JP3886337B2 - Insertable disposable absorbent article - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In particular, the present invention relates to an insertion-type disposable absorbent article that can ensure a large effective absorbent surface area while ensuring a sufficient standing height of a three-dimensional gather.
[0002]
[Prior art]
In addition to disposable paper diapers that are generally used, insertion-type disposable absorbent articles that are used by being inserted into underwear or the like are known.
[0003]
Even in this type of disposable disposable absorbent article (hereinafter simply referred to as an absorbent article or an absorbent pad), those having a three-dimensional gather standing on the surface side along the longitudinal direction on both sides have become mainstream. Conventionally, there are two methods for forming a three-dimensional gather from the viewpoint of the standing direction of the three-dimensional gather.
[0004]
First, as shown in FIG. 5, the first method is a gather that forms a side flap SF that is fixed to the liquid-impervious backsheet 1 and an adhesive on both sides of the absorbent article and does not have the absorber 3. An inner sheet portion of the sheet 4 (hereinafter referred to as a three-dimensional gather forming sheet 4A) is formed to extend inward starting from the upper side edge of the absorber 3, and is elastic at the tip of the three-dimensional gather forming sheet 4A. The stretchable material 9 is disposed, and the inner surface side is fixed to the liquid-permeable sheet surface 2 at both ends in the longitudinal direction of the absorbent article of the three-dimensional gather forming sheet 4A. As shown in FIG. 6, the second method is to fold the three-dimensional gathering sheet 4 </ b> A outward and to extend both ends in the longitudinal direction of the absorbent article. In by fixing the outer side in the gather sheet 4 surface, the standing gather forming sheet 4A is a way to be erected in the reverse V-shape in cross section. In addition, many absorbent articles currently marketed employ the first method.
[0005]
[Problems to be solved by the invention]
The three-dimensional gather formed by the first method has an advantage that the excrement that is about to leak to the side can be reliably dammed by the lateral V-shaped pocket PK formed by the three-dimensional gather. However, on the other hand, the three-dimensional gathering easily covers the surface of the absorber, and the effective utilization width YB is reduced, so that the effective absorber surface area of the absorber 3 is reduced and the absorption capacity is reduced. It was. In order to solve this problem, for example, if the standing height of the three-dimensional gather is reduced, this time, the elastic elastic member 9 arranged at the tip of the three-dimensional gather will not fit into the skin reliably, and excrement and urine will leak from the gap. Problems will occur.
[0006]
On the other hand, in the case of the three-dimensional gather formed by the second method, since the three-dimensional gather is raised outward from the standing point of the three-dimensional gather, the absorbent body between the standing points of the three-dimensional gather arranged on both sides Although the area can be effectively used, there is a problem that the excrement easily leaks.
[0007]
Regardless of the first or second method, in the case of this type of absorbent article, the waist becomes heavier due to the waist becoming familiar with the skin or the absorber absorbs urine while wearing. Absorption articles gradually fall off due to reasons such as, when the standing height of the three-dimensional gather is not sufficient, a gap is formed between the skin and excrement easily leaks sideways There were problems such as.
[0008]
On the other hand, the insertion-type disposable absorbent article has no side flap at the front end portion and is relatively narrow in product width as compared with general tape-type disposable paper diapers and pants-type disposable paper diapers. If the product width of the crotch part is narrow, the anti-sudging effect will be reduced, and body fluid that exceeds the allowable amount will easily get over the three-dimensional gather, and the body fluid that exceeds the three-dimensional gather will be difficult to clog with the side flaps, and side leakage will easily occur. There are problems such as.
[0009]
In addition, when wearing on the underwear, the wearer is not necessarily attached to the center in the width direction of the underwear, and may be worn on either the left or right side. In such a case, if the fitting property (following property) of the three-dimensional gather is poor, there is a problem that side leakage is likely to occur.
[0010]
Therefore, the main problem of the present invention is that even if the width of the absorbent body is narrow, it has a sufficient absorption capacity as a whole, and the solid gathers with a high damming effect are surely prevented from causing side leakage of body fluids, and the rising height of the solid gathers. The effective absorbent surface area of the absorber can be increased while ensuring sufficient thickness, and even if the absorbent article slides down from the wearing state, the three-dimensional gathers follow the sliding and does not form a gap with the skin. An object of the present invention is to provide an insertion type disposable absorbent article.
[0011]
[Means for Solving the Problems]
The present invention for solving the above-mentioned problems is that an absorbent body is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet, and at least at the standing tip part in the longitudinal direction on both sides of the surface. In the insertion-type disposable absorbent article in which a three-dimensional gather standing on the surface side is formed by arranging an elastic elastic member along the
In the three-dimensional gather, the front side sheet portion is turned upside down along the longitudinal direction of the absorbent article from the height direction middle point, and the proximal side sheet portion is transparent from the folding middle point at both ends in the longitudinal direction. While fixed to the surface of the liquid top sheet, and fixed to the upper surface side so as to fold the front end side sheet portion from the folding intermediate point, at least in the crotch portion, and standing up from the standing point, It is an upright shape with a cross-sectional shape that is inverted to the outside at the turning middle point and stands up toward the outside, and the standing point of the three-dimensional gather is located on the outer side of the side edge of the absorber ,
A folded-back elastic stretchable member is disposed along the longitudinal direction at the folded-back intermediate point portion, and a folded-up surface elastic stretchable member is disposed in the middle from the folded-up midpoint to the tip. The elastic force of the folded elastic elastic member is set to 70 to 95% with respect to the elastic force of the elastic elastic member arranged at the standing tip of the three-dimensional gather .
[0012]
In this case, the relationship between the product width C, the distance B from the upright fixing point to the folding middle point, and the distance A from the folding middle point to the tip is C / 20 <A <B <C / 4. It is desirable to have a relationship.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0014]
FIG. 1 is a partially broken development view of an insertion-type disposable absorbent article according to the present invention, and FIG. 2 is an enlarged development view of an essential part thereof. In the figure, the x mark is a symbol indicating an adhesion site.
[0015]
In FIG. 1, an insertion-type disposable absorbent article includes a liquid-permeable top sheet 2 that covers a use surface side, a liquid-impervious back sheet 1 that covers an outer surface side of the absorbent article, and the liquid-permeable top sheet 2 and liquid-impervious liquid. An absorbent body 3 having a substantially hourglass shape and made of cotton-like pulp or the like interposed between the absorbent back sheet 1 and a gather sheet 4 for forming a three-dimensional gather BK standing on the surface side on both sides of the absorbent article; Consists mainly of.
[0016]
The liquid-impervious backsheet 1 and the liquid-permeable topsheet 2 extend together on the front side and the rear side of the absorbent article to form end flaps EF that do not have an absorbent body. Side flap SF without an absorber is formed by the conductive back sheet 1 and the gather sheet 4.
[0017]
The details will be described below.
The liquid-impervious backsheet 1 can be made of a plastic film such as polyethylene or polypropylene, or a laminated non-woven fabric in which a non-woven fabric is bonded to the outer surface side of the plastic sheet in order to improve the appearance and feel. 3 extends outward from the periphery of the belt 3 to form a rectangular shape, and the laterally extending portion together with the side portion of the gather sheet 4 described later constitutes a side flap portion SF in which no absorber is present. . As the liquid-impervious backsheet 1, those having moisture permeability have been used in recent years from the viewpoint of preventing stuffiness. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. is there. In addition, one or a plurality of strips, in the illustrated example, two strips of adhesive layers 5 and 5 are formed on the outer surface of the liquid-impermeable backsheet 1, and the outer surface side adheres to the underwear when inserted into underwear or the like. However, the position is not easily displaced.
[0018]
On the other hand, the liquid-permeable top sheet 2 is, for example, a perforated or non-porous nonwoven fabric or a perforated plastic sheet. As the raw material fibers constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.
[0019]
The absorbent body 3 interposed between the liquid-impervious back sheet 1 and the liquid-permeable top sheet 2 forms an hourglass shape as a whole, but at least the crotch portion when viewed from the starting point position of the three-dimensional gather BK Then, the side edge of the absorber 3 does not protrude sideward from the upright point, and the absorber area is reduced. That is, the absorbent body 3 has a rectangular shape rather than an hourglass shape, and the constricted portions 3a and 3a are formed so as to have a side edge on the inner side of the rising point of the three-dimensional gather BK at a portion corresponding to the crotch on both side edges. Has been. The absorbent body 3 is covered with a rectangular crepe paper 6 in order to maintain the shape and improve the absorbability at the crotch portion as described later.
[0020]
A pair of left and right three-dimensional gathers BK projecting toward the use surface along the longitudinal direction is formed on both sides of the surface of the absorbent article.
[0021]
As shown in detail in FIGS. 2 and 3, the three-dimensional gather BK is an inner sheet portion of the gather sheet 4 provided to extend to the side flap portion SF corresponding to the liquid-impermeable back sheet 1. At least in the crotch portion, the outer side position of the absorbent body 3 is set up as an upright point K. Specifically, the inner sheet portion of the gather sheet 4 is folded back so that the tip side sheet portion is turned outward along the longitudinal direction of the absorbent article from the height direction intermediate point Hp. with absorbent side sheet surface K _D of the standing point side than the folded intermediate point Hp is fixed to the liquid pervious top sheet 2 side in the TA, the inner surface K _U of the distal side sheet portion folded back at the folded intermediate point Hp Is folded and fixed to the outer surface of the gather sheet 4. Further, the front end portion of the three-dimensional gather BK is folded back twice with a predetermined width, and in the illustrated example, one elastic elastic member 9 (hereinafter referred to as a front end elastic elastic member) is disposed at the front end portion of the folded portion. By using the expansion / contraction force, the three-dimensional gather BK rises inward from the standing point K at least in the crotch portion, and reverses outward at the turn-back intermediate point Hp and faces outward. The standing section has a substantially square standing shape.
[0022]
In this case, as shown in FIG. 3, the relationship between the product width C, the distance B from the rising point K to the folding intermediate point Hp, and the distance A from the folding intermediate point Hp to the tip is C / 20. It is desirable that <A <B <C / 4. If the distance A from the folding intermediate point Hp to the tip is too long, the elastic force of the elastic elastic member 9 cannot be transmitted, and the lower barrier sheet portion cannot stand up from the folding intermediate point Hp, and particularly B <A. In this case, when the absorbent article is folded in three in the width direction, the sheet portion at the distance A is caught on the folded portion of the three fold, and there is a possibility that problems such as gaps may occur during use due to creases on the sheet. . In addition, when C / 20 ≧ A, the dimension A portion does not come into surface contact with the skin, the fit property (following property) is lowered, and a gap is easily formed between the skin and the three-dimensional gather. Lateral leakage tends to occur, which is not preferable. Further, if B ≧ C / 4, the effective utilization width YB is small, and therefore the three-dimensional gather BK tends to cover the body fluid discharge site of the absorbent article, which is not preferable.
[0023]
As shown in FIG. 3, the three-dimensional gather BK configured as described above stands up toward the inner side of the absorber from the standing point K, and then flips outward at the turn-back intermediate point Hp and stands up toward the outer side. It becomes like this. Therefore, a horizontal V-shaped pocket PK is formed by the lower barrier sheet portion of the three-dimensional gather BK, and this portion can surely prevent the side leakage of excrement, while ensuring a sufficient standing height. The effective use width YB of the absorber can be widened. Furthermore, the folded structure of the three-dimensional gather BK is a three-dimensional gather structure that expands and contracts in the vertical direction. Even if the absorbent article slides down after wearing, the three-dimensional gather BK expands and contracts between the skin and the skin. It becomes possible to follow the sliding down of the absorbent article without leaving a gap.
[0024]
Further, since the rising point K of the three-dimensional gather BK is located outward from the side edge of the absorber 3, the lateral V-shaped pocket PK is further outward from the side edge of the absorber 3. It has a deep pocket structure that reaches the starting point K of the three-dimensional gather BK, and can reliably contain body fluids and the like. In the horizontal V-shaped pocket PK, the crepe paper 6 extends in the constricted portion 3a of the absorber 3, and body fluid and the like that have entered the horizontal V-shaped pocket PK are absorbed by the crepe paper 6. It is diffused in the width direction and the longitudinal direction, and is eventually absorbed by the absorber 3.
[0025]
As a material for forming the gather sheet 4, a plastic sheet or a melt-blown nonwoven fabric can be used. However, in terms of touch to the skin, the nonwoven fabric may be made of a silicon-based, paraffin metal-based, alkylchromic croid-based water repellent or the like. Those subjected to water repellent treatment are preferably used. Further, in order to prevent body fluid from seeping out from the gather sheet 4, it is desirable to use a material whose numerical value according to the water pressure resistance test method stipulated in JIS L 1092 is 120 mm or more. Further, in order to prevent bleeding, it may be used as a double sheet.
[0026]
On the other hand, one or a plurality of side flaps SF existing outside the three-dimensional gather BK are disposed along the longitudinal direction of the absorbent article between the gather sheet 4 and the liquid-impermeable back sheet 1, one in this example. The elastic elastic member 8 is fixed by a hot-melt adhesive or the like, and a flat gather GK that is pleated and stands on the surface side is formed by the elastic force. As the elastic elastic members 8 and 9, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, and polyethylene that are usually used can be used.
[0027]
According to such an absorbent article, the three-dimensional gather BK contacts the circumference of the wearer's leg when worn, and is formed by the barrier sheet portion below the folding middle point Hp of the three-dimensional gather BK and the liquid-permeable sheet 2. The V-shaped pocket PK functions as a pocket for the excrement confinement to reliably prevent the excrement from getting over, and the urine passes through the liquid-permeable sheet 2 in the effective absorber area secured sufficiently wide. Absorbed by the absorber 3. Even if the three-dimensional gather BK is crossed and leaks in the lateral direction, the plane gather GK formed by the elastic elastic member 8 prevents the side leak.
[0028]
By the way, as shown in FIG. 4, a plurality of elastic elastic members are disposed along the longitudinal direction of the absorbent article including the folding middle point Hp of the three-dimensional gather BK and between the folding middle point Hp and the tip. be able to. In the example shown in the drawing, in addition to the tip elastic member 9, an elastic elastic member 10 (hereinafter referred to as a folded elastic elastic member) is disposed at the folding middle point Hp of the three-dimensional gather BK, and from the folding middle point Hp. One elastic expansion / contraction member 11 (hereinafter referred to as a folded surface elastic expansion / contraction member) is disposed in the middle to the tip. In this case, it is desirable that the elastic force of the elastic elastic members 10 and 11 be smaller than that of the elastic elastic member 9 at the tip portion disposed at the tip. Specifically, it is good to be about 70 to 95% of the elastic force of the tip elastic member 9.
[0029]
The folded portion elastic elastic member 10 can reliably stand the barrier sheet portion below the folded middle point Hp, and when the absorbent article is in close contact with the skin, the folded portion elasticity The upper barrier sheet portion between the elastic member 10 and the tip elastic elastic member 9 disposed at the tip is brought into close contact with the skin so as to surely prevent the body fluid from getting over. Moreover, if one (or a plurality) of elastic elastic members 11 are disposed on the upper barrier sheet portion that is in close contact with the skin in a planar shape, it is more difficult to get over body fluids and the like. Lateral leakage can be reliably prevented.
[0030]
In addition, when the absorbent article slides down, the folded-back elastic elastic member 10 having a small elastic force is first separated from the skin, but the tip elastic elastic member 9 is kept in a state fitted to the skin, and the present invention It prevents the formation of a gap between the three-dimensional gather BK and the skin as intended.
[0031]
【The invention's effect】
As described above in detail, according to the present invention, the front-side sheet portion is turned upside down along the longitudinal direction of the absorbent article from the intermediate point in the height direction of the three-dimensional gather, and the folded state is obtained at both longitudinal ends of the absorbent article. In the crotch part of the absorbent article, the barrier sheet portion below the folding intermediate point is a barrier toward the inner side, and the barrier sheet portion above the folding intermediate point is the outer side. It becomes a barrier toward Further, since the standing point of the three-dimensional gather is located on the outer side with respect to the side edge of the absorber, the lateral V-shaped pocket is formed deeply. Therefore, even if the width of the absorber is narrow, it has sufficient absorption capacity as a whole, and it is possible to prevent the side leakage of body fluids reliably by the three-dimensional gathers, and the effective of the absorber while ensuring sufficient standing height of the three-dimensional gathers. The absorber surface area can be increased.
[0032]
Further, since the three-dimensional gather can be expanded and contracted in the height direction by the folded structure, even if the absorbent article slides down from the wearing state, the three-dimensional gather does not follow the sliding and form a gap with the skin. Etc. will be brought at the same time.
[Brief description of the drawings]
FIG. 1 is a partially broken development view of an insertion-type disposable absorbent article according to the present invention.
FIG. 2 is an enlarged development view of a main part thereof.
FIG. 3 is a cross-sectional view at the center position of the absorbent article.
FIG. 4 is an enlarged development view of a main part when a folded-back elastic elastic member 10 and a folded-surface elastic elastic member 11 are provided on the upper barrier sheet portion of the three-dimensional gather.
FIG. 5 is a cross-sectional view of an absorbent article showing a conventional example of forming a three-dimensional gather.
FIG. 6 is a cross-sectional view of an absorbent article showing another conventional three-dimensional gathering example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Liquid impervious back sheet, 2 ... Liquid permeable top sheet, 3 ... Absorber, 4 ... Gather sheet, 8 ... Elastic elastic member, 9 ... End part elastic elastic member, 10 ... Folding part elastic elastic member, 11 ... Folded surface elastic elastic member, Hp ... Folding middle point, BK ... Solid gather, SF ... Side flap part, PK ... Horizontal V-shaped pocket, K ... Erecting point

Claims (2)

An absorbent body is interposed between the liquid-permeable top sheet and the liquid-impervious back sheet, and elastic stretch members are disposed along the longitudinal direction at least at the standing tip portions on both sides of the surface. In the insertion-type disposable absorbent article in which a three-dimensional gather standing on the surface side is formed,
In the three-dimensional gather, the front side sheet portion is turned upside down along the longitudinal direction of the absorbent article from the height direction middle point, and the proximal side sheet portion is transparent from the folding middle point at both ends in the longitudinal direction. While fixed to the surface of the liquid top sheet, and fixed to the upper surface side so as to fold the front end side sheet portion from the folding intermediate point, at least in the crotch portion, and standing up from the standing point, It is an upright shape with a cross-sectional shape that is inverted to the outside at the turning middle point and stands up toward the outside, and the standing point of the three-dimensional gather is located on the outer side of the side edge of the absorber ,
A folded-back elastic stretchable member is disposed along the longitudinal direction at the folded-back intermediate point portion, and a folded-up surface elastic stretchable member is disposed in the middle from the folded-up midpoint to the tip. The insertion-type disposable absorbent article is characterized in that the elastic force of the folded elastic elastic member is set to 70 to 95% with respect to the elastic force of the elastic elastic member disposed at the standing tip of the three-dimensional gather . The relationship between the product width C, the distance B from the standing fixed point to the folding middle point, and the distance A from the folding middle point to the tip is a relationship of C / 20 <A <B <C / 4. Item 1. The disposable disposable absorbent article according to Item 1.

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