JP4726641B2 - Absorbent articles - Google Patents

Description

  The present invention relates to a pants-type absorbent article having a trunk opening at the upper end and a pair of leg openings at the lower end.

  Conventionally, as a disposable diaper that receives excrement from a wearer, a pants type is used. In a pants-type disposable diaper, the elastic member is provided around the upper body opening and the pair of lower leg openings to improve the adhesion of the disposable diaper to the wearer, and the disposable diaper is disposable depending on the weight of excrement etc. A structure that prevents the diaper from shifting is adopted.

  In patent document 1, in the trunk periphery part between a waist opening part (trunk part opening) and a pair of leg opening parts (leg part opening) of a pants-type disposable diaper, a plurality of gathers are formed over the entire circumference. Wearing the waist area of disposable diapers by providing elastic members, narrowing the interval between the plurality of elastic members closer to the waist opening, and increasing the stretch rate of each elastic member closer to the waist opening A technique that fits a person well is disclosed.

Moreover, in patent document 2, by providing the some auxiliary | assistant opening part which penetrates the outer-layer sheet | seat of a waist part in the belly side part of a pants type disposable diaper, a finger is caught on an auxiliary | assistant opening part at the time of wear, and a disposable diaper is easy Techniques for wearing are disclosed.
JP-A-8-112309 JP 2004-267335 A

  By the way, a pants-type disposable diaper usually inserts a leg from a trunk opening of a disposable diaper into a leg opening, then puts a thumb inside the trunk opening and grasps the vicinity of the trunk opening, and then disposes the disposable diaper at the waist. It is worn by pulling up.

  In the disposable diaper of patent document 1, since the space | interval of an elastic member becomes narrow as it approaches a waist opening part, when wearing, it becomes difficult to hook a finger | toe on a disposable diaper stably. For this reason, depending on the wearer, the disposable diaper cannot be firmly held, and the disposable diaper may not be easily worn.

  Moreover, in the disposable diaper of patent document 2, since it has an auxiliary opening part in an outer layer sheet | seat, there exists a possibility that urine etc. may leak outside from an auxiliary opening part, and the intensity | strength of the waist part which has an auxiliary opening part falls. The outer layer sheet may be torn.

  The present invention has been made in view of the above problems, and in a pant-type absorbent article, it improves the adhesion of the front part and the rear part of the main body part to the wearer and facilitates the wearing of the absorbent article. It is an object.

The invention according to claim 1 is a pants-type absorbent article having a trunk opening at the upper end and a pair of leg openings at the lower end, which is in contact with the skin on the abdomen and dorsal side of the wearer. A body portion that is bent at an intermediate portion between the rear portion and the rear portion, and the left and right sides of the front portion when the intermediate portion is directed downward are joined to the left and right sides of the rear portion, respectively. A body elastic member that forms a body part opening gather by being contracted and contracted along the edge of the body part opening, and the body part along each edge of the pair of leg part openings And a leg elastic member that forms a leg opening gather by being contracted with each other, and is joined and contracted along the left-right direction between the body elastic member and the leg elastic member By the front part A rear elastic member that forms a rear portion by joining and contracting along the left-right direction between the front elastic member that forms a cap and the body elastic member and the leg elastic member A body elastic member, and the main body portion includes an absorbent core, a top sheet covering a main surface of the absorbent core on the wearer side, and an exterior sheet, and the front elastic member and the rear elastic member At least one of the members includes a first elastic yarn group in which a plurality of elastic yarns are arranged in a vertical direction perpendicular to the left-right direction at a first interval, and a plurality of elastic yarns below the first elastic yarn group in the vertical direction. A second elastic yarn group arranged at a second interval, wherein the absorbent core is located below the second elastic yarn group, and a lower end of the first elastic yarn group and an upper end of the second elastic yarn group, The vertical direction between That distance is greater than any of the first interval and the second interval.

  Invention of Claim 2 is an absorbent article of Claim 1, Comprising: The said 1st space | interval and the said 2nd space | interval are 1 mm or more and 9 mm or less, The said lower end of the said 1st elastic yarn group, The distance between the upper end of the second elastic yarn group is 10 mm or more and 20 mm or less.

  Invention of Claim 3 is an absorbent article of Claim 1 or 2, Comprising: The tension | tensile_strength which arises in each of the said 1st elastic thread group and the said 2nd elastic thread group in the state worn by the wearer. The tension generated in the body elastic member is smaller.

  Invention of Claim 4 is an absorbent article in any one of Claim 1 thru | or 3, Comprising: The cross-sectional area of the elastic yarn located in the said lower end of the said 1st elastic thread group is the said 1st elastic thread group. It is larger than the cross-sectional area of the other elastic yarn and the elastic yarn located at the upper end of the second elastic yarn group.

Invention of Claim 5 is an absorbent article in any one of Claim 1 thru | or 4, Comprising: Said at least one of the said front part elastic member and the said back part elastic member is a said 2nd elastic thread group. Below, a third elasticity in which a plurality of elastic yarns are arranged in the vertical direction at a third interval smaller than the distance between the lower end of the first elastic yarn group and the upper end of the second elastic yarn group. A thread group , wherein the absorbent core is positioned below the third elastic thread group, and the distance in the vertical direction between the lower end of the second elastic thread group and the upper end of the third elastic thread group is the first Greater than any of the second interval, the second interval, and the third interval.

  The invention according to claim 6 is the absorbent article according to claim 5, wherein each of the first elastic yarn group, the second elastic yarn group, and the third elastic yarn group includes only two elastic yarns. .

  Invention of Claim 7 is an absorbent article in any one of Claim 1 thru | or 6, Comprising: It is related with the said up-down direction between the upper end of a said 1st elastic thread group, and the lower end of the said trunk | drum elastic member. The distance is larger than both the first interval and the second interval.

  Invention of Claim 8 is an absorbent article in any one of Claim 1 thru | or 7, Comprising: Each of the said front part elastic member and the said back part elastic member is said 1st elastic thread group and said 1st. 2 elastic yarn groups are provided.

The invention described in claim 9 is a pant-type absorbent article having a trunk opening at the upper end and a pair of leg openings at the lower end, which is in contact with the skin on the abdomen and dorsal side of the wearer. A body portion that is bent at an intermediate portion between the rear portion and the rear portion, and the left and right sides of the front portion when the intermediate portion is directed downward are joined to the left and right sides of the rear portion, respectively. A body elastic member that forms a body part opening gather by being contracted and contracted along the edge of the body part opening, and the body part along each edge of the pair of leg part openings And a leg elastic member that forms a leg opening gather by being contracted with each other, and is joined and contracted along the left-right direction between the body elastic member and the leg elastic member By the front part A rear elastic member that forms a rear portion by joining and contracting along the left-right direction between the front elastic member that forms a cap and the body elastic member and the leg elastic member A body elastic member, and the main body portion includes an absorbent core, a top sheet covering a main surface of the absorbent core on the wearer side, and an exterior sheet, and the front elastic member and the rear elastic member At least one of the members is a first elastic yarn and a second elastic yarn disposed below the first elastic yarn and spaced apart from the first elastic yarn in the vertical direction perpendicular to the left-right direction. When, below the said second elastic yarn, and a third elastic yarn which is arranged at a smaller second distance greater than said second elastic yarn and said first distance with respect to the vertical direction, the first 3 Below the elastic yarn Serial absorbent core is located.

  In this invention, while improving the adhesiveness with respect to the wearer of the front part and back part of a main-body part, it can make easy wearing of an absorbent article.

  FIG. 1 is a diagram showing an appearance of an absorbent article 1 according to the first embodiment of the present invention. FIGS. 2 and 3 are front views of the absorbent article 1 (that is, the wearer's stomach side). FIG. 2 is a diagram showing a portion located on the back side of the wearer, and FIG. The absorbent article 1 is a pants-type disposable diaper having a trunk opening 11 at the upper end (that is, the upper end in FIG. 1) and a pair of leg openings 12 at the lower end.

  FIG. 4 is a plan view seen from the wearer side in a state where the absorbent article 1 is unfolded. As shown in FIG. 4, the absorbent article 1 includes a substantially sheet-like main body 2. In the absorbent article 1, the lower part 201 of the main body 2 in FIG. 4 is in contact with the skin on the abdomen of the wearer, and the upper part 203 in FIG. 4 is in contact with the skin on the back of the wearer. In the following description, the parts 201 and 203 in contact with the skin of the wearer's abdomen and dorsal side of the body part 2 are referred to as “front part 201” and “rear part 203”, respectively. A portion 202 that faces the wearer's crotch portion is referred to as an “intermediate portion 202”.

  As shown in FIG. 1, in the absorbent article 1, the body portion 2 is bent at the intermediate portion 202, and the left and right sides of the front portion 201 when the intermediate portion 202 faces downward (that is, the front portion 201 of the front portion 201. The parts on both sides in the width direction) are joined to the parts on the left and right sides of the rear part 203 (that is, parts on both sides in the width direction of the rear part 203).

  FIG. 5 is a cross-sectional view of the absorbent article 1 cut at the position AA shown in FIG. As shown in FIGS. 4 and 5, the main body 2 includes an absorbent core 22 that is an absorbent body, a top sheet 21 that covers the main surface inside the absorbent core 22 (that is, the wearer side), and an outer side of the absorbent core 22 ( That is, the back sheet 23 that covers the main surface on the opposite side of the wearer side), the exterior sheet 24 that covers the outside of the back sheet 23, and the longitudinal direction of the absorbent core 22 (ie, the vertical direction in FIG. 4). A pair of side wall portions 3 provided on both sides in the width direction perpendicular to the longitudinal direction of the absorbent core 22 are provided over the entire length. In FIG. 4, the outline of the absorbent core 22 is indicated by a thick broken line. The top sheet 21 and the back sheet 23 are joined to each other around the absorbent core 22 by a hot melt adhesive or the like, and the side wall portion 3 is joined to the side of the absorbent core 22. Further, the exterior sheet 24 and the back sheet 23 are also joined by a hot melt adhesive or the like.

  The top sheet 21 is a non-woven fabric formed of a liquid-permeable material, for example, a hydrophilic fiber, and quickly captures moisture of excrement from the wearer and moves it to the absorbent core 22. Nonwoven fabrics used as the top sheet 21 are, for example, point bond nonwoven fabrics, air-through nonwoven fabrics, and spunlace nonwoven fabrics. As hydrophilic fibers forming these nonwoven fabrics, cellulose, rayon, cotton, or the like is usually used. As the top sheet 21, a liquid-permeable nonwoven fabric formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon) whose surface is hydrophilically treated with a surfactant may be used. Alternatively, a plastic film having an aperture may be used.

  The absorbent core 22 is made of a mixture of a hydrophilic fiber (for example, pulverized pulp fiber or cellulose fiber) mixed with a granular water-absorbing polymer (for example, SAP (Super Absorbent Polymer)) such as a tissue paper or a liquid-permeable nonwoven fabric. It is formed by wrapping with a sheet and absorbs moisture that has passed through the top sheet 21 to quickly fix it. The cover sheet that wraps the hydrophilic fiber is bonded to the hydrophilic fiber and the water-absorbing polymer with a hot-melt adhesive to prevent the hydrophilic fiber from losing its shape and the water-absorbing polymer from falling off (especially after water absorption). To do.

  The back sheet 23 is a water-repellent or liquid-impervious plastic film, and prevents moisture that has permeated through the top sheet 21 and moisture that has been absorbed by the absorbent core 22 from exuding to the exterior sheet 24 side. . From the viewpoint of the wearer's comfort, a breathable plastic film is preferably used as the back sheet 23. As the back sheet 23, a water-repellent or liquid-impervious nonwoven fabric or a laminated sheet in which a water-repellent or liquid-impervious plastic film is laminated inside the nonwoven fabric may be used. Nonwoven fabrics used for the backsheet 23 are, for example, spunbond nonwoven fabrics, meltblown nonwoven fabrics, and SMS (spunbond / meltblown / spunbond) nonwoven fabrics, and may be subjected to water repellent treatment as necessary.

  The exterior sheet 24 is a water-repellent or liquid-impervious nonwoven fabric, and the left and right sides of the exterior sheet 24 in the front part 201 are joined to the left and right sides of the exterior sheet 24 in the rear part 203, respectively. The absorbent article 1 is formed in a pants shape. In addition, as the exterior sheet 24, a water-repellent or liquid-impervious plastic film or a laminated sheet of a plastic film and a nonwoven fabric may be used. From the viewpoint of improving the wearer's feel, the exterior sheet 24 is It is preferable to form with a nonwoven fabric.

  As shown in FIGS. 4 and 5, two elastic yarns 31 extending in the longitudinal direction are joined to each of the pair of side wall portions 3, and the absorbent article 1 is expanded as shown in FIG. Then, the elastic yarn 31 is in an extended state. In the absorbent article 1, the elastic yarn 31 contracts, so that the side wall portion 3 rises toward the wearer side on the side of the main body portion 2, and a three-dimensional gather that abuts near the base of the wearer's foot when worn is formed. Is done.

  The side wall 3 is formed of a water-repellent or liquid-impervious nonwoven fabric (for example, a spunbond nonwoven fabric, a melt blown nonwoven fabric, an SMS nonwoven fabric), a plastic film, or a composite material thereof. From the viewpoint of improving the comfort of the absorbent article 1, it is preferable that the side wall portion 3 has air permeability. As the elastic yarn 31, for example, a polyurethane yarn, a belt-like polyurethane film, a yarn-like or belt-like natural rubber, or the like is used.

  As shown in FIG. 1 to FIG. 3, the absorbent article 1 includes a body elastic member 41 that is joined to the main body 2 along the entire periphery of the body opening 11 along the edge of the body opening 11. Between the leg elastic member 42, the trunk elastic member 41, and the leg elastic member 42 along the respective edges of the pair of leg openings 12 and joined to the main body 2 over substantially the entire circumference of the leg opening 12. The front elastic member 43 joined to the front part 201 along the left-right direction (that is, the width direction), and the rear part 203 along the left-right direction between the body elastic member 41 and the leg elastic member 42. A rear elastic member 44 to be joined is further provided.

  The body elastic member 41 includes a plurality of elastic yarns. In the absorbent article 1, the plurality of elastic yarns are collectively referred to as the body elastic member 41. Similarly, the leg elastic member 42 includes a plurality of elastic yarns, and the plurality of elastic yarns are collectively referred to as the leg elastic member 42. The plurality of elastic yarns included in the body elastic member 41 and the leg elastic member 42 are coated on the exterior sheet 24 by hot melt adhesive or the like at the longitudinal ends of the front part 201 and the rear part 203 of the main body part 2. Glued to.

  Each of the front elastic member 43 and the rear elastic member 44 also includes a plurality of elastic yarns, and the plurality of elastic yarns are also bonded to the exterior sheet 24 by a hot melt adhesive or the like. At the portion where the front elastic member 43 and the rear elastic member 44 are joined, the exterior sheet 24 has a structure in which two nonwoven fabrics are laminated, and the front elastic member 43 and the rear elastic member 44 are the two sheets. Bonded between non-woven fabrics.

  In addition, the elastic yarn of the trunk | drum elastic member 41 is provided in the front part 201 and the rear part 203 separately similarly to the elastic yarn of the front part elastic member 43 and the back part elastic member 44.

  Examples of the plurality of elastic yarns included in the body elastic member 41, the leg elastic member 42, the front elastic member 43, and the rear elastic member 44 include, for example, polyurethane yarn, belt-like polyurethane film, yarn-like or belt-like natural rubber. Etc. are used. In the present embodiment, a plurality of polyurethane yarns that are thread-like members having a fineness of 300 to 2000 dtex are bonded to the main body 2 by a rubber-based hot melt adhesive. In addition, as a bonding method of the elastic yarn included in the body elastic member 41, the leg elastic member 42, the front elastic member 43, and the rear elastic member 44 to the main body 2, ultrasonic bonding, thermocompression bonding, or the like is employed. You can also However, from the viewpoint of simplification of production and the like, bonding with a hot melt adhesive is preferable.

  The trunk elastic member 41 and the leg elastic member 42 are stretched around the trunk opening 11 and the leg opening 12 over almost the entire circumference (preferably, 1.1 times to 5.0 times). The body part opening gathers and the leg part opening gathers are formed. Similarly, the front elastic member 43 and the rear elastic member 44 are also stretched in the front part 201 and the rear part 203 of the main body part 2 (preferably in a state of being stretched 1.1 times to 5.0 times), respectively. By joining and contracting, a front gather and a back gather are formed.

  As shown in FIGS. 1 and 2, the front elastic member 43 includes a first elastic thread group 431 including a plurality of elastic threads 4311, and a second elastic thread group 432 including a plurality of elastic threads 4321 below the first elastic thread group 431. And a third elastic yarn group 433 including a plurality of elastic yarns 4331 below the second elastic yarn group 432. In the present embodiment, each of the first elastic yarn group 431, the second elastic yarn group 432, and the third elastic yarn group 433 has only two elastic yarns. As shown in FIGS. 1 and 3, the rear elastic member 44, similarly to the front elastic member 43, includes a first elastic yarn group 441 including two elastic yarns 4411 and a second elasticity including two elastic yarns 4421. A yarn group 442 and a third elastic yarn group 443 including two elastic yarns 4431 are provided.

  In the first elastic yarn group 431 of the front elastic member 43 shown in FIG. 1, the elastic yarn 4311 located at the lower end is replaced with another elastic yarn 4311 in the first elastic yarn group 431 (in this embodiment, the elastic yarn located at the upper end). 4311) (that is, the cross-sectional area is large). Similarly, in the second elastic yarn group 432 of the front elastic member 43 and the first elastic yarn group 441 and the second elastic yarn group 442 of the rear elastic member 44, the elastic yarn positioned at the lower end of each elastic yarn group is elastic. Thicker than other elastic threads in the thread group.

  In addition, the elastic yarn 4311 positioned at the lower end of the first elastic yarn group 431 of the front elastic member 43 is thicker than the elastic yarn 4321 positioned at the upper end of the second elastic yarn group 432 and positioned at the lower end of the second elastic yarn group 432. The elastic yarn 4321 is thicker than the elastic yarn 4331 located at the upper end of the third elastic yarn group 433. Similarly, in the rear elastic member 44, the elastic yarn 4411 located at the lower end of the first elastic yarn group 441 is thicker than the elastic yarn 4421 located at the upper end of the second elastic yarn group 442, and is located at the lower end of the second elastic yarn group 442. The positioned elastic yarn 4421 is thicker than the elastic yarn 4431 positioned at the upper end of the third elastic yarn group 443.

  In the absorbent article 1 in a state worn by the wearer, the stretched body elastic member 41 contracts, so that the region in the vicinity of the body opening 11 is in close contact with the wearer's waist, and the leg elastic member 42 is By contracting, the site in the vicinity of the leg opening 12 is in close contact with the wearer's leg. Further, the front elastic member 43 and the rear elastic member 44 contract, whereby the front part 201 and the rear part 203 are brought into close contact with the wearer's stomach and back skin.

  In a state where the absorbent article 1 is worn by the wearer (that is, a state where the body elastic member 41, the leg elastic member 42, the front elastic member 43, and the rear elastic member 44 are extended), the front elastic member The first elastic thread group 431, the second elastic thread group 432, the third elastic thread group 433, and the first elastic thread group 441, the second elastic thread group 442, and the third elastic thread group 443 of the rear elastic member 44, respectively, The tension generated in the body elastic member 41 is smaller. For this reason, it can prevent that the adhesiveness with respect to the wearer of the front part 201 of the main-body part 2 and the back part 203 becomes large too much, and can make the wear feeling of the absorbent article 1 comfortable.

  As shown in FIG. 2, in the first elastic yarn group 431 of the front elastic member 43, two elastic yarns 4311 are arranged in the vertical direction perpendicular to the left-right direction with a spacing DS1, and in the second elastic yarn group 432, Two elastic yarns 4321 are arranged in the vertical direction at a distance DS2. Further, in the third elastic yarn group 433, two elastic yarns 4331 are arranged in the vertical direction at a distance DS3. As shown in FIG. 3, in the rear elastic member 44 as well, in the first elastic yarn group 441, the second elastic yarn group 442, and the third elastic yarn group 443, the distance between the two elastic yarns is DS1, DS2, DS3, respectively. Is done. The distances DS1, DS2, DS3 are 1 mm or more and 9 mm or less, and 7 mm in the present embodiment.

  In the front elastic member 43 shown in FIG. 2, the distance DL1 in the vertical direction between the elastic yarn 4311 at the lower end of the first elastic yarn group 431 and the elastic yarn 4321 at the upper end of the second elastic yarn group 432, and the second elastic yarn group The distance DL2 in the vertical direction between the elastic yarn 4321 at the lower end of 432 and the elastic yarn 4331 at the upper end of the third elastic yarn group 433 is larger than any of the intervals DS1, DS2, and DS3. Similarly, in the rear elastic member 44 shown in FIG. 3, the distance in the vertical direction between the elastic yarn 4411 at the lower end of the first elastic yarn group 441 and the elastic yarn 4421 at the upper end of the second elastic yarn group 442, and the second The distances in the vertical direction between the elastic yarn 4421 at the lower end of the elastic yarn group 442 and the elastic yarn 4431 at the upper end of the third elastic yarn group 443 are DL1, DL2, respectively, and the distances DL1, DL2 are the distances DS1, DS2, DS3. Greater than any of the above. The distances DL1 and DL2 are 10 mm or more and 20 mm or less, and 14 mm in the present embodiment.

  Moreover, in the absorbent article 1, as shown in FIGS. 2 and 3, the elastic yarns 4311 and 4411 at the upper ends of the first elastic yarn groups 431 and 441 of the front elastic member 43 and the rear elastic member 44 and the body elastic member Each distance DL3 in the vertical direction between the elastic yarns at the lower end of 41 is also larger than any of the distances DS1, DS2, DS3.

  When wearing the absorbent article 1, the legs are usually inserted from the trunk opening 11 into the leg opening 12, and then the thumbs of both hands are put inside the trunk opening 11 to open the trunk of the main body 2. 11 is grasped and the absorbent article 1 is pulled up to the waist. In the worn absorbent article 1, the front part elastic member 43 and the rear part elastic member 44 are provided on the front part 201 and the rear part 203 of the main body part 2, so that the front part elastic member 43 and the rear part elastic member 44 are provided. Compared with the absorbent article in which no is provided, the adhesion of the front part 201 and the rear part 203 of the main body part 2 to the wearer can be improved. As a result, it is possible to prevent the absorbent article 1 from being displaced and reliably prevent the excrement from leaking from the absorbent article 1.

  As described above, in the absorbent article 1, the distance DL1 between the lower end of the first elastic yarn group 431 and the upper end of the second elastic yarn group 432 in the front elastic member 43, and the lower end of the second elastic yarn group 432 and the second end. The distance DL2 between the upper ends of the three elastic yarn groups 433 is larger than any of the intervals DS1, DS2, DS3 of the plurality of elastic yarns in each of the first elastic yarn group 431, the second elastic yarn group 432, and the third elastic yarn group 433. . When the absorbent article 1 is worn, the fingertips of both hands are positioned between the first elastic thread group 431 and the second elastic thread group 432, or between the second elastic thread group 432 and the third elastic thread group 433. By grasping the front part 201 of the main body part 2, the fingertip can be deeply hooked on the main body part 2, and the main body part 2 can be firmly held even with a small gripping force. As a result, the absorbent article 1 can be easily pulled up toward the waist, and the absorbent article 1 can be easily worn.

  Further, in the absorbent article 1, the distance DL1 between the lower end of the first elastic yarn group 441 and the upper end of the second elastic yarn group 442 in the rear elastic member 44, and the lower end of the second elastic yarn group 442 and the third elastic yarn group. A distance DL2 from the upper end of 443 is larger than any one of the plurality of elastic yarn intervals DS1, DS2, and DS3 in each of the first elastic yarn group 441, the second elastic yarn group 442, and the third elastic yarn group 443. For this reason, the fingertips of both hands are positioned between the first elastic thread group 441 and the second elastic thread group 442 or between the second elastic thread group 442 and the third elastic thread group 443, and the rear part 203 of the main body part 2 is moved. It can be firmly grasped. Thus, in the absorbent article 1, since both the front part 201 and the rear part 203 of the main-body part 2 can be firmly grasped at the time of wear, it is easier to wear the absorbent article 1. it can.

  Here, in the front elastic member 43 and the rear elastic member 44, the distance DL1, DL2 between the first to third elastic yarn groups is set to 10 mm or more, so that the fingertip can be placed between the elastic yarn groups in the main body portion. 2 can be easily hooked to the body 2, so that the main body 2 can be gripped more firmly and the absorbent article 1 can be more easily worn. Further, by setting the distances DL1 and DL2 to 20 mm or less, the arrangement of the plurality of elastic yarns included in the front elastic member 43 and the rear elastic member 44 can be prevented from becoming unnecessarily sparse. Thereby, the adhesiveness to the wearer of the main-body part 2 by shrinkage | contraction of the front part elastic member 43 and the back part elastic member 44 can be maintained in a suitable range.

  Further, in the front elastic member 43 and the rear elastic member 44, the intervals DS1, DS2, DS3 of the plurality of elastic yarns in each elastic yarn group are set to 1 mm or more, so that the plurality of elastic yarns are arranged in each elastic yarn group. It can prevent becoming denser than necessary. Thereby, in manufacture of the absorbent article 1, it prevents that the elastic yarn group which adjoins elastic yarns by influence of meandering etc. in the middle of manufacture, and influences a wearer's skin locally is made. Therefore, it is not necessary to perform special control for preventing meandering and the like, the attachment of the plurality of elastic yarns to the main body 2 can be easily performed, and the manufacture of the absorbent article 1 is simplified. Can do. The distances DS1, DS2, DS3 are more preferably 3 mm or more. Further, by setting the distances DS1, DS2, DS3 to 9 mm or less, it is possible to prevent the plurality of elastic yarns included in the front elastic member 43 and the rear elastic member 44 from becoming unnecessarily sparse. it can. Thereby, the adhesiveness to the wearer of the main-body part 2 can be maintained in an appropriate range.

  In each of the front elastic member 43 and the rear elastic member 44, the three elastic yarn groups are provided at a distance larger than the intervals DS1, DS2, DS3 of the plurality of elastic yarns of each elastic yarn group. As described above, in the absorbent article 1, a plurality of portions between the elastic yarn groups (that is, portions where fingertips are easily hooked) are provided in the vertical direction in each of the front portion 201 and the rear portion 203 of the main body portion 2. The wearing of the property article 1 can be further facilitated.

  Further, in the front elastic member 43 and the rear elastic member 44, since each elastic yarn group includes only two elastic yarns, the distances DS1, DS2, DS3 and the distances DL1, DL2, which are larger than the distances DS1, DS2, DS3, and Are arranged alternately. Thereby, since a fingertip can be hooked still more easily in the site | part between elastic yarn groups, wear of the absorbent article 1 can be made still easier.

  In the front elastic member 43 and the rear elastic member 44, the cross-sectional areas of the elastic yarns located at the lower ends of the first elastic yarn groups 431, 441 and the second elastic yarn groups 432, 442 are the elastic yarn groups including the elastic yarns. It is larger than the cross-sectional area of the other elastic yarn and the cross-sectional area of the elastic yarn located at the upper end of the other elastic yarn group adjacent to the lower side of the elastic yarn. Thus, by making the cross-sectional area of the elastic yarn located at the upper edge of the portion between the elastic yarn groups larger than the cross-sectional area of the other elastic yarns arranged around (that is, increasing the fineness), Since it is possible to easily find the position where the fingertip is hooked based on the feeling transmitted to the fingertip when grasping the main body 2, and to easily apply force to the fingertip when the absorbent article 1 is pulled up to the waist, the absorbent article The wearing of 1 can be made even easier.

  In the absorbent article 1, the main body 2 may be grasped by hooking a fingertip on the lower part of the third elastic yarn group 433 443 of the main body 2. In this case, it is preferable that the cross-sectional area of the elastic yarns positioned at the lower ends of the third elastic yarn groups 433 and 443 is larger than the cross-sectional areas of the other elastic yarns included in the third elastic yarn groups 433 and 443.

  In the absorbent article 1, in the front part 201 and the rear part 203 of the main body part 2, the distance between the lower end of the body elastic member 41 and the upper end of the first elastic thread group is larger than the distance between the elastic threads in each elastic thread group. Increased. As a result, when the absorbent article 1 is worn, the fingertip can be hooked on the portion between the trunk elastic member 41 and the first elastic yarn groups 431 and 441 as necessary. Can be made even easier.

  Next, an absorbent article 1a according to a second embodiment of the present invention will be described. 6 and 7 are a front view and a rear view of the absorbent article 1a. As shown in FIGS. 6 and 7, the absorbent article 1a has a trunk opening 11 at the upper end (that is, the upper end in FIGS. 6 and 7), as in the first embodiment. A pants-type disposable diaper having a pair of leg openings 12 at the lower end. In the absorbent article 1a, unlike the absorbent article 1 shown in FIGS. 1 to 3, the front elastic member 43a and the rear elastic member 44a each include only two elastic yarn groups. Other configurations are the same as those in FIGS. 1 to 3, and the same reference numerals are given in the following description.

  As shown in FIGS. 6 and 7, the absorbent article 1 a includes the main body 2, the body elastic member 41, and the leg elastic member 42 as in the first embodiment. The absorbent article 1a also includes a front elastic member 43a joined to the front part 201 of the main body 2 along the left-right direction (that is, the width direction) between the trunk elastic member 41 and the leg elastic member 42. In addition, a rear elastic member 44a is further provided between the body elastic member 41 and the leg elastic member 42 and joined to the rear portion 203 of the main body 2 along the left-right direction.

  As shown in FIG. 6, the front elastic member 43 a includes a first elastic thread group 431 including a plurality of elastic threads 4311, and a second elastic thread group 432 including a plurality of elastic threads 4321 below the first elastic thread group 431. Prepare. In the present embodiment, each of the first elastic yarn group 431 and the second elastic yarn group 432 has three elastic yarns (polyurethane yarn). As shown in FIG. 7, similarly to the front elastic member 43a, the rear elastic member 44a also includes a first elastic yarn group 441 including three elastic yarns 4411 and a second elastic yarn group including three elastic yarns 4421. 442. In the front elastic member 43a and the rear elastic member 44a, the elastic yarn located at the lower end of the first elastic yarn group is located at the other two elastic yarns of the first elastic yarn group and the upper end of the second elastic yarn group. Thicker than elastic yarn.

  In the state where the absorbent article 1a shown in FIGS. 6 and 7 is worn by the wearer, as in the first embodiment, the first elastic yarn group 431 and the second elastic yarn group 432 of the front elastic member 43a, and The tension generated in the first elastic thread group 441 and the second elastic thread group 442 of the rear elastic member 44 a is smaller than the tension generated in the body elastic member 41. For this reason, it can prevent that the adhesiveness with respect to the wearer of the front part 201 of the main-body part 2 and the back part 203 becomes large too much, and can make the wear feeling of the absorbent article 1a comfortable.

  As shown in FIG. 6, in the first elastic yarn group 431 of the front elastic member 43a, three elastic yarns 4311 are arranged in the vertical direction at a distance DS1, and in the second elastic yarn group 432, three elastic yarns are arranged. The yarns 4321 are arranged in the vertical direction at the interval DS2. As shown in FIG. 7, in the rear elastic member 44a as well, in the first elastic yarn group 441 and the second elastic yarn group 442, the intervals between the three elastic yarns are DS1 and DS2, respectively. The distances DS1 and DS2 are 1 mm or more and 9 mm or less, and 7 mm in the present embodiment.

  In the front elastic member 43a shown in FIG. 6, the distance DL1 in the vertical direction between the elastic yarn 4311 at the lower end of the first elastic yarn group 431 and the elastic yarn 4321 at the upper end of the second elastic yarn group 432 is the distance DS1, DS2. Greater than any of the above. Similarly, in the rear elastic member 44a shown in FIG. 7, the distance in the vertical direction between the elastic yarn 4411 at the lower end of the first elastic yarn group 441 and the elastic yarn 4421 at the upper end of the second elastic yarn group 442 is DL1, The distance DL1 is larger than both the distances DS1 and DS2. The distance DL1 is 10 mm or more and 20 mm or less, and is 14 mm in the present embodiment.

  Moreover, in the absorbent article 1a, as shown in FIGS. 6 and 7, the elastic yarns 4311 and 4411 at the upper ends of the first elastic yarn groups 431 and 441 of the front elastic member 43a and the rear elastic member 44a and the trunk elastic member Each distance DL3 in the vertical direction between the elastic yarns at the lower end of 41 is also larger than any of the distances DS1 and DS2.

  In the absorbent article 1a, the front part elastic member 43a and the rear part elastic member 44a improve the adhesion of the front part 201 and the rear part 203 of the main body part 2 to the wearer as in the first embodiment. Can do. Further, in the front elastic member 43a and the rear elastic member 44a, the distance DL1 between the lower ends of the first elastic yarn groups 431 and 441 and the upper ends of the second elastic yarn groups 432 and 442 is set to the first elastic yarn groups 431 and 441 and The distance between the plurality of elastic yarns DS1 and DS2 in each of the second elastic yarn groups 432 and 442 is made larger. Therefore, as in the first embodiment, when the absorbent article 1a is worn, between the first elastic yarn group 431 and the second elastic yarn group 432 of the main body 2 or the first elastic yarn group 441, A fingertip can be deeply hooked between the second elastic yarn group 442 and the absorbent article 1a can be easily worn.

  In the absorbent article 1a, similarly to the first embodiment, by setting the distance DL1 to 10 mm or more and 20 mm or less, the absorbent article 1a can be further easily worn and to the wearer of the main body 2. Can be maintained in an appropriate range. Further, by setting the distances DS1 and DS2 to 1 mm or more and 9 mm or less, it is possible to simplify the manufacture of the absorbent article 1a and to maintain the adhesion of the main body 2 to the wearer within an appropriate range. .

  In the front elastic member 43a and the rear elastic member 44a, the cross-sectional area of the elastic yarn located at the lower end of each of the first elastic yarn groups 431 and 441 is the cross-sectional area of the other elastic yarns in the elastic yarn group including the elastic yarn. And the cross-sectional area of the elastic yarn located at the upper end of the second elastic yarn group 432, 442 is made larger. Thereby, similarly to 1st Embodiment, the position which hooks a fingertip can be easily found based on the touch transmitted to a fingertip at the time of wear of the absorbent article 1a, and also the absorbent article 1 is pulled up to the waist side. At this time, since it is easy to put force on the fingertip, it is possible to make the absorbent article 1a even easier to wear.

  In the absorbent article 1a, the distance between the lower end of the body elastic member 41 and the upper end of the first elastic yarn group in the front part 201 and the rear part 203 of the main body part 2 is the same as in the first embodiment. By making it larger than the interval between the elastic yarns in each elastic yarn group, when the absorbent article 1a is worn, the fingertips may be placed on the portion between the body elastic member 41 and the first elastic yarn groups 431 and 441 as necessary. Therefore, it is possible to make it easier to wear the absorbent article 1a.

  Next, an absorbent article 1b according to a third embodiment of the present invention will be described. 8 and 9 are a front view and a rear view of the absorbent article 1b. As shown in FIGS. 8 and 9, the absorbent article 1b has a trunk opening 11 at the upper end (that is, the upper end in FIGS. 8 and 9), as in the first embodiment. , A pants-type disposable diaper having a pair of leg openings 12 at the lower end, between the main body 2, the trunk elastic member 41 and the leg elastic member 42, and between the trunk elastic member 41 and the leg elastic member 42. , The front elastic member 43b joined to the front part 201 of the main body 2 along the left-right direction (that is, the width direction), and the body elastic member 41 and the leg elastic member 42 along the left-right direction. The rear part elastic member 44b joined to the rear part 203 of the main-body part 2 is provided.

  However, unlike the absorbent article 1 shown in FIGS. 1 to 3, each of the front elastic member 43b and the rear elastic member 44b includes three elastic yarns (polyurethane yarns). In the following description, the three elastic yarns included in the front elastic member 43b are referred to as “first elastic yarn 4301”, “second elastic yarn 4302”, and “third elastic yarn 4303” from the upper side to the lower side. The three elastic yarns included in the rear elastic member 44b are referred to as “first elastic yarn 4401”, “second elastic yarn 4402”, and “third elastic yarn 4403” from the upper side to the lower side. Other configurations are the same as those in FIGS. 1 to 3, and the same reference numerals are given in the following description.

  As shown in FIG. 8, in the front elastic member 43b, the distance DL4 related to the vertical direction between the first elastic thread 4301 and the second elastic thread 4302 is related to the vertical direction between the second elastic thread 4302 and the third elastic thread 4303. It is made larger than the distance DL5. Also in the rear elastic member 44b shown in FIG. 9, the distance DL4 in the vertical direction between the first elastic yarn 4401 and the second elastic yarn 4402 is the same as that of the second elastic yarn 4402 and the third elastic member 44b. It is made larger than the distance DL5 in the vertical direction with the elastic yarn 4403. In the absorbent article 1b, the distance DL4 is 10 mm or more and 20 mm or less (14 mm in this embodiment), and the distance DL5 is 1 mm or more and 9 mm or less (7 mm in this embodiment). In the front elastic member 43b and the rear elastic member 44b, the cross-sectional areas of the first elastic threads 4301 and 4401 are larger than the cross-sectional areas of the adjacent second elastic threads 4302 and 4402, respectively.

  In the absorbent article 1b, the second elastic yarn 4302 and the third elastic yarn 4303 of the front elastic member 43b are gathered together, and the distance is smaller than the distance DL4 between the first elastic yarn 4301 and the first elastic yarn 4301. It can be regarded as a group of elastic yarns arranged in the vertical direction (that is, distance DL5). In addition, the second elastic yarn 4402 and the third elastic yarn 4403 of the rear elastic member 44b are put together in the vertical direction at a distance DL5 that is lower than the distance DL4 between the first elastic yarn 4401 and the first elastic yarn 4401. It can be regarded as a group of elastic yarns arranged in the direction.

  In the absorbent article 1b, as shown in FIGS. 8 and 9, between the first elastic yarns 4301 and 4401 of the front elastic member 43b and the rear elastic member 44b and the elastic yarn at the lower end of the body elastic member 41, as shown in FIGS. Each distance DL6 in the vertical direction is larger than the distance DL5.

  In the state where the absorbent article 1b is worn by the wearer, the tension generated in the front elastic member 43b and the rear elastic member 44b is greater than the tension generated in the trunk elastic member 41, as in the first embodiment. Is also small. For this reason, it can prevent that the adhesiveness with respect to the wearer of the front part 201 and the back part 203 of the main-body part 2 becomes large too much, and the wearing feeling of the absorbent article 1b can be made comfortable.

  In the absorbent article 1b, the front part elastic member 43b and the rear part elastic member 44b improve the adhesion of the front part 201 and the rear part 203 of the main body part 2 to the wearer as in the first embodiment. Can do. In the front elastic member 43b and the rear elastic member 44b, the distance DL4 between the first elastic yarns 4301 and 4401 and the second elastic yarns 4302 and 4402 is equal to the second elastic yarns 4302 and 4402 and the third elastic yarns. It is made larger than the distance DL5 between 4303 and 4403. For this reason, when the absorbent article 1b is worn, the fingertip between the first elastic yarn 4301 and the second elastic yarn 4302 of the main body 2 or between the first elastic yarn 4401 and the second elastic yarn 4402. Can be hooked deeply, and the absorbent article 1b can be easily worn as in the first embodiment.

  In particular, by setting the distance DL4 to 10 mm or more and 20 mm or less, the absorbent article 1b can be more easily worn and the adhesion of the main body 2 to the wearer can be maintained in an appropriate range. Moreover, by making the distance DL5 1 mm or more and 9 mm or less, the manufacturing of the absorbent article 1b can be simplified, and the adhesion of the main body 2 to the wearer can be maintained in an appropriate range.

  In the absorbent article 1b, the distance DL6 between the lower end of the body elastic member 41 and the first elastic yarns 4301 and 4401 of the front elastic member 43b and the rear elastic member 44b is set larger than the distance DL5. Accordingly, when the absorbent article 1b is worn, the fingertip can be hooked on the portion between the body elastic member 41 and the first elastic threads 4301 and 4401 as necessary, so that the absorbent article 1b is worn. Can be made even easier.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

  For example, in the absorbent articles according to the first and second embodiments, the number of elastic yarns included in each elastic yarn group may be four or more.

  In the absorbent article 1 according to the first embodiment, only one of the front elastic member 43 or the rear elastic member 44 includes three elastic yarn groups, and the elastic yarn groups adjacent to each other in the three elastic yarn groups. The distances DL1 and DL2 may be larger than any of the intervals DS1, DS2 and DS3 between the plurality of elastic yarns included in each elastic yarn group. Similarly, in the absorbent article 1a according to the second embodiment, only one of the front elastic member 43a or the rear elastic member 44a includes two elastic yarn groups, and the distance DL1 between the two elastic yarn groups is the same. However, it may be larger than any of the intervals DS1 and DS2 between the plurality of elastic yarns included in each elastic yarn group. In the absorbent article 1b according to the third embodiment, the distance DL4 between the first elastic yarn and the second elastic yarn is the second elasticity only in one of the front elastic member 43b and the rear elastic member 44b. The distance DL5 between the yarn and the third elastic yarn may be larger. In any case, the absorbent article can be easily worn.

It is a figure which shows the external appearance of the absorbent article which concerns on 1st Embodiment. It is a front view of an absorptive article. It is a rear view of an absorbent article. It is the top view seen from the wearer side in the state which developed the absorptive article. It is sectional drawing of an absorbent article. It is a front view of the absorptive article concerning a 2nd embodiment. It is a rear view of an absorbent article. It is a front view of the absorptive article concerning a 3rd embodiment. It is a rear view of an absorbent article.

Explanation of symbols

1, 1a, 1b Absorbent article 2 Body portion 11 Trunk opening 12 Leg opening 41 Trunk elastic member 42 Leg elastic member 43, 43a, 43b Front elastic member 44, 44a, 44b Rear elastic member 201 Front portion 202 Middle part 203 Rear part 431,441 1st elastic thread group 432,442 2nd elastic thread group 433,443 3rd elastic thread group 4301,4401 1st elastic thread 4302,4402 2nd elastic thread 4303,4403 3rd elastic thread 4311, 4321, 4331, 4411, 4421, 4431 Elastic thread

Claims (9)

A pants-type absorbent article having a trunk opening at the upper end and a pair of leg openings at the lower end,
Folded at the middle part between the front part and the rear part in contact with the skin on the abdomen and back side of the wearer, the left and right sides of the front part when the middle part is directed downward are the rear part A body part joined to each of the left and right sides of the
A trunk elastic member that forms a trunk opening gather by being contracted while being joined to the main body along the edge of the trunk opening;
A leg elastic member which forms a leg opening gather by being joined to the main body part and contracting along the respective edges of the pair of leg openings;
A front elastic member that forms a front gather by joining and contracting along the left-right direction between the trunk elastic member and the leg elastic member;
A rear elastic member that forms a rear gather by being joined to the rear part along the left-right direction and contracting between the body elastic member and the leg elastic member;
With
The main body is
An absorbent core;
A top sheet covering the main surface of the absorbent core on the wearer side;
An exterior sheet;
With
At least one of the front elastic member and the rear elastic member is
A first elastic yarn group in which a plurality of elastic yarns are arranged at a first interval in a vertical direction perpendicular to the left-right direction;
A second elastic yarn group in which a plurality of elastic yarns are arranged at a second interval in the vertical direction below the first elastic yarn group;
With
The absorbent core is positioned below the second elastic yarn group;
The absorbent article, wherein a distance in the vertical direction between a lower end of the first elastic yarn group and an upper end of the second elastic yarn group is larger than both the first interval and the second interval. . The absorbent article according to claim 1,
The first interval and the second interval are 1 mm or more and 9 mm or less, and the distance between the lower end of the first elastic yarn group and the upper end of the second elastic yarn group is 10 mm or more and 20 mm or less. Absorbent article characterized by. The absorbent article according to claim 1 or 2,
An absorbent article, wherein a tension generated in each of the first elastic yarn group and the second elastic yarn group in a state worn by a wearer is smaller than a tension generated in the body elastic member. The absorbent article according to any one of claims 1 to 3,
The cross-sectional area of the elastic yarn located at the lower end of the first elastic yarn group is larger than the cross-sectional area of the other elastic yarns of the first elastic yarn group and the elastic yarn located at the upper end of the second elastic yarn group. Absorbent article characterized. The absorbent article according to any one of claims 1 to 4,
The distance between the lower end of the first elastic yarn group and the upper end of the second elastic yarn group is at least one of the front elastic member and the rear elastic member below the second elastic yarn group. Further comprising a third elastic yarn group in which a plurality of elastic yarns are arranged in the vertical direction at a small third interval,
The absorbent core is positioned below the third elastic yarn group,
The distance in the vertical direction between the lower end of the second elastic yarn group and the upper end of the third elastic yarn group is greater than any of the first interval, the second interval, and the third interval. Absorbent article characterized. The absorbent article according to claim 5,
The absorbent article, wherein each of the first elastic yarn group, the second elastic yarn group, and the third elastic yarn group includes only two elastic yarns. The absorbent article according to any one of claims 1 to 6,
The absorbent article, wherein a distance in the vertical direction between an upper end of the first elastic yarn group and a lower end of the body elastic member is larger than both the first interval and the second interval. . The absorbent article according to any one of claims 1 to 7,
Each of the said front part elastic member and the said back part elastic member is provided with the said 1st elastic thread group and the said 2nd elastic thread group, The absorbent article characterized by the above-mentioned. A pants-type absorbent article having a trunk opening at the upper end and a pair of leg openings at the lower end,
Folded at the middle part between the front part and the rear part in contact with the skin on the abdomen and back side of the wearer, the left and right sides of the front part when the middle part is directed downward are the rear part A body part joined to each of the left and right sides of the
A trunk elastic member that forms a trunk opening gather by being contracted while being joined to the main body along the edge of the trunk opening;
A leg elastic member which forms a leg opening gather by being joined to the main body part and contracting along the respective edges of the pair of leg openings;
A front elastic member that forms a front gather by joining and contracting along the left-right direction between the trunk elastic member and the leg elastic member;
A rear elastic member that forms a rear gather by being joined to the rear part along the left-right direction and contracting between the body elastic member and the leg elastic member;
With
The main body is
An absorbent core;
A top sheet covering the main surface of the absorbent core on the wearer side;
An exterior sheet;
With
At least one of the front elastic member and the rear elastic member is
A first elastic thread;
Below the first elastic yarn, a second elastic yarn disposed at a first distance from the first elastic yarn in the vertical direction perpendicular to the left-right direction;
Below the second elastic yarn, a third elastic yarn disposed at a second distance smaller than the first distance from the second elastic yarn in the vertical direction;
Equipped with a,
An absorbent article , wherein the absorbent core is positioned below the third elastic yarn .

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