JP6385311B2 - Disposable wearing articles - Google Patents

Description

  The present invention relates to a disposable wearing article.

  Conventionally, disposable wearing articles having a front and rear waist region, a crotch region, a waist opening and a pair of leg openings are known. For example, Patent Document 1 discloses a wearing article having a front and rear waist region, a crotch region, a waist opening and a pair of leg openings, and the side edges of the front and rear waist regions are discontinuous in the vertical direction. Are joined to each other in a side joining region where a plurality of joining portions extending in the position are located. In the side joint region, the plurality of joint portions extend linearly in the lateral direction.

JP 2010-220781 A

  The wearing article of patent documents 1 has the 1st area where the separation size of a joined part is large compared with other areas on the waist opening side of a side joined area. In such a wearing article, when the wearing article is pulled up during the wearing operation, the pulling operation is easily performed by placing a finger on the first area.

  However, in the first area, since the bonding strength is weaker than in other areas, it is easy to break, and when tearing occurs in the wearing operation, the side area is continuously linear in the lateral direction. There is a risk that the side edge portions of the front and rear waist regions will be inadvertently torn along the joints extending in the direction.

  Accordingly, an object of the present invention is to provide a disposable wearing article that is an improvement of the conventional technique, can be easily pulled up, and can prevent side edges of the front and rear waist regions from being inadvertently torn. is there.

  In order to achieve the above object, the present invention is directed to the longitudinal and lateral directions, the front waist region, the rear waist region, the crotch region positioned between the front and rear waist regions, the waist opening, and A disposable wearing article including a pair of leg openings.

(Invention of Claim 1)
In the above-mentioned wearing article, at least one side edge of the front and back waist region is joined to each other via a side joint region where a plurality of joints extending discontinuously in the longitudinal direction are located, and the side joint region Has a first section located on the waist opening side, and the joint portion includes a first joint portion located on the inner side in the lateral direction, a second joint portion located on the outer side in the lateral direction, A third joint located between the first joint and the second joint in the lateral direction; and in the first section, the first joint is different in the vertical separation dimension. And extending in the first direction inclined toward the crotch region side from the inner side to the outer side in the lateral direction, and the second joint portion and the third joint portion are the first joint. Is located on the crotch region side of the portion, and the second joint portion , Extending in the second direction inclined toward the crotch region side from the outside in the lateral direction to the inside, and the third joint portion extends in the second direction and does not extend in the first direction. It is characterized by.

  In such a worn article, in the first area, the vertical separation dimension of the first joint portion is larger than that in the other areas, so that it is soft and easy to pull up with a finger. After use, the side joint area can be easily torn by the first joint, and the side joint area can be prevented from being inadvertently torn by the second and third joints during the wearing operation or during wearing. .

(Invention of Claim 2)
In the above-mentioned wearing article, the first area is located on the crotch region side adjacent to the first row, in which the first joint is disposed and the third joint is not disposed. A plurality of second rows in which the second and third joint portions are disposed and the first joint portions are not disposed are disposed in the vertical direction.

  In such a wearing article, when a tear occurs along the first joint portion, the tear can be suppressed by the second and third joint portions extending in the second direction in the second row.

(Invention of Claim 3)
In the worn article, in the first row, one first joint portion is disposed, and in the second row, the second joint portion and the third joint portion are arranged in the second direction. It is arranged with.

  Such a wearing article is highly effective in preventing inadvertent tearing in the first area.

(Invention of Claim 4)
In the first section, the first joint portion and the third joint portion have the same separation dimension in the longitudinal direction.

  In such a worn article, tearing can be prevented while increasing the flexibility of the side joint area.

(Invention of Claim 5)
In the first section, a separation dimension in the longitudinal direction of the second joint portion is smaller than a separation dimension in the longitudinal direction of the first joint portion.

  Such a wearing article is highly effective in preventing tearing.

(Invention of Claim 6)
In the first section, the first joint, the second joint, and the third joint are displaced from each other in the longitudinal direction.

  In such a wearing article, tearing in the lateral direction can be effectively prevented.

(Invention of Claim 7)
The side joint region includes an inner region where the first joint portion is located, an outer region where the second joint portion is located, and an intermediate region where the third joint portion is located, and at least the first region. The inner region can be elastically expanded and contracted in the lateral direction.

  In such a wearing article, the front and rear waist regions are easy to open in the front-rear direction, and the wearing operation is easy. In addition, the joint becomes inconspicuous in appearance and the aesthetic appearance is improved.

(Invention of Claim 8)
In the side joining area, the first area has the largest number of laminated sheet members.

  In such a worn article, it is possible to reduce irritation by improving the feel in the vicinity of the waist opening.

(Invention of Claim 9)
The side junction area is located adjacent to the first area on the crotch area side, and has a second area in which a ratio of the junction per unit area is higher than the first area. The separation dimension of the third joint portion adjacent in the longitudinal direction in two zones is smaller than the separation dimension of the third joint portion adjacent in the longitudinal direction in the first zone.

  In such a wearing article, the side joining area is easily torn after use. Moreover, it can prevent that a side junction area is torn carelessly at the time of wearing operation or during wearing.

(Invention of Claim 10)
In the second section, the third joint includes a first slope joint extending in the first direction and a second slope joint extending in the second direction.

  In such a worn article, tearing can be induced to facilitate tearing when tearing the side joint area after use of the worn article while preventing tearing during wearing.

(Invention of Claim 11)
The upper end portion in the vertical direction of the second section has a larger number of stacked sheet members than the lower end portion.

  In such a wearing article, variation in bonding strength can be suppressed.

(Invention of Claim 12)
The side junction area further includes a third area located on the crotch area side with respect to the second area, and the second area and the third area have an arrangement pattern of at least the third junction portion. Different.

  In such a worn article, it is possible to prevent inadvertent tearing and to easily tear the side joint area intentionally in the disposal process.

(Invention of Claim 13)
The front-rear waist region has an elastic region that can elastically expand and contract in the lateral direction, and the third elastic region is located in the outer elastic region in which the first region is located in the longitudinal direction. The elongation stress at a predetermined width is lower than that of the inner elastic region.

  In such a wearing article, it is easy to pull up the wearing article by grasping the first area.

  According to the disposable wearing article according to the present invention, the pulling-up operation is easy, and the side joining area can be prevented from being inadvertently torn.

The drawings illustrate specific embodiments of the invention and include selective and preferred embodiments as well as the essential features of the invention.
The perspective view of the disposable diaper shown as an example of the disposable wearing article which concerns on this invention. The partial fracture | rupture expansion | deployment top view of the diaper extended in the vertical direction and the horizontal direction until the maximum expansion | extension of each elastic body (to the extent that the gathers by the contraction effect | action of an elastic material are lost). The disassembled perspective view of the diaper shown in FIG. FIG. 4 is a partially enlarged view showing a region surrounded by an alternate long and short dash line IV in FIG. 1. (A) is typical sectional drawing which follows the Va-Va line | wire of FIG. (B) is typical sectional drawing which follows the Vb-Vb line | wire of FIG. FIG. 4C is a partially enlarged view showing a region surrounded by an alternate long and short dash line IV in FIG. 1. (A) The elements on larger scale which show the area | region enclosed with the dashed-dotted line VIa in FIG. (B) The figure which shows the 1st area of the conventional diaper. FIG. 5 is a partially enlarged view showing a region surrounded by an alternate long and short dash line VII in FIG. 4. FIG. 5A is a partially enlarged view showing a region surrounded by an alternate long and short dash line VIIIa in FIG. FIG. 5B is a partially enlarged view showing a region surrounded by an alternate long and short dash line VIIIb in FIG. 4.

  The following embodiment relates to the disposable wearing article shown in FIGS. 1 to 8 as an example of the present invention, and includes not only an indispensable structure of the invention but also a selective and preferable structure. 2 and 3, each elastic body to be described later has a natural gather on the member to which each elastic body is attached by the contracting force in the lateral direction X and the longitudinal direction Y against the contracting force. It is in a state of being stretched to such an extent that it appears to be substantially lost visually.

  1-3, the disposable diaper 10 which is an example of the disposable wearing article which concerns on this invention is the horizontal direction X which cross | intersects the orthogonal | vertical direction Y and it crosses (orthogonal), the skin opposing surface, and the non-opposite side. It has a skin facing surface, a vertical axis P that bisects the length dimension in the horizontal direction X, and a horizontal axis Q that bisects the length dimension in the vertical direction Y, and is substantially symmetrical with respect to the vertical axis P. The front waist region 11, the rear waist region 12, and the crotch region 13 located between the front waist region 11 and the rear waist region 12 are included.

  The diaper 10 includes a chassis 14 in the form of a base, and the chassis 14 has a concave curved shape on both side edges that define the crotch region 13. The front side edges 11a and 11b of the front waist region 11 and the rear side edges 12a and 12b of the rear waist region 12 are overlapped so as to face each other in the front-rear direction of the diaper 10 and extend discontinuously in the vertical direction Y. They are joined to each other via the side joining area 22 where the joining portion 30 is located. Thus, the waist opening 23 and a pair of leg opening 24 are demarcated by connecting the front and rear side edge parts 11a, 11b, 12a, and 12b. In the joint portion 30, the overlapping sheets are fused together by a known means such as embossing / debossing by heat or ultrasonic waves.

<Chassis>
The chassis 14 is located on the skin facing surface, is located on the non-skin facing surface side, and is separated from each other in the longitudinal direction Y, with the base sheet 25 made of a fiber nonwoven fabric defining the front and rear waist regions 11 and 12 and the crotch region 13 in series. The front waist sheet 26 and the rear waist sheet 27 made of a nonwoven fabric are opposed to each other, and the liquid absorbing structure 15 is located on the skin facing surface side of the base sheet 25 and extends from the crotch region 13 to the front and rear waist regions 11 and 12. .

  The base sheet 25 includes first and second end edges 25a and 25b that are spaced apart in the vertical direction Y, and both side edges 25c and 25d that are spaced apart in the horizontal direction X. Both side edges 25c and 25d are a straight portion in the front and rear waist regions 11 and 12, and a curved portion that protrudes deeper from the rear waist region 12 side toward the front waist region 11 side toward the vertical axis P in the crotch region 13. Formed from.

  The front waist seat 26 has a substantially trapezoidal shape that forms the front waist region 11 and a part of the crotch region 13, and extends in the longitudinal direction Y, with an intermediate inner edge 26 a and an outer edge 26 b extending in the lateral direction X. Both outer edges 26c and 26d, and both inner edges 26e and 26f connecting both outer edges 26c and 26d and the intermediate inner edge 26a are formed. The inner side edges 26e and 26f on both sides have a straight part extending straight from the outer edges 26c and 26d in the lateral direction X and a curved part extending from the straight part to the intermediate inner edge 26a. The front waist sheet 26 has a bent portion 28 that is bent inward along the waist opening edge. The bent portion 28 is bent inward along the first end edge 25a of the base sheet 25 in a state where the liquid absorbing structure 15 is disposed on the inner surface of the base sheet 25, and the base sheet 25 and the liquid absorbing structure 15 are thus bent. Fixed to the skin facing surface.

  The rear waist sheet 27 has a substantially trapezoidal shape that forms the rear waist region 12 and a part of the crotch region 13, and extends from the intermediate inner edge 27a and the outer edge 27b extending in the lateral direction X, and from the outer edge 27b. Both outer edges 27c, 27d extending in the vertical direction Y, and both inner edges 27e, 27f connecting the outer edges 27c, 27d and the intermediate inner edge 27a in a curved shape are formed. The rear waist sheet 27 has a bent portion 29 that is bent inward along the waist opening edge. The bent portion 29 is bent inward along the second end edge 25b of the base sheet 25 in a state where the liquid absorbing structure 15 is disposed on the inner surface of the base sheet 25, and the base sheet 25 and the liquid absorbing structure 15 are thus bent. Fixed to the skin facing surface.

The base sheet 25 and the front and rear waist sheets 26 and 27 have a mass of about 10 to 40 g / m ² and a fiber density of about 0.03 to 0.10 g / cm ³ , for example, spunbond fiber nonwoven fabric, SMS (Spunbond / meltblown / spunbond) A fiber nonwoven fabric, an air-through fiber nonwoven fabric, a plastic sheet, or a laminate sheet thereof can be used. In the present embodiment, the base sheet 25 has a mass of about 10 to 18 g / m ² , preferably a mass of about 15 g / m ² , and the front and back waist sheets 26 and 27 have a mass of about 15 to 25 g / m ² , preferably A spunbond fiber nonwoven fabric having a mass of about 20 g / m ² can be used. The outer surfaces of the front and rear waist sheets 26 and 27 are optionally subjected to grid-like embossing and debossing, and uneven patterns are arranged. In the present embodiment, the central portion 13C of the crotch region 13 is formed only from the base sheet 25, but may be formed from a plurality of sheets.

  Referring to FIGS. 2 and 3, a front waist elastic body 41 extending in the lateral direction X in the front waist region 11 is attached between the front waist sheet 26 and the base sheet 25 so as to be contractable in an extended state. Between the rear waist sheet 27 and the base sheet 25, a rear waist elastic body 42 extending in the lateral direction X in the rear waist area 12, and a hip elastic body extending in a curved shape from the rear waist area 12 toward the crotch area 13 43 is attached so that it can contract in an extended state. The front and rear waist regions 11 and 12 have front and rear waist elastic regions 45 and 46 that are elastically stretchable by the front and rear waist elastic bodies 41 and 42 being disposed. Further, in the rear waist region 12 and the crotch region 13, a buttock elastic region 47 is formed by disposing the buttock elastic body 43.

  The front and rear waist elastic bodies 41 and 42 can be formed of a string-like or strand-like elastic material. The front and rear waist elastic bodies 41 and 42 have a fineness of about 470 to 940 dteX, and are preferably arranged in the longitudinal direction Y at a distance of about 5 to 20 mm. In the present embodiment, the front and rear waist elastic bodies 41 and 42 disposed in the front and rear outer elastic regions 45A and 46A have a fineness of about 620 dteX, an expansion ratio of about 2.2 to 2.8 times, and a length in the longitudinal direction Y of about They are spaced apart by 6 mm. Further, the front and rear waist elastic bodies 41 and 42 disposed in the front and rear inner elastic regions 45B and 46B have a fineness of about 470 to 940 dteX, an expansion ratio of about 2.2 to 2.8 times, and about 5. in the longitudinal direction Y. They are spaced apart from 0 to 15.0 mm apart. The buttocks elastic body 43 can be formed from a plurality of string-like or strand-like elastic materials having a fineness of about 500 to 800 dteX and an extension magnification of about 1.1 to 2.5 times.

<Front waist elastic area>
Referring to FIG. 2, the front waist elastic region 45 has a front outer elastic region 45A extending in the lateral direction X on the waist opening 23 side and a front inner elastic region 45B extending in the horizontal direction X on the crotch region 13 side. The rear waist elastic region 46 has a rear outer elastic region 46A extending in the lateral direction X on the waist opening 23 side, and a rear inner elastic region 46B extending in the horizontal direction X on the crotch region 13 side. The front outer elastic region 45A and the rear outer elastic region 46A, and the front inner elastic region 45B and the rear inner elastic region 46B are located opposite to each other in the front-rear direction in the wearing state. In this embodiment, the extension stress in the predetermined width of the front outer elastic region 45A is lower than the extension stress in the predetermined width of the front inner elastic region 45B, and the extension stress in the predetermined width of the rear outer elastic region 46A is It is lower than the elongation stress in the predetermined width of the inner elastic region 46B. Here, the predetermined width refers to a width dimension (dimension in the longitudinal direction Y) to which the extension stress of each elastic region can be compared. In this embodiment, the extension stress at a width of 20 mm is compared as described later. .

<Liquid absorption structure>
Referring to FIGS. 2 and 3, the liquid absorbing structure 15 includes a front end edge 15 a and a rear end edge 15 b that are separated from each other in the vertical direction Y and extend in the horizontal direction X, and are separated from each other in the horizontal direction X in the vertical direction Y. And a front end portion 16A, a rear end portion 16B, and a central portion 16C located between the front and rear end portions 16A and 16B. The liquid-absorbing structure 15 is located on the skin-facing surface side, and is a body-side liner 50 made of a fiber nonwoven fabric having liquid permeability, a liquid-absorbing absorbent body 51 having curved side edges, and a pair of barrier cuffs. A sheet 52 and a leak-proof sheet 53 are included. The absorbent body 51 includes, for example, a liquid absorbent core formed from a mixture of fluff pulp and absorbent polymer particles, and a liquid absorbent diffusible core wrap sheet such as tissue paper that encapsulates the entire liquid absorbent core. Including. The liquid-absorbent core has a front end edge extending in the lateral direction X in the front waist region 11, and a rear end edge that is spaced apart from the front end edge in the longitudinal direction Y and extends in the lateral direction X in the rear waist region. The body side liner 50, the barrier cuff sheet 52, and the leakproof sheet 53 form end flaps extending in the longitudinal direction Y from the front edge and the rear edge of the liquid-absorbent core, respectively. The liquid absorbing structure 15 and the base sheet 25 are joined to each other via a joining region 60 formed from a known joining means such as a hot melt adhesive applied to at least one of the facing surfaces. In the present embodiment, the bonding area 60 is configured by a plurality of bonding sites spaced in the longitudinal direction Y, but may be a continuous bonding area so as to bond the entire back surface of the liquid absorbing structure 15. .

  The pair of barrier cuff sheets 52 are folded in two and the inner surfaces thereof are fixed to each other, and are fixed to the skin-facing surface of the body side liner 50 and are separated from each other in the longitudinal direction Y and are fixed to each other. A fixed side edge portion 52b extending in the vertical direction Y, and a free side edge portion 52a located inside the horizontal direction X from the fixed side edge portion 52b. A cuff elastic body 57 made of a string-like or strand-like elastic material and extending in the longitudinal direction Y is attached to the free side edge portion 52a of the barrier cuff sheet 52 so as to be contracted in an extended state. When the cuff elastic body 57 contracts, the free side edge portion 52a is separated from the body side liner 50 toward the wearer's body side, and a pair of leakage prevention cuffs for preventing side leakage of body fluid is formed. The leak-proof sheet 53 is formed from a liquid-impervious fiber nonwoven fabric, a liquid-impervious and moisture-permeable plastic film, or a laminate sheet thereof, and is disposed so as to cover at least substantially the entire lower surface of the absorbent body 51. The body fluid is prevented from leaking from the non-skin facing surface (bottom surface) side of the liquid absorbing structure 15.

  In the present embodiment, the front and rear waist regions 11 and 12 and the crotch region 13 are formed in series by the base sheet 25, but as long as the effects of the present invention to be described later are exerted, the front and rear waist regions 11, 12 and The crotch region 13 may be formed by separate panels, for example, a front waist panel, a rear waist panel, and a crotch panel.

<Side junction area>
Referring to FIGS. 1 and 4, both side edges of the front and rear waist regions 11 and 12 are connected via a side joint region 22. In the following, the configuration of the side joint region 22 of one side edge portion of the side joint regions 22 located at both side edges of the front and rear waist regions 11 and 12 will be described, but the side of the other side edge portion will be described. The junction region 22 has the same characteristic configuration. Further, it is only necessary that at least one side edge portion of the side joint regions 22 located at both side edge portions has the characteristic configuration of the side joint region 22. Each side junction region 22 is divided into first to fourth regions 64, 65, 66, and 67 in the longitudinal direction Y for convenience. In each zone, the side junction area 22 includes an inner area 61 located inside the lateral direction X, an outer area 62 located outside the lateral direction X, and an intermediate area 63 located between the inner and outer areas 61, 62. And have. The joint portion 30 located in the side joint region 22 includes a first joint portion 31 located in the inner region 61, a second joint portion 32 located in the outer region 62, and a third joint portion 33 located in the intermediate region 63. Have The first, second, and third joint portions 31, 32, and 33 are disposed apart from each other.

  The first area 64 is located on the side of the waist opening 23, and the separation dimension R1 in the longitudinal direction Y of the first joint portion 31 is larger than those of the other areas 65, 66, and 67. Here, the separation dimension in the longitudinal direction Y refers to the distance in the longitudinal direction Y of the non-joining portions located between the joining portions 30 adjacent to each other in the longitudinal direction Y. The second area 65 is located on the crotch area 13 side adjacent to the first area 64, and the third area 66 is located on the crotch area 13 side adjacent to the second area 65. The fourth area 67 is located between the first area 64 and the waist opening 23. In each of the areas 64 to 67, each of the first, second, and third joint portions 31, 32, and 33 has substantially the same size so that the area of the joint portion 30 is substantially equal.

  Referring to FIG. 6, in the first section 64, the first joint portion 31 extends in the first direction M inclined toward the crotch region 13 from the inner side in the lateral direction X to the outer side. The second and third joint portions 32 and 33 extend in the second direction N inclined toward the crotch region 13 from the outside in the lateral direction X toward the inside. In the first section 64, the first joint portion 31 does not extend in the second direction N, and the second and third joint portions 32 and 33 do not extend in the first direction M.

  The value of the angle θ1 between the first direction M and the horizontal axis Q (the smaller of the angles) θ1 is in the range of 0 degree <θ1 <90 degrees, and 5 degrees ≦ θ1 ≦ 45 degrees. It is more preferable. The value of the intersection angle θ2 between the second direction N and the horizontal axis is more preferably in the range of 0 degree <θ2 <90 degrees and 5 degrees ≦ θ2 ≦ 45 degrees. In the present embodiment, the first, second, and third joint portions 31, 32, and 33 are each rectangular, but the shape is not limited to this, and the first, second, and third joint portions 31, 32, and 33 are long in the first direction M or the second direction N. For example, an oval shape or the like may be used.

  For convenience, the first section 64 is positioned in the longitudinal direction Y in the first row 71 where the first joint portion 31 is disposed, and adjacent to the first row 71 on the crotch region 13 side, and the third joint portion 33 is And a plurality of first and second rows 71 and 72 are arranged in the longitudinal direction Y to form a first area. Note that the dimension D1 in the longitudinal direction Y of the first row 71 is equal to the dimension in the longitudinal direction Y of the first joint portion 31, and the third joint portion 33 is not disposed in the first row 71. The dimension D2 in the vertical direction Y of the second row 72 is equal to the size from the lower end of the first row 71 to the lower end of the third joint 33, and the first joint 31 is not arranged in the second row 72. Yes, at least one second joint 32 is arranged. Note that the second joint portion 32 disposed in the second row 72 may be disposed across the first row 71 and the second row 72. In the present embodiment, one first joint portion 31 is arranged in the first row 71, and one second and third joint portions 32, 33 are arranged in the second direction N in the second row 72. They are arranged in a straight line.

  In the present embodiment, there is further a third row 73 that is located on the crotch region 13 side adjacent to the second row 72 and in which at least a part of the second joint portion 32 is disposed in the longitudinal direction Y. The third row 73 is further adjacent to the first row 71, and a plurality of first to third rows 71 to 73 are arranged in the vertical direction Y to form a first section 64. Note that the second joint portions 32 arranged in the third row 73 may be arranged across the first row 71. In the first area 64, the first, second, and third joints 31, 32, and 33 are displaced from each other in the longitudinal direction Y (that is, the upper ends of the joints are not aligned in the lateral direction X). .

  In the first section 64, the separation dimension R1 in the longitudinal direction Y of the first joint portion 31 is substantially equal to the separation dimension R3 in the longitudinal direction Y of the third joint portion 33, and the second joint portion 32 in the longitudinal direction Y. The separation dimension R <b> 2 is smaller than the separation dimension R <b> 1 of the first joint portion 31. In the present embodiment, the separation dimensions R1 and R3 of the first and third joint portions 31 and 33 are about 3.0 to 10.0 mm, and the separation dimension R2 of the second joint portion 32 is about 1.0 to 1.0. 5.0 mm.

  Referring to FIGS. 4 and 5, the front and rear waist elastic bodies 41 and 42 extend to the outer edge of the side joint region 22, and at least the inner region of the first region 64 among the first to fourth regions 64 to 67. 61 overlaps with the front and rear waist elastic regions so as to be elastically expandable and contractable in the lateral direction X. In the present embodiment, the first region can extend and contract in the lateral direction X from the inner region 61 to the outer region 62. In the second, third, and fourth areas 65, 66, and 67, it is preferable that at least the inner area 61 can expand and contract in the lateral direction X.

  Referring to FIGS. 5A to 5C, in the first area 64 and the fourth area 67, the base sheet 25 in the front and rear waist areas 11 and 12, the front waist sheet 26 that forms the non-skin facing surface, and the front waist sheet 26, the bent portion 28, the rear waist sheet 27 that forms the non-skin facing surface, and the bent portion 29 of the rear waist sheet 27 are welded in a stacked state, and the number of stacked sheet members is the largest. Yes. The second area 65 is located at a portion where the number of stacked sheet members changes. In the illustrated example, the number of stacked sheet members in the second area 65 is 6 at the upper end portion 65A, 4 at the lower end portion 65B, and 5 at the intermediate portion 65C. In the third area 66, the number of stacked sheet members is smaller than in other areas. As described above, in the first and fourth areas 64 and 67 in which the number of laminated sheet members is relatively large, the cushioning property becomes high, and in the vicinity of the waist opening 23 where the wearer is likely to feel irritation, the touch is improved and the irritation is improved. Can be reduced.

  Referring to FIG. 6B, in the conventional diaper 100, the joint 130 extends linearly continuously in the lateral direction X from the inner region to the outer region of the side joint region 22. When the sheet member is torn in the side joining region 22, the sheet member is easily torn along the extending direction of the joining part 130 in the non-joining part (non-welded part). In the conventional diaper 100, the sheet member is easily torn in one direction (that is, the lateral direction X) along the joining portion 130, and the joining portion is not arranged in a direction intersecting the direction. There is a possibility that the side edges of the front and rear waist regions 11 and 12 may be torn carelessly.

  Referring to FIG. 6A, in the diaper 10 of the present embodiment, since the separation dimension R1 of the first joint portion 31 is larger in the first section 64 than in other sections, the inner area 61 of the side joint area 22 is used. And the diaper 10 can be easily lifted by placing a finger on the first area 64 during the wearing operation. Further, when the diaper 10 is pulled up, if the first area 64 is torn near the first joint portion 31, the diaper 10 is positioned outside the first joint portion 31 in the lateral direction X, and Breaking is suppressed by the second and / or third joint portions 32 and 33 extending in the second direction N intersecting the one direction M, and the side edges of the front and rear waist regions 11 and 12 are prevented from being inadvertently torn. it can. In addition, since the first, second, and third joint portions 31, 32, and 33 are disposed so as to be displaced from each other in the longitudinal direction Y, the tearing in the lateral direction X can be effectively prevented.

  Further, with respect to one first joint portion 31 arranged in the first row 71, in the second row 72 adjacent to the first row 71, the second and third joint portions 32 and 33 are arranged one by one. The length dimension of the joint portion 30 extending in the second direction N (that is, the first dimension) is larger than the length dimension of the joint portion 30 extending in the first direction M (that is, the length dimension of the first joint portion 31). The sum of the length dimensions of the second and third joint portions 32 and 33 is longer. Therefore, even if the separation dimension R1 of the first joint portion 31 is relatively large, the tear can be effectively suppressed. Furthermore, in the present embodiment, in the third row 73, the second joint portion 32 is arranged, so that inadvertent tearing can be further suppressed.

  As described above, in the first section 64, the separation dimension R1 of the first joint 31 and the separation dimension R3 of the third joint 33 are substantially equal, and the separation dimension R3 of the third joint 33 is relatively large. Therefore, the flexibility of the side junction region 22 is high. Further, since the separation dimension R2 of the second joint part 32 located outside the first and third joint parts 31 and 33 in the lateral direction X is smaller than the separation dimension R1 of the first joint part 31, the side joint region The outer area 62 of 22 can increase the bonding strength and prevent inadvertent tearing.

  When the diaper 10 after use is disposed of, the side joint area 22 is intentionally torn. In such a discarding operation, a pulling force F is applied to the end of the side joint region 22 on the side of the waist opening 23 from the inner region 61 to the outer region 62 so as to go inward in the longitudinal direction Y (see FIG. 4). ), The side joining region 22 is preferably easily broken by the force F. In the diaper 10 of the present embodiment, the first joint portion 31 disposed in the inner region 61 extends in the first direction M so as to be parallel to the direction in which the tensile force F is applied. The region 22 is easily torn. In addition, when tearing the side joining area | region 22 and discarding the diaper 10, it is preferable that joining intensity | strength becomes weak in the area | region of the waist opening 23 side most. Since both ends of the direction Y are likely to be the base points where external forces are concentrated and tearing occurs, the fourth region 67 located closest to the waist opening 23 locally increases the bonding strength and prevents inadvertent tearing. ing. In the fourth area 67, the first joint portion 31 located in the inner area 61 extends in the first direction M.

  Further, since the side joint region 22 can be elastically contracted in the lateral direction X by the front and rear waist elastic bodies 41 and 42, the joint portion 30 is formed in the heel formed in the front and rear waist regions 11 and 12 in appearance. The diaper 10's aesthetics are improved. Furthermore, the waist opening 23 can be easily opened in the front-rear direction by the contracting action of the front and rear waist elastic bodies 41, 42, and the waist opening 23 can be easily opened in the wearing operation.

  Referring to FIG. 7, in the second area 65, it is preferable that the ratio of the area of the joint 30 per unit area is higher than that of the first area 64. The ratio of the area of the joint portion 30 per unit area of the second area 65 may be substantially equal to that of the first area 64, but by making it higher than the first area 64, It can prevent more effectively that a joining area is torn apart carelessly. Here, the ratio of the joints 30 per unit area in each area refers to the ratio of the total area of the joints 30 arranged in the area to the total area of the area in each area. The ratio of the junction 30 per unit area in the first area 64 is about 5 to 15%, and the ratio of the junction 30 per unit area in the second area 65 is about 5 to 20%.

In the second section 65, the first joint portion 31 extends in the first direction M, and the separation dimension R4 of the first joint sections 31 adjacent to each other in the longitudinal direction Y is larger than the separation dimension R1 in the first section 65. Is also small. The second joint portion 32 extends in the second direction N, and the separation dimension R5 of the second joint portions 32 adjacent to each other in the longitudinal direction Y is substantially equal to the separation dimension R4 of the first joint portion 31. Furthermore, in this embodiment, the separation dimension R5 of the second joint portion 32 in the second section 65 is substantially equal to the separation dimension R2 of the second joint section 32 in the first section 64. The third joint portion 33 includes a first inclined joint portion 33 a extending in the first direction M and a second inclined joint portion 33 b extending in the second direction N. The first inclined joint portion 33a is arranged in a straight line in the first direction 31 and the first joint portion 31, and the second inclined joint portion 33b is arranged in a straight line in the second joint portion 32 and the second direction N. It is arranged with.

  The second area 65 is divided into first, second, and third rows 74, 75, and 76 arranged in the vertical direction Y for convenience. The dimension D4 in the vertical direction Y of each row is substantially equal, and one first joint portion 31 and one second joint portion 32 are arranged in each row. A plurality of first to third rows 74 to 76 are arranged in the vertical direction Y to form a second area 66. In the first row 74, the first joint portion 33 a and the second slope joint portion 33 b are arranged in the third joint portion 33 so as to be aligned with the first joint portion 31 and the second joint portion 32. In the second row 75, the second inclined joint portion 33 b is arranged so as to be aligned with the second joint portion 32. In the third row 76, the third joint portion 33 is not disposed. The second inclined joint portions 33b arranged in the first row 74 and the second row 75 may be partially arranged across the second row 75 and the third row 76, respectively.

  As described above, in the second area 65, the number of stacked sheet members is different between the upper end portion 65A and the lower end portion 65B. At the time of manufacturing the diaper 10, when the joint portions 30 are formed on both side edges of the front and rear waist regions 11, 12, the joint strength of the individual joint portions 30 varies at a portion where the number of stacked sheet members changes. It tends to occur. In the diaper 10 of the present embodiment, since the ratio of the area of the joint portion 30 per unit area is relatively large in the second area 65, the required joint strength is maintained and inadvertent tearing is prevented. be able to. Further, in the second section 65, the third joint 33 has the first inclined joint 33a extending in the first direction M, and therefore the third joint 33 extends only in the second direction N. Compared to the above, it is possible to induce tearing of the sheet member in the disposal operation and to easily tear the side joint region 22.

  Referring to FIG. 8A, in the third area 66, the ratio of the area of the joint 30 per unit area is higher than that of the first area 64, and at least the arrangement pattern of the third joint 33 is the second area. It is different from 65. In addition, it is preferable that the ratio of the area of the joint portion 30 per unit area in the third area 66 is substantially equal to or higher than that of the second area 65. In the third section 66, the first joint portion 31 extends in the first direction M, and the separation dimension R6 of the first joint sections 31 adjacent to each other in the longitudinal direction Y is larger than the separation dimension R1 in the first section 65. Is also small. The second joint portion 32 extends in the second direction N, and the separation dimension R7 of the second joint portions 32 adjacent to each other in the longitudinal direction Y is substantially equal to the separation dimension R6 of the first joint portion 31. The third joint portion extends in the second direction N, does not extend in the first direction M, and the separation dimension R8 of the third joint portions 33 adjacent to each other in the longitudinal direction Y is the separation of the first joint portion 31. It is almost equal to the dimension R6. The separation dimension R7 of the second joint portion 32 in the third section 66 is preferably substantially equal to or smaller than the separation dimension R2 of the second joint section 32 in the first section 64.

  In the third section 66, the second and third joint portions 32 and 33 are arranged one by one on the crotch region 13 side of the first joint portion 31 with respect to one first joint portion 31. The second joint portion 32 and the third joint portion 33 are arranged in a straight line in the second direction N. In the present embodiment, in the second area 65 and the third area 66, the ratio of the area of the joint 30 per unit area is substantially equal, and only the arrangement pattern of the third joint 33 is different. In the third section 66, the inclination angle with respect to the horizontal axis Q of the first joint portion 31 is smaller than that in the first section 64 (that is, the value of the intersection angle θ1 is smaller than that in the first section 64). Preferably).

  In the side junction area 22, in the 3rd area 66 located in the leg opening 24 side most, a tear of a wearer's leg tends to produce during wearing of the diaper 10. FIG. In the diaper 10 of this embodiment, the ratio of the area of the joint portion 30 per unit area is higher than that of the first area 64, and the joint strength of the third area 66 is increased, so Breaking can be prevented. Further, in the second area 65 and the third area 66, the arrangement pattern of the joint portions 30 is changed, and the area (first area 64) in which the number of stacked sheet members is the largest and the area (first area) in which the number of laminated sheets is the smallest. 3 areas 66) and at least three areas of the number of stacked layers (second area 65) are changed by changing the arrangement pattern of the joints 30 to maintain the required joint strength and prevent inadvertent tears. However, it is easy to tear in the disposal operation.

  Referring to FIG. 8B, the fourth area 67 is an area from the upper edge of the first area 64 to the waist opening edge, and the ratio of the joint portion 30 per unit area is higher than that of the other areas. ing. In the fourth section 67, the first joint portion 31 extends in the first direction M, and the second joint portion 32 extends in the second direction N. The separation dimension R9 of the first joint portions 31 adjacent to each other in the longitudinal direction Y is equal to the separation dimension of the second joint portions 32 adjacent to each other in the longitudinal direction Y, and further, the separation distance of the second joint portions 32 in the first section 64. Equal to dimension R2. In the fourth section 67, the third joint 33 is arranged such that one first inclined joint 33a extending in the first direction M is arranged in the first direction M with respect to one first joint 31. One second inclined joint portion 33 b extending in the second direction N is arranged side by side in the second direction N with respect to the two second joint portions 32. By arranging such a fourth area 67 at the end on the waist opening 23 side, inadvertent tearing in the wearing operation can be effectively prevented.

  Referring to FIG. 4, the length dimension (dimension in the longitudinal direction Y) L2 of the first section 64 is about 15.0 to 60.0% of the length dimension L1 of the side joint region 22, The length dimension L3 of the second section 65 is about 25.0 to 40.0% of the length dimension L1, and the length dimension L4 of the third section 66 is about 10.0 of the length dimension L1. The size is ~ 35.0%. In addition, the length dimension L5 of the 4th area 67 is about 0-10.0 mm, and the structure which does not provide the 4th area 67 (namely, length dimension L5 = 0 mm) may be sufficient. The length dimension L3 of the second section 65 is preferably larger than the length dimension L2 of the first section 64. In the first to fourth sections 64, 65, 66, and 67, all the first joint portions 31 extend in the first direction M. Therefore, it is possible to easily tear the side joint area 22 in the disposal operation. The separation dimensions R2 and R7 in the longitudinal direction Y of the second joint portion 32 are substantially equal. In addition, the front and rear waist elastic bodies 41 and 42 contract the inner and outer regions 61 and 62 and the intermediate region 63 of the first to fourth regions 64, 65, 66 and 67 in the lateral direction X, and the length direction (vertical direction Y ) Over the entire area, the joint 30 is less noticeable in appearance.

  Referring to FIG. 5, the first and fourth areas 64 and 67 are positioned in the front and rear outer elastic areas 45 </ b> A and 46 </ b> A, and the third area 66 is included in the front and rear inner elastic areas 45 </ b> B and 46 </ b> B and the buttocks elastic area 47. Is located. In the second area 65, boundary portions between the front and rear outer elastic regions 45A and 46A and the front and rear inner elastic regions 45B and 46B are located. As described above, the front and rear outer elastic regions 45A and 46A where the first section 64 is located have lower elongation stress in a predetermined width than the front and rear inner elastic regions 45B and 46B where the third section 66 is positioned. . In such a diaper 10, it is easy to grip the first area 64 and widen the waist opening 23 in the wearing operation, and the flexibility is high and the pulling operation becomes easier. On the other hand, on the leg opening 24 side where the third section 66 is located, it is possible to enhance the fit and effectively prevent side leakage. The boundary portion between the front outer elastic region 45A and the front inner elastic region 45B and the boundary portion between the rear outer elastic region 46A and the rear inner elastic region 46B are the colors of the front and rear waist elastic bodies 41 and 42, respectively. And the fineness, the separation dimension (pitch) in the longitudinal direction Y, and the like can be distinguished.

<Method for measuring elongation stress>
The tensile stress of each elastic region of the front and rear waist regions 11 and 12 is set to 100 mm / min using an tensile tester (INSTRON model: 5564) manufactured by Instron Japan Company Limited. It was measured. For a portion that does not overlap with the liquid absorbing structure in each elastic region, a specimen having a length of 30 to 50 mm in the lateral direction X is cut out from the portion, and the specimen in a natural state is separated from the specimen in the lateral direction X. A pair of marked lines with a dimension of 20 mm is entered, and the extension force of each specimen when it is extended until the separation dimension becomes 1.7 times is obtained and compared. In addition, when the dimension of the vertical direction Y of the diaper 10 which is the width dimension in each test piece is not constant, each extension stress when converted to the value when the width is 20 mm for each test piece Compare the specimens.

  In addition to the materials described in the specification, various known materials that are usually used in this type of article can be used without limitation for each component member constituting the diaper 10 according to the present invention. In the specification and claims, terms such as “first” and “second” are used to simply distinguish similar elements, positions, and the like.

10 Diapers (wearing articles)
11 front waist region 12 rear waist region 13 crotch region 22 side joint region 23 waist opening 30 joint portion 31 first joint portion 32 second joint portion 33 third joint portion 61 inner region 62 outer region 63 intermediate region 64 first region 65 Second area 66 Third area 71 First row 72 Second row X Horizontal direction Y Vertical direction

Claims (13)

In a disposable wearing article including a longitudinal direction and a lateral direction, a front waist region, a rear waist region, a crotch region located between the front and rear waist regions, a waist opening and a pair of leg openings,
At least one side edge of the front and rear waist region is joined to each other via a side joint region where a plurality of joints extending discontinuously in the longitudinal direction are located.
The side joining area has a first area located on the waist opening side,
The joint includes: a first joint located on the inner side in the lateral direction; a second joint located on the outer side in the lateral direction; and the first joint and the second joint in the lateral direction. A third joint located between,
In the first section, the first joint has a first spacing direction that is larger than the other sections in the vertical direction and is inclined toward the crotch area from the inner side to the outer side in the lateral direction. The second joint and the third joint are located on the crotch region side of the first joint, and the second joint is directed from the lateral outer side to the inner side. The wearing article that extends in a second direction inclined toward the crotch region side, the third joint portion extends in the second direction, and does not extend in the first direction.   The first zone is located on the crotch zone side adjacent to the first row, where the first joint is disposed and the third joint is not disposed, The wearing article according to claim 1, wherein a plurality of second rows in which the third joint portion is arranged and the first joint portion is not arranged are arranged in the longitudinal direction.   One said 1st junction part is arrange | positioned in the said 1st row | line, The said 2nd junction part and the said 3rd junction part are arrange | positioned along with the said 2nd direction in the said 2nd row | line. Item 3. The wearing article according to Item 1 or 2.   The wearing article according to any one of claims 1 to 3, wherein in the first section, the first joint portion and the third joint portion have the same distance in the longitudinal direction.   5. The wearing article according to claim 4, wherein in the first section, a separation dimension in the longitudinal direction of the second joint portion is smaller than a separation dimension in the longitudinal direction of the first joint portion.   The wear according to any one of claims 1 to 5, wherein in the first section, the first joint, the second joint, and the third joint are displaced from each other in the longitudinal direction. Goods. The side joint region has an inner region where the first joint portion is located, an outer region where the second joint portion is located, and an intermediate region where the third joint portion is located,
The wearing article according to any one of claims 1 to 6, wherein at least in the first area, the inner area is elastically stretchable in the lateral direction.   The wearing article according to any one of claims 1 to 7, wherein the first area has the largest number of laminated sheet members in the side joining area. The side junction area is located on the crotch area side adjacent to the first area, and has a second area in which a ratio of the junction per unit area is higher than the first area.
The separation dimension of the third joint portion adjacent in the longitudinal direction in the second section is smaller than the separation dimension of the third joint section adjacent in the longitudinal direction in the first section. The wearing article according to crab.   The wearing article according to claim 9, wherein in the second section, the third joint portion includes a first inclined joint portion extending in the first direction and a second inclined joint portion extending in the second direction.   The wearing article according to claim 9 or 10, wherein the upper end portion of the second section in the longitudinal direction has a larger number of laminated sheet members than the lower end portion.   The side junction area further includes a third area located on the crotch area side with respect to the second area, and the second area and the third area have an arrangement pattern of at least the third junction portion. The worn article according to any one of claims 9 to 11. The front-rear waist region has an elastic region that can elastically expand and contract in the lateral direction, and the third elastic region is located in the outer elastic region in which the first region is located in the longitudinal direction. The wearing article according to claim 12, wherein the extensional stress in the predetermined width is lower than that of the inner elastic region.

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