Woven polyester fabric for airbags
View Patent ↗The present invention relates to a woven polyester fabric for use in airbags. The present invention includes a woven fabric using a polyester filament yarn, wherein the polyester filament yarn has a tenacity of about 65 cN/tex or greater and an Instantaneous Thermal Creep (ITC) at 100° C. of about 0.5% or less. Additional embodiments of the present invention include an airbag made from the woven polyester fabric. Woven fabrics of the present invention can reduce the extent of seam combing during a hot module deployment of an airbag.
1. A woven fabric comprising a polyester filament yarn, wherein said polyester filament yarn comprises a tenacity of about 65 cN/tex or greater and an Instantaneous Thermal Creep (ITC) at 100° C. of about 0.5% or less.
2. An airbag comprising the woven fabric of claim 1 .
3. A polyester woven fabric comprising a hot seam combing index of about 2 or less.
4. An airbag comprising the woven fabric of claim 3 .
5. The woven fabric of claim 1 , wherein said polyester filament yarn further comprises an elongation of about 12% or greater.
6. The woven fabric of claim 1 , wherein said polyester filament yarn further comprises a tensile index of about 240 or greater.
7. The woven fabric of claim 1 , wherein said polyester filament yarn further comprises a linear density of from about 250 dtex to about 700 dtex.
8. The woven fabric of claim 1 , wherein said polyester filament yarn further comprises an aspect ratio of from about 1 to about 6.
9. The woven fabric of claim 1 , wherein said woven fabric further comprises a hot seam combing index of about 2 or less.
10. The woven fabric of claim 9 , wherein said woven fabric is a plain weave comprising a yarn density in both the warp and filling directions of about 18 yarns/cm or greater.
11. The woven fabric of claim 9 , wherein said woven fabric further comprises a cured coating of an elastomer applied at about 20 g/sq m to about 40 g/sq m.
12. The airbag of claim 2 , wherein said woven fabric is sewn together with 2 rows of stitching and at least about 5 stitches per cm.
13. An airbag module comprising a housing, an inflator located within said housing, and an airbag, wherein said airbag comprises the woven fabric of claim 1 .
14. The airbag module of claim 13 , wherein said woven fabric further comprises a cured coating of silicone elastomer.
15. The woven fabric of claim 8 , wherein said woven fabric further comprises a hot seam combing index of about 2 or less.
16. The airbag of claim 2 , wherein said woven fabric further comprises a hot seam combing index of about 2 or less and said polyester filament yarn further comprises an aspect ratio of from about 1 to about 6.
17. The airbag module of claim 13 , wherein said woven fabric further comprises a hot seam combing index of about 2 or less and said polyester filament yarn further comprises an aspect ratio of from about 1 to about 6.