JP6176958B2 - Disposable pants-type diapers - Google Patents

Description

  The present invention relates to a disposable pants-type diaper for infants or adults.

  Conventionally, disposable pants-type diapers are widely known. Disposable pants-type diapers are, for example, an absorption in which an absorbent core is arranged between a top sheet and a back sheet on a crotch portion of an exterior member formed in a pants shape. The main body is attached and configured. For example, Patent Documents 1 to 3 disclose disposable pants-type diapers configured as described above.

JP 2010-094182 A JP 2004-49763 A JP-A-8-280739

  Disposable pants-type diapers are generally provided with leg elastic members along the edges of the leg openings. Leg elastic members form leg gathers around the wearer's legs, and urine from the crotch. Leakage of excrement such as is prevented. Moreover, a wearer's leg periphery is formed clearly by the leg part elastic member, and the wearing feeling of a diaper improves. Disposable pants-type diapers provide such effects by providing leg elastic members, but when the wearer is actually moving while wearing disposable pants-type diapers, the leg gathers are the garment of the wearer The gathering in the vicinity may partially tighten the leg gathers around the wearer's legs, reducing the feeling of wear.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a disposable pants-type diaper in which leg gathers are suitably formed around the legs of the wearer and the legs are clearly formed.

  The disposable pants-type diaper of the present invention that has solved the above-mentioned problems is a pant having a waist opening and a pair of leg openings, which is composed of a front abdomen, a back part, and a crotch part located therebetween. A disposable pants-type diaper having an exterior member formed in a shape, an absorbent body attached to a crotch portion of the exterior member, and having a top sheet, a back sheet, and an absorbent core disposed therebetween, The absorbent main body is formed so as not to extend outward in the width direction with respect to the outer edge of the exterior member, and the edge portion where the absorbent core does not exist is formed at both ends in the width direction. A leg elastic member is provided along the edge of the opening so that at least a portion thereof overlaps the edge portion, and the edge portion is not fixed to the exterior member at a portion overlapping the leg elastic member. Have

  In the disposable pants-type diaper of the present invention, the portion provided with the leg elastic member of the exterior member is likely to hit the wearer's heel portion via the edge portion, and as a result, the groin portion is worn from the wearer's crotch portion. The slip of the portion provided with the leg elastic member of the exterior member is improved. For this reason, leg gathers formed by the leg elastic members are less likely to gather around the wearer's throat, and leg gathers are easily formed evenly around the wearer's legs, improving the wearing feeling of the diaper, Leakage of urine etc. from the part is also easily prevented. Further, when the diaper is worn, the edge portion is not easily protruded from the exterior member, and the leg periphery of the diaper is clearly formed.

  It is preferable that the absorptive main body is fixed to the exterior member on the inner side in the width direction than the portion where the edge portion overlaps the leg elastic member. Thus, if the absorptive main body is fixed to the exterior member, the edge portion becomes difficult to move due to the movement of the portion where the leg elastic member of the exterior member is provided, and the leg elastic member of the exterior member It becomes easy to form so that the part provided with may slide with respect to an edge part.

  The edge portion is preferably provided with a width of 10 mm or more. If the edge portion is formed in this way, the edge portion overlaps with the leg elastic member in a wide range, and leg gathers are easily formed evenly around the wearer's leg.

  It is preferable that the edge portion is not fixed to the exterior member in a region extending from the front end to the rear end of the portion overlapping the leg elastic member. If the edge portion is not fixed to the exterior member over such a range, the portion of the exterior member provided with the leg elastic member is easily moved around the wearer's leg over a wide range, and around the wearer's leg. Leg gathers are easily formed evenly.

  The absorbent main body is preferably provided with crotch elastic members between the absorbent core and the back sheet on both sides in the width direction. By providing the crotch elastic member, the absorbent core is lifted toward the skin of the wearer, and urine excreted from the wearer can be suitably received. Also, when wearing a diaper, the edge of the absorbent main body is easily positioned near the skin of the wearer, and the part provided with the leg elastic member of the exterior member is worn so that the edge is appropriately sandwiched It becomes easy to hit the person's skin.

  When the crotch elastic member is provided in the absorbent main body, the leg elastic member may be provided so that at least a part thereof overlaps with the crotch elastic member. In this case, it is preferable that the absorbent main body is not fixed to the exterior member at a portion where the crotch elastic member overlaps the leg elastic member. If the absorbent main body and the exterior member are configured in this manner, the leg elastic member and the crotch elastic member contract independently of each other, and the functions of the respective elastic members are easily exhibited.

  The leg elastic member extends along the front edge of the leg opening, extends along the crotch in the width direction, and extends along the rear edge of the leg opening. You may comprise from the back side leg elastic member extended across the width direction. In this case, it is preferable that the front leg elastic member and the rear leg elastic member are intermittently provided at a portion crossing the crotch portion in the width direction. If the front leg elastic member and the rear leg elastic member are formed in this way, the exterior member is less susceptible to the force of contracting inward in the width direction at the crotch, and when the diaper is worn, The part is difficult to protrude greatly from the exterior member.

  According to the disposable pants-type diaper of the present invention, leg gathers are easily formed evenly around the legs of the wearer, and the wearing feeling of the diaper is improved, and the effect of preventing leakage of urine and the like from the crotch is also improved. Further, when the diaper is worn, the edge portion is not easily protruded from the exterior member, and the leg periphery of the diaper is clearly formed.

An example of the disposable pants type diaper of this invention is represented, and the perspective view of a disposable pants type diaper is represented. The top view which looked at the state which unfolded and developed the joint of the front part and back part of a disposable pants type diaper shown in Drawing 1 from the skin side. The top view which looked at the state which unfolded and developed the joint of the front part and back part of the disposable pants type diaper shown in Drawing 1 from the outside. The AA sectional view of the disposable underpants type diaper shown in Drawing 2 and Drawing 3 is expressed.

  The disposable pants-type diaper of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments shown in the drawings. 1-4, an example of the disposable pants-type diaper of this invention is shown. FIG. 1 is a perspective view of a disposable pants-type diaper, and FIG. 2 is a view of a state in which the front abdomen and the back of the disposable pants-type diaper shown in FIG. FIG. 3 shows a view of the state where the front abdomen and the back part of the disposable pants-type diaper shown in FIG. The AA sectional view of the disposable underwear type diaper shown in Drawing 3 is expressed. In the drawings, 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.

  The disposable pants-type diaper 1 of the present invention has an exterior member 2 formed in a pants shape having a waist opening 3 and a pair of leg openings 4. The waist opening 3 is an opening for passing the wearer's torso, and the leg opening 4 is an opening for passing the wearer's leg.

  The exterior member 2 includes a front abdominal part P, a back part Q, and a crotch part R positioned therebetween. The exterior member 2 is formed in, for example, a pants shape by joining the front abdomen P and the back part Q at the joints 15 at both ends in the width direction x. The front abdominal part P corresponds to a part applied to the wearer's belly side when wearing the diaper, and the back part Q corresponds to a part applied to the wearer's back side when wearing the diaper. The crotch portion R is located between the front abdominal portion P and the back portion Q, and corresponds to a portion applied to the wearer's crotch. Leg openings 4 are formed on both sides of the crotch portion R in the width direction. The crotch portion R is, for example, a portion located in the middle of the exterior member 2 divided into three in the front-rear direction in a state where the front abdomen P and the back portion Q of the exterior member 2 are unbonded and developed in a plane. When formed in a shape, they are not joined to each other on both sides in the width direction x.

  In the disposable pants-type diaper, the front-rear direction means the direction from the front abdomen P to the back part Q, and corresponds to the front-rear direction of the wearer's crotch when the diaper is worn. The width direction corresponds to the left and right direction of the wearer when the diaper is worn. The skin side surface of the disposable pants-type diaper means a surface on the side facing the wearer's skin when the diaper is worn. The outer surface of the disposable pants-type diaper means a surface that faces away from the wearer when the diaper is worn.

  The exterior member 2 may be composed of only one layer or may be composed of a plurality of layers. Preferably, the exterior member 2 includes an outer sheet 5 and an inner sheet 6 laminated on the skin side surface of the outer sheet 5.

  An absorbent main body 7 is attached to the crotch portion R of the exterior member 2. The absorptive main body 7 includes a top sheet 8, a back sheet 9, and an absorptive core 10 disposed therebetween (see FIG. 4). The top sheet 8 is arranged on the wearer side with respect to the absorbent core 10, and the back sheet 9 is arranged on the outer side (opposite side of the wearer) with respect to the absorbent core 10. As for the absorptive main body 7, the back sheet 9 is attached to the skin side surface of the exterior member 2. FIG. The absorptive main body 7 should just exist in the crotch part R of the exterior member 2, and may further extend to the front part P and / or the back part Q.

  The shape (planar shape) of the absorbent core 10 is not particularly limited. Examples of the shape of the absorbent core 10 include a substantially rectangular shape, an hourglass shape, a gourd shape, and a battledore shape. 2 and 3, the absorbent core 10 is formed in a substantially rectangular shape.

  A leg elastic member 16 is provided on the exterior member 2 along the edge of the leg opening 4. In the drawing, the leg elastic member 16 includes a front leg elastic member 16A provided along the front edge of the leg opening 4 and a rear leg elasticity provided along the rear edge of the leg opening 4. It is comprised from the member 16B. The front leg elastic member 16 </ b> A and the rear leg elastic member 16 </ b> B provide an elastic member over substantially the entire periphery of the edge of the leg opening 4. The leg elastic members 16 form leg gathers along the wearer's legs and prevent excretion such as urine from the crotch. In the drawing, the front leg elastic member 16A and the rear leg elastic member 16B are provided apart from each other, but the front leg elastic member 16A and the rear leg elastic member 16B are in contact with each other or cross each other. May be. Different leg elastic members may be provided along the edges of the left and right leg openings 4. The leg elastic member is preferably provided so that at least a part thereof extends obliquely with respect to the front-rear direction y.

  By the way, in the disposable pants-type diaper, when the part where the leg elastic member of the exterior member is directly applied to the skin of the wearer, the exterior member becomes slippery with respect to the wearer's skin, and the disposable pants-type diaper is worn If it moves in the state where it did, leg gathers formed with the leg elastic member will be easy to gather near a wearer's ridge part. As a result, the tightening by the leg gathers is partially tightened around the wearer's leg and the feeling of wear is reduced. In particular, when the wearer sweats, slipping of the exterior member on the portion where the leg elastic member is provided tends to decrease.

  Therefore, in the disposable pants-type diaper 1 of the present invention, the edge 11 where the absorbent core 10 does not exist is provided at both ends in the width direction x of the absorbent main body 7, and the edge 11 is at least one of the leg elastic members 16. The edge portion 11 is prevented from being fixed to the exterior member 2 at the portion overlapping the leg elastic member 16. That is, the exterior member 2 is provided with a leg elastic member 16 along the edge of the leg opening 4 so that at least a portion thereof overlaps the edge 11, and the edge 11 is connected to the leg elastic 16. The overlapping portion is not fixed to the exterior member 2. In FIG. 3, the location where the absorbent main body 7 is fixed to the exterior member 2 is represented by cross hatching, and in FIG. In the present invention, the positional relationship between the absorbent main body and the exterior member is such that the elastic member disposed in the disposable pants-type diaper is fully extended (that is, the elastic member is removed or the elastic member is cut finely). The state in which the contraction force of the elastic member is not expressed). It is measured on the same conditions also about the suitable range of various length mentioned later. FIG. 2 and FIG. 3 show a development plan view of the disposable pants-type diaper in a state where the elastic member is fully extended.

  As a result of the configuration of the disposable pants-type diaper 1 as described above, the portion of the exterior member 2 on which the leg elastic member 16 is provided is likely to hit the wearer's heel portion via the edge portion 11, and the wearer The slip of the portion of the exterior member 2 where the leg elastic member 16 is provided is improved from the crotch portion to the heel portion. In addition, the portion provided with the leg elastic member 16 of the exterior member 2 does not overlap with the relatively rigid absorbent core 10, but overlaps with the edge portion 11 where the absorbent core 10 does not exist. The effect of tightening around the legs due to the contraction force of the elastic member 16 is also preferably exhibited. As a result, the leg gathers formed by the leg elastic members 16 are less likely to gather near the wearer's heel portion near the wearer's heel portion, and leg gathers are easily formed evenly around the wearer's leg. . Therefore, the wearing feeling of the diaper is improved and leakage of urine and the like from the crotch part is easily prevented.

  Furthermore, in the disposable pants-type diaper 1 of the present invention, the absorbent main body 7 is formed so as not to extend outward in the width direction x from the outer edge of the exterior member 2. Specifically, the absorbent main body 7 is formed so as not to extend outward in the width direction x from the outer edge of the exterior member 2 in a state in which the elastic member arranged in the diaper is completely extended. As a result of the configuration of the disposable pants-type diaper 1 as described above, when the diaper is worn, the peripheral edge portion 11 is hardly protruded from the exterior member 2, and the leg circumference of the diaper is clearly formed. This will be described in detail. When the elastic member arranged in the diaper is fully extended, even when the edge 11 of the absorbent main body 7 does not protrude from the exterior member 2, when the diaper is worn, In some cases, the exterior member 2 contracts due to the contraction force of the leg elastic member 16 and the edge 11 protrudes from the exterior member 2. Therefore, in order to prevent the edge 11 from protruding greatly from the exterior member 2 even when the diaper is worn, in the disposable pants-type diaper 1 of the present invention, the absorbent main body 7 is more than the outer edge of the exterior member 2. It is formed so as not to extend outward in the width direction x.

  The edge portion 11 corresponds to a portion where the absorbent core 10 does not exist at both end portions in the width direction x of the absorbent main body 7. That is, the absorbent main body 7 has the edge portion 11 formed outward from the edge in the width direction x of the absorbent core 10. The edge portion 11 is defined as a portion including an end edge in the width direction x of the absorbent main body 7. In FIG. 4, the back sheet 9 is formed wider than the top sheet 8, and the back sheet 9 is folded at the edge in the width direction x of the absorbent main body 7, whereby the edge portion 11 where the absorbent core 10 does not exist. Is formed. At this time, the folded back sheets 9 are preferably joined to each other by a joining means such as an adhesive. Although not shown in the drawings, the edge portion 11 may be configured by laminating the top sheet 8 and the back sheet 9, or may be configured by the top sheet 8.

  The edge portion 11 is preferably provided so as to have a certain width. Specifically, the edge portion 11 is preferably provided with a width of 10 mm or more, more preferably 15 mm or more, and further preferably 20 mm or more. If the edge part 11 is formed in this way, the edge part 11 and the leg elastic member 16 overlap in a wide range, and leg gathers are easily formed evenly around the wearer's leg. On the other hand, even if the width of the edge portion 11 is too wide, the portion where the absorbent core 10 can be installed is reduced and the absorption capacity of the diaper is reduced. Therefore, the width of the edge portion 11 is preferably 50 mm or less, and 40 mm or less. More preferred. Note that the width of the edge portion 11 means the maximum length of the edge portion 11 in the width direction x.

  About the width | variety of the absorptive main body 7, although it should just be formed so that the absorptive main body 7 may not extend in the width direction x from the outer edge of the exterior member 2, as demonstrated above, If it is too narrow, the edge 11 and the leg elastic member 16 may not sufficiently overlap in the vicinity of the wearer's ridge when the diaper is worn. Therefore, the width of the absorbent main body 7 (the maximum length in the width direction x) is preferably formed to be the same as or wider than the width of the narrowest portion of the crotch portion R of the exterior member 2. More preferably, as shown in FIG. 2 and FIG. 3, the width of the absorbent main body 7 is formed wider than the width of the narrowest portion of the crotch portion R of the exterior member 2.

  The edge part 11 may be provided over the whole front-back direction y of the absorptive main body 7, and may be provided only in part. For example, when the absorbent core 10 has an hourglass shape, the edge portion 11 is formed at the center of the absorbent body 7 in the front-rear direction y, and at both ends of the absorbent body 7 in the front-rear direction y. It may not be formed.

  The edge portion 11 may not be fixed to the exterior member 2 at least in a portion overlapping with the leg elastic member 16, but preferably, the edge portion 11 is not fixed to the exterior member 2 to some extent in the front-rear direction y. . Therefore, as shown in FIG. 3, it is preferable that the edge portion 11 is not fixed to the exterior member 2 in a region from the front end to the rear end of the portion overlapping the leg elastic member 16. As a result, the portion provided with the leg elastic member 16 of the exterior member 2 is easily moved around the wearer's leg over a wide range, and leg gathers are easily formed evenly around the wearer's leg. In addition, it is preferable that the edge part 11 is being fixed to the exterior member 2 in the both ends of the front-back direction y of the absorptive main body 7, As a result, the edge part 11 is always the width direction x even in the state which wore the diaper. Extending outwardly, the edge portion 11 is likely to overlap the leg elastic member 16.

  On the other hand, the absorbent main body 7 is preferably fixed to the exterior member 2 at an inner portion in the width direction x rather than a portion where the edge portion 11 overlaps the leg elastic member 16. Thus, if the absorptive main body 7 is being fixed to the exterior member 2, the edge part 11 will become difficult to move with the movement of the part in which the leg elastic member 16 of the exterior member 2 was provided, and the exterior member 2 will become difficult to move. The portion provided with the leg elastic member 16 is easily formed so as to slide relative to the edge portion 11. As a result, the leg gathers formed by the leg elastic members 16 are less likely to gather near the wearer's throat, and leg gathers are easily formed evenly around the wearer's legs.

  The absorbent main body 7 is preferably provided with rising flaps 13 on both sides in the width direction x of the absorbent core 10 (see FIGS. 2 and 4). By providing the rising flap 13, it is possible to prevent side leakage of excrement such as urine. The rising flap 13 is preferably liquid-impermeable.

  It is preferable that an elastic member 14 for standing is provided at the upper end portion (end portion on the wearer side) in a state where the rising flap 13 is raised. Due to the contraction force of the standing elastic member 14, the rising flap 13 is easily raised.

  In the rising flap 13, it is preferable that an upright base portion that becomes a rising base point is located inward of the edge in the width direction x of the absorbent main body 7, and is located in the vicinity of the edge in the width direction x of the absorbent core 10. It is preferable. By providing the rising flap 13 in this manner, the edge portion 11 is hung by the rising flap 13 and is difficult to rise, and when the diaper is worn, the edge portion 11 is placed between the skin of the wearer and the exterior member 2. It becomes easy to position. For example, the rising base of the rising flap 13 is preferably 10 mm or more inward from the edge in the width direction x of the absorbent main body 7, more preferably 15 mm or more inward, and 20 mm or more inward. Is more preferable.

  The absorbent main body 7 is preferably provided with crotch elastic members 12 between the absorbent core 10 and the back sheet 9 on both sides in the width direction x (see FIGS. 3 and 4). The crotch elastic member 12 is preferably provided so as to extend in the front-rear direction y. By providing the crotch elastic member 12, the absorbent core 10 is lifted toward the wearer's skin, and urine excreted from the wearer can be suitably received. Further, when the diaper is worn, the base of the edge portion 11 of the absorbent main body 7 is easily located near the skin of the wearer, and as a result, the portion provided with the leg elastic member 16 of the exterior member 2 is It becomes easy to hit a wearer's skin by sandwiching the edge 11 appropriately. In addition, it is preferable that an elastic member is not provided in the edge part 11.

  The crotch elastic member 12 is preferably provided in the vicinity of the edge of the absorbent core 10 in the width direction x. Specifically, the crotch elastic member 12 is preferably provided in a region within 40 mm from the edge of the absorbent core 10 in the width direction x, and more preferably provided in a region within 30 mm. If the crotch elastic member 12 is provided in this way, both ends in the width direction x of the absorbent core 10 are lifted by the contraction force of the crotch elastic member 12, and urine etc. excreted from the wearer is suitably received. Will be able to.

  The number of elastic members constituting the crotch elastic member 12 is not particularly limited. In FIG. 3 and FIG. 4, one crotch elastic member 12 is arranged on each side in the width direction x, but a plurality of crotch elastic members 12 may be arranged.

  It is preferable that the absorbent main body 7 is not fixed to the exterior member 2 in the portion where the crotch elastic member 12 is provided. That is, it is preferable that the absorbent main body 7 is not fixed to the exterior member 2 from the edge portion 11 to the portion where the crotch elastic member 12 is provided. If the absorbent main body 7 is not fixed to the exterior member 2 at the portion where the crotch elastic member 12 is provided, both ends of the absorbent main body 7 in the width direction x are formed by the contraction force of the crotch elastic member 12. The urine that is lifted away from 2 and excreted from the wearer can be suitably received.

  When the crotch elastic member 12 is provided in the absorbent main body 7, the leg elastic member 16 may be provided so that at least a part thereof overlaps the crotch elastic member 12. In this case, it is preferable that the absorbent main body 7 is not fixed to the exterior member 2 at a portion where the crotch elastic member 12 overlaps the leg elastic member 16. That is, it is preferable that the absorbent main body 7 is not continuously fixed to the exterior member 2 from a portion where the leg elastic member 16 overlaps the edge portion 11 to a portion where the leg elastic member 16 overlaps the crotch elastic member 12. Thus, if the absorptive main body 7 and the exterior member 2 are fixed (or not fixed), the leg elastic member 16 and the crotch elastic member 12 contract independently of each other, and each elastic member It becomes easy to demonstrate the function suitably. Preferably, the absorbent main body 7 is preferably not fixed to the exterior member 2 in a region from the front end to the rear end of the portion where the crotch elastic member 12 overlaps the leg elastic member 16.

  When the absorbent main body 7 is not fixed to the exterior member 2 at the portion where the crotch elastic member 12 is provided, the absorbent main body 7 is fixed to the exterior member 2 at the inner side in the width direction x than the portion. It is preferable. Thus, if the absorptive main body 7 is being fixed to the exterior member 2, the absorptive main body 7 will become easy to be formed in the center part of the width direction x, and it will receive urine etc. excreted from the wearer suitably. Will be able to. Further, the edge portion 11 becomes difficult to move due to the movement of the portion of the exterior member 2 where the leg elastic member 16 is provided, and the portion of the exterior member 2 where the leg elastic member 16 is provided is the edge portion 11. It becomes easy to be formed to slide against.

  At both ends in the front-rear direction y of the absorbent main body 7, it is preferable that the both ends of the absorbent main body 7 in the width direction x are fixed to the exterior member 2 over the entire width direction x. . For example, as shown in FIG. 3, the absorbent main body 7 is preferably fixed to the exterior member 2 at a joining region formed in a substantially I shape. The absorptive main body 7 should just be fixed to the exterior member 2 by fixing means, such as an adhesive agent, for example.

  As shown in the drawing, the leg elastic member 16 extends along the front edge of the leg opening 4, and extends between the front leg elastic member 16 </ b> A extending across the crotch R in the width direction x and the leg opening 4. The rear leg elastic member 16B preferably extends along the rear edge and extends across the crotch R in the width direction x. If the leg elastic member 16 is provided in this way, the leg elastic member 16 can be easily disposed on the exterior member 2 when the exterior member 2 is continuously manufactured.

  When the leg elastic member 16 is provided as described above, it is preferable that the front leg elastic member 16A and the rear leg elastic member 16B are provided intermittently at a portion crossing the crotch portion R in the width direction x. Specifically, the front leg elastic member 16A and the rear leg elastic member 16B may be intermittently provided between the edge portions 11 formed at both ends in the width direction x of the absorbent main body 7. preferable. When the front leg elastic member 16A and the rear leg elastic member 16B are provided in this way, the exterior member 2 is less likely to be contracted inward in the width direction x at the crotch, and when the diaper is worn In addition, the edge portion 11 is not easily protruded from the exterior member 2. Moreover, the absorptive main body 7 becomes difficult to be distorted by the crotch portion R, and the absorptive main body 7 can easily receive urine or the like excreted from the wearer. As a method of intermittently providing the leg elastic member 16, for example, after fixing the leg elastic member 16 to the exterior member 2, the leg elastic member 16 may be cut with a cutter or the like. At this time, the leg elastic member 16 is preferably cut at a plurality of locations.

  The number of elastic members constituting the leg elastic member 16 is not particularly limited. In the drawing, two front leg elastic members 16A and two rear leg elastic members 16B are provided, but one each may be provided, or three or more may be provided.

  A plurality of waist elastic members 17 are preferably provided along the edge of the waist opening 3 at the end in the front-rear direction y of the exterior member 2. A waist gather is formed around the waist of the wearer by the waist elastic member 17 and leakage of excrement such as urine from the back side or the abdomen side is prevented.

  It is preferable that a plurality of trunk elastic members 18 extending in the width direction x are provided on the front abdomen P and the back part Q of the exterior member 2. The torso elastic members 18 are preferably disposed between the waist elastic members 17 and the leg openings 4 at a wider interval than the waist elastic members 17, and the torso elastic members 18 allow the wearer to fit around the waist. Is increased.

  For the leg elastic member 16, the waist elastic member 17, and the trunk elastic member 18 provided in the exterior member 2, as shown in the drawing, when the exterior member 2 is composed of the outer sheet 5 and the inner sheet 6, It is preferable to be disposed between the outer sheet 5 and the inner sheet 6.

  As each elastic member provided in the disposable pants-type diaper, an elastic stretchable material used for a normal disposable diaper such as polyurethane yarn, polyurethane film, natural rubber or the like can be used. Each elastic member is preferably fixed to the diaper in a stretched state, and is preferably fixed with an adhesive such as a hot melt adhesive. For example, a polyurethane yarn having a fineness of 100 to 2,500 dtex is stretched and arranged at a magnification of 1.1 to 5.0 times and fixed. As the adhesive, it is preferable to use a rubber-based hot melt adhesive.

  The material of each member which comprises the disposable pants type diaper of this invention is demonstrated. A top sheet is a sheet | seat located in a wearer side in the case of diaper wear, and it is preferable that it is 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 diaper 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 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. In this case, a sheet material usable for the top sheet can be used as the inner sheet, and a sheet material usable for the back sheet can be used as the outer 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. Further, the absorbent material may include a heat-fusible fiber such as a polyolefin fiber such as polyethylene or polypropylene, a polyester fiber such as PET, or a polyamide fiber such as nylon. These heat-fusible fibers may be subjected to a hydrophilic treatment with a surfactant or the like in order to increase the affinity with body fluid such as urine.

  It is preferable that an absorptive material contains a hydrophilic fiber from the point which improves the absorption speed | rates, such as urine. Moreover, it is preferable that an absorptive material contains a water absorbing resin from the point which raises absorption capacity. Therefore, it is preferable that an absorptive core contains a hydrophilic fiber (especially pulp fiber) and a water absorbing resin. 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 absorbent core may be a sheet-like absorber. Examples of the sheet-like absorber include those formed so as to have a water-absorbing resin between nonwoven fabrics and have no pulp fibers. Since the sheet-like absorbent body thus formed has a water-absorbing resin between the nonwoven fabrics, a high absorption capacity can be realized. Moreover, since a sheet-like absorber does not have pulp fibers between nonwoven fabrics, it can be formed thin without being bulky.

  As a sheet-like absorber, a water-absorbing fiber may be used as an absorbent material. Also in this case, the sheet-like absorbent body is not bulky and is formed thin. Examples of the water-absorbing fiber include a fiber containing a protonated or salt-formed carboxyl group. For example, as disclosed in JP-B-52-42916, water-absorbing fibers can be obtained by hydrolyzing acrylic fibers and converting nitrile groups contained in the acrylic fibers into carboxyl groups. At this time, it is preferable that the carboxyl group contained in the water-absorbing fiber forms an alkali metal salt or an ammonia salt. Moreover, a water absorbing fiber can be manufactured by immersing a hydrophilic fiber in acrylic acid and precipitating acrylic acid on the fiber surface.

1: Disposable pants-type diaper 2: Exterior member 3: Waist opening 4: Leg opening 7: Absorbent body 8: Top sheet 9: Back sheet 10: Absorbent core 11: Edge 12: Crotch elastic member 16 , 16A, 16B: Leg elastic member P: Front abdomen Q: Rear back R: Crotch

Claims (5)

An exterior member formed of a front abdomen and a back part and a crotch part located between them, and formed into a pants shape having a waist opening and a pair of leg openings,
A disposable pants-type diaper that is attached to the crotch portion of the exterior member and has a top sheet, a back sheet, and an absorbent main body having an absorbent core disposed therebetween,
The absorbent main body is formed so as not to extend outward in the width direction than the outer edge of the exterior member, and the edge portion where the absorbent core does not exist is formed at both ends in the width direction,
The absorbent main body is provided with a crotch elastic member between the absorbent core and the back sheet on both sides in the width direction,
Wherein the outer member along the edge of the leg openings at least partially provided with leg elastic members so as to overlap with the edge portion Rutotomoni, the leg elastic member is at least partially the Provided to overlap the crotch elastic member,
The edge portion is not fixed to the exterior member at a portion overlapping the leg elastic member, and the absorbent main body is attached to the exterior member at a portion where the crotch elastic member overlaps the leg elastic member. Disposable pants-type diapers characterized by being not fixed .   The disposable pants-type diaper according to claim 1, wherein the absorbent main body is fixed to the exterior member at an inner side in a width direction than a portion where the edge portion overlaps the leg elastic member.   The disposable pants-type diaper according to claim 1 or 2, wherein the edge is provided with a width of 10 mm or more. The leg elastic member extends along a front edge of the leg opening, and extends along a front leg elastic member extending across the crotch in the width direction and a rear edge of the leg opening. The rear leg elastic member extending across the crotch in the width direction,
The disposable pants-type diaper according to any one of claims 1 to 3 , wherein the front leg elastic member and the rear leg elastic member are provided intermittently at a portion crossing the crotch portion in the width direction. . The disposable pants-type diaper according to any one of claims 1 to 4 , wherein the edge portion is not fixed to the exterior member in a region from a front end to a rear end of a portion overlapping with the leg elastic member. .

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