Laminated inflatable vehicle occupant protection device construction

• US 20080169631A1
• Filed: 01/17/2007
• Published: 07/17/2008
• Est. Priority Date: 01/17/2007
• Status: Abandoned Application

• Current Assignee: TRW Vehicle Safety Systems Incorporated (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: TRW Vehicle Safety Systems Incorporated (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Hill, Bruce R.
• Application Number:
  US11/654,335
• Publication Number:
  US 20080169631A1
• Time in Patent Office: Days
• US Class Current: 280/743.1
• CPC Class Codes: B60R 2021/23514 coated fabric
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge
• CPC Class Codes: B60R 21/235 characterised by their material

Abstract

An inflatable vehicle occupant protection device (14) includes a one piece woven substrate (102) that defines an inflatable volume (60) of the protection device. Permeability reducing layers (100) are applied to an outer surface (110) of the substrate (102). The permeability reducing layers (100) include a first permeability reducing layer (100) comprising an adhesive film (104) extruded onto the outer surface (110) of the substrate (102) and a second permeability reducing layer (106) applied over the adhesive film.

Claims

1. An inflatable vehicle occupant protection device comprising:

a one piece woven substrate that defines an inflatable volume of the protection device, and permeability reducing layers applied to an outer surface of the substrate, the permeability reducing layers comprising;

a first permeability reducing layer comprising an adhesive film extruded onto the outer surface of the substrate; and

a second permeability reducing layer applied over the adhesive film.

2. The inflatable vehicle occupant protection device recited in claim 1, wherein the second permeability reducing layer comprises a pre-formed film laminated over the adhesive film.

3. The inflatable vehicle occupant protection device recited in claim 2, wherein the pre-formed film has a higher melt temperature than the adhesive film.

4. The inflatable vehicle occupant protection device recited in claim 2, wherein the adhesive film comprises an extrusion grade urethane.

5. The inflatable vehicle occupant protection device recited in claim 2, wherein the adhesive film comprises a polyether polyurethane.

6. The inflatable vehicle occupant protection device recited in claim 5, wherein the adhesive film has a glass transition point of about −

40°

C. and a melt temperature of about 190°

C.

7. The inflatable vehicle occupant protection device recited in claim 5, wherein the adhesive film is extruded onto the substrate with a thickness in the range of about 35-50 μ

m.

8. The inflatable vehicle occupant protection device recited in claim 5, wherein the adhesive film is extruded onto the substrate with a weight of about 40-57 g/m².

9. The inflatable vehicle occupant protection device recited in claim 2, wherein the pre-formed film comprises a pre-formed co-polyester film.

10. The inflatable vehicle occupant protection device recited in claim 9, wherein said pre-formed co-polyester film has a thickness of about 15 μ

m.

11. The inflatable vehicle occupant protection device recited in claim 9, wherein the pre-formed co-polyester film has a glass transition temperature of about −

60°

C. and a melt temperature of about 220°

C.

12. The inflatable vehicle occupant protection device recited in claim 1, wherein the second permeability reducing layer comprises a coating applied over the adhesive film.

13. The inflatable vehicle occupant protection device recited in claim 12, wherein the adhesive film comprises an extrusion grade urethane.

14. The inflatable vehicle occupant protection device recited in claim 12, wherein the adhesive film comprises one of a polyether polyurethane and a polyester polyurethane.

15. The inflatable vehicle occupant protection device recited in claim 12, wherein the adhesive film has a glass transition point of about −

35°

C. and a Vicat softening point of about 80°

C.

16. The inflatable vehicle occupant protection device recited in claim 12, wherein the adhesive film is extruded onto the substrate with a thickness in the range of about 35-50 μ

m.

17. The inflatable vehicle occupant protection device recited in claim 12, wherein the adhesive film is extruded onto the substrate with a weight of about 40-57 g/m².

18. The inflatable vehicle occupant protection device recited in claim 12, wherein the coating comprises a polyether polyurethane coating.

19. The inflatable vehicle occupant protection device recited in claim 18, wherein the polyether polyurethane coating has a viscosity of about 15,000-30,000 centipoise.

20. The inflatable vehicle occupant protection device recited in claim 18, wherein the polyether polyurethane coating is applied with a weight of about 10-15 g/m².

21. The inflatable vehicle occupant-protection device recited in claim 12, wherein the coating comprises a silicon coating.

22. The inflatable vehicle occupant protection device recited in claim 12, wherein the coating comprises a co-polyester coating.

23. An inflatable vehicle occupant protection device comprising:

a one piece woven substrate that defines an inflatable volume of the protection device, and permeability reducing layers applied to an outer surface of the substrate, the permeability reducing layers comprising;

an adhesive film extruded onto the outer surface of the substrate; and

a pre-formed film laminated onto the extruded adhesive film.

24. An inflatable vehicle occupant protection device comprising:

a one piece woven substrate that defines an inflatable volume of the protection device, and permeability reducing layers applied to an outer surface of the substrate, the permeability reducing layers comprising;

an adhesive film applied to the outer surface of the substrate; and

a coating coated over the adhesive film.

25. The inflatable vehicle occupant protection device recited in claim 24, wherein the adhesive film comprises an extruded adhesive film.

26. The inflatable vehicle occupant protection device recited in claim 24, wherein the adhesive film comprises a pre-formed adhesive film.