JP2016198219A - Disposable body liquid absorbent wearing article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable body liquid absorbent article having a waist area where elastic members are held between two sheets.SOLUTION: In a disposable body liquid absorbent wearing article 200 with a disposable diaper as one example, an inner surface sheet 21 and an outer surface sheet 22 in at least one of a front panel 13 and a rear panel 14 are connected with the use of an adhesive adhering on the front surfaces of elastic members 33. In a skin cover part 142 formed in one of the front panel and the rear panel and extending downward from the lower end edge 27 of the other panel, connection is also performed in spot deposition parts 30 aligned in a horizontal direction B between an elastic member 35 located at the lowest position in the skin cover part and a lower end edge 37 of the skin cover part.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a disposable bodily fluid-absorbing wearing article suitable for use as a disposable diaper or the like, and more particularly to the bodily fluid-absorbing wearing article having a waist opening and a pair of leg opening.

  Disposable body fluid absorbent wearing articles having a waistline opening and a pair of leghole openings are generally well known as disposable pant-type diapers and disposable pull-on diapers. Moreover, it is such a wearing article, and a panel-like member is used for the waistline region and the crotch region, and a plurality of elastic members extending in the stretched state in the waistline direction are attached to the panel-like member forming the waistline region. What has been known is conventionally known.

  For example, a disposable pull-on garment described in Japanese translations of PCT publication No. 2008-508082 (P2008-508082A, Patent Document 1) has an annular elastic belt for use around the waist of a wearer. The annular elastic belt has a front belt portion and a rear belt portion, and each of the front and rear belt portions has a center panel and left and right side panels. The annular elastic belt also includes an outer layer and an inner layer, and the belt elastic member is inserted between the outer layer and the inner layer. The outer layer and the inner layer are joined, and when the diaper is used, it is joined between the outer layer and the inner layer without the belt elastic member contracting so that the front and rear belt portions provide elasticity.

  An example of a pants-type disposable diaper described in Japanese Patent Application Laid-Open No. 2011-15821 (P2011-15821A, Patent Document 2) has an absorbent body and an outer layer body, and between the two sheets constituting the outer layer body. It has a waist elastic expansion / contraction part in which a plurality of waist elastic members are interposed, and below this waist elastic expansion / contraction part, two sheets are partially joined by a large number of joints formed in the form of dots. Has been. The waist elastic member is fixed to the two sheets only in the pair of side seal portions formed on the diaper, and is not fixed to any of the two sheets between the side seal portions.

Japanese translation of PCT publication No. 2008-508082 (P2008-508082A) JP 2011-15821 A (P2011-15821A)

  In conventional pull-on diapers and pants-type diapers in which a waistline region is formed by interposing an elastic member extending in the waistline direction between two sheets, the two sheets are joined by joining the two sheets. Each may lose its inherent flexibility. Joining the two sheets at a splice-like joint will maintain the inherent flexibility of each of the two sheets. However, fixing the waist elastic member to the side seal portion of the diaper only at both ends thereof means that the waist elastic member does not function at all when one of the both end portions is detached from the side seal portion in the diaper being worn. Connected.

  The subject of the present invention is a disposable body fluid that has been improved so as not to impair the flexibility of the two sheets with respect to the waistline region in which an elastic member is interposed between the two sheets. The provision of an absorbent wearing article.

  In order to achieve the above object, the present invention includes a front panel that forms a front waistline region, a rear panel that forms a back waistline region, and a crotch panel that forms a crotch region, wherein the front and back panels have both side edges. And a disposable body fluid-absorbing wearing article in which a plurality of elastic members extending in parallel to the lateral direction are attached in an extended state to at least one of the front and rear panels. And

  The disposable body fluid-absorbing wearing article according to the present invention has an upper end edge and a lower end edge each of the front and rear panels extending in the lateral direction. In the one panel, the wearer's skin of the wearing article The inner sheet facing the outer sheet and the outer sheet facing the clothing are joined by an adhesive adhering to the surface of the elastic member interposed between the two sheets, and the one panel is the other panel The portion extending downward from the lower edge of the panel forms a skin covering portion on the outer side of both side portions of the crotch panel, and the inner surface sheet and the outer surface sheet in the skin covering portion are the skin. The elastic member and the skin covering portion that are joined by the adhesive that adheres to the surface of the elastic member in the covering portion and that are positioned at the bottom of the covering portion in the vertical direction The plurality of spot-like welded portions arranged in the lateral direction are joined to the lower end edge portion, and the spot-like welded portions are also formed so as to form a row extending in the vertical direction. It is characterized by being.

  In the disposable body fluid-absorbing wearing article according to the present invention, the inner sheet and the outer sheet of at least one of the front panel and the rear panel are attached to the surface of the elastic member interposed between these two sheets. Since the inner sheet and the outer sheet are not joined between the adjacent elastic members, the two sheets do not impair their inherent flexibility. . In the vertical direction of the wearing article, between the elastic member located at the bottom and the lower end edge of the panel, the two sheets are joined at the spot-like welded part, so that they are joined together via the elastic member. Separation of both sheets is prevented.

The drawings show specific embodiments of the disposable body fluid absorbent wearing article according to the present invention, including optional and preferred embodiments as well as the essential features of the invention.
The perspective view of the diaper which is an example of a disposable wearing article. The partially broken top view of the extension diaper obtained from the diaper of FIG. The figure which shows the III-III line | wire cut surface of FIG. The partial perspective view of the diaper containing the IV-IV line | wire cut surface of FIG. The figure similar to FIG. 2 which shows an example of embodiment. The perspective view of the diaper which is an example of embodiment. The partially broken top view of the extension diaper obtained from the diaper of FIG. VIII-VIII line arrow directional view of FIG. The perspective view of the diaper which is another example of embodiment. The partial fracture top view of the extension diaper obtained from the diaper of FIG.

  Taking a disposable pants-type diaper as an example of the disposable body fluid absorbent wearing article according to the present invention, the details will be described with reference to the accompanying drawings.

  FIG. 1 is a perspective view of a disposable pant-type diaper 10. The diaper 10 includes an annular elastic waist member 11 and a crotch panel 12. The elastic waist member 11 includes a front panel 13 that forms the front waistline region 7 and a rear panel 14 that forms the rear waistline region 8, and both the panels 13, 14 are respectively side edges 13 a, 14 a of each other. Are joined together in a seam region 15a formed by a large number of joining spots 15 arranged in the vertical direction A and extending in the vertical direction A. A waistline opening 16 is defined by the front panel 13 and the rear panel 14, and a pair of leg opening 17 is defined by the panels 13, 14 and the crotch panel 12. A part of the crotch panel 12 forms a crotch region 9 (see FIG. 2). In the figure, the vertical direction, the horizontal direction, and the front-rear direction of the diaper 10 are indicated by double-headed arrows A, B, and C. The underpants type diaper 10 in the present invention means a diaper having a waistline opening and a pair of leg hole openings, and is sometimes called a pull-up type diaper.

  FIG. 2 shows an extension obtained by unbonding the front panel 13 and the rear panel 14 in the seam region 15a in the diaper 10 of FIG. 1 and extending the panels 13, 14 and the crotch panel 12 in a planar shape. It is a partial fracture top view of diaper 10a. The extended diaper 10a has a center line P that bisects the dimension in the lateral direction B. A double-headed arrow A in FIG. 2 means that it is the vertical direction in FIG.

In the extended diaper 10a, the front panel 13 includes an inner sheet 21 facing the diaper wearer's skin (not shown), an outer sheet 22 facing the diaper wearer's clothes (not shown), and the sheets 21, 22 and a plurality of elastic members 23 extending in parallel with each other in the lateral direction B. Between the side edges 13a and 13a, the inner sheet 21 and the outer sheet 22 are applied to the elastic member 23 and adhered to the surface of the elastic member 23. Hot-melt adhesive HA ₅ (see FIG. 4) In addition to being bonded to each other via an adhesive such as the above, they are also bonded in the seam regions 15a formed on the side edges 13a. However, the seam area 15a is formed by embossing or ultrasonic processing of the front panel 13 and the rear panel 14 under heating. The inner sheet 21 is also joined to the crotch panel 12 by the hot melt adhesive HA _{1 at the} portion where the front panel 13 and the crotch panel 12 overlap (see FIG. 1). Front panel 13, the upper edge 26, a bottom end portion 27, and a side edge portion 13a, and the upper edge 26 and lower edge 27 has a dimension L _F laterally B. Side edges 13a has a dimension _{W F} in the vertical direction A. The elastic member 23 extends to the side edge portions 13a in parallel with the upper edge 26, and a plurality of waist elastic members 23a in which the distance between adjacent ones in the vertical direction A does not exceed 5 mm; A plurality of auxiliary elastic members 23b between the waist elastic member 23a and the lower end edge portion 27 of the front panel 13 and extending to the side edge portions 13a in parallel with each other, and the separation between adjacent members is at least 5 mm. Including.

  The front panel 13 also joins the inner sheet 21 and the outer sheet 22 below the lowermost elastic member 25 (see FIG. 1) that is positioned at the bottom of the auxiliary elastic member 23b in the vertical direction A. A plurality of spot-like welds 20 for the purpose. The welded portion 20 is formed to have a size that fits inside a circle whose diameter does not exceed 4 mm, and is formed so that the distance between adjacent ones falls within a range of 10-50 mm. The welded portion 20 is also preferably formed so as to be lined up from one side edge portion 13a to the other side edge portion 13a with a constant or substantially constant separation dimension. It is also possible to implement the present invention in a form in which the welded portion 20 is not formed in the central portion 28 (see FIG. 1) that overlaps the crotch panel 12. Here, the distance between the welded portions 20 means the shortest distance between the peripheral edges of the adjacent welded portions 20. In the present invention, the term “spot shape” does not mean that the spot shape is specified. The shape includes irregular shapes in addition to regular shapes such as circular, oval, square, rectangular, and star shapes.

The rear panel 14 is formed by interposing a plurality of elastic members 33 extending in parallel with each other in the lateral direction B between the inner sheet 31 and the outer sheet 32 that overlap each other. Between the side edge portions 14a and 14a, the inner sheet 31 and the outer sheet 32 are applied via a hot melt adhesive (not shown) applied to the elastic member 33 and adhered to the surface of the elastic member 33. They are joined together. Rear panel 14, the upper edge 36, a bottom end portion 37, and a side edge portion 14a, and the upper edge 36 and lower edge 37 has a dimension L _R in the lateral direction B. Side edges 14a has dimensions _{W R} in the vertical direction A. Dimensions _{L R} is the same in size _{L F} of the front panel 13. The dimensions _{W R} is the same in dimension _{W F} in the front panel 13. In the rear panel 14, the elastic member 33 extends in parallel to the upper edge 36 to both side edges 14 a, and a plurality of strips in which the distance between adjacent ones in the vertical direction A does not exceed 5 mm. The waist elastic member 33a, the waist elastic member 33a, and the lower end edge portion 37 of the rear panel 14 extend parallel to each other to the side edge portions 14a, and the separation between adjacent members is at least 5 mm. And a plurality of auxiliary elastic members 33b.

  The rear panel 14 also has a plurality of spots for joining the inner sheet 31 and the outer sheet 32 below the lowermost elastic member 35 that is located at the bottom of the auxiliary elastic member 33b in the vertical direction A. The welded portion 30 has a shape. The welded portion 30 is formed to have a size that fits inside a circle whose diameter does not exceed 4 mm, and is formed so that the distance between adjacent ones falls within a range of 10-50 mm. The welded portion 30 is preferably formed so as to be lined up from one side edge portion 14a to the other side edge portion 14a with a constant or substantially constant separation dimension. It is also possible to implement the present invention in such a manner that the welded portion 30 is not formed in the central portion 38 that overlaps the crotch panel 12.

Crotch panel 12, and an intermediate portion 43 located between these two ends 41, 42 and the front end 41 and rear end 42, through a hot-melt adhesive HA ₁ to the inner surface of the front end portion 41 is the front panel 13 Are joined. The rear end portion 42 is joined to the inner surface of the rear panel 14 by means of hot melt adhesive HA _2. The middle part 43 forms a crotch region 9. The crotch panel 12 also includes both side edges 46 extending in the vertical direction A and a pair of leakage barriers 47 extending along each side edge 46. Leakage breakwater 47 includes a lower bank portion 48 extending from side edge 46 toward center line P of extended diaper 10a, and upper bank portion 49 folded back at inner edge 48a of lower bank portion 48. An elastic member 49a extending in the vertical direction A is attached to 49 in an extended state. At the front end portion 41 and the rear end portion 42, the lower bank portion 48 is joined to the inner surface sheet 50 of the crotch panel 12 via the hot melt adhesive HA ₃ , and the upper bank portion 49 is connected to the hot melt adhesive HA ₄ . To the lower bank portion 48.

FIG. 3 is a diagram showing a cross section taken along the line III-III crossing the crotch panel 12 in the crotch region 9 in FIG. 2. The inseam panel 12 includes an absorbent body 55 that is formed by coating a water-absorbing material 56 formed of pulverized pulp, a mixture of pulverized pulp and superabsorbent polymer particles with a liquid-permeable sheet 57 such as tissue paper, An inner surface sheet 50 formed of a liquid non-woven fabric and covering at least the inner surface of the absorber 55, and an outer surface of the absorber 55 formed of a liquid-impervious plastic film or the like A liquid-impervious leak-proof sheet 58, and an exterior sheet 59 that is formed of a non-woven fabric that is comfortable to touch and covers the outer surface of the leak-proof sheet 58. The absorber 55 is joined to the inner surface sheet 50 and the leak-proof sheet 58 via a hot melt adhesive (not shown), and the leak-proof sheet 58 and the exterior sheet 59 are joined via a hot-melt adhesive HA _5. ing. The inner surface sheet 50 and the leak-proof sheet 58 extend from the peripheral edge of the absorber 55 and overlap each other, and are joined via a hot melt adhesive (not shown). At the side edge portion 46 of the crotch panel 12, the lower bank portion 48 of the leak-proof bank 47 formed of a nonwoven fabric overlaps the exterior sheet 59 and is joined to each other via the hot melt adhesive HA ₆ . Between the lower bank portion 48 and the exterior sheet 59 that are joined to each other, a leg-hole elastic member 62 is interposed, and at least one of the lower bank portion 48 and the exterior sheet 59 is extended in the vertical direction A. Bonded to one side. When the diaper 10 is in the state shown in FIG. 1 or in the worn state, the elastic member 49a in the upper levee portion 49 contracts to cause the bottom in the folded state in FIGS. As shown in phantom lines in FIG. 3, the bank portion 48 and the upper bank portion 49 rise upward toward the inside of the drawing, that is, toward the inside of the diaper 10, and act to prevent side leakage of body fluid. .

FIG. 4 is a view showing a section taken along line IV-IV in FIG. The IV-IV line extends in the vertical direction A across the front waistline region 7, that is, at the lower edge 27 of the front panel 13, intersecting the welded portion 20 and the auxiliary elastic member 23 b including the lowermost elastic member 25. In FIG. 4, the inner surface sheet 21 and the outer surface sheet 22 are joined to the auxiliary elastic member 23b by the hot melt adhesive HA ₅ attached to the surface of the auxiliary elastic member 23b. The inner sheet 21 and the outer sheet 22 are also joined to each other by melting and solidifying at least one of the sheets in the weld portion 20. The inner sheet 21 and the outer sheet 22 are formed with gathers 61 and 62 as the auxiliary elastic member 23b contracts (see also FIG. 1). Although not shown, the inner sheet 21 and the outer sheet 22 in the front waistline region 7 of the diaper 10 are applied by a hot melt adhesive (not shown) applied to the waist elastic member 23a and adhered to the surface thereof. Are also joined to each other via the elastic member 23. The inner surface sheet 21 and the outer surface sheet 32 in such a state are not soft to the touch in the portion overlapping the elastic member 23, but in the non-joint portion 24 located between the elastic members 23, the sheets The soft touch inherent to 21 and 22 is maintained. In addition to having such functions and effects, the diaper 10 has an inner sheet 21 and an outer sheet 22 inflated as shown in the illustrated example by forming gathers 61 and 62 between the elastic members 23. If it will be in a state, it will have the effect that the softness | flexibility of the front waist area 7 further improves.

However, as will be described later, the elastic member 23 is a small one having a fineness of 1.5 to 3 times that having a fineness of 500-700 dtex, and therefore, the hot melt adhesive HA ₅ applied to the elastic member 23. The contact area between the inner surface sheet 21 and the hot melt adhesive HA ₅ and the outer sheet 22 is also reduced. As a result of this, the inner sheet 21 and / or the outer sheet 22 may easily peel from the elastic member 23 during the process of manufacturing the diaper 10 and while wearing the diaper 10. Such a phenomenon is likely to occur in the lowermost elastic member 25 among the elastic members 23. The imaginary lines 21 and 22 in FIG. 4 exemplify the inner sheet 21 and the outer sheet 22 when peeled from the lowermost elastic member 25 as described above. The inner sheet 21 and / or the outer sheet 22 peeled from the lowermost elastic member 25 can be easily peeled from the auxiliary elastic member 23b located above the lowermost elastic member 25.

  However, in the diaper 10 according to the present invention, the inner sheet 21 and the outer sheet 22 are welded to each other at the welding portion 20 formed below the lowermost elastic member 25, so that the inner sheet 21 and / or the inner sheet 21 and / or Or the outer surface sheet 22 is prevented from peeling. The welded portion 20 has such actions and effects, but is formed to a size that fits inside a circle that does not exceed 4 mm in diameter, so that the skin of the wearer can be stimulated. Absent.

In order to join the inner sheet 21, the outer sheet 22, and the elastic member 23 with the hot melt adhesive HA ₅ as shown in the drawing, the following process may be performed. That is, in the manufacturing process of the diaper 10, the hot melt adhesive HA ₅ is applied to a continuous body of the elastic member 23 supplied in an expanded state in the machine direction, and the inner sheet 21 is formed so as to sandwich the continuous body. The web for forming the outer sheet 22 and the web for forming the outer sheet 22 may be continuously supplied in the machine direction to form a composite web including these webs and a continuous body of elastic members 23. Moreover, the welding part 20 can be formed by performing the ultrasonic welding process or the embossing under a heating to the required site | part of the composite web currently drive | working in the machine direction.

  The rear panel 14 of the diaper 10 has functions and effects similar to the functions and effects brought about by the welded part 20 in the front panel 13 by forming the welded part 30. That is, also in the rear panel 14, the inner sheet 31 and the outer sheet 32 are joined to each other via a hot melt adhesive (not shown) applied and adhered to the elastic member 33, thereby Between the elastic members 33 and 33 adjacent to each other in A, the inherent flexibility of each of the sheets 31 and 32 is maintained. Further, the welded portion 30 prevents the inner sheet 31 and / or the outer sheet 32 from being peeled off from the elastic member 33, particularly from the lowermost elastic member 35.

  The diaper 10 in the illustrated example is such, but the present invention is carried out either in a mode in which the welded portion 20 is not formed on the front panel 13 or in a mode in which the welded portion 30 is not formed on the rear panel 14. It is also possible to do. In addition, an aspect in which the inner sheet 21 and the outer sheet 22 in the front panel 13 are joined by a hot melt adhesive without using the elastic member 23, or the inner sheet 31 and the outer sheet 32 in the rear panel 14 form the elastic member 33. It is also possible to carry out in a mode in which they are joined by a hot-melt adhesive without intervention. In these aspects, the operation and effect according to the present invention can be obtained in either the front panel 13 or the rear panel 14.

In the diaper 10, the inner sheets 21 and 31 and the outer sheets 22 and 32 in the front panel 13 and the rear panel 14 are made of thermoplastic synthetic fibers having a fineness of 1-7 dtex, and are 7-20 g / m ² . A non-woven fabric having a mass per unit area and soft and soft to the touch, such as a spunbond nonwoven fabric or a spunbond-meltblown-spunbond nonwoven fabric, can be used. The inner surface sheet 21 and the inner surface sheet 31 may be formed of the same nonwoven fabric, or may be formed of different nonwoven fabrics. The outer surface sheet 22 and the outer surface sheet 32 may also be formed of the same nonwoven fabric, or may be formed of different nonwoven fabrics. The inner sheet 21 and the outer sheet 22 and / or the inner sheet 31 and the outer sheet 32 may include elastic yarns such as urethane elastic yarns, and may be elastically extensible sheets. For the elastic members 23 and 33, for example, 500-700 dtex LYCRA (registered trademark) can be used by extending 1.5-3 times.

In the crotch panel 12, the inner surface sheet 50 requires a nonwoven fabric of thermoplastic synthetic fiber having a fineness of 1-5 dtex and a mass per unit area of 7-35 g / m ² , such as a spunbond nonwoven fabric or an air-through nonwoven fabric. If so, it can be used after being hydrophilized. For the exterior sheet 59, a nonwoven fabric having a fineness of 1-7 dtex and a mass per unit area of 10-30 g / m ² , such as a spunbond nonwoven fabric or a spunbond-meltblown-spunbond nonwoven fabric, can be used. As the leak-proof sheet 58, for example, a film having a thickness of 0.01 to 0.03 mm and formed of a thermoplastic synthetic resin, more preferably a gas-permeable and liquid-impermeable film can be used. For the elastic members 49a and 62, 500-700 dtex LYCRA (registered trademark) can be stretched 2-3 times.

FIG. 5 is a view similar to FIG. 2 showing an example of the embodiment of the invention. From the extended diaper 10a in FIG. 5, a diaper 10 having the same appearance as the diaper 10 in FIG. 1 can be obtained. However, in the extended diaper 10 a of FIG. 5, the front cover 18 is used for the front panel 13, and the rear cover 19 is used for the rear panel 14. The front cover 18 covers the front edge 12 </ b> _F of the crotch panel 12 on the inner side of the diaper 10 and extends to both side edges 13 a. The front cover 18, to the inner sheet 21 and the crotch panel 12 are joined by a hot melt adhesive HA _8. Rear cover 19 extends to the respective side edge portions 14a and covers the rear edge 12 _R of the crotch panel 12. Rear cover 19, to the inner sheet 31 and the crotch panel 12 are joined by a hot melt adhesive HA _9.

The front cover 18 and the rear cover 19 used in this way are, for example, when the infant wears the diaper 10, the front edge 12 _F and the rear edge 12 _R of the crotch panel 12 strongly strengthen the skin. It is to be able to rise without doing. For the front cover 18 and the rear cover 19, a soft non-woven fabric having a fineness of 1-5 dtex and a mass of 8-15 g / m ² , for example, an air-through non-woven fabric or a spunbonded non-woven fabric can be used. The form illustrated in FIG. 5 shows that the inner sheet 21 and / or the inner sheet 31 according to the present invention can be partially covered with a sheet separate from both the sheets 21 and 31.

  6 and 7 are views similar to FIGS. 1 and 2 showing an example of the embodiment. However, reference numeral 100 is used for the diaper in FIG. 6, and reference numeral 100a is used for the extended diaper in FIG. Moreover, the same referential mark as the diaper 10 is used for the member and site | part which are common to the diaper 10 in the diaper 100.

  6 and 7, in the front panel 13 of the diaper 100 and the extended diaper 100a, in a part of the central portion 28 of the front panel 13 and the side portions 29 located between the central portion 28 and the side edges 13a, respectively. An additional weld 120 is formed above the lowermost elastic member 25. In the extended diaper 100a, the additional welded portion 120 and the welded portion 20 are adjacent to each other in the vertical direction A so that the additional welded portion 120 and the welded portion 20 form a row 121 indicated by a virtual line extending in the vertical direction A. At least one space 129 is formed between the members 23b. The auxiliary elastic member 23b also includes a lowermost elastic member 25. However, it is not necessary that the additional welded portion 120 is formed in all the spaces 129. It is sufficient that the additional welded portion 120 is formed in at least three spaces 129 located immediately above the lowermost elastic member 25. The welded portion 20 and the additional welded portion 120 are also portions where the inner sheet 21 and the outer sheet 22 are locally cured. The outer sheet 22 is formed with a gather 162 that extends in the vertical direction A when the auxiliary elastic member 23b contracts. When the gather 162 having such a shape is formed, it is preferable that the welded portion 20 and / or the additional welded portion 120 have a rectangular shape or an oval shape that is long in the vertical direction A.

  The rear panel 14 of the extended diaper 100a in FIG. 7 is formed in the same manner as the front panel 13, and a part of the central part 38, which is the part where the rear panel 14 and the crotch panel 12 are joined, the central part 38 and both sides. An additional welded portion 130 is formed above the lowermost elastic member 35 at both side portions 39 which are portions between the edge portions 14a. In the extended diaper 100a, the additional welded portion 130 and the welded portion 30 are adjacent to each other in the vertical direction A so that the additional welded portion 130 and the welded portion 30 form a row 131 indicated by an imaginary line extending in the vertical direction A. At least one space 139 is formed between the members 33b. The auxiliary elastic member 33b also includes a lowermost elastic member 35. However, it is not necessary that the additional weld 130 is formed in all the spaces 139. It is sufficient that the additional welded portion 130 is formed in at least three spaces 139 located immediately above the lowermost elastic member 35. In such a rear panel 14, as in the case of the front panel 13, when the gathering is formed by contracting the elastic member 33, the row 131 of the welded portion 30 and the additional welded portion 130 has the gathered shape. In this case, the flanges and the groove portions appear alternately, and at the top of the flange portion and the bottom of the groove portion.

  In the diaper 100 of FIG. 6 in which both side portions 29 of the front panel 13 and both side portions 39 of the rear panel 14 are formed in this way, the front panel 13 and the rear panel 14 of the portion that defines the leg opening 17 are formed. In addition, a gather including a flange portion and a groove portion extending in parallel with each other upward from the respective lower edge portions 27 and 37 (see FIGS. 6 and 7), for example, a gather 162 in the front panel 13 is generated. In such a diaper 10, when the mother tries to insert a hand into each of the leg opening 17 from below the diaper 100 when the infant is to wear it, a part of the periphery of the leg opening 17 is defined. Since the eaves and / or the groove extending upward from each of the lower edge portions 27 and 37 is a guide for the hand to be inserted, the hand can be easily inserted and the diaper 10 can be quickly worn.

  8 is a partial perspective view of the front panel 13 in FIG. 6 including a section taken along line VIII-VIII in FIG. The line VIII-VIII intersects with the plurality of additional welds 120 in a side-by-side state in one of the spaces 129. In the front panel 13, when the elastic member 23 contracts and a gather is formed, the row 121 formed by the welded portion 20 and the additional welded portion 120 is vertically aligned along the row 121. It extends in the direction A and acts so as to be a gather 162 that repeats undulations such that the flanges 162a and the grooves 162b appear alternately in the lateral direction B. In the gather 162, as illustrated, the row 121 is located at the top of the flange 162a and the bottom of the groove 162b. As apparent from FIG. 8, each of the flange portion 162 a and the groove portion 162 b when viewed from the outside of the diaper 100 is a groove portion and a flange portion when viewed from the inside of the diaper 100.

  9 and 10 are views similar to FIGS. 1 and 2 for a pants-type diaper 200 which is an example of the embodiment. In the diaper 200, about the site | part and member which are common in the diaper of FIG. 1, 2 and the extension diaper 10a, the same referential mark as FIG.

The diaper 200 includes a front panel 13, a rear panel 140, and a crotch panel 12, and the front panel 13 and the crotch panel 12 are made the same as those of the diaper 10. In the rear panel 140, the upper end edge 36 and the lower end edge 37 have the same dimensions as the upper end edge 26 and the lower end edge 27 of the front panel 13, as in the diaper 10. However, the dimensions _{W R} in the vertical direction A of the side edges 140a of the rear panel 140 is greater than the dimension _{W F} of the side edge portions 13a of the front panel 13. Such after panels 140, skin against hip skin having a waist portion 141 having dimensions W ₁ is the same in size W _F, the dimension W ₂ which is a difference between the dimension W _R and dimensions W _F And a covering portion 142.

  Similar to the rear panel 14 of the diaper 10, the rear panel 140 is formed by the inner sheet 31, the outer sheet 32, and the elastic member 33, and the elastic member 33 includes a plurality of waist elastic members 33 a and a plurality of lines. Auxiliary elastic member 33b. However, at least one of the auxiliary elastic members 33b is in the skin covering portion 142 and extends in the lateral direction B in an extended state. In the vertical direction A of the skin covering portion 142, the auxiliary elastic member 33b located at the bottom is the lowermost elastic member 35 in the rear panel 140. Further, in the skin covering portion 142, an edge portion below the lowermost elastic member 35 and extending in the lateral direction B is at least a part of the lower end edge portion 37 of the rear panel 140.

  The both side edges 14 a of the rear panel 140 are joined to the side edges 13 a of the front panel 13 by joining spots 15. Further, in the skin covering portion 142, the inner sheet 31 and the outer sheet 32 (see FIG. 10) are bonded by the bonding spot 15 in the seam area 15b that is an extension of the seam area 15a.

  In such a rear panel 140, in addition to the seam region 15 b, the welded portion 30 for joining the inner sheet 31 and the outer sheet 32 is between the lowermost elastic member 35 and the lower edge 37 of the skin covering portion 142. Is formed. The welded portions 30 arranged in the horizontal direction B form a row 135 indicated by an imaginary line. The extension of row 135 intersects seam area 15b. Therefore, the inner surface sheet 31 and the outer surface sheet 32 in the skin covering portion 142 do not peel from the outside in the lateral direction B or from the lower side in the vertical direction A. The rear panel 140 can also be formed with an additional weld 130 in the space 139 above the lowermost elastic member 35 as shown in the example if necessary. Furthermore, if the welded portion 30 and the additional welded portion 130 form a row 131, the rear panel 140 has the same gathers as in FIG. Can form a gather extending from the skin covering portion 142 to the waist portion 141. With the diaper 200 having such a gather, it becomes easy to insert the mother's hand into the leg opening 17 even if the skin covering portion 142 is provided.

  In the present invention, the skin covering portion 142 may be formed on the front panel 13. Further, the skin covering portion 142 may be formed on the front panel 13 and the rear panel 140. However, the covering portion when formed on the front panel 13 is outside the both side portions of the crotch panel 12 in the lateral direction B and covers the skin of the base portion of the leg of the diaper wearer.

  In the present invention, in the rear panel 140 of the diaper 200, the inner sheet 21 and the outer sheet forming the waist 141 are provided on either the inner sheet 21 or the outer sheet 22 forming the skin covering portion 142. It is also possible to use a material different from the sheet material used for any one of 22, for example, non-woven fabrics having different masses per unit area. In this case, the waist portion 141 and the skin covering portion 142 can be joined at a partially overlapped portion.

  The disclosure relating to the present invention described above can be organized into at least the following matters.

A front panel that forms a front waistline region, a rear panel that forms a rear waistline region, and a crotch panel that forms a crotch region, wherein the front and rear panels are joined to each other at both side edges, At least one of the panels is a disposable body fluid absorbent wearing article in which a plurality of elastic members extending in parallel in the lateral direction are attached in an extended state,
Each of the front and rear panels has an upper end edge and a lower end edge extending in the lateral direction,
In the one panel, an inner sheet facing the skin of the wearer of the wearing article and an outer sheet facing the clothing are adhered to the surface of the elastic member interposed between the two sheets. Joined,
In the one panel, a portion extending downward from the lower end edge of the other panel forms a skin covering portion on each outer side of the crotch panel, and the inner surface of the skin covering portion The sheet and the outer sheet are joined by the adhesive that adheres to the surface of the elastic member in the skin covering portion, and the elastic member that is positioned at the lowest in the vertical direction in the covering portion And a plurality of spot-like welded portions arranged in the lateral direction between the lower edge of the skin covering portion and the spot-like welded portions so as to form a row extending in the vertical direction. Also formed.

The present invention disclosed in the above paragraph can include at least the following embodiments. The embodiments can be adopted separately or in combination with each other.
(1) The plurality of elastic members in the one panel are parallel to the upper edge, and the plurality of waist elastic members in which the separation distance in the vertical direction does not exceed 5 mm; and the waist elasticity A plurality of auxiliary elastic members between the member and the lower edge and having a vertical separation distance of at least 5 mm, and the welded portion forms the row extending in the vertical direction. It is also formed between the elastic members.
(2) The row is formed by at least three welds.
(3) In the other of the front and rear panels, an inner sheet facing the skin and an outer sheet facing the clothing are interposed between the two side edges between the two sheets. While being joined by an adhesive adhered to the surface of the elastic member, between the elastic member located at the lowest in the vertical direction and the lower edge, the lateral direction Joined at a plurality of spot-like welds lined up.
(4) The plurality of elastic members in the other panel are parallel to the upper edge, and the plurality of waist elastic members in the vertical direction do not exceed 5 mm, and the waist A plurality of auxiliary elastic members between the elastic member and the lower edge and having a vertical separation of at least 5 mm, and the welded portion of the other panel extends in the vertical direction. It is also formed between the auxiliary elastic members so as to form.
(5) The row in the other panel is formed by at least three welds.
(6) Each of the side edge portions of the front and rear panels is joined in a seam region extending in the vertical direction, and the seam region extends to the skin covering portion, and the inner surface sheet and the outer surface in the skin covering portion. Sheets are also joined in the seam area.
(7) An extended line of the row of the welded portions formed by arranging the plurality of spot-like welded portions arranged in the lateral direction intersects the seam area in the skin covering portion.

7 Front waistline area 8 Rear waistline area 9 Inseam area 10 Pants type diaper 12 Inseam panel 13 Front panel 13a Side edge part 14 Rear panel 14a Side edge part 15a, 15b Seam area 20 Welding part 21 Inner surface sheet 22 Outer sheet 23 Elastic member 25 Lowermost elastic member 30 Welded portion 31 Inner surface sheet 32 Outer surface sheet 33 Elastic member 35 Lowermost elastic member 37 Lower end edge portion 120 Additional welded portion 130 Additional welded portion 135 Row 142 Skin covering portion A Vertical direction B Horizontal direction C Front-back direction HA ₅ adhesive HA ₆ adhesive

Claims (8)

A front panel that forms a front waistline region, a rear panel that forms a rear waistline region, and a crotch panel that forms a crotch region, wherein the front and rear panels are joined to each other at both side edges, At least one of the panels is a disposable body fluid absorbent wearing article in which a plurality of elastic members extending in parallel in the lateral direction are attached in an extended state,
Each of the front and rear panels has an upper end edge and a lower end edge extending in the lateral direction,
In the one panel, an inner sheet facing the skin of the wearer of the wearing article and an outer sheet facing the clothing are adhered to the surface of the elastic member interposed between the two sheets. Joined,
In the one panel, a portion extending downward from the lower end edge of the other panel forms a skin covering portion on each outer side of the crotch panel, and the inner surface of the skin covering portion The sheet and the outer sheet are joined by the adhesive that adheres to the surface of the elastic member in the skin covering portion, and the elastic member that is positioned at the lowest in the vertical direction in the covering portion And a plurality of spot-like welded portions arranged in the lateral direction between the lower edge of the skin covering portion and the spot-like welded portions so as to form a row extending in the vertical direction. It is also formed on the wearing article. The plurality of elastic members in the one panel are parallel to the upper edge, and the plurality of waist elastic members in the vertical direction do not exceed 5 mm, the waist elastic members, A plurality of auxiliary elastic members between the lower edge and the separation distance in the vertical direction is at least 5 mm,
The wearing article according to claim 1, wherein the welding part is formed between the auxiliary elastic members so as to form the row extending in the vertical direction.   The wearing article according to claim 2, wherein the row is formed by at least three welds.   In the other of the front and rear panels, the elastic member is interposed between the inner sheet facing the skin and the outer sheet facing the clothing between the both side edges. A plurality of the elastic members arranged in the horizontal direction between the elastic member positioned at the lowest position in the vertical direction and the lower edge. The wearing article in any one of Claims 1-3 joined in the spot-like welding part. The plurality of elastic members of the other panel in the other panel are parallel to the upper edge, and a plurality of waist elastic members whose separation distance in the vertical direction does not exceed 5 mm; and the waist elastic member, A plurality of auxiliary elastic members between the lower edge and the vertical separation of at least 5 mm;
The wearing article according to any one of claims 4 to 5, wherein the welded portion of the other panel is formed between the auxiliary elastic members so as to form a row extending in the vertical direction.   The wearing article according to claim 5, wherein the row in the other panel is formed by at least three welds.   Each of the side edge portions of the front and rear panels is joined in a seam region extending in the up-down direction, the seam region extends to the skin covering portion, and the inner surface sheet and the outer surface sheet in the skin covering portion are also The wearing article in any one of Claims 1-6 joined in the said seam area.   The wearing article according to claim 7, wherein an extension line of a row of the welded portions formed by arranging the plurality of spot-shaped welded portions arranged in the lateral direction intersects the seam region in the skin covering portion. .

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