Method for producing woven fabrics
View Patent ↗A method for producing woven fabrics, especially airbag woven fabrics, while using a multiphase weaving machine in the following steps: weaving a fabric comprised of filament threads in warp and weft on the multiphase weaving machine, whereby a high shrinking type of yarn is used as the warp and an average to low shrinking type of yarn is used as the weft, and finishing the woven fabric by hydroshrinking and/or thermoshrinking.
1. A method for producing woven fabrics making use of a multiphase weaving machine comprising the steps a) weaving a fabric comprised of filament threads in weft and warp on the multiphase weaving machine, wherein a high-shrinkage type of yarn is used as the warp and a medium to low shrinkage type of yarn is used as the weft; and b) finishing the woven by shrinking, the low density threads more than the higher density threads after weaving.
2. The method as set forth in claim 1 , wherein filament yarns having 8-14% and 1-5% hot air shrinkage are used as warp and weft respectively.
3. The method of claim 1 , further comprising the steps of forming an airbag of the woven fabric, and changing a substantially asymmetrical nature of the woven fabric to a substantially symmetrical nature of the woven fabric.
4. The method as set forth in claim 1 , wherein said step of finishing comprises hydro-shrinking the woven.
5. The method as set forth in claim 1 , wherein said step of finishing comprises thermo-shrinking the woven.
6. A method for producing woven fabrics comprising the steps of:
a) weaving a fabric comprised of filament threads in weft and warp, wherein a high-shrinkage type of yarn is used as the warp and a medium to low shrinkage type of yarn is used as the weft; and
b) finishing the woven by shrinking the lower density threads more than the higher density threads after weaving.
7. The method as set forth in claim 6 , wherein filament yarns having 8-14% and 1-5% hot air shrinkage are used as warp and weft respectively.
8. The method of claim 6 further comprising the steps of forming an airbag of the woven fabric, and changing a substantially asymmetrical nature of the woven fabric to a substantially symmetrical nature of the woven fabric.
9. The method as set forth in claim 6 , wherein said step of finishing comprises hydro-shrinking said woven.
10. The method as set forth in claim 6 , wherein said step of finishing comprises thermo-shrinking said woven.
11. A method of producing a woven fabric, the method comprising:
weaving a fabric from filament threads in warp and weft so that an asymmetric thread density fabric is produced, said warp filament thread being a higher-shrinkage yarn than said weft filament thread; and
shrinking the lower density threads more than the higher density threads after weaving said asymmetric thread density fabric so that a generally predetermined thread density fabric is produced.
12. The method of claim 11 , wherein said step of shrinking comprises shrinking said asymmetric thread density fabric so that a generally symmetric thread density fabric is produced.
13. The method of claim 11 , wherein the predetermined thread density fabric is part of an airbag.
14. The method of claim 11 , wherein:
said warp yarn is a high-shrinkage type of yarn; and
said weft yarn is a medium to low-shrinkage type of yarn.
15. The method of claim 14 , wherein:
said warp yarn is an 8-14% hot air shrinkage yarn; and
said weft yarn is a 1-5% hot air shrinkage yarn.
16. The method of claim 11 , wherein said step of shrinking comprises hydro-shrinking said asymmetric thread density fabric.
17. The method of claim 11 , wherein said step of shrinking comprises thermo-shrinking said asymmetric thread density fabric.
18. The method of claim 11 , wherein said step of shrinking comprises hydro-shrinking and thermo-shrinking said asymmetric thread density fabric.
19. The method of claim 11 , wherein said step of weaving comprises weaving said fabric on a multiphase weaving machine.
20. The method of claim 11 , wherein said step of weaving comprises weaving said fabric on a series shed weaving machine.
21. A method for producing woven fabrics with irreversible shrinkable filament warp and weft yarns, in making use of a multiphase weaving machine, the method comprising:
(a) weaving a fabric of filament threads in weft and warp on the multiphase weaving machine, wherein a high-shrinkage type of yarn is used as the warp and a medium-to-low shrinkage type of yarn is used as the weft; and
(b) finishing the woven by shrinking the lower density threads more than the higher density threads after weaving.
22. The method of claim 21 , wherein the fabric is part of an airbag.
23. A method for producing airbag woven fabrics, in making use of a multiphase weaving machine, the method comprising:
(a) weaving a fabric of filament threads in weft and warp on the multiphase weaving machine, wherein a high-shrinkage type of yarn is used as the warp and a medium-to-low shrinkage type of yarn is used as the weft; and
(b) finishing the woven by shrinking the lower density threads more than the higher density threads after weaving.
24. A method of manufacturing a product, the method comprising:
(a) weaving an asymmetrical thread density fabric on a multiphase weaving machine by using a high-shrinkage type of warp yarn and a medium-to-low shrinkage type of weft yarn;
(b) finishing the woven by shrinking the lower density threads more than the higher density threads after weaving the asymmetric thread density fabric to create a substantially symmetrical thread density in the fabric; and
(c) creating an airbag from the finished fabric.
25. The method of claim 24 , wherein:
the warp yarn is an 8-14% hot air shrinkage yarn; and
the weft yarn is a 1-5% hot air shrinkage yarn.
26. The method of claim 24 , wherein the step of shrinking comprises hydro-shrinking the asymmetric thread density fabric.
27. The method of claim 24 , wherein the step of shrinking comprises thermo-shrinking the asymmetric thread density fabric.
28. The method of claim 24 , wherein the step of shrinking comprises hydro-shrinking and thermo-shrinking the asymmetric thread density fabric.
29. The method of claim 24 , wherein the step of weaving comprises weaving the fabric on a series shed weaving machine.
30. A method of manufacturing a product, the method comprising:
(a) weaving a fabric with higher density threads in a first direction and lower density threads in substantially perpendicular second direction;
(b) shrinking the lower density more than the higher density threads after weaving;
(c) causing the fabric to have substantially the same density in the first and second directions after the shrinking; and
(d) creating an inflatable safety device from the shrunk and woven fabric.