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light diffuser

A technology of light diffuser and light diffusivity, which is applied in the field of light diffuser, can solve the problems of poor appearance, etc., and achieve the effects of sufficient light transmittance, excellent light resistance, excellent light transmittance and light diffusivity

Inactive Publication Date: 2017-09-29
SEKISUI PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in a lighting fixture using an LED as a light source, for example, a lighting cover as a light diffuser is provided to cover a plurality of LED chips arranged on a substrate, but if the light diffusion by the light diffuser is insufficient, it may The LED chip can be seen through the lighting cover, and the appearance is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] 100 parts by weight of acrylic resin (manufactured by Sumitomo Chemical Co., Ltd., trade name "SUMIPEX (registered trademark) EX") as a base resin, 2.5 parts by weight of acrylic rubber particles as a rubber component (manufactured by Mitsubishi Rayon Corporation, Trade name "METABLEN (registered trademark) W-300A"), 2.0 parts by weight of resin particles (A) with a refractive index of 1.555 obtained by the above-mentioned production method, 2.0 parts by weight (1 part by weight relative to 1 part by weight of resin particles) passed Barium sulfate (sedimentable barium sulfate "B55" manufactured by Sakai Chemical Industry Co., Ltd., with a volume average particle diameter of 0.50 μm measured by the above measurement method, CV value 65.9%, specific surface area 4.13 g / m 2 ) was mixed with a Henschel mixer for 15 minutes to obtain a mixture. The mixture was extruded with a single-screw extruder ("R50" manufactured by Hoshi Plastic K.K.) at a temperature of 210 to 260°C a...

Embodiment 2

[0151] With respect to 100 parts by weight of the base resin, 2.0 parts by weight (1 part by weight relative to 1 part by weight of resin particles) of barium sulfate with a volume average particle diameter of 0.62 μm (sedimentable barium sulfate manufactured by Sakai Chemical Industry Co., Ltd. 300", CV value 59.9%, specific surface area 3.4g / m 2 ) instead of 2.0 parts by weight of barium sulfate with a volume average particle diameter of 0.50 μm (sedimentable barium sulfate "B55" manufactured by Sakai Chemical Industry Co., Ltd., CV value 65.9%, specific surface area 4.13 g / m 2 ), except that, a light-diffusing plate (light-diffusing body) was obtained in the same manner as in Example 1.

Embodiment 3

[0153] With respect to 100 parts by weight of the base resin, 1.5 parts by weight of resin particles (A) were compounded, and further compounded with 2.0 parts by weight (1.33 parts by weight relative to 1 part by weight of resin particles) of barium sulfate ( Sedimentable barium sulfate "300" manufactured by Sakai Chemical Industry Co., Ltd., CV value 59.9%, specific surface area 3.4g / m 2 ) instead of 2.0 parts by weight of barium sulfate with a volume average particle diameter of 0.50 μm (sedimentable barium sulfate "B55" manufactured by Sakai Chemical Industry Co., Ltd., CV value 65.9%, specific surface area 4.13 g / m 2 ), except that, a light-diffusing plate (light-diffusing body) was obtained in the same manner as in Example 1.

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PUM

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Abstract

To provide a light diffuser capable of thinning while ensuring sufficient light transmittance, light diffusivity, and light resistance. A light-diffusing resin composition in which resin particles and an inorganic compound are dispersed in a base resin is molded to obtain a light-diffusing body. The resin particle is a polymer particle formed by a polymer comprising a monomer mixture of (meth)acrylic monofunctional monomer and multifunctional monomer, with a volume average particle diameter of 2-10 μm and a refractive index of 1.540-1.580. The inorganic compound is barium sulfate with a volume average particle diameter of 0.4-0.7 μm. The said light diffusing resin composition contains 1.0-5.0 weight part of said resin particles with respect to 100 weight part of said base material resins. Moreover, the content ratio of the said resin particle and the said inorganic compound in the said light-diffusion resin composition exists in the range of 1:0.20-1:1.35 by weight ratio.

Description

technical field [0001] The present invention relates to a light diffuser having translucency and light diffusivity. Background technique [0002] Conventionally, light diffusers formed of resin compositions containing base resins such as acrylic resins, polycarbonate resins, and styrene resins have been used in lighting fixtures as light diffusers for diffusing light from a light source. objects such as lighting covers that cover light sources. [0003] Conventionally, fluorescent lamps and incandescent lamps have been widely used as light sources for lighting fixtures, but in recent years, LEDs have been gradually used instead of fluorescent lamps and incandescent lamps for the purpose of prolonging their lifespan. Fluorescent lamps and incandescent lamps emit light in all directions, while LEDs emit light forward, and have higher directivity than fluorescent lamps and incandescent lamps. In addition, in a lighting fixture using an LED as a light source, for example, a li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/00C08L25/14C08L33/12C08L25/08C08K3/30
Inventor 石森史高町田和毅
Owner SEKISUI PLASTICS CO LTD
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