Laminated material, particularly for an airbag, method for the production thereof, airbag, passive restraint systems comprising an airbag, and gas-tight polyamide polymer film
AssigneeNolax AG
InventorAdrian Schulthess
Life of this patent
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Abstract
Disclosed is a polymer film, preferably a polyamide polymer film, which comprises at least one first layer and a second layer and is laminated onto a fabric. The material of the first layer has a glass transition temperature of less than −10° C. while the material of the second layer has a glass transition temperature of less than 20° C. Preferably, the polymeric materials contain portions of polyamide blocks. The inventive fabric-polymer film laminate is suitable as a laminated material especially for an airbag.
Claims22
A laminated material, particularly for an airbag, said laminated material comprising
- a textile backing layer and
- a polymer film bound to said backing layer, wherein the polymer film comprises at least one first and one second layer, wherein
- the first layer is formed from a first polymeric material whose glass transition temperature is below −10° C., and
- the second layer is formed from a second polymeric material different from the first material whose glass transition temperature is below 20° C. and
- the first material has a melting point which is less than a melting point of said second material, wherein
- the second layer is of a material selected from the group consisting of copolyamide, polyamide elastomer, and mixtures thereof,
- the melting point of the second material is above 170° C. and
- the polymer film is produced via a foil or film-extrusion process.
A polyamide polymer film comprising at least two layers,
- a first layer made of a first material and
- a second layer made of a second material different from said first material, wherein
- the glass transition temperature of the first layer is below −10° C. and the glass transition temperature of the second layer is below 20° C., and
- the second layer is of a material selected from the group consisting of copolyamide, polyamide elastomer, and mixtures thereof,
- the first material having a melting point which is less than a melting point of said second material,
- the melting point of the second material being above 170° C. and
- the polymer film is produced via a foil or film-extrusion process.
Dependencies are inferred from the claim text.