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Light diffuser

A light diffuser and light diffusivity technology, applied in lighting and heating equipment, lighting devices, lighting device parts and other directions, can solve problems such as poor appearance, and achieve full light transmittance, excellent light transmittance and light diffusivity. , the effect of excellent light fastness

Inactive Publication Date: 2014-03-26
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

[0131] 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 production method, 2.0 parts by weight (1 part by weight to 1 part by weight of resin particles) by 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 and a discharge rate of ...

Embodiment 2

[0134] 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. B300", 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

[0136] With respect to 100 parts by weight of the base resin, 1.5 parts by weight of resin particles (A) were compounded, and 2.0 parts by weight (1.33 parts by weight relative to 1 part by weight of resin particles) of barium sulfate ( Precipitable barium sulfate "B300" 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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Abstract

The invention provides a light diffuser which can guarantee full light transmission, light diffusion and light resistance and can be thinned. The light diffuser can be manufactured with a light diffusion resin composition dispersed with resin particles and an inorganic compound in base material resin. The resin particles are polymer particles formed by polymer of a monomer mixture containing a (meta)acrylic acid single-function monomer and a multi-function monomer and having the volume average particle size of 2-10 microns and the refractive index of 1.540-1.560. The inorganic compound is barium sulfate with the volume average particle size of 0.4-0.7 microns. 1.5-2.5 weight parts of the resin particles are included with respect to 100 weight parts of the light diffusion resin composition. Besides, the content ratio of the resin particles to the inorganic compound in the light diffusion resin composition, by weight, ranges from 1:0.5-1:1.35.

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. (for example, a lighting cover that covers the light source). [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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/00C08L33/12C08L25/14C08K3/30F21V3/04
Inventor 石森史高
Owner SEKISUI PLASTICS CO LTD
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