Method of manufacturing laminate, laminate, and airbag

Patent metadata

Field	Value
Publication number	US-11667259-B2
Application number	US-201816621424-A
Country	US
Kind code	B2
Filing date	Jun 15, 2018
Priority date	Jun 16, 2017
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

A method of manufacturing a laminate including a fabric and a thermoplastic film, wherein the thermoplastic film is a multilayer film including an adhesive layer including a thermoplastic polyester elastomer and a barrier layer that is bonded to the adhesive layer, and that has a melting point that is higher than a melting point of the adhesive layer, and that includes a polymer, and wherein the fabric includes a polyester, the method including a step of adhering a side of the multilayer film with the adhesive layer to the fabric, while heating the multilayer film at a temperature below the melting point of the barrier layer.

First claim

The invention claimed is:

1. A method of manufacturing a laminate including a fabric that includes a polyester of polyethylene terephthalate of yarn, the yarn having a total fineness of 470 dtex and a weave density of 22 pcs/cm, and a thermoplastic film, the thermoplastic film being a multilayer film that includes an adhesive layer including a thermoplastic polyester elastomer; and a barrier layer that is bonded to the adhesive layer, that has a melting point that is higher than a melting point of the adhesive layer, and that includes a thermoplastic polyester polymer, the method comprising:
adhering a side of the multilayer film with the adhesive layer to the fabric, while heating the multilayer film at a temperature of 150° C. and while pressurizing to 18 N/cm 2 , wherein
the thermoplastic polyester elastomer included in the adhesive layer is a block copolymer including a soft segment including a polyether and a hard segment including a polyester, and wherein
the thermoplastic film is made by melting the adhesive layer and the barrier layer, forming a melted adhesive layer and a melted barrier layer, and then the melted adhesive layer and the melted barrier layer are extruded and molded simultaneously by coextrusion to form the thermoplastic film.

2. The method of manufacturing the laminate according to claim 1 , wherein the fabric is a fabric used for an airbag.

3. The method of manufacturing the laminate according to claim 1 , wherein the melting point of the barrier layer is higher than the melting point of the adhesive layer by 20° C. or more.

4. A laminate comprising:
a fabric that includes a polyester of polyethylene terephthalate of yarn, the yarn having a total fineness of 470 dtex and a weave density of 22 pcs/cm; and
a thermoplastic film, the thermoplastic film being a multilayer film including
an adhesive layer including a thermoplastic polyester elastomer; and
a barrier layer that is bonded to the adhesive layer, that has a melting point that is higher than a melting point of the adhesive layer, and that includes a thermoplastic polyester polymer, wherein
the thermoplastic polyester elastomer included in the adhesive layer is a block copolymer including a soft segment including a polyether and a hard segment including a polyester,
a side of the multilayer film with the adhesive layer is adhered to the fabric, while heating the multilayer film at a temperature of 150° C. and while pressurizing to 18 N/cm 2 and wherein
the thermoplastic film is made by melting the adhesive layer and the barrier layer, forming a melted adhesive layer and a melted barrier laver, and then the melted adhesive layer and the melted barrier layer are extruded and molded simultaneously by coextrusion to form the thermoplastic film.

5. An airbag formed from a laminate comprising:
a polyester of polyethylene terephthalate of yarn, the yarn having a total fineness of 470 dtex and a weave density of 22 pcs/cm; and
a thermoplastic film, the thermoplastic film being a multilayer film including
an adhesive layer including a thermoplastic polyester elastomer; and
a barrier layer that is bonded to the adhesive layer, that has a melting point that is higher than a melting point of the adhesive layer, and that includes a thermoplastic polyester polymer, wherein
the thermoplastic polyester elastomer included in the adhesive layer is a block copolymer including a soft segment including a polyether and a hard segment including a polyester.
a side of the multilayer film with the adhesive layer is adhered to the fabric, while heating the multilayer film at a temperature of 150° C. and while pressurizing to 18 N/cm 2 , and wherein
the thermoplastic film is made by melting the adhesive layer and the barrier layer, forming a melted adhesive layer and a melted barrier laver, and then the melted adhesive layer and the melted barrier layer are extruded and molded simultaneously by coextrusion to form the thermoplastic film.

Assignees

• Zf Automotive Germany Gmbh

Inventors

• Yamada Yosuke
• Tagami Toru
• Ludwig Michael

Classifications

• B32B2262/0253

  Polyolefin fibres · CPC title

• B60R2021/23533

  characterised by the manufacturing process · CPC title

• B32B2262/0276

  Polyester fibres · CPC title

• B32B2367/00

  Polyesters, e.g. PET, i.e. polyethylene terephthalate · CPC title

• B32B2605/08

  Cars · CPC title