Polycarbonate composite material suitable for LED (light-emitting diode) lamp cover and preparation method thereof

A technology of LED lampshades and polycarbonate, applied in lampshades, lighting and heating equipment, components of lighting devices, etc., can solve the problems of low light transmittance, light energy loss, etc., and achieve uniform dispersion and high transmittance and haze, good compatibility effect

Active Publication Date: 2012-07-04
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The light transmittance of the lampshades used in people's daily life is not high, that is to say, a relatively large part of the light energy is lost

Method used

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  • Polycarbonate composite material suitable for LED (light-emitting diode) lamp cover and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh the following raw materials according to weight ratio (PHR): polycarbonate 100 PHR; light diffusion masterbatch 5 PHR; flame retardant 0.3 PHR; nanometer masterbatch (silicon dioxide) 1 PHR, other additives 0.2 PHR. Put the matrix polycarbonate, nano-masterbatch and other additives and flame retardants into the hopper of the twin-screw extruder, and the light-diffusing masterbatch is fed through the side feeder, melted and extruded, and granulated; the processing technology is as follows : Twin-screw extruder zone 1 temperature 240-250°C, zone 2 temperature 250-260°C, zone 3 temperature 260-270°C, zone 4 temperature 270-275°C, zone 5 temperature 265-270°C, zone 6 temperature 270 -280°C, the die head temperature is 275-280°C, and the pressure is 2-2.5MPa.

Embodiment 2

[0033] Weigh the following raw materials according to the weight ratio (PHR): polycarbonate 100 PHR; light diffusion masterbatch 7 PHR; flame retardant 0.7 PHR; nanometer masterbatch (silicon dioxide) 1 PHR, other additives 0.6 PHR. Put the matrix polycarbonate, nano-masterbatch and other additives and flame retardants into the hopper of the twin-screw extruder, and the light-diffusing masterbatch is fed through the side feeder, melted and extruded, and granulated; the processing technology is as follows : Twin-screw extruder zone 1 temperature 240-250°C, zone 2 temperature 250-260°C, zone 3 temperature 260-270°C, zone 4 temperature 270-275°C, zone 5 temperature 265-270°C, zone 6 temperature 270 -280°C, the die head temperature is 275-280°C, and the pressure is 2-2.5MPa.

Embodiment 3

[0035] Weigh the following raw materials according to weight ratio (PHR): polycarbonate 100 PHR; light diffusion masterbatch 10 PHR; flame retardant 1.0 PHR; nanometer masterbatch (silicon dioxide) 1 PHR, other additives 0.9 PHR. Put the matrix polycarbonate, nano-masterbatch and other additives and flame retardants into the hopper of the twin-screw extruder, and the light-diffusing masterbatch is fed through the side feeder, melted and extruded, and granulated; the processing technology is as follows : Twin-screw extruder zone 1 temperature 240-250°C, zone 2 temperature 250-260°C, zone 3 temperature 260-270°C, zone 4 temperature 270-275°C, zone 5 temperature 265-270°C, zone 6 temperature 270 -280°C, the die head temperature is 275-280°C, and the pressure is 2-2.5MPa.

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Abstract

The invention discloses a polycarbonate composite material suitable for an LED (light-emitting diode) lamp cover and a preparation method thereof. Based on the 100 weight parts PHR (parts per hundreds of rubber or resin) of a substrate polycarbonate material, the composition of the composite comprises the following components in PHR: 100PHR of polycarbonate, 5-15PHR of light scattering master batch, 0.2-1.0PHR of flame retardant, 1-3PHR of nano master batch and 0.2-1.0PHR of other additives. In the method, engineering plastic polycarbonate is used as a main body; and the light scattering master batch and the nano additive master batch are firstly prepared through an internal mixer and then smashed at high speed, and finally, the light scattering master batch and other raw materials are subjected to blending, extruding and granulating by adopting a side feeding method. By using the method, the problem that the dispersion of a light dispersing agent and other additives is not uniform issolved, and the obtained light dispersing material has high transmissivity and haze. The polycarbonate composite material disclosed by the invention can be used for preparation of related products inthe optical field, is environment-friendly, high in safety and excellent in various physical and mechanical properties, and is suitable for preparing the LED lamp covers and other light guiding materials.

Description

technical field [0001] The invention relates to the technical field of polymer materials and lighting, and relates to a light diffusion material and its production method and application, in particular to a light diffusion material with less absorption of incident light and high diffusion efficiency, that is, polycarbonate suitable for LED lampshades. Ester composite material and its preparation method. Background technique [0002] Lighting technology is indispensable in human life. For lighting in most situations, it is required that the lighting light has a uniform spatial light intensity (or luminance) distribution. The size of the LED die is very small, and the light-emitting area is also small. It is a real point source of light for lighting, but it is accompanied by the problem of unidirectional glare. In order to achieve uniform illumination, it is necessary to convert the light emitted by point light source or line light source into surface emission. A common met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L83/04C08K13/02C08K3/22C08K3/36C08K3/34C08J3/22B29B7/28B29B9/06B29C47/92F21V3/04F21Y101/02B29C48/92F21Y115/10
CPCB29C48/04B29C48/40
Inventor 丁鹏施利毅徐晓磊汪庆李宗周宋娜唐圣福
Owner SHANGHAI UNIV
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