Polyester resin composition and light reflector

A technology of polyester resin and light reflector, which is applied in the direction of chemical instruments and methods, layered products, metal layered products, etc., and can solve the problems of not being able to continuously obtain moldings, impairing reflective metal surfaces, and rising mold temperature gas , to achieve the effect of excellent surface and light reflectivity, reduction of suppression characteristics, and excellent surface appearance

Active Publication Date: 2009-08-05
MITSUBISHI ENG PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, although these methods can improve the appearance of the molded body, the increase in resin temperature and mold temperature will cause the problem of gas (volatile components) during molding.
Such volatile components cause cloudy (foggy) appearance defects on the surface of the molded article, so good molded articles cannot be continuously obtained, and new measures such as grinding and wiping of the mold are required.
Furthermore, in the case of being placed in a high-temperature atmosphere, the reflective metal surface will be affected, that is, there is a problem of turbidity

Method used

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  • Polyester resin composition and light reflector
  • Polyester resin composition and light reflector
  • Polyester resin composition and light reflector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12、 comparative example 1～9

[0154] Fully dry mix polyester resin, modified polyolefin resin, particulate filler and other additives according to the composition in Table 1, and then use a twin-screw extruder whose temperature is set at 250°C to extrude at a speed of 15kg / hour Granulated.

[0155] The obtained pellets were dried at 120°C for 6 hours before injection molding, using an injection molding machine with a clamping pressure of 75 tons, a molding temperature of 265°C, and a mirror mold with a molded body shape of 100mm×100mm×3mm. Molding was performed at 110° C. to obtain a resin molded body. The releasability during injection molding is good, and it can be easily taken out from the molded body.

[0156] Aluminum was vapor-deposited on the surface of the obtained resin molded body without primer treatment so that the thickness of the aluminum film was 140 nm, and an aluminum-deposited light reflector was obtained. In addition, using the above-mentioned pellets, an ISO test piece was molded by a...

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Abstract

A polyester resin composition for light reflector base, causing only a small amount of outgas in the process of molding a light reflector base or producing a light reflector, excellent in adhesiveness with a metal film layer provided to the surface of the light reflector base, and capable of keeping high luminance even when exposed under high-temperature atmospheres will be provided. The polyester resin composition for light reflector base of the present invention, on the surface of which a light reflecting layer is provided, contains (A) 100 parts by weight of polyester resin, and (B) 0.05 to 2 parts by weight of modified polyolefin resin having a weight-average molecular weight of 2,000 or larger, and an acid value of larger than 1 mg KOH / g and smaller than 10 mg KOH / g.

Description

technical field [0001] The present invention relates to a polyester resin composition for a light reflection body base provided with a light reflection layer on the surface, a light reflection body base obtained by molding the polyester resin composition for a light reflection body base, and a light reflection body. Background technique [0002] Light reflectors such as covers, reflectors, extensions in automotive lamps, and home appliance lighting fixtures are required to have high brightness, smoothness, and uniform reflectance for the directionality and reflectivity of the light source , and further, high heat resistance that can withstand heat emitted from a light source, and the like. Therefore, as a light reflector, a metal (metal plate) light reflector has been used, or a thermosetting resin represented by a bulk molding compound (BMC) or a sheet molding compound (SMC) by metal plating. A light reflector in which a metal thin film is provided by processing, vapor dep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00B32B15/09C08K3/00C08K5/49C08L23/30C08L23/26G02B5/08
CPCC08K2201/005C08K5/521C08K3/0033C08L67/02C08L91/06C08K3/013
Inventor 渡利竜也庄司英和降矢寿之
Owner MITSUBISHI ENG PLASTICS CORP
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