KR20100038369A

KR20100038369A - Disposable diaper

Info

Publication number: KR20100038369A
Application number: KR1020107000711A
Authority: KR
Inventors: 유키 호리에; 사다나오 마나베; 아키노리 후카에; 마사히로 카네다
Original assignee: 다이오 페이퍼 코퍼레이션
Priority date: 2007-06-15
Filing date: 2008-06-13
Publication date: 2010-04-14
Also published as: JP5118909B2; CN101677898A; WO2008153144A1; JP2009018095A; CN101677898B; KR101443948B1

Abstract

[PROBLEMS] A disposable diaper in which deformation of an absorption core does not cause separation of the joint between an inner body and a belly-side or rear-side outer sheet nor does it cause deterioration in appearance and wearing comfort. [MEANS FOR SOLVING PROBLEMS] In the disposable diaper, a front end section of the inner body (20) is connected to the inner surface at the lateral center of the belly-side outer sheet (12F), a rear end section of the inner body (20) is connected to the inner surface of the lateral center of the rear-side outer sheet (12B), and the belly-side outer sheet (12F) and the rear-side outer sheet (12B) do not continue to each other on the crotch side. The disposable diaper is constructed to satisfy the relationships of 90 mm <= W1 < W2 <= 190 mm, 0 mm <= L1-L2 <= 70 mm, and 0 mm <= L3-L4 <= 50 mm, where L1 is the length of an absorption-core front end section (56F), L2 the length of the portion of overlap between the absorption core (56) and the rear-side outer sheet (12B), L3 the length of an absorption-core rear end section (56B), L4 the length of the portion of overlap between the absorption core (56) and the rear-side outer sheet (12B), W1 the width of a narrow section (56N), and W2 the width of the absorption-core front end section and the absorption-core rear end section.

Description

Disposable Diapers {DISPOSABLE DIAPER}

The present invention relates to a disposable diaper.

In general, the pants-type disposable diaper has an outer sheet in which both sides of the front body and both sides of the body are joined to each other to form a joint at both sides, and a trunk opening and a pair of left and right leg openings, and an inner surface thereof. It is equipped with the internal body fixed in the range from the stomach to the dorsal side through the groin along the center of the width direction, and is mounted by inserting both legs of the wearer into the leg opening through the trunk opening. The interior body includes an absorbent core formed of a liquid-permeable surface sheet and a fiber assembly disposed on its outer surface side. As a fiber aggregate, the thing formed by integrating pulp fiber is common.

Regarding the kind of using such an integrated exterior sheet, a disposable diaper which should be referred to as a two-part type in which an exterior sheet is divided into two on the back and the back is recently proposed (see Patent Document 7, for example). The two-segmentation type has few trims when drilling a leg opening at the time of manufacture, and each material of a dorsal exterior sheet and a dorsal exterior sheet can be selected individually, and at the time of wearing There is an advantage that it is easy to wear (easy to coat) because it is easy to pass, and it is easy to move the legs during installation.

[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-340380

[Patent Document 2] Japanese Patent Application Laid-Open No. 2002-159528

[Patent Document 3] Japanese Patent Application Laid-Open No. 2005-065729

[Patent Document 4] Japanese Patent Application Laid-Open No. 2002-291799

[Patent Document 5] Japanese Patent Application Laid-Open No. 2004-081369

[Patent Document 6] Japanese Patent Application Laid-Open No. 2000-005230

[Patent Document 7] Japanese Patent Application Laid-Open No. 2005-027839

In the two-segment type, since the shape of the absorbent core strongly affects the degree of freedom of the legs, it is preferable to clamp the middle portion of the absorbent core in the longitudinal direction as long as possible in order to increase the fit of the legs.

However, in the two-segment type, the area of the bonding portion between the interior body, the back exterior sheet, and the back exterior sheet is extremely small, and the force applied to the interior body concentrates on the bonding portion, so only the absorbent core is considered in consideration of the fit. If the rigidity of the absorbent core is lowered, the absorbent core deforms as shown in Fig. 12, thereby deteriorating the aesthetics and the feeling of wearing such as peeling off the adhesion between the internal body and the dorsal exterior sheet or the dorsal exterior sheet, or protruding hips. There was a fear of causing.

In addition, in the two-divided type, the area of the exterior sheet pressing the circumference of the leg is narrowed, and the degree of freedom around the leg increases, so that a gap is likely to occur around the leg.

On the other hand, in a disposable diaper, in order to prevent so-called horizontal leakage (lateral leakage), provision of band-shaped barrier cuffs lined in the front-rear direction along both widthwise side portions is fixed, and excellent fitability Various barrier cuffs have been proposed to obtain a leak preventing effect and to provide a fresh appearance of the groin.

In particular, the so-called barrier cuff structure (see Patent Documents 1 and 2), which is referred to as a "fresh shape," removes barrier cuffs that are conventionally disposed on the exterior sheet, and an exterior sheet is formed at both edges of the groin. The barrier cuff standing up from the back side of the intestine does not exist and stands up as if the side of the intestine is lifted up so that the freshness and the leakage preventing effect can be achieved.

As another technique, in order to obtain a further leakage preventing effect, it is also proposed to provide a double barrier cuff (see Patent Document 6). In addition, as a technique of the same kind, a planar corrugation in addition to the double barrier cuff is also proposed (see Patent Documents 4 and 5).

However, as shown in Patent Literature 6, even when the barrier cuff is provided in duplicate, since double wrinkles mostly stand in an overlapped state, a double leakage preventing effect was not obtained in practice. Further, as shown in Patent Documents 4 and 5, the inner barrier cuff is provided so as to stand on the surface side of the interior body, and the standing start point is located on the width direction center side of the interior body side border, and is located in the width direction outside than this. Even if the side of the interior is to function as an outer pleat, since this outer pleat is inherently internal, it is difficult to secure sufficient standing dimensions, and even if the standing dimensional is excessively large, the inner and outer barrier cuffs easily overlap, In any case, the effect of preventing leakage cannot be sufficiently improved. Therefore, the exterior sheet also requires wrinkles around the legs (flat wrinkles), thereby harming the fresh appearance.

Therefore, the main subject of this invention is to obtain the pants type disposable diaper which makes a leg pass easily at the time of wearing, makes the appearance at the time of wearing, and is hard to produce a clearance around a leg, especially the above-mentioned in a two-part type It's about solving the problem.

Another object is to provide a double barrier cuff structure that has a neat appearance and exhibits excellent leakage preventing effect in order to solve the above problems in a pants type disposable diaper.

The present invention which solved the said subject is as follows.

It consists of a dome exterior sheet covering the stomach and the dorsal exterior sheet covering the back of the body circumference of the wearer, and the width direction of the dorsal exterior sheet with the top edge of the dorsal exterior sheet and the top edge of the dorsal exterior sheet aligned. A cylindrical body circumference formed by joining the joints of both edges and the joints of the widthwise both edges of the dorsal exterior sheet,

The front end is connected to the inner surface of the central portion in the width direction of the dorsal exterior sheet, and the rear end is connected to the inner surface of the central portion in the width direction of the dorsal exterior sheet, and from the dorsal side to the belly through the groin. It has a built-in body covering the,

The interior is provided with an absorbent core formed of a liquid-permeable surface sheet and a fiber assembly disposed on its outer surface side,

In the pants type disposable diaper in which the dorsal exterior sheet and the dorsal exterior sheet are separated from each other without being continuous in the groin side,

The absorbent core is located between the front end, the rear end, and between them, and has a narrow tightening part compared with the front end and the rear end,

The front and rear length of the absorbent core front end is L1, the front and rear length at the overlapped portion of the absorbent core and the rear facing sheet is L2, and the front and rear length of the rear end of the absorbent core is L3, and the absorption When the length in the front-rear direction at the overlapped portion of the core and the dorsal exterior sheet is L4, the minimum width of the tightening part is W1, the width of the front end of the absorbent core and the width of the rear end of the absorbent core are W2. A pants-type disposable diaper, characterized by satisfying the same formulas (1) to (3).

70 mm ≤ W1 <W2 ≤ 190mm. (One)

0 mm ≤ L1-L2 ≤ 70mm. (2)

0 mm ≤ L3-L4 ≤ 50mm. (3)

(Action effect)

In the pants type disposable diaper according to the present invention of the present invention, the width of the absorbent core is sufficiently secured by satisfying the condition of the formula (1), and the wider absorbent core is made by the high water condition of the formulas (2) and (3). The front end and the rear end are more fully lined on the groin side than the lower edges of the dorsal and dorsal exterior sheets. As a result, the highly rigid portion of the absorbent core is more lined on the groin side than the lower edge of the dorsal and dorsal sheaths, so that the force is concentrated on the bonding portion between the interior and the dorsal and dorsal sheaths. Also, the absorbent core is less likely to be deformed, thereby reducing the possibility of causing deterioration of the appearance and fit, such as peeling off the adhesion between the interior body and the dorsal exterior sheet or the dorsal exterior sheet, or the hips sticking out.

In the interior, at least in the vicinity of the intersection of the widthwise both edges of the interior and the bottom edge of the ventilated exterior sheet and the intersection of the widthwise both edges of the interior and the bottom edge of the dorsal exterior sheet, the rigidity is 15 to 50. The pants type disposable diaper according to claim 1, which is cN / 50 mm.

(Action effect)

If the rigidity of at least part of the interior of the interior of the interior is within the scope of the interior of the invention, the effect of the invention of each of the above-described items is further added.

A band-shaped barrier cuff standing on both sides of the inner body in the width direction of the inner body is provided from the front end to the rear end of the inner body along the front and rear direction.

The front part and the back part of the barrier cuff, the front part and the back part of the barrier cuff are fixed to the surface sheet while being folded so as not to stand, and the middle part is unfixed and at least this middle part. The elastic elongate member of elongate shape is fixed to the part in the state extended along the front-back direction,

Claim 1 of Claim 1 comprised so that following formula (4) and (5) may be satisfy | filled, when the length of the front-back direction of the front part of the said barrier cuff is set to L5, and the length of the front-back direction of the rear part of the said barrier cuff is set to L6. Pants type disposable diaper.

L2 '<L5' ... (4)

L4 '<L6' ... (5)

(Action effect)

The invention of the present invention is intended to increase the rigidity of both side portions of the interior body by using fixing by adhesion required to the front portion and the rear portion for the rise of the barrier cuff. Characteristically, by satisfying the conditions of the above formulas (4) and (5), the force tends to be concentrated by the fixing portion of the barrier cuff, and the rigidity of both sides of the interior body in the vicinity of the lower edge of the dorsal exterior sheet and the dorsal exterior sheet. This improves. Therefore, the effect of invention of each above-mentioned description is further added.

The pants type disposable diaper according to claim 1, wherein the absorbent core has a fiber density at both sides of the width direction at each of the front end of the absorbent core and the rear end of the absorbent core higher than the fiber density of the middle part in the width direction.

(Action effect)

The invention of the present invention is characterized in that only at both the front and rear ends of the absorbent core are densified in the widthwise both sides. By making such a high density, it is easy to concentrate a force, without sacrificing the characteristics required for an absorbent core, and the rigidity of the both sides of the interior body in the vicinity of the lower edge of a belly exterior sheet and a back exterior sheet improves. Therefore, the effect of invention of each above-mentioned description is further added.

A band-shaped inner barrier cuff is provided along the widthwise both sides of the interior body in the front-rear direction, and at the same time, the band-shaped band is arranged in the front-rear direction along the width-wise side of the interior body outside the inner barrier cuffs. The outer barrier cuffs are provided respectively,

The said inner barrier cuff becomes an inner side attachment part by which the edge part of the width direction one side was fixed with respect to the edge part of the width direction of the said interior body, and the part other than this inner side attachment part protrudes from an inner side attachment part. The inner and outer ends are fixed to the surface of the surface sheet, and the front and rear middle portions become unfixed inner free portions, and are thinner at least at the far end of the inner free portions along the front and rear directions. The elongated elastic member is fixed in the extended state,

The outer barrier cuff is an outer attachment portion whose one end in the width direction is fixed with respect to the back side portion at the end in the width direction of the interior, and portions other than the outer attachment portion protrude from the outer attachment portion. And an outer protruding portion, both front and rear ends of the outer protruding portion line the surface of the front and rear end portions of the inner protruding portion in the inner barrier cuff through the side of the inner body from the outer attachment portion. Consisting of a bamboo side portion fixed to the front and rear ends of the protruding portion, and a terminal side portion folded back and outward from the end of the bamboo side portion and fixed to the bamboo side portion; A shape that becomes a positive outer free portion and is elongated along the front-back direction at least at the end of the outer free portion The pants type disposable diaper according to claim 1, wherein the elastic member is fixed in an extended state.

(Action effect)

According to the invention of the present invention, the barrier cuff is formed in both inside and outside, and the fixing portions of the front and rear ends at the inner protrusions of the inner barrier cuff are not folded back, and both front and rear ends of the outer protrusions of the outer barrier cuff are not folded. It is characterized by being folded back in the width direction and arranged so that the outer attachment portion of the outer barrier cuff is placed on the rear side portion of the interior. If the outer attachment portion of the outer barrier cuff is located on the rear surface side of the interior, the outer barrier cuff stands up so as to open outward in the width direction at the middle portion in the front-rear direction, and the fit is improved because the outer barrier cuff is brought into contact with the surface around the leg. In addition, since the fixing portions of the front and rear ends at the inner protrusions are not folded back, the fixing portions of the front and rear ends at the outer protrusion portions are folded back in the width direction outwards, so that the inner and outer barrier cuffs Since the separation between the outer free portions is maintained, the inner and outer barrier cuffs stand erectly at wide intervals, and each fits around the leg, thereby providing excellent leakage preventing properties. That is, since the barrier cuff of the shape which is excellent in standing property and is easy to touch a skin to a double fits in the spaced apart position, the leakage of excreta can be prevented reliably.

The said inner side attachment part is a disposable diaper of Claim 5 fixed to the site | part which the edge part of the width direction one side of the said inner barrier cuff includes the surface side part in the width direction edge part of the said interior body.

(Action effect)

The invention of the present invention is characterized in that the inner attachment portion of the inner barrier cuff is disposed at a portion including the surface side portion of the interior body. Since the inner attachment portion of the inner barrier cuff is located on both sides of the surface of the interior, the boundary between the inner attachment portion and the inner protrusion, which is the starting point of standing, is separated from the side edge of the interior body to the widthwise center side, and the inner and outer sides are separated. By the contracting force of the elastic member of the barrier cuff, not only the inner and outer barrier cuffs stand on the body side, but also the sides of the width direction outside the inner protruding portion of the internal body stand on the body side, and the side of the internal body It functions as an intermediate barrier between the inner and outer barrier cuffs, and also functions as a spacer for keeping the inner and outer barrier cuffs in a spaced apart state.

As a result, in the invention of the present invention, the inner and outer barrier cuffs stand at wider intervals, and each fits around the leg at an appropriate position.

The disposable diaper according to claim 6, wherein a boundary between the inner attachment portion and the inner protrusion portion is disposed so as to terminate the tightening portion in the front-rear direction.

(Action effect)

In the case where the absorbent body has a tightening portion, the degree of freedom around the legs is further increased, so that a gap is likely to occur around the legs. The barrier cuff mentioned above is excellent in fitability around the legs, but especially when the fastening portion is provided in the absorbent core, the barrier barrier cuffs stand on the line terminating the tightening portion by being configured as described in this section. It becomes possible to further improve the fit.

In the diaper deployment state, a boundary between the inner attachment portion and the inner protrusion portion is located at a portion of 3 to 20 mm from the side edge on the interior surface side to the width direction center side, and the outer attachment portion and the outer protrusion portion The disposable diaper according to claim 7, wherein the boundary is located at a portion of 5 to 30 mm from the side edge on the back side of the interior body to the width direction center side.

(Action effect)

When the width of the surface-side portion of the interior body in which the inner attachment portion is fixed is within the scope of the present invention, the above-described effect is further added.

In the interior, the outer surface side of the absorbent core is covered with a liquid-impermeable sheet, and the liquid-impermeable sheet turns both sides in the width direction of the absorbent core and the inner attachment portion on the surface sheet side of the absorbent core and the The disposable diaper of claim 8 lined up to a position corresponding to a boundary with an inner protrusion.

(Action effect)

In the invention of the present invention, since a small amount of excrement beyond the inner barrier cuff can be prevented at both sides of the viscera which is lifted between the inner and outer barrier cuffs, the liquid impermeable to the side surface side of the viscera, as described in the present invention. By embedding the sheet, it is possible to effectively prevent a small amount of excrement urine or thin stool water from leaking out of the inner barrier cuff. In addition, since the liquid-impermeable sheet used as the back side member of the interior body is used, the increase in material cost is small and the complexity of the manufacturing process can be avoided.

The width of the inner protruding portion is wider than the width of the surface side portion of the internal body to which the inner attaching portion is fixed,

The sum of the width of the portion located on the surface side of the interior of the diaper in the unfolded state of the diaper of the outer protruding portion and the width of the end portion of the outer protruding portion is such that the inner attachment portion is fixed. It is wider than the width of the surface side part of the internal organs,

The disposable diaper according to claim 9, wherein the inner barrier cuff and the outer barrier cuff do not have a liquid impermeable sheet.

(Action effect)

In the case where the liquid-impermeable sheet is lined up to the side edges of the interior body as described above, if the side portions of the interior body stand up high, the ventilation around the legs may be impaired, which may cause discomfort to the wearer after excretion. On the other hand, by adopting the structure as described in the present invention, the low impermeability due to the inherent nature of the liquid-impermeable sheet is only the side of the interior which is low in height and hardly obstructs ventilation. The inner and outer barrier cuffs can maintain high breathability. Therefore, high ventilation can be maintained, without impairing the above-mentioned bleeding prevention effect.

In a disposable diaper having a liquid-permeable surface sheet and an absorbent core disposed on the outer surface side, the inner body covering the back side from the back to the belly through the groin portion, and a sheet-shaped outer body mounted on the outer surface side of the inner body. ,

The said inner barrier cuff becomes an inner side attachment part fixed to the site | part which the edge part of the width direction one side contains the surface side part in the width direction edge part of the said interior body, and the parts other than this inner side attachment part are inner side attachment. An inner protruding portion protruding from the portion, and both front and rear ends of the inner protruding portions are fixed to the surface of the surface sheet, and the front and rear middle portions become an unfixed inner free portion, and the inner free portion is at least the front and rear portions. An elongated elastic member is fixed in the stretched state along the direction,

The outer barrier cuff is an outer attachment portion whose one end in the width direction is fixed with respect to the back side portion at the end in the width direction of the interior, and portions other than the outer attachment portion protrude from the outer attachment portion. It becomes an outer protrusion part, The front-back both ends of this outer protrusion part line up from the outer side attachment part to the surface of the front-back direction both ends of the inner side protrusion part in the said inner barrier cuff through the side part of the said interior body, It consists of the bamboo side part fixed to the surface of both ends of the front-back direction of the protrusion part, and the back side part which is bent to the width direction outer side from the end of this bamboo side part, and is the terminal side part fixed to the said bamboo side part, and the middle part of the front-back direction is remarks It becomes a positive outer free part, and is thin along at least one terminal part of this outer free part along the front-back direction With a long-shaped elastic member is secured under tension to, disposable diaper, characterized in that.

(Action effect)

According to the invention of the present invention, the barrier cuff is formed in both inside and outside, and the fixing portions of the front and rear ends at the inner protrusions of the inner barrier cuff are not folded back, and both front and rear ends of the outer protrusions of the outer barrier cuff are not folded. Fold back in the width direction and arrange | position the inner side attachment part of an inner barrier cuff to the site | part including the surface side part of an internal body, and arrange | position the outer side attachment part of an outer barrier cuff to the back side part of an internal body It is characterized by.

If the outer attachment portion of the outer barrier cuff is located on the rear surface side of the interior, the outer barrier cuff stands up so as to open outward in the width direction at the middle portion in the front-rear direction, and the fit is improved because the outer barrier cuff is brought into contact with the surface around the leg.

In particular, since the inner attachment portion of the inner barrier cuff is located on both sides of the interior surface of the inner body, the boundary between the inner attachment portion and the inner protruding portion, which is the starting point of standing, is separated from the side edge of the inner body in the width direction center side. The inner and outer barrier cuffs not only stand on the body side by the contracting force of the elastic members of the inner and outer barrier cuffs, but also the side portions of the outer side in the width direction of the inner part of the inner body stand up to the body side. The side portion of the lateral side functions as an intermediate barrier between the inner and outer barrier cuffs, and also serves as a spacer for keeping the inner and outer barrier cuffs in a spaced apart state.

As a result, in the invention of the present invention, the inner and outer barrier cuffs stand at wide intervals without overlapping each other, and each fits around the leg at an appropriate position. That is, since the barrier cuff of the shape which is excellent in standing property and is easy to contact with a surface by skin double-fits in the separated position, it looks visually refreshing and exhibits the outstanding leak prevention effect.

In the diaper development state, a boundary between the inner attachment portion and the inner protrusion portion is located at a portion of 3 to 20 mm from the side edge on the surface of the interior body side to the center in the width direction, and the outer attachment portion and the outer protrusion portion are separated from each other. The disposable diaper according to claim 11, wherein the boundary is located at a portion of 5 to 30 mm from the side edge on the back side of the interior body to the width direction center side.

(Action effect)

In the diaper development state, a boundary between the inner attachment portion and the inner protrusion portion is located at a portion of 3 to 20 mm from the side edge on the surface of the interior body side to the center in the width direction, and the outer attachment portion and the outer protrusion portion are separated from each other. The disposable diaper according to claim 12, wherein the boundary is located at a portion of 5 to 30 mm from the side edge on the back side of the interior body to the width direction center side.

(Action effect)

In disposable diapers, it is also proposed to laminate a liquid-impermeable sheet inside the barrier cuff in order to prevent liquid leakage from the barrier cuff. In the liquid-impermeable sheet inside the barrier cuff, the liquid-impermeable sheet covering the back side of the absorbent core in the interior is lined up inside the barrier cuff, or a separate sheet is laminated in the barrier cuff (see Patent Document 3). . However, when the liquid-impermeable sheet is embedded inside the barrier cuff, there is a problem that the manufacturing cost is complicated due to the material cost.

In the invention of the present invention, since a small amount of excrement beyond the inner barrier cuff can be prevented at both sides of the viscera which is lifted between the inner and outer barrier cuffs, the liquid impermeable to the side surface side of the viscera, as described in the present invention. By embedding the sheet, it is possible to effectively prevent the leakage of a small amount of excrement urine or thin stool water beyond the inner barrier cuff. In addition, since the liquid-impermeable sheet used as the back side member of the interior body is used, the increase in material cost is small and the complexity of the manufacturing process can be avoided.

The inside of the inner side where the inner attachment portion is fixed by the sum of the width of the portion of the diaphragm side of the outer protruding portion located on the surface side of the viscera in the diaper deployment state and the width of the last side portion of the outer protruding portion. It is wider than the width of the surface side part of the sieve,

The disposable diaper according to claim 13, wherein the inner barrier cuff and the outer barrier cuff do not have a liquid impermeable sheet.

(Action effect)

In the case where the liquid-impermeable sheets are lined up to the side edges of the interior body as described above, if the side portions of the interior body stand up high, the ventilation around the legs may be impaired, which may cause discomfort to the wearer after excretion. On the other hand, by adopting the structure as described in the present invention, the low impermeability due to the inherent nature of the liquid-impermeable sheet is only the side of the interior which is low in height and hardly obstructs ventilation. The inner and outer barrier cuffs can maintain high breathability. Therefore, high ventilation can be maintained, without impairing the above-mentioned bleeding prevention effect.

The exterior body comprises a dorsal exterior sheet covering the dorsal side and a dorsal exterior sheet covering the dorsal side of the wearer's torso, and having the top edge of the dorsal exterior sheet and the top edge of the dorsal exterior sheet aligned, Is a tubular body circumference formed by joining the junction of the widthwise side edges of the edge portion and the junction of the widthwise both side edges of the dorsal exterior sheet,

The disposable diaper according to claim 11, wherein the front end portion is connected to the inner side of the width direction central part of the dorsal exterior sheet and the rear end is connected to the inner side of the width direction central part of the dorsal exterior sheet.

(Action effect)

In general pants-type disposable diapers, both the whole body side portion and the rear body both side portion are joined to each other, the joint portion is formed on both sides, and an exterior sheet having a trunk opening and a pair of left and right leg openings, and along the width direction center of the inner surface thereof. The internal body is fixed in the range from the stomach to the dorsal side through the groin, and is mounted by passing both legs of the wearer through the trunk opening and inserting it into the leg opening. The interior is provided with an absorbent core formed of a liquid-permeable surface sheet and a fiber assembly disposed on its outer surface side. As a fiber aggregate, the thing formed by integrating pulp fiber is common.

Regarding the type using such an integrated exterior sheet, a disposable diaper which should be referred to as an exterior two-divided type in which the exterior sheet is divided into two on the back and the back is recently proposed (see Patent Document 7, for example). The exterior 2 division type has a few trims (extra waste part) at the time of the opening of the leg opening at the time of manufacture and can choose a material of each of the back exterior sheet and the back exterior sheet individually, and at the time of wearing There is an advantage that it is easy to pass (easy to peel off) because it is easy to pass, and the leg is easy to move during installation.

However, in the exterior two-split type, since the area of the exterior seat | seat which presses around a leg becomes narrow and the freedom degree around a leg increases, there exists a problem that a gap easily arises around a leg. Therefore, it is preferable to make the underwear type disposable diaper of the exterior two-part type like the description of this claim.

The absorbent core is located between the front end, the rear end, and between them, and has a fastening portion that is narrower than the front end and the rear end,

The front end and the rear end of the tightening part are located on the groin side than the lower end of the trunk circumference part,

The minimum width of the tightening portion is 50 to 85% of the width of the front end of the absorbent core and the width of the rear end of the absorbent core,

The disposable diaper according to claim 15, wherein a boundary between the inner attachment portion and the inner protrusion portion is disposed so as to terminate the tightening portion in the front-rear direction.

(Action effect)

In the exterior two-split type, since the shape of the absorbent core strongly affects the degree of freedom of the legs, it is preferable to tighten the front and rear intermediate portions of the absorbent core in order to increase the fit of the legs.

However, when such a fastening part is provided, since the degree of freedom around a leg further increases, a gap tends to arise around a leg. The barrier cuffs described above are excellent in fit to the periphery of the legs, but in particular, when the fastening portion is provided in the absorbent core, the barrier barrier cuffs stand on the line terminating the tightening portion by being configured as described in this section. It becomes possible to further improve the fit.

As described above, according to the present invention, the absorbent core is hardly deformed, which may cause deterioration of the appearance and the feeling of wearing, such as peeling off the adhesion between the internal body and the dorsal exterior sheet or the dorsal exterior sheet or protruding hips. Benefits such as reduction are brought about.

BRIEF DESCRIPTION OF THE DRAWINGS The top view in the state which expanded a diaper which shows the inner surface of a disposable diaper.
It is a top view in the state which expanded the diaper which shows the outer surface of a disposable diaper.
3 is a cross-sectional view taken along line 3-3 of FIG.
4 is a cross-sectional view taken along line 4-4 of FIG.
5 is a cross-sectional view taken along the line 5-5 of FIG.
Fig. 6 is a plan view of the diaper in an unfolded state, showing only the main part of the disposable diaper with dimensions.
7 is a cross-sectional view showing only the main part of the disposable diaper with dimensions.
8 is a front view of a product state.
9 is a rear view of the product state.
Fig. 10 is a plan view of the diaper in an unfolded state in which only the main part of another disposable diaper is shown together with the dimensions.
11 is a cross-sectional view of the groin portion in a mounted state.
12 is a photograph of a conventional example.

(The best mode for carrying out the invention)

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail according to embodiment shown to drawing.

<1st embodiment>

1-9 has shown an example of the pants type disposable diaper which concerns on this invention. In the code | symbol of FIG. 1, a "front-back direction" means the direction which connects a stomach and a dorsal side, "width direction" means the direction orthogonal to a front-back direction, and "up-down direction" is orthogonal to a body circumference direction In other words, it means the direction connecting the waist opening (WO) side and the groin portion side.

The pants-type disposable diaper 10 is a so-called pants-type disposable diaper, which has a dorsal exterior sheet 12F covering the back of the wearer's body and a dorsal exterior sheet 12B covering the back, and the back exterior sheet ( 12A of 12F of widthwise both edges, and 12A of widthwise both edges of the dorsal exterior sheet 12B are joined by heat seal, ultrasonic welding, etc., and the cylindrical body 12 is It is configured to be formed. As shown in the figure, when the dorsal exterior sheet 12B extends below the joint portion 12A, a heat seal or the like is integrally processed in the vertical range including up to this portion, and the dorsal extension portion ( The extended welding part 12E can be provided in 14). By providing the extended welding part 12E, pulling in of the 2nd elongate elastic stretchable member 16 of the dorsal extension part 14 mentioned later can be prevented. In this case, in consideration of the easy tearing of the armpits, the joining portion 12A is made of a set of small welded portions, and it is common to set the joining pattern with a low proportion of the welded area at the joined portion 12A, but the extended welded portion 12E In the easiness of tearing, it is not necessary to consider the tearing, so that the welding pattern may be welded and secured to the second elongated elastic stretchable member 16 by making the ratio of the welded area higher than that of the joint portion 12A. In addition, the extended welded portion 12E is welded to the rim of the hip cover portion 14C with a curved line to prevent the entry of the second elongated elastic member 16 in the hip cover portion 14C. You may.

In addition, the front end of the interior 20 is connected to the inner surface of the central portion 12F of the belly facing sheet 12F by a hot melt adhesive or the like, and to the inner surface of the central portion 12B of the dorsal facing sheet 12B. The rear end of the interior 20 is connected with a hot melt adhesive or the like, and the back exterior sheet 12F and the back exterior sheet 12B are separated from each other in the groin side without being continuous. This separation distance Y may be about 150 to 250 mm.

As can be seen from FIG. 7 and FIG. 8, the upper opening of the body circumference 12 is a waist opening WO through the body of the wearer, and the body circumference 12 of the inner body 20 in both width directions. The portions respectively surrounded by the lower edge of the edge and the side edge of the internal body 20 become the leg openings LO through which the legs pass. In the state which peeled and expanded each junction part 12A, it forms an hourglass shape as shown in FIG. The viscera 20 is lined up from the dorsal side to cover the intestine through the groin part, and is a part that receives the excrement to absorb and retain the liquid, and the body circumference 12 has the viscera 20 against the wearer. It is a supporting part.

(Exterior sheet)

The back exterior sheet 12F and the back exterior sheet 12B are formed by joining two sheets S1 and S2 such as a nonwoven fabric as shown in Figs. 4 and 5, respectively, in order to increase the fit to the body circumference. Between the sheets S1 and S2, elongated elastic elastic members 15 to 19, such as thread rubber, are provided at a predetermined elongation. When using a nonwoven fabric, it is preferable that the basis weight is about 10-30 g / m <^2> . The nonwoven fabric is not particularly limited what the raw material fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, regenerated fibers such as rayon and cupra, natural fibers such as cotton, and the like, and two or more kinds thereof may be used. Mixed fibers, composite fibers, etc. can be illustrated. In addition, the nonwoven fabric may be manufactured by any processing. As a processing method, a well-known method, for example, a span lace method, a span bond method, a thermal bond method, a melt-bronze method, a needle punch method, an air through method, a point bond method, etc. can be illustrated. In addition, as the elongated elastic elastic members 15 to 18, 19T, and 19U, synthetic rubber may be used or natural rubber may be used. Hot melt adhesive or heat seal or ultrasonic bonding may be used for joining both sheets S1 and S2 of the exterior sheets 12F and 12B and fixing the elongated elastic members 15 to 19 sandwiched therebetween. Can be. Firmly fixing the entire surface of the exterior sheets 12F and 12B is not preferable because it inhibits the texture of the sheet. It is preferable to combine these and to make adhesion of the elongate elastic stretchable members 15-19 strong, and to adhere | attach other parts, or to weakly bond.

More specifically, the dorsal exterior sheet 12B has a dorsal body portion 13 that occupies the same up-down direction as the junction 12A and a dorsal extension 14 extending below this dorsal body portion 13. have. The dorsal extension part 14 has the width direction center part 14M which overlaps with the absorptive main body 20, and the seat part cover part 14C extended to both sides.

The shape of the dorsal extension 14 can be determined appropriately, but in the example of illustration, the upper end of the dorsal extension 14 extends below the dorsal body 13 with the same width as the dorsal body 13. The lower part becomes narrower as it approaches the groin side. The part of the same width | variety as the back main-body part 13 can also be abbreviate | omitted. If comprised in this way, as the edge 14e of the width direction outer side of the hip part cover part 14C becomes closer to the groin side, it becomes a straight line or curve shape which becomes closer to the absorbent main body 20 side, and covers the buttocks part. It becomes an easy shape.

Although the dimension of the back extension part 14 can be suitably determined, as shown in FIG. 6, the width direction outer edge 14e of the hip part cover part 14C (width direction outer edge 14e of the hip part cover part 14C). ) And the maximum separation distance in the width direction between the side edges of the absorbent body 20) are 80 to 160 mm, and the length 14y (extension length) in the vertical direction of the hip cover portion 14C is 30 to 80 mm. It is more preferable if it is. In addition, if the area of the rectangle defined by the widest part in the width direction of the dorsal extension part 14 and the widest part in the vertical direction is S, the area of the dorsal extension part 14 is 20 to 80% of S. Especially, it is preferable that it is about 40 to 60% because it is excellent in the external appearance and a feeling of wearing of a hip part.

The dorsal body portion 13 can be conceptually divided into an upper end portion (waist portion) W and a lower portion U lower than this in the vertical direction, and the range thereof varies depending on the size of the product. The vertical length of W) may be 15 to 80 mm, and the vertical length of the lower portion U may be 35 to 220 mm.

In the upper end portion (waist portion) W of the dorsal body portion 13, the plurality of dorsal waist elastic elastic members 17 are spaced in the vertical direction so as to be continuous over the entire width direction, and at a predetermined elongation rate. It is fixed in the state extended along the width direction. Moreover, one or more arranged in the area | region adjacent to the lower part U of the dorsal main-body part 13 among the dorsal waist elastic-stretch members 17 may overlap with the absorbent core 20, Except the width direction center part which overlaps with the absorptive main body 20, you may provide in the width direction both sides, respectively. The dorsal waist elastic members 17 have a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (for synthetic rubber, in the case of natural rubber, in the case of natural rubber, in the area of 0.05 to 1.5 mm ² , especially in the range of 0.1 to 1.0 mm ² ). It is preferable to fix the yarn 3 to 22 pieces at intervals of 4 to 12 mm, respectively, at an elongation rate of 150 to 400%, particularly about 220 to 320%. In addition, the dorsal waist elastic stretch members 17 do not all have to have the same thickness and elongation rate. For example, the thickness and elongation rate of the elastic stretch members may be different at upper and lower portions of the dorsal waist portion. The dorsal waist elastic elastic members 17 can be freely determined with respect to the first and second elastic elongated elastic members 15 and 16, regardless of their thickness or elongation.

Moreover, in the lower part U of the dorsal main body part 13, except for the width direction center part which overlaps with the absorptive main body 20, several parts of the upper part and the width direction both sides continue so that it may continue over the width direction whole. The first elongated elastic elastic members 15 are fixed in a state in which they are elongated along the width direction at a predetermined elongation rate and spaced apart in the vertical direction.

As the first elongated elastic elastic member 15, the thickness is 155 to 1880 dtex, especially about 470 to 1240 dtex (for synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially 0.1 to 1.0 mm ^2). It is preferable to fix about 5 to 30 yarns at intervals of 1 to 15 mm, especially 3 to 8 mm, and an elongation rate of 200 to 350%, particularly 240 to 300%, respectively.

Moreover, in the back extension part 14, except for the width direction center part which overlaps with the absorptive main body 20, in each part of the width direction both sides, over the whole width direction (at least the hip part cover part 14C whole) The plurality of second elongated elastic members 16 are fixed in a state in which they are elongated along the width direction at a predetermined elongation rate and spaced apart in the vertical direction.

As the second elongated elastic elastic member 16, the thickness is 155 to 1880 dtex, especially about 470 to 1240 dtex (for synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially 0.1 to 1.0 mm ^2). Thread) at 5 to 40 mm, especially 5 to 30 mm, more preferably at 5 to 20 mm intervals, 2 to 10, elongation of 150 to 300%, especially 180 to 260% It is preferable.

On the other hand, the back exterior sheet 12F is composed of only the back main body portion (parts occupying the same upper and lower range as that of the junction portion 12A) basically the same as the dorsal body portion 13 of the dorsal exterior sheet 12B, and the body circumferential direction A rectangular shape is arranged along the line, and does not have a dorsal extension 14 such as the dorsal exterior sheet 12B.

That is, a plurality of belly waist portions are elastically arranged so as to be continuous over the entire width direction of the upper end portion (waist portion) W and the lower portion U of the belly exterior sheet (dorsal body portion) 12F. The expansion and contraction members 18 are fixed in a state in which they are spaced in the vertical direction and extended along the width direction at a predetermined elongation rate. The back waist elastic expansion and contraction member 18 preferably has the number, thickness, elongation rate, spacing, and vertical direction arrangement as close as possible to the dorsal waist elastic expansion and contraction member 17, but may be different. If different, the number of differences is 10 or less, preferably 5 or less, the difference in thickness is 1880 dtex or less, preferably 470 dtex or less, and the difference in elongation is 100% or less, preferably 40% or less The difference of is 10 mm or less, preferably 5 mm or less.

In addition, in the lower part U of the back exterior sheet 12F (dorsal body part), except for the width direction center part which overlaps with the absorptive main body 20, it is continuous over the whole width direction to each site | part of the upper side and the width direction both sides. The plurality of third elongated elastic members 19 are fixed in a state in which they are extended along the width direction at a predetermined elongation rate and spaced apart in the vertical direction. Although the up-down direction arrangement | positioning range of the 3rd elongate elastic stretchable member 19 may be part of a lower side part, it is preferable to set it as substantially whole (range to which an elastic force acts on the whole).

As the third elongated elastic stretchable member 19, it is preferable to make the number, thickness, elongation rate, spacing, and up-down arrangement as close as possible to the first elongate elastic stretchable member 15, but it may be different. If possible, the difference in number is 10 or less, preferably 5 or less, the difference in thickness is 1880 dtex or less, preferably 470 dtex or less, and the difference in elongation is 100% or less, preferably 40%. Hereinafter, the difference in spacing is 10 mm or less, preferably 5 mm or less.

Although the back exterior sheet 12F of the figure form shall consist only of the part which occupies the up-down direction range similar to the junction part 12A, the back main body part which occupies the same up-down direction range as 12 A of junction parts similarly to the back side, and this belly main body It can also be set as the structure which consists of a belly extension part extended below a part. Thereby, the shape of the leg circumference of the back exterior sheet 12F can be made into the shape which fits along an inguinal part.

In this case, it is preferable that it is 10 to 80% of the area of a back extension part, and if it is 20 to 50%, it is more preferable. An excessively large ventral extension is not preferable because it impairs fit.

On the other hand, as shown in the drawing, the elastic stretching members 15, 16 and 19 of the first, second and third elongated shapes are respectively provided on both sides of the width direction except for the width center portion overlapping with the absorbent body 20. If the interior and exterior sheets are hard to come off, it is preferable, but in this form, in addition to the form in which elastic elastic members exist only on both sides in the width direction, the other side from the width direction on one side across the absorbent body 20. The elastic stretching member exists until now, but the elastic stretching member is cut at the center portion in the width direction overlapping with the absorbent body 20 so that the elastic stretching member is not acted on (it is substantially the same as not providing the elastic stretching member). Form is also included. Moreover, a part of the 1st, 2nd and 3rd elongate elastic elastic members 15, 16, and 19 so that the elastic force acts over the whole width direction of the dorsal main body 13 and the dorsal extension 14 Or all may be provided across the absorptive main body 20 from the one side to the other side in the width direction.

(Built-in body)

The interior 20 can take any shape, but in the form of an illustration is rectangular. As shown in FIG. 3, the interior 20 is provided with the surface sheet 30 which becomes a body side, the liquid impermeable sheet 70, and the absorbing element 50 interposed therebetween. On the back side of the liquid-impermeable sheet 70, the groin portion exterior is covered so as to cover the entire rear surface of the interior 20 or the entire portion exposed between the back exterior sheet 12F and the back exterior sheet 12B. The sheet 12M can also be fixed. In addition, an intermediate sheet (second sheet) 40 may be provided between the surface sheet 30 and the absorbent element 50 in order to quickly transfer the liquid that has passed through the surface sheet 30 to the absorbent element 50. have. In addition, barrier cuffs 60 and 61 standing on the body side can be provided on both sides of the interior 20 in order to prevent excretion from leaking on both sides of the absorbent portion 20. In addition, although not shown in figure, each structural member of the interior body 20 can be mutually fixed with beta, bead, spiral application, etc., such as a hot melt adhesive suitably. In addition, the interior 20 may be attached to the exterior sheet 20 in a detachable manner using a mechanical fastener or an adhesive.

In addition, in the vicinity of the intersection of the widthwise both sides of the interior 20, in particular, the widthwise both sides of the interior 20 and the bottom edge of the dorsal exterior sheet 12F, and the lower edge of the dorsal exterior sheet 12B. In the vicinity of the intersection point, if the rigidity (strength) of the interior 20 is 15 to 50 cN / 50 mm, preferably 20 to 35 cN / 50 mm, the overall standing shape of the barrier cuffs 60 and 61 to be described later will be described. Since this becomes more stable, the effect is further added. On the other hand, for other portions, for example, the middle portion in the width direction, it is preferable to lower the rigidity to 5 to 35 cN / 50 mm, preferably 10 to 25 cN / 50 mm in consideration of flexibility. Moreover, the range which raises rigidity is the range of 5-30 mm from the width direction both edges of the interior body 20 to the center side in the width direction, and the interior body 20 and the back exterior sheet 12F in the front-back direction. It is preferable to set it as 50 mm or less (the part which overlaps with the fastening part 56N of the absorbent core 56) is respectively 50 mm from the intersection of the back exterior sheet 12B.

(Strength test)

Stiffness (strength) is measured by the following method based on JISK7171 (test method of plastic shock bending rigidity). For the measurement, the Tensiron tester (curvature radius R1 = 5.0 ± 0.1 mm at the end of the indenter, curvature radius R2 = 5.0 ± 0.2 mm at the end of the support plate) was used to warp in the front and rear direction of the product of the interior body 20. Measure the stiffness The test piece is produced by removing the elastic elastic member that affects the measurement from the interior 20 and cutting this into a rectangular shape having a diaper 80 mm in the diaper direction and 50 mm in the diaper width direction. 50 mm in the unit of the bending stiffness value is the length of the short side of the test piece, and the width of the test piece bent by the indenter during the test. The above test pieces are placed on a pair of support plates, each having a circular arc-shaped end portion and having a distance of 50 mm between the both ends (top), and arranged in parallel with each other and with the height positions of both ends. The long direction is placed in the direction orthogonal to each plate, and the indenter terminal part is disposed so as to slightly contact the test piece. A load deflection curve is obtained by lowering the indenter under the condition of a load cell of 5 kg (range 196 cN) and a speed of 30 mm / min. The maximum value of the obtained bending stress is made into bending rigidity value (cN / 50mm). In addition, when the site | part to be measured is smaller than the said sampling dimension, it measures by the test piece of a small scale, and converts by proportional calculation based on a dimension ratio.

(Surface sheet)

The surface sheet 30 has the property of permeating a liquid. Therefore, the material of the surface sheet 30 should just express this liquid permeability, for example, a non-porous nonporous fabric, a porous plastic sheet, etc. can be illustrated. Moreover, among these, a nonwoven fabric is not specifically limited what the raw material fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, regenerated fibers such as rayon and cupra, natural fibers such as cotton, and the like, and two or more kinds thereof may be used. Mixed fibers, composite fibers, etc. can be illustrated. In addition, the nonwoven fabric may be manufactured by any processing. As a processing method, a well-known method, for example, a span lace method, a span bond method, a thermal bond method, a melt-bronze method, a needle punch method, an air through method, a point bond method, etc. can be illustrated. For example, if the flexibility and decorative wrinkles are required, the span bond method and the span lace method are the preferred processing methods if the span bond method and the span lace method require the bulkiness and the softness.

Moreover, the surface sheet 30 may consist of one sheet, or may consist of the laminated sheet obtained by bonding two or more sheets. Similarly, the surface sheet 30 may consist of one sheet with respect to a plane direction, or may consist of two or more sheets.

In the case where the barrier cuffs 60 and 61 are provided, both sides of the surface sheet 30 return to the rear side of the absorbent element 50 through the liquid impermeable sheet 70 and the barrier cuffs 60 and 61, In order to prevent penetration of the liquid, it is preferable to adhere the liquid-impermeable sheet 70 and the barrier cuffs 60 and 61 with a hot melt adhesive or the like. Thereby, the effect that the rigidity of both sides of the interior 20 is improved can also be acquired.

(Middle seat)

In order to move the liquid which permeate | transmitted the surface sheet 30 to an absorbent core quickly, the intermediate sheet 40 called a "second sheet" which is quicker than the surface sheet 30 can be provided. The intermediate sheet 40 quickly transfers the liquid to the absorbent core to increase the absorbent performance by the absorbent core, and also prevents the "backflow" phenomenon from the absorbent core of the absorbed liquid, thereby preventing the liquid from being absorbed onto the surface sheet 30. It can always be dry. The intermediate sheet 40 may be omitted.

As the intermediate sheet 40, the same material as that of the surface sheet 30, or span lace, span bond, SMS, pulp nonwoven fabric, a mixed sheet of pulp and rayon, point bond or crepe paper can be exemplified. In particular, the air through nonwoven fabric is preferable because of its large volume. It is preferable to use a core-sheath composite fiber for the air-through nonwoven fabric, and in this case, the resin used for the core is preferably polypropylene (PP), but high rigid polyester (PET) is preferable. . Nuneorim amount of 20 ~ 80 g / m ² are preferred, and more preferably 25 ~ 60 g / m ^2. It is preferable that the thickness of the raw material fiber of a nonwoven fabric is 2.2-10 dtex. In order to make a nonwoven fabric bulky, it is also preferable to use all or one part of raw material fiber as a mixed fiber, and to use eccentric fiber, a hollow fiber, an eccentric, and a hollow fiber which do not have a core in the center.

Although the intermediate sheet 40 of the form of illustration is arrange | positioned shorter than the width | variety of the absorbent core 56, you may provide over the whole width. The longitudinal direction of the intermediate sheet 40 may be the same as the length of the absorbent core 56, or may be within a short length range centering on the region that receives the liquid. If the intermediate sheet 40 is turned from the widthwise side portion to the back surface side of the absorbent core 56 and is adhesively fixed with a hot melt adhesive or the like, the rigidity of both side portions of the interior body 20 is improved. A representative material of the intermediate sheet 40 is a nonwoven fabric having excellent liquid permeability.

(Liquid impermeable sheet)

The material of the liquid impermeable sheet 70 is not particularly limited, but is substantially impermeable through an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric in which a nonwoven fabric is laminated on a polyethylene sheet, or a waterproof film. Non-woven fabric (in this case, a liquid-impermeable sheet is comprised from a waterproof film and a nonwoven fabric) can be illustrated. Of course, in addition, the material which has the impermeable liquid and water vapor permeability currently used favorably from the viewpoint of stain prevention can also be illustrated. As the sheet of a material having water impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is molded and then stretched in the uniaxial or biaxial direction. (Micro) porous sheet can be illustrated. In addition, liquid non-woven fabric is used without using a waterproof film by a method such as non-woven fabric using microdenyl fiber, heat-reinforced reinforcement by applying heat or pressure to reduce the voids of the fiber, superabsorbent resin or coating of hydrophobic resin or water repellent agent. The permeable sheet can also be used as the liquid impermeable sheet 70.

The liquid-impermeable sheet 70 preferably has both sides of the absorbent element 50 turned up so as to line up to both sides of the side surface of the surface sheet 30 of the absorbent element 50 in order to increase the leakage resistance. Thereby, the effect of improving the rigidity of both side parts of the interior 20 can also be obtained. As for the width | variety of this extending | stretching part, about 5-20 mm respectively is suitable.

In addition, the inner surface or the outer surface of the liquid-impermeable sheet 70 may be designed by printing or coloring. Moreover, you may attach the design sheet which performed printing or coloring of the member separately from the crotch part exterior sheet 12M to the outer side of the liquid impermeable sheet 70. FIG. In addition, an excretion indicator 80 whose color changes due to absorption of the liquid powder can be provided inside the liquid impermeable sheet 70.

(Absorption element)

The absorbent element 50 has an absorbent core 56 and a foreskin 58 covering at least the rear and side surfaces of the absorbent core 56. The foreskin sheet 58 may be omitted.

(Absorption core)

The absorbent core 56 can be formed from an aggregate of fibers. In addition to integrating short fibers such as cotton pulp and synthetic fibers as the fiber aggregate, a filament aggregate obtained by opening a tow (fiber bundle) of synthetic fibers such as cellulose acetate may be used as necessary. The amount of fiber shingling can be, for example, about 100 to 300 g / m ² when integrating cotton pulp or short fibers, and about 30 to 120 g / m ² for filament aggregates. . The fineness in the case of synthetic fibers is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament aggregate, a filament may be a non-crimped fiber, but it is preferable that it is a crimped fiber. The crimp of the crimped fiber can be, for example, about 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. Moreover, the crimped fiber crimped uniformly is often used. In the absorbent core 56, it is preferable to hold and hold the superabsorbent polymer particles.

(Super Absorbent Polymer Particles)

The superabsorbent polymer particles include "powder" in addition to "particles." The particle diameter of the superabsorbent polymer particles can be used as it is used for this kind of absorbent article as it is, preferably 1000 μm or less, particularly 150 to 400 μm. Although it can use without a restriction | limiting in particular as a material of a superabsorbent polymer particle, the thing of 40 g / g or more of water absorption is very suitable. Examples of the superabsorbent polymer particles include starch, cellulose, and synthetic polymers, including starch acrylic acid (salt) graft copolymers, saponified starch acrylonitrile copolymers, crosslinked products of sodium carboxymethyl cellulose, and acrylic acid ( Salt) polymers and the like can be used. As the shape of the superabsorbent polymer particles, the ones generally used in the form of granules are very suitable, but other shapes can also be used.

As a super absorbent polymer, what integrated with an antimicrobial substance can be used. In particular, the zeolite particles (hereinafter referred to as 'antibacterial deodorizing zeolites') obtained by substituting some or all of the ion exchangeable ions in the zeolite with silver ions are contained in the superabsorbent polymer, or the antibacterial deodorizing zeolite particles Antimicrobial deodorant superabsorbent polymer particles, which are formed by adhering static electricity to the surface of superabsorbent polymer particles, are very suitable.

As the superabsorbent polymer particles, those having an absorption rate of 40 seconds or less are suitably used. When the absorption rate exceeds 40 seconds, so-called backflow, in which the liquid supplied into the absorption core 56 is returned to the outside of the absorption core 56, is likely to occur.

As the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are suitably used. Thereby, even if it is set as the bulky absorbent core 56, stickiness after liquid absorption can be suppressed effectively.

The eyelid amount of the super absorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorbent core 56. Therefore, although it cannot say collectively, it can be set as 50-350 g / m <^2> . If the amount of eyeballing of the polymer is less than 50 g / m ² , it is difficult to secure an absorption amount. Above 350 g / m ² , the effect is saturated.

If necessary, the superabsorbent polymer particles can adjust the spreading density or spreading amount in the planar direction of the absorbent core 56. For example, the application amount of the liquid excretion can be increased more than that of other parts. When considering gender differences, men can increase the front spreading density (quantity) and women can increase the central spray density (amount). Further, a portion where the polymer does not exist locally in the planar direction of the absorbent core 56 (for example, in the form of spots) may be provided.

(Foreskin Sheet)

In the case of using the foreskin sheet 58, a tissue paper such as a crepe paper, a nonwoven fabric, a polyramid nonwoven fabric, a sheet with a small opening, or the like can be used. However, it is preferable that it is a sheet which does not escape super absorbent polymer particles. When using a nonwoven fabric instead of crepe paper, a hydrophilic SMMS (spanbond / meltbron / meltbron / spanbond) nonwoven fabric is particularly suitable, and the material may be polypropylene, polyethylene / polypropylene, or the like. The amount of snow is preferably 5 to 40 g / m ² , in particular 10 to 30 g / m ² .

As shown in FIG. 2, the foreskin sheet 58 may cover only the back surface and the side surface of the layer, in addition to the form surrounding the entire absorbent core 56. Although not shown, only the top and side surfaces of the absorbent core 56 are covered with crepe paper or a nonwoven fabric, and the bottom surface is covered with a liquid impermeable sheet such as polyethylene, and the top surface of the absorbent core 56 is covered with a crepe paper or nonwoven fabric, and the side and bottom surfaces thereof are covered. May be covered with a liquid-impermeable sheet such as polyethylene (these materials are components of the foreskin sheet). If necessary, the absorbent core 56 may be sandwiched between two upper and lower sheets and disposed only on the lower surface. However, the absorbent core 56 is not preferable because it is difficult to prevent the movement of the superabsorbent polymer particles.

(Inguinal exterior sheet)

On the back side of the interior 20, the crotch portion exterior sheet 12M exposed to the product outer surface is provided. As the material of the inguinal exterior sheet 12M, the same ones as the back exterior sheet 12F and the back exterior sheet 12B can be used, but the back exterior sheet 12F, such as containing a higher strength material and a deodorant, may be used. ) And the back exterior sheet 12B may be used. Specifically, various nonwoven fabrics such as a spunbond nonwoven fabric, a melt bronze nonwoven fabric, a point bond nonwoven fabric, an air through nonwoven fabric, an airpoint nonwoven fabric, a spanlace nonwoven fabric, an SMS nonwoven fabric made of fibers such as PP, PP / PE, PP / PET, or The thing which added deodorant etc. to this can be used.

The groin portion exterior sheet 12M is subjected to high body pressure when sitting. Therefore, the material which has a characteristic with high friction fastness (it does not fluff) is preferable, and it is preferable to use what the evaluation of "(circle)" or "(circle)" is obtained especially in the following friction fastness test.

Specifically, the thickness of the fibers is preferably 1.1 to 5.5 dtex. Spunbond bonded to the fibers by thermal embossing, SMS, point bonds, and air through nonwoven fabrics bonded to the fibers by hot air are very suitable. When used, since the adhesion between fibers is strong, evaluation of "(circle)" or "(circle)" is usually obtained. On the other hand, the melt-broken nonwoven fabric with which a constituent fiber is thin, and the spunlace nonwoven fabric with which fibers do not adhere | attach are often evaluated as "(triangle | delta)" or "x". In order to suppress the fluffing of a nonwoven fabric, what is necessary is just to press a surface, to raise the temperature and pressure of a hot emboss, or to raise the temperature of a hot air with a smooth press roll in a manufacturing process of a nonwoven fabric.

(Friction fastness test)

Friction fastness is measured by the following method based on JISL0849. That is, the sheet piece for friction fastness measurement of 250 mm x 25 mm is created, and the friction fastness of the outer surface side (outer surface side of a built-in body) of the sheet sheet for measurement is measured. For example, COLOR FASTNESS RUBBING TESTER (manufactured by Tester Industry Co., Ltd .; model AB-301) can be used for the measurement of the friction fastness. The measurement is performed using a friction tester type II and subjected to 50 vibrations. The sheet piece for measurement obtained as a result of the test is visually compared with the limit sample, {◎: no crumbs and fluffs occur, ○: no crumbs, fluffs occur, △: with crumbs, fluffs occur, ×: nonwoven fabric breaks} Evaluate in 4 steps.

The crotch portion exterior sheet 12M may be a sheet provided with design elements by printing or coloring. When using together with the above-mentioned design sheet, it is preferable to arrange | position so that each design may not overlap.

It is preferable to use a stretchable nonwoven fabric as the groin portion exterior sheet 12M, and to stretch the gluing nonwoven fabric in the longitudinal direction of the interior 20 to improve the fit of the groin portion.

If the groin portion exterior sheet 12M enters from the widthwise side to the body side and is adhesively fixed to the outer surface of the barrier sheet 62 by a hot melt adhesive or the like, the rigidity of both side portions of the interior 20 is improved. In this form, it is preferable to use a sheet with high strength for the groin portion exterior sheet 12M. Specifically, the sum of the MD direction and the CD direction of the sheet of the lecture measured by the clock method (JISL1096C method) may be 100 mm or more, preferably 150 mm or more.

In the illustrated example, at the portion where the dorsal and dorsal exterior sheets 12F, 12B and the interior 20 overlap, the groin section exterior sheet 12M is formed with the interior 20 and the dorsal and dorsal exterior sheets 12F, 12B. Although sandwiched between, it is also possible to stick to the outside of the dorsal and dorsal exterior sheets 12F, 12B. The crotch portion exterior sheet 12M can be attached to the back surface of the interior 20 and the inner or outer surface of the dorsal and dorsal exterior sheets 12F, 12B by a hot melt adhesive or the like.

(Barrier cufflinks)

The barrier cuffs 60 and 61 are strip-shaped members arranged along both sides of the interior 20 in the front and rear directions, and block urine or thin stools moving laterally over the surface sheet 30. It is installed to prevent leakage to the side.

In this embodiment, as shown in FIG. 3 and FIG. 4, barrier cuffs 60 and 61 are provided in double on each of the left and right sides of the interior 20. In the state where the diaper is deployed, as shown in the figure, the inner barrier cuff 61 stands up obliquely from the side of the interior 20 to the widthwise center side, and the outer barrier cuff 60 is the inner barrier cuff 61. It is provided to stand up from the side of the viscera 20 in the width direction outer side of, the side of the die side stands up obliquely toward the width direction center side, and the part of the end side from the middle part stands up obliquely toward the width direction outer side. It is. In addition, unlike the illustrated form, only one of the outer and inner barrier cuffs 60 and 61 may be provided.

More specifically, the inner barrier cuff 61 folds the band-shaped barrier sheet 62 having the same length as the front-rear length of the interior body 20 in the width direction, folds it back to two, and overlaps it. A plurality of thin and elongated elastic elastic members 63 are fixed at intervals in the width direction in the elongated state along the long direction between the bent portion and the sheets in the vicinity thereof. The elongated and elastic elastic member 63 is not fixed to the barrier sheet 62 at the front and rear ends, but is fixed at the intermediate portion so that the barrier cuff is stretched back and forth. The barrier sheet 62 is a flexible non-woven fabric having excellent uniformity and concealability, such as a spunbond nonwoven fabric (SS, SSS, etc.), an SMS nonwoven fabric (SMS, SSMMS, etc.), a melt blown nonwoven fabric, and the like. A water-repellent nonwoven fabric or the like to which the treatment has been applied can be used suitably, and the amount of fiber snow is preferably about 10 to 30 g / m ² . As the elongated elastic stretchable member 63, real rubber or the like can be used. When using spandex yarn, the thickness is preferably 420 to 1120 dtex, and more preferably 620 to 940 dtex. 150-350% is preferable and, as for the elongation rate at the time of fixing, 200-300% is more preferable. In addition, although not shown in figure, the waterproofing film is interposed between the barrier sheets 62 which were folded in two, and the overlapping part of the barrier sheets 62 which were folded in two is overlapped by the beta coating (slot coat) of a hot melt adhesive agent. It is also possible to prevent the liquid from oozing out by joining. In this case, it is preferable that the application amount of a hot melt adhesive shall be 5 g / m <^2> or more. In addition, the barrier cuff (laminated body) has a ventilation degree of 50 cc / cm ² · sec or more, in particular 100 cc / cm ² · sec, measured according to JIS L 1096 so that the excrement stored in the barrier cuff is not visible. As mentioned above, it is preferable that the opacity measured according to JIS P 8138 is 40% or more, especially 50% or more, and it is comprised so that the water pressure measured according to JIS L 1192A method may be 150 mmH ₂ O or more, especially 200 mmH ₂ O or more. .

It is preferable to arrange | position one or two elastic elongate-stretch members 63 of an elongate shape in the terminal part of the inner barrier cuff 61, and if it arrange | positions one or two in the middle part between a terminal part and a base part, desirable. If there is an elongated elastic elastic member 63 having an elongated shape in the middle portion, the elastic stretchable member 63 is used as a point so that the skin easily comes into contact with the skin in the range from the middle portion to the end portion. As for the arrangement position of the elongate elastic stretchable member 63 of an intermediate part, 30 to 70% of range of the height (width direction length of a protrusion part) of the inner barrier cuff 61 is preferable. In the infant diaper, since the height of the inner barrier cuff 61 is preferably about 15 to 35 mm, the arrangement range of the elongated elastic elastic member 63 is preferably 5 to 25 mm from the end to the proximal side. The position of 12-18 mm is more preferable. In the case where the elongated elastic members 63 are elongated in parallel at the ends and / or the middle portions of the inner barrier cuff 61, the arrangement interval 61d is preferably 2 to 10 mm. ˜6 mm is more preferred.

The end portion of the inner barrier cuff 61, which is folded back in the width direction, is opposite to the attachment portion (inside attachment portion) 65 fixed to a range from the surface of the side of the interior 20 to the back surface. The parts other than this attachment part 65 become the protrusion part 66 (the part on the side of the bending part, and correspond to an inner protrusion part) which protrudes from the attachment part 65, and this protrusion part 66 ), Both front and rear ends are fixed to the surface of the surface sheet 30 by a front and rear fixing part 67 by a hot melt adhesive or a heat seal, and the front and rear middle parts become an unfixed free part (inner free part). The elongated elastic member 63 is fixed in the elongated state along the front-back direction.

The outer barrier cuff 60 also has the same structure as the inner barrier cuff 61, but the attachment portion (outer attachment portion) 68 has an inner barrier cuff 61 on the rear side of the interior body 20. The fixed portion is fixed to the outer surface of the inner barrier cuff 61 at the widthwise center side of the attachment portion 65, and both front and rear ends of the protrusion portions (outer protrusion portions) 69 are formed from the attachment portion 68 from the interior portion ( A side of the bamboo side lined up to the surfaces of the front and rear ends of the inner protrusion 66 in the inner barrier cuff 61 and fixed to the surfaces of the front and rear ends of the inner protrusion 66 through the side of 20; And a point consisting of a terminal side portion which is folded in the width direction outward from the end of the die-side portion, and fixed to the base portion, and the arrangement and number of the elongated and elastic elastic members 63 are different.

However, also with respect to the inner barrier cuff 61, a structure in which the end of the inner protruding portion is folded back outward in the width direction, specifically, 1/2 or less of the height (width in the width direction of the protruding portion) of the inner barrier cuff 61. Preferably, if it is 1/3 or less, the structure in which the last side part is bent back to the width direction outer side and fixed to the die | dye side part similarly to the outer barrier cuff 61 may be employ | adopted.

2-6 pieces are preferable, and, as for the number of the elongate elastic elastic members 63 of the elongate shape provided in the free part (outer free part) of the outer barrier cuff 60, 3-5 pieces are more preferable. The arrangement interval 60d is suitably 3 to 10 mm. If comprised in this way, it will be easy to touch a surface with respect to skin in the range which arrange | positioned the elongate elastic elastic member 63. The elongate elastic members 63 may be arranged not only at the far end but also at the die side. Although the thickness and the elongation rate of the elongated and elastic elastic member 63 of the elongated shape disposed on the outer barrier cuff 60 are in accordance with the inner barrier cuff 61, the thickness is the same as or larger than that of the inner barrier cuff 61. The elongation rate is preferably equal to or lower than that of the inner barrier cuff 61.

The front and rear lengths of the front and rear fixing portions 67 of the protruding portions 66 and 69 are preferably formed on the inner barrier cuff 61 side with or shorter than the outer barrier cuff 60. It is preferable that the front and rear fixed lengths of the elongated and elastic elastic members 63 having the elongated shape in 60 and 61 be the same as or longer than the outer barrier cuff 60. The boundary between the attachment portion 65 and the protruding portion 66 may be the same position at the outer barrier cuff 60 and the inner barrier cuff 61, but the boundary of the outer barrier cuff 60 is the inner barrier cuff 61. It is preferable to be spaced apart from the boundary in the width direction to the center side, and the separation distance is preferably within 10 mm.

On the edges of the protruding portions 66 and 69 at the attachment portions 68 and 65 of the outer barrier cuff 60 and the inner barrier cuff 61, a linear die fixing portion is formed by hot melt adhesive or heat seal. It is desirable to. Moreover, the other fixing part can be fixed in a suitable pattern using a hot melt adhesive etc. It is preferable that the linear die-fastening part in the inner side attaching part 65 is located to 3-20 mm, especially 5-10 mm from the side edge of the surface side of the interior 20 to the width direction center side. Moreover, it is preferable to arrange | position so that the linear die-fixed part in the inner side attachment part 65 may terminate the barrier cuff 61 and the fastening part 50N. Moreover, it is preferable that the linear die-fastening part in the outer side attachment part 68 is located to 5-30 mm, especially 10-20 mm from the side edge of the back surface side of the interior 20 to the width direction center side. In this case, since only the front and rear end portions of the barrier cuff are folded and fixed to the surface side, the outside of the groin portion in which the restriction to the width direction center side by the front and rear fixing portion 67 does not sufficiently work is performed. Both the barrier cuff 60 and the inner barrier cuff 61 stand up in the width direction outward, and the pocket formed by the inner barrier cuff 61 is widened. Moreover, when the arrangement | positioning dimension of the die | dye fixing part of the outer barrier cuff 60 and the inner barrier cuff 61 is out of the said range, the internal body to which the attachment part 65 of the inner barrier cuff 61 is fixed, for example ( If the width W7 of the surface side portion of 20) is too short, the standing heights of both side portions of the interior 20 between the inner and outer barrier cuffs 61 and 60 are lowered, which is not preferable. If it is too long, the inner barrier cuff 61 is not preferable because the width of the portion used for absorption in the surface sheet 30 is narrowed. However, in the outer barrier cuff 60, it is formed on the back side of the interior 20. Since there is an advantage that the pocket is widened, it may be 30 mm or more as long as it does not impair the stability of the standing.

In some cases, the linear die-fastening portion in the inner side attachment portion 65 is in the vicinity of the side of the surface side of the interior 20 (specifically 0 to 5 mm in the width direction from the side edge, preferably 0). Position of 3 mm) or on the back side. On the surface side, when the die-shaped fixing part of the linear shape is extended beyond 5 mm in the width direction from the side edge, the barrier cuff stands up toward the center side in the width direction even in the groin part, and the pocket formed by the inner barrier cuff 61 becomes narrow. Therefore, it is not preferable. When located in the back surface side, although the position of 0-20 mm is suitable from the side edge of the interior body 20, you may be located over 20 mm.

The fixing objects of the attachment portions 68 and 65 of the outer and inner barrier cuffs 60 and 61 are suitable members such as the surface sheet 30, the liquid impermeable sheet 70, and the absorbent element 50 in the interior 20. In addition, the other barrier cuff can be fixed with respect to the interior 20 through either one of the barrier cuffs.

In the outer and inner barrier cuffs 60 and 61 configured in this manner, the contracting force of the elongated elastic elastic member 63 acts to approach both front and rear ends, but both front and rear ends of the protruding portions 66 and 69 stand up. In contrast to being fixed, the free portion is held between them, so that only the free portion stands on the body side as shown in FIG. In particular, in the outer barrier cuff 60 in which the attachment portions 68 and 65 are located on the rear surface side of the interior 20, the outer barrier cuff 60 stands so as to open outward in the width direction from the groin portion and the vicinity thereof. ) Touches the surface around the leg. On the other hand, since the front and rear sides (dorsal portion and the back portion) of the groin portion are regulated so that the outer and inner barrier cuffs 60, 61 are not opened outward in the width direction by the front and rear fixing portion 67, the inner barrier cuff 61 Since the standing up high and the lower half of the outer barrier cuff 60 stand up likewise, leakage from both sides of the viscera 20 in the belly and the back can be reliably prevented. The front and rear fixing portions 67 of the protruding portions 66 of the inner barrier cuff 61 are not folded back, and the front and rear fixing portions 67 of the protruding portions 68 of the outer barrier cuff 60 are not folded back. Since the sheet is folded back toward the outside, the free spaces of the outer and inner barrier cuffs 60 and 61 stand in a spaced apart state.

And, in particular, the inner attachment portion 65 of the inner barrier cuff 61 is located on both sides of the surface of the interior 20, and the inner attachment portion 65 and the inner protrusion 66 that are the starting point of standing up and Since the boundary of is spaced apart from the side edge of the internal body 20 in the width direction center side, the outer and inner barrier cuff 60 by the contracting force of the elastic member 63 of the outer and inner barrier cuff 60, 61 , 61 not only stands on the body side, but the side portion 20s of the width direction outer side stands on the body side than the inner protruding portion 66 in the internal body 20, and the side portion 20s of the internal body 20 is present. ) Serves as an intermediate barrier between the outer and inner barrier cuffs 60 and 61, and also serves as a spacer for keeping the outer and inner barrier cuffs 60 and 61 in a spaced apart state. As a result, the outer and inner barrier cuffs 60 and 61 stand at wide intervals without overlapping with each other, and each fits around the leg, thereby providing excellent leakage preventing properties.

Similar to the outer and inner barrier cuffs 60 and 61, by fixing the elongated elastic member along the side edge of the interior 20 in the extended state, both side portions 20s of the interior 20 are fixed to the far end. Although it is possible to stand as a third barrier cuff to form a fine wall (wrinkles) in the standing portion, it is more natural to use the standing action of the outer and inner barrier cuffs 60 and 61 without providing such an elastic member. It is preferable because it is easy to function as a spacer which makes the wall larger and the outer and inner barrier cuffs 60 and 61 do not overlap each other.

Although the dimensions of the barrier cuffs 60 and 61 can be appropriately determined, in the case of an infant diaper, for example, as shown in FIG. 7, the standing height of the inner barrier cuff 61 (protrusions 66 in the expanded state) is shown. The widthwise length W5 is preferably 10 to 50 mm, preferably 10 to 45 mm, in particular 15 to 35 mm, and the standing height of the outer barrier cuff 60 (protrusions 69 in a developed state). (W6) is preferably 15 to 60 mm, in particular 20 to 40 mm. Moreover, it is preferable that the clearance distance W4 between the terminals in the state which fell the inner barrier cuff 61 to the surface sheet 30 surface is 60-170 mm, especially 70-120 mm. In addition, the separation distance W3 between the innermost folds in the flat state of folding so that the outer barrier cuff 60 is parallel to the surface of the surface sheet 30 is 60 to 190 mm, especially 70 to 140 mm. It is preferable.

On the other hand, as described above, when the liquid-impermeable sheet 70 is turned from both sides of the absorbent element 50, the liquid-impermeable sheet 70 returns to both sides in the width direction of the absorbent element 50 to absorb the absorbent element 50. It is preferable to line up to the position corresponding to the boundary between the inner side attachment part 65 and the inner side protrusion part 66 at the side of the surface sheet 30 of the side face). Since a small amount of excrement exceeding the inner barrier cuff 61 can be prevented by both side portions 20s of the interior 20 lifted between the inner and outer barrier cuffs 61 and 60, as described in the present invention. By embedding the liquid-impermeable sheet 70 on the surface side of the internal body side portion 20s, it is possible to effectively prevent a small amount of excrement urine or thin stool water from spilling over the inner barrier cuff 61. In addition, since the liquid-impermeable sheet 70 used as the back side member of the interior body 20 is used, the increase in material cost is small and the complexity of the manufacturing process can be avoided.

Also, in this case, the width W5 of the inner protrusion 66 is wider than the width W7 of the surface side portion of the interior 20 in which the inner attachment portion 65 is fixed, and the outer protrusion 69 does not die. The sum of the width W8 of the portion located on the surface side of the interior 20 of the diaper in the expanded state of the diaper and the width W9 of the last portion of the outer protruding portion 69 are the inner attachment portions. The structure is wider than the width W7 of the surface side portion of the interior body 20 to which the 65 is fixed, and the liquid impermeable sheet 70 is not embedded in the inner barrier cuff 61 and the outer barrier cuff 60. It is more preferable to employ. In such a structure, it is only the side part 20s of the interior 20 which is low in height and low in ventilation by the intrinsic of the liquid impermeable sheet | seat 70, and it is high in height and obstructs ventilation. The inner and outer barrier cuffs 61 and 60 can maintain high ventilation. Therefore, it is possible to maintain high breathability without impairing the above-mentioned bleeding prevention effect.

6, the absorbent core 56 is located between the front end 56F, the rear end 56B, and between them, and the tightening portion having a narrower width than the front end 56F and the rear end 56B. (N), the front and rear lengths of the absorbent core front end portion 56F are set to L1, and the front and rear lengths at the overlapping portion of the absorbent core 56 and the back exterior sheet 12F are set to L2, and the absorbent core is set to L1. The front and rear length of the rear end 56B is L3, the front and rear length at the overlapping portion of the absorbent core 56 and the dorsal exterior sheet 12B is L4, and the minimum width of the tightening part 56N is W1. When the width of the absorbent core front end 56F and the width of the absorbent core back end 56B are set to W2, the following formulas (1) to (4) are preferable.

70 mm ≤ W1 <W2 ≤ 190mm. (One)

0.5 ≤ W1 / W2 ≤ 0.85 (2)

0 mm ≤ L1-L2 ≤ 70mm. (3)

0 mm ≤ L3-L4 ≤ 50mm. (4)

A more preferable range is as follows.

90 mm ≤ W1 ≤ 120mm. (One')

100 mm ≤ W2 ≤ 190mm. (One'')

0.6 ≤ W1 / W2 ≤ 0.75. (2')

30 mm <L1-L2 ≤ 60 mm. (3 ′)

5 mm <L3-L4 ≤ 30 mm. (4')

The reason for these conditions is as described above. If W1 and W2 are too narrow, the standing of the barrier cuff becomes unstable, and the improvement of the rigidity of the absorbent core becomes insufficient. If the width is too wide, the fit feeling is deteriorated by the deterioration of the fit. In addition, when the above-mentioned exterior sheets 12F and 12B consist only of the part which occupies the same up-down direction range as the junction part 12A, the interior 20 and exterior sheets 12F and 12B intersect substantially perpendicularly, and interior Since a large force concentrates on the adhesive part of the sieve 20 and the exterior sheets 12F and 12B, the numerical value of L1-L2 and L3-L4 becomes like this. Preferably it is 5 mm or more, More preferably, it is 10 mm or more. On the other hand, when the extension part 14 is provided below, L1-L2 and L3-L4 may be 0 mm or more as mentioned above.

In the groin portion, since there is no absorbent core 56 in the vicinity of the attachment portion 65 of the barrier cuffs 60 and 61, the degree of freedom of movement of the barrier cuffs 60 and 61 is increased. In addition, the barrier cuffs 60 and 61 are easily opened to the outside in the width direction, and are easily in contact with the skin to the surface, thereby improving the followability of the pit surface to the movement of the legs. In both front and rear sides, since the absorbent core 56 in the side of the interior 20 exists in a sufficient range, the barrier cuffs 60 and 61 are standing up with this as a starting point. The portion extending from the front and rear sides to the groin portion is a displacement portion in which the barrier cuffs 60 and 61 open from the posture standing in the width direction on the basis of both edges in the width direction of the interior 20 in the width direction. The posture change of the barrier cuffs 60 and 61 is held by the absorbent core 56 existing to the side of the interior 20 so that the overall standing shape of the barrier cuffs 60 and 61 is stabilized. If the tightening portion is out of the numerical range and the tightening portion is too large, the degree of freedom of the barrier cuffs 60 and 61 in the groin portion may become so high that a gap is likely to occur around the legs, and there is no origin point at both front and rear sides of the groin portion. Therefore, there is a fear that the standing of the barrier cuffs 60 and 61 becomes unstable. On the contrary, when the tightening portion is too small, the degree of freedom of the barrier cuffs 60 and 61 is lowered, which is not preferable.

Moreover, it is preferable that the absorbent core 56 is comprised so that especially following formula (6) and (7) may be satisfied.

90 mm ≤ L1 <L3 ≤ 180 mm. (6)

40 mm ≤ L2 <L4 ≤ 180 mm. (7)

In addition, the front-back direction length L7 of the whole clamping part 56N becomes like this. Preferably it is 80 mm or more, Especially preferably, it is 120-260 mm. If the front and rear length L7 of the tightening portion 56N is too short, the fitability about the leg decreases, and the absorbent core 56 obstructs the movement of the leg, and if too long, the rigidity of the absorbent core 56 is secured. It is difficult to do.

On the other hand, in order to improve the rigidity of both sides of the interior 20 in the vicinity of the lower edge of the back exterior sheet 12F and the back exterior sheet 12B, the outer and inner barrier cuffs 60, 61 are shown in FIG. The front and rear length L5 of the front fixing part 67 and the front and rear length L6 of the rear fixing part at the protruding portions 69 and 66 of the ss satisfies equations (4) and (5) below. It is desirable to ensure long.

L2 '<L5' ... (4)

L4 '<L6' ... (5)

With this configuration, the rigidity of both sides of the interior body 20 can be increased by using the fixing 67 by the adhesion or the like, which is required on the front part and the rear part for the barrier cuffs 60 and 61 to stand. It is easy to concentrate the force, and the rigidity of both sides of the interior 20 in the vicinity of the lower edge of the back exterior sheet 12F and the back exterior sheet 12B is improved.

Thus, deformation of the absorbent core 56 is further prevented. Although this relationship is preferably satisfied in any of the outer and inner barrier cuffs 60 and 61, either one may be satisfied. Moreover, it is more preferable if it is comprised so that following formula (4 ') and (5') may be satisfied.

5 mm <L5 <210 mm. (4')

5 mm <L6 <210 mm. (5 ′)

In addition, if the front and rear fixing part 67 is lined up to the fastening part 56N, and it overlaps with the fastening part 56N 0-10 mm, the lower edge edge vicinity of the back exterior sheet 12F and the back exterior sheet 12B is near. Although it is preferable to improve the rigidity of both sides of the interior 20 of the interior, the front and rear fixing portion 67 is not lined up to the tightening portion 56N when priority is given to stable standing of the barrier cuffs 60 and 61. desirable.

In addition, in the case of having the inner and outer barrier cuffs 61 and 60, the front and rear ends of the fasteners 50N are positioned on the groin side rather than the lower end of the trunk circumference, and the minimum width W1 of the fasteners 56N is 50 to 85%, more preferably 60 to 75% of the width of the absorbent core front end 56F and the width W2 of the absorbent core rear end 56B, and the inner attachment at each inner barrier cuff 61. If the boundary between the portion and the inner protruding portion is arranged so as to terminate the tightening portion 56N in the front-back direction, the inner barrier cuff 61 stands on the line terminating the tightening portion 50N. It is preferable because the fit to the surroundings is further improved.

Moreover, in order to further improve an effect, it is preferable to make the fiber density of the width direction both sides in each of the absorption core front end part 56F and the absorption core rear end part 56B higher than the fiber density of the width direction middle part. Specifically, it is preferable to make the thickness of the absorbent core 56 uniform, and to increase the basis weight of the fiber aggregates at both sides in the width direction at each of the absorbent core front end 56F and the absorbent core rear end 56B, In this case, the thickness of the absorbent core 56 is 1-15 mm, the basis weight in the range 56x of 5-30 mm from the width direction both side edge to the center side is 350-700 g / m <^2> , These both sides It is preferable to make the basis weight of the intermediate part 56m between parts into 300-600 g / m <^2> , and to make the basis weight of the width direction both sides 1.2-2.0 times with respect to the width direction intermediate part. In this case, the blending ratio of the super absorbent polymer in the absorbent core 56 is about 40 to 70%.

In addition, since the absorbent core 56 of this embodiment has the fastening part 56N, even if the whole said range in the width direction both sides of the absorbent core 56 is a high basis weight part, in the groin part of the interior 20, It does not affect the flexibility of the. Of course, the high basis weight portion is intermittently formed at both sides in the width direction of the absorbent core 56, and is formed intermittently near the intersection between the widthwise both edges of the absorbent core 56 and the lower edges of the exterior sheets 12F and 12B. You may be. In this case, it is preferable to form a high basis weight part over the range of about 10-80 mm, especially about 20-50 mm in the front-back direction.

(Industrial applicability)

The present invention can be applied to a pants type disposable diaper which is formed in a pants type in advance. Moreover, the barrier cuff of this invention does not have an exterior sheet in the at least both edges of a groin part like the pants type disposable diaper of the exterior 2 division type like the said example, or the pants type disposable diaper shown by patent document 2, The cuff (in the case of the outer barrier cuff in the double case) is very suitable for the structure forming the lateral edges of the groin. In this case, it is preferable that it is 1/4 or more of the whole length of a diaper, and, as for the area | region where an exterior sheet does not exist in the both edges in a groin part, it is more preferable that it is 1/3 or more. However, the barrier cuff of the present invention is not limited to this structure, and can be applied to other types of pants-type disposable diapers or tape-type disposable diapers.

* Explanation of symbols for the main parts of the drawings *
10... Internal Organ,
12... Exterior Sheet,
12 F... Belly exterior sheets,
12 B... Dorsal facing sheet,
13... Dorsal body,
14... Dorsal Extension,
15... A first elongate elastic member,
16... A second elongate elastic member,
20... Internal Organ,
56... Absorbent core,
56 F... Absorbent core shear,
56 B... Absorbent core rear end,
56 N... Fasteners.

Claims

It consists of a dorsal exterior sheet covering the dorsal side and a dorsal exterior sheet covering the dorsal side of the body circumference of the wearer, with the upper edge of the dorsal exterior sheet and the upper edge of the dorsal exterior sheet aligned, and the width of both sides of the dorsal exterior sheet in the width direction A cylindrical body circumference formed by joining the joints and the joints of the edges on both sides of the dorsal exterior sheet in the width direction,
The front end is connected to the inner surface of the central portion in the width direction of the dorsal exterior sheet, and the rear end is connected to the inner surface of the central portion in the width direction of the dorsal exterior sheet, and from the dorsal side to the belly through the groin. It has a built-in body covering the,
The interior body is provided with an absorbent core formed of a liquid-permeable surface sheet and a fiber assembly arranged on its outer surface side,
In the pants type disposable diaper in which the dorsal exterior sheet and the dorsal exterior sheet are not continuous at the groin side and are separated from each other,
The absorbent core is located between the front end, the rear end, and these, and has a narrow tightening part in comparison with the front end and the rear end,
The front and rear length of the front end portion of the absorbent core is L1, the front and rear length at the overlapping portion of the absorbent core and the rear facing sheet is L2, and the front and rear length of the rear end portion of the absorbent core is L3, and the absorption When the length in the front-rear direction at the overlapping portion of the core and the dorsal exterior sheet is L4, the minimum width of the tightening part is W1, the width of the front end of the absorbent core and the width of the rear end of the absorbent core are W2. Disposable diaper characterized in that it is configured to satisfy the same formula (1) to (3).
70 mm ≤ W1 <W2 ≤ 190 mm (One)
0 mm ≤ L1-L2 ≤ 70 mm. (2)
0 mm ≤ L3-L4 ≤ 50 mm. (3)

The method of claim 1,
In the visceral body, at least in the vicinity of the intersection between the widthwise both edges of the interior body and the lower edge of the belly exterior sheet and the intersection of the widthwise both edges of the interior body and the bottom edge of the dorsal exterior sheet, the rigidity is 15. Disposable diapers up to 50 cN / 50 mm.

The method of claim 1,
A band-shaped barrier cuff, which stands up on the body side, is provided on both sides in the width direction of the interior body from the front end to the rear end of the interior body along the front-rear direction.
The front part and the back part of the barrier cuff are fixed to the surface sheet in the overlapping state so that the front part and the rear part are not standing, while the middle part is unfixed and at least this middle part. The elastic elongate member of elongate shape is fixed to the part in the state extended along the front-back direction,
A disposable diaper configured to satisfy the following formulas (4) and (5) when the front and rear length of the front portion of the barrier cuff is L5 and the front and rear length of the rear portion of the barrier cuff is L6.
L2 <L5... (4)
L4 < L6... (5)

The method of claim 1,
The said absorbent core is a disposable diaper whose fiber density of the width direction both sides in each of the said absorbent core front end part and the absorbent core rear end part is higher than the fiber density of the width direction middle part.

The method of claim 1,
A band-shaped inner barrier cuff is provided along the widthwise both sides of the interior body in the front-rear direction, and at the same time, the band-shaped band is arranged in the front-rear direction along the width-wise side of the interior body outside the inner barrier cuffs. The outer barrier cuffs are provided respectively,
The inner barrier cuff is an inner attachment portion whose end portion on one side in the width direction is fixed with respect to the end portion in the width direction of the interior, and the portion other than the inner attachment portion protrudes from the inner attachment portion. A protruding portion, and both front and rear ends of the inner protruding portion are fixed to the surface of the surface sheet, and the front and rear middle portion is an unfixed inner free portion, and is elongated along the front and rear direction at least at the end of the inner free portion. The elastic member of the shape is fixed in the extended state,
The outer barrier cuff is an outer attachment portion whose end on one side in the width direction is fixed with respect to the back side portion at the end in the width direction of the interior, and portions other than the outer attachment portion protrude from the outer attachment portion. It becomes an outer protrusion part, The front-back both ends of this outer protrusion part line up from the outer side attachment part to the surface of the front-back direction both ends of the inner side protrusion part in the said inner barrier cuff through the side part of the said interior body, It consists of the bamboo side part fixed to the surface of both ends of the front-back direction of the protrusion part, and the back side part which is bent to the width direction outer side from the end of this bamboo side part, and is the terminal side part fixed to the said bamboo side part, and the middle part of the front-back direction is remarks It becomes a positive outer free part, and is thin along at least one terminal part of this outer free part along the front-back direction Pull-on type disposable diaper in a long-shaped elastic member is fixed in a stretched state.

The method of claim 1,
The said inner side attachment part is a disposable diaper fixed to the site | part which the edge part of the width direction one side of the said inner barrier cuff includes the surface side part in the width direction edge part of the said interior body.

The method of claim 6,
A disposable diaper, wherein the boundary between the inner attachment portion and the inner protrusion portion is disposed so as to terminate the tightening portion in the front-rear direction.

The method of claim 7, wherein
In the diaper development state, a boundary between the inner attachment portion and the inner protrusion portion is located at a portion of 3 to 20 mm from the side edge of the interior surface side to the width direction center side, and the outer attachment portion and the outer protrusion portion Disposable diapers having a boundary of 5 to 30 mm from the side edge of the interior body back side toward the width direction center side.

The method of claim 8,
In the interior, the outer surface side of the absorbent core is covered with a liquid-impermeable sheet, and the liquid-impermeable sheet rotates in both widthwise sides of the absorbent core, and the inner attachment portion and the inner protruding portion on the surface sheet side of the absorbent core. Disposable diapers lined up to the boundary and the corresponding position.

The method of claim 9,
The width of the inner protruding portion is wider than the width of the surface side portion of the internal body to which the inner attaching portion is fixed,
The inside of the inner side where the inner attachment portion is fixed by the sum of the width of the portion of the diaphragm side of the outer protruding portion located on the surface side of the viscera in the diaper deployment state and the width of the last side portion of the outer protruding portion. It is wider than the width of the surface side part of the sieve,
Disposable diaper having no liquid-impermeable sheet in the inner barrier cuff and the outer barrier cuff.

In a disposable diaper having a liquid-permeable surface sheet and an absorbent core disposed on the outer surface side, the inner body covering the back side from the dorsal side through the groin portion, and a sheet-shaped outer body attached to the outer surface side of the inner body. ,
A band-shaped inner barrier cuff is provided along the widthwise both sides of the interior body in the front-rear direction, and at the same time, the band-shaped band is arranged in the front-rear direction along the width-wise side of the interior body outside the inner barrier cuffs. The outer barrier cuffs are provided respectively,
The said inner barrier cuff becomes an inner side attachment part fixed to the site | part which the edge part of the width direction one side contains the surface side part in the width direction edge part of the said interior body, and the parts other than this inner side attachment part are inner side attachment. An inner protruding portion protruding from the portion, and both front and rear ends of the inner protruding portions are fixed to the surface of the surface sheet, and the front and rear middle portions become an unfixed inner free portion, An elongated elastic member is fixed in the stretched state along the direction,
The outer barrier cuff is an outer attachment portion whose end on one side in the width direction is fixed with respect to the back side portion at the end in the width direction of the interior, and portions other than the outer attachment portion protrude from the outer attachment portion. An outer protrusion, and both front and rear ends of the outer protrusion extend from the outer attachment portion to the surface of the front and rear ends of the inner protrusion in the inner barrier cuff through the side of the internal body; It consists of the bamboo side part fixed to the surface of the front-back direction both ends of a part, and the terminal side part folded in the width direction outward from the end of this bamboo side part, and fixed to the said bamboo side part, The front-back direction middle part is unfixed It becomes an outer free part, and goes along the front-back direction at least the last part of this outer free part And a long-shaped elastic member to a disposable diaper characterized in that it is fixed in a stretched state.

The method of claim 11,
In the diaper development state, a boundary between the inner attachment portion and the inner protrusion portion is located at a portion of 3 to 20 mm from the side edge of the interior surface side to the width direction center side, and the outer attachment portion and the outer protrusion portion Disposable diapers having a boundary of 5 to 30 mm from the side edge of the interior body back side toward the width direction center side.

The method of claim 12,
In the interior, the outer surface side of the absorbent core is covered with a liquid-impermeable sheet, and the liquid-impermeable sheet is turned on both sides in the width direction of the absorbent core, and the inner attachment portion and the inner protrusion on the surface sheet side of the absorbent core. Disposable diapers lined up to the boundary of the division and the corresponding position.

The method of claim 13,
The width of the inner protruding portion is wider than the width of the surface side portion of the internal body to which the inner attaching portion is fixed,
The inside of the inner side where the inner attachment portion is fixed by the sum of the width of the portion of the diaphragm side of the outer protruding portion located on the surface side of the viscera in the diaper deployment state and the width of the last side portion of the outer protruding portion. It is wider than the width of the surface side part of the sieve,
Disposable diaper having no liquid-impermeable sheet in the inner barrier cuff and the outer barrier cuff.

The method of claim 11,
The exterior body comprises a dorsal exterior sheet covering the dorsal side and a dorsal exterior sheet covering the dorsal side of the body circumference of the wearer, and having the upper edge of the dorsal exterior sheet and the upper edge of the dorsal exterior sheet aligned, Is a tubular body circumference formed by joining the junction of the widthwise side edges of the edge and the junction of the widthwise side edges of the dorsal exterior sheet,
The inner body is a disposable diaper, wherein the front end portion is connected to the inner surface of the central portion in the width direction of the dormant exterior sheet, and the rear end portion is connected to the inner surface of the central portion in the width direction of the dorsal exterior sheet.

The method of claim 15,
The absorbent core is located between the front end, the rear end, and between them, and has a narrow tightening part compared with the front end and the rear end,
The front end and the rear end of the tightening part are located on the groin side than the lower end of the body circumference,
The minimum width of the tightening portion is 50 to 85% of the width of the front end of the absorbent core and the width of the rear end of the absorbent core,
A disposable diaper, wherein the boundary between the inner attachment portion and the inner protrusion portion is disposed so as to terminate the tightening portion in the front-rear direction.