TW201538140A - Disposable underpants-type diaper - Google Patents

Abstract

Provided is a disposable underpants-type diaper that can prevent a bodily fluid absorbent structure from being visible from outside of an outer cover. This disposable underpants-type diaper has an underpants-type outer cover (15), and a bodily fluid absorbent structure (20) is attached to the inner surface (18) of the outer cover (15). The outer cover (15) has an inner layer portion (31) formed from an elastic member and an outer layer portion (32) formed from a non-elastic sheet, and the elastic contraction of the inner layer portion (31) causes the formation of a plurality of gathers (40) in the outer layer portion (32). In the bodily fluid absorbent structure (20), at least a portion of the center (20a) in the lateral direction (B), and both side sections (20b) in the lateral direction (B) are linked in the lateral direction (B) in a state not bonded to the outer cover (15).

Description

Disposable shorts diaper

The present invention relates to a disposable pants type diaper.

The disposable short-sleeved diaper is known to be formed of a pants-type member and a gasket-like body fluid absorbing member of the body. Further, a known pants-type diaper has a gap formed between a pants-type member and a body fluid-absorbent member in the lower femoral region of the pants-type member.

For example, in the diaper of Japanese Patent No. 3579905 (Patent Document 1), when the lid body is in the same state as that when worn, a space is formed between the lid body and the absorber.

The disposable underpants of Japanese Patent No. 3124423 (Patent Document 2) are stretchable undergarment members and spacer members, and a gap is formed between the undergarment member and the spacer member in the field of the femoral. A laminate of a stretchable nonwoven fabric and a stretchable moisture permeable plastic film is used for the undergarment member. In the back sheet of the spacer member, a laminate of a stretchable nonwoven fabric and a stretchable moisture-permeable plastic film is also used.

[Practical Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 3579905

[Patent Document 2] Japanese Patent No. 3124423

In a diaper in which a gap is formed between a member of a pants type and a spacer member attached to the inside and a body fluid absorbing member such as an absorbent body, the pants-type member and the body fluid absorbent member are not joined to each other. In comparison with the diaper in the case of close contact, it is difficult to see that the body fluid absorbing member is difficult to see from the outside of the pants-type member. For the user who disposable the diaper, it is possible to achieve the effect of alleviating the impression that the third person sees wearing the diaper. However, in order to improve this effect, it is necessary to use a method of thickening a sheet member such as a nonwoven fabric for forming a pants-type member or coloring the sheet member.

An object of the present invention is to provide an improved disposable pants type diaper which is capable of easily seeing the body fluid absorbing portion attached to the inside of the underpants-type covering portion from the outside of the covering portion.

In order to solve the above problems, the object of the present invention is a disposable pants type diaper having vertical directions perpendicular to each other and In the lateral direction and the anterior-posterior direction, a shorts-type covering portion having an inner surface and an outer surface is formed by the anterior and posterior condyle and the posterior condyle and the sub-femoral region, and the inner surface is attached to the periphery of the anterior The body fluid absorbing portion of the core material extending in the domain and the posterior iliac crest region and containing the body fluid absorbing property.

The features of the present invention are as follows. The covering portion includes an elastic member that repeats the elastic elongation and contraction in the lateral direction, and an inelasticity that forms at least one of the inner surface and the outer surface and does not elastically elongate in the lateral direction. The sheet-like member is joined to the inelastic sheet-like member in an extended state of the elastic member, and when the elastic member is contracted, a large number of wrinkles are formed in the inelastic sheet-like member. The body fluid absorbing portion has an outer surface side facing the inner surface of the covering portion and an opposite side, that is, an inner surface side, and the outer surface side is the front sill region and the sulcus surrounding region of the covering portion and At least the front inner peripheral region of the lower femoral region and the inner surface of the posterior condyle region are joined to each other on the outer surface side of the inner surface of the lower femoral region in the middle portion of the lateral direction At least a part of the two sides in the lateral direction are in a non-joining state, and the part and the both side portions are connected in the non-joined state in the lateral direction.

The body fluid absorbing portion in the disposable pants type diaper according to the present invention is a portion in which both end portions are joined to the inner peripheral surface of the front sulcus and the sacral region of the covering portion, and the portion between the both end portions is provided. Because it is the central Since at least a part and both side parts are not joined to the inner surface of the submerged field of the covering portion, a gap can be generated between the portion in the non-joining state and the covering portion. Further, the covering portion is elastically contracted in the lateral direction, and wrinkles are formed on at least one of the outer surface and the inner surface. Further, in the sub-femoral region of the diaper when the covering portion is in the contracted state, the body fluid absorbing portion is difficult to see from the outside of the covering portion by the gap between the covering portion and the body fluid absorbing portion and the wrinkles formed in the covering portion. It is difficult to recognize the existence from the outside of the covered portion.

A‧‧‧ longitudinal direction

B‧‧‧Horizontal

C‧‧‧ front and rear direction

CD‧‧‧ cross direction

5‧‧‧Hot fusion adhesive

10‧‧‧Disposable shorts diapers

11‧‧‧ Elastic members around the leg

12‧‧‧ Front and rear domains

12a, 13a‧‧‧ side edge

12b‧‧‧胴 Around the edge of the opening

13‧‧‧After the surrounding area

13b‧‧‧胴 Around the edge of the opening

14‧‧‧Under the field

14a‧‧‧Bottom

14b‧‧‧ Both sides

15‧‧‧The Ministry of Coverage

16‧‧‧胴 Opening around

17‧‧‧ Opening around the leg

18‧‧‧ inside

19‧‧‧ outside

20‧‧‧ body fluid absorption department

20a‧‧‧Central Department

20b‧‧‧ both sides

21‧‧‧ front end

22‧‧‧ Back end

23‧‧‧With components

25‧‧‧ both sides

30‧‧‧Sheet members

31‧‧‧Flexible members (elastic sheet-like members, inner layer parts)

32‧‧‧Inelastic sheet-like members (outer part)

36‧‧‧ body fluid absorbent material

37‧‧‧ core material

38‧‧‧ liquid permeable sheet-like members

39‧‧‧ liquid-impermeable lamella

39a‧‧‧ liquid-impermeable plastic film

39b‧‧‧Nonwoven fabric

40‧‧‧ wrinkles

40a‧‧‧谷部

40b‧‧‧Lower ridge

40b‧‧‧High uplift

41‧‧‧Leakproof wall

42‧‧‧ top

43‧‧‧Flexible components

50‧‧‧Linear elastic members (elastic members)

110‧‧‧ diapers

517‧‧‧above

518‧‧‧ below

519‧‧‧above

530,630‧‧‧Composite network

531‧‧‧Flexible net

531a‧‧‧Elongation net

531b‧‧‧Elongated composite network

532‧‧‧Nonwoven network

535‧‧‧Hot Fusion Adhesive

540‧‧‧ wrinkles

540a‧‧‧ wrinkles

540b‧‧‧ wrinkles

550‧‧‧Smear machine

556‧‧‧ line

557‧‧‧ gap

618‧‧‧ below

619‧‧‧above

631‧‧‧Flexible net

631a‧‧‧ Widening network

631b‧‧‧ Widening composite network

632‧‧‧Nonwoven network

635‧‧‧Hot Fusion Adhesive

640‧‧‧ wrinkles

650‧‧‧Smear machine

656‧‧‧ line

657‧‧‧ gap

750‧‧‧Supersonic welding machine

750a‧‧‧ grinding head

750b‧‧‧Anvil

751‧‧‧Protruding

The following drawings are illustrative of specific embodiments of the invention, and include embodiments that are indispensable in the invention, embodiments that are selectively employed, and preferred embodiments.

[Fig. 1] A perspective view of a disposable pants type diaper.

[Fig. 2] A partially broken plan view of the unfolded diaper obtained from the diaper of Fig. 1.

[Fig. 3] A view showing a cross section taken along line III-III of Fig. 2 and a partially enlarged view thereof.

[Fig. 4] A view showing a cross section taken along line IV-IV of Fig. 2; (1) is an enlarged view of part a. (2) is a diagram showing a state when the portion a is contracted.

[Fig. 5] A view illustrating a manufacturing process of a sheet-like member for forming a covering portion.

[Fig. 6] A view showing another example of a manufacturing process of a sheet-like member for forming a covering portion.

[Fig. 7] A partial view showing a manufacturing process for another example of the manufacturing process of the sheet-like member.

[Fig. 8] A partial cross-sectional view showing a covering portion of an example of an embodiment. (1) is a longitudinal sectional view, and (2) is a view showing a cross section of the b-b line in (1).

The details of the disposable pants type diaper of the present invention will be described below with reference to the added drawings.

Fig. 1 is a perspective view showing an example of the disposable pants type diaper of the present invention, that is, a diaper 10 for a baby, and a part thereof is enlarged and displayed. Further, in the first drawing, the longitudinal direction, the lateral direction, and the front-rear direction of the diaper 10 are displayed by double-headed arrows A, B, and C. The diaper 10 is a pants-type covering portion 15 which is formed with a front sill surrounding area 12, a sacral surrounding area 13, and a sub-femoral field 14. In the covering portion 15, the front sill surrounding region 12 and the sill surrounding region 13 are joined to each other at the side edge portions 12a and 13a, thereby forming a cymbal surrounding opening 16 and a pair of leg peripheral openings 17. A strip-shaped leg-surrounding elastic member 11 (refer to FIG. 2 described later) is attached to each of both sides of the lower femoral region 14 so that each peripheral edge portion of the pair of leg-surrounding openings 17 can be elastically stretched or contracted. The covering portion 15 includes an inner surface 18 facing the skin of a diaper user (not shown) and a garment for the user of the diaper (not shown). Facing the outside of the 19th. A panel-shaped body fluid absorbing portion 20 is attached to the inner surface 18. In the outer surface 19 of the front sill area 12, the characters 2 and 3 for displaying the size and the like of the diaper 10 can be printed as needed. The covering portion 15 is formed in the lateral direction B as a whole, in other words, the elastic elongation and contraction are repeated in the direction around the crucible, but the longitudinal direction A does not extend. In the drawing, the covering portion 15 is elastically contracted. State, that is, a state of elastic relaxation. The diaper 10 of Fig. 1 is such that the presence of the opening around the crotch 16 and the opening 17 around the leg can be made clear by the force D, so that the forehead region 12 and the posterior condylar region 13 are in the front-rear direction C. Separated state. However, the magnitude of the force D is such that the front sill surrounding area 12 and the sill surrounding area 13 which are subsequently laminated in the manufacture of the diaper 10 are separated as shown in the example, and the covered portion 15 is not elastically elongated. The portion 14a of the lower femoral region 14 is the lowermost portion of the longitudinal direction A of the diaper 10. The line P-P is a vertical center line that bisects the size of the lateral direction B of the diaper 10, and passes through the lowermost portion 14a.

The enlarged view in part in the first drawing shows the wrinkles 40 which will be described later on almost the entire outer surface 19 of the covering portion 15. The wrinkles 40 are formed of an aggregate of thermoplastic synthetic fibers that are divided into the outer surface 19 of the covering portion 15, that is, a non-woven fabric forming body, and include valley portions 40a and raised portions 40b that alternately appear in the lateral direction B. The valley portion 40a and the raised portion 40b have a case where they extend continuously in the longitudinal direction A and a case where they are intermittently extended. In the covering portion 15, by observing the cross section in the lateral direction B, it was confirmed that the thickness of the valley portion 40a was thin, and the thickness of the raised portion 40b was thick.

Fig. 2 is a side edge portion of the diaper 10 of Fig. 1 When the joining of 12a and 13a is released, the portion of the stretched diaper 110 that elastically stretches the covering portion 15 in the lateral direction B of Fig. 1 can be broken. The diaper 10 and the stretch diaper 110 are substantially the same, and the same reference numerals as in the diaper 10 are used in each part of the stretch diaper 110.

In the stretch diaper 110, the covering portion 15 having the anterior condyle surrounding region 12, the posterior condyle surrounding region 13 and the lower femoral region 14 is a sheet-like member 30 including one of the elastic elongation and contraction in the lateral direction B. In the first drawing, the sheet-like member 30 is in a state of being elastically contracted. In the covering portion 15, the elastic members 11 around the legs located at the both side edge portions 14b of the lower femoral region 14 are elastically stretched and contracted in the circumferential direction of the opening 17 around the leg, and when the diaper 10 is worn, the opening around the leg is made 17 The peripheral portion elastically fits around the user's leg. Further, the side portion 20b of the body fluid absorbing portion 20 in the non-joining state does not protrude outside the leg opening 17 for the inner surface of the lower femoral region 14. When the covering portion 15 and the elastic members 11 around the leg are in an extended state, they are joined by a heat fusion adhesive.

In the inner surface 18 of the covering portion 15 in the stretch diaper 110, on the longitudinal center line P-P, the body fluid absorbing portion 20 extends from the lower femoral region 14 to the anterior condyle surrounding region 12 and the posterior condylar surrounding region 13.

The body fluid absorbing portion 20 has a distal end portion 21 and a rear end portion 22 which are not elongated in the lateral direction B and the front-rear direction Z except for the leak-preventing wall 41 to be described later. The distal end portion 21 is joined to the anterior condyle surrounding region 12 of the covering portion 15 through the thermal fusion adhesive 5 to be described later. The peripheral opening edge portion 12b and the rear end portion 22 are joined to the periorbital opening edge portion 13b of the crotch peripheral region 13 through the heat fusion adhesive 5. In the surrounding peripheral edge portions 12b and 13b of the crucible, the belt member 23 which is elastically stretched and contracted in the lateral direction B is passed through, and the front end portion 21 and the rear end portion 22 of the body fluid absorbent portion 20 are individually sandwiched. The heat fusion adhesive 5 is joined to the inner surface 18 of the covering portion 15.

Front-rear direction of the body fluid absorbent portion 20 is engaged with the inner surface although the covering portion 15 18 22 overall in the transverse direction B of the front end portion and the rear end portion 21, but the engagement portion C of the dimension E _1, E ₂ more Good is not more than 30mm. The body fluid absorbing portion 20 is further located in the longitudinal direction A in the first drawing and extends in the longitudinal center line PP extending in the front-rear direction C in the second drawing, and has a dimension F in the lateral direction B of not more than 30 mm. Central part 20a. The center portion 20a is a state in which at least a part of the front-rear direction C is in a non-joining state with respect to the covering portion 15. In the case of the illustration, the central portion 20a has a range G of at least 10 mm in front and rear of the lateral center line QQ extending in the lateral direction B through the lowermost portion 14a (refer to the first drawing) of the diaper 10. This is a state in which the covered portion 15 is not joined. The central portion 20a, if this range G is removed, may have a joint field H for the front sacral region 12, the posterior condyle region 13, and the femoral region 14 as shown in the example. Further, the body fluid absorbing portion 20 is in a state in which the both sides 20b other than the central portion 20a are not joined to the covering portion 15 in the entire width extending in the lateral direction B.

The stretch diaper 110 is in the diaper 10 in this state, and when worn, the inner face 18 of the covering portion 15 is in addition to the body fluid In addition to the portion where the absorbing portion 20 overlaps, the user's skin tends to adhere to each other. However, the two side portions 20b formed by the side edges 25 of the body fluid absorbing portion 20 and the portions adjacent thereto are not covered with the covering portion. The inner surface 18 of the 15 is in close contact with each other, and the adhesion is difficult. When the diaper 10 is worn, the both side edges 25 and the side portions 20b of the body fluid absorbing portion 20 do not have a clear line and expansion on the outer surface 19 of the covering portion 15, When the third person looks at the diaper 10, the presence of the body fluid absorbing portion 20 is inconspicuous, and it is difficult to recognize the presence thereof. Moreover, for the user, the third party is not easy to know that there is a diaper, and only the underwear is worn.

In the diaper 10, the central portion 20a of the body fluid absorbing portion 20 is in a range in which the covering portion 15 is not joined, for example, the range G is connected to the both side portions 20b in a state where the covering portion 15 is not joined, and the body fluid absorbing portion The entire width of 20 is a state in which the covering portion 15 is not joined. In the diaper 10 that has been worn, the covering portion 15 is formed to have a transverse cross-section of the body fluid absorbing portion 20 between the covering portion 15 and the body fluid absorbing portion 20 even if the covering portion 15 is closely adhered to the skin of the user. The air flowable gap in the direction B is reduced in the diaper 10 and the wearing feeling is good.

Figs. 3 and 4 are views showing a III-III line cut line and an IV-IV line cut line in Fig. 2, but a partial enlarged view is also shown in Fig. 3. In the fourth drawing, the enlarged view of the portion a of the covering portion 15 is displayed as (1), and the enlarged view of the state in which the portion a is contracted, that is, the state of the diaper 10 of the first drawing is displayed as (2) . As described above, the state of the cross section in the lateral direction B of the covering portion 15 changes between the state in FIG. 4 (1) and the state in (2) when the elongation and the contraction are repeated. In the drawings, the sheet-like member 30 forming the covering portion 15 includes a flat inner surface 18 facing the body fluid absorbing portion 20, and the elastic elongation and contraction in the lateral direction B can be repeated. The layer portion 31; and the outer surface 19 of the sheet-like member 30 are divided, and the inner layer portion 31 is flat when it is in an extended state (refer to FIG. 4 (1)), and forms a wrinkle 40 when it is in a contracted state (Fig. 4) (2) Reference to the outer layer portion 32. This wrinkle 40 is equivalent to the wrinkle 40 of the diaper 10 of Fig. 1 .

The inner layer portion 31 is a portion formed by an elastic sheet containing 20-60% by mass of an elastic thread and 80-40% by mass of an inelastic strand in the elastic sheet, and the mass per unit area is 10- The nonwoven fabric and the thickness in the range of 40 g/m ² are a polyurethane resin film or the like in the range of 0.001 to 0.05 mm. When the elastic yarn included in the inner layer portion 31 is a polyurethane elastic yarn, the inner layer portion 31 serves as a moisture absorbing material, and functions to reduce the moisturization when the diaper 10 is worn. Among the inelastic wires including the inner layer portion 31, there are fibers formed of a thermoplastic synthetic resin such as polyethylene, polypropylene, nylon, or polyester.

In the outer layer portion 32 of the illustrated example, a non-extensible nonwoven fabric can be used. In a specific example of the non-woven fabric, it is formed of a thermoplastic synthetic fiber having a fineness of 1-8 dtex, and has a spunbonded nonwoven fabric of a mass of 10 to 30 g/m ² and a melt-blown non-woven fabric and a spun yarn. Non-woven fabric such as a viscous-melt blown-spun non-woven fabric. In the example of the thermoplastic synthetic fiber, there is a composite fiber comprising a fiber formed of a thermoplastic synthetic resin such as polyethylene, polypropylene, nylon, or polyester, and a thermoplastic synthetic resin. When the inner layer portion 31 and the outer layer portion 32 are welded and joined by the heat fusion adhesive as exemplified in the fifth, sixth, and seventh embodiments to be described later, the inner layer portion 31 is wrinkled at the outer layer portion 32 when it is contracted.

Further, the thickness of the sheet-like member 30 and the film and the nonwoven fabric used therefor are for the measurement test piece taken from those, the area of the contact is 20 cm ² , and the test piece can be used for 3 gf/cm. A dial thickness gauge for contact pressure of ² , for example, a value measured by FS-60DS manufactured by Daiei Scientific Seiki Co., Ltd. However, the area of the contact piece can be changed in accordance with the size of the test piece for measurement.

In the body fluid absorbing portion 20, the core material 37 formed by coating the body fluid absorbent material 36 such as a mixture of the pulverized pulp and the pulverized pulp and the superabsorbent polymer particles with a liquid permeable polishing sheet (not shown) is further The liquid permeable sheet member 38 and the liquid-impermeable sheet member 39 are covered. The liquid permeable sheet member 38 is a surface that covers the inner surface of the core member 37, that is, the surface facing the user's skin, and can pass the discharged body fluid toward the core material 37, and is made of a non-woven fabric and an apertured plastic film. form. The liquid-impermeable sheet-like member 39 has a surface facing the outer surface of the core member 37, that is, a surface facing the user's clothing (not shown), and prevents the body fluid absorbed by the core material 37 from leaking from the core material 37. And a case where the liquid-impermeable moisture-permeable plastic film 39a is formed; and a bonding means for transmitting a heat-fusible adhesive or the like on the outside of the liquid-impermeable moisture-permeable plastic film 39a and the plastic film 39a thereof ( The case where the non-woven fabric 39b made of the thermoplastic synthetic fiber to be joined is formed.

Further, in the present invention, the liquid-impermeable, moisture-permeable plastic film has a liquid-repellent property of 1000 mm‧H ₂ O or more as defined by JIS L1092B, and has a moisture permeability defined by JIS Z0208. It is a moisture permeability of 3,000 g/m ² ‧day or more. The liquid-impermeable moisture-permeable plastic film 39a is conventionally used in the art, and in one example, it has a polyethylene film having a thickness of 0.01 to 0.03 mm containing fine particles of barium sulfate and calcium carbonate. In the liquid-impermeable sheet-like member 39 of the body fluid absorbing portion 20, the non-woven fabric bonded to the liquid-impermeable moisture-permeable plastic film 39a is not indispensable, but serves as a surface protective material for the plastic film 39a. Usefully, it is possible to prevent the plastic film 39a from being broken and the plastic film 39a from being scratched. In the nonwoven fabric, it is formed of a thermoplastic synthetic fiber having a fineness of 1 to 8 dtex, and a mass having a mass of 7 to 20 g/m ² is used.

As shown in Fig. 3, the distal end portion 21 and the rear end portion 22 of the body fluid absorbing portion 20 are superposed on each other by laminating the liquid permeable sheet member 38 and the liquid-impermeable sheet member 39 extending from the core member 37. Heat fusion adhesives (not shown) are formed by joining each other, and do not include a portion of the core material 37. However, most of the front end portion 21 and/or the rear end portion 22 may be formed only by the liquid-impermeable sheet-like member 39. In the front-rear direction C, a core material 37 is provided in a portion between the front end portion 21 and the rear end portion 22. The body fluid absorbing portion 20 is separable in the non-joining state of the covering portion 15 at least in the lowermost portion 14a (refer to the first drawing) of the lower femoral region 14, and a gap 45 can be formed between the covering portion 15 and the body fluid absorbing portion 20.

As shown in Fig. 4, a leakage preventing wall 41 is formed on both sides in the lateral direction B of the body fluid absorbing portion 20. The leakage preventing wall 41 is preferably formed of a liquid-impermeable sheet or a water-repellent sheet, but in the illustrated example, a liquid-impermeable and moisture-permeable plastic film of the liquid-impermeable sheet-like covering member 39 is formed. The 39a and the nonwoven fabric 39b covering the plastic film 39a are formed by using a portion extending from the both side portions of the core member 37 in the lateral direction B. However, the non-woven fabric 39b in this portion is folded back as shown in the figure at the portion which becomes the top portion 42 of the leakage preventing wall 41. In the inner side of the top portion 42 of the leakage preventing wall 41, the elastic member 43 extending in the front-rear direction C is mounted in an extended state. When the diaper 10 bends the body fluid absorbing portion 20 in the front-rear direction C in the wearing state, the elastic member 43 can be contracted in the front-rear direction C to collapse the leakage preventing wall 41 at the side edge 25 of the body fluid absorbing portion 20 into a broken line, and The body fluid absorbing portion 20 which is suspended by the self-weight from the edge portions 12b and 13b of the iliac surrounding opening 16 to which the distal end portion 21 and the rear end portion 22 are attached can increase the covering portion 15 and the body fluid absorbing portion by the force in the lifting direction. A gap 45 between 20.

In the covering portion 15 of the third and fourth drawings, it is apparent that the inner surface 18 of the portion facing the body fluid absorbing portion 20 is flat, and the pleats 40 are formed on the outer surface 19. The elastic member 11 around the leg does not impair the formation of the wrinkles 40 in the covering portion 15, and the width is narrow. In one of the examples, the elastic member 11 around the leg can be used in a state in which a belt having a width of 15 to 30 mm has a width of only 3-5 mm and is overlapped with the covering portion.

FIG. 5 is a view illustrating a part of a manufacturing process of the sheet member 30 used in the covering portion 15.

In the process 501 of Fig. 5, the elastic net 531 having the width W ₀ for obtaining the inner layer portion 31 among the sheet-like members 30 is continuously supplied in the machine direction MD. The elastic mesh 531 has an upper surface 517 and a lower surface 518 which are flat and not formed with wrinkles. The elastic mesh 531 is elastically stretchable in the machine direction MD.

In the process 502, the required magnification of the length Z _{0 of the} elastic net 531 is elongated toward the machine direction MD by, for example, 1.5-3 times the length Z ₀ , and an elongated net 531a having a width W ₁ can be obtained.

In the process 503, the nonwoven fabric 532 used as the outer layer portion 32 in the sheet-like member 30 is supplied, and the heat-adhesive adhesive 535 is applied to the single surface of the nonwoven fabric 532 using a spreader 550 such as a curtain coater. smear. The nonwoven fabric 532 is an inelastic web which is not elastically stretched when supplied in the machine direction MD, and is bonded to the upper surface 517 of the elongated web 531a through the heat fusion adhesive 535 to obtain an elongated composite web 531b. The heat fusion adhesive 535 is a line 556 in which a plurality of discontinuous or continuous lines are drawn in the machine direction MD, and the lines 556 are applied in parallel with each other in the cross direction CD with a gap 557 therebetween.

In the process 504, the elongated composite web 531b is elastically contracted in the machine direction MD by releasing the elongated web 531a from the elongation operation thereto, thereby obtaining a continuous body of the sheet-like member 30, that is, the composite web 530 having the width W ₂ . . The composite mesh 530 has an upper surface 519 formed by a nonwoven web 532 and a lower surface 518 formed by an elastic mesh 531. In the composite net 530, the nonwoven fabric 532 is deformed in such a manner that its length is reduced in appearance, and wrinkles 540 are formed in the nonwoven fabric 532. In the nonwoven fabric net 532, in the portion where the heat-fusible adhesive 535 is joined to the elastic mesh 531, the wrinkles 540 are also formed with the raised portion 40b having a low height (refer to Figs. 1 and 4). The tendency of the fine wrinkles 540a is such that, in the unbonded portion of the elastic web 531 to which the heat fusion adhesive 535 is not applied, for example, the gap 557 has a large wrinkle 540b formed with a raised portion 40b having a high height. tendency. The lower surface 518 of the elastic mesh 531 in the composite mesh 530 is not as flat as the lower surface 518 of the elastic mesh 531 supplied in the process 501.

The composite mesh 530 is used in such a manner that the machine direction MD is in the lateral direction B of the diaper 10, and in a state in which the length Z _{2 is} elastically stretched to a desired elongation ratio, for example, a composite mesh in a state of being contracted In a state in which the length of the 530 is extended by 1.5 to 3 times, the body fluid absorbing portion 20 in Fig. 2 is attached to the lower surface 518 of the elastic mesh 531, and the belt member 23 is further increased in magnification at the same magnification as that of the composite mesh 530, or It is installed in a state in which it is stretched at a higher magnification than its elongation ratio. Next, a notch portion (not shown) corresponding to the shape of the lower femoral region 14 in the covering portion 15 of Fig. 2 is formed into a composite mesh 530. The elastic member 11 around the leg in the extended state is attached to the composite web 530 along the notch portion by a heat fusion adhesive (refer to Fig. 2). The composite mesh 530 may have a notch portion when it is in an extended state, and may be attached to the body fluid absorbing portion 20 after the leg elastic member 11 is attached.

As such, a continuum of the stretch diaper 110 as shown in Fig. 2 can be obtained from the composite web 530. The continuum that travels in the machine direction MD is joined to the portion that becomes the side portions 12a and 13a of the diaper 10 in the intersecting direction CD so that the body fluid absorbing portion 20 is superposed. Thereafter, individual diapers 10 can be obtained by cutting the continuum at a desired location.

Further, in the present invention, the surface of the inner surface 18 or the like is flat, and it means that the cross section in the thickness direction in which the range of 1 cm × 1 cm and the range thereof are arbitrarily selected from the surface thereof is enlarged and observed using a magnifying glass of 10 times. It is not possible to find both the valley portion and the ridge portion (for example, the valley portion 40a and the ridge portion 40b) in a state in which the wrinkles (for example, the wrinkles 40 (references 1 and 4)) are parallel to each other. status.

Further, in the present invention, the sheet-like member and the sheet-like web, and the thread used for producing the member and the web are elastically stretchable, as follows. From the member and the net, a test piece having a length of 50 mm and a width of 10 mm was taken, and five bundles of test pieces having a length of 50 mm were prepared from the line for fabricating the member and the net, and the test piece or both ends of the test bundle were each 10 mm. The tray of the tensile tester was gripped, and the size L ₀ between the disks was extended to 2 times by the speed of 50 mm/min. After the elongation, the test piece or the test bundle was immediately removed from the tray for 60 seconds, and the placed size L of the portion corresponding to the size L ₀ was obtained. When the dimension L is a size of 1.5 times or less the dimension L ₀ , the sheet-like member and the mesh and the wire are elastically stretchable. Elastically extensible members and meshes, also known as elastic members, elastic nets, elastic threads, or elastic members, elastic mesh, elastic threads. In the case of the line crimping, the line to be crimped is taken along a ruler, and the straight line distance between both ends of the line in the crimped state is obtained, and the distance is defined as the dimension L ₀ . Further, when there is a case where the size L is different between the five lines, the average value of the size L is compared with the size L ₀ .

Fig. 6 is a view showing another example of the manufacturing process of the sheet member 30.

In the process 601 of Fig. 6, the elastic web 631 having the width W ₀ for obtaining the inner layer portion 31 in the sheet-like member 30 is continuously supplied toward the machine direction MD. The elastic mesh 631 is elastically stretchable toward the crossing direction CD with respect to the machine direction MD.

In the process 602, the width W ₀ of the elastic mesh 631 is made to a desired magnification, for example, 1.5 to 3 times its width W ₀ , and the width is expanded to obtain a widened mesh 631a having a width W ₁ . The widened mesh 631a is a length Z ₁ having a corresponding length Z ₀ in the elastic mesh 631.

In the process 603, the non-elastic mesh which is used as the outer layer portion 32 in the sheet-like member 30, that is, the nonwoven fabric 632 is supplied, and the heat-adhesive adhesive 635 is applied to the non-woven fabric 650 using a curtain coater or the like. Weaving net 632. The heat fusion adhesive 635 is a line 656 in which a plurality of discontinuous or continuous lines are drawn in the machine direction MD, and the lines 656 are applied in such a manner that the gaps 657 of the same size are juxtaposed in the cross direction CD. Next, the nonwoven fabric mesh 632 and the widened mesh 631a are joined by a heat fusion adhesive 635 to obtain a widened composite mesh 631b.

In the process 604, by widening the widened mesh 631a from the widening operation thereto, the widened composite mesh 631b is elastically contracted toward the intersecting direction CD, thereby obtaining a continuous body of the sheet-like member 30, that is, having a width W ₂ Composite mesh 630. When the width W _2, become almost the same general width W _0, or a value larger than the width W _0. The composite mesh 630 has an upper surface 619 which is divided by the nonwoven fabric mesh 632, and a lower surface 618 which is divided by the elastic mesh 631. In the composite web 630, the nonwoven web 632 forming the widened composite web 631b is deformed in such a manner that its width is small, and wrinkles 640 are formed in the nonwoven web 632. In the pleats 640, in the nonwoven fabric 632, the portion where the wire 656 that has passed through the heat-adhesive adhesive 635 is bonded to the elastic mesh 631 and is fixed is the valley portion 40a (refer to Figs. 1 and 4), which is located at line 656. The portion of the gap 657 formed by the line 656 is swelled in the thickness direction of the nonwoven fabric 632 in the cross direction CD to form the ridge portion 40b (refer to Figs. 1 and 4).

The composite mesh 630 is used in such a manner that the cross direction CD becomes the lateral direction B of the diaper 10, and in a state where the width is elastically widened until the required widening magnification, for example, the width of the composite mesh 630 is directed in the intersecting direction. In the state in which the CD is widened to a maximum of 1.5 to 3 times, the body fluid absorbing portion 20 in the second embodiment is attached to the lower surface 618 of the elastic mesh 631, and is further installed in a state in which the expansion ratio of the composite mesh 630 is extended at the same magnification. Belt member 23. Next, by cutting the both sides of the composite mesh 630 so as to become the shape of the lower femoral region 14 in the covering portion 15 of Fig. 2, the stretch diaper as shown in Fig. 2 can be obtained from the composite net 630. A continuum of 110. Further, the composite mesh 630 may be cut off before the body fluid absorbing portion 20 is attached. The obtained continuum is obtained by cutting a desired position in the continuous body while walking in the machine direction MD to obtain an individual stretch diaper 110. In the stretch diaper 110, the lower surface 618 of the elastic net 631 is an inner surface 18, and the upper surface 619 formed by the nonwoven fabric 532 is folded so as to become the outer surface 19, and the both sides of the stretch diaper 110 are joined to obtain a diaper. 10.

In the diaper 10, the covering portion of the sheet-like member 30 obtained from the composite webs 530 and 630 illustrated in Figs. 5 and 6 is used. In the case where the anterior and posterior condyle 12 and the posterior condyle 13 are elastically extended by 1.5 to 3 times in the lateral direction B, it is preferable that the size of the diaper 10 is a desired value.

Fig. 7 is a view showing the use of the ultrasonic fusion splicer 750 in place of the applicator 550 in the process 503 of the fifth drawing and the applicator 650 in the process 603 of the sixth drawing. The ultrasonic welding machine 750 has a grinding head 750a and an anvil 750b. In the ultrasonic welding machine 750 used in place of the applicator 550, the elongate mesh 531a and the non-woven net 532 in Fig. 5 are superposed so as to be supplied between the grinding head 750a and the anvil 750b while traveling in the machine direction MD. . The grinding head 750a is a columnar body that rotates in the machine direction MD, and a plurality of protrusions 751 that are ultrasonically vibrated are formed on the circumferential surface thereof. The overlapped elongated mesh 531a and the nonwoven fabric 532 are welded to each other by the portion of the anvil 750b that receives the projection 751 in the grinding head 750a, thereby forming the elongated composite mesh 531b.

The covering portion 15 and the body fluid absorbing portion 20 are formed as exemplified in Figs. 1-4, and the sheet member 30 in the covering portion 15 is used in the diaper 10 in the case of the composite web 530 illustrated in Figs. The color of the covering portion 15 and the body fluid absorbing portion 20 is formed by forming the gap 45 between the covering portion 15 and the body fluid absorbing portion 20, and the body fluid absorbing portion 20 is difficult to see through from the outside of the covering portion 15, and the appearance of the diaper 10 is obtained. It is not easy to catch up. Further, in the outer surface 19 of the covering portion 15, by forming the wrinkles 40, in other words, the fibers forming the outer layer portion 32 of the sheet-like member 30 are the ridges 40b forming the wrinkles 40, even if light is directed from the body fluid absorbing portion 20 The covering portion 15 is scattered, and the body fluid absorbing portion 20 is also difficult to see through, and its existence is from The outer side of the covering portion 15 is not conspicuous.

Further, in the diaper 10, when the liquid-impermeable plastic film 39a used in the body fluid absorbing portion 20 rubs the inner surface 18 of the covering portion 15, a peculiar harsh rubbing sound is generated in the plastic film. However, in the diaper 10, even if the wrinkles 40 are formed on the outer surface 19 of the covering portion 15, since the inner surface 18 can be in a flat state without wrinkles, in the diaper 10 in such an aspect, The diaper in which the wrinkles are formed on the inner and outer surfaces of the covering portion is different, and the occurrence of the rubbing sound of the plastic film can be suppressed. Moreover, the diaper 10, whether worn or worn, is less pleasant (uncomfortable) to the user and others by the harsh sound.

Fig. 8 is a partial cross-sectional view showing the covering portion 15 in a state of contraction in an example of the embodiment, wherein (1) shows a cross section in the longitudinal direction A of the diaper 10, and (2) shows in the display (1). BB line profile. The sheet-like member 30 in the covering portion 15 is composed of an inner layer portion 31, an outer layer portion 32, and a plurality of linear elastic members 50 positioned between the two portions 31, 32. The inner layer portion 31 and the outer layer portion 32 are at least one, and for example, the outer layer portion 32 is formed of a non-elastic nonwoven fabric and is non-extensible in the lateral direction B. In the state in which the elastic member 50 is elongated in the lateral direction B, it is preferably stretched by a heat fusion adhesive (not shown) in a state in which it is preferably extended by 1.5 to 3 times the length in the contracted state. Its non-elastic non-woven fabric. In the diaper 10 and the unfolding diaper 110, the elastic member 50 is shrunk in the lateral direction B, and a large number of wrinkles 40 are formed in the outer layer portion 32. In the diaper 10, the covering portion 15 is an elastically stretchable and contractible elastic force in the lateral direction B. As the member, the linear elastic member 50 may be used. When the inner layer portion 31 is formed of a non-elastic sheet-like member, that is, a non-woven fabric, the elastic member 50 is not the outer layer portion 32 but the inner layer portion 31 is joined or the two portions 31, 32 are joined, and the inner layer portion 31 is It is also possible to form the wrinkles 40. The covering portion 15 in the case where the wrinkles 40 are formed in the inner layer portion 31 can be utilized for the presence of the concealed body fluid absorbing portion 20.

The disposable pants type diaper of the present invention disclosed above can be organized into at least the following items.

(1) A diaper which is a disposable pants type diaper having a longitudinal direction, a lateral direction, and a front-rear direction which are perpendicularly intersected with each other, and has an inner surface formed by a peripheral region of the front sac and a region surrounding the sac and a sub-femoral region And a body fluid absorbing portion that includes a core material that extends from the lower femoral region to the anterior iliac crest region and the posterior condylar region and includes a body fluid absorbing property, and the outer surface of the outer layer The covering portion includes at least one of the elastic member that can be elastically stretched and contracted in the lateral direction, and at least one of the inner surface and the outer surface, and is not elastically stretched by the lateral direction. The non-elastic sheet-like member is joined to the inelastic sheet-like member in an extended state of the elastic member, and when the elastic member is contracted, a plurality of wrinkles are formed in the non-elastic sheet-like member, and the body fluid is absorbed. The outer surface side facing the inner surface of the covering portion and the opposite side, that is, the inner surface side, and the outer surface side is for the covering portion Engaging the inner surface of said surrounding barrel domain after the domain and at least the front torso surrounding region and in the region around the trunk and the femoral region at the front around the barrel, at the outer side, next to the share The inner surface of the domain is in a non-joined state in at least a part of the central portion in the lateral direction and the both side portions in the lateral direction, and the part and the both side portions are in the lateral direction Connected in the joined state.

(2) The elastic member in the covering portion is an elastic sheet-like member.

(3) The elastic sheet-like member is any one of an elastic nonwoven fabric and an elastic plastic film which are elastically stretchable and contractible in the lateral direction, and the non-elastic sheet-like member is inelastic non-woven. cloth.

(4) The aforementioned wrinkles are formed in the aforementioned sub-femoral region.

(5) The aforementioned inner surface of the aforementioned sub-sand field is flat.

(6) The elastic member in the covering portion is a plurality of linear elastic members extending in parallel in the lateral direction, and the inelasticity of at least one of the outer surface and the inner surface is formed. The sheet-like members are joined in an elastically stretched state.

(7) The aforementioned part of the body fluid absorbing portion faces the lowermost portion of the lower femoral region of the covering portion.

(8) The central portion of the body fluid absorbing portion is a portion other than the aforementioned portion, that is, a dimension in the lateral direction of not more than 30 mm, and is joined to the inner surface of the lower femoral region.

5‧‧‧Hot fusion adhesive

11‧‧‧ Elastic members around the leg

12‧‧‧ Front and rear domains

12a‧‧‧lateral edge

12b‧‧‧胴 Around the edge of the opening

13‧‧‧After the surrounding area

13a‧‧‧lateral edge

13b‧‧‧胴 Around the edge of the opening

14‧‧‧Under the field

14a‧‧‧Bottom

14b‧‧‧ Both sides

15‧‧‧The Ministry of Coverage

18‧‧‧ inside

19‧‧‧ outside

20‧‧‧ body fluid absorption department

20a‧‧‧Central Department

20b‧‧‧ both sides

21‧‧‧ front end

22‧‧‧ Back end

23‧‧‧With components

25‧‧‧ both sides

30‧‧‧Sheet members

41‧‧‧Leakproof wall

43‧‧‧Flexible components

110‧‧‧ diapers

Claims (8)

A diaper which is a disposable shorts type diaper having a longitudinal direction and a transverse direction and a front-rear direction which are perpendicularly intersected with each other, and has an inner surface and an outer surface by a peripheral region of the front sill and a region surrounding the sac and a sub-femoral region. In the underpants-type covering portion, a body fluid absorbing portion that extends from the lower femoral region to the front sacral region and the sacral region and includes a body fluid absorbing core material is attached to the inner surface, and is characterized in that: The covering portion includes an elastic member that can be repeatedly stretched and contracted in elasticity in the lateral direction, and an inelastic member that forms at least one of the inner surface and the outer surface and is elastically stretchable in the lateral direction. The sheet-like member is joined to the inelastic sheet-like member in an extended state of the elastic member, and when the elastic member is contracted, a plurality of wrinkles are formed in the non-elastic sheet-like member, and the body fluid absorbing portion has The outer surface side facing the inner surface of the covering portion and the opposite side thereof are the inner surface side, and the outer surface side is the front side of the covering portion The inner surface of the anterior condyle, the at least the anterior condyle, and the anterior subtalar region are joined to the inner surface of the sacral region, and the inner surface of the sac region is At least a part of the central portion in the lateral direction and a side portion of the lateral direction are in a non-joined state, and the part and the both side portions are connected in the non-joined state in the lateral direction. The diaper of claim 1, wherein the elastic member in the covering portion is an elastic sheet-like structure Pieces. The diaper according to the second aspect of the invention, wherein the elastic sheet-like member is any one of an elastic nonwoven fabric and an elastic plastic film which are elastically stretchable and contractible in the lateral direction, and the inelastic The sheet-like member is a non-elastic nonwoven fabric. The diaper according to any one of claims 1 to 3, wherein the pleats are formed in the aforementioned sub-sand. The diaper according to any one of claims 1 to 4, wherein the inner surface of the lower strand field is flat. The diaper according to the first aspect of the invention, wherein the elastic member in the covering portion is a plurality of linear elastic members extending in parallel in the lateral direction, and the outer surface and the inner surface are formed At least one of the non-elastic sheet-like members is joined in a state of being elastically stretched. The diaper according to any one of claims 1 to 6, wherein the part of the body fluid absorbing portion faces the lowermost portion of the lower femoral region of the covering portion. The diaper according to any one of the first to seventh aspects of the invention, wherein the central portion of the body fluid absorbing portion is a portion other than the portion, that is, a dimension in the lateral direction of not more than 30 mm, and a front portion The aforementioned inner surface joint of the lower field.