Polyurethane elastic yarn and production method thereof
AssigneeInvista North America S.A R.L.
InventorsHiroshi Takayama, Toshihiro Tanaka, Masashi Hara, Hong Liu
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Abstract
[Problem] To provide a polyurethane elastic yarn which has the high strength and ductility sought in polyurethane elastic yarn, and also has excellent durability and heat resistance, as well as little fatigue at low temperature; and a production method thereof. [Means of Resolution] A polyurethane elastic yarn made from polyurethane which has polymer diol and diisocyanate as starting substances, wherein said polyurethane comprises a polyurethane A containing a polybutadiene structure in which the proportion of 1,2-bonded butadiene structure to 1,4-bonded butadiene structure in the molecule is in the range from 91:9 to 20:80.
Claims7
A polyurethane elastic yarn made from polyurethane which has polymer diol and diisocyanate as starting substances, wherein said polyurethane comprises a polyurethane A containing a polybutadiene structure in which the proportion of 1,2-bonded butadiene structure to 1,4-bonded butadiene structure in the molecule is in the range from 91:9 to 20:80 or containing a polyisoprene structure in which the proportion of 1,2-bonded isoprene structure to 1,4-bonded isoprene structure in the molecule is in the range from 91:9 to 20:80.
(canceled)
A method of producing a polyurethane elastic yarn by spinning a spinning starting solution containing polyurethane having polymer diol and diisocyanate as starting substances, wherein said polyurethane comprises a polyurethane A containing a polybutadiene structure in which the proportion of 1,2-bonded butadiene structure to 1,4-bonded butadiene structure in the molecule is in the range from 91:9 to 20:80 or containing a polyisoprene structure in which the proportion of 1,2-bonded isoprene structure to 1,4-bonded isoprene structure in the molecule is in the range from 91:9 to 20:80.
Dependencies are inferred from the claim text.