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Light-reflecting sheet

A technology of light reflection and foam sheet, which is applied in optics, optical components, electronic equipment, etc., can solve the problems of thermoformability, productivity, and inability to form bubbles, etc., and achieve excellent thermoformability and small reflection difference , Thin effect

Inactive Publication Date: 2015-03-25
JSP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology cannot form fine bubbles without batch foaming, and there are still problems in productivity and thermoformability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] The following examples and comparative examples illustrate the present invention in more detail, but the present invention is not limited to the following examples. The following raw materials were used in Examples and Comparative Examples.

[0112] (1) The polystyrene resins used in Examples 1 to 18 and Comparative Examples 1 to 5 were polystyrene resin GX154 (MFR 1.6 g / 10min, hereinafter abbreviated as GPPS1) produced by PS Japan Co., Ltd. and PS Japan Co., Ltd. The produced polystyrene resin 679 (MFR 18g / 10min, hereinafter referred to as GPPS2) is a mixed resin mixed in a weight ratio of 50:50.

Embodiment 19

[0113] The polystyrene resin used in Example 19 was 100 parts by weight of methacrylic acid copolymer styrene resin G9001 (MFR 1.7g / 10min, hereinafter referred to as PSM1) produced by PS Japan and benzene produced by JSR. A mixed resin composed of 8.4 parts by weight of vinyl elastomer TR2000 (MFR 13g / 10min, hereinafter referred to as SER1) and 20 parts by weight of PS Japan 679 (MFR 18g / 10min, hereinafter referred to as GPPS2).

Embodiment 20

[0114] The polystyrene resin used in Example 20 was 100 parts by weight of poly-α-methylstyrene resin R431 (MFR 0.2 g / 10 minutes, hereinafter referred to as PSα) produced by Asahi Kasei Co., Ltd. and produced by JSR Corporation. A mixture of 8.4 parts by weight of styrene-based elastomer TR2000 (MFR 13g / 10min, hereinafter referred to as SER1) and 20 parts by weight of PS Japan polystyrene resin 679 (MFR 18g / 10min, hereinafter referred to as GPPS2) resin.

[0115] The measurement of the melt flow rate (MFR) was carried out under the conditions of a test temperature of 200° C. and a load of 5 kg in accordance with the condition H of JIS K 7210.

[0116] (2) Titanium oxide having a rutile structure and an average particle diameter of 230 nm was used. A masterbatch containing 70 wt% titanium oxide was formed using GPPS2. The obtained master batch is used in an amount to achieve the required compounding amount of titanium oxide.

[0117] (3) Perfluorobutanesulfonate (manufacture...

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Abstract

A light-reflecting sheet comprising a polystyrene-based resin foamed sheet having an apparent density of 0.08 to 0.9 g / cm3 and a thickness of 0.1 to 3 mm, wherein the foamed sheet comprises titanium oxide at a weight of (A) per square metre of said foamed sheet, and has an average bubble diameter in the thickness direction thereof of 1 to 50 mum, and a bubble count (B) in the thickness direction thereof, where A and B satisfy the expressions 3 <=A <= 70, B >= 20, and B >= 60 - 1.5 * A.

Description

technical field [0001] The present invention relates to a light reflection sheet, and more specifically, to a light reflection sheet composed of a polystyrene resin foam sheet. Background technique [0002] Conventionally, light reflecting materials have been used in order to improve the utilization efficiency of light. For example, a light-reflecting material is provided on the backmost side of a liquid crystal TV to reflect light from a light source such as an LED or a cold cathode fluorescent lamp (CCFL) to the front with good efficiency. In addition, light reflecting materials are also mounted on fluorescent lamps or LED type lighting devices to reflect light with good efficiency. [0003] With the recent demand for energy saving, further improvement of the light utilization efficiency of the above-mentioned light reflecting material is required. Therefore, attempts are currently being made to improve the light reflectivity. Furthermore, when light-reflecting material...

Claims

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Application Information

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IPC IPC(8): G02B5/08B29C47/00C08J9/12B29K25/00B29K105/04B29L7/00B29C48/08B29C48/18B29C48/405
CPCB29C48/08B29C48/0012B29C48/18C08J9/0061C08J9/0066C08J9/122G02B5/0808C08J2205/044C08J2201/03C08J2203/06C08J2325/16C08J2325/06C08J2325/08C08J2425/02B29K2825/06B32B27/065B32B2266/0228B32B2307/416B32B2457/00B32B2457/20B29C48/405C08J9/00G02B5/08
Inventor 伊泽理小泉达哉木野彻
Owner JSP CORP