Thermoplastic resin foam

A thermoplastic resin and foam technology, used in flat products, household appliances, other household appliances, etc., can solve the problem of delaying the deterioration rate of resin products, and achieve the effect of enhancing UV resistance, inhibiting discoloration, and reducing the amount of resin.

Inactive Publication Date: 2012-07-04
FURUKAWA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the invention of Japanese Patent Laying-Open No. 12-85037 is not intended to delay the degradation rate of the resin product itself due to ultraviolet rays.

Method used

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  • Thermoplastic resin foam
  • Thermoplastic resin foam
  • Thermoplastic resin foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Polyethylene terephthalate (GRADE: C-0312, manufactured by UNITIKA Co., Ltd.) was molded into a sheet having a thickness of 0.6 mm×a width of 300 mm×a length of 60 m. Make this resin sheet and 160 μm thick * 290mm wide * 60m long, basis weight 55g / m 2 Separators of olefin-based nonwoven fabric (GRADE: FT300, manufactured by Nippon Belloyer Co., Ltd.) were stacked and rolled into a roll so that there was no part where the surfaces of the resin sheets were in contact with each other. Then, this roll was placed in a pressure vessel, and the pressure was increased to 6 MPa with carbon dioxide gas, so that the carbon dioxide gas was permeated into the resin sheet. The permeation time of carbon dioxide gas into the resin sheet was 72 hours. Then, the reel was taken out from the pressure vessel, the spacer was removed, and only the resin sheet was continuously supplied to a hot-air circulation foaming furnace set at 220° C., and foaming was performed at a foaming time of 1 mi...

Embodiment 2

[0061] To polyethylene terephthalate (GRADE: C-0312, manufactured by UNITIKA Co., Ltd.), a masterbatch (NANOMAXEZ153, manufactured by Showa Denko) containing an inorganic oxide filler (zinc oxide) having ultraviolet shielding properties is added, The filler content was adjusted to 0.5 parts by mass, kneaded, and then formed into a thin sheet with a thickness of 0.6 mm x a width of 300 mm x a length of 60 m, and the sheet was foamed under the same conditions as in Example 1.

[0062] The obtained foam foamed uniformly and had an average cell diameter of 7 μm, which was very fine. The thickness of the foam was 1.0 mm, and the average reflectance of the foam showed a high value of 97.8%. In the same manner as in Example 1, only 0.2 mm of the surface layer of the foam was removed. The unevenness of the surface of the foam was confirmed and d was measured, and d was 8 μm. In addition, the ultraviolet resistance of the foam was evaluated, and the result of ΔE * It is 10.4, and th...

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Abstract

To provide a thermoplastic resin foam, which has both a high reflectance and resistance to ultraviolet light and is suitable as light reflecting plates, for example, for decorative illumination signboards, lighting equipment, backlight of displays, and lighting boxes. A thermoplastic resin foam in which at least one surface has a large number of fine concaves and convexes (10), (12) and a requirement represented by 0.01 [mu]m<=d<=20 [mu]m is satisfied wherein d represents at least one value of the average value of the distance between adjacent convexes and the average value of the distance between adjacent concaves.

Description

technical field [0001] The present invention relates to a thermoplastic resin foam, and more specifically, to a flaky thermoplastic resin foam having many fine irregularities on the surface. The thermoplastic resin foam of the present invention can be imparted with UV-resistant properties without greatly increasing the cost even if a resin that is easily deteriorated by ultraviolet rays is used, so it is suitable for use in signboards, lighting fixtures, backlights of displays, and lighting boxes and other light reflectors. Background technique [0002] In the past, as a light reflection plate used in light box billboards, lighting fixtures, display backlights, lighting boxes, etc., it has been proposed to process a synthetic resin film or sheet for reflecting light into a three-dimensional light reflection plate ( See, for example, Japanese Patent Application Laid-Open No. 2002-122863). [0003] The light emitted from light sources used in light box billboards, lighting f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/36B29C44/00B29C59/00B29L7/00
CPCB29C2059/023C08J9/36B29C44/5654B29D11/00605
Inventor 增田幸治伊藤正康
Owner FURUKAWA ELECTRIC CO LTD
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