US5236775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric for airbag
Assignee: Invista North America LLC
•
Filing: 1992-12-11
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Granted: 1993-08-17
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Expires: 2012-12-11
Abstract
Abstract There is described an airbag fabric made of a synthetic yarn. The synthetic yarn is a high-tenacity polyester filament yarn having filaments of less than 4 dtex and a yarn count within the range from 250 to 550 dtex. The fabric itself, in contrast to the conventional polyamide fabrics, is uncoated and is preferably made by weaving unsized yarns. The fabric need not be calendered. It has been found that this fabric of fine-filament high-tenacity polyester yarn, although uncoated, does meet the airbag fabric requirements such as low air permeability, low fabric weight, low fabric thickness and high fabric strength.
Inventors
- 👤 Peter Swoboda
- 👤 Gerhard Hohnke
- 👤 Wolfgang Goltner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:36
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/235; D; D03; D03D; D03D1/00; D03D1/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
60 words
An uncoated synthetic yarn fabric for a gastight part of an airbag having a gastight part and a gas-releasing part, wherein the synthetic yarn is a high-tenacity polyester filament yarn with filaments of 4 dtex or less and the yarn count is within the range from 250 to 550 dtex, and the fabric is constructed with a rib stop weave.
Claim 2
Dependent Claim
60 words
An uncoated synthetic yarn fabric for a gastight part of an airbag having a gastight part and a gas-releasing part, wherein the synthetic yarn is a high-tenacity polyester filament yarn with filaments of 4 dtex or less and the yarn count is within the range from 250 to 550 dtex, and the fabric is constructed with a rib stop weave.
Claim 3
Dependent Claim
25 words
The fabric of claim 1, wherein the polyester yarn has a tenacity of more than 60 cN/tex and a breaking extension of more than 15%.
Claim 4
Dependent Claim
20 words
The fabric of claim 1, wherein the polyester yarn has a heat shrinkage at 200° C. of less than 9%.
Claim 5
Dependent Claim
11 words
The fabric of claim 1, wherein the polyester yarn is unsized.
Claim 6
Dependent Claim
30 words
A fabric according to claim 1 for the gastight part of an airbag made of a gastight and a gas-releasing fabric part, comprising twisted warp yarns and untwisted weft yarns.
Claim 7
Dependent Claim
32 words
A fabric according to claim 1 for the gas-releasing part of an airbag made of a gastight and a gas-releasing fabric part, comprising twisted warp yarns and twisted or untwisted weft yarns.
Claim 8
Dependent Claim
15 words
The fabric of claim 5, wherein the yarn twist is within the range 110-130 turns/m.
Claim 9
Dependent Claim
24 words
The fabric according to claim 1, having a sheet weight of less than 200 g/m 2 and a thickness of less than 0.35 mm.
Claim 10
Dependent Claim
30 words
The fabric according to claim 1, having a breaking strength of more than 220 daN and a breaking extension of more 25%, each measured on a 5 cm wide strip.
Claim 11
Dependent Claim
27 words
The fabric according to claim 1 for the gastight part of an airbag possessing the maximum set for the chosen yarn count and the chosen fabric construction.
Claim 12
Dependent Claim
60 words
An uncoated synthetic yarn fabric for a gas-releasing part of an airbag having a gastight part and a gas-releasing part, wherein the synthetic yarn is a high-tenacity polyester filament yarn with filaments of 4 dtex or less and the yarn count is within the range from 250 to 550 dtex, and the fabric is constructed with a cross twill weave.
Claim 13
Dependent Claim
60 words
An uncoated synthetic yarn fabric for a gas-releasing part of an airbag having a gastight part and a gas-releasing part, wherein the synthetic yarn is a high-tenacity polyester filament yarn with filaments of 4 dtex or less and the yarn count is within the range from 250 to 550 dtex, and the fabric is constructed with a cross twill weave.
Claim 14
Dependent Claim
25 words
The fabric of claim 11, wherein the polyester yarn has a tenacity of more than 60 cN/tex and a breaking extension of more than 15%.
Claim 15
Dependent Claim
20 words
The fabric of claim 11, wherein the polyester yarn has a heat shrinkage of 200° C. of less than 9%.
Claim 16
Dependent Claim
11 words
The fabric of claim 11, wherein the polyester yarn is unsized.
Claim 17
Dependent Claim
32 words
A fabric according to claim 11 for the gas-releasing part of an airbag made of a gastight and a gas-releasing fabric part, comprising twisted warp yarns and twisted or untwisted weft yarns.
Claim 18
Dependent Claim
15 words
The fabric of claim 15, wherein the yarn twist is within the range 110-130 turns/m.
Claim 19
Dependent Claim
30 words
The fabric according to claim 11, having a breaking strength of more than 220 daN and a breaking extension of more 25%, each measured on a 5 cm wide strip.
Claim 20
Dependent Claim
31 words
The fabric according to claim 11 for the gas-releasing part of an airbag possessing a 10-25% lower than the maximum set for the chosen yarn count and the chosen fabric construction.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-16 | 1997-02-15 | 1997-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-16 | 2001-02-15 | 2001-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-16 | 2005-02-15 | 2005-08-17 | $7700.00 | Window Closed / Lapsed |