Crash pad for vehicles and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9744931-B2
Application number	US-201514633017-A
Country	US
Kind code	B2
Filing date	Feb 26, 2015
Priority date	Mar 5, 2014
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

The present invention relates to a crash pad for vehicles and a method for preparing the same, and more specifically, a crash pad for vehicles comprising a skin layer forming the outer surface of the crash pad provided with an air-bag module for vehicles; a foaming layer in intimate contact with the lower surface of the skin layer; and a core layer in intimate contact with the lower surface of the foaming layer to form an inner surface, wherein the skin layer has a tensile strength of about 10 to about 100 kgf/cm 2 and an elongation at break of about 50 to about 600% according to JIS K6301 method when it has a layer thickness of about 0.2 mm to about 1.0 mm.

First claim

What is claimed is:

1. A crash pad for a vehicle, the crash pad comprising:
a skin layer providing an outer surface of the crash pad;
a foam layer formed under the skin layer and contacting the skin layer; and
a core layer formed under the foam layer such that the foam layer is interposed between the skin layer and the core layer, the core layer comprising a top surface facing the skin layer,
wherein the core layer comprises an opening formed through the top surface for deploying an airbag therethrough toward the skin layer,
wherein the skin layer in the form of a single, continuous layer is made of a homogeneous material which covers the top surface and the opening,
wherein the skin layer does not comprise an opening corresponding to the opening of the core layer, wherein the skin layer has no score formed therein,
wherein the skin layer has a thickness of about 0.2 mm to about 1.0 mm, a tensile strength of about 10 to about 100 kgf/cm2 and an elongation at break of about 50 to about 600% according to JIS K6301 method.

2. The crash pad according to claim 1 , wherein the core layer includes an opening for Passenger Air-Bag (PAB) door, the opening is in a shape selected from the group consisting of an X shape, a modified X shape, a bar shape, an H shape, and a U shape.

3. The crash pad according to claim 1 , wherein the skin layer is formed from a thermoplastic elastomer having a shore A hardness of about 55 to about 99 according to ASTM D2240 method.

4. The crash pad according to claim 1 , wherein the skin layer comprises at least one selected from the group consisting of olefinic resins, urethane resins, acrylic resins, styrenic resins, ester resins, amide resins, vinyl acetate resins and polyvinyl chloride resins.

5. The crash pad according to claim 1 , wherein the skin layer is selected from the group consisting of a Powder Slush Molded (PSM) layer, a Male & Female Vacuum Formed layer, a spray-processed layer, and an injection molded layer.

6. The crash pad according to claim 1 , further comprising a foam sheet laminated over the skin layer.

7. The crash pad according to claim 6 , wherein the foam sheet comprises an olefin elastomer.

8. The crash pad according to claim 7 , wherein the foam sheet further comprises at least one selected from the group consisting of thermoplastic styrene elastomer; thermoplastic urethane elastomer; thermoplastic ester elastomer; thermoplastic amide elastomer; and thermoplastic vinyl acetate elastomer.

9. The crash pad according to claim 6 , wherein the foam sheet is expandable at an expansion ratio of about 5 to about 50, and has a thickness of about 0.5 mm to about 4.0 mm.

10. The crash pad according to claim 1 , further comprising a coating layer formed on the skin layer, wherein the coating layer comprises at least one of chlorinated polypropylene resins, acrylic resins and urethane resins.

11. The crash pad according to claim 10 , wherein the coating layer has a thickness of about 0.01 mm to about 0.2 mm.

12. The crash pad according to claim 1 , wherein the foam layer comprises a polyurethane resin, and has a thickness of about 3 mm to about 12 mm.

13. A method for preparing the crash pad of claim 1 , comprising:
providing the core layer in a male die;
providing the skin layer in a female die;
arranging the female die and the male die such that the top surface of the core layer faces the skin layer;
injecting a foaming liquid between the core layer and the skin layer;
closing and heating a foaming mold of the male die and the female die to form a foaming layer; and
de-molding the crash pad comprising the core layer, the foaming layer and the skin layer which are integrated,
wherein the skin layer is not subjected to a skin scoring process.

Assignees

• Hyundai Mobis Co Ltd

Inventors

• Son Chang Wan
• Lee Hea Yeon
• Chun Yong
• Kim Hyeon Don

Classifications

• B29K2101/12

  Thermoplastic materials · CPC title

• B60R21/045 Primary

  associated with the instrument panel or dashboard · CPC title

• B29K2075/00

  Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof}, as moulding material · CPC title

• B60R21/04 Primary

  Padded linings for the vehicle interior {; Energy absorbing structures associated with padded or non-padded linings} · CPC title

• B29C45/14467

  Joining articles or parts of a single article (B29C45/14377, B29C45/14385, B29C45/14581, B29C45/14614 and B29C45/006 take precedence) · CPC title