the rising flap.

  The left first absorbent body and the right first absorbent body are preferably provided with the outer edges in the width direction spaced apart by 15 mm or more inward from the base of the rising flap, more preferably 25 mm or more. More preferably, the distance is 30 mm or more. If the 1st absorber is provided in this way, it will become easy to transfer urine etc. which overflowed from the 1st absorber to the 2nd absorber quickly. Moreover, it is preferable that the edge of the width direction is provided in the 1st absorber inwardly 50 mm or less away from the base part of the rising flap, and it is more preferable that it is 45 mm or less apart. If the first absorbent body is provided in this way, the left-side first absorbent body and the right-side first absorbent body are easily separated from each other, and urine etc. excreted from the wearer is promptly provided to the second absorbent body. It becomes easy to be absorbed.

  The left first absorbent body and the right first absorbent body are spaced apart from each other in the width direction, so that a space is formed between the left first absorbent body and the right first absorbent body. The laminated body is preferably formed so as to include a center line in the width direction (that is, a center line extending in the front-rear direction), and is preferably formed at the center in the width direction.

  The length in the front-rear direction of the first absorber and the second absorber is not particularly limited. The first absorbent body and the second absorbent body may have the same length in the front-rear direction, and the first absorbent body may be formed longer in the front-rear direction than the second absorbent body. May be longer in the front-rear direction than the first absorber.

  The second absorber is preferably provided with a groove or opening extending in the front-rear direction. Specifically, it is preferable that a groove or an opening extending in the front-rear direction is formed in the molded body of the second absorbent body. At this time, the groove or opening of the second absorbent body is preferably provided facing the space where the left first absorbent body and the right first absorbent body are separated. By providing the grooves or openings in the second absorbent body in this way, urine excreted from the wearer easily diffuses in the front-rear direction of the second absorbent body, and urine is quickly absorbed by the second absorbent body. Will come to be.

  In the present invention, the “opening” is provided penetrating in the vertical direction, while the “groove” means a depression formed on the surface and is defined as having a bottom surface. Further, when the groove or opening is provided in the molded body of the second absorbent body so as to face the space between the left first absorbent body and the right first absorbent body, the groove or opening is formed on the upper surface (first (The surface on the side facing one absorbent body) may be formed so as to overlap the space between the left first absorbent body and the right first absorbent body. For example, the groove or opening of the molded body is covered with a covering sheet. May be.

  It is preferable that the groove | channel or opening provided in a 2nd absorber is provided so that a wearer's urination part vicinity may be faced. For example, the groove or opening of the second absorber is at least 30% to 60% (more preferably) when the front end is 0% and the rear end is 100% relative to the longitudinal direction of the second absorber. Is preferably in the range of 25% to 70%. The groove or opening of the second absorber is preferably provided so as to include the center line in the width direction of the second absorber (that is, the center line extending in the front-rear direction), and more preferably provided in the center in the width direction. . Further, it is preferable that the second absorber is provided with only one groove or opening.

  The groove | channel or opening of a 2nd absorber may be provided in the whole front-back direction of a 2nd absorber, and may be provided in a part of front-back direction. In addition, it is preferable that the groove | channel or opening of a 2nd absorber is provided only in a part of the front-back direction of a 2nd absorber, and urine etc. absorb by providing a groove | channel or opening in a 2nd absorber in this way. The leaky laminate is less likely to leak in the front-rear direction. In this case, it is preferable that both ends of the groove or the opening in the front-rear direction are provided so as to be positioned inward in the front-rear direction than the front end and the rear end of the second absorber. For example, the groove or opening of the second absorber has a front end of 0% and a rear end of 100% relative to the longitudinal direction of the second absorber, and the front end of the groove or opening is 10% to 30%. % (More preferably 15% to 25% range), and the rear end of the groove or opening is preferably 60% to 90% (more preferably 70% to 85% range). . The shape of the groove or opening of the second absorber is not particularly limited as long as it extends in the front-rear direction, and examples thereof include a rectangle, a rectangle with rounded corners, an ellipse, a polygon, an hourglass, and a dumbbell.

  It is preferable that a groove is formed in the second absorbent body. By providing a groove instead of an opening in the molded body of the second absorbent body, leakage from the backsheet side of the absorbent article is less likely to occur. In addition, urine and the like are easily absorbed by the second absorber. Furthermore, urine or the like is easily absorbed by the first absorber via the second absorber, and a diffusion prevention wall is easily formed by the first absorber.

  When a groove is formed in the molded body of the second absorbent body, the molded body has an upper molded body provided on the top sheet side and a lower molded body provided on the back sheet side, and the upper molded body is front and rear. A groove extending in the front-rear direction may be formed in the molded body by providing an opening extending in the direction and providing the lower molded body overlapping the opening of the upper molded body. In this case, the lower molded body is arranged below the upper molded body so as to completely cover the opening of the upper molded body. By configuring the molded body in this way, it is possible to easily form a groove in the second absorbent body in production.

  The width (length in the width direction) of the groove or opening of the second absorber is, for example, preferably 8 mm or more, more preferably 10 mm or more, and preferably 30 mm or less, more preferably 25 mm or less. If the width of the groove or opening of the second absorber is 8 mm or more, the diffusibility of urine or the like in the front-rear direction is enhanced, and if the width of the groove or opening of the second absorber is 30 mm or less, the second absorption is achieved. The body's absorption capacity increases.

  It is preferable that the left first absorbent body and the right first absorbent body extend outward in the front-rear direction from the groove or opening of the second absorbent body. It is preferable that the left first absorbent body and the right first absorbent body are also provided outward in the width direction rather than the grooves or openings provided in the second absorbent body. In this case, the inner edges in the width direction of the left first absorber and the right first absorber are positioned outward in the width direction from the grooves or openings of the second absorber. If the first absorbent body and the second absorbent body are formed in this way, the urine excreted from the wearer is easily guided to the groove or opening of the second absorbent body, and the urine is absorbed into the absorbent laminate. It becomes easy to diffuse suitably in the front-back direction of the body.

  The left first absorber and the right first absorber are preferably provided 10 mm or more apart in the width direction from a groove or opening provided in the second absorber, more preferably 12 mm or more, and 35 mm or less. It is preferable that they are separated, more preferably 25 mm or less. If the first absorbent body is formed in this way, a sufficient space for urine to diffuse between the first absorbent bodies on both sides is secured, and also between the first absorbent body and the base of the rising flap. Sufficient space for urine and the like to move to the second absorber is easily secured, and urine and the like are easily absorbed by the second absorber.

  It is preferable that the 1st absorber and the 2nd absorber are mutually joined by the adhesive bond layer formed between these. The adhesive layer is preferably formed of, for example, a rubber adhesive or a styrene elastomer described later. If the first absorbent body and the second absorbent body are bonded to each other by an adhesive, the first absorbent body is fixed at an appropriate position on the second absorbent body, and the absorbent article can easily perform a desired function. .

  It is preferable that the left first absorbent body and the right first absorbent body are formed with a sealing portion in which sheet members are joined to both sides in the width direction and a non-sealing portion formed between the sealing portions. It is preferable that a water-absorbing resin is disposed in the non-sealing portion to form an absorption region. By forming the left first absorbent body and the right first absorbent body in this way, the left first absorbent body and the right first absorbent body swell in the vertical direction by absorbing urine etc. High diffusion prevention walls are easily formed. The sealing portion is formed by joining sheet members with an adhesive, heat sealing (thermal fusion), or ultrasonic bonding. A sealing part is prescribed | regulated as a part where sheet members are joined, and presence of the water absorbing resin in a sealing part is accept | permitted.

  The sealing portion is preferably provided so as to extend over the entire length of the first absorbent body in the front-rear direction. Moreover, it is preferable that an absorption area | region is provided so that it may extend over the full length of the front-back direction of a 1st absorber. Thus, if a sealing part and an absorption area | region are provided, a diffusion prevention wall will be suitably formed over the whole front-back direction of a 1st absorber, and it will become easy to prevent side leakage, such as urine.

  Three or more sealing portions may be provided side by side in the width direction on the left first absorbent body and the right first absorbent body, respectively. In this case, the first absorber is provided with a sealing portion so as to divide the absorption region. As a result, urine or the like diffuses on the first absorber in the front-rear direction through the sealing portion. It becomes easy and urine etc. are easily absorbed by the 1st absorber. In addition, more of the water-absorbing resin disposed in the first absorbent body can easily contribute to absorption of urine and the like, and the first absorbent body's absorbability can be enhanced.

  It is preferable that the sealing portion maintains the bonding between the sheet members even when the first absorber absorbs water. By forming the sealing portion in this manner, the absorption region swells in the vertical direction as the first absorbent body absorbs urine and the like, and the diffusion prevention wall is more easily formed. In order to make it easy to maintain the bonding between the sheet members at the sealing portion, the sheet members are made of rubber adhesive (for example, natural rubber, butyl rubber, polyisoprene, etc.) or styrene elastomer (for example, styrene- Isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butadiene-styrene block copolymer (SEBS), styrene-ethylene-propylene-styrene block copolymer (SEPS) or the like), heat sealing (thermal fusion), or ultrasonic bonding is preferable.

  In the first absorbent body, the water absorbent resin is preferably fixed to the sheet member with an adhesive. That is, it is preferable that an adhesive is applied to the sheet member to provide an adhesive layer, and the water absorbent resin is fixed to the sheet member with the adhesive layer. The adhesive layer may be provided on at least one of the upper sheet member and the lower sheet member, but preferably, the adhesive layer is provided on both the upper sheet member and the lower sheet member. It is sufficient that at least a part of the water absorbent resin is fixed to the adhesive layer. For example, the water absorbent resin in contact with the adhesive layer may be fixed to the adhesive layer. If the water absorbent resin is fixed to the sheet member by the adhesive layer, the water absorbent resin is difficult to move between the sheet members, and the diffusion preventing wall is easily formed by the first absorbent body.

  It is preferable that the adhesive layer does not inhibit water absorption or swelling by the water absorbent resin while fixing the water absorbent resin. From this point, the adhesive layer is preferably provided in an intermittent pattern. For example, the adhesive layer is preferably formed by applying the adhesive in a net shape, a stripe shape, or a dotted shape. When the adhesive layer is formed in a net shape, the adhesive may be applied by a curtain spray method, a spiral coating method, an omega coating method, or the like.

  As the adhesive used for the adhesive layer, an adhesive that can be used to form the sealing portion as described above can be used. Moreover, the sealing part may be formed by the adhesive layer. In this case, the sheet members are joined together by the adhesive layer, thereby forming a sealing portion.

  The water-absorbing resin disposed in the first absorbent body preferably has a water absorption rate by vortex method of 20 seconds or less, more preferably 15 seconds or less, and even more preferably 10 seconds or less. If the water absorbent resin having a high water absorption speed is arranged on the first absorbent body, the water absorbent resin of the first absorbent body swells when urine or the like comes into contact with the first absorbent body, thereby preventing diffusion. Walls are quickly formed. As a result, in the absorbent article, a high diffusion prevention wall is easily formed from the first excretion, and side leakage such as urine is less likely to occur. The lower limit of the water absorption rate of the water absorbent resin arranged in the first absorber is not particularly limited, but the water absorption rate by the vortex method of the water absorbent resin arranged in the first absorber may be, for example, 1 second or more. More preferably 2 seconds or more.

  On the other hand, the water absorbent resin disposed on the second absorbent body (specifically, the water absorbent resin disposed on the molded body of the second absorbent body) absorbs more water than the water absorbent resin disposed on the first absorbent body. It is preferable that the speed is low. For example, the water-absorbing resin disposed in the second absorber preferably has a water absorption rate by vortex method of 40 seconds or more, more preferably 60 seconds or more, more preferably 90 seconds or more, and preferably 300 seconds or less, 240 seconds. The following is more preferable. If the water absorbent resin arranged in the second absorbent body has such a water absorption rate, the diffusibility of urine and the like in the second absorbent body is enhanced, and the absorbent capacity of the second absorbent body is utilized over a wide range. Become so.

  The water absorption rate of the water absorbent resin by the vortex method is measured according to JIS K 7224 (1996 edition). Specifically, the water absorption speed is obtained as follows. A 100 mL glass beaker with 50 mL of physiological saline (0.9 wt% sodium chloride water) and a magnetic stirrer chip (center diameter 8 mm, both ends diameter 7 mm, length 30 mm, surface coated with fluororesin ) And the beaker is placed on a magnetic stirrer (HPS-100 manufactured by ASONE). The rotational speed of the magnetic stirrer is adjusted to 600 ± 60 rpm, and the physiological saline is stirred. Add 2.0 g of the water-absorbing resin into the liquid at the center of the vortex of the saline solution being stirred, and start counting when the water-absorbing resin has been introduced into the beaker. Stop the timing at the moment when it breaks (when the vortex disappears and the liquid surface becomes flat), and record the time (in seconds) as the water absorption rate. The measurement is performed 5 times (n = 5), the values at each of the upper and lower points are deleted, and the average value of the remaining three points is taken as the measured value. These measurements are performed at 23 ± 2 ° C. and a relative humidity of 50 ± 5%, and are measured after storing the water absorbent resin in the same environment for 24 hours or more before the measurement.

  The water-absorbing resin is removed from the absorbent article as follows. When taking out water absorbing resin from a 1st absorber, the water absorbing resin distribute | arranged between sheet members is taken out by isolate | separating the sheet member which has arranged water absorbing resin in between. When taking out water absorbing resin from a 2nd absorber, water absorbing resin is taken out by isolate | separating the mixture of water absorbing resin and pulp fiber into water absorbing resin and pulp fiber using a sieve.

  As a water-absorbing resin having a water absorption rate of 20 seconds or less by vortex method, for example, Aqua Keep (registered trademark) 10SH-PF manufactured by Sumitomo Seika Co., Ltd. can be used. As the water-absorbing resin having a water absorption rate of 40 seconds or more by the vortex method, a water-absorbing resin generally used for absorbent articles can be used.

When a water absorbent resin having a water absorption speed of 20 seconds or less by the vortex method is disposed on the first absorbent body, amount, 50 g / ^{m 2} or more preferably, 100 g / ^{m 2} or more, and also preferably from 200 g / ^{m 2} or less, more preferably 180 g / ^{m 2} or less. If the water absorption resin having a water absorption rate of 20 seconds or less by the vortex method is arranged in the absorption region in an amount of 50 g / m ² or more, the first absorber absorbs urine and the like to prevent high diffusion. Walls are easily formed. On the other hand, even if the amount of the water-absorbing resin having a water absorption rate of 20 seconds or less by the vortex method is more than 200 g / m ² , the water-absorbing resin arranged in the absorption region sufficiently contributes to absorption of urine and the like. The effect of increasing the height of the diffusion prevention wall may be saturated. Therefore, it is preferable that a water-absorbing resin having a water absorption rate of 20 seconds or less by the vortex method is arranged in the absorption region in an amount of 200 g / m ² or less.

  In order for the first absorbent body to absorb urine and the like to form a higher diffusion prevention wall, it is preferable that two or more first absorbent bodies are provided overlapping each other. By providing two or more first absorbent bodies, more parts of the water absorbent resin can absorb urine or the like than when the same amount of the water absorbent resin is disposed on one first absorbent body. As a result, it becomes easier to form a diffusion prevention wall having a higher height on the upper surface of the absorbent laminate.

  The absorbent laminate may be provided with an absorbent body (third absorbent body) other than the first absorbent body and the second absorbent body. However, in this case, it is preferable that the third absorber is provided below the second absorber. The third absorbent body may be, for example, an absorbent body having a water-absorbing resin between sheet members so as not to have pulp fibers, or may include a water-absorbing resin and pulp fibers. Good.

  Next, the structural example of the absorbent article of this invention is demonstrated with reference to drawings. 1-4, the structural example of the absorbent article of this invention was shown. FIG. 1 shows a urine pad as an example of an absorbent article, and shows a plan view of the absorbent article as seen from the top sheet side. FIG. 2 is a cross-sectional view taken along the line II-II of the absorbent article shown in FIG. FIG. 3 is a plan view of the absorbent laminate provided in the absorbent article of FIG. 1 as viewed from the top sheet side. 4 represents an IV-IV sectional view of the absorbent laminate shown in FIG. In the drawings, arrows x, y, and z represent the width direction, the front-rear direction, and the vertical (thickness) direction of the absorbent article, respectively. 1 and 3, the upper side of the figure corresponds to the front side of the absorbent article, and the lower side of the figure corresponds to the rear side of the absorbent article. The present invention is not limited to the embodiments shown in the drawings.

  The absorbent article 1 has a top sheet 2, a back sheet 3, and an absorbent laminate 10 provided therebetween. The top sheet 2 is disposed so as to face the wearer's skin, and allows excretion such as urine to pass through. The excrement that has passed through the top sheet 2 is accommodated by the absorbent laminate 10. The back sheet 3 prevents excrement from leaking outside.

  The absorbent article 1 is provided with rising flaps 5 extending in the front-rear direction y on both sides of the top sheet 2 in the width direction x. In FIG. 1 and FIG. 2, the side seat 4 extending in the front-rear direction y is joined to both sides in the width direction x of the top sheet 2, and the standing elasticity provided at the inner end of the side seat 4 in the width direction x. The inner end of the side seat 4 rises toward the wearer's skin due to the contraction force of the member 7, thereby forming the rising flap 5. The rising flap 5 has a base 6 that is a starting point for rising. The rising flap 5 prevents lateral leakage of urine or the like in the width direction x. In addition, the rising flap 5 may be joined to the top sheet 2 at the inner surface of the end portion in the front-rear direction y, whereby the rising flap 5 can be easily raised.

  The absorptive laminated body 10 has the 1st absorber 11 and the 2nd absorber 21 from the top sheet 2 side (refer FIG. 3 and FIG. 4). The first absorbent body 11 includes a left first absorbent body 11A and a right first absorbent body 11B. The left first absorbent body 11A and the right first absorbent body 11B are spaced apart in the width direction x. The first absorbent body 11 includes a plurality of sheet members 12, is configured so as to have a water absorbent resin 13 between the sheet members 12 and no pulp fibers, and is wider than the base 6 of the rising flap 5 in the width direction x. It is provided inward. 3 and 4, the positional relationship where the base portion 6 of the rising flap 5 exists is indicated by a one-dot chain line. On the other hand, the second absorbent body 21 has a molded body 22 containing a water-absorbing resin and pulp fibers, and is provided so as to extend outward in the width direction x from the base portion 6 of the rising flap 5.

  By forming the absorbent article 1 in this way, the first absorbent body 11 functions as a diffusion prevention wall for urine and the like, and side leakage such as urine is less likely to occur. That is, when the first absorbent body 11 absorbs urine or the like, the water absorbent resin 13 contained in the first absorbent body 11 swells and the first absorbent body 11 swells in the vertical direction z. A diffusion preventing wall is formed by the body 11A and the right first absorbent body 11B, and urine or the like is easily absorbed by the second absorbent body 21 without causing side leakage. Further, even if urine etc. spreads outward in the width direction x beyond the left first absorbent body 11A and the right first absorbent body 11B, urine etc. is formed between the first absorbent body 11 and the base 6 of the rising flap 5. Since it moves to the 2nd absorber 21 through the clearance gap between them and is absorbed, a side leak is blocked in two steps.

  As shown in FIGS. 3 and 4, the left first absorbent body 11 </ b> A and the right first absorbent body 11 </ b> B include a sealing portion 15 in which sheet members 12 are joined to each other on both sides in the width direction x, and a sealing portion 15. The water-absorbing resin 13 is disposed on the non-sealing portion 16. Specifically, in the first absorbent body 11, an adhesive is applied to the sheet member 12 to form an adhesive layer 14, and the water absorbent resin 13 is fixed to the sheet member 12 by the adhesive layer 14. The sealing portion 15 is formed at a portion where the sheet members 12 are joined to each other by the adhesive layer 14, and the non-sealing portion 16 is formed at a portion where the sheet members 12 are not joined together. The non-sealing portion 16 is provided with a water absorbent resin 13 to form an absorption region 17. By forming the sealing portion 15 and the absorption region 17 in the left first absorbent body 11A and the right first absorbent body 11B, the left first absorbent body 11A and the right first absorbent body 11B absorb urine and the like. By swelling in the vertical direction, the diffusion preventing wall by the first absorber 11 is more easily formed.

  The molded body 22 of the second absorbent body 21 is provided with a groove 25 extending in the front-rear direction y facing the space 18 where the left first absorbent body 11A and the right first absorbent body 11B are separated. Specifically, the molded body 22 includes an upper molded body 23 and a lower molded body 24, an opening 26 extending in the front-rear direction y is provided in the upper molded body 23, and the lower molded body 24 is an opening of the upper molded body 23. 26, the groove 25 extending in the front-rear direction y is formed in the molded body 22. Thus, by forming the groove | channel 25 in the 2nd absorber 21, the urine etc. which were excreted from the wearer become easy to diffuse the 2nd absorber 21 in the front-back direction y, and urine etc. become the 2nd absorber 21. Will be absorbed quickly. An opening penetrating the molded body 22 in the vertical direction z may be provided instead of the groove.

  As shown in FIGS. 3 and 4, the upper molded body 23 is preferably formed longer in the front-rear direction y and the width direction x than the lower molded body 24. By forming the molded body 22 in this way, the ability to retain urine or the like in the vicinity of the groove 25 of the molded body 22 is increased, and the absorption capacity of the second absorbent body 21 is efficiently exhibited. Further, since the upper molded body 23 is formed longer in the front-rear direction y and the width direction x than the lower molded body 24, the wearer feels a sense of discomfort due to the difference in level between the upper molded body 23 and the lower molded body 24. It becomes difficult to remember and the feeling of wearing the absorbent article 1 is improved.

  The water absorbent resin 13 disposed in the first absorbent body 11 preferably has a water absorption speed of 20 seconds or less by the vortex method. If the first absorbent body 11 is provided with such a water absorbent resin having a high water absorption rate, the first absorbent body 11 comes into contact with urine or the like, so that the water absorbent resin 13 of the first absorbent body 11 quickly swells. Thus, the diffusion preventing wall is quickly formed by the first absorber 11. On the other hand, the water-absorbing resin disposed in the second absorbent body 21 preferably has a water absorption speed of 40 seconds or more by the vortex method from the viewpoint of improving the diffusibility in the second absorbent body 21.

1: Absorbent article 2: Top sheet 3: Back sheet 5: Standing flap 6: Base 10: Absorbent laminate 11: First absorbent body, 11A: Left first absorbent body, 11B: Right first absorbent body 12: Sheet member 13: Water absorbent resin 15: Sealing portion 16: Non-sealing portion 18: Space 21: Second absorbent body 22: Molded body 25: Groove

Claims (7)

An absorbent article having a width direction and a front-rear direction, having a top sheet, a back sheet, and an absorbent laminate provided therebetween,
On both sides of the top sheet in the width direction, rising flaps extending in the front-rear direction are provided,
The absorbent laminate has a first absorbent body and a second absorbent body from the topsheet side,
The first absorbent body is composed of a left first absorbent body and a right first absorbent body, and the left first absorbent body and the right first absorbent body are spaced apart in the width direction,
The left side first absorbent body and the right side first absorbent body include a plurality of layers of sheet members, are configured to have a water absorbent resin between the sheet members and have no pulp fibers, and a starting point of rising of the rising flap It is provided inward in the width direction than the base that becomes,
The said 2nd absorber contains a water absorbing resin and a pulp fiber, and is provided so that it may extend outward in the width direction rather than the base of the said rising flap.   The second absorbent body has a groove or opening extending in the front-rear direction facing a space where the left first absorbent body and the right first absorbent body are spaced apart from a molded body containing a water absorbent resin and pulp fibers. The absorbent article according to claim 1 in which is formed.   The absorbent article according to claim 2, wherein the left first absorbent body and the right first absorbent body are provided 10 mm or more and 35 mm or less apart in the width direction from a groove or opening provided in the second absorbent body. .   The left first absorbent body and the right first absorbent body have a sealing part in which the sheet members are joined to each other in the width direction and a non-sealing part formed between the sealing parts. The absorptive article according to any one of claims 1 to 3 with which water absorption resin is arranged at said non-sealing part.   The absorbent article according to any one of claims 1 to 4, wherein the water-absorbent resin disposed in the first absorbent body has a water absorption rate of 20 seconds or less by a vortex method.   The absorbent article according to claim 5, wherein the water-absorbent resin disposed in the second absorbent body has a water absorption rate by a vortex method of 40 seconds or more.   The left first absorbent body and the right first absorbent body are provided with outer edges in the width direction that are spaced 15 mm or more and 50 mm or less inward from the base of the rising flap. The absorbent article as described in any one.