Polyester sewing thread for airbag and preparation method thereof
AssigneeKolon Industries, Inc.
InventorsJae-Hyung KIM, Hyung-Keun KIM, Sang Mok LEE, Dong-Jin KWAK
Life of this patent
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Abstract
Disclosed is a polyester sewing thread usable for a fabric for an airbag and a cushion for an airbag. A polyester sewing thread is obtained by doubling and twisting a specific polyester yarn including a plurality of polyester filaments, and bonding the polyester yarn in the manner of in-bonding, out-bonding, or in-and-out bonding. The polyester fiber has high strength, middle elongation, and dry heat shrinkage, and may be used as sewing threads with excellent physical properties similar to those of a sewing thread of existing polyamide fiber (Nylon 66). A method for producing the thread is also disclosed.
Claims13
A polyester sewing thread for an airbag obtained by doubling and twisting a polyester yarn including a plurality of polyester filaments and having tensile strength of 7.8 g/d or more, elongation at break of 13% to 27%, dry heat shrinkage of 7% or less, boiling water shrinkage of 5% or less, and melted heat capacity of 35 J/g or more, and bonding the polyester yarn in the manner of in-bonding, out-bonding, or in-and-out bonding.
A preparation method of a polyester sewing thread for an airbag, the preparation method comprising:
- doubling and twisting a polyester yarn including a plurality of polyester filaments;
- and
- bonding the polyester yarn in the manner of in-bonding, out-bonding, or in-and-out bonding,
- wherein the polyester yarn has tensile strength of 7.8 g/d or more, elongation at break of 13% to 27%, dry heat shrinkage of 7% or less, boiling water shrinkage of 5% or less, and melted heat capacity of 35 J/g or more.
Dependencies are inferred from the claim text.