AIRBAG FABRIC

Abstract

An airbag fabric made of polyamide filaments, wherein the polyamide filaments are made of at least 60% by weight of a bio-based monomer.

Claims

1. An airbag fabric, produced from polyamide filaments, wherein the polyamide filaments consist of at least 60% by weight of a bio-based monomer.

2. The airbag fabric according to claim 1, wherein the polyamide filaments comprise a polyamide which is selected from the group which contains PA4,10, PA6,10, PA8,10 or PA10,10 as well as copolymers and/or mixtures thereof.

3. The airbag fabric according to claim 1, wherein the bio-based monomer is decanedioic acid (sebacic acid).

4. The airbag fabric according to claim 3, wherein the decanedioic acid is obtained from castor oil.

5. The airbag fabric according to claim 1, wherein the polyamide filaments consist of at least 63% by weight, based on the total weight of the polyamide.

6. A method for producing an airbag fabric, which comprises the following steps: a) spinning filaments of a polyamide, wherein the polyamide consists of at least 60% by weight of a bio-based monomer, b) producing the airbag-fabric from the polyamide filaments produced in this manner.

7. The method according to claim 6, wherein the polyamide filaments are spun from a polyamide which is selected from a group which contains PA4,10, PA6,10, PA8,10 or PA10,10 as well as co-polymers and/or mixtures thereof.

8. The method according to claim 6, wherein the bio-based monomer is decanedioic acid (sebacic acid).

9. The method according to claim 8, wherein the decanedioic acid is obtained from castor oil.

10. The method according to claim 6, wherein the polyamide filaments are spun from a polyamide consisting of at least 63% by weight, based on the total weight of the polyamide.

Description

EXAMPLES

Example 1

[0046] A PA4,10 yarn is produced with a total denier of 235 dtex with a filament number of 36. The polymer used is produced from the monomers tetramethylene diamine and decanedioic acid. The tetramethylene diamine was produced from non-renewable raw materials and the decanedioic acid was produced from castor oil. Thus, the polymer consists of 70% by weight of monomers which are produced from renewable raw materials, based on the total weight of the polymer.

Example 2

[0047] A PA6,10 yarn is produced with a total denier of 235 dtex with a filament number of 36. The polymer used is produced from the monomers hexamethylene diamine and decanedioic acid. The hexamethylene diamine was produced from non-renewable raw materials and the decanedioic acid was produced from castor oil. Thus, the polymer consists of 63% by weight of monomers which are produced from renewable raw materials, based on the total weight of the polymer.

Example 3

[0048] A PA10,10 yarn is produced with a total denier of 235 dtex with a filament number of 36. The polymer used is produced from the monomers decamethylene diamine and decanedioic acid. The decamethylene diamine and the decanedioic acid were produced from castor oil. Thus, the polymer consists of 100% by weight of monomers which are produced from renewable raw materials, based on the total weight of the polymer.

Comparison Example 1

[0049] A PA6 yarn is produced with a total denier of 235 dtex with a filament number of 36. The polyamide PA6 consists of monomers which are produced from non-renewable raw materials.

Comparison Example 2

[0050] A PA6,6 yarn is produced with a total denier of 235 dtex with a filament number of 36. The polyamide PA6,6 consists of monomers which are produced from non-renewable raw materials.

TABLE-US-00001 Comparison Comparison Example 1 Example 2 Example 3 example 1 example 2 polymer PA4,10 PA6,10 PA10,10 PA6 PA6,6 melting 250 223 203 215 255 temperature T.sub.m [° C.] density 1.09 1.04 1.02 1.13 1.14 [g/cm.sup.3] moisture 1.90 1.60 0.90 3.10 2.70 content [%] tear 73 71 45 55 70 strength [cN/Tex] elongation 18 18 23 17 20 at break [%] modulus [%] 6.8 7.3 6.7 7.5 7.5 hot air 6.8 7.2 11.1 5.4 6.3 shrinkage [%]