JP2013128574A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article capable of suppressing the deterioration of wear comfort caused by a side joint where a front waist area and a rear waist area are joined.SOLUTION: An absorbent article 1 is a panty-type absorbent article has a pair of side joints formed in both end parts of front and rear waist areas in the width direction by joining the front and rear waist areas, and has a pair of leg openings in which the legs of a wearer are inserted and a pair of waist openings in which the waist of the wearer is inserted. A first joint area wherein a plurality of holes are arranged at intervals in a front-back direction and a second joint area arranged outside the first joint area in the width direction are provided to the pair of the side joints and the adhesion strength of the first joint area is higher than that of the second joint area.

Description

  The present invention relates to an absorbent article.

  Patent Document 1 describes an absorbent article including joint edges obtained by joining the left and right end portions of the front waistline region and the outer end portions in the width direction of the rear waistline region. The absorbent article is joined by the joining edge part of the left end part and the right end part, thereby forming a leg circumference opening into which the wearer's leg circumference is inserted and a waist circumference opening into which the wearer's girth is inserted. It becomes the made pants shape. The bonding edge is formed in one of the left end and the right end, and a bonding strength reduction region in which the bonding strength is set relatively weaker than the bonding edge formed in the other. Is formed.

JP 2009-34209 A (FIG. 1)

  The joining edge part of the above-mentioned absorbent article is joined by a melting means composed of heat welding or ultrasonic welding, or an adhesive means using a hot melt adhesive. When the joining edge is joined by such an adhesive means, the density of the joining edge becomes high and the rigidity becomes high. In particular, when bonded by thermal welding, the density of the bonding edge increases, and the fiber becomes hard due to thermosetting. Therefore, when the side of the absorbent article is pressed against the wearer, such as when the wearer of the absorbent article lies down, the wearer may feel uncomfortable and the wearing feeling may deteriorate.

  This invention is made in view of the above-mentioned subject, and provides the absorbent article which can suppress the deterioration of the wearing feeling by the side junction part by which the front waistline area | region and the back waistline area | region were joined. Objective.

  The absorbent article according to the present disclosure includes a front-rear direction extending to the front side of the body and a rear side of the body, a width direction orthogonal to the front-rear direction, an inner direction toward the wearer, and an outer direction toward the opposite side to the inner direction. An absorbent body, a liquid-permeable top sheet disposed in the inner direction than the absorbent body, and a liquid-impermeable back sheet disposed in the outer direction than the absorbent body. Between the front waistline region disposed on the wearer's abdomen, the back waistline region disposed on the back of the wearer, the front waistline region and the back waistline region, and disposed on the wearer's inseam A pair of side joints joining the front waistline region and the rear waistline region are formed at both ends in the width direction of the front waistline region and the rear waistline region, and the wearer A pair of leg hole openings into which the legs are inserted, A pants-type absorbent article having a pair of waistline openings into which a person's waistline is inserted, wherein a plurality of holes are arranged in the pair of side joints at intervals in the front-rear direction. A first joining region, and a second joining region disposed outside the first joining region in the width direction and joining the front waistline region and the rear waistline region. In the region between the hole portion and the hole portion, the front waistline region and the rear waistline region are bonded, and the bonding strength of the first bonding region is higher than the bonding strength of the second bonding region. The summary is high.

  In the absorbent article according to the present disclosure, since a plurality of holes are formed in the side joint portion that joins the front waistline region and the rear waistline region, the rigidity of the side joint portion is reduced, and the side joint portion is worn by the wearer. Uncomfortable feeling when pressed to the side can be reduced. Moreover, since the hole part is formed in the side junction part, when a side junction part is pressed, a hole part deform | transforms and external force is absorbed and the force which acts on a wearer reduces. Moreover, the 2nd joining area | region arrange | positioned in the width direction outer side rather than a hole part has a joining strength lower than a 1st joining area | region, and its flexibility is high. Therefore, the flexibility of the side joint as a whole can be increased, the uncomfortable feeling can be reduced, and the wearing feeling can be improved.

It is a perspective view of the absorptive article concerning an embodiment. It is an expansion | deployment top view of the absorbent article shown in FIG. It is an enlarged plan view of the side junction part of the absorbent article shown in FIG. It is the figure which showed typically the deformation | transformation state of the side junction part.

  The absorbent article 1 according to the embodiment will be described with reference to FIGS. 1 to 3. The absorbent article 1 according to the present embodiment is, for example, a pants-type diaper or an open-type diaper. The diaper may be an adult diaper or a child diaper.

  The absorbent article 1 according to the present embodiment is a pants-type diaper. The absorbent article 1 corresponds to the front waistline region S1 disposed on the wearer's belly side, the rear waistline region S2 disposed on the wearer's back side, and the inseam of the wearer, and the front waistline region S1 and the rear And a crotch region S3 located between the waist region S2.

  The absorbent article 1 includes an absorbent main body 1A and an exterior body 1B. The absorbent main body 1A includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet, and an absorber 4 disposed between the top sheet 2 and the back sheet. The absorbent body 4 includes a front-rear direction L extending to the wearer's front side and rear side, a width direction W orthogonal to the front-rear direction, an inward direction toward the wearer, and a side opposite to the inward direction (away from the wearer). And an outward direction toward the side). The exterior body 1B is disposed outward from the absorbent main body 1A, and is disposed so as to cover the waist and waist of the wearer.

  FIG. 2 is a developed plan view showing a state where the absorbent article shown in FIG. 1 is developed. 2, the front waistline region S1 and the rear waistline region S2 are folded so as to overlap each other with the center in the front-rear direction L as a starting point, As a result, a pair of side joints 30 is formed on the absorbent article 1. In this way, the pants-type diaper shown in FIG. 1 is formed. The absorbent article 1 is formed with a waist opening 21 into which the wearer's waist is inserted and a pair of leg openings 22 into which the wearer's legs are respectively inserted.

  The topsheet 2 is positioned inward (wearer side) from the absorber 4. As the top sheet 2, a liquid-permeable sheet such as a nonwoven fabric or an apertured plastic film is used.

  The back sheet is disposed outward from the absorber 4 and inward from the exterior body 1B. A liquid-impermeable sheet or the like is used for the back sheet. Since the back sheet is impermeable to liquid, the excretion part discharged from the wearer and absorbed by the absorbent body can be prevented from leaking to the exterior body.

The absorber 4 is provided between the top sheet 2 and the back sheet, and absorbs excrement from the wearer. For the absorber 4, a mixture of pulverized pulp and superabsorbent polymer particles or the like is used. The basis weight of the pulp is 250 to 400 g / m ² , and the basis weight of the superabsorbent polymer particles is 140 to 200 g / m ² .

  The exterior body 1 </ b> B includes an exterior top sheet, an exterior back sheet disposed outward from the exterior top sheet, and a stretchable member disposed in an extended state in the width direction W.

  The elastic member includes a waist elastic member disposed near the waist opening 21 and a waist elastic member disposed around the waist of the wearer. The waist elastic member has a front waist elastic member 13A disposed in the front waist region S1 and a rear waist elastic member 13B disposed in the rear waist region S2. The waist elastic member has a front waistline elastic member 14A disposed in the front waistline region S1 and a rear waistline elastic member 14B disposed in the rear waistline region S2.

  The side joint portions 30 are formed at both ends in the width direction of the front waistline region S1 and the rear waistline region S2. As for the side junction part 30, the exterior body 1B of the front waistline area | region S1 and the exterior body 1B of the back waistline area | region S2 are joined by heat welding. The side joint portion 30 includes a first joint region 30A in which a plurality of holes are arranged at intervals in the front-rear direction, a second joint region 30B disposed on the outer side in the width direction than the first joint region 30A, Have

  The first joining region and the second joining region are both provided extending in the front-rear direction, and are regions that join the front waistline region S1 and the rear waistline region S2. A plurality of holes 31 are formed in the first bonding region 30A. The holes 31 are formed along the width direction, and a plurality of the holes 31 are arranged in parallel at intervals in the front-rear direction. The width of the first bonding region is the same as the width of the hole. The front waistline region and the back waistline region are bonded in the region 32 between the hole 31 and the hole 31 in the first bonding region 30A, and are bonded in the entire surface in the second bonding region 30B. The bonding strength of the first bonding region is configured to be higher than the bonding strength of the second bonding region.

  The bonding strength can be measured by, for example, the following method. The bonding strength is measured using a sample of the side bonding region so that the length dimension in the front-rear direction is about 25 mm and the length dimension in the width direction is about 30 mm. The measurement is performed by grasping the widthwise outer end of the front waistline region of the sample and the widthwise outer end of the rear waistline region and pulling them in a direction away from each other. The maximum strength is measured at a peeling speed of 300 mm / min, with the gripping interval in the front and rear waist area being about 10 mm.

  FIG. 3 is an enlarged plan view of the side joint portion of the absorbent article 1. The dimension Wa in the width direction W of the hole 31 is longer than the dimension La in the front-rear direction L of the hole 31. Therefore, when the force which goes to the width direction inner side from the width direction side of the absorbent article 1 is applied, the side junction part 30 becomes easy to deform | transform inward or outward.

  FIG. 4 is a diagram schematically illustrating a deformed state of the side joint portion. Fig.4 (a) is the state before a deformation | transformation, FIG.4 (b) and (c) showed the example of the state which applied the force which goes to the width direction inner side from the width direction side of an absorbent article. It is. Since the dimension Wa in the width direction of the hole is longer than the dimension La in the front-rear direction of the hole, the side joint portion is easily deformed in the width direction. Therefore, when the force along the width direction acts on the side joint portion, as shown in FIG. 4B, it deforms inward or outward. The irritation | stimulation to the wearer of a side junction part reduces, and the deterioration of a wearing feeling can be suppressed.

  In addition, the dimension La in the front-rear direction of the hole is longer than the distance Lb between the holes adjacent to each other in the front-rear direction. Therefore, when the force which goes to the width direction inner side from the width direction side of the absorbent article 1 is applied, it becomes easy to deform | transform further inward or outward. Further, since a plurality of hole portions are discontinuously formed along the front-rear direction, a plurality of regions 32 between the hole portions are also formed discontinuously along the front-rear direction, and each can be flexibly deformed. Therefore, as shown in FIG. 4C, the region 32 between adjacent holes may be deformed in different directions. Thus, if the area | region 32 between adjacent hole parts deform | transforms into a different direction, the resistance with respect to the force from the width direction outer side will become weak, and also discomfort can be reduced.

  In the present embodiment, the dimension Wa in the width direction of the hole 31 is longer than the dimension La in the front-rear direction of the hole, and is longer than the interval Lb between the holes adjacent to each other in the front-rear direction. However, it is not limited to this configuration. Specifically, for example, the dimension La in the front-rear direction of the hole may be longer than the dimension Wa in the width direction of the hole.

  Moreover, since the 1st joining area | region in which the hole part is formed has a small joining area which joins a front waistline area | region and a back waistline area compared with the 2nd joining area | region in which the hole part is not formed, it is enough. There is a possibility that the bonding strength cannot be secured. However, since the bonding strength of the first bonding region is relatively high, the bonding strength can be ensured and the durability can be maintained.

  Further, in the second bonding region 30B from the outer end portion in the width direction of the hole portion to the outer end portion of the absorbent article, the exterior body in the front waistline region and the exterior body in the rear waistline region are thermally welded, Hardened by curing. In FIG. 3, the second bonding region 30B and the first bonding region 30A are shown with different hatching. If the dimension in the width direction of the second bonding region 30B is too long, the uncomfortable feeling due to the side bonding portion may increase. However, since the bonding strength of the second bonding region 30B is lower than the bonding strength of the first bonding region 30A, it is possible to reduce discomfort. In addition, the dimension Wb in the width direction of the second bonding region 30B is desirably shorter than the dimension Wa in the width direction of the hole.

  Moreover, the elastic member is arrange | positioned in the area | region 32 between hole parts. Therefore, the elastic member can be sandwiched between the exterior top sheet and the exterior back sheet that constitute the exterior body 1B, and can be protected by the exterior top sheet and the exterior back sheet.

  The absorbent article comprised in this way can be manufactured with the following method, for example. First, the components constituting the absorbent article 1 such as the elastic member and the absorbent main body 1A are placed on the web constituting the exterior body 1B. Next, the web constituting the exterior body is cut along the leg opening 22. The web which comprises an exterior body is folded in the front-back direction based on the crease | fold along the width direction through the center in the longitudinal direction shown in FIG. After the web is folded, the side joints 30 are joined by ultrasonic welding or heat welding. After joining the side joining part 30, it can cut | disconnect along the outer side edge part in the width direction of an absorbent article, and each absorbent article can be obtained.

  The side joint portion is configured to be formed by thermal welding, and the melting temperature of the exterior topsheet and the exterior backsheet constituting the front waistline region and the rear waistline region is the temperature of thermal welding that forms the side joint portion. It may be lower. According to such a structure, when forming a side junction part by heat welding, an exterior topsheet and an exterior backsheet can melt | dissolve and a hole part can be formed.

  The temperature of heat welding can be adjusted with the temperature of the roll which performs heat welding. For example, when the material of the exterior top sheet and the exterior back sheet is polypropylene, the temperature of the roll can be thermally welded at 130 to 150 ° C., and when the material of the exterior top sheet and the exterior back sheet is polyethylene, Heat welding can be performed at a roll temperature of 120 to 140 ° C. Further, when the material of the exterior top sheet and the exterior back sheet is polypropylene, the hole portion can be formed while being thermally welded at a roll temperature of 170 to 185 ° C., and the material of the exterior top sheet and the exterior back sheet is In the case of polyethylene, the hole can be formed while heat welding at a roll temperature of 150 to 165 ° C.

  The area of the hole in one side joint in one side joint constituting the pair of side joints is configured to be different from the area of the hole in the other side joint. For example, if the area of the hole portion of the side joint portion is too large, the area where the front waistline region and the back waistline region are joined decreases, and the front waistline region and the back waistline region cannot secure the joint strength and are durable. May decrease. However, since the hole area is different in one side bonding part and the other side bonding part that constitute the side bonding part, in the side bonding part that has a relatively small hole area, It is possible to maintain the bonding strength between the side bonding portion and the other side bonding portion and further lower the rigidity at the side bonding portion having a relatively large hole area, thereby reducing the sense of incongruity.

  In the side joint portion, the hole portions are arranged at intervals in the front-rear direction, and the area of the hole portion with respect to the total area of the hole portion 31 and the region 32 between the hole portions is, for example, 30% to 60%. can do. In addition, the area | region between hole parts here is the hole part and hole part in the front-back direction in the area | region outside the width direction inner side edge part of a hole part and inside the width direction outer side edge part of a hole part. The area between.

  Moreover, the joining strength which joins the front waistline area | region and the back waistline area | region in one side joint part which comprises a pair of side junction part is the joint strength which joins the front waistline area | region and back waistline area in the other side joint part. You may comprise so that it may differ.

  When taking off the pants-type diaper, it is conceivable that the front waistline region and the rear waistline region of the side joint portion 30 are peeled to open one side of the pant-type diaper and separate from the wearer. According to the absorbent article in which the bonding strength of one side bonding portion and the bonding strength of the other side bonding portion are different, it is possible to easily separate the side bonding portion having a relatively low bonding strength. Therefore, the workability | operativity at the time of taking off an absorbent article can be improved.

  Examples of a configuration in which the bonding strength of the first bonding region and the bonding strength of the second bonding region are different, and a configuration in which the bonding strength of one side bonding portion and the bonding strength of the other side bonding portion are different include, for example, bonding A configuration in which the area and the bonding shape are different, a configuration in which the area of the hole is made different, a configuration in which the welding temperature by thermal welding is changed, and a configuration in which the types of adhesives are different can be exemplified.

  The joining area | region which joins the front waistline area | region and back waistline area | region in a side junction part may be arrange | positioned inside the width direction rather than the outer side edge part in the width direction of an absorbent article. Thus, by arrange | positioning a joining area | region inside the width direction rather than the outer side edge part in the width direction of an absorbent article, it can suppress that the edge part of an absorbent article becomes hard by thermosetting. Therefore, the discomfort and discomfort caused by the end of the absorbent article hitting the skin can be reduced. Note that the bonding region includes a first bonding region and a second bonding region.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

  For example, the first bonding region and the second bonding region may be configured to be bonded on the entire surface of the hatched region in FIG. 3 or may be configured to be bonded in a plurality of linear regions. Alternatively, it may be configured to join at a plurality of dot-like regions. For example, by joining in a plurality of linear regions or dot-like regions, the joining area can be reduced and the rigidity of the first joining region and the second joining region can be reduced as compared with the configuration in which the entire surface of the region is joined. it can.

DESCRIPTION OF SYMBOLS 1 ... Absorbent article 1A ... Absorbent main body 1B ... Exterior body 2 ... Top sheet 4 ... Absorber 13A ... Front waist elastic member 13B ... Rear waist elastic member 14A ... Front waist elastic member 14B ... Rear waist elastic Sexual member 21 ... waist opening 22 ... leg opening 30 ... side joint 30A ... first joint region 30B ... second joint region 31 ... hole 32 ... region between holes S1 ... front waist region S2 ... rear waist region
S3 ... Inseam area

Claims (9)

An absorbent body having a front-rear direction extending to the front side of the body and a rear side of the body, a width direction orthogonal to the front-rear direction, an inner direction toward the wearer, and an outer direction toward the opposite side of the inner direction; And a liquid-permeable top sheet disposed in the inner direction, and a liquid-impermeable back sheet disposed in the outer direction than the absorber,
Located between the front waistline region disposed on the wearer's ventral side, the back waistline region disposed on the wearer's back side, the front waistline region and the back waistline region, and disposed on the wearer's inseam An inseam area to be
At both ends in the width direction of the front waistline region and the rear waistline region, a pair of side joint portions that join the front waistline region and the rear waistline region are formed,
A pants-type absorbent article having a pair of leg-hole openings into which the wearer's legs are inserted and a pair of waist-hole openings into which the wearer's waist is inserted,
In the pair of side joint portions, a plurality of hole portions are disposed at intervals in the front-rear direction, the first joint region is disposed on the outer side in the width direction than the first joint region, and the front waistline region, A second joining region joined to the rear waistline region,
In the region between the hole portion and the hole portion of the first joining region, the front waistline region and the rear waistline region are joined,
The absorbent article, wherein a bonding strength of the first bonding region is higher than a bonding strength of the second bonding region.   The absorbent article according to claim 1, wherein the hole is formed along the width direction.   The absorbent article according to claim 1 or 2, wherein a dimension of the hole portion in the front-rear direction is longer than a distance between adjacent hole portions in the front-rear direction. The front waistline region and the back waistline region are provided with stretchable members that expand and contract in the width direction,
The absorbent article according to any one of claims 1 to 3, wherein the stretchable member is disposed between a hole and a hole adjacent to each other in the front-rear direction. In the side joint portion, the front waistline region and the rear waistline region are joined by thermal welding,
The absorptivity according to any one of claims 1 to 4, wherein a melting temperature of a sheet material constituting the front waistline region and the rear waistline region is lower than a temperature of heat welding for forming the side joint portion. Goods.   The joining strength for joining the front waistline region and the back waistline region in one side joint part constituting the pair of side joints is the joining strength for joining the front waistline region and the back waistline region in the other side joint portion. The absorbent article according to any one of claims 1 to 5, wherein the absorbent article is different.   The area of the joining region that joins the front waistline region and the rear waistline region in the one side joint portion is the area of the joining region that joins the front waistline region and the rear waistline region in the other side joint portion. The absorbent article of Claim 6 different from.   The absorbent article according to claim 6, wherein an area of the hole in the one side joint is different from an area of the hole in the other side joint.   The joining area | region which joins the front waistline area | region and the back waistline area | region in the said side junction part is arrange | positioned in the width direction inner side rather than the outer side edge part in the width direction of the said absorbent article. The absorbent article in any one.

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