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Resin foam sheet and resin foam composite

A resin foam and resin technology, applied in the fields of resin foam composites and resin foam sheets, can solve the problems of poor display and uneven display, and achieve excellent coiling stability, low apparent density, and high thickness. The effect of precision

Active Publication Date: 2014-06-04
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the above-mentioned resin foam with a large resilience during compression is used in the very narrow design gap of such a display device, due to the high resilience, for example, display unevenness may occur in the liquid crystal of the display portion, causing poor display

Method used

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  • Resin foam sheet and resin foam composite
  • Resin foam sheet and resin foam composite
  • Resin foam sheet and resin foam composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0137] The above-mentioned resin foam A is passed through the above-mentioned continuous processing device with the temperature of the induction heating roll set at 160° C. and the gap set at 0.20 mm, thereby heat-melting one side, performing slitting processing, and rolling A resin foam sheet obtained by heat-melting on one side was obtained. It should be noted that the pulling speed was set at 20 m / min.

Embodiment 2）

[0139] The above-mentioned resin foam B is passed through the above-mentioned continuous processing device with the temperature of the induction heating roll set at 160° C. and the gap set at 0.30 mm, whereby one side is melt-processed by heat, slit processing is performed, and thereafter rolled. A resin foam sheet obtained by heat-melting on one side was obtained. It should be noted that the pulling speed was set at 20 m / min.

Embodiment 3）

[0141] The above-mentioned resin foam A is passed through the above-mentioned continuous processing device with the temperature of the induction heating roll set at 160° C. and the gap set at 0.20 mm, thereby heat-melting one side, performing slitting processing, and rolling Taken to obtain a jelly roll. It should be noted that the pulling speed was set at 20 m / min.

[0142] Next, the winding body was unwound and passed through the above-mentioned continuous processing device in which the temperature of the induction heating roll was set to 160° C. and the gap was set to 0.10 mm, so that the unmelted surface (untreated surface) was heated by heat. Surface) melt processing, slit processing, and then coiling to obtain a resin foam sheet with both sides heat-melted. It should be noted that the pulling speed was set at 20 m / min.

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Abstract

Provided is a resin foam sheet that is thin and soft, has a low apparent density, and has excellent stability when rolled (roll stability). The resin foam sheet of the present invention is characterized in that apparent density is between 0.03 and 0.30 g / cm3, compressive stress during 50% compression is 5.0 N / cm2 or less, thickness is between 0.05 mm and 0.40 mm, length is 5 m or longer, and width is 300 mm or wider. The value obtained by the following formula (1) of the resin foam sheet is 25% or less: (thickness tolerance) / (thickness median value) 100 (1)

Description

technical field [0001] The present invention relates to a resin foam sheet and a resin foam composite including the resin foam sheet. Background technique [0002] Resin foams are used as cushioning materials for transportation, heat insulating materials, packaging materials, and building materials, as well as sealing materials and cushioning materials for electronic equipment. In recent years, with the miniaturization of electronic equipment and the increase in size of screens, the area of ​​resin foams used as sealing materials and cushioning materials has also decreased. Resin foams are required to exhibit sufficient sealing properties even with small areas. , Cushioning softness. In addition, electronic devices are also becoming thinner, and the above-mentioned resin foam is also required to be thinner. [0003] As a thin resin foam, foamed sheets obtained by performing compression treatment and stretching treatment during foaming or in a subsequent process, and by app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/36B32B5/18C08J9/04C09J7/26
CPCC08J2323/16C08J9/36C08J9/122B29C44/5654B32B5/18C08J2491/06C08J2323/12C09J7/0289C08J9/0066C08L23/12B29C44/5636C09J7/26Y10T428/249983
Inventor 畑中逸大斋藤诚加藤和通
Owner NITTO DENKO CORP