Low permeability airbag cushionshaving film coatings of extremely low thickness

a low-permeability airbag and film coating technology, which is applied in the direction of envelopes/bags making machinery, paper/cardboard containers, pedestrian/occupant safety arrangements, etc., can solve the problem that the low-permeability airbag must provide a necessarily high leakage time, and achieves a reduction of permeability, high leakage potential, and low add-on amount
US20010009829A1Inactive Publication Date: 2001-07-26MILLIKEN & CO
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
MILLIKEN & CO
Publication Date
2001-07-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

Coated inflatable fabrics, more particularly airbags to which very low add-on amounts of coating have been applied, are provided which exhibit extremely low air permeability. The inventive inflatable fabrics are primarily for use in automotive restraint cushions that require low permeability characteristics (such as side curtain airbags). Traditionally, heavy, and thus expensive, coatings of compounds such as neoprene, silicones and the like, have been utilized to provide such required low permeability. The inventive fabric utilizes an inexpensive, very thin coating to provide such necessarily low permeability levels. Thus, the inventive coated inflatable airbag comprises a film laminated on at least a portion of the target fabric surface wherein the film possesses a tensile strength of at least 2,000 and an elongation at break of at least 180%. The film provides a low permeability airbag cushion exhibiting a leak-down time of at least 5 seconds as well as a very low packing volume (for more efficient use of storage space within a vehicle) for the target side curtain airbag.
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Description

[0001] This application is a continuation-in-part of co-pending application Ser. No. 09 / 557,643, filed on Apr. 25, 2000, which is a continuation-in-part of co-pending application Ser. No. 09 / 501,467, filed on Feb. 9, 2000, which is a continuation-in-part of Ser. No. 09 / 350,620, filed on Jul. 7, 1999, which is a continuation-in-part of Ser. No. 09 / 335,257, filed on Jun. 17, 1999; this application is also a continuation-in-part of co-pending application Ser. No. 09 / 406,264, filed on Sep. 24, 1999. These parent applications are herein entirely incorporated by reference.

[0002] This invention relates generally to coated inflatable fabrics and more particularly concerns airbag cushions to which very low add-on amounts of coating have been applied and which exhibit extremely low air permeability. The inventive inflatable fabrics are primarily for use in automotive restraint cushions that require low permeability characteristics (such as side curtain airbags). Traditionally, heavy, and thus...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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