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Transparent resin composition, resin molded body, lamp cover, lamp cover for vehicles, combination lamp cover, and vehicle

A technology of resin molding and transparent resin, which can be used in lampshades, vehicle parts, road vehicles, etc., can solve the problem of shortening the light guide distance, and achieve the effect of excellent design, excellent visibility, transparency and low presence.

Pending Publication Date: 2019-11-19
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a lampshade having a curved surface, the light incident on the lampshade tends to be emitted from the curved surface and the light guide distance tends to be shortened compared with the use of a light guide plate or a planar light source composed of only a flat shape. With the extension of the light guide distance caused by the recent LED light source and the increase in the size of vehicle components, it is required to maintain high brightness even if the light guide distance becomes longer.

Method used

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  • Transparent resin composition, resin molded body, lamp cover, lamp cover for vehicles, combination lamp cover, and vehicle
  • Transparent resin composition, resin molded body, lamp cover, lamp cover for vehicles, combination lamp cover, and vehicle
  • Transparent resin composition, resin molded body, lamp cover, lamp cover for vehicles, combination lamp cover, and vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0402] 100 parts by mass of methacrylic resin (1) as a transparent resin, and 0.00134 parts by mass of titanium dioxide (1) as a light diffusing agent were supplied to a twin-screw extruder (model name "PCM45", manufactured by Ikegai Co., Ltd. ) was kneaded at 250° C. to obtain a granular transparent resin composition (the content of the light diffusing agent was 13.4 mass ppm). According to the method described above, a plate-shaped test piece (thickness 4 mm x width 50 mm x length 200 mm) was produced from the pellets of the obtained transparent resin composition.

[0403] The obtained test piece was evaluated according to the above-mentioned evaluation method. The evaluation results are shown in Table 2.

Embodiment 2、 comparative example 1～7

[0405] Except having set the kind of light-diffusion agent and the addition amount (content ratio) of a light-diffusion agent to the conditions described in Table 1, it was the same method as Example 1, and the test piece was produced. Table 2 shows the evaluation results of the obtained test pieces.

Embodiment 3、 comparative example 8～11

[0407] Except having set the kind of light-diffusion agent and the addition amount (content ratio) of a light-diffusion agent to the conditions described in Table 1, it was the same method as Example 1, and the test piece was produced. Table 2 shows the evaluation results of the obtained test pieces.

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Abstract

A transparent resin composition which contains a transparent resin and a light diffusing agent that has an average particle diameter of from 220 nm to 300 nm (inclusive). The transparent resin composition is configured such that the content ratio of the light diffusing agent is more than 4.0 ppm by mass but less than 20 ppm by mass relative to the total mass of the transparent resin composition.

Description

technical field [0001] The present invention relates to a transparent resin composition for providing a resin molded article excellent in transparency, brightness, low coloring, and a balance between transparency and brightness. [0002] The present invention relates to a vehicle lamp cover, a combination lamp cover, and a vehicle comprising the above-mentioned resin molded body. [0003] The present invention relates to a lamp cover excellent in transparency, brightness, low coloring, and a balance between transparency and brightness, a combined lamp cover comprising the above lamp cover, and a vehicle. [0004] This application claims priority based on Japanese Patent Application No. 2018-041052 filed in Japan on March 7, 2018, and Japanese Patent Application No. 2018-083828 filed in Japan on April 25, 2018, and the contents thereof are incorporated herein. Background technique [0005] Transparent resins such as methacrylic resins, polycarbonate resins, and polystyrene r...

Claims

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Application Information

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IPC IPC(8): F21V3/06F21S41/20F21S43/20F21V3/00F21V8/00F21Y101/00F21Y103/00F21Y115/10F21Y115/30
CPCF21S41/20F21S43/20F21V3/00F21V3/06C08K2003/2241C08K3/22C08K2201/005C08L33/10C08L69/00C08L25/06F21W2107/10F21S41/285G02B1/045G02B6/0041G02B6/0051
Inventor 濑知洋平泽田忠义大久保贵史
Owner MITSUBISHI CHEM CORP
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