JP2009030222A - Elastic tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elastic tape with an excellent air permeability, thin but hard to buckle and no fraying of warp. <P>SOLUTION: The elastic tape is formed of a warp knitted fabric obtained by weaving wefts 4 and fusible yarn 5 along the wefts 4 into a plurality of warps 2 extending in longitudinal direction of the tape and having a plurality of continuous loops 2a, and elastic warps 3 arranged along the warps 2 and passing through the loops 2a, and thermally bonding the fusible yarn 5 to the warps 2, wefts 4 by hot pressing, wherein the tape has an improved surface rigidity of the warp knitted fabric with excellent air permeability, thin but hard to buckle and preventing fraying of warps 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elastic tape that is worn around the mouth, leg mouth, arm mouth, and the like of skin-contacting wear.

  Skin-contacting wear such as spats, supporters, and various underwear for correction, health, sports and practical use, is an increasingly thin fabric so as to improve skin adhesion and provide a slim body appearance when worn. The stretchable tapes to be worn around the mouths such as the trunk mouth, leg mouth, and arm mouth are also formed thinly. These elastic tapes are often mounted by layering the entire surface around the mouth of the skin-contacting-type wear or by sewing a part of the elastic tape protruding outside the mouth. It may be worn through.

  In such elastic tape, elastic yarns are mixed in closely arranged warp yarns, and wefts are driven into a woven fabric (for example, see Patent Document 1) and a plurality of continuous loops. There is a warp and an elastic warp threaded along each of these warp yarns and formed by a warp knitted fabric in which wefts are knitted (see, for example, Patent Document 2).

JP 2001-295152 A JP 2004-143628 A

  The elastic tape formed of a woven fabric as described in Patent Document 1 is less likely to be unwound, and since warp and weft are closely woven and have high surface rigidity, it is difficult to bend even if thin. However, there is a problem that the air permeability is poor and the skin where the tape hits easily gets stuffy. In addition, when the skin-contacting wear is worn, if the elastic tape is grasped and pulled, there is a problem that the warp is biased in the pulled direction and unevenness occurs in the woven fabric.

  On the other hand, the stretchable tape formed of warp knitted fabric as described in Patent Document 2 has good air permeability, but since it has low surface rigidity, it tends to bend when it is thin, and it folds around the mouth of the skin-contacting-type clothing. In other words, there is a problem that the skin feels uncomfortable or the beauty is lost. In addition, there is a problem that if a nail or the like is caught, it tends to be unraveled.

  Accordingly, an object of the present invention is to provide a stretchable tape that has good air permeability, does not easily bend even when thin, and does not cause unraveling or warp bias.

  In order to solve the above-described problems, the present invention provides a plurality of warps extending in the length direction of a tape and having continuous loops, and an elastic warp threaded along each of these warps through the loop. In a stretchable tape formed of a warp knitted fabric knitted in the width direction of the tape, the weft yarn is knitted in the width direction of the tape along with a fusion yarn having heat-fusibility, and the knitted fusion yarn A configuration was employed in which the warp and the weft were heat-sealed.

  That is, a warp knitting having excellent air permeability is achieved by knitting a weft yarn having heat-fusibility along the width direction of the tape along the weft yarn and heat-sealing the knitted fusion yarn into warp and weft yarns. In addition to increasing the surface rigidity of the ground, it was also possible to prevent unwinding and warp bias.

  As the fusion yarn, a yarn such as nylon or polyester having a low melting point can be used, and as a commercially available product, for example, an elder that is a nylon yarn having a melting point of 120 ° C. or less (trade name; manufactured by Toray Industries, Inc.) And Joiner (trade name; manufactured by Fuji Boseki Co., Ltd.).

  By heat-sealing the fused yarn by hot pressing, the fused yarn can be flattened into a plate shape, and the surface stiffness of the warp knitted fabric can be further increased.

  The elastic warp has thermal adhesiveness or thermal softening property, and when it has the thermal adhesiveness, the elastic warp is heat-sealed to the warp and the weft yarn and has the thermal softening property. In this case, the warp and the wefts are bitten and heat-sealed so that the surface knitting of the warp knitted fabric can be further enhanced, and the unraveling and the warp bias can be more reliably prevented.

  Examples of the elastic warp having thermal adhesion include polyurethane elastic yarn obtained by known melt spinning, and polyurethane polyurea having a melting point of 170 ° C. or more disclosed in, for example, Japanese Patent Application Laid-Open No. 2006-124841. Examples thereof include a heat-adhesive polyurethane polyurea elastic yarn obtained by a dry or wet spinning method containing 2 to 30% by weight of a thermoplastic elastomer at 160 ° C. These elastic warp yarns having thermal adhesiveness are subjected to a heat treatment step for melting the yarn itself or the thermoplastic elastomer contained in the yarn, so that the yarn is melted and thermally fused to the warp yarn and the weft yarn, Prevents unwinding and warp bias.

  The elastic warp having the heat softening property has, for example, a hardness of 80 A or less, and has no endothermic peak in a temperature range from 80 ° C. until the decomposition of the polyurethane compound starts in the differential scanning calorimeter (DSC) measurement. Polyurethane elastic yarns containing a polyurethane compound and having a lowered softening point, Leuka SF (trade name; manufactured by Asahi Kasei Fibers Co., Ltd.), which is a polyurethane elastic yarn having thermal fusing performance, and the like can be used. Since these elastic warp yarns having heat softening properties are melted and bitten into other yarns and heat-sealed, the surface stiffness can be increased without reducing the elastic performance of the elastic tape, This is particularly preferable because unwinding and warp bias can be prevented more reliably.

  The stretchable tape according to the present invention is knitted in the width direction of the tape along with the fusion yarn having heat fusion properties on the weft, and this knitted fusion yarn is thermally fused to the warp and the weft. The surface rigidity of a warp knitted fabric having excellent properties can be increased, and unwinding and warp bias can be prevented.

  By heat-sealing the fused yarn by hot pressing, the fused yarn can be flattened into a plate shape, and the surface stiffness of the warp knitted fabric can be further increased.

  The elastic warp shall have thermal adhesiveness or thermal softening property, and if it has thermal adhesiveness, it should be heat-sealed to the warp and weft, and if it has thermal softening property, By causing the warp and the weft to bite and heat-bonding, the surface knitting of the warp knitted fabric can be further enhanced, and the unraveling and the warp bias can be more reliably prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. This stretchable tape 1 is worn around the mouth, leg mouth, arm mouth, etc. of skin-contacting wear such as spats, supporters, and various underwear. As shown in FIG. A plurality of warp yarns 2 extending in the lengthwise direction and having continuous loops 2a, and an elastic warp yarn 3 having thermal adhesiveness or heat softening properties that pass along these warp yarns 2 through the loops 2a, and weft yarns 4 and weft yarns 4 is formed of a warp knitted fabric obtained by knitting a fusion yarn 5 having heat fusion properties along the tape width direction. In this embodiment, the elastic warp 3 is made of leuca SF (trade name; manufactured by Asahi Kasei Fibers Co., Ltd.) having heat softening properties, and the fused yarn 5 is an elder (trade name; manufactured by Toray Industries, Inc.) or Joiner ( Trade name: manufactured by Fuji Boseki Co., Ltd.). In addition, as the warp 2 and the weft 4, either a natural fiber or a synthetic fiber can be used.

  As shown in an enlarged view in FIG. 2, the fusion yarn 5 is heat-sealed to the warp yarn 2 and the weft yarn 4 by a heat press using an iron or the like after warp knitting. Therefore, the stretchable tape 1 formed from this warp knitted fabric has good air permeability, and the fusion yarn 5 heat-sealed to the warp 2 and the weft 4 is flattened into a plate shape and is continuous. However, since the surface rigidity is high, it is difficult for the waist to bend, and the warp 2 and the warp 2 are not biased. Moreover, even if it cuts and cuts off, a cut-off edge part will not be unraveled.

  Although the elastic warp 3 is not expressed in FIG. 2, it is thermally bonded to the warp 2 and the weft 4 so that the warp 2 and the weft 4 are bitten by the heat press after warp knitting, and the surface rigidity is further increased. Unwinding and unevenness of the warp 2 are prevented more firmly.

  In the above-described embodiment, the fusion yarn is heat-sealed by a heat press, but for example, the stretchable tape after warp knitting is stretched along a surface plate or the like, by a contact or non-contact heat source such as dryer or steam. The fused yarn can be heat-sealed also by heating. These heating conditions may be appropriately selected so that the strength of the fused yarn is maintained and the yarn is firmly fused to each yarn. Further, although the leuca SF having heat softening property is used for the elastic warp, it is also possible to use a polyurethane elastic yarn having thermal adhesiveness or a normal polyurethane elastic yarn.

Knitting structure pattern diagram showing warp knitted fabric of elastic tape of embodiment Knitting structure pattern diagram showing enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Elastic tape 2 Warp 2a Loop 3 Elastic warp 4 Weft 5 Fusion yarn

Claims (3)

  Formed with a warp knitted fabric in which wefts are knitted in the width direction of the tape into a plurality of warp yarns extending in the length direction of the tape and having continuous loops, and elastic warp yarns that pass through each of these warp yarns. In the stretchable tape, the weft yarn was knitted in the width direction of the tape along with the fusion yarn having heat fusion properties, and the knitted fusion yarn was heat-sealed to the warp yarn and the weft yarn. Elastic tape characterized by that.   The stretchable tape according to claim 1, wherein the fusion yarn is thermally fused by hot pressing.   When the elastic warp has thermal adhesiveness or thermal softening property and has the thermal adhesiveness, the elastic warp is heat-bonded to the warp and the weft yarn, and has the thermal softening property. The elastic tape according to claim 1 or 2, wherein the warp and the weft are bitten and heat-sealed.

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