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Excellent light transmission diffusibility synthetic resin formed product

A synthetic resin, diffusive technology, used in optics, optical components, diffusing components, etc., to achieve excellent industrial productivity, easy demolding, good balance of light transmittance and light diffusion properties

Inactive Publication Date: 2004-06-16
KURARAY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] The object of the present invention is to overcome the existing problems and provide a synthetic resin molded product that has no appearance problems, is easy to release the molded product, has excellent repeatability, and has high light diffusivity and high light transmittance.

Method used

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  • Excellent light transmission diffusibility synthetic resin formed product
  • Excellent light transmission diffusibility synthetic resin formed product
  • Excellent light transmission diffusibility synthetic resin formed product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0112] The present invention will be described in more detail below by way of examples, but the present invention is not limited to these examples.

[0113] Evaluations in Examples were performed by the following methods.

[0114] (1) Surface shape

[0115] The average height Rz of the shape model ( FIG. 1 ) was measured in accordance with JIS B0601-1994 using a universal surface shape measuring device SE-3C manufactured by Kosaka Laboratories Co., Ltd. The interval (pitch) P between the peaks was measured using an optical microscope manufactured by Nippon Kogyo Co., Ltd. and an image analysis optical microscope manufactured by Keyence Co., Ltd. Microfield VH-8000. The inclination angle θ of the concavo-convex was measured with an ultra-deep shape microscope (laser microscope) VF-7500 manufactured by Keyence Co., Ltd.

[0116] (2) Evaluation of release properties

[0117] After the synthetic resin molded plate molded by casting polymerization was cooled to room temperature,...

example 1

[0138] Example 1 (embodiment)

[0139] (1) Production of molded glass

[0140] A glass plate with a thickness of 10 mm was dipped in a fluorine-based acid etchant [Glass Matting Agent Lerite SX-20 manufactured by SEPPIC (France)] for 60 seconds at room temperature and washed with water to produce a mold glass having a desired surface shape.

[0141] (2) Face them so that the surface formed with the desired surface shape is on the inside, sandwich a soft vinyl chloride resin gasket (gasket) so that the gap is 2 mm, and assemble it into a glass cell.

[0142] Then, 100 parts by weight of methyl methacrylate partial polymer, 0.1 part by weight of 2,2'-azobisisobutyronitrile, 0.03 parts by weight of 2-(2'-hydroxy-5-methylphenyl)benzotriazole parts by weight, 0.1 parts by weight of stearic acid. The slurry was poured into a glass tank, heated and polymerized in 60°C warm water for 2 hours, and heated in a 120°C furnace for 2 hours. After cooling, the glass tank is peeled off to ...

example 2

[0144] Example 2 (embodiment)

[0145] Using the molded glass used in Example 1, face it so that the surface formed with the desired surface shape is on the inside, sandwich a soft vinyl chloride resin gasket so that the gap is 2 mm, and assemble it into a glass cell .

[0146] Then, 5 parts by weight of commercially available silicone beads were mixed with 20 parts by weight of methyl methacrylate, and mixed and stirred for 15 minutes. Thereafter, 68.5 parts by weight of methyl methacrylate partial polymer, 7.0 parts by weight of neopentyl glycol dimethacrylate, and 0.03 parts by weight of 2-(2'-hydroxy-5-methylphenyl)benzotriazole were added. 0.01 parts by weight of stearic acid, 0.1 parts by weight of 2,2'-azobis(2,4-dimethylvaleronitrile) and 1,1-bis(tert-butyl peroxide)-3,3,5 - 0.1 part by weight of trimethylcyclohexane, stirred for 30 minutes. The slurry was poured into a glass tank, heated and polymerized in 60°C warm water for 2 hours, and heated in a 120°C furnace ...

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Abstract

Provided is a synthetic resin molded article which is easily removed from a mold, excellent in light transmission/diffusion while excellent repeated moldability is obtained. An irregularity form is formed on at least one side face of the light transmission/diffusion synthetic resin molding, and the tilt angle [theta] of the irregularity form is 20 to 60 degrees.

Description

technical field [0001] The present invention relates to a synthetic resin molded product suitable for members having both properties of light transmission and diffusion, such as front panels of various displays, lighting covers and signboards, and light diffusion plates for backlights of liquid crystal displays. Background technique [0002] Various displays, lighting covers, signboards (signage boards), light diffusion plates for backlights of liquid crystal displays, etc., are required to be uniformly bright (high brightness) over the entire surface as a basic function. In recent years, displays of various types have been launched on the market, and the images thereof have become increasingly high-definition, high-brightness, and large-scale. The actual situation is that the illumination light sources used for these various displays, lighting covers, signboards, liquid crystal displays, etc. are increasingly advancing in high luminosity. These illuminating light sources a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18G02B5/02
CPCC08G77/12C08J5/18C08J2383/04C08L83/04G02B5/0268
Inventor 五十岚孝雄杉山刚山口繁雄板垣正美大沼重雄望月明广
Owner KURARAY CO LTD
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