JP2017051349A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article, even when repetitively receiving urine and the like from a wearer, capable of retaining a high absorption performance by securing diffusivity of the urine and the like.SOLUTION: An absorbent article 1 has a width direction x and a longitudinal direction y, and includes a top sheet 2, a back sheet 3, and an absorbent core 4 provided therebetween. The absorbent core 4 includes an opening (or a recessed part ) 5 extending in the longitudinal direction, formed at a central part in the width direction X. The absorbent article 1 further includes central elastic members 6 extending in the longitudinal direction y along both-side outer edges in the width direction x of the opening (or the recessed part) 5, with their overlapped with the absorbent core 4.SELECTED DRAWING: Figure 1

Description

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

  Conventionally, an absorptive article which has an absorptive core in which an opening and a crevice were formed is known (for example, patent documents 1-4).

Japanese Utility Model Publication No. 63-093921 JP 2003-210507 A JP 2004-041311 A JP 2007-202575 A

  When an opening or a recess is provided in the absorbent core, the opening or the recess functions as a diffusion path for urine or the like, and the diffusibility of urine or the like in the front-rear direction can be enhanced. Further, when the absorbent article is worn, the absorbent core is easily formed in a shape that is depressed in the cross section in the width direction between the wearer's crotches, and the urine and the like excreted from the wearer are easily received. However, if an opening or a recess is formed in the absorbent core, urine excreted from the wearer collects in the opening or the recess, so that the urine is particularly absorbed around the opening or the recess and the absorbed urine, etc. It becomes easy to dent greatly downward by weight. Therefore, as the absorbent core absorbs urine and the like, the diffusibility is lowered and the absorption performance is lowered.

  The present invention has been made in view of the above circumstances, and its purpose is to absorb urine from a wearer repeatedly, ensuring diffusibility of urine and the like and maintaining high absorption performance. To provide an article.

  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 core provided therebetween. In the absorbent core, an opening or a recess extending in the front-rear direction is formed in the center in the width direction, and the absorbent article is formed along the outer edges on both sides in the width direction of the opening or the recess. It is characterized in that a central elastic member that overlaps and extends in the front-rear direction is provided. In the absorbent article of the present invention, an opening or a recess extending in the front-rear direction is formed in the center of the absorbent core in the width direction. Therefore, when the absorbent article is worn, it is depressed in the width direction between the wearer's crotch The urine etc. formed in the shape and excreted from the wearer can be suitably received. And even if urine etc. are absorbed in an absorptive core by providing a central elastic member which overlaps with an absorptive core and extends in the front-back direction along the outer edge of both sides of the width direction of an opening or a crevice, an absorptive core However, it becomes difficult to dent greatly between the wearer's crotch, and diffusibility of urine or the like can be secured. Therefore, even if the absorbent article repeatedly receives urine or the like from the wearer, the absorption performance can be maintained high.

  The central elastic member is preferably provided in a region within 20 mm from the outer edge in the width direction of the opening or the recess. Since the absorbent core absorbs urine and the like particularly around the opening or recess, providing the central elastic member in the vicinity of the outer edge in the width direction of the opening or recess makes it difficult for the absorbent core to be greatly recessed in the cross section in the width direction. Become.

  The central elastic member is preferably provided closer to the skin surface than the absorbent core. By providing the central elastic member in this way, the outer edge in the width direction of the opening or the concave portion is easily clearly formed by the central elastic member, and the function of the opening or the concave portion as a diffusion path can be enhanced. As a result, the diffusibility of urine and the like in the front-rear direction can be enhanced.

  It is preferable that the central elastic member extends forward from the front end of the opening or recess and / or extends rearward from the rear end of the opening or recess. If the central elastic member is provided in this way, urine or the like is easily diffused in the front-rear direction through the opening or the recess. In addition, the absorbent core is less likely to be greatly recessed at the opening or the recessed portion over a wide range in the front-rear direction, and diffusibility in the width direction of urine or the like is easily ensured.

  It is preferable that the absorbent article further includes a side elastic member provided so that at least a part thereof is located outside the outer edge in the width direction of the absorbent core. By providing the side elastic member, when the absorbent article is worn, both end portions in the width direction of the absorbent core are likely to hit the wearer's skin, and side leakage such as urine is easily prevented.

  The absorbent core has a front part, a rear part, and an intermediate part between them in the front-rear direction, the front part and the rear part are formed wider than the intermediate part, and the side elastic member is located in front of the absorbent core. It is preferable that it is provided so that it may overlap with the rear portion and the intermediate portion of the absorbent core. Thus, by providing a side elastic member, it forms so that the front part and back part of an absorptive core may approach, and the fit property to the wearer's crotch of an absorptive core can be improved.

  The side elastic member is preferably provided with a contraction force stronger than that of the central elastic member. If the side elastic member and the central elastic member are provided in this way, when the absorbent article is worn, the absorbent core is arranged closer to the wearer's skin at both ends than the central portion in the width direction, or Both end portions are more strongly applied to the wearer's skin than the central portion in the width direction, and the urine and the like from the wearer are easily received, and side leakage of urine and the like is less likely to occur.

  The side elastic member is preferably provided with a shorter length in the front-rear direction than the central elastic member. If the side elastic member is provided in this manner, both end portions in the width direction are less likely to be distorted at the front portion and the rear portion of the absorbent core. Therefore, when the absorbent article is worn, the absorbent core can be easily applied to the wearer's abdomen and back in a flat state, and leakage from the abdomen and back such as urine can be easily prevented.

  The absorbent article is provided with rising flaps on both sides in the width direction of the top sheet, and the side elastic member is provided on the inner side in the width direction with respect to the base that becomes the starting point of the rising flap, and absorbs more than the base. It is preferable to be provided near the sex core. If the side elastic member is provided in this manner, the rising of the rising flap is less likely to be disturbed by the side elastic member, and the rising flap easily rises straight toward the wearer's skin. Therefore, combined with the fact that both ends of the absorbent core in the width direction are likely to hit the wearer's skin due to the contraction force of the side elastic member, the effect of preventing side leakage of urine and the like is further enhanced.

  In the absorbent article of the present invention, an opening or a recess extending in the front-rear direction is formed in the center of the absorbent core in the width direction. Therefore, when the absorbent article is worn, it is depressed in the width direction between the wearer's crotch The urine etc. formed in the shape and excreted from the wearer can be suitably received. And even if urine etc. are absorbed in an absorptive core by providing a central elastic member which overlaps with an absorptive core and extends in the front-back direction along the outer edge of both sides of the width direction of an opening or a crevice, an absorptive core However, it becomes difficult to dent greatly between the wearer's crotch, and diffusibility of urine or the like can be secured. Therefore, even if the absorbent article repeatedly receives urine and the like from the wearer, the absorption performance can be maintained high.

An example of the absorbent article of this invention is represented, and the top view which looked at the absorbent article from the skin surface side is represented. II-II sectional drawing of the absorbent article shown in FIG. 1 is represented. The other example of the absorbent article of this invention is represented, and the top view which looked at the absorbent article from the skin surface side is represented. The IV-IV sectional view of the absorptive article shown in Drawing 3 is expressed.

  The absorbent article of the present invention has a top sheet, a back sheet, and an absorbent core provided therebetween, and has a width direction and a front-rear direction. Examples of the absorbent article of the present invention include disposable diapers, urine pads (including incontinence pads), sanitary products, and the like.

  In this invention, the front-back direction of an absorbent article means the direction extended in the front-back direction of a wearer's crotch when a wearer wears an absorbent article. The width direction of the absorbent article 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 skin surface side of the absorbent article means the side facing the wearer's skin when the absorbent article is worn, and the outer surface side of the absorbent article wears the absorbent article. It means the opposite side of the wearer.

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

  When the absorbent article is a disposable diaper, the absorbent article includes, for example, a front side portion, a rear side portion, and a crotch portion that is located between them and includes an absorbent core. As a disposable diaper, for example, on the skin side of an exterior member composed of a front side portion, a rear side portion, and a crotch portion located between them, an absorptive core is disposed between the top sheet and the back sheet A main body 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 core was distribute | arranged between the top sheet | seat and the back sheet | seat may form a front side part, a rear side part, and the crotch part located among these. In addition, a front side part is corresponded to the part which hits a wearer's belly side when wearing a disposable diaper, and a back side part is equivalent to the part which hits a wearer's back side when wearing a disposable diaper. A crotch part is located between a front side part and a rear side part, and is equivalent to the part applied to a wearer's crotch.

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

  A top sheet is a sheet | seat provided in the skin surface side rather than an absorptive core, and it is preferable that it is liquid-permeable. The top sheet is preferably provided so as to face the wearer when the absorbent article is worn. 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. As the top sheet, a woven fabric, a knitted fabric, a perforated plastic film, or the like may be used.

  The back sheet is a sheet provided on the outer surface side of the absorbent core, 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 exterior member may be liquid permeable or liquid impermeable, and a sheet material that can be used for a top sheet or a back sheet can be used. The exterior member is preferably formed by laminating an outer sheet on an inner sheet, and more preferably formed by laminating a liquid-impermeable outer sheet on a 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 core is not particularly limited as long as it includes an absorbent material that can absorb excrement such as urine. As an absorptive core, the molded object which shape | molded the absorptive material in the predetermined shape can be used, for example. The absorbent core may be covered with a sheet member such as a paper sheet (for example, tissue paper or thin paper) or a liquid-permeable nonwoven fabric. Examples of the absorbent material contained in the absorbent core include hydrophilic fibers such as cellulose fibers (for example, pulverized pulp fibers), polyacrylic acid-based materials, polyaspartic acid-based materials, cellulose-based materials, starch-acrylonitrile-based materials, and the like. Water-absorbing resin etc. are mentioned. The absorbent material includes heat-fusible fibers such as polyolefin fibers (eg, polyethylene fibers, polypropylene fibers), polyester fibers (eg, PET fibers), and polyamide fibers (eg, nylon fibers). Also good. These heat-fusible fibers may be hydrophilized with a surfactant or the like in order to increase the affinity with urine or the like.

  The absorbent material preferably contains at least hydrophilic fibers, and more preferably contains pulp fibers, from the viewpoint of increasing the absorption rate of urine and the like and improving the shape retention of the absorbent core. Moreover, it is preferable that an absorptive material contains a water absorbing resin from the point which raises absorption capacity. More preferably, an absorptive core contains a hydrophilic fiber and a water absorbing resin as an absorptive material. In this case, it is preferable to use, for example, a mixture of hydrophilic fibers mixed or dispersed in an aggregate of hydrophilic fibers.

  The shape (planar shape) of the absorbent core is not particularly limited. The shape of the absorbent core may be appropriately determined according to the application, and examples thereof include a substantially rectangular shape, an hourglass shape, a gourd shape, and a battledore shape.

  The absorbent core may be formed by laminating a plurality of layers. For example, the absorbent core may have an upper absorbent layer provided on the top sheet side and a lower absorbent layer provided on the back sheet side. The upper absorbent layer and the lower absorbent layer are not particularly limited as long as they contain an absorbent material, and the shape (planar shape) thereof is not particularly limited as well, as described above for the absorbent core.

  The absorbent core has an opening or a recess extending in the front-rear direction at the center in the width direction. Specifically, the opening or the concave portion includes a center line in the width direction of the absorbent core, and is formed to extend in the front-rear direction along the center line. The opening or recess extending in the front-rear direction means an opening or recess having a shape longer in the front-rear direction than in the width direction. Thus, if the opening or recessed part is formed in the absorptive core, the absorptive core will be formed in the shape which became depressed in the cross section of the width direction, and it will become easy to receive urine etc. excreted from the wearer suitably. Moreover, the opening or recess of the absorbent core functions as a diffusion path for urine or the like, and urine or the like is easily diffused in the front-rear direction along the opening or the recess. As a result, urine and the like are quickly absorbed by the absorbent core, and the absorbent core easily contributes to absorption of urine and the like over a wide range.

  The opening is provided through the absorbent core in the thickness direction. The recess is formed, for example, by partially compressing the absorbent core or by partially reducing the basis weight of the absorbent core. In this case, the compressed portion of the absorbent core or the portion with reduced basis weight is formed as a recess. In addition, it is preferable that the recessed part of an absorptive core is formed by partially reducing the fabric weight of an absorptive core, and this makes it easy to form an absorptive core in the shape dented by the recessed part. In this case, the recess is preferably formed so that the basis weight is 60% by mass or less (more preferably 50% by mass or less, and further preferably 40% by mass or less) than the part other than the recess. .

  When a recessed part is formed in an absorptive core, a recessed part may be formed in the surface by the side of the top sheet of an absorptive core, or may be formed in the surface by the side of a back sheet. When the absorbent core is composed of an upper absorbent layer and a lower absorbent layer, an opening is formed in the upper absorbent layer, and the lower absorbent layer is provided so as to cover the opening, whereby the absorbent core has a recess. Conversely, an opening may be formed in the lower absorbent layer, and the upper absorbent layer may be provided so as to cover the opening, whereby a recess may be formed in the absorbent core. Preferably, the recess is formed on the surface of the absorbent core on the top sheet side.

  As will be described later, when the rising flaps are provided on both sides in the width direction of the top sheet, the opening or the concave portion may be provided inward in the width direction from the base portion of the rising flap (portion that is the starting point of the rising). preferable. Moreover, it is preferable that an opening or a recessed part is provided so that it may not overlap with the base part of a rising flap.

  The absorbent core may be provided with only one opening or recess, or may be provided with two or more, but preferably, only one opening or recess is provided in the absorbent core. That is, it is preferable that the absorbent core is provided with only one opening or recess, and the opening or recess is provided at the center in the width direction so as to extend in the front-rear direction. By forming the absorbent core in this manner, the absorbent core is easily formed in a shape that is recessed in the cross section in the width direction while wearing the absorbent article. As a result, the urine etc. excreted from the wearer can be suitably received, and the diffusibility of the urine etc. in the front-rear direction can be enhanced.

  The width in the width direction of the opening or the recess is preferably 5% or more, more preferably 8% or more, and further preferably 10% or more of the length in the width direction of the narrowest part of the absorbent core. Moreover, 30% or less is preferable, 25% or less is more preferable, and 20% or less is further more preferable. The narrowest part of the absorbent core is the narrowest part in the width direction at the intermediate part when the absorbent core is divided into three parts in the front-rear direction, the front part, the rear part, and the intermediate part therebetween. Means the part that was made. When the absorptive core is substantially rectangular, the absorptive core is the narrowest part in the front-rear direction. Thus, if an opening or a recessed part is provided, the diffusibility to the front-back direction of urine etc. can be improved, ensuring the absorption capacity of an absorptive core. The width of the opening or the recess is preferably 5 mm or more, more preferably 8 mm or more, and preferably 35 mm or less, more preferably 25 mm or less.

  The length of the opening or the recess is preferably 40% or more of the length of the absorbent core in the front-rear direction, more preferably 50% or more, further preferably 60% or more, and 90% or less. Preferably, 85% or less is more preferable, and 80% or less is more preferable. In addition, it is preferable that the front side end of an opening or a recessed part is located back rather than the front side end of an absorptive core, and the rear side end of an opening or a recessed part is located ahead of the back side end of an absorptive core. If the opening or the recess is provided in this way, the diffusibility of urine or the like in the front-rear direction can be enhanced, and urine or the like diffused in the front-rear direction through the opening or the recess overflows beyond the front and rear ends of the absorbent core. It becomes difficult to put out.

  The opening or the recess is a region where the front end of the opening or the recess is in a region of 5% to 30% when the front end is 0% and the rear end is 100% relative to the front-rear direction of the absorbent core. It is preferable that the rear end of the recess is in a region of 70% to 95%. Note that the length and relative position described above are based on the state in which the elastic member provided in the absorbent article is completely extended (that is, the elastic member is removed or the elastic member is contracted by cutting the elastic member finely. Measure in a non-expressed state). For various other lengths and positions described later, values measured under the same conditions are used.

  When the absorbent core is formed in an hourglass shape, the opening or the recess is preferably provided at least in the hourglass-shaped constricted portion. That is, the absorbent core has a front part, a rear part, and an intermediate part between them in the front-rear direction, the front part and the rear part of the absorbent core are formed wider than the intermediate part, and the opening or recess is at least intermediate. It is preferable to be provided in the part. The opening or the recess may further extend to the front part and / or the rear part.

  By the way, when an opening or a concave portion is provided in the absorbent core as described above, urine excreted from the wearer is formed between the wearer's crotch by forming the absorbent core in a shape that is depressed in the cross section in the width direction. In this case, the absorbent core tends to gather particularly near the center in the width direction. As a result, in the crotch of the wearer, the absorbent core is likely to be greatly recessed downward in the widthwise center due to the absorbed weight of urine and the like. Therefore, as the absorbent core absorbs urine and the like, the diffusibility in the width direction decreases. Moreover, as a result, an absorptive core becomes easy to dent in a wearer's crotch shape, and the diffusibility to the front-back direction also falls.

  Therefore, the absorbent article of the present invention is provided with an elastic member extending in the front-rear direction so as to overlap the absorbent core along the outer edges on both sides in the width direction of the opening or the recess. In the present invention, the elastic member is referred to as a “central elastic member”. By providing the central elastic member in the absorbent article, even if the absorbent core absorbs urine etc., the central part in the width direction of the absorbent core will not be greatly recessed between the wearer's crotch, urine etc. in the absorbent core Can be ensured. Therefore, even if the absorbent article repeatedly receives urine or the like from the wearer, it is possible to maintain high absorption performance of the absorbent core. In addition, the central elastic member is not provided in the opening or the recessed portion, but is provided so as to overlap the absorbent core along the outer edges on both sides in the width direction of the opening or the recessed portion, thereby functioning as a diffusion path of the opening or the recessed portion. It is maintained and diffusibility of urine and the like in the front-rear direction is also ensured.

  The central elastic member is preferably provided in the vicinity of the outer edge in the width direction of the opening or the recess. Specifically, the central elastic member is preferably provided in a region within 20 mm from the outer edge in the width direction of the opening or recess, more preferably provided in a region within 15 mm, and provided in a region within 10 mm. Is more preferable. Since the absorbent core absorbs urine and the like particularly around the opening or recess, providing the central elastic member in the vicinity of the outer edge in the width direction of the opening or recess makes it difficult for the absorbent core to be greatly recessed in the cross section in the width direction. Become. The central elastic member is provided in an area of at least 40% to 60% with respect to the front-rear direction when the front end is 0% and the rear end is 100% relative to the front-rear direction of the absorbent core. It is preferred that

  The thickness of the absorbent article is as long as the central elastic member is provided so as to overlap the absorbent core and extend in the front-rear direction along the outer edges on both sides in the width direction of the openings or recesses in a state where the absorbent article is viewed in plan view. The position with respect to the direction is not particularly limited. The central elastic member may be provided on the skin side of the absorbent core, or may be provided on the outer surface side of the absorbent core, and may be provided in the absorbent core (for example, the upper absorbent layer and the lower absorbent layer). Between the two). The central elastic member may be attached to the absorbent core, or may be attached to a member other than the absorbent core (for example, a top sheet or a back sheet). The central elastic member may be attached by a known joining means such as an adhesive. In addition, when a center elastic member is attached to members other than an absorptive core, it is preferable that a center elastic member overlaps with an absorptive core and is indirectly fixed to an absorptive core.

  The central elastic member is preferably provided on the skin surface side of the absorbent core. By providing the central elastic member in this way, the outer edge in the width direction of the opening or the concave portion is easily clearly formed by the central elastic member, and the function of the opening or the concave portion as a diffusion path can be enhanced. As a result, the diffusibility of urine and the like in the front-rear direction can be enhanced. In this case, the central elastic member is a sheet member provided on the skin surface side of the absorbent core (for example, the top sheet, any sheet member provided between the top sheet and the absorbent core, the skin than the top sheet). It is preferably attached to an arbitrary sheet member or the like provided on the surface side.

  The number of central elastic members is not particularly limited. However, if an excessively large number is provided, a large number of wrinkles are formed on the absorbent core, and the wearing feeling of the absorbent article may be lowered. Therefore, it is preferable to provide three or less central elastic members on one side and the other side in the width direction of the opening or recess, and more preferably two or less. Further, it is preferable that all the central elastic members are provided closer to the outer edge in the width direction of the opening or the recess than the outer edge in the width direction of the absorbent core, more preferably in the width direction of the absorbent core. When the space between the outer edge and the outer edge of the opening or the recess is divided into three equal parts in the width direction, it is provided in a 1/3 region closer to the opening or the recess.

  The central elastic member is preferably provided so as to extend forward from the front end of the opening or recess and / or extend rearward from the rear end of the opening or recess. More preferably, the central elastic member is provided so as to extend forward from the front end of the opening or recess and to extend rearward from the rear end of the opening or recess. By providing the central elastic member in this way, urine or the like is easily diffused in the front-rear direction through the opening or the recess. In addition, the absorbent core is less likely to be greatly recessed at the opening or recess over a wide range in the front-rear direction, and diffusibility in the width direction of urine or the like is easily secured.

  As the central elastic member, an elastic stretch material used for a normal absorbent article such as polyurethane yarn, polyurethane film, natural rubber, or the like can be used. The central elastic member is preferably attached in an expanded state with an adhesive such as 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 same applies to various elastic members described below.

  The absorbent article of the present invention is preferably provided with another elastic member on the outer side than the outer edge in the width direction of the absorbent core. In the present invention, the elastic member is referred to as a “lateral elastic member”. The side elastic member should just be provided so that at least one part may be located outside the outer edge of the width direction of an absorptive core. By providing the side elastic member, when the absorbent article is worn, both end portions in the width direction of the absorbent core are likely to hit the wearer's skin, and side leakage such as urine is easily prevented. In addition, since the side elastic member is provided so that at least a portion thereof does not overlap the absorbent core, the contraction force of the side elastic member is suitably exhibited.

  The side elastic member is preferably provided so as to extend in the front-rear direction. Moreover, it is preferable that a side elastic member is provided in the position which overlaps with a center elastic member with respect to the front-back direction. The number of side elastic members is not particularly limited. For example, it is preferable that one to four side elastic members are provided on both sides in the width direction of the absorbent core. As will be described later, when the absorbent article is provided with a rising flap, it is preferable that the lateral elastic member is provided inward in the width direction with respect to the base that is the starting point of the rising flap.

  The side elastic member is preferably provided so that at least one of the front and rear end portions overlaps with the absorbent core, and more preferably provided so that both the front and rear end portions overlap with the absorbent core. In this case, the absorbent core is preferably formed in an hourglass shape. That is, the absorbent core has a front part, a rear part, and an intermediate part between them in the front-rear direction, the front part and the rear part are formed wider than the intermediate part, and the side elastic member is an absorbent core. It is preferable that it is provided so that it may overlap with the front part and the rear part, and not overlap with the intermediate part of the absorbent core. The side elastic member provided in this way acts so that the front part and back part of an absorptive core may be brought close. Moreover, the contraction force of a side elastic member comes to be exhibited suitably by arrange | positioning so that a side elastic member may not overlap with the intermediate part of an absorptive core. As a result, the fit of the absorbent core to the wearer's crotch is enhanced, and side leakage such as urine is less likely to occur.

  The side elastic member is preferably provided with a shorter length in the front-rear direction than the central elastic member. If the side elastic member is provided in this manner, both end portions in the width direction are less likely to be distorted at the front portion and the rear portion of the absorbent core. Therefore, when the absorbent article is worn, the absorbent core can be easily applied to the wearer's abdomen and back in a flat state, and leakage from the abdomen and back such as urine can be easily prevented. More preferably, the side elastic member and the central elastic member are provided so that the central elastic member extends forward and rearward than the side elastic member.

  The lateral elastic member is provided so as to extend forward of the front end of the opening or recess and / or extend rearward of the rear end of the opening or recess with respect to the opening or recess. It is preferable. More preferably, the side elastic member is provided so as to extend forward from the front end of the opening or recess and to extend rearward from the rear end of the opening or recess. By providing the side elastic member in this way, it becomes easy to prevent side leakage of urine and the like. In other words, in the opening or recess, a gap is formed between the absorbent core and the skin of the wearer, which is likely to cause side leakage, and is located forward of the front end and / or rear of the rear end of the opening or recess. By providing the side elastic member so as to extend, side leakage through the gap between the absorbent core and the wearer's skin is unlikely to occur.

  The side elastic member is preferably provided with a contraction force stronger than that of the central elastic member. If the side elastic member and the central elastic member are provided in this way, when the absorbent article is worn, the absorbent core is disposed closer to the wearer's skin at both ends than the central portion in the width direction. Alternatively, both end portions are more strongly applied to the wearer's skin than the central portion in the width direction, and the urine or the like from the wearer is easily received, and side leakage of urine or the like is less likely to occur.

  The contraction force of each elastic member is measured as follows. That is, the elastic member attached to the absorbent article is stretched to measure the stretch length L of the elastic member in a state where the absorbent article is completely expanded, and then the elastic member is removed from the absorbent article. By measuring the contraction force when extended to the length L, the contraction force of the elastic member is obtained. When a plurality of side elastic members or central elastic members are provided on one side in the width direction of the absorbent core, the contraction force of the plurality of elastic members is obtained.

  The side elastic member is positioned in the thickness direction of the absorbent article as long as at least part of the side elastic member is provided outside the outer edge in the width direction of the absorbent core in a state where the absorbent article is viewed in plan view. There is no particular limitation. When a part of the side elastic member is provided so as to overlap the absorbent core, the side elastic member may be provided on the skin surface side of the absorbent core, and provided on the outer surface side of the absorbent core. Or may be provided in the absorbent core (for example, between the upper absorbent layer and the lower absorbent layer). In addition, when provided so that a part of side elastic member may overlap with an absorptive core, it is preferable that a side elastic member is provided in an outer surface side rather than an absorptive core, and, thereby, the skin surface of an absorptive core The wear on the absorbent article can be improved by suppressing side distortion. In this case, the side elastic member is a sheet member provided on the outer surface side of the absorbent core (for example, a back sheet, an arbitrary sheet member provided between the back sheet and the absorbent core, or an outer surface of the back sheet. It is preferably attached to an arbitrary sheet member or the like provided on the side.

  The absorbent article is preferably provided with rising flaps on both sides in the width direction of the top sheet. Side flaps such as urine are prevented by the rising flap. The rising flap is preferably provided so as to extend in the front-rear direction. 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 on the inner side in the width direction of the side sheet. By providing the side seat and the elastic member in this manner, the inner portion of the side seat in the width direction 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.

  When the absorbent article is provided with a rising flap, the lateral elastic member should be provided inward in the width direction from the base that is the starting point of the rising flap, and closer to the absorbent core than the base. Is preferred. Specifically, it is preferable that the side elastic member is provided inward in the width direction from the base portion of the rising flap, and is provided closer to the absorbent core than the base portion in an intermediate portion of the absorbent core. If the side elastic member is provided in this manner, the rising of the rising flap is less likely to be disturbed by the side elastic member, and the rising flap easily rises straight toward the wearer's skin. Therefore, coupled with the fact that both ends of the absorbent core in the width direction are likely to hit the wearer's skin due to the contraction force of the side elastic member, the effect of preventing side leakage of urine and the like is further enhanced.

  Note that the absorbent article may be provided with a leg-hole elastic member extending in the front-rear direction as another elastic member on the outer side in the width direction than the base of the rising flap. By providing an elastic member around the leg, the fit around the wearer's leg is enhanced, and it is easy to prevent side leakage of urine and the like.

  The absorbent article of the present invention can be used with a separate absorbent article (hereinafter, the separate absorbent article is referred to as “auxiliary absorber”). As described above, the absorbent article of the present invention is not easily recessed in the width direction between the wearer's crotch when wearing the absorbent article, so that the auxiliary absorbent can be stably placed on the absorbent article. Easy to place. Moreover, since it becomes easy to take the shape which the absorbent article was moderately depressed in the width direction, it becomes easy to remove an auxiliary absorber from an absorbent article after use of an auxiliary absorber.

  In the absorbent article, another flap may be provided inward in the width direction of the rising flap described above. In the present invention, the flap is referred to as a “central flap”. It is preferable that a pair of the center flaps are provided between the rising flaps on one side in the width direction and the rising flaps on the other side so as to extend in the front-rear direction and to be inclined outward in the width direction. By providing the central flap on the absorbent article in this way, it is possible to use the auxiliary absorbent body on the absorbent article. In this case, the auxiliary absorber placed on the central flap is lifted so as to approach the wearer's skin, and urine excreted from the wearer can be suitably received by the auxiliary absorber.

  The center flap is formed, for example, by arranging a center sheet on the top sheet, joining the center part in the width direction of the center sheet to the top sheet, and providing elastic members at both ends in the width direction of the center sheet. Can do. Alternatively, the right center sheet and the left center sheet are arranged on both sides in the width direction of the top sheet, the inner portions in the width direction of the right center sheet and the left center sheet are joined to the top sheet, and an elastic member is provided on the outer portion. Can be formed. The central flap may be liquid permeable or liquid impervious, so the center sheet (including the left center sheet and the right center sheet) can be used for top sheets and back sheets. Can be used. The central flap or center sheet is preferably permeable to liquid, so that even if urine or the like received by the auxiliary absorbent overflows from the auxiliary absorbent and moves onto the central flap, the urine or the like remains in the central flap. Or the center sheet can be suitably absorbed by the absorbent core. When a center flap is provided in an absorbent article, the center elastic member demonstrated above may be attached to a center sheet | seat.

  Next, the structural example of the absorbent article of this invention is demonstrated with reference to drawings. In the drawings, an open type (tape type) disposable diaper is shown as an absorbent article. The present invention is not limited to the embodiments shown in the drawings.

  1 and 2 show an example of the absorbent article of the present invention. FIG. 1 shows a plan view of an open-type disposable diaper as an absorbent article as seen from the skin surface side, and FIG. 2 shows a II-II sectional view of the absorbent article shown in FIG. In the drawings of the present application, the arrow x represents the width direction, the arrow y represents the front-rear direction, and the direction perpendicular to the plane formed by the arrows x and y represents the thickness direction z. In FIG. 1, the upper side of the drawing corresponds to the front side of the absorbent article, and the lower side of the drawing corresponds to the rear side of the absorbent article.

  The absorbent article 1 (1A) includes a top sheet 2, a back sheet 3, and an absorbent core 4 provided therebetween. The excrement passing through the top sheet 2 is accommodated by the absorbent core 4. The back sheet 3 is provided on the outer surface side of the absorbent core 4 to prevent excrement from leaking to the outside.

  In the absorbent article 1A, the absorbent core 4 is formed in an hourglass shape. That is, the absorbent core 4 has a front part, a rear part, and an intermediate part between them in the front-rear direction y, and the front part and the rear part are formed wider than the intermediate part.

  A pair of side sheets 10 extending in the front-rear direction y are provided on both sides of the top sheet 2 in the width direction x. The side sheet 10 is joined to the top sheet 2, and an elastic member 9 is provided in the inner part in the width direction x. As for the side seat | sheet 10, the inner side part of the side seat | sheet 10 stands | starts up toward a wearer's skin with the contraction force of the elastic member 9, and, thereby, the standing | starting flap 8 is formed.

  A fastening member 16 is attached to the left and right ends of the rear side portion of the absorbent article 1A in the front-rear direction y. The fastening member 16 is configured by providing a fastener 18 on a base sheet 17. The absorbent article 1A can be mounted by putting it on the wearer's crotch and joining the fastener 18 of the fastening member 16 to the outer side surface of the front side portion of the absorbent article 1A. As the fastener 18, a hook member of a hook, a loop, or a fastener or an adhesive can be employed.

  The absorbent core 4 is formed with an opening 5 extending in the front-rear direction y at the center in the width direction x, and overlaps the absorbent core 4 along the outer edges on both sides of the width direction x of the opening 5 in the front-rear direction y. An extending central elastic member 6 is provided. Since the absorbent article 1A has an opening 5 extending in the front-rear direction y at the center of the absorbent core 4 in the width direction x, the absorbent article 4A is formed in a shape recessed in the width direction x between the wearer's crotch. The urine excreted from the urine can be suitably received. Then, by providing the central elastic member 6 that overlaps the absorbent core 4 and extends in the front-rear direction y along the outer edges on both sides in the width direction x of the opening 5, even if urine or the like is absorbed by the absorbent core 4. In addition, the absorbent core 4 is less likely to be dented between the wearer's crotch, and diffusibility of urine or the like in the absorbent core 4 can be ensured. Therefore, even if the absorbent article 1A receives urine or the like from the wearer a plurality of times, it becomes possible to maintain high absorption performance of urine or the like.

  The central elastic member 6 is preferably provided closer to the skin surface than the absorbent core 4. In the absorbent article 1A, as shown in FIG. 2, the central elastic member 6 is disposed between the top sheet 2 and the absorbent core 4 and attached to the top sheet 2 with an adhesive or the like. By providing the central elastic member 6 in this way, the outer edge in the width direction x of the opening 5 is easily clearly formed by the central elastic member 6, and the diffusibility of urine or the like in the front-rear direction y can be enhanced.

  In the absorbent article 1 </ b> A, the central elastic member 6 extends forward from the front end of the opening 5 and extends rearward from the rear end of the opening 5. By providing the central elastic member 6 in this way, urine and the like are easily diffused in the front-rear direction y through the opening 5. Moreover, the absorptive core 4 becomes difficult to be greatly depressed at the opening 5 over a wide range in the front-rear direction y, and the diffusibility in the width direction x is easily secured.

  In the absorbent article 1 </ b> A, a lateral elastic member 7 is further provided outside the outer edge of the absorbent core 4 in the width direction x. By providing the side elastic member 7, when the absorbent article 1A is worn, both end portions in the width direction x of the absorbent core 4 are likely to hit the wearer's skin, and side leakage such as urine can be easily prevented. The side elastic member 7 is preferably provided with a contraction force stronger than that of the central elastic member 6, whereby the absorbent core 4 has both ends at the wearer's skin rather than the central portion in the width direction x. It is arranged nearby, or both end portions are more strongly applied to the wearer's skin than the central portion in the width direction x, and side leakage such as urine is less likely to occur.

  When the absorbent core 4 is formed in an hourglass shape, that is, when the front part and the rear part of the absorbent core 4 are formed wider than the intermediate part therebetween, the side elastic member 7 is absorbent. It is preferable that the front part and the rear part of the core 4 are provided so as not to overlap the intermediate part. Thus, by providing the side elastic member 7, it forms so that the front part and rear part of the absorptive core 4 may approach, and the fit property to the wearer's crotch of the absorptive core 4 increases.

  The side elastic member 7 is preferably provided with a shorter length in the front-rear direction y than the central elastic member 6. If the side elastic member 7 is provided in this way, both end portions in the width direction x are less likely to be distorted between the front portion and the rear portion of the absorbent core 4. Therefore, when the absorbent article 1A is worn, the absorbent core 4 can be easily applied to the wearer's abdomen and back in a flat state, and leakage from the abdomen and back such as urine can be easily prevented.

  It is preferable that the side elastic member 7 is provided inward in the width direction x with respect to the base 8B that is the starting point of the rising flap 8 and closer to the absorbent core 4 than with the base 8B. If the side elastic member 7 is provided in this way, the rising of the rising flap 8 is not easily disturbed by the side elastic member 7, and the rising flap 8 is easily raised straight toward the wearer's skin. Therefore, combined with the fact that both end portions of the absorbent core 4 in the width direction x easily come into contact with the wearer's skin due to the contraction force of the side elastic members 7, the effect of preventing side leakage of urine and the like is further enhanced.

  The absorbent article 1 </ b> A is further provided with a leg-around elastic member 11 outside the base 8 </ b> B of the rising flap 8 in the width direction x. By providing the leg-around elastic member 11, the fit around the wearer's leg is enhanced, and it is easy to prevent side leakage of urine and the like.

  A waist elastic member 15 extending in the width direction x is provided at the end in the front-rear direction y of the absorbent article 1A. A waist gather along the waist of the wearer is formed by the waist elastic member 15, and leakage of urine and the like from the abdomen and back is prevented.

  Next, another configuration example of the absorbent article of the present invention will be described. FIG. 3 represents a plan view of an open-type disposable diaper as an absorbent article as seen from the skin surface side, and FIG. 4 represents a cross-sectional view taken along the line IV-IV of the absorbent article shown in FIG. In the following description, the description of the same part as the above description is omitted.

  In the absorbent article 1 (1B) shown in FIGS. 3 and 4, a pair of central flaps 12 are provided between the rising flaps 8 provided on both sides of the top sheet 2 in the width direction x. The central flap 12 is formed on one side and the other side in the width direction x so as to tilt outward in the width direction x. In the drawing, a center sheet 14 is arranged on the top sheet 2, the center part of the center sheet 14 in the width direction x is joined to the top sheet 2, and the elastic members 13 are provided at both ends of the center sheet 14 in the width direction x. Thus, the central flap 12 is formed.

  The absorbent article 1B can be suitably used by placing an auxiliary absorbent on the central flap 12. The auxiliary absorber placed on the central flap 12 can be lifted toward the wearer's skin by the central flap 12, and urine excreted from the wearer can be suitably received by the auxiliary absorber. At this time, the auxiliary absorbent body is easily formed in a concave shape in the cross section in the width direction x by the central flap 12 formed so as to be tilted outward in the width direction x, and urine and the like overflow from the auxiliary absorbent body. It becomes difficult.

  In the absorbent article 1B, the central elastic member 6 is disposed between the top sheet 2 and the center sheet 14 and attached to the center sheet 14 with an adhesive or the like. The central elastic member 6 may be provided in this way. In addition, when the center flap 12 is provided, it is preferable that the center elastic member 6 is distribute | arranged to the inner side of the width direction x rather than the base 12B used as the starting point of the center flap 12, and, thereby, the center flap 12 whole Becomes easy to form so that it may approach a wearer's skin. As a result, the auxiliary absorber placed on the central flap 12 can also be disposed near the wearer's skin.

  As mentioned above, although the structural example of the absorbent article of this invention was demonstrated, the deformation | transformation of the absorbent article of this invention can add various deformation | transformation to said structural example. For example, the absorbent core 4 may be formed with a recess instead of the opening 5.

1, 1A, 1B: Absorbent article 2: Top sheet 3: Back sheet 4: Absorbent core 5: Opening 6: Central elastic member 7: Side elastic member 8: Standing flap 11: Leg-around elastic member 12: Central flap 15: Waist elastic member

Claims (9)

An absorbent article having a width direction and a front-rear direction, having a top sheet, a back sheet, and an absorbent core provided therebetween,
In the absorbent core, an opening or recess extending in the front-rear direction is formed at the center in the width direction,
The absorbent article is provided with a central elastic member that overlaps the absorbent core and extends in the front-rear direction along outer edges on both sides in the width direction of the opening or recess.   The absorbent article according to claim 1, wherein the central elastic member is provided in a region within 20 mm from an outer edge in the width direction of the opening or the recess.   The absorptive article according to claim 1 or 2 in which said central elastic member is provided in the skin side rather than said absorptive core.   The center elastic member extends forward from the front end of the opening or recess and / or extends rearward from the rear end of the opening or recess. The absorbent article as described in any one.   The absorptive article further has a side elastic member provided so that at least one copy may be located outside the outer edge of the width direction of the absorptive core. Absorbent article. The absorbent core has a front part and a rear part in the front-rear direction and an intermediate part between them, and the front part and the rear part are formed wider than the intermediate part,
The absorbent article according to claim 5, wherein the side elastic member is provided so as to overlap a front portion and a rear portion of the absorbent core and not to overlap an intermediate portion of the absorbent core.   The absorbent article according to claim 5 or 6, wherein the side elastic member is provided with a contraction force stronger than that of the central elastic member.   The absorbent article according to any one of claims 5 to 7, wherein the side elastic member is provided with a shorter length in the front-rear direction than the central elastic member. Standing flaps are provided on both sides in the width direction of the top sheet,
The said side elastic member is provided in the inner side of the width direction rather than the base used as the starting point of the standup | rising of the said rising flap, and is provided near the said absorptive core rather than the said base. The absorbent article as described in any one.