Process for the manufacture of elastic polyurethane fiber...

Details Process for the manufacture of elastic polyurethane fiber... Process for the manufacture of elastic polyurethane fiber...

2007-08-14

2007-08-14

Buttner, David J. (Department: 1712)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

C264S172180, C525S066000, C525S09200D, C525S127000, C525S130000

Reexamination Certificate

active

10719758

ABSTRACT:
Disclosed is a process for the manufacture of an elastic polyurethane fiber, including mixing one component selected from among polystyrene polymers or polystyrene copolymers having a number average molecular weight of 50,000–500,000 with polyurethane having a number average molecular weight of 15,000–100,000, to prepare a polymer mixture, which is then spun. The polyurethane elastic fiber made by the method is also provided, which is greatly increased in heat set properties, with a very low rate of change of fundamental properties as the results compared with conventional elastic polyurethane fibers. Hence, the elastic polyurethane fiber can be directly applied for preparation of end products requiring superior heat set properties with no change of conventional conditions of the process.

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