EP0478897A1
Expired / Lapsed
EP
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Shock-absorbing air bag
Assignee: Teijin Ltd
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Filing: 1991-06-21
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Granted: —
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Expires: 2011-06-21
Abstract
Abstract A shock-absorbing air bag for an automobile or aircraft, has a high heat and flame resistance and satisfactory mechanical strength and comprises a high density woven fabric composed of warps and wefts each comprising (a) 0 to 90% by weight of thermoplastic synthetic fibers, for example, polyester fibers, having a denier of 5 or less and a Young's modulus of 1300 kg/mm 2 or less, and (b) 10 to 100% by weight of heat resistant organic fibers, for example, aramid fibers, having a denier of 2 or less and a thermal decomposition temperature of 300 °C or more, the woven fabric preferably having a high cover factor of 1900 or more.
Inventors
- 👤 Mitsuo Matsumoto
- 👤 Nobuo Takahashi
- 👤 Hideo Nakagawa
- 👤 Masayuki Takahashi
- 👤 Kunio Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 23:58
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/235; D; D02; D02G; D02G3/00; D02G3/02; D02G3/04; D02G3/045; D02G3/44; D02G3/446; D03; D03D; D03D1/00; D03D1/02; D03D15/00; D03D15/50; D03D15/513; D10; D10B; D10B2331/00; D10B2331/02; D10B2331/021; D10B2331/04; D10B2401/00; D10B2401/04; D10B2401/041; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T428/1369; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T442/00; Y10T442/30; Y10T442/3065; Y10T442/313
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
87 words
A shock-absorbing air bag composed of at least one high density woven fabric (A) composed of warps and wefts each comprising: (a) 0 to 90% by weight of thermoplastic synthetic fibers having a denier of 5 or less and a Young's modulus of 1300 kg/mm 2 or less; and (b) 10 to 100% by weight of heat resistant organic fibers having a denier of 2 or less and a thermal decomposition temperature of 300 ° C or more, and evenly blended with the thermoplastic synthetic fibers (a).
Claim 2
Dependent Claim
87 words
A shock-absorbing air bag composed of at least one high density woven fabric (A) composed of warps and wefts each comprising: (a) 0 to 90% by weight of thermoplastic synthetic fibers having a denier of 5 or less and a Young's modulus of 1300 kg/mm 2 or less; and (b) 10 to 100% by weight of heat resistant organic fibers having a denier of 2 or less and a thermal decomposition temperature of 300 ° C or more, and evenly blended with the thermoplastic synthetic fibers (a).
Claim 3
Dependent Claim
31 words
The air bag as claimed in claim 1, wherein the thermoplastic synthetic fibers (a) are blended with the heat resistant organic fibers in a blending weight ratio of 90:10 to 30:70.
Claim 4
Dependent Claim
28 words
The air bag as claimed in claim 1, wherein the thermoplastic synthetic fibers (a) are selected from polyester fibers, polyamide fibers, polyacrylic fibers, polyethylene fibers and polypropylene fibers.
Claim 5
Dependent Claim
23 words
The air bag as claimed in claim 1, wherein the heat resistant fibers (b) have a tensile strength of 16 g/denier or more.
Claim 6
Dependent Claim
38 words
The air bag as claimed in claim 1, wherein the heat resistant fibers (b) are selected from wholly aromatic polyamide fibers, aramid-copolymer fibers, poly-p-phenylenesulfon fibers, poly-p-phenylenesulfide fibers, wholly aromatic polyester fibers, polyimide fibers, polyethermide fibers, and polyetheretherketone fibers.
Claim 7
Dependent Claim
32 words
The air bag as claimed in claim 5, wherein the wholly aromatic polyamide fibers and aramid-copolymer fibers are selected from poly-m-phenyleneisophthalamide fibers, poly-p-phenyleneterephthalamide fibers, para-type aramid-meta-type aramid-copolymer fibers and poly-p-phenyleneoxy- diphenyleneterephthalamide fibers.
Claim 8
Dependent Claim
21 words
The air bag as claimed in claim 1, wherein the woven fabric (A) has a cover factor of 1900 or more.
Claim 9
Dependent Claim
22 words
The air bag as claimed in claim 7, wherein the cover factor of the woven fabric (A) is from 1900 to 3900.
Claim 10
Dependent Claim
22 words
The air bag as claimed in claim 1, wherein the woven fabric (A) has a fiber-packing ratio of from 0.50 to 0.87.
Claim 11
Dependent Claim
80 words
The air bag as claimed in claim 1, wherein the woven fabric (A) has a flame resistance represented by a burn-perforating time of 5 seconds or more determined in such a manner that a flame at a temperature of about 780 ° C is brought into contact with a lower surface of a specimen of the woven fabric (A) fixed to and held horizontally by a frame and a time needed to burn-perforate the specimen by the flame is measured.
Claim 12
Dependent Claim
22 words
The air bag as claimed in claim 1, wherein each of the warp and weft yarns is a stretch-broken, fasciated fiber yarn.
Claim 13
Dependent Claim
71 words
The air bag as claimed in claim 11, wherein the stretch-broken, fasciated yarn is produced by arranging at least one thermoplastic synthetic multifilament yarn and at least one heat resistant multifilament yarn in parallel with each other; randomly stretch-breaking the resultant parallel filaments while preventing a disturbance of the filaments, and fasciating the resultant stretch-broken fibers with each other by blowing air jet streams thereon to form a fasciated fiber yarn.
Claim 14
Dependent Claim
80 words
The air bag as claimed in claim 1, which further comprises at least one reinforcing apron attached to at least one portion of the air bag surrounding at least one hole formed in the air bag and composed of a woven fabric (B) comprising at least the heat resistant fibers (b) in a higher content thereof than that in the woven fabric (A) and having a cover factor of 1900 or more and a fiber-packing ratio of 0.5 or more.
Claim 15
Dependent Claim
54 words
The air bag as claimed in claim 13, wherein the woven fabric (B) for the apron contains the heat resistant fibers (b) in a content of at least 5% by weight more than that in the woven fabric (A), and the apron is attached by sewing to an inside surface of the air bag.
Claim 16
Dependent Claim
27 words
The air bag as claimed in claim 13, wherein the woven fabric (B) is composed of warps and wefts each consisting of a stretch-broken, fasciated fiber yarn.
Claim 17
Dependent Claim
85 words
The air bag as claimed in claim 1, which further comprises, in addition to the woven fabric (A), at least one woven fabric (C) composed of warps and wefts each comprising at least heat resistant organic fibers with a denier of 2 or less, a thermal decomposition temperature of 300 ° C or more and preferably a tensile strength of 16 g/d or more, said woven fabric (C) having a cover factor of 700 or more and a fiber packing ratio of 0.3 to 0.6.
Claim 18
Dependent Claim
38 words
The air bag as claimed in claim 16 wherein the additional woven fabric (C) comprises 0 to 90% by weight of thermoplastic synthetic fibers (a) and 10 to 100% by weight of the heat resistant organic fibers (b).
Claim 19
Dependent Claim
38 words
The air bag as claimed in claim 16, wherein the woven fabric (A) to be used together with the woven fabric (C) has a cover factor of 1500 or more and a fiber-packing ratio of 0.6 to 0.9.
Claim 20
Dependent Claim
29 words
The air bag as claimed in claim 16, wherein the heat resistant organic fibers (b) in the woven fabric (A) has a tensile strength of 16 g/d or more.
Claim 21
Dependent Claim
25 words
The air bag as claimed in claim 16, wherein the woven fabric (A) has a gas permeability lower than that of the woven fabric (C).
Claim 22
Dependent Claim
71 words
The air bag as claimed in claim 16, which is capable of being inflated at a location between a steering wheel and a front seat of an automobile or aircraft, and in which the woven fabric (C) forms at least a portion of a front portion of the air bag facing the steering wheel and the woven fabric (A) forms a back portion of the air bag facing the front seat.
Claim 23
Dependent Claim
25 words
The air bag as claimed in claim 16, wherein the warps and wefts of the woven fabric (C) are each a stretch-broken, fasciated fiber yarn.
References Cited (Backward Citations)
No citation records indexed.
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