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Stretch nonwoven fabric and tapes

A technology of non-woven fabrics and thermal shrinkage rate, applied in textiles, bandages, non-woven fabrics, etc., can solve problems that have not been fundamentally solved, have not yet been developed, and achieve the effect of high scalability

Active Publication Date: 2009-09-02
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the materials disclosed in these patent documents still use adhesives, and in fact do not fundamentally solve the problem
[0004] In this way, there has not been a product that does not add an adhesive, has sufficient self-adhesiveness and appropriate stretchability as a bandage such as a bandage or a support.
In addition, for the performance of tearing by hand during use, most products are almost torn horizontally, and products that can be easily torn with one hand and can be easily fixed at the end have not yet been developed.

Method used

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  • Stretch nonwoven fabric and tapes
  • Stretch nonwoven fabric and tapes
  • Stretch nonwoven fabric and tapes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0138] As a latent crimping fiber, prepare a polyethylene terephthalate resin (component A) containing an intrinsic viscosity of 0.65, and a modified polyethylene terephthalate resin obtained by copolymerizing 20 mol% of isophthalic acid and 5 mol% of diethylene glycol. Side-by-side composite short fibers of ethylene diformate resin (component B) (manufactured by Kuraray, "PN-780", 1.7dtex x 51mm long, number of mechanical crimps 12 / 25mm, heat treatment at 130°C x 1 minute The final crimp number is 62 / 25mm). Using 100% by mass of the above side-by-side composite short fibers, the weight per unit area is 32.1 g / m by carding 2 carded fiber web.

[0139] The carded web is moved onto a conveyor net so that it passes between the conveyor and a perforated plate drum having a diameter of Holes (circular) arranged in a zigzag pattern with a pitch of 2 mm face the fiber web and the mesh belt conveyor from the inside of the perforated plate drum, and a spray-like water flow is spraye...

Embodiment 2

[0145] The carded fiber web used in embodiment 1 is passed between the perforated plate drum and the mesh belt (net) the same as in embodiment 1, except that the water pressure of the water jet sprayed out at this time is 1.2MPa, adopt and embodiment 1 The same method is used to obtain non-woven fabrics. The weight per unit area of ​​the gained non-woven fabric is 68.3g / m 2 , the non-woven fabric stretches well in the MD and CD directions, and after being stretched by hand to such an extent that it does not tear, it quickly returns to its original shape when the stress is released. The results are shown in Table 1. This nonwoven fabric was torn in the longitudinal direction with a width of 5 cm, and wound up into a roll to obtain the bandage of the present invention. This bandage was wound around the finger for about 3 weeks and then pulled strongly, resulting in a break, and the broken end could be fixed to the nonwoven fabric wrapped around the finger.

[0146] As a resul...

Embodiment 3

[0148] 95% by mass of the side-by-side composite short fibers used in Example 1 and 5% by mass of polyethylene terephthalate fibers (1.6dtex × 51mm long, 15 mechanical crimps / 25mm) were mixed, and were mixed with a carding Method to form a weight per unit area of ​​34.3g / m 2 carded fiber web. This fiber web was transferred to a belt conveyor, and a nonwoven fabric was obtained in the same manner as in Example 1 except that the fiber web was oversupplied by about 120%.

[0149] The resulting non-woven fabric has a weight per unit area of ​​62.7 g / m due to shrinkage 2 , It stretches well in both MD and CD directions, and after being stretched by hand to the extent that it does not break, it will quickly return to its original shape if the stress is released. The results are shown in Table 1. This non-woven fabric was torn in the longitudinal direction with a width of 5 cm, and rolled into a roll to obtain the stretchable self-adhesive bandage of the present invention. This b...

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Abstract

To produce a nonwoven fabric comprising a conjugated fiber comprising a plurality of resins which are different in thermal shrinkage and form a phase separation structure. In the nonwoven fabric, the conjugated fibers are arranged in a direction approximately parallel to a surface direction of the nonwoven fabric and crimped. In addition, the conjugated fibers have an average curvature radius of fiber crimp of 20 to 200 [mu]m and the crimps are distributed approximately uniformly in a thickness direction of the nonwoven fabric. The nonwoven fabric is substantially free from an adhesive agent. In the nonwoven fabric, each fiber is substantially not melt-bonded to another. The conjugated fiber may comprise a polyalkylene arylate-series resin and a modified polyalkylene arylate-series resin and have a side-by-side or eccentric sheath-core form. Since the bimetal form conjugated fibers having specific crimps are appropriately entangled with each other, the nonwoven fabric has a high stretchability and is easily torn by hand, without using scissors. The nonwoven fabric is suitable for a tape such as a bandage or a supporter.

Description

technical field [0001] The present invention relates to a non-woven fabric which is easy to tear, has stretchability and self-adhesiveness, and is suitable for tapes such as bandages or supporters used in medical or sports fields. Background technique [0002] Conventionally, in the fields of medicine and sports, various bandages, supports, and other tapes have been used for the purpose of compressing, fixing, and protecting appropriate parts such as limbs and affected parts. Functions required of these tapes include, in addition to stretchability or compliance, sweat absorption, air permeability, etc., fixability by self-adhesion or adhesion. Among these functions, soft components such as rubber or acrylic latex are usually coated on the surface of the bandage for the purpose of stretchability or fixation (see Patent Documents 1 to 5). However, these soft components may irritate the skin. , or cause dampness due to airtightness, and may even cause allergies, so it is not p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/42A61F13/02A61F13/00D04H1/50
CPCA61F13/0273D04H1/42D04H1/50Y10T428/249929Y10T442/627Y10T442/637Y10T442/629D04H1/43828D04H1/43918D04H1/43832D04H1/43835D04H1/43912D04H1/4383D04H1/43914
Inventor 木村友昭新井田康朗落合彻清冈纯人
Owner KURARAY CO LTD
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