Resin composition and illuminating lamp shade made of the same

A technology of resin composition and components, which is applied in the field of lighting lampshades, can solve the problems of difficult discoloration and low abnormal sound, and achieve the effects of good balance performance, reduced abnormal sound and low frictional resistance

Inactive Publication Date: 2007-09-19
MATSUSHITA ELECTRIC WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In short, at present, there is no "impact resistance" that satisfies the "diffusion and transmittance balance of visible light" at the same time, and can prevent cracks due to careless handling when used as a thin lampshade. "Weather-resistant" lighting cover with "low abnormal sound" caused by the influence of temperature changes and "weather resistance" that is difficult to change color even when used close to the lamp

Method used

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  • Resin composition and illuminating lamp shade made of the same
  • Resin composition and illuminating lamp shade made of the same
  • Resin composition and illuminating lamp shade made of the same

Examples

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Embodiment

[0113] The present invention will be described in further detail below based on examples and comparative examples, but the present invention is not limited by these examples. First, the manufacturing methods of the lighting shades in Examples and Comparative Examples will be described.

[0114]A mixture of (a) methacrylic resin, (b) olefin resin, (c) at least one styrene polymer block and at least one conjugated diene compound block is prepared by using a rotary mixer. Hydrogenate, and (d) light diffusing agent, are added to required additives, and mixed. Use a co-rotating twin-screw extruder with a cylinder diameter of Φ47 mm and L / D=31.5 to melt and knead it at a temperature of 240° C. Cut to make pellets. Then, the above-mentioned pellets were melted at a temperature of 240° C. with a single-screw extruder with a cylinder diameter of Φ65 mm, and extruded with a T-die to obtain a sheet with a width of 750 mm and a thickness of 1.8 mm. Cut the sheet into a size of 650mm×65...

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Abstract

The present invention provides a resin composition that has a good balance between diffusibility and transmission of visible rays, and is excellent in impact resistance and weather ability and has low frictional resistance and to provide a lighting cover formed from the resin composition. The resin composition comprises 60-90 wt% of (a) a methacrylic resin, 10-40 wt% of (b) an olefin resin, provided that the total of the components (a) and (b) is 100 wt%, and (c) a hydrogenated product of a copolymer consisting of at least one styrene polymer block and at least one conjugated diene compound block in an amount of 5-15 pts.wt. based on 100 pts.wt of the total of the component (a) and the component (b) wherein the difference in a value of melt flow rate (MFR) under the condition of a temperature of 230 DEG C and a load of 37.3 N between two materials; the component (a) and the component (b) is 10 or less and at least one kind of (d) a light diffusing agent is further blended in an amount of 0.1-15 pts.wt, based on 100 pts.wt. of the total of the components (a)-(c).

Description

technical field [0001] The invention relates to a resin composition with good balance between diffusibility and permeability of visible light, excellent impact resistance and weather resistance, and low frictional resistance, and a lighting lampshade made of the resin composition. Background technique [0002] In recent years, in the field of residential lighting, especially for lighting fixtures such as ceiling lamps that are directly installed on the ceiling, the design trend that is currently being pursued is: to minimize the impression that the entire fixture protrudes from the ceiling when installed on the ceiling, The overall space has a comfortable feeling, and the overall height of the appliance is low (thin thickness). For such lighting fixtures, a thin design in which the height is suppressed (decreased) is gradually adopted, which expands further outside than the peripheral portion of the fixture body. When such a thin-shape lampshade is obtained in the form of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/10F21V3/04
CPCC08L23/00C08L25/10C08L33/10C08L2205/03C08L2666/66F21V3/062
Inventor 田中涉丸谷隆雄
Owner MATSUSHITA ELECTRIC WORKS LTD
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