Air bag made of resin

• US 5,997,034 A
• Filed: 09/11/1995
• Issued: 12/07/1999
• Est. Priority Date: 09/14/1994
• Status: Expired due to Fees

• Current Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Tsuji, Atsushi, Tomita, Hiroshi, Hirai, Kinji
• Primary Examiner(s): Ellis, Christopher P.
• Application Number:
  US08/526,644
• Time in Patent Office: 1,548 Days
• Field of Search: 280/743.1, 280/728.1, 428/35.2
• US Class Current: 280/743.1
• CPC Class Codes: B60R 21/235 characterised by their material

Abstract

An air bag is made of thermoplastic urethane resin. The resin has a hardness (Shore scale A) of 88 to 92 measured by JIS K-7311; a tensile strength of 400 kg/cm² or more measured by JIS K-7311; a breaking elongation of 400% or more measured by JIS K-7311; a 100% modulus of 70 kg/cm² or more measured by JIS K-7311; a 300% modulus of 150 kg/cm² or more measured by JIS k-7311; a tearing strength of 75 kg/cm or more measured by JIS K-7311; a pour point of 180° C. to 188° C. measured by Flow Tester; and a melting viscosity of 2.5×10⁵ Ps/190° C. to 45×10⁵ Ps/190° C. measured by Flow Tester.

Claims

1. An air bag made of thermoplastic urethane resin, wherein said thermoplastic urethane resin has

a hardness (Shore scale A) of 88 to 92 measured by JIS K-7311,

a tensile strength of 400 kg/cm² or more measured by JIS K-7311,

a breaking elongation of 400% or more measured by JIS K-7311,

a 100% modulus of 70 kg/cm² or more measured by JIS K-7311,

a 300% modulus of 150 kg/cm² or more measured by JIS K-7311,

a tearing strength of 75 kg/cm or more measured by JIS K-7311

a pour point of 182°

C. to 188°

C. measured by Flow Tester, and

a melting viscosity of 2.5×

10⁵ Ps/190°

C. to 45×

10⁵ Ps/190°

C. measured by Flow Tester.

2. An air bag according to claim 1, wherein said air bag includes a front panel and a rear panel having an opening adapted to attach an inflator therein, said front and rear panels being made of the thermoplastic urethane resin and fixed together at outer peripheries.

3. An air bag according to claim 2, wherein said air bag further includes films attached to outer and inner surfaces of the rear panel around the opening, said films being made of polyimide resin having heat resistance higher than the thermoplastic urethane resin.

4. An air bag according to claim 1, wherein said air bag includes a center panel and side panels fixed to the center panel, said center and side panels defining an opening adapted to attach an inflator therein, said center and side panels being made of the thermoplastic urethane resin.