EP0453678A1
Expired / Lapsed
EP
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Low permeability fabric and method of making same
Assignee: Stern and Stern Industries Inc
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Filing: 1990-04-27
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Granted: —
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Expires: 2010-04-27
Abstract
Abstract A strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth (10) is disclosed. The cloth (10) has a permeability of not more than 0.5 cubic centimetre of air per second per square centimetre of cloth at a pressure drop of 1.27 centimetres of water across the cloth, and may be calendered on both sides to reduce its permeability. The fabric is particularly suitable for use in the production of expansible passenger-restraint bags for motor vehicles.
Inventors
- 👤 Peter B. Thornton
- 👤 Stanley H. Cone
- 👤 George W. Booz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 21:13
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/235; D; D03; D03D; D03D1/00; D03D1/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1352; Y10T428/1362; Y10T442/00; Y10T442/30
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
46 words
A strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth, characterized by a permeability of not more than 0.5 cubic centimetre of air per second per square centimetre of cloth at a pressure drop of 1.27 centimetre of water across the cloth.
Claim 2
Dependent Claim
58 words
The fabric of Claim 1, further characterized by a Mullen burst strength of at least 4482 kilopascals, a tensile strength of at least 1334 newtons, a trapezoid tear of at least 178 newtons, an elongation at break of at least 25%, a weight of not more than 280 gm/square metre, and a thickness of less than 0.041 centimetre.
Claim 3
Dependent Claim
28 words
The fabric of Claim 1 or Claim 2, wherein said cloth is woven in a 1 x 1 plain weave, preferably in a 2 x 2 basket weave.
Claim 4
Dependent Claim
18 words
The fabric of any preceding claim, wherein said cloth is woven about 20 ends/centimetre by about 17-20 picks/centimetre.
Claim 5
Dependent Claim
11 words
The fabric of any preceding claim, wherein said cloth is polyester.
Claim 6
Dependent Claim
28 words
The fabric of any preceding claim, wherein said cloth is woven of not greater than 600 denier multifilament yarn, preferably 400-600 denier polyester multifilament yarn having 100-300 filaments.
Claim 7
Dependent Claim
14 words
The fabric of any preceding claim, wherein said cloth is calendered on both sides.
Claim 8
Independent Claim
70 words
A method of making a strong, lightweight, thin, flexible fabric of low permeability, comprising the steps of: (A) providing an uncoated, woven, strong, lightweight, thin, flexible cloth of high permeability; and, (B) calendering the cloth on both sides to reduce the permeability to not more than 1,5 cubic centimetres of air per second per square centimetre of cloth at a pressure drop of 1.27 centimetre of water across the cloth.
Claim 9
Dependent Claim
66 words
The method of Claim 8, wherein the cloth is calendered to reduce its permeability while providing a Mullen burst strength of at least 4482 kilopascals, a tensile strength of at least 1334 newtons, a trapezoid tear of at least 178 newtons, an elongation at break of at least 25%, a weight of not more than 280 gm/square metre and a thickness of less than 0.041 centimetre.
Claim 10
Dependent Claim
48 words
The method of Claim 8 or Claim 9, wherein the cloth is calendered on both sides to reduce the permeability to not more than 0.5 cubic centimetre of air per second per square centimetre of cloth at a pressure drop of 1.27 centimetre of water across the cloth.
Claim 11
Dependent Claim
39 words
The method of Claim 9 or Claim 10, wherein the cloth is calendered in a calender exerting a pressure of 448-517 kilopascals at a temperature of about 177-188°C, and preferably about 483 kilopascals at a temperature of about 182°C.
Claim 12
Dependent Claim
48 words
The method of Claim 9 or Claim 10, wherein the cloth is calendered in a calender exerting 59.0-72.6 x 10³ kilograms/178 cm base at a nominal nip of 1.27 centimetre at a temperature of 177-188°C, and preferably about 63.5 x 10³ kilograms at a temperature of about 182°C.
Claim 13
Dependent Claim
13 words
The fabric produced by the method of any of Claims 8 to 12.
References Cited (Backward Citations)
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