TW201713290A - Disposable wearable article - Google Patents

Abstract

Provided is a disposable wearable article capable of maintaining a state in which the buttocks are covered at a rear-waist-panel side of a crotch region. This nappy (10) includes: a front waist panel (14); a rear waist panel (15); an absorption panel (16) between the front and rear waist panels; and a pair of leakage-prevention cuffs (60) which extend in the vertical direction (Y) at a skin-facing surface side of the absorption panel (16). The leakage-prevention cuffs (60) are provided with: proximal sections (62); and distal sections (63) in which a plurality of strip-like cuff elastic bodies (64) are disposed. Side extension sections (61) which are provided with a plurality of strip-like leg elastic bodies (65), and which extend in the vertical direction (Y) are positioned outside the proximal sections (62) in the horizontal direction (X). The number of sheets forming the side extension sections (61) is greater than the number of sheets forming the leakage-prevention cuffs (60). The elongation scale factor of the leg elastic bodies (65) is smaller than that of the cuff elastic bodies (64). The spacing dimension (W7) between the leg elastic bodies (65) in the horizontal direction (X) is greater than the spacing dimension (W6) between the cuff elastic bodies (64) in the horizontal direction (X).

Description

Disposable wearing items

The present invention relates to a disposable wearing article.

Patent Document 1 discloses a disposable wearing article comprising: a front waistline sheet forming a front waistline region; a back waistline sheet forming a rear waistline region; and being formed between the front and rear waistline sheets An absorbent sheet body in the crotch region; a liquid-absorbent core material; and a pair of leakage-preventing sides extending in the longitudinal direction on the opposite skin side of the absorbent sheet.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2006-525858 (P2006-525858)

In the wearing article disclosed in Patent Document 1, the front waistline sheet and the back waistline sheet have the same shape and the same size, in the pants sheet. Between the barrier side elastic material on the side of the block and the foot elastic material on the side of the elastic leg, the relationship of the stretch ratio and the separation size are not limited. Therefore, the buttocks on the side of the waist sheet after the crotch region are not covered. When it is sufficient, there will be a situation in which it is impossible to maintain the state of covering the buttocks.

The present invention is an improvement of the prior art, and an object of the present invention is to maintain a disposable wearing article in a state in which a buttocks sheet side of a crotch region is covered with a buttocks.

In order to achieve the above object, the present invention relates to a disposable wearing article having a longitudinal direction, a transverse direction and a thickness direction, and comprising: a skin facing surface and a non-skin facing surface; forming a front waist region a front waistline sheet; a back waistline sheet forming a rear waistline region; an absorbent sheet positioned between the front and rear waistline sheets and forming a crotch region; a liquid absorbing core material; and the skin facing side of the absorbent sheet body One of the pair of leakproof sides extending in the longitudinal direction.

The disposable wearing article of the present invention is characterized in that the leakage preventing side has a base end portion extending in the longitudinal direction and a plurality of side edge elastic bodies disposed to be expandable and contractible in the longitudinal direction. a side extending portion that has a leg elastic body and extends in the longitudinal direction is located on the outer side in the lateral direction of the base end portion of the leakage preventing side, and the number of sheets forming the side extending portion is higher The number of sheets forming the leakage preventing side is large, and a plurality of the side elastic bodies that can expand and contract in the longitudinal direction are disposed on the side extending portion, and the stretching ratio of the foot elastic body is The separation ratio in the lateral direction between the leg elastic bodies is larger than the separation dimension in the lateral direction of the side elastic body, which is smaller than the expansion ratio of the side elastic body.

The number of wrinkles per unit area formed in the aforementioned side extension projections is smaller than the number of wrinkles per unit area formed on the aforementioned leakage prevention side. According to the article for wearing, a space can be formed between the side extension extending portion and the leakage preventing side, and the air permeability of the wearing article can be improved.

The absorbent sheet system has a front end portion at a front and a rear waist sheet, and the front and rear waist sheets each have a plurality of front and rear waist elastic bodies extending in the lateral direction, and the aforementioned absorption in the front waist elastic body in a plane view angle The elongation stress of the elastic body in which the front end portions of the sheet body overlap each other is higher than the elongation stress of the elastic body which overlaps with the rear end portion of the absorbent sheet body in the back waist elastic body in a plan view angle. According to the wearing article, since the dimension of the rear waistline sheet in the lateral direction is larger than the dimension of the front waistline sheet in the lateral direction, the buttocks can be reliably covered.

The side extension projecting portion has a liquid diffusing layer and a hydrophobic layer covering the liquid diffusing layer in the thickness direction. According to the article for wearing, the hydrophobic layer can prevent excretion such as urine from leaking from both sides of the absorbent sheet in the lateral direction, and the excretion can be maintained by the liquid diffusing layer, thereby increasing excretion The absorption capacity of the object.

Further, the inner surface sheet having the liquid permeability of the skin facing surface side of the liquid absorbing core material is provided, and the liquid diffusing layer has the aforementioned The both side edges of the liquid-absorbent core material further extend toward the outer side of the inner side sheet extending outward in the lateral direction. According to the wearing article, since the excrement can be held by the extending portion of the inner sheet, the absorbent capacity of the excrement can be further increased.

Further, the core material wrap sheet is coated with the liquid absorbing core material, and the liquid diffusing layer has the core material wrap sheet extending from the both side edges of the liquid absorbing core material further outward in the lateral direction. The extension extends. According to the wearing article, since the excrement can be held by the extending portion of the core wrapping sheet, the absorbent capacity of the excrement can be further increased.

The extending portion of the inner sheet is bent toward the non-skin opposing surface side of the liquid-absorbent core member along a bending line extending in the longitudinal direction. According to the wearing article, since the excrement is held even in the portion where the inner sheet is bent, the absorbent capacity of the excrement can be further increased.

According to the disposable wearing article according to the present invention, since the number of sheets forming the side extending projection portion is larger than the number of sheets forming the leakage preventing side, the side extending portion is extended. The rigidity is higher than that of the leak-proof side. Further, the expansion ratio of the leg elastic body is smaller than the expansion ratio of the side elastic body, and the separation dimension in the lateral direction between the leg elastic bodies is larger than the separation dimension in the lateral direction of the side elastic body. , can inhibit the side extension protruding portion from entering the lateral direction inner side, capable of maintaining Hold the state of the buttocks by extending the side extensions.

10‧‧‧paper diapers (wearing items)

11‧‧‧ Front Waist Area

12‧‧‧After Waist Area

13‧‧‧Pants area

14‧‧‧Front Waist Sheet

15‧‧‧After waist sheet

16‧‧‧Absorbing flakes

19A‧‧‧ front end

19B‧‧‧ back end

20B‧‧‧Front lower waist elastic (front waist elastic)

23B‧‧‧After lower waist elastic (back waist elastic)

31‧‧‧Inside flakes

31A‧‧‧Extension of the inner sheet

35‧‧‧Aspirating core material

36‧‧‧ core material wrapped sheet

36A‧‧‧Extension of the core wrapping sheet

43‧‧‧1st bend line

44‧‧‧2nd bend line

50‧‧‧Hydrophilic layer (liquid diffusing layer)

51‧‧‧1st hydrophobic layer (hydrophobic layer)

52‧‧‧2nd hydrophobic layer (hydrophobic layer)

60‧‧‧ leak-proof side

61‧‧‧ Side extension

62‧‧‧ base end

63‧‧‧Free Department

64‧‧‧Side edge elastomer

65‧‧‧foot elastomer

W6‧‧‧Separate dimensions of the lateral elastomers in the transverse direction

Separation dimensions of the transverse direction of the W7‧‧‧ foot elastomer

X‧‧‧ horizontal direction

Y‧‧‧ longitudinal direction

Z‧‧‧ Thickness direction

The drawings show specific embodiments of the invention disclosed herein, including not only indispensable structures, but also alternative and desirable embodiments.

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

Fig. 2 is a partially cutaway plan view showing the diaper viewed from the opposite side of the skin.

Fig. 3(a) is a view showing a bent state of a coated sheet. Fig. 3 (b) is a view showing a state in which the liquid-absorbent structure is placed on the opposite side of the skin of the coated sheet. Fig. 3(c) is a view showing an arrangement of the joint regions on both side portions of the coated sheet.

Figure 4 is a cross-sectional view taken along line IV-IV of Figure 2 .

Fig. 5 is a partially enlarged view of a region surrounded by a line V of Fig. 4.

Figure 6 is an enlarged view of the edge of the foot opening in the wearing state

Fig. 7 is a view similar to Fig. 5 in the first modification.

Fig. 8 is a view similar to Fig. 5 in a second modification.

The following embodiment is a disposable disposable diaper 10 as shown in Figs. 1 to 8 as an example of the present invention, and includes a structure which is indispensable for the invention, and includes optionality and rationality. Think about the structure. In FIGS. 2 and 3, each of the elastic systems described later is in a state of overcoming its contraction force, and is elongated to a contraction force in the lateral direction X and the longitudinal direction Y so that the wrinkles of the members to which the respective elastic bodies are attached are based on natural vision. The state of the extent that it substantially disappears.

As shown in FIG. 1 to FIG. 3, the disposable disposable diaper 10 of the disposable wearing article of the present invention has a longitudinal direction Y and a transverse direction X, a thickness direction Z, and a skin pair intersecting therewith. The non-skin opposing surface on the facing surface and the opposite side, the longitudinal center line P that bisects the length dimension of the lateral direction X, and the lateral center line Q that bisects the length dimension of the longitudinal direction Y are substantially perpendicular to the longitudinal center line P It is symmetrical and includes a front waistline region 11, a rear waistline region 12, and a crotch region 13 between the front waistline region 11 and the back waistline region 12.

The disposable diaper 10 is a front waistline sheet 14 forming a front waistline region 11; a back waistline sheet 15 forming a rear waistline region 12; and a crotch region 13 extending between the front and rear waistline sheets 14 and 15 in the longitudinal direction Y. The sheet 16 is absorbed. The front waistline sheet 14 and the back waistline sheet 15 are formed to have, for example, the same shape and the same size. The absorbent sheet 16 has a skin facing surface side front end portion 19A of the front waistline region 11 , a skin facing surface rear end portion 19B of the back waistline region 12 , and an intermediate portion between the front and rear end portions 19A, 19B. Part 19C. In the present embodiment, the front and rear end portions 19A and 19B of the absorbent sheet 16 are fixed to the skin facing surface side of the front and rear waist regions 11 and 12, respectively, but the absorbent sheet 16 can be fixed to the front and rear waist sheets 14 and 15 respectively. On the outside, the front and rear end portions 19A, 19B are located on the non-skin opposing faces of the front and rear waist regions 11, 12.

Both side edges of the front waistline region 11 and both side edges of the rear waistline region 12 are mutually joined by a plurality of seams 25 spaced apart in the longitudinal direction Y, thereby forming a waist opening 26 and a pair of foot openings 27 . The seam 25 can be formed by various conventional bonding means such as a hot-melt adhesive or the like, various conventional joining means by means of heat sealing, ultrasonic welding or the like, or a combination of these means.

The front waistline sheet 14 has a horizontally long rectangular shape, and forms an inner end edge (the inner end edge of the front waistline region) 14a of the front foot opening, and forms an outer edge of the front waist opening (the outer edge of the front waistline region). 14b and both side edges 14c, 14d (both sides of the front waistline region) extending between the inner and outer end edges 14a, 14b in the longitudinal direction Y are defined. Further, the front waistline sheet 14 further has a liquid-impermeable inner layer sheet 17 located on the opposite side of the skin; a liquid-impermeable outer sheet 18 on the non-skin facing side; and an inner layer A plurality of string-shaped or strand-shaped front waist elastic bodies 20 that are retractably disposed between the sheets 17 and 18 in a state in which they are elongated in the lateral direction X.

The back waistline sheet 15 has an inner end edge (the inner end edge of the rear waist region) 15a forming a part of the rear foot opening, and an outer edge (the outer edge of the rear waist region) 15b forming the rear waist opening; Two side edges (both sides of the rear waist region) 15c, 15d extending between the outer end edges 15a, 15b in the longitudinal direction Y. The back waist sheet 15 further has a liquid-impermeable inner sheet 21 on the opposite side of the skin, a liquid-impermeable outer sheet 22 on the non-skin facing side, and an inner layer 21 Between 22 and 22, it is retractably configured in an extended state in the lateral direction X. A plurality of chord-like or strand-like rear waist elastics 23.

The front waist elastic body 20 has a plurality of front upper waist elastic bodies 20A extending in the lateral direction X along the outer end edge 14b, and a front lower front waistline between the front upper front waist elastic body 20A and the inner end edge 14a. Elastomer 20B. The rear waist elastic body 23 has a plurality of rear upper waist elastic bodies 23A extending in the lateral direction X along the outer end edge 15b, and a rear lower front waistline between the rear upper front waist elastic body 23A and the inner end edge 15a. Elastomer 23B. The front lower waist elastic body 20B is at a position overlapping the front end portion 19A of the absorbent sheet 16 in the plane view of the disposable diaper 10, and the rear lower waist elastic body 23B is in the plane view angle of the disposable diaper 10 and the absorbent sheet. A position at which the rear end portions 19B of the body 16 overlap each other.

The inner and outer sheets 17 , 18 , 21 , 22 of the front and rear waist sheets 14 and 15 can be made liquid-impermeable and desirably of a mass of 10 to 40 g/m ² and a fiber density of 0.03 to 0.1 g/cm ³ . Various conventional fiber nonwoven fabrics such as spunbonded nonwoven fabric, SMS (spunbond-meltblown-spunbond) fiber nonwoven fabric, and hot air fiber nonwoven fabric.

In the front and rear waist elastic bodies 20 and 23, as the front and rear upper waist elastic bodies 20A and 23A, for example, a string shape or a strand that can be retracted in a state of 600 to 1200 dtex and 2.5 to 3.5 times in elongation can be used. Elastic material. In addition, as the front and rear waist elastic bodies 20B and 23B, for example, a string-like or strand-shaped elastic material which is retractably placed in a state of 400 to 800 dtex and stretched by 1.5 to 3.0 times can be used. The fineness and elongation of the front and rear waist elastics 20, 23 Various conditions such as the magnification and the separation size (pitch) between the respective elastic bodies can be appropriately changed as needed, but can be stably worn on the waist opening 26 side for the wearer's body, with the front and rear waist circumferences The elongation stress of the elastic region of the elastic bodies 20A and 23A is a condition for setting the respective elastic bodies so that the elongation stress of the expansion and contraction regions of the front and rear waist elastic bodies 20B and 23B is high. Moreover, when the required elastic force can be applied to the front and rear waist regions 11 and 12, the front and rear waist elastic bodies 20 and 23 can be replaced, and the elastic stretch sheets can be disposed on the inner surface side of the front and rear waist regions 11 and 12 at the same time. Or the outside side. By arranging the front and rear waist elastic bodies 20 and 23 on the entire outer surface of the disposable diaper 10, a plurality of wrinkles can be formed on the outer surface of the disposable diaper 10, and the entire wrinkles can be formed.

As shown in Fig. 2, the dimension W1 of the disposable diaper 10 in the lateral direction X is 550 to 740 mm, and the dimension L1 of the longitudinal direction Y of the side edges of the front and rear waistline regions 11 and 12 is 160 to 210 mm. Further, the dimension W2 of the absorbent sheet 16 in the lateral direction X is 150 to 220 mm. Therefore, the dimension W2 of the absorbent sheet 16 in the lateral direction X is 27 to 36% of the dimension W1 of the transverse direction X of the disposable diaper 10, and the absorbent sheet 16 can be compared with a general disposable diaper (especially for adults). It is called narrow width.

The absorbent sheet 16 is a vertical rectangle defined by the front and rear end edges 16a, 16b and the side edges 16c, 16d, and the front and rear end portions 19A, 19B are coated with heat on the skin facing faces of the front and rear waist sheets 14, 15 The front and rear joint regions (not shown) formed by the melt adhesive are joined to each other. The coating pattern of the hot melt adhesive in the front and rear joining regions may be, for example, in addition to a plurality of lines extending in the longitudinal direction Y, or in an Ω shape or a spiral shape. Various conventional shapes such as waves.

As shown in FIG. 2 and FIG. 3, the absorbent sheet 16 has a liquid-absorbent structure composed of a hydrophilic/liquid-permeable inner sheet (body side liner) 31 and an absorbent body 33 located on the opposite side of the skin. The body 30; the hydrophobic cover sheet 32 located on the non-skin facing surface side of the liquid-absorbent structure 30; and the hydrophobicity of the size of at least the bottom surface of the liquid-absorbent structure 30 on the non-skin opposing surface side Or a liquid-tight leak-proof film 34. The absorber 33 has a liquid-absorbent core member 35 and a core-wrap sheet 36 covering the entire liquid-absorbent core member 35.

The liquid-absorbent core member 35 has a semi-rigid sheet shape imparting a desired shape, and has a front and rear end edges extending in the lateral direction X and a longitudinal center line P between the front and rear end edges (inward in the lateral direction X) ) protruding and extending the side edges 35c, 35d. Further, the liquid absorbing core member 35 is formed of a mixture of fluff wood pulp and superabsorbent polymer particles (SAP). When a wearing diaper for use as an adult and a slight urinary incontinence is used, the thickness of the liquid absorbing core member 35 is preferably small, for example, the quality of the SAP can be relatively reversed by the quality of the fluffy wood pulp. It is made smaller to maintain the required amount of water absorption and to reduce the thickness thereof, and it is also possible to form the liquid-absorbent core member 35 only from SAP.

The inner sheet 31 and the core wrapping sheet 36 are formed of a sheet material having hydrophilicity and liquid diffusibility, for example, a spunbonded fiber nonwoven fabric or a SMS fiber non-woven fabric which can be hydrophilized by a mass of 15 to 25 g/m ² . Waiting for it to form. The core wrap sheet 36 may be formed of the same type of sheet material as the inner sheet 31, but is preferably formed of tissue paper. Further, the thickness is smaller than the thickness of the inner sheet 31, and the thickness of the liquid absorbing core member 35 can be maintained to a desired shape. The coated sheet 32 is formed of a hydrophobic or substantially liquid-impermeable sheet material, for example, an SMS fiber nonwoven fabric having a mass of 15 to 30 g/m ² , a spunbonded nonwoven fabric, or the like. The leakage preventing film 34 is formed of a breathable plastic sheet material having a gas permeable property of, for example, a mass of 10 to 25 g/m ² .

As shown in FIG. 4 and FIG. 5, in the liquid-absorbent structure 30, the inner sheet 31 covered with the skin facing surface side of the liquid-absorbent core member 35 is attached to the both side edges 35c and 35d of the liquid-absorbent core member 35. Further extending outward in the lateral direction X. Specifically, the inner sheet 31 extends from both side edges 35c and 35d of the liquid-absorbent core member 35 to the vicinity of both side edges 16c and 16d of the absorbent sheet 16, and is bent along the bending line 31c to face the longitudinal direction. The center line P is extended such that the outer edge portion 31b thereof is located on the non-skin opposing surface side of the liquid-absorbent core member 35, and the above-mentioned bending line 31c extends in the longitudinal direction Y along both side edges 16c, 16d of the absorbent sheet body 16. . Further, the core-wrap sheet 36 covering the liquid-absorbent core member 35 has a shape larger than that of the liquid-absorbent core member 35. The inner sheet 31 and the core wrapping sheet 36 respectively have extending portions 31A, 36A extending outward from the side edges 35c, 35d of the liquid-absorbent core 35 toward the lateral direction X, by which the extending portions are extended 31A and 36A, a hydrophilic layer (liquid diffusing layer) 50 is formed on the outer side in the lateral direction X of the liquid-absorbent core member 35.

Since the hydrophilic layer 50 is formed by the folded extension portions 31A, 36A of the inner sheet 31 and the core wrapping sheet 36, Therefore, it has a 4-layer structure. However, as long as it has the desired liquid holding property, the extended protruding portion 31A of the inner sheet 31 and the extended protruding portion 36A of the core wrapping sheet 36 have a two-layer structure instead of a four-layer structure, a hydrophilic layer. 50 may also be formed only by the extended projecting portion 31A of the inner face sheet 31. Further, since the both side edges 35c and 35d of the liquid-absorbent core member 35 have a concave curved shape, the hydrophilic layer 50 has the largest dimension W5 in the lateral direction X in the central portion of the crotch region 13, and the front and rear waist regions 11 In 12, the dimension W5 of the lateral direction X is the smallest.

Fig. 3(a) is a view showing a bent state of the coated sheet 32, Fig. 3(b) is a view showing a state in which the liquid-absorbent structure 30 is placed on the coated sheet 32, and Fig. 3(c) is a view showing the covered sheet 32. A view of the arrangement of the joint regions 46 to 48 of the both side portions 42. 3(a) to 3(c) are views for explaining an assembly process of the absorbent sheet 16, and may be employed as long as both side edges of the absorbent sheet 16 have a laminated structure as shown in FIG. Other assembly processes. In addition, in FIG. 4, for the convenience of description, the side surface 16c side of the absorbent sheet 16 is shown, the both side parts 42 of the covering sheet 32 fall down, and the other side edge 16d side of the absorption sheet 16 is shown. The both side portions 42 of the cover sheet 32 stand up (wearing state).

As shown in FIG. 3(a), the cover sheet 32 has a first bending line 43 which is located at the outermost side and extends in the longitudinal direction Y in the lateral direction X, and a first line located inside the first bending line 43. 2 bend line 44. The covered sheet 32 is bent toward the longitudinal center line P side along the first bending line 43. Further, the coated sheet 32 has a main body portion in which the leakage preventing film 34 is disposed 41; and a second bending line 44 extending in the longitudinal direction Y along both side edges of the leakage preventing film 34 is closer to the outer side portions 42 on the outer side in the lateral direction X. The both side portions 42 are bent toward the longitudinal center line P side along the second bending line 44 and are superposed on the main body portion 41.

As shown in Fig. 3 (b), the cover sheet 32 in a state in which only the first bending line 43 of Fig. 3 (a) is bent is disposed on the skin facing surface side. In the state in which the liquid-absorbent structure 30 is placed on the covering sheet 32, the both side portions 42 of the covering sheet 32 are further bent toward the longitudinal center line P side along the second bending line 44, and the second bending line 44 is The longitudinal edges Y extend along both side edges of the liquid-absorbent structure 30.

As shown in Fig. 3 (c) and Figs. 4 and 5, in the state in which the second bending line 44 is bent, the portion of the both side portions 42 which is bent toward the facing side of the skin of the hydrophilic layer 50 is shown. The outer joint region 46 extending in the longitudinal direction Y along the side edges 16c and 16d of the absorbent sheet 16 , the inner joint region 47 located on the inner side in the lateral direction X of the outer joint region 46 , and the front and rear waist regions 11 and 12 are located. The more inner end joint region 48 of the inner joint region 47 in the lateral direction X is fixed. Moreover, the outer edge portion of the hydrophilic layer 50 on the non-skin opposing surface side is bonded to the non-skin opposing surface side of the hydrophilic layer 50 via the bonding region 49 facing the outer side joining region 46 in the thickness direction. Further, although not shown, as long as it is not particularly described in the present specification, the sheets laminated in the thickness direction Z are applied to at least one of the mutually opposing faces of the sheets. The agent is fixed.

As shown in Fig. 3 (b) and Figs. 4 and 5, on both sides 42 A plurality of side elastic bodies 64 are disposed between the covering sheets 32 in a folded state, and the side elastic bodies 64 are contractible in an extended state and extend in the longitudinal direction Y along the second bending line 44. It is in the shape of a string or a strand. Further, on the outer edge portion side of the coated sheet 32, a plurality of leg elastic bodies (shims side elastic bodies) 65 are attached between the both side portions 42 and the leakage preventing film 34, and the leg elastic bodies 65 are elongated. The state is contractible and extends in the longitudinal direction Y and is in the shape of a string or a strand.

For the side elastic body 64, for example, an elastic material having a thickness (wire diameter) of 470 to 740 dtex and extending 2.5 to 3.2 times from a contracted or relaxed state can be used. As shown in Fig. 4, the separation dimension W6 of the lateral elastic body 64 in the lateral direction X is 3 to 8 mm.

For the leg elastic body 65, for example, an elastic material having a thickness (wire diameter) of 470 to 740 dtex and a length of 1.7 to 2.3 times from a contracted or relaxed state can be used and fixed. The separation dimension W7 of the leg elastic body 65 in the lateral direction X is 10 to 15 mm.

The expansion ratio of the leg elastic body 65 is smaller than the expansion ratio of the side elastic body 64. Further, the separation dimension W7 of the leg elastic body 65 in the lateral direction X is larger than the separation dimension W6 of the lateral elastic body 64 in the lateral direction X.

As shown in FIGS. 4 and 5, the absorbent sheet 16 has such a structure that it further has a pair of leakage preventing sides 60 extending in the longitudinal direction Y and a lateral direction X at the leakage preventing side 60. One of the outer sides extends from the opposite side (pad side) 61. The leakage preventing side 60 has a two-layer structure composed of two covering sheets 32 bent at the first bending line 43. In other words, the leakage preventing side 60 is composed of two sheets of coated sheets 32. Leakproof The side 60 has a fixed end portion fixed to the inner sheet 31 via the end joint region 48 of the both side portions 42 of the covering sheet 32, and is fixed to the inner sheet 31 via the inner joint region 47 and is oriented in the longitudinal direction Y. A base end portion (proximal end portion) 62 that extends, and a free portion (distal end portion) 63 that extends in the longitudinal direction Y between the both end fixing portions and that extends in the longitudinal direction Y in parallel with the base end portion 62. In the free portion 63, since the side elastic body 64 is retractably disposed in an extended state, in the wearing state, the side elastic body 64 is contracted so that the edge portion faces the wearer from the inner sheet 31 The body side is separated and fits the wearer's thigh to prevent body fluid leakage.

In the present embodiment, a part of the leakage preventing side 60 and the side extending projection 61 are formed from the covering sheet 32. However, the leakage preventing side 60 may be formed of a sheet material different from the covering sheet 32. At this time, since the leakage preventing side 60 is mainly for preventing leakage of body fluid, it is not necessarily required to be formed of a liquid-impermeable sheet.

As shown in FIGS. 4 and 5, the side extending projection 61 of the absorbent sheet 16 has a projection portion 31A extending from the inner sheet 31 and an extended projection portion 36A of the core wrapping sheet 36. The hydrophilic layer 50; and the hydrophobic layers 51, 52 covering the hydrophilic layer 50 in the thickness direction Z. The hydrophobic layers 51 and 52 have a first hydrophobic layer (lower layer) 51 covering the non-skin opposing surface side of the hydrophilic layer 50, and a second hydrophobic surface facing the skin facing side of the hydrophilic layer 50. Sex layer (upper layer) 52. The first hydrophobic layer 51 has a three-layer structure including a main body portion 41 of the covering sheet 32, an outer edge portion 42A, and a leakage preventing film 34, and the second hydrophobic layer 52 has a structure in which the covering sheet 32 is bent. The two sides of the piece are constructed It is a two-layer structure. The hydrophilic layer 50 has a four-layer structure of two inner sheet sheets 31 that are bent and two sheets of core material wrapped sheets 36 that are bent. That is, the number of sheets constituting the side extension projecting portion 61 is nine. Between the side edge portion of the leakage preventing film 34 forming the first hydrophobic layer 51 and the outer edge portion 42A of the covering sheet 32, the plurality of leg elastic bodies 65 are retractably attached in an extended state. The side extension projecting portion 61 of the absorbent sheet 16 is elasticated at least in the longitudinal direction Y by the contraction of the leg elastic body 65 located in the first hydrophobic layer 51.

According to the disposable diaper 10, since the number of sheets forming the side extending projection 61 is larger than the number of sheets forming the leakage preventing side 60, the rigidity of the side extending projection 61 is smaller than the leakage preventing side. The rigidity of 60 is high. Further, the expansion ratio of the leg elastic body 65 is smaller than the expansion ratio of the side elastic body 64, and the separation dimension in the lateral direction X between the leg elastic bodies 65 is larger than the separation dimension in the lateral direction X between the side elastic bodies 64. . When the side extension portion is a single layer or a layered structure of 2 or 3 layers, on the side of the back waist region of the crotch region, there is a possibility that the extension portion at the middle side of the cuff is curled to cause the buttocks to be exposed, but The rigidity of the side extension projecting portion 61 is high, so that the side extension projecting portion 61 can stably abut against the body, and the side extension projecting portion 61 can be prevented from entering the inner side in the lateral direction X, and the sheet 16 can be maintained by the absorption. The back waist area 12 side covers the state of the buttocks. Further, since the expansion ratio of the leg elastic body 65 is smaller than the expansion ratio of the side elastic body 64, the side extension projecting portion 61 does not stand up toward the body together with the leakage prevention side 60, but can be formed to face the horizontal direction. Since the outer side of the X protrudes, it can contact the inner side of the thigh in a planar shape. Also, in the longitudinal direction, by the rear waist region The size is made larger than the size of the front waistline region, so that in the diaper having the buttocks covering portion at the lower end portion of the back waistline sheet, when the wearing state, the flap-like hip covering portion bites into the wearer's The state of the body is formed. When wearing a fitted garment, etc., the line of the body and the diaper caused by the bite can be recognized from the clothes, especially for women, there will be a pair of wearing diapers. The cause of the resistance of 10 is generated. In the disposable diaper 10 of the present embodiment, the side extension portion 61 has a high rigidity, so that the side of the rear waist region 12 covering the crotch region 13 of the buttocks is not easily bitten into the body when worn, even if worn. With the fitted clothes, the stepped lines caused by the disposable diaper 10 and the body are not recognized from the clothes, and the wearer who wears the disposable diaper 10 can reduce the resistance to wearing.

Further, since the separation dimension (pitch) in the lateral direction X between the leg elastic bodies 65 is larger than the separation dimension (pitch) in the lateral direction between the side elastic bodies 64, the wrinkles formed on the side extension projections 61 are formed. The (transverse wrinkles) 61a is larger than the wrinkles (transverse wrinkles) 60a of the free portion 63 formed on the leakage preventing side 60. Since a large number of pleats 61a are formed in the side extension projecting portion 61, a plurality of gaps serving as air flow paths are formed between the thigh portion and the side extension projecting portion 61, so that it can be effectively prevented The inside of the disposable diaper 10 is stuffy. Further, since the side extension projecting portion 61 has a multi-layered structure and high rigidity, the wrinkle 61a has a stable shape and does not collapse and disappear during wearing. In addition, a plurality of smaller pleats 60a are formed on the leakage preventing side 60, and the number of pleats 60a per unit area of the leakage preventing side 60 is a wrinkle per unit area of the laterally extending protruding portion 61. The number of pleats 61a is large. Therefore, in each unit area, the area of the side extension protrusion 61 abutting the body is wider than the area of the leakage prevention side 60 abutting the body, even if the rigidity of the leakage prevention side 60 extends sideways. The outlet 61 is low and can be stably attached to the body. In the case where the dimension of each of the side extension projections 61 in the lateral direction X is 5 mm and the length dimension of the longitudinal direction Y is 50 mm, 3 to 7 or more wrinkles (transverse gathers) 61a are formed. Further, in the case where the dimension of each of the leakage preventing side 60 in the lateral direction X is 5 mm and the length dimension of the longitudinal direction Y is 50 mm, 8 to 15 or more wrinkles (transverse gathers) 60a are formed. Further, the body layer liquid such as urine is diffused and absorbed by the hydrophilic layer 50 on the side extension portion 61, and the body fluid is prevented from moving along the body toward the skin facing surface by the leakage preventing side 60. Even if a gap is formed by the wrinkles 61a, the body fluid does not leak to the outside of the disposable diaper 10.

As shown in Fig. 6, in the wearing state of the disposable diaper 10, the leakage preventing side 60 stands up toward the wearer's body 70 side by the contraction action of the side elastic body 64 and abuts against the groin portion, and further, the side extension The projecting portion 61 is fitted to the vicinity of the root portion of the thigh portion by the contraction force of the foot elastic body 65. Thus, the edge portion of the leg opening 27 of the disposable diaper 10 abuts the body over a wide range by the leakage preventing side 60 and the side extending projection 61, thereby preventing body fluids only by the leakage preventing side 60. Lateral leakage can prevent lateral leakage of body fluid more effectively.

From the standpoint of wearing a disposable diaper for everyday use, in order to make it impossible to recognize the appearance of the disposable diaper for the inside of the garment, in order to suppress the thickness of the disposable diaper 10 only, it is possible to The thickness dimension and/or width dimension of the liquid absorbing core material is preferably reduced. However, when the thickness dimension or the like of the liquid-absorbent core material is reduced, the amount of liquid absorption of the body fluid is reduced, and the generation of the body fluid cannot be sufficiently maintained. In the disposable diaper 10 of the present embodiment, the extending portion 31A and the core wrapping sheet 36 of the inner sheet 31 extending outward from the side edges 35c and 35d of the liquid-absorbent core member 35 in the lateral direction X are formed. The hydrophilic layer 50 formed by the extending portion 36A extends along the side edges 16c, 16d of the absorbent sheet 16 to the side extending portion 61. Therefore, in the hydrophilic layer 50, the liquid can be absorbed. The body fluid absorbed by the core material 35 is diffused or directly absorbed by the body fluid absorbed by the liquid-absorbent core material 35, and the body fluid exceeding the liquid-absorbent amount of the liquid-absorbent core material 35 can be temporarily held.

As shown in FIG. 4, in order to temporarily hold the body fluid in the hydrophilic layer 50, the dimension of the lateral direction X of the hydrophilic layer 50 (the maximum width dimension of the hydrophilic layer 50) W5 is 40 in the central portion of the crotch region 13. ~60mm is preferred. When the dimension W5 of the lateral direction X of the hydrophilic layer 50 is 40 mm or less, the amount of the body fluid temporarily held in the hydrophilic layer 50 is small, and the lateral leakage of the body fluid occurs, and the dimension W5 in the lateral direction X is obtained. When the thickness is 60 mm or more, the size of the entire absorbent sheet 16 in the lateral direction becomes large, and a gap is generated between the side extension extending portion 61 and the thigh portion. Further, in the central portion of the crotch region 13 where the body fluid is gathered in the wearing state, the narrowest portion of the liquid-absorbent core member 35 is located at the center portion, and the liquid absorption performance is lower than that of the other portions. In the present embodiment, the dimension W5 in the lateral direction X of the hydrophilic layer 50 is 40 to 60% of the dimension W4 in the lateral direction of the narrowest portion of the liquid-absorbent core member 35, so that the hydrophilic layer can be used. The body fluid that is not absorbed by the liquid-absorbent core member 35 is prevented from being generated by lateral leakage of the body fluid over the leak-proof side 60.

In addition, the side extension portion 61 has the first hydrophobic layer 51 on the non-skin opposing surface side of the hydrophilic layer 50 and the second hydrophobic layer 52 on the skin facing surface side on which the hydrophilic layer 50 is coated. Therefore, it is possible to suppress the occurrence of leakage of the body fluid which is diffused to the both side edges of the hydrophilic layer 50 and is absorbed to the outside. Further, the first and second hydrophobic layers 51 and 52 are formed by bending the covered sheet 32 so as to surround the entire hydrophilic layer 50, and the first and second hydrophobic layers are formed by extending the overhanging portion 61. 51 and 52 are also located outside the lateral direction X of the hydrophilic layer 50, so that no body fluid leaks to the outside.

The first hydrophobic layer 51 has a three-layer structure including the both side portions 42 of the covering sheet 32, the main body portion 41, and the leakage preventing film 34, and the second hydrophobic layer 52 has the both side portions 42 formed by the covering sheet 32. In the two-layer structure, the first and second hydrophobic layers 51 and 52 are formed by laminating a plurality of hydrophobic sheets, and therefore have excellent body fluid leakage resistance as compared with the case where they have a single layer structure. Further, the hydrophilic layer 50 has a four-layer structure including the inner sheet 31 and the extending portions 31A and 36A of the core wrapping sheet 36, and the number of laminated sheets is smaller than that of the first and second hydrophobic layers. 51, more than 52 layers of construction. Since the hydrophilic layer 50 has a multilayer structure, a larger amount of body fluid can be temporarily held than when the single layer structure is provided. Further, in the natural state (the state in which the force is not applied to the disposable diaper 10 in any direction), the liquid-absorbent structure 30 has the thickness direction Z of the central portion of the liquid-absorbent core member 35 in the lateral direction X. When the size of the side extension portion 61 is compared with the dimension of the thickness direction Z of the side extension projection portion 61, when the dimension of the thickness direction Z of the same or side extension projection portion 61 is large, the rigidity of the side extension projection portion 61 can be made larger. High, therefore, it is easy to maintain the shape of the buttocks. In the present embodiment, it is desirable that the dimension of the liquid-absorbent core member 35 in the thickness direction Z is 1.5 to 6.0 mm, and the dimension of the thickness direction Z of the side extension projecting portion 61 is 2.5 to 7.0 mm, whereby the wearing feeling can be obtained. The impact of appearance is small. Further, the dimensions of the liquid-absorbent core member 35 and the side extension portion 61 in the thickness direction Z can be measured using a PEACOCK dial thickness gauge JB manufactured by Ozaki Seisakusho Co., Ltd., respectively. These measurements were carried out by using a circular measuring terminal having a diameter of 50 mm and adjusting the pressure to 10 gf/cm ² .

Further, the elongation stress of the expansion/contraction region in which the rear lower waist elastic body 23B is disposed is preferably lower than the elongation stress of the expansion and contraction region in which the front lower waist elastic body 20B is disposed. When the rear end portion 19B of the absorbent sheet 16 and the front end portion 19A intersect with the front and rear waist elastic bodies 20B and 23B, and the size of the lateral direction X is reduced by the contraction force, the rear end portion 19B is contracted by the front end portion. The amount of contraction of 19A is small, and the lateral dimension of the rear end portion 19B is larger than the lateral dimension of the distal end portion 19A. Therefore, the wearer can cover the entire buttocks before wearing, and can be visually recognized and fully absorbed. The body fluid that is excreted toward the side of the back waist region 12 can provide a sense of security. Moreover, since the lateral dimensions of the rear end portions 19A and 19B are different from each other before the front and rear waistline sheets 14 and 15 are seen, the front and rear of the disposable diaper 10 can be easily identified. Further, the width of the absorbent sheet 16 in the lateral direction X is small except that the width of the end portion 19A before the see-through is narrower than that of the rear end portion 19B. Thus, it is possible to give an impression of neatness in the front view of the disposable diaper 10. Therefore, even if the wearer wears the fitted clothes, the outer shape of the disposable diaper 10 is not clearly recognized from the clothes, and the wearer who wears the disposable diaper 10 can reduce the resistance to wearing.

<Method for Measuring Elongation Stress in Expansion and Contraction Area>

The elongation stress of each of the stretchable regions was measured by the following method using a pull tester (manufactured by Shimadzu Corporation). First, in the disposable diaper 10 (the size of the paper diaper for adults, and the dimension W1 in the horizontal direction is 600 mm), the seam 25 is peeled off, and the front and rear waist sheets 14 and 15 are separated, and the front and rear waists are joined via an adhesive. The front and rear end portions 19A and 19B of the absorbent sheet 16 on the inner surface of the sheets 14 and 15 are removed from the waistline sheets 14 and 15 and then cut out from the front and rear waist sheets 14 and 15 at a width of 140 mm. Each of the stretch regions of the waist elastic bodies 20B and 23B was used as each sample. Then, the movable jig (upper jig) holds the one end of the sample and holds the other end with the fixed jig (low jig), and measures the elongation stress (N) at the following time point, that is, from the jig When the distance is 300 mm, the movable jig is moved upward at a speed of 300 mm/min until the distance between the jigs is 425 mm, and the motion is reversed. When the distance between the jigs is 300 mm, the motion is reversed again until the motion is reversed. The distance between the jigs was separated into an elongation stress (N) at a time point of 425 mm.

As a result of the measurement, the expansion stress of the stretch region of the lower waist elastic body 23B is about 16 N/m, and the front lower waist elastic is disposed. The elongation stress of the stretch region of the body 20B is about 21 N/m. Further, as a result of the same measurement method, in the L-sized disposable diaper 10, the former is about 3.5 N/m, the latter is about 10 N/m, and in the XL-sized disposable diaper 10, the former is about 18 N/m, and the latter is about 23N/m.

As shown in FIG. 2, as described above, the both side edges 35c and 35d of the liquid-absorbent core member 35 have a shape that is curved inward in the lateral direction X, and is formed in the central portion of the crotch region 13 and the leakage-preventing side 60. The base ends 62 are furthest apart. The liquid-absorbent core member 35 is semi-rigid which is higher in rigidity than the sheet member, and when the liquid-absorbent core member 35 is located in the vicinity of the proximal end portion 62, the base end portion 62 is affected by the rigidity, resulting in difficulty in standing up. However, since the proximal end portion 62 is farthest from the liquid-absorbent core member 35 in the central portion of the crotch region 13 where the body fluid is most likely to gather, the leakage preventing side 60 is prevented from standing up, and lateral leakage of the body fluid can be prevented.

Further, as shown in Fig. 5, in the present embodiment, the outer joint region 46 of the side extending projection 61 and the inner joint region 47 of the base end portion 62 forming the leak-proof side 60 are mutually mutually in the lateral direction X. Separation. Thus, by separating the outer joint region 46 from the base end portion 62, the side extension projecting portion 61 and the leakage preventing side edge 60 are not affected by the mutual elongation and contraction, and can stand up independently. However, as long as the side extension projection 61 and the leakage prevention side 60 can stand up independently of each other, in order to simplify the manufacturing process of the disposable diaper 10, it is also possible to apply the outer joint region 46 and the inner joint region 47 in a continuous manner. The sheet 32 is coated.

<First Modification>

Fig. 7 is an enlarged view similar to Fig. 5 showing an example of a modification of the disposable diaper 10. The basic configuration of the disposable diaper 10 of the present modification is the same as that of the present embodiment, and only differences will be described below.

In the present modification, a part of the hydrophilic layer 50 on both side edges of the liquid-absorbent structure 30 is bent together with the both side portions 42 of the covering sheet 32, and is fixed to the inner sheet opposite thereto via the joint region 81. 31. In the present modification, since the most laminated portion 82 having the largest number of laminated sheets in the side extending projection portion 61 has a 13-layer structure, the thickness of both sides of the absorbent sheet 16 is larger than that of the first embodiment. It is thicker and more rigid.

<Second Modification>

Fig. 8 is an enlarged view similar to Fig. 5 showing an example of a modification of the disposable diaper 10. The basic configuration of the disposable diaper 10 of the present modification is the same as that of the present embodiment, and only differences will be described below.

In the present modification, the outer edge portion 32b of the covering sheet 32 is superposed on all the leg elastic bodies 65 in a plan view angle, and the number of the foot elastic bodies 65 is increased as compared with the above-described embodiment, by the foot elastic body 65. The formed foot elastic region 65a overlaps the side elastic region 64a formed by the side elastic body 64 in a plan view, and the leakage preventing side 60 overlaps the side extending projection 61 in a plan view.

According to the foregoing configuration, the number of the pleats 61a formed per unit area of the side extension extending portion 61 is smaller than the number of the pleats 60a formed per unit area of the leakage preventing side 60, so that the longitudinal direction is Y on A portion adjacent to the inner side of the end joint region 48 can form a space between the side extension portion 61 and the leakage preventing side 60 via the hydrophilic layer 50, and the air permeability of the disposable diaper 10 can be improved.

In the present specification, the foot elastic body 65 is disposed between the leakage preventing film 34 and the skin facing surface side outer edge portion 42A of the already-coated bending sheet 32, but the foot elasticity is described. The body 65 may be located between the leak-proof film 34 and the non-skin facing side outer edge portion 42A of the already-folded cover sheet 32, or may be located at the inner sheet 31 that has been bent and has been bent. The skin of the covered sheet 32 is between the facing sides.

In the present specification, as an example of the disposable wearing article, three sheet members of the front and rear waist sheets 14 and 15 forming the front and rear waist regions 11, 12 and the absorbent sheet 16 forming the crotch region 13 are used. The paper diaper 10 is exemplified as an example. However, the front and rear waist sheets 14 and 15 may be formed as a non-different body, and may be formed by one annular waist sheet continuously extending in the waistline direction.

In addition to the materials described in the present specification, the constituent members of the disposable wearing article can be used without any restrictions, and various conventional materials generally used in the field of such articles can be used without limitation. In addition, the terms "first" and "second" used in the specification and the claims are used to distinguish the same elements, positions, and the like.

16‧‧‧Absorbing flakes

16c, 16d‧‧‧ both sides

30‧‧‧Aspirating structure

31‧‧‧Inside flakes

31A‧‧‧Extension of the inner sheet

31b‧‧‧Outside edge

31c‧‧‧ bend line

32‧‧‧ Covered sheets

33‧‧‧Absorbers

34‧‧‧ leakproof film

35‧‧‧Aspirating core material

35c‧‧‧ both sides

35d‧‧‧ both sides

36‧‧‧ core material wrapped sheet

36A‧‧‧Extension of the core wrapping sheet

41‧‧‧ Main body

42‧‧‧ both sides

42A‧‧‧Outer edge

43‧‧‧1st bend line

44‧‧‧2nd bend line

46‧‧‧Outer joint area

47‧‧‧Inside joint area

49‧‧‧ joint area

50‧‧‧Hydrophilic layer (liquid diffusing layer)

51‧‧‧1st hydrophobic layer (hydrophobic layer)

52‧‧‧2nd hydrophobic layer (hydrophobic layer)

60‧‧‧ leak-proof side

61‧‧‧ Side extension

62‧‧‧ base end

63‧‧‧Free Department

64‧‧‧Side edge elastomer

65‧‧‧foot elastomer

W4‧‧‧ dimensions in the horizontal direction

W5‧‧‧Dimensions in the horizontal direction X

W6‧‧‧Separate dimensions of the lateral elastomers in the transverse direction

Separation dimensions of the transverse direction of the W7‧‧‧ foot elastomer

Claims (7)

A disposable wearing article having a longitudinal direction, a transverse direction and a thickness direction, and comprising: a skin facing surface and a non-skin facing surface; a front waistline sheet forming a front waist region; forming a back waist region a back waist sheet; an absorbent sheet positioned between the front and rear waist sheets and forming a crotch region; a liquid-absorbent core; and a pair of the skin facing side of the absorbent sheet extending in the longitudinal direction The leakage preventing side is characterized in that: the leakage preventing side has a base end portion extending in the longitudinal direction; and a free portion in which a plurality of side elastic members that can expand and contract in the longitudinal direction are disposed, and has a foot elasticity a side extending from the side extending in the longitudinal direction is located outside the lateral direction of the proximal end portion of the leakage preventing side, and the number of sheets forming the side extending projection is more than the leakage prevention The number of sheets of the side sheets is large, and a plurality of the side elastic bodies that can expand and contract in the longitudinal direction are disposed on the side extension portion, and the stretch ratio of the foot elastic body is higher than the side edge elasticity The small elongation ratio, the transverse direction dimension of the separation between the leg elastic member is relatively large separation of the side edges of the lateral direction elastic body size. The disposable wearing article according to the first aspect of the patent application, wherein the number of wrinkles per unit area in the side extension extending portion is larger than that per unit formed on the leakage preventing side Number of folds in the area Less. The disposable wearing article according to claim 1 or 2, wherein the absorbent sheet system has a front end portion located before the front and rear waistline sheets, and the front and rear waist sheet sheets respectively extend in the lateral direction. a plurality of front and rear waist elastic bodies, wherein an elongation stress of the elastic body overlapping the front end portion of the absorbent sheet body in the front waist elastic body in a planar viewing angle is higher than that in the front waist elastic body in a plane viewing angle The elastic body in which the rear end portions of the absorbent sheet are overlapped with each other has a high elongation stress. The disposable wearing article according to claim 1 or 2, wherein the side extending portion has a liquid diffusing layer; and the hydrophobicity of the liquid diffusing layer is covered in the thickness direction Floor. A disposable wearing article according to the fourth aspect of the invention, further comprising: a liquid-permeable inner surface sheet covering the skin facing surface side of the liquid-absorbent core material, wherein the liquid diffusing layer has An extending portion of the inner sheet extending from the both side edges of the liquid-absorbent core member further outward in the lateral direction. A disposable wearing article according to claim 4, further comprising a core wrapping sheet covering the liquid absorbing core material, wherein the liquid diffusing layer has a liquid absorbing core material The side edges of the core material wrapping sheet extending outwardly from the side edges further extend toward the outer side in the lateral direction. A disposable wearing article, as claimed in claim 5, wherein the aforementioned extension of the inner sheet is along the longitudinal direction The bending line extending in the direction is bent toward the non-skin opposing surface side of the liquid-absorbent core material.