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LED lampshade injection blow grade light scattering PC and preparation method

A technology of LED lampshade and light diffusing agent, which is applied in the field of chemical materials, can solve the problems of difficult control of lampshade thickness uniformity, unstable flame retardancy, and difficulty in molding, etc., and achieve the effect of uniform thickness of lampshade, convenient operation and simple process

Inactive Publication Date: 2014-04-16
厦门市宏盛坤工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing LED lampshade light diffusion PC, due to the high viscosity of PC itself, a large injection pressure is required, and there is a large internal stress, which makes it difficult to form, and it is difficult to fill the mold for blown injection products. The surface is difficult to be smooth, and there are depressions. The uniformity of thickness is not easy to control, the flame retardancy is unstable, and it is easy to produce light and shadow, phantom light, and seeing lamp beads, etc.

Method used

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  • LED lampshade injection blow grade light scattering PC and preparation method
  • LED lampshade injection blow grade light scattering PC and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) engineering plastics with a weight ratio of 98.889%;

[0029] (2) Take by weight 0.5% light diffusing agent and 0.3% processing protection agent, and mix evenly;

[0030] (3) Weigh the weight ratio and weigh 0.01% fluorescent whitening agent and 0.001% ultramarine blue, and put them into the mixer together with the engineering plastics in (1) and the mixed light diffusing agent and processing protection agent in (2) Continue mixing until homogeneous;

[0031] (4) Put the mixed raw materials in (3) into the feeding hopper of the twin-screw extruder, wait for melt extrusion, and granulate. The processing technology is as follows: the temperature of the first zone of the twin-screw extruder is 170-190°C, the temperature of the second zone is 240-255°C, the temperature of the third zone is 245-260°C, the temperature of the fourth zone is 250-260°C, the temperature of the fifth zone is 250-260°C, The temperature of the sixth zone is 260-270°C, the temperature of the se...

Embodiment 2

[0033] (1) Take by weight 98.639% engineering plastics and 0.2% mold filling agent, mix evenly;

[0034] (2) Weigh 0.5% light diffusing agent, 0.3% processing protection agent and 0.05% stress reliever in weight ratio, and mix evenly;

[0035] (3) Weigh the weight ratio and take 0.01% fluorescent whitening agent and 0.001% ultramarine blue, mix with the engineering plastics in (1), mold filling agent and (2) in the light diffusing agent, processing protection agent and stress Put the powder such as eliminating agent into the mixer together and continue mixing until uniform;

[0036] (4) Put the mixed raw materials in (3) into the feeding hopper of the twin-screw extruder, wait for melt extrusion, and granulate. The processing technology is as follows: the temperature of the first zone of the twin-screw extruder is 170-190°C, the temperature of the second zone is 240-255°C, the temperature of the third zone is 245-260°C, the temperature of the fourth zone is 250-260°C, the tem...

Embodiment 3

[0038] (1) Take by weight 98.6% engineering plastics and 0.2% mold filling agent, mix evenly;

[0039] (2) Weigh 0.5% light diffusing agent, 0.3% processing protection agent and 0.1% stress reliever in weight ratio, and mix evenly;

[0040] (3) Weigh the weight ratio and take 0.01% fluorescent whitening agent and 0.001% ultramarine blue, mix with the engineering plastics in (1), mold filling agent and (2) in the light diffusing agent, processing protection agent and stress Put the powder such as eliminating agent into the mixer and continue mixing until uniform;

[0041] (4) Put the mixed raw materials in (3) into the feeding hopper of the twin-screw extruder, wait for melt extrusion, and granulate. The processing technology is as follows: the temperature of the first zone of the twin-screw extruder is 170-190°C, the temperature of the second zone is 240-255°C, the temperature of the third zone is 245-260°C, the temperature of the fourth zone is 250-260°C, the temperature of ...

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Abstract

The invention discloses a LED lampshade injection blow grade light scattering PC and a preparation method. The LED lampshade injection blow grade light scattering PC comprises the following components by weight: 97-99% of engineering plastics, 0-1 parts of light scattering agent, 0.3-0.7% of dispersant, 0.2-0.6% of processing protective agent, 0.01-0.1% of stress remover, 0-0.2% of mold filling agent and 0.1-0.2% of other auxiliary agents. The preparation method comprises the following steps: weighting the engineering plastic, the mold filling agent, the light scattering agent, the processing protective agent, the stress remover, a fluorescent brightening agent and ultramarine by weight, uniformly mixing, then putting into a loading hopper of a double screw extruder, extruding after melting, and granulating. The yield of the LED lampshade injection blow grade light scattering PC injection molding can be increased, the internal stress generation of the injection molding can be reduced at maximum degree, the lampshade thickness is uniform, the luminous flux transmittance is high, the flame retardation grade is increased from UL94V2 to V0, and the preparation method has the advantages of simple technology, convenient operation and low cost.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and in particular relates to LED lampshade injection-blowing grade light-diffusing polycarbonate composite (PC) and a preparation method thereof. Background technique [0002] The production of LED lampshades generally has three processes: injection molding, extrusion and injection blowing. The corresponding light diffusion PC used should be injection molding grade, extrusion grade and injection blowing grade. At present, there is no LED lampshade light diffusion PC specially used for injection blowing on the market. Common light diffusion PCs for LED lampshades are injection molding and extrusion grades, and are generally imported materials, which are expensive. Due to the lack of injection-blow-grade light-diffusing PC, many injection-blow process LED lampshade production raw materials are replaced by injection molding grade and extrusion grade. In the existing LED lampshade light d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L83/00C08K5/526C08K5/103B29B9/06B29C47/92F21V3/04F21Y101/02B29C48/92F21Y115/10
CPCB29C48/40B29C48/875B29C48/92B29C2948/92514B29C2948/92561B29C2948/92704B29C2948/92895
Inventor 于文华
Owner 厦门市宏盛坤工贸有限公司
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