Shock absorbing material

A technology of shock absorption and impact parts, which is applied in the direction of thin material processing, flexible covering, film/flake adhesive, etc. It can solve the problem of difficulty in obtaining shock absorption, and achieve excellent flexibility and shock absorption. sexual effect

Inactive Publication Date: 2010-09-22
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For conventionally used foam materials, it is difficult to obtain satisfactory impact absorption when the thickness is made thin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] Polypropylene [melt flow rate (MFR) (230°C) 0.35g / 10min] 45 parts by weight, polyolefin elastomer [melt flow rate (MFR) 6g / 10min, JIS A hardness 79°] 55 Parts by weight, 10 parts by weight of magnesium hydroxide, 10 parts by weight of carbon (trade name "Asahi #35" manufactured by Asahicarbon Co., Ltd.), 1 part by weight of monoglyceride stearate, and 2 parts by weight of fatty acid amide (lauric acid bisamide) The mixture was kneaded at a temperature of 200° C. using a twin-screw kneader manufactured by JSW Co., Ltd., extruded into a strand, cooled with water, and formed into pellets. The pellets were put into a single-screw extruder manufactured by Nippon Steel Works Co., Ltd., and carbon dioxide gas was injected at a pressure of 13 (12 after injection) MPa in an atmosphere of 220°C. Carbon dioxide gas was injected at a ratio of 6 parts by weight to 100 parts by weight of the polymer. After the carbon dioxide gas is fully saturated, it is cooled to a temperature suit...

Embodiment 2

[0149] Polypropylene [melt flow rate (MFR) (230°C) 0.35g / 10min] 45 parts by weight, polyolefin elastomer [melt flow rate (MFR) 6g / 10min, JIS A hardness 79°] 55 Parts by weight, 120 parts by weight of magnesium hydroxide, 10 parts by weight of carbon (trade name "Asahi #35" manufactured by Asahicarbon Co., Ltd.), 1 part by weight of monoglyceride stearate, and a biaxial carbon fiber made by Japan Steel Works (JSW) Co., Ltd. Kneading machine, kneading at a temperature of 200°C, then extruded into strips, cooled with water, and shaped into granules. The pellets were put into a single-screw extruder manufactured by Nippon Steel Works Co., Ltd., and carbon dioxide gas was injected at a pressure of 13 (12 after injection) MPa in an atmosphere of 220°C. Carbon dioxide gas was injected at a ratio of 6 parts by weight to 100 parts by weight of the polymer. After the carbon dioxide gas is fully saturated, it is cooled to a temperature suitable for foaming, and then extruded from a mold...

Embodiment 3

[0151] Polypropylene [melt flow rate (MFR) (230°C) 0.35g / 10min] 45 parts by weight, polyolefin elastomer [melt flow rate (MFR) 6g / 10min, JIS A hardness 79°] 55 Parts by weight, 10 parts by weight of magnesium hydroxide, 10 parts by weight of carbon (trade name "Asahi #35" manufactured by Asahicarbon Co., Ltd.), 1 part by weight of monoglyceride stearate, and 2 parts by weight of fatty acid amide (lauric acid bisamide) It was kneaded at a temperature of 200° C. using a twin-screw kneader manufactured by Japan Steel Works (JSW), and then extruded into strips, cooled with water, and formed into pellets. The pellets were put into a single-screw extruder manufactured by Nippon Steel Works Co., Ltd., and carbon dioxide gas was injected at a pressure of 13 (12 after injection) MPa in an atmosphere of 220°C. Carbon dioxide gas was injected at a ratio of 6 parts by weight to 100 parts by weight of the polymer. After the carbon dioxide gas is fully saturated, it is cooled to a temperat...

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Abstract

The present invention relates to an impact-absorbing material including a foam having a thickness of from 0.1 to 1.0 mm, an average cell size of from 10 to 65 [mu]m and a density of from 0.01 to 0.20 g / cm3 and having an impact-absorbing property, as defined in the following expression (1), of from 40 to 90%: Impact-absorbing property (%)=(F0-F1) / F0100 (1), in which F0 represents an impact force at the time of making an impactor collide with only a support plate; and F1 represents an impact force at the time of making an impactor collide with a support plate of a structure composed of the support plate and the impact-absorbing material.

Description

technical field [0001] The present invention relates to a shock-absorbing material exhibiting excellent shock-absorbing properties. Background technique [0002] In the past, image display components fixed in image display devices such as liquid crystal displays, electroluminescence displays, and plasma displays, and optical components such as cameras and lenses fixed in so-called "mobile phones" and "portable information terminals" A foam material is used when the component is fixed to a predetermined location (fixed part, etc.). As such a foam material, in addition to using a low-foaming and closed-cell structure fine-cell urethane foam and a high-foaming urethane compression-molded material, a foam ratio with closed cells is also used. About 30 times the polyethylene foam, etc. Specifically, using, for example, a density of 0.3 to 0.5g / cm 3 Gaskets made of polyurethane foam (see Japanese Patent Laid-Open No. 2001-100216), sealing materials for electrical and electronic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08L23/00C08L23/12C08J9/12C09J7/26
CPCG02F2201/503C08J2201/03C09J2423/006C08L23/16C08J2203/06C08L23/12C08J2323/12C09J7/0289C08J2203/08C08L2203/14C09J2433/00C08J9/122C09J7/26Y10T428/249983C08L2666/06B65D65/42B65D81/02
Inventor 加藤和通斋藤诚藤井浩喜畑中逸大
Owner NITTO DENKO CORP
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