Foam sheet for interior material of automobile and interior material of automobile

Abstract

A foam sheet for an interior material of an automobile formable in a specified shape while maintaining excellent sound absorbing performance, characterized in that hole parts opening to the surface thereof are formed in one surface of a denatured polyphenylene ether-based resin foam sheet with a continuous bubble fraction of 50% or higher. Thus, the foam sheet can develop excellent sound absorbing performance by smoothly guiding sound vibration energy to the continuous bubbles in the foam sheet (1) through the hole parts to vibrate the bubble walls of the continuous bubbles so as to transform the vibration energy into thermal energy.

Description

technical field

[0001] The present invention relates to a foam sheet for automobile interior materials used for automobile interior materials such as automobile ceiling materials and door members. Background technique

[0002] Various automobile interior materials have been proposed in the past, and as such automobile interior materials, for example, in Patent Document 1, an automobile interior material composed of a skin material and a foam laminate, wherein the foam laminate has a modified polymer A structure in which non-foamed layers made of thermoplastic resin are laminated on both sides of a foamed layer made of phenylene ether resin as a base resin, and the expansion ratio of the foamed layer exceeds 20 times and is 100 times or less.

[0003] However, the above-mentioned automobile interior material is due to increase the degree of freedom of vibration of the non-foam layer laminated on the foam layer by making the foam layer highly foamed, and thus utilizes the nois...

Images