Spandex fiber having improved adhesive characteristics with hot melt adhesive and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-10174197-B2
Application number	US-201414893031-A
Country	US
Kind code	B2
Filing date	Jan 7, 2014
Priority date	Aug 13, 2013
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

The present invention relates to a spandex fiber and a method for manufacturing the same that is capable of providing excellent adhesive characteristics, by means of a hot melt adhesive, between the spandex fiber and a polypropylene nonwoven fabric or a polyethylene film, during a diaper-manufacturing process. The method for manufacturing a spandex fiber comprises the steps of: preparing a polyurethane urea solution as a spinning solution; and dry-spinning the spinning solution to obtain the spandex fiber, where the polyurethane urea solution contains, with respect to the weight of the solid content, about 0.1 to 30 wt. % of an ethylene vinyl acetate monomer or polymer, or a derivative thereof, a C9 hydrocarbon-based resin monomer or polymer, or a derivative thereof, a C5 hydrocarbon-based resin monomer or polymer, or a derivative thereof, or a C5/C9 hydrocarbon-based resin monomer or copolymer, or a derivative thereof.

First claim

What is claimed is:

1. A spandex fiber having improved adhesive characteristics with a hot melt adhesive, wherein in a manufacture of the spandex fiber using a polyurethane urea polymer, a C9 hydrocarbon-based monomer represented by chemical formula 1 is used as an adhesion enhancer in an amount of 0.1 to 30 wt. % with respect to solid content of the polyurethane urea polymer to enhance the adhesive characteristics with the hot melt adhesive,

wherein a strength of the spandex fiber is 0.7 g/d or above and an elongation of the spandex fiber is 500% or above.

2. A spandex fiber having improved adhesive characteristics with a hot melt adhesive, wherein in a manufacture of the spandex fiber using a polyurethane urea polymer, a C5/C9 hydrocarbon-based copolymer prepared by copolymerization of the C9 hydrocarbon-based monomer represented by chemical formula 1 and C5 hydrocarbon-based monomer represented by chemical formula 2 is used as an adhesion enhancer in an amount of 0.1 to 30 wt. % with respect to solid content of the polyurethane urea polymer to enhance the adhesive characteristics with the hot melt adhesive,

wherein a strength of the spandex fiber is 0.7 g/d or above and an elongation of the spandex fiber is 500% or above.

3. The spandex fiber of claim 1 , wherein the strength of the spandex fiber is at 0.98 g/d or above and the elongation of the spandex fiber is 575% or above.

4. The spandex fiber of claim 2 , wherein the strength of the spandex fiber is at 0.99 g/d or above and the elongation of the spandex fiber is 599% or above.

Assignees

• Hyosung Corp

Inventors

• Chung Hyun Gee
• Kang Yeon Soo

Classifications

• D01F8/04

  from synthetic polymers · CPC title

• D01F6/88

  from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds · CPC title

• D01F6/70 Primary

  from polyurethanes · CPC title

• D01F1/10 Primary

  Other agents for modifying properties · CPC title

• C09J123/12

  Polypropene · CPC title