JP2006223453A - Fastening piece and disposable absorbent article using fastening piece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastening piece which shows efficiency in attaching a hook material to a base material and retains excellent adhesion force against peeling and shearing. <P>SOLUTION: The fastening piece 7 includes the sheet-shaped base material 17 and the hook material 19 joined to the base material 17 with an adhesive agent 18 and is used to keep a disposable diaper in a wearing state. The adhesive agent 18 contains a styrene block polymer of at least 5 percent by weight as a base polymer, and the basis weight applied is 50-200 g/m<SP>2</SP>. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fastening piece used for holding a disposable absorbent article such as a disposable diaper and an absorbent pad in a worn state, and a disposable absorbent article using the fastening piece.

  Conventionally, as a fastening piece used for this type of disposable absorbent article, there is a structure in which a hook material as a fixing material is attached to a sheet-like base material, and this hook material is used for a corresponding fixing. It was set as the structure which attaches | detaches to the loop material etc. as material so that attachment or detachment is possible (for example, refer patent document 1).

  In the technique disclosed in Patent Document 1, the hook material is inadvertently detached from the base material at the time of the attaching / detaching operation or the like by using both the adhesive and the thermal bonding in fixing the hook material to the base material. It is found that a good adhesive force against the acting peeling force, so-called anti-peeling adhesive force, and a good adhesive force against the acting shear force, so-called shear resistant adhesive force can be obtained simultaneously. ing.

JP-T 9-501590

  However, according to the technique disclosed in Patent Document 1, since mechanical bonding means such as thermal bonding is used, the hook portion of the hook material is crushed during thermal bonding or the like, and the entire hook portion used is used. The effective area of the hook part that effectively functions as an actual fastening piece with respect to the area is reduced. Therefore, in order to secure the effective area of the hook part desirable as a fastening piece used for the disposable absorbent article, the hook material having a larger area is considered in consideration of the hook part area that is reduced by being crushed at the thermal bonding site or the like. Was required and inefficient.

  Therefore, the problem to be solved by the present invention is to use a fastening piece that can provide an efficient and good peel-resistant adhesive force and a good shear-resistant adhesive force when attaching a hook material to a base material, and the fastening piece. An object of the present invention is to provide a disposable absorbent article.

  In order to solve the above-mentioned problems, in the invention of claim 1, a sheet-like base material and a hook material joined to the base material by an adhesive are used to hold the disposable absorbent article in a worn state. In the fastening piece used in the above, the adhesive has a structure containing a styrenic block polymer as a base polymer.

Moreover, in invention of Claim 2, in the fastening piece which concerns on invention of Claim 1, the said adhesive agent is set as the structure whose applied basic weight is 50-200 g / m < ² >.

Furthermore, in invention of Claim 3, in the fastening piece which concerns on invention of Claim 1 or Claim 2, the said base material consists of a nonwoven fabric, It is set as the structure whose basic weight is 30-100 g / m < ² >. .

  According to a fourth aspect of the present invention, in the fastening piece according to any one of the first to third aspects, the adhesive has a structure containing 5% by weight or more of the styrenic block polymer.

  Furthermore, in invention of Claim 5, it is a disposable absorbent article using the fastening piece in any one of Claim 1 thru | or 4, Comprising: Before it applies to the back part and abdomen which are applied to a back part An abdomen and a crotch part provided continuously between the back part and the front part of the abdomen are provided, and the fastening pieces are provided on the back part and / or the front part of the abdomen in left and right pairs.

  The fastening piece according to the invention of claim 1 is a structure using an adhesive containing a styrenic block polymer as a base polymer when the hook material is attached to the base material, and the adhesive itself has a rubber elastic force. Therefore, there is an advantage that not only good peel resistance but also good shear resistance can be obtained. Therefore, it is possible to join well only by bonding with an adhesive, and it is not necessary to use mechanical joining means such as conventional thermal joining, so the hook material can be used effectively without crushing the hook material, and the efficiency There are advantages that can be provided.

Further, according to the invention described in claim 2, since the adhesive has an applied basis weight of 50 to 200 g / m ² , it is possible to obtain a better peel resistance.

Furthermore, according to invention of Claim 3, since the base material consists of a nonwoven fabric and the basic weight is made into the structure which is 30-100 g / m < ² >, it is flexible and it is easy to pick in the shape stably. A fastening piece can be obtained.

  According to the invention described in claim 4, since the adhesive contains 5% by weight or more of the styrenic block polymer, it is possible to obtain a rubber elastic force that can exhibit a more effective shear-resistant adhesive force.

  Furthermore, according to the disposable absorbent article according to the invention described in claim 5, the fastening pieces according to any one of claims 1 to 4 are arranged in the back-and-back part and / or the front part of the left-right pair. Disposable with a fastening piece that has 100% effective use of the hook material and has both good shear resistance and good peel resistance at the same time in joining with the base material. Absorbent articles can be provided.

<First Embodiment>
Hereinafter, when a 1st embodiment of the present invention is described based on a drawing, as shown in Drawing 1 thru / or Drawing 3, disposable diaper 1 as an example of a disposable absorbent article is applied to a wearer's back. The back part 1a, the front part 1b applied to the abdomen, the back part 1a and the front part 1b are provided continuously between the back part 1a and the front part 1b, and both sides are formed in a slightly narrow shape so that the wearer's crotch A back sheet 3 disposed on the outer surface side, an absorbent body 4 disposed on the back sheet 3, and the back sheet 3 side covering the absorbent body 4 and the like A structure in which a top sheet 5 that is bonded to and disposed on the top sheet 5 and a side sheet 6 that is spaced apart from each other on the top sheet 5 and that is bonded and disposed on the back sheet 3 side, the top sheet 5 side, and the like are laminated. It is said that.

  The left and right side edges of the back portion 1a are provided with a pair of left and right fastening pieces 7 that are joined outwardly in the width direction. As shown in FIG. 3, in the front abdomen 1b It is set as the structure hold | maintained in the wearing condition by attaching each fastening piece 7 to the fastening part 8 with which the outer surface side of the back seat | sheet 3 was mounted | worn removably.

  In addition, waist elastic members 10 are interposed in a stretched state in portions corresponding to the waist around the wearer's waist in the back portion 1a and the front abdomen 1b, and in portions corresponding to the wearer's legs in the crotch portion 1c. The leg elastic members 11 are interposed in an extended state, and the three-dimensional elastic members 12 are interposed in an extended state at the inner edge of each side seat 6.

  Then, the waist gathers 13 along which the back portion 1a and the front abdomen 1b extend around the waist of the wearer are configured by contraction / extension of the waist elastic members 10, and the crotch portion 1c by contraction / extension of the leg elastic members 11 A leg gather portion 14 is formed in which both side edges extend around the wearer's leg, and the inner edge of each side seat 6 is pressed against the wearer's skin side by the contraction force of each three-dimensional elastic member 12. A three-dimensional part 15 that stands up in the direction is configured.

  The top sheet 5 is made of a liquid permeable material such as a liquid permeable nonwoven fabric, and the back sheet 3 is made of a liquid impermeable material such as a liquid permeable plastic film or a water repellent nonwoven fabric. .

  The absorbent body 4 has a structure arranged from the back part 1a to the front part 1b with the crotch part 1c as the center. For example, a granular polymer absorbent body is formed on a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber. The lump mixed with is wrapped with a paper sheet such as tissue paper or a covering sheet such as a liquid-permeable nonwoven sheet, and is formed into a predetermined shape.

  The side sheet 6 is made of a liquid impermeable material, such as a liquid impermeable plastic film or a water-repellent nonwoven fabric.

  The elastic member 10 for the waist, the elastic member 11 for the leg and the elastic member 12 for the solid body are made of elastic elastic materials (polyurethane yarn, polyurethane film, natural rubber, etc.) generally used for disposable diapers. It is attached by suitable attaching means such as adhesive, thermal bonding, ultrasonic bonding and the like. Preferably, a polyurethane yarn having a fineness of 300 to 1850 dtex is stretched and attached at a magnification of 1.1 to 4.0 times. Further, it is preferable to use a rubber-based hot melt adhesive as the attachment means.

  As shown in FIG. 1 and FIG. 2, each fastening piece 7 is extended in a bifurcated manner vertically from the outer edge of the rectangular sheet-like base body 17 a and the base body 17 a. A base material 17 having two pieces of knob portions 17b and an inner surface side of each knob portion 17b (one surface on the side facing the fastening portion 8 in the mounted state shown in FIG. 3) via an adhesive 18 respectively. The hook material 19 is joined.

The base material 17 is made of, for example, a nonwoven fabric, and among them, a nonwoven fabric produced by a combination of one or a plurality of production methods among a spunbond method, an air-through method, a point bond method, a melt blow method, and an airlaid method is preferable. Furthermore, the non-woven fabric manufactured by the spunbond method or the SMS method combining the spunbond method and the meltblown method with a basis weight of 30 to 100 g / m ² is flexible and has a stable shape and is easy to pick. It is more preferable also from this point. Even more preferable is a nonwoven fabric produced by a spunbond method with a basis weight of 50 to 85 g / m ² . The material may be appropriately selected from synthetic fibers such as polypropylene, polyethylene, polyester and polyamide, and natural fibers such as pulp and silk. Preferably, synthetic fibers such as polypropylene, polyethylene and polyester can be used. A fiber-based material has strength and is suitable. Most preferred are polyester fibers. The substrate 17 is not limited to a nonwoven fabric, and may be appropriately selected from woven fabric, knitted fabric, plus chip material, and the like.

  The hook material 19 includes a rectangular base sheet 19a and a large number of hook portions 19b provided so as to protrude from the surface of the base sheet 19a, and the surface side of the base sheet 19a on which the hook portions 19b are not provided is bonded. The adhesive 18 is stuck and fixed to the knob portion 17b. As the shape of the hook portion 19b, a hook shape, a hook shape or the like is preferable. As such a hook material 19, for example, “Magic tape (registered trademark)” (manufactured by Kuraray Co., Ltd.), “Quicklon (registered trademark)” ( Commercially available products such as “YKK Co., Ltd.” and “Majikuros (registered trademark)” (Kanebo Bell Touch Co., Ltd.) can be used.

  In addition, as the fastening portion 8 to which the hook material 19 is fastened and disengaged, a nonwoven fabric, a woven fabric, a knitted fabric or the like in which a fine loop structure is densely formed on the surface, a nonwoven fabric, a woven fabric, or the like is used. A so-called loop material such as a plastic film composite material on the surface may be used.

  The adhesive 18 includes a styrene block polymer as a base polymer, and examples thereof include a styrene-ethylene-butylene-styrene block copolymer (SEBS) and a styrene-ethylene-propylene-styrene block copolymer (SEPS). ), Styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene copolymer (SBS), a hydrogenated product of SIS (hydrogenated SIS), etc. Is mentioned. In addition, it is preferable to use 100% of these styrenic block polymers as the base polymer, but from the viewpoint of adjusting adhesiveness and fluidity, amorphous polyalphaolefins (APAO) such as ethylene / propylene copolymers, ordinary olefins, ethylene -Vinyl acetate copolymer (EVA) and polyester may be mixed and used.

  In addition, tackifiers such as dicyclopentadiene resins, C5 or C9 hydrocarbon resins, alicyclic hydrocarbon resins, rosins, terpenes, antioxidants, ultraviolet absorbers, softeners, plasticizers, You may add a flame retardant, a viscosity modifier, etc.

Further, the adhesive 18 preferably contains 5% by weight or more of a styrenic block polymer from the viewpoint of obtaining a rubber elastic force for obtaining an effective shear resistant adhesive force, and further contains 9% by weight or more. More preferred. Further, the melt viscosity is preferably 1,000 to 12,000 cps at 160 ° C., more preferably 3,000 to 10,000 cps. The adhesive 18 can be applied to either or both of the base material 17 surface side and the hook material 19 surface side by any method such as coater coating, spiral coating, bead coating, spray coating and the like. Good. And in this embodiment, it is apply | coated by the preferable coater coating, As the basic weight applied, it is set to 50-200 g / m < ² > from a viewpoint of peeling-proof adhesive force, More preferably, it is 70- 180 g / m ² .

  And the base end part side of the one end part in the fastening piece 7 of the said structure is clamped between the back sheet 3 and the side sheet 6, for example via the junction part 21 by a hot-melt-adhesive agent etc. It is joined. Moreover, the knob part 17b side of the other side end part in the fastening piece 7 is made into the structure hold | maintained as a folding state, as FIG.1 and FIG.2 shows. For example, the hook portion 19b of the hook material 19 attached to the inner surface side of the knob portion 17b is held in a folded state by being detachably locked to the inner surface side of the opposing base material main body portion 17a. In addition, when the base material 17 is comprised with the material which the said hook part 19b is not detachably latched, the latching member which the hook part 19b detachably latches is used for the inner surface of the base-material main-body part 17a. Just stick to the side.

  As described above, when the knob portion 17b is held in a folded state, it is effective that the hook material 19 is inadvertently attached to a place other than a predetermined place when the disposable diaper 1 is not used. It can be prevented and has excellent handleability.

  This embodiment is configured as described above, and when using the disposable diaper 1, the back portion 1a is applied to the wearer's back, and the front portion 1b drawn from the wearer's crotch is applied to the abdomen. The respective knob portions 17b in the folded state in the right and left fastening pieces 7 are developed, and the hook portions 19b in the hook material 19 on the inner surface thereof are fastened to the fastening portions 8 of the front abdomen 1b.

  In the wearing state of the disposable diaper 1, the waist gathers 13, the leg gathers 14, and the three-dimensional part 15 adhere to the skin of each part of the wearer, thereby causing side leakage of excrement such as urine, crotch leakage, and back leakage. It is possible to effectively prevent leaks such as abdominal leakage, effectively store excrement such as urine that has permeated through the top sheet 5 by the absorber 4, and effectively prevent leakage of clothes and the like to the outside by the back sheet 3 on the outer surface side. Can be prevented.

  In the present embodiment, the hook material 19 is bonded to the base material 17 using an adhesive 18 containing a styrene block polymer as a base polymer, and rubber elasticity is obtained by the adhesive 18 itself. Therefore, there is an advantage that not only good peel-resistant adhesive strength but also good shear-resistant adhesive strength can be obtained. Therefore, it can be satisfactorily joined only by joining with the adhesive 18, and it is not necessary to use a conventional mechanical joining means such as thermal joining. Therefore, the hook material 19 is made 100% without crushing the hook portion 19b. There is an advantage that it can be used effectively and can be provided efficiently.

Under the present circumstances, by making the basic weight which apply | coats the adhesive agent 18 into 50-200 g / m < ² >, a more favorable peeling-proof adhesive force can be obtained, Furthermore, 5 styrene-type block polymers are used as the adhesive agent 18. By adopting a structure containing at least% by weight, it is possible to obtain a rubber elastic force capable of exhibiting a more effective shear adhesive force.

Moreover, since the base material 17 consists of a nonwoven fabric, and the basic weight is made into the structure which is 30-100 g / m < ² >, it is flexible, and it is easy to pick and the shape is stable, and it is a fastening element with favorable intensity | strength 7 can be obtained.

<Second Embodiment>
FIG. 4 shows the second embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  That is, in this embodiment, the disposable pants 101 are shown as another example of the disposable absorbent article, and both the width direction both ends of the front abdomen 102 and the width direction both ends of the back part 103 are mutually connected by the side joints 104. A so-called pant having a crotch portion 105 extending over the front abdomen 102 and the back portion 103 and having a waist opening 106 and a pair of leg openings 107 is formed. It is structured into a mold.

  The disposable pants 101 include a waist elastic member 110 attached in a stretched state along the waist opening 106 and a leg elastic member attached in a stretched state along each of the pair of leg openings 107. 111 and an elastic member 112 for the body attached in a stretched state along the circumference of the front abdomen 102, and by the contraction / extension action of the elastic members 110, 111, 112, around the waist and legs of the wearer A waist gather portion 113, a leg gather portion 114, and a body gather portion 115 that are suitably fitted around the body and the torso are configured.

  Further, the front abdomen 102 of the disposable pants 101 is provided with a pair of left and right fastening pieces 7 each having a hook material 19 having the same configuration as that of the disposable diaper 1 of the first embodiment joined by an adhesive 18. It is set as the structure provided with the fixing | fixed part 8 which consists of a loop material etc. which are fixed detachably. At this time, each knob portion 17 b of the fastening piece 7 is in an unfolded state, and each hook material 19 is in a state of being fastened to the fastening portion 8. The disposable pants 101 can be used in an unfolded diaper state through an attaching / detaching operation between the fastening piece 7 and the fastening portion 8 as required, in addition to the case where the disposable pant 101 is used in a normal pants state. It is said that.

  The disposable pants 101 of the present embodiment are configured as described above, and a good peel resistance and a good shear resistance can be obtained even in the fastening piece 7 in the present embodiment, and the hook material 19 is made 100%. There are advantages similar to those of the first embodiment, such as effective use and efficient provision.

  In addition, in the said embodiment, although the structure which used the fastening piece 7 for the disposable diaper 1 or the disposable pants 101 is shown, an absorption pad etc. like sanitary goods etc. may be sufficient and it is not limited to the structure of embodiment. Not.

  Moreover, although the structure using a pair of right and left fastening pieces 7 is shown, a structure using a plurality of pairs of fastening pieces 7 may be used, and the shape is not limited to the shape of the embodiment.

It is an expanded view of the disposable diaper which concerns on the 1st Embodiment of this invention. FIG. 2 is an exploded view taken along the line II-II in FIG. 1. It is use condition explanatory drawing of a disposable diaper. It is use condition explanatory drawing of the disposable pants which concern on 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Disposable diaper, 1a back part, 1b front part, 1c crotch part, 17 base material, 17a base material main body part, 17b knob part, 18 adhesive agent, 19 hook material, 19a base sheet, 19b hook part, 101 disposable pants, 102 front abdomen, 103 back dorsal, 105 crotch.

Claims (5)

In a fastening piece having a sheet-like base material and a hook material joined to the base material by an adhesive, and used for holding a disposable absorbent article in a wearing state,
The adhesive piece includes a styrenic block polymer as a base polymer. The fastening piece according to claim 1,
The adhesive piece has a basis weight of 50 to 200 g / m ² to be applied. The fastening piece according to claim 1 or 2,
The said base material consists of nonwoven fabrics, The basic weight is 30-100 g / m < ² >, The fastening piece characterized by the above-mentioned. The fastening piece according to any one of claims 1 to 3,
The said adhesive agent contains the said styrene-type block polymer 5weight% or more, The fastening piece characterized by the above-mentioned. A disposable absorbent article using the fastening piece according to any one of claims 1 to 4,
A back part that is applied to the back part, a front part part that is applied to the abdomen, and a crotch part that is provided between the back part and the front part of the abdomen. A disposable absorbent article, characterized in that it is provided on the abdomen.

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