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

A thin-film, built-in technology, applied in the direction of sound-producing instruments, instruments, etc., can solve problems such as the influence of vibration degrees of freedom

Inactive Publication Date: 2006-09-13
SEKISUI PLASTICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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 noise interference effect generated by the vibration of the non-foam layer, so that It exhibits sound-absorbing performance, so there are many problems as follows. For example, the degree of freedom of vibration of the non-foam layer is affected by the molding shape of the automotive interior material, and the sound-absorbing performance changes according to the molding shape of the automotive interior material. A certain sound absorption performance, or if you want to maintain a certain sound absorption performance, you need to limit the molding shape of the automotive interior material

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0195] 50 parts by weight of a mixture of polyphenylene ether and polystyrene resin (manufactured by GE Plastics, trade name "NORYL EFN4230", polyphenylene ether: 70% by weight, polystyrene resin: 30% by weight) and polystyrene (Trade name "HRM-26" manufactured by Toyo Styrene Co., Ltd.) 50 parts by weight are mixed to form a modified polyphenylene ether resin (polyphenylene ether component: 35 wt%, polystyrene resin component: 65 wt%, glass transition Temperature: 132°C), the modified polyphenylene ether resin and 0.65 parts by weight of talc were supplied to the first extruder for melt kneading, and at the same time, 35% by weight of isobutane and normal 3.9 parts by weight of a volatile blowing agent composed of 65% by weight of butane, melted and kneaded at 300° C., and then continuously supplied molten resin to the second extruder connected to the top of the first extruder After adjusting the resin temperature to 206° C., the molten resin was extruded in a cylindrical sha...

Embodiment 2

[0201] A mixture of polyphenylene ether and polystyrene resin (trade name "NORYL EFN4230" manufactured by GE Plastics, polyphenylene ether: 70% by weight, polystyrene resin: 30% by weight), polystyrene (Toyo Styrene Modified polyphenylene ether resin (glass transition temperature Tg: 116°C) composed of high-impact polystyrene (trade name "E641N" manufactured by Toyo Styrene Co., Ltd.) and as a coloring Carbon black masterbatch (mastre batch) (Dainippon Seika Co., Ltd. product name "PS-M SSC 98H822A", carbon black: 40% by weight) was mixed so that the polyphenylene ether component was 20% by weight, and the styrene-based The resin component was 77.6% by weight, the rubber component was 2% by weight, and the carbon black was 0.4% by weight, and the mixed resins were simultaneously supplied to two extruders.

[0202] Thereafter, the modified polyphenylene ether-based resin sheet in a molten state immediately after being extruded from one of the two extruders was laminated on the ...

Embodiment 3

[0207] A mixture of polyphenylene ether and polystyrene resin (trade name "NORYL EFN4230" manufactured by GE Plastics, polyphenylene ether: 70% by weight, polystyrene resin: 30% by weight), polystyrene (Toyo Styrene Modified polyphenylene ether resin (glass transition temperature Tg: 113°C) composed of high-impact polystyrene (trade name "E641N" manufactured by Toyo Styrene Co., Ltd.) and as a coloring Carbon black masterbatch (trade name "PS-M SSC 98H822A" manufactured by Dainippon Seika Co., Ltd., carbon black: 40% by weight) was mixed so that the polyphenylene ether component was 16.8% by weight and the styrene-based resin component was 81.2% by weight. % by weight, the rubber component was 2.6% by weight, and the carbon black was 0.4% by weight, and the mixed resins were simultaneously supplied to two extruders.

[0208]On the other hand, except that the volatile foaming amount was specified as 3.5 parts by weight instead of 3.9 parts by weight, the temperature of the resi...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/16
Inventor 山口胜己上野裕之定国浩行松浦昭博杉村英夫出口英幸
Owner SEKISUI PLASTICS CO LTD
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