TWI573580B - Dispose of items with disposable dessert - Google Patents

Description

Disposable wearing items

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a disposable wearing article, and more particularly to a pants-type disposable diaper having a waist elastic body, and a disposable toilet learning pants. Disposable wearing articles such as disposable incontinence pants.

Conventionally, disposable wearing articles having a waist elastic body have been known. For example, Patent Document 1 discloses an absorbent body including a strip-shaped or linear leg elastic body extending from a crotch region toward the front and rear waist regions and having a plurality of strips on both sides; and extending laterally in the front and rear waist regions. A plurality of strip-shaped or linear waist elastic body front and back waist sheets are used for disposable wearing articles.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2011-98052

According to the disposable wearing article disclosed in Patent Document 1, since the elastic side of the leg elastic body having the absorbent body is fixed to the absorbent body in a state in which the front waist region is undulated toward the lateral inner side, and thereafter The waist region is fixed to the back waist sheet in the state of the lateral side of the lateral direction. Therefore, the leakage of the body fluid from the front waist region is less likely to occur due to the elastic stress of the elastic side and the waist elastic body, and the elasticity is caused in the back waist region. The distance between the sides becomes large, and the width of the absorbent body does not become small, so that the hips are not exposed to a large extent during wearing.

However, since the elastic waist side is fixed to the absorber in a state where the elastic side is undulated outward in the lateral direction, the width of the underarm region is gradually increased from the front toward the rear, and the front and rear waists are pulled up. In the field, the rear side of the underarm area cannot be fully pulled up, which creates a gap between the wearer's body and the underarm area, and the leakage of body fluid occurs. Moreover, when the hair is pulled up reluctantly, the edge of the leg opening is caught between the wearer's groin, and a part of the buttocks may leak out.

An object of the present invention is to provide an improvement in the conventional disposable wearing article, which does not expose the buttocks during wearing, and prevents the body fluid from being adhered to the wearer's body by the edge of the leg opening. Disposable wearing items for leaking situations.

In order to solve the above problems, the present invention relates to a lateral direction and a lateral direction orthogonal thereto, and includes: a skin facing surface and a non-skin Opposite surface; front waist region; back waist region; ankle field located between the front and rear waist regions; an annular elastic waist sheet forming the front and rear waist regions; and an underarm sheet forming the aforementioned underarm region; A disposable wearing article that is attached to the absorbent body of the elastic waist sheet.

The wearing article of the present invention is characterized in that the front and rear waist regions respectively have inner and outer end edges which are opposed to each other in the longitudinal direction, and the underarm sheet extends in the longitudinal direction and includes elastically stretchable leg elastic bodies. The leg elasticized sheet of the pair of legs, the effective elongation dimension at the maximum elongation of the leg elasticized sheet is larger than the aforementioned longitudinal separation dimension from the inner end edge of the front waist region to the inner end edge of the rear waist region.

In the disposable wearing article of the present invention, the effective elongation dimension at the maximum elongation of the pair of leg elasticized sheets attached to the both side edges of the underarm sheet is larger than the inner edge of the front waist region The aforementioned longitudinal separation dimension of the inner end edge of the rear waist region is larger, so that the leg opening edge portion is elongated along the wearer's thigh portion to be fitted. In this way, since the leg opening edge portion is appropriately extended in accordance with the size of the circumference of the wearer's thigh portion, the central portion of the underarm region is not separated from the wearer's body, and the side leakage of the body fluid can be surely prevented. . Further, when worn, there is no case where the leg opening edge portion is caught between the wearer's groin and a part of the buttocks leaks to the outside.

10‧‧‧Disposable wearing items (disposable diapers)

11‧‧‧Acceptor

12‧‧‧Flexible waist flakes

13‧‧‧胯下片

14‧‧‧ Front waist

15‧‧‧Back waist area

16‧‧‧胯下域

18a‧‧‧The lower end of the front waist region (the inner edge of the front waist sheet)

18b‧‧‧The upper edge of the front waist region (the outer edge of the front waist sheet)

18c, 18d‧‧‧ side edge of the front waist

19a‧‧‧The lower edge of the back waist

19b‧‧‧The upper edge of the back waist

19c, 18d‧‧‧ the side edge of the front waist

42‧‧‧Basic thin slices

43‧‧‧ leg elasticized sheet

50‧‧‧ leg elastomer

61‧‧‧1st flexfield

62‧‧‧1st non-elastic domain

63‧‧‧2nd flexfield

64‧‧‧2nd non-elastic domain

66‧‧‧1st intersection

67‧‧‧2nd intersection

The longitudinal separation of the inner end edge of the L2‧‧ front waist region and the inner end edge of the back waist region

Effective elongation dimension at maximum elongation of L4‧‧‧ leg elasticized sheets

Horizontal dimension of the first intersection of R1‧‧

Horizontal dimension of the second intersection of R2‧‧

Horizontal dimension of the W1‧‧1 first elastic domain

Horizontal dimension of the W3‧‧1 first inelastic domain

Horizontal dimension of the W4‧‧‧2nd elastic domain

Horizontal dimension of the W5‧‧‧2nd inelastic domain

X‧‧‧ Landscape

Y‧‧‧ portrait

Fig. 1 is a perspective view showing a disposable diaper as an example of the disposable wearing article of the present invention.

Fig. 2 is a partially broken plan view showing a portion of the diaper which is stretched in the longitudinal direction and the lateral direction until the maximum elongation of each elastic body.

Fig. 3 is an exploded perspective view of the diaper.

Fig. 4 is an exploded perspective view of the underarm sheet.

Fig. 5 is a cross-sectional view taken along line V-V of Fig. 2;

Fig. 6 is a cross-sectional view taken along line VI-VI of Fig. 2;

Fig. 7 is a developed plan view similar to Fig. 2, showing an extended state of the leg elasticized sheet by an imaginary line.

Fig. 8 is a perspective view showing a state in which a diaper is worn.

[Fig. 9] (a) is a schematic view showing an example of a manufacturing apparatus of a squat sheet, and (b) is a view showing a state of a continuous composite of a manufacturing process of a squat sheet.

[Fig. 10] (a) is a schematic view showing another example of the apparatus for manufacturing the underarm sheet, and (b) is a view showing a state of the continuous composite of the manufacturing process of the underarm sheet.

Fig. 11 is a view showing a meshing portion of a pair of gear rolls of a crease forming process of the manufacturing apparatus.

[Formation for carrying out the invention]

Referring to Figures 1 to 3, the disposable diaper 10 comprises: a longitudinal axis P and a horizontal axis Q; a longitudinal direction Y and a lateral direction X; the opposite side of the skin and the position a non-skin opposing surface on the opposite side; an annular elastic waist sheet 12 extending in the waist direction; an absorbent body 11 joined to the skin facing surface of the elastic waist sheet; and being attached to the elastic waist sheet 12 The elastic squat sheet 13 on the opposite side of the skin. Further, the diaper 10 has a front waist region 14; a rear waist region 15; an underarm region 16 positioned between the front and rear waist regions 14, 15 and symmetrical with respect to the longitudinal axis P.

The elastic waist sheet 12 has an elastic band function for fixing the absorbent body 11 to the underarm of the wearer, and has a front waist sheet 18 forming the front waist region 14, and a back waist sheet forming the back waist region 15. Body 19. The front waist sheet 18 has a horizontally rectangular shape defined by the inner end edge 18a, the outer end edge 18b, and the side edges 18c, 18d between the inner and outer end edges 18a, 18b. The back waist sheet 19 has a horizontally rectangular shape defined by the inner end edge 19a, the outer end edge 19b, and the side edges 19c, 19d between the inner and outer end edges 19a, 19b. The side edges 18c, 18d of the mutually facing front waist sheet 18 and the side edges 19c, 19d of the back waist sheet 19 are overlapped with each other, and the joint portion 20 intermittently arranged in the longitudinal direction Y is known by a known means. For example, the waist opening 22 and the pair of leg openings 23 are defined by thermal fusion means such as hot embossing, ultrasonication or the like.

The front and rear waist sheets 18 and 19 have inner sheet sheets 24 and 25 positioned on the opposite side of the skin, and outer sheet sheets 26 and 27 on the non-skin facing side. The outer sheets 26, 27 are larger in the longitudinal direction than the inner sheets 24, 25, and extend from the inner and outer end edges of the inner sheet 24 toward the outer side of the longitudinal direction Y.

In the outer sheet 26, 27, an SMS (spunbond, meltblown, spunbond) fiber nonwoven fabric, a spunbonded nonwoven fabric, a hot air non-woven fabric, a plastic sheet, or any of the foregoing fiber non-woven fabrics and plastic sheets having a mass of about 15 to 30 g/m ² can be used. Laminates, etc. The inner sheets 24, 25 and the outer sheets 26, 27 are joined by a hot melt adhesive applied to at least one inner surface or a known hot melt means.

An elastic fiber non-woven fabric may be used for the inner layer sheets 24, 25, and for example, may have a spunbonded nonwoven fabric, a meltblown microfiber nonwoven fabric, a hot rolled fiber nonwoven fabric, an SMS fiber nonwoven fabric, an air flow forming fiber nonwoven fabric, and a hot air fiber nonwoven fabric. The well-known elastic fiber nonwoven fabric is formed or formed by combining them. The elastic nonwoven fabric is, for example, an elastomer resin formed of polyethylene or polyurethane, or a thermoplastic resin formed of polyethylene, polypropylene, polyester, acrylic or the like. In the inner layer sheets 24 and 25, a non-elastic fiber nonwoven fabric may be used. However, as will be described later, since the inner layer sheet 25 of the back waist region 14 directly contacts the wearer's body, in order to make the softness and the skin touch Since the feeling is improved, it is preferable that at least the inner layer sheet 25 is an elastic fiber non-woven fabric.

Referring to Fig. 2 and Fig. 3, between the inner layer sheets 24 and 25 and the outer layer sheets 26 and 27, the center portion of the front and rear waist regions 14 and 15 in the lateral direction X is printed on the non-skin contrast surface from the outside. The graphic display sheets 28 and 29 formed of a plastic material such as a visible pattern (not shown). In the front and rear waist sheets 18, 19, the extended portions of the outer sheets 26, 27 extending from the outer edge of the inner sheets 24, 25 further outward in the longitudinal direction Y are folded back toward the inside, by folding back a plurality of strip-shaped or linear first and second elastic bodies formed in the formed bent portions 26a and 27a 31, 32 are shrinkably fixed by elongation through a hot melt adhesive. Further, in the extended portions 26b and 27b of the outer layer sheets 26 and 27 extending from the inner end edges of the inner layer sheets 24 and 25 toward the outer side of the longitudinal direction Y, an elongated fixing sheet 30 formed of a fiber nonwoven fabric is disposed. Between the fixed sheet 30 and the extended portions 26b and 27b, the strip-shaped or linear third and fourth elastic bodies 33 and 34 are retractably fixed by elongation through a hot-melt adhesive.

The front waist region 14 has an outer end portion 35 in which the first elastic body 31 is disposed, an inner end portion 36 in which the third elastic body 33 is disposed, and an intermediate portion 37 positioned between the outer inner end portions 35 and 36. The rear waist region 15 has an outer end portion 38 in which the second elastic body 32 is disposed, an inner end portion 39 in which the fourth elastic body 34 is disposed, and an intermediate portion 40 positioned between the outer inner end portions 38 and 39. The elastic inner sheets 24, 25 are disposed in the intermediate portions 37, 40 of the regions where the respective elastic bodies are not disposed. Therefore, at the time of wearing, the outer end portions 35, 38 and the inner end portions 36, 39 of the front and rear waist regions 14, 15 are stably attached to the wearer's body by the contraction force of each elastic body, and Since the portions 37 and 40 are attached to the wearer's body by the contraction force of the inner sheets 24 and 25, the diaper 10 does not have a large positional deviation of the degree of leakage of the body fluid during the wearing.

The underarm sheet 13 has a base sheet 42 positioned at the center portion of the lateral direction X, and a pair of leg elastic sheets 43 fixed to the skin facing surfaces of both side portions of the base sheet 42. The base sheet 42 is composed of an inner sheet 44 positioned on the opposite side of the skin and an outer sheet 45 positioned on the non-skin facing side. Although various well-known fiber nonwoven fabrics or plastic films can be used for the inner and outer sheets 44, 45, the inner sheet is 44 bits. The position facing the absorber 11 is preferably formed of a leak-proof plastic film, and since the outer sheet 45 is a part of the outer surface of the diaper 10, it is a fiber non-woven fabric which is more sensitive to the skin than the plastic film. Formed as ideal.

The underarm sheet 13 has: front and rear end portions 46, 47; and an intermediate portion 48 positioned between the front and rear end portions 46, 47. The front and rear end portions 46 and 47 are fixed to the skin opposite sides of the inner end edges 18a and 19b of the front and rear waist sheets 18 and 19 via a joint region in which the hot-melt adhesive is applied to the non-skin opposing surface side. surface. Further, for the first to fourth elastic bodies 31, 32, 33, and 34, for example, an elastic yarn having a thickness of 470 to 780 dtex and an elongation ratio of 2.0 to 3.5 times can be used. In the leg elastic body 50, an elastic yarn having a thickness of 310 to 620 dtex and an elongation ratio of 2.0 to 3.0 may be used. In addition to the elastic yarn, each of the elastic members may be formed of a sheet-like elastic material formed of urethane or the like having a predetermined width and thickness.

The absorbent body 11 has an elongated gasket shape and includes: front and rear end portions 54, 55; an intermediate portion 56; an absorbent core 58 extending at least in the crotch region 16 toward the longitudinal direction Y; and a skin pair positioned on the absorbent core The body side pad 59 on the facing side and the covering sheet 60 on the non-skin opposing side of the absorbent core 58. In the absorbent body 11, the hot melt adhesive is applied to substantially the entire non-skin opposing surface in a well-known pattern. The front and rear end portions 54 and 55 are fixed to the skin facing surface of the front and rear waist sheets 18 and 19 via the hot melt adhesive, respectively, and the intermediate portion 56 is fixed to the skin of the underarm sheet 13 via the hot melt adhesive. Opposite. As shown in Fig. 3, the front end portion 54 of the absorbent body 11 is fixed to the skin of the inner layer sheet 24 of the front waist sheet 18 The rear end portion 55 is fixed to the skin facing surface of the outer layer sheet 27 between the inner layer sheet 25 of the back waist sheet 19 and the outer layer sheet 27. By fixing the distal end portion 54 of the absorbent body 11 to the skin facing surface of the inner layer sheet 24, the skin of the wearer directly contacts the relatively soft inner sheet 24 having elasticity and elasticity, so that the touch of the skin is improved. Further, since the rear end portion 55 is fixed between the inner layer sheet 25 and the outer layer sheet 27, the body fluid can be prevented even if the excreted body fluid diffuses and diffuses from the crotch region 16 to the absorber 11 located in the back waist region 15. Direct contact with the wearer's skin.

The absorbent core 58 has a mass of 400 to 600 g/m ² and is composed of a core material composed of a mixture of fluff pulp, superabsorbent polymer particles (SAP), and, optionally, a thermally fusible staple fiber. And a liquid-permeable fiber nonwoven fabric. As the body side liner 59, various well-known fiber nonwoven fabrics such as a liquid-permeable spunbond nonwoven fabric having a mass of about 10 to 30 g/m ² and an SMS nonwoven fabric can be used. As the coated sheet 60, a liquid-impermeable spunbonded nonwoven fabric having a mass of about 10 to 30 g/m ² , an SMS non-woven fabric, a laminated sheet of a plastic sheet or a fiber nonwoven fabric and a plastic sheet, or the like can be used. Although not shown, the body side pad 59 and the covering sheet 60 have an extending portion extending from the both side edges of the absorbent core 58 toward the outside of the lateral direction X, and by a plurality of strips or linear elasticities The body is telescopically fixed to the extension portion, and a three-dimensional side edge that rises toward the wearer's armpit may be formed when worn.

2 to 5, each leg elasticized sheet 43 has a plurality of strip-shaped or linear leg elastic bodies 50; and a cover sheet 51 covering the leg elastic body 50. The cover sheet 51 is fixed by folding one piece of fiber non-woven fabric or plastic sheet into two, and the leg elastic body 50 is via a hot melt adhesive. It is contracted in the bent portion where the cover sheet 51 is bent and fixed. The leg elasticized sheet 43 as a whole is contracted in the longitudinal direction Y, and is attached to the skin opposite surface of the base sheet 42 which is located further in the lateral direction X than the leg elasticized sheet 43 and the lower portion of the front and rear squat sheets. .

Referring to Fig. 5, the leg elastic body 50 is fixed in a bent portion of the cover sheet 51 via a joint portion 41 formed by a hot-melt adhesive applied to the entire circumference thereof, and the leg elasticized sheet 43 has a continuous longitudinal direction. The shape is undulating and a plurality of wrinkles 68 are formed. However, as long as the cover sheet 51 is attached in a state where the leg elastic body 50 is contracted, the joint portion 41 may be intermittently provided in the longitudinal direction Y over the entire circumference of the leg elastic body 50.

The inner surface sheet 44 constituting the base sheet 42 and the inner surface of the outer sheet 45 are coated with a hot-melt adhesive 69, and the inner portion of the leg elasticized sheet 43 is interposed via the hot-melt adhesive 69. The state between the sheet 44 and the outer sheet 45 is fixed. In the inner portion of the base sheet 42 which is fixed to the inner side of the lateral direction X of the leg elastic body 50 in the leg elasticized sheet 43, in order to stably fix the leg elasticized sheet 43 to the base sheet 42 between the cover sheets 51 A thin strip-shaped reinforcing sheet 52 is interposed and fixed via a hot melt adhesive.

Referring to Fig. 6, the inner side portion of the leg elasticizing sheet 43 is fixed between the inner and outer sheets 44, 45 in a non-stretched state via a hot melt adhesive 69. Therefore, the leg elasticized sheet 43 is stretchable only by the outer side portion where the leg elastic body 50 is disposed.

Referring to Fig. 7, the dimension Y1 of the longitudinal direction Y of the diaper 10 is about 450 to 550 mm, and the dimension W1 of the lateral direction X of the diaper 10 is about 320~. 380 mm, the dimension Y2 of the longitudinal direction Y of the underarm region 16 is about 200 to 280 mm, and the dimension of the longitudinal direction Y of the side edge 18d of the front waist region 14 is the same as the dimension of the longitudinal direction Y of the side edge 19d of the back waist region 15 L3 is about 100. ~140mm.

The first elastic region 61 in which the third elastic body 33 is disposed is defined in the inner end portion 36 of the front waist region 14; and the third elastic body 33 is disposed in the lateral direction X between the first elastic regions 61. The first inelastic field 62. The inner end portion 39 of the front waist region 15 defines a second elastic region 63 in which the fourth elastic body 34 is disposed, and a fourth elastic body 34 in which the second elastic region 63 is not disposed in the lateral direction X. The second inelastic domain 64. For the size of each region, the dimension W2 of the lateral direction X of the first elastic domain 61 is about 120 to 140 mm, the dimension W3 of the lateral direction X of the first inelastic domain 62 is about 60 to 100 mm, and the lateral direction of the second elastic domain 63 is X. The dimension W4 is about 60 to 90 mm, and the dimension X of the lateral X of the second inelastic region 64 is about 170 to 210 mm.

In the method of forming the first non-elastic domain 62 (the method of forming the second non-elastic domain 64 is also the same), for example, the hot-melt adhesive is applied to the portion of the first elastic domain 61 forming the outer layer sheet 26 in an appropriate pattern. The inner surface of the third elastic body 33 is supplied to the coating region of the adhesive agent in the respective fields, and is fixed to the coating region of the adhesive. In this state, the third elastic position of the first non-elastic region 62 is cut. In the case of the body 33, since the third elastic body 33 is not fixed by the above-mentioned adhesive in the first non-elastic domain 62, it is automatically contracted (instantaneous return). Therefore, in the first non-elastic domain 62, the third elastic body 33 having a contracting force does not substantially exist. Here, "substantially absent" means that the third elastic body 33 is given to the first non-elastic domain 62. When the plurality of the third elastic bodies 33 are extremely short in the first non-elastic region 62, the plurality of the third elastic bodies 33 may remain in the plural. In this manner, it is preferable that the third elastic body 33 does not remain so as to return instantaneously in one cut, and the third elastic body 33 located in the first non-elastic region 62 may be replaced by such a cutting process. Remove all.

The first and second inelastic domains 62, 64 can be defined in other methods, and are not limited to the aforementioned processing methods. For example, the third elastic body 33 which is required to be positioned in the first non-elastic domain 62 is not elongated and is placed in the first non-elastic domain 62. At this time, a hot-melt adhesive may be applied to the first non-elastic region 62, and the third elastic body 33 in a natural state which is not elongated may be fixed thereto. Further, for example, in a state where the contractility of the elongated third elastic body 33 in the first non-elastic region 62 and the elongation is suppressed, the inelasticity can be made. As described above, the "non-elastic domain" of the invention means that the third and fourth elastic bodies 33, 34 are substantially not present in the first and second non-elastic domains 62, 64; and although the third and the third 4 The elastomers 33, 34 are present, but the elastomer does not exhibit shrinkage.

The third elastic body 33 has an outer end edge 33b positioned on both side edges 18c, 18d of the front waist region 14, and an inner end edge 33a disposed to overlap the absorbent body 11, and between the inner and outer end edges 33a, 33b The extended state is fixed. The fourth elastic body 34 has: an outer end edge 34b positioned at both side edges 19c, 19d of the rear waist region 15; and an inner end edge 34a at a position overlapping the leg elastic body 50, and is elongated between the inner and outer end edges be fixed. By disposing the third and fourth elastic bodies 33 and 34 in this manner, the inner end portion 36 of the front waist region 14 is attached to the absorbent body 11 by the contraction force of the third elastic body 33. Since the body of the person is not affected by the movement of the wearer's thigh, a gap such as a leakage of bodily fluid is formed between the body and the absorbent body 11. On the other hand, in the inner end portion 39 of the rear waist region 15, the fourth elastic body 34 does not cross the absorbent body 11, and there is no such a crack that the contraction force acts on the leakage of the body fluid into the absorbent body 11, Wrinkle worries.

Referring to Fig. 7, the size of the longitudinal direction Y of the underarm region 16, that is, the separation dimension L2 of the inner end edge 18a of the front waist region 14 and the longitudinal direction Y of the inner end edge 19a of the rear waist region 15 is 200 to 280 mm, and is relatively Here, the effective elongation dimension L4 at the maximum elongation of the leg elasticized sheet 43 is about 210 to 420 mm. Here, the effective elongation dimension L4 means that the inner end edge 18a of the front waist region 14 can be aligned with the front and rear end portions 46, 47 which are fixed to the front and rear waist regions 14, 15 without substantially extending. The longitudinal dimension of the portion in which the longitudinal direction Y of the leg elasticized sheet 43 between the inner end edges 19a of the back waist region 15 elastically expands and contracts. Therefore, the effective elongation dimension L4 of the leg elasticized sheet 43 is at least 1.05 times or more, preferably 1.05 to 1.5 times, and more preferably elastically elongated to 1.1 to 1.4 times, which is the dimension L2 of the longitudinal direction Y of the underarm region 16. Generally, in a diaper in which the front and rear waist regions and the underarm region are formed of different bodies, when the leg elastic body is installed in an extended state in a stretchable state, when the wearer wears, the wearer's body cannot exert sufficient elongation stress. There is a concern that the leg elastic body is pulled inwardly by the wearer's thigh, and the leg elastic body is caught in the wearer's groove. In the case of the diaper 10 of the present embodiment, the leg elasticized sheet 43 is attached in a state of being contracted, and the leg elasticized sheet 43 is sufficiently stretched along the thigh of the wearer to exhibit a desired elongation when worn. Stress, so it fits snugly on the thigh unit. Further, by the contraction action of the second elastic domain 63, the leg elastic body 50 is drawn outward in the lateral direction X, and the dimension of the lateral direction X of the rear end portion 47 of the absorbent body 11 does not change or is larger than before wearing. Without the worry that the hips are exposed to the outside.

As shown in an enlarged view in Fig. 7, in the rear waist region 15, the dimension R2 of the transverse direction X of the fourth elastic body 34 with the second intersection portion 67 of the leg elastic body 50 is the overall dimension R1 of the lateral direction X of the leg elastic body 50. About 10~30% is ideal. When the ratio is less than about 10% or the fourth elastic body 34 does not cross the leg elastic body 50, the fourth elastic body 34 and the leg elastic body 50 are not sufficiently formed to prevent the body fluid from being pressed around the thigh portion of the wearer. The imaginary elastic band of the leak, and there will be concerns about the leakage of body fluids. On the other hand, when the ratio is about 30% or more, the contraction force of the leg elastic body 50 is blocked by the contraction force of the fourth elastic body 34, and both side portions of the absorbent body 11 are contracted to make the back waist of the underarm region 16 The dimension W7 of the lateral direction X on the side of the field 15 becomes small, and there is a concern that the wearer's buttocks are exposed to the outside.

The first intersecting portion 66 where the third elastic body 33 of the front waist region 14 intersects the leg elastic body 50 is the same as the dimension R1 of the leg elastic body 50 in the lateral direction X, and the dimension R2 of the transverse direction X of the second intersecting portion 67 is ratio. The dimension R1 of the lateral direction X of the first intersection portion 66 is smaller.

Further, at least the second elastic region 63 of the first and second elastic domains 61 and 63 has an elongation stress at the maximum elongation of the second elastic region 63 which is larger than the maximum elongation at the maximum elongation of the elastic region of the leg elastic body 50. As described above, when the leg elastic body 50 slightly crosses the fourth elastic body 34, the elongation stress of the second elastic domain 63 is more than that of the elastic domain of the leg elastic body 50. When it is large, when the front and rear waist regions 14 and 15 are pulled up, the leg elastic body 50 is pulled toward the outer side of the lateral direction X by the elongation force of the fourth elastic body 34, so that the absorbent body 11 can cover the buttocks. Specifically, the elongation stress at the maximum elongation of the second elastic domain 63 is about 3.0 to 6.5 N/25 mm, and the elongation stress at the maximum elongation of the elastic region of the leg elastic body 50 is about 2.0 to 2.9 N/25 mm.

Referring to Fig. 8, the dimension L2 of the longitudinal direction Y of the crotch region 16 is smaller than the surrounding dimension of the thigh portion of the wearer, and since the leg elasticized sheet 43 is elongated along the thigh of the wearer, the leg elasticized sheet The outer edge 13c of the 43 is disposed along the groin of the wearer, and the leading edge E and the trailing edge F are positioned adjacent the wearer's lumbar. In such a case, the lowermost portion T1 of the crotch region 16 abuts on the lowermost portion of the wearer's armpit, and the exudate can be absorbed and held in the absorbent body. On the other hand, as indicated by the imaginary line, the dimension L2 of the longitudinal direction Y of the underarm region 16 is smaller than the size of the circumference of the wearer's thigh, and the leg elasticized sheet 43 is almost elongated to the maximum size. When the front and rear waist regions 14 and 15 are attached in an extended state, the leg elasticized sheet 43 does not elongate because the outer edge 13c of the leg elasticizing sheet 43 abuts against the groin portion of the wearer, so the front and rear edge E ', F' is located below the front and rear edges E and F. At this time, the lowermost portion T2 of the crotch region 16 is positioned lower than the lowermost portion T1, and the dimensional difference of the longitudinal directions Y is about 5 to 10 mm. Since the lowermost portion T2 is more than about 5 to 10 mm below the wearer's armpit, the absorbent body 11 is separated from the wearer's armpit, and there is a concern that side leakage of the excrement is generated. In order to avoid such a situation, when the leg elasticized sheet 43 in the extended state is further pulled up, the edge of the leg opening is sandwiched between the wearer's grooves, and the thong is displayed on the back side. The appearance of the diaper 10 can be impaired.

<Manufacturing Engineering of the Lower Slice 13>

Referring to Fig. 9(a), the manufacturing apparatus 70 of the underarm sheet 13 exemplarily shown includes, in order from the machine direction MD, a mounting process S1, a bending process S2, a first cutting process S3, and a shrink assembly process. S4 and the second cutting project S5. Fig. 9(b) shows the state of the continuous composite of each of the manufacturing processes S1 to S4 of Fig. 9(a).

<Continuous Elastomer Installation Engineering S1>

The continuous sheet 71 which is the base material of the cover sheet 51 is continuously discharged from the continuous discharge roller, and the coated portion 72 is coated with a hot-melt adhesive agent on both opposite sides of the intersection direction CD of the first surface 73. 74. The continuous sheet 71 is supplied to the rotary drum 75, and a pair of continuous elastic bodies 76 serving as a base material of the leg elastic body 50 are supplied to the first surface 73 of the continuous sheet 71 on the rotary drum 75. In the continuous elastic body 76, a hot-melt adhesive is intermittently applied to the coating portion 77 in the machine direction MD over the entire circumference thereof, and is fixed to the first surface 73 of the continuous sheet 71 via the hot-melt adhesive. Then, the continuous film 71 and the continuous film 78 which is the base material of the reinforcing sheet 52 are supplied between the pair of pressure rollers 79, and the continuous film 78 is placed on the first surface 73 side of the continuous sheet 71 by pressing. Continuous elastomer 76. The hot-melt adhesive is applied to the surface facing the first surface 73 of the continuous sheet 71 of the continuous film 78, and the continuous film 78 is fixed to the continuous sheet 71 via the adhesive, whereby the continuous composite 80 is formed.

<Bending Engineering S2>

The guide plates 81 are bent inwardly on the side portions 82, 83 facing each other in the intersecting direction CD of the continuous composite body 80, and in a state in which the continuous elastic body 76 is interposed, via the hot melt adhesive 74. The inner faces are fixed to each other.

<1st cutting project S3>

The continuous composite body 80 is supplied between the cutters 84 and the anvil rolls 85 which are disposed to face each other, and the center portion 86 of the cross direction CD is cut, and the continuous composite body 80 is divided into two to form a divided portion 87.

<Shrink Assembly Engineering S4>

The continuous composite 80 is supplied between the pair of circumferential speed adjusting rolls 88 that are disposed opposite to each other. Next, the first sheet 73 of the continuous composite 80 and the surface on the opposite side thereof are supplied with continuous sheets 91 and 92 which are the base materials of the inner sheet 44 and the outer sheet 45 via the pair of supply rollers 90. A hot-melt adhesive 93 is applied to both side portions of the continuous sheets 91 and 92, and the divided portion 87 is fixed via the hot-melt adhesive 93. The peripheral speed V1 of the peripheral speed adjusting roller 88 is higher than the peripheral speed V2 of the supply roller 90, and the ratio (V1/V2×100) of the peripheral speed V1 to the peripheral speed V2 is about 105 to 150%, and is preferably about 110. ~140%. In other words, the peripheral speed adjusting roller 88 rotates at a peripheral speed V2 of 1.05 to 1.5 times with respect to the peripheral speed V2 of the supply roller 90, and preferably rotates at a peripheral speed of 1.1 to 1.4 times. Therefore, the separation portion 87 is at the peripheral speed The adjustment roller 88 and the supply roller 90 are contracted, and a larger number of continuous composite bodies 80 per unit time (seconds) than the other items S1 to S3 are supplied between the supply rollers 90, and are mounted in a state where the divided portion 87 is contracted. Continuous sheets 91, 92.

<2nd cutting project S5>

The continuous composite body 80 is supplied between the cutter 94 and the anvil roll 95 which are disposed opposite each other, and a plurality of underarm sheets 13 are formed by cutting the continuous composite body 80 along a tangential line extending in the crossing direction CD. When the portion of the leg elastic body 50 in which the leg elasticized sheet 43 is disposed is stretched as shown by an imaginary line, the contraction of the leg elastic body 13 is such that the length of the longitudinal Y length dimension L2 of the underarm region 16 is only Mounted on the elastic waist sheet 12.

Fig. 10 (a) shows another example of the apparatus 70 for manufacturing the underarm sheet 13, and includes, in order from the machine direction MD, an assembly project S1, a bending process S2, a cutting process S3, a crease forming process S4, and shrinkage. Assembly project S5 and second cutting project S6. Fig. 10(b) shows the state of the continuous composite of each of the manufacturing processes S1 to S6 of Fig. 10(a).

In the manufacturing process of the manufacturing apparatus 70, the manufacturing process of the manufacturing apparatus 70 shown in FIGS. 9(a) and 9(b) differs only in the pleat forming process S4, and the peripheral speeds of the rolls of the respective projects are the same. There is no continuous composite of only a part of the project being supplied in a large amount. Hereinafter, only the pleat formation configuration S4 which is different from the above-described manufacturing process will be described.

<绉pleat formation project S4>

Referring to Fig. 10 (a) and Fig. 11, the pleating forming process S4 includes a pair of gear rolls 101 having a plurality of (gear) 103 and 104 having a plurality of teeth extending in the intersecting direction CD and intermingling each other on the outer peripheral surface, 102. By supplying the divided portion 87 of the continuous composite body 80 to the portion 105 where the respective gear rolls 101 and 102 mesh with each other, the uneven portion 87 is formed with the uneven pleats 68 which are continuous in the machine direction MD. Each of the teeth 103 of the gear roll 101 has a trapezoidal shape and is the same size as each of the teeth 104 of the gear roll 102 and has the same size. Further, it is preferable that the tooth tips of the teeth 103 and 104 are not broken when the pressure is applied to the separation portion 87. In this way, since the plurality of pleats 68 are formed at the separation portion 87 in the pleat forming process S4, the length dimension of the mechanical direction MD of the divided portion 87 after the pleat forming process S4 is smaller than that of the extended state. Further, in addition to the above-described manufacturing method, the leg elasticized sheet 43 may be formed integrally with the base sheet 42. That is, the gear rolling is performed only on both side portions of the composite sheet which becomes the base material of the base sheet 42 which flows in the machine direction MD, and the elastic member is disposed in the portion which is rolled by the gear, and the leg elasticized sheet of the present invention is disposed. Similarly to the case of 43, the elastic stretchability can be imparted to both side portions of the base sheet 42.

Each of the constituent members of the disposable diaper 10 is not limited to the materials described in the present specification, and various well-known materials which are generally used in the field can be used without limitation. In addition, the terms "1st", "2nd", "3rd" and "4th" used in this specification and the scope of the patent application are only for the district. Do not use the same elements or locations.

At least the following matters can be summarized in the disclosure of the present invention described above.

A disposable wearing article having a longitudinal direction and a transverse direction orthogonal thereto, and comprising: a skin facing surface and a non-skin facing surface; a front waist region; a back waist region; located between the front and rear waist regions The underarm region; the annular elastic waist sheet forming the front and rear waist regions; the underarm sheet forming the underarm region; and the disposable wearing article attached to the absorbent body of the elastic waist sheet The front and rear waist regions respectively have inner and outer end edges that are opposite to each other in the longitudinal direction, and the underarm sheet body includes a pair of legs extending longitudinally and having elastically stretchable leg elastic bodies. The elasticized sheet, the effective elongation dimension at the maximum elongation of the aforementioned leg elasticized sheet is larger than the aforementioned longitudinal separation dimension from the inner end edge of the front waist region to the inner end edge of the front waist region.

The invention disclosed in the above paragraph 0046 may include at least the following embodiments.

(1) The effective elongation dimension at the time of maximum elongation of the leg elasticized sheet is about 1.05 to 1.5 times the longitudinal separation from the inner end edge of the front waist region to the inner end edge of the rear waist region.

(2) The leg elasticized sheet includes: the leg elastic body and the cover sheet to which the leg elastic body is attached are attached to the inner and outer end edges of the front and rear waist regions in an elastically contracted state, and are formed in the longitudinal direction Continuous wrinkles.

(3) The aforementioned leg elasticized sheet comprises: the aforementioned leg elastic body, and before being installed The cover sheet of the leg elastic body is attached to the inner end edge of the front and rear waist regions in a state in which mechanical wrinkles are continuously formed in the longitudinal direction.

(4) the front waist region extends in the lateral direction along the inner end edge, and has: a first elastic domain that is opposed to each other in the lateral direction; and a first non-elastic domain located between the first elastic domains The back waist region extends in the lateral direction along the inner end edge, and has a second elastic region that is opposed to each other in the lateral direction, and a second non-elastic region between the second elastic regions, The leg elastic body intersects the first and second elastic domains, and the lateral dimension of the second non-elastic domain is larger than the lateral dimension of the first non-elastic domain, and the first elastic domain and the leg elastic The lateral dimension of the first intersection portion where the body intersects is larger than the lateral dimension of the second intersection portion where the second elastic domain intersects the leg elastic body.

(5) The lateral dimension of the second intersection portion located in the back waist region is about 10 to 30% of the lateral dimension of the leg elastic body.

(6) the absorbent body is located at a central portion of the lateral direction of the crotch sheet, and the first elastic region extends from a side edge of the front waist region to the absorber, and the second elastic region is from the rear waist region. The side edges extend to the aforementioned leg elastics.

(7) The elongation stress at the maximum elongation of at least the second elastic region among the first and second elastic domains is higher than the elongation stress at the maximum elongation of the elastic region of the leg elastic body.

(8) The longitudinal dimension of the aforementioned leg elasticized sheet is earlier than the aforementioned absorbent body The vertical size is smaller.

(9) The longitudinal dimension of the front waist region is substantially the same as the longitudinal dimension of the rear waist region, and the inner edge of the front and rear waist regions extending straight in the lateral direction is substantially orthogonal to the leg elastic body.

10‧‧‧Disposable wearing items

15‧‧‧Back waist area

16‧‧‧胯下域

14‧‧‧ Front waist

32‧‧‧2nd elastomer

27‧‧‧ outer thin

19b‧‧‧ inner edge

39‧‧‧Inside

27a‧‧‧Bend

19‧‧‧ Back waist

38‧‧‧Outside

40‧‧‧Intermediate

39‧‧‧Inside

19c‧‧‧ both sides

47‧‧‧ Back end

55‧‧‧ Back end

20‧‧‧ joints

19d‧‧‧ both sides

25‧‧‧ Inner layer

19a‧‧‧ inner edge

34‧‧‧4th Elastomer

30‧‧‧Fixed sheets

50‧‧‧ leg elastomer

52‧‧‧Reinforced flakes

51‧‧‧ Cover Sheet

48‧‧‧Intermediate

13c‧‧‧ outer edge

43‧‧‧ leg elasticized sheet

16‧‧‧胯下域

52‧‧‧Reinforced flakes

58‧‧‧Absorbent core

13‧‧‧Flexible underarm flakes

56‧‧‧Intermediate

18a‧‧‧ inner edge

12‧‧‧Flexible waist flakes

54‧‧‧ front end

24‧‧‧ Inner layer

31‧‧‧2nd elastomer

26‧‧‧ outer thin

18b‧‧‧ outer edge

28‧‧‧Graphic display sheet

18‧‧‧ Front waist

Claims (10)

A disposable wearing article having a longitudinal direction and a transverse direction orthogonal thereto, and comprising: a skin facing surface and a non-skin facing surface; a front waist region; a back waist region; located between the front and rear waist regions The underarm region; the annular elastic waist sheet forming the front and rear waist regions; the underarm sheet forming the underarm region; and the disposable wearing article attached to the absorbent body of the elastic waist sheet The front and rear waist regions respectively have inner and outer end edges that are opposite to each other in the longitudinal direction, and the underarm sheet body includes a pair of legs extending longitudinally and having elastically stretchable leg elastic bodies. The elasticized sheet, the effective elongation dimension at the maximum elongation of the aforementioned leg elasticized sheet is larger than the aforementioned longitudinal separation dimension from the inner end edge of the front waist region to the inner end edge of the front waist region. The disposable wearing article according to the first aspect of the invention, wherein the leg elasticizing sheet has an effective elongation dimension at a maximum elongation from the inner end edge of the front waist region to the rear waist region. The aforementioned longitudinal separation of the inner end edge is about 1.05 to 1.5 times. The disposable wearing article according to the first or second aspect of the invention, wherein the leg elasticized sheet comprises: the leg elastic body and the cover sheet to which the leg elastic body is attached, and elastically shrinks In the state of being attached to the inner end edge of the front and rear waist regions, wrinkles continuous in the longitudinal direction are formed. If it is used in the first or second paragraph of the patent application scope, it will be discarded. The article for wearing the leg, wherein the leg elastic sheet comprises the leg elastic body and the cover sheet to which the leg elastic body is attached, and is attached to the aforementioned state in a state in which mechanical wrinkles are continuously continuous in the longitudinal direction. The inner edge of the front and rear waist regions. The disposable wearing article according to the first or second aspect of the invention, wherein the front waist region extends in the lateral direction along the inner end edge, and has a direction opposite to each other in the lateral direction. a first elastic domain of the pair; and a first non-elastic domain located between the first elastic domains, wherein the rear waist region extends in the lateral direction along the inner end edge, and has: a second elastic domain; and a second non-elastic domain located between the second elastic domains, wherein the leg elastic body intersects with the first and second elastic domains, and the lateral dimension of the second non-elastic domain a dimension larger than the lateral direction of the first non-elastic region, and a dimension of the lateral direction of the first intersection portion where the first elastic region intersects with the leg elastic body is greater than a cross between the second elastic region and the leg elastic body The aforementioned lateral dimension of the 2 intersection portion is larger. The disposable wearing article according to claim 5, wherein the lateral dimension of the second intersection portion of the back waist region is about 10 of the lateral dimension of the leg elastic body. ~30% of the size. The disposable wearing article according to claim 5, wherein the absorbent body is located at a central portion of the lateral direction of the underarm sheet, and the first elastic region is from a side edge of the front waist region. The aforementioned suction The extension extends, and the second elastic domain extends from the side edge of the back waist region to the leg elastic body. The disposable wearing article according to the fifth aspect of the invention, wherein at least the second elastic region of the first and second elastic domains has an elongation stress at a maximum elongation of the leg elastic body The elongational stress at the maximum elongation of the elastic domain is higher. The disposable wearing article according to the first or second aspect of the invention, wherein the longitudinal dimension of the leg elasticized sheet is smaller than the longitudinal dimension of the absorbent body. The disposable wearing article according to the first or second aspect of the invention, wherein the longitudinal dimension of the front waist region is substantially the same as the longitudinal dimension of the rear waist region, and the lateral direction is The inner edge of the front and rear waist regions extending straight is substantially orthogonal to the leg elastics.