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Photodiffusion film and preparation method thereof

A technology of light diffusing and light diffusing agent, applied in the field of light diffusing film and its preparation, can solve the problems of light energy loss and low light transmittance of lampshade, and achieve the effect of simple operation and affordable price

Inactive Publication Date: 2013-12-25
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 very high, that is to say, a considerable part of the light energy is lost.

Method used

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  • Photodiffusion film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 4.95g of polycarbonate particles, add to 50ml of tetrachloroethane, and dissolve at 40°C for 24 hours. Weigh 0.05g KMP-590, add it into tetrachloroethane dissolved in polycarbonate, stir at 40°C for 12 hours, pipette 1ml solution on the glass slide with a dropper, first set the speed at 600r / min and pre-rotate for 10s , when the liquid is spread out, rotate at a speed of 2000r / min for 30s, dry at 80°C, then add the dispersion liquid dropwise, spread it flat at the same pre-rotation speed and speed as before, and dry it, and reciprocate 20 times. A light-diffusing polycarbonate film was obtained.

Embodiment 2

[0027] Weigh 4.90 g of polycarbonate particles, add it to 50 ml of tetrachloroethane, and dissolve at a constant temperature of 40° C. for 24 hours. Weigh 0.1g KMP-590, add it into tetrachloroethane dissolved in polycarbonate, stir at 40°C for 12 hours, pipette 1ml onto the glass slide with a dropper, first set the speed at 600r / min for 10s, After the liquid is spread out, rotate at a speed of 2000r / min for 30s, dry at 80°C, then add the dispersion liquid dropwise, spread it flat at the same pre-rotation speed and speed as before, and dry it, and reciprocate 20 times. A light-diffusing polycarbonate film was obtained.

Embodiment 3

[0029] Weigh 4.85g of polycarbonate particles, add to 50ml of tetrachloroethane, and dissolve at 40°C for 24 hours. Weigh 0.15g KMP-590, add it into tetrachloroethane dissolved in polycarbonate, stir at 40°C for 12 hours, pipette 1ml onto the glass slide with a dropper, first set the speed at 600r / min for 10s, After the liquid is spread out, rotate at a speed of 2000r / min for 30s, dry at 80°C, then add the dispersion liquid dropwise, spread it flat at the same pre-rotation speed and speed as before, and dry it, and reciprocate 20 times. A light-diffusing polycarbonate film was obtained.

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Abstract

The invention relates to a photodiffusion film and a preparation method thereof. The photodiffusion film comprises the following components in percentage by weight: 95.0-99.9% of macromolecular base material and 0.1-5.0% of photo scattering agent. The preparation method comprises the steps of: adopting macromolecular base as a main body, adding the photo scattering agent, and evenly diffusing in a solution to prepare the photodiffusion film. The photodiffusion film can be used for preparing various related products in the optical field, is environment-friendly, high in safety property, and suitable for manufacturing lampshade materials for LEDs (Light-Emitting Diode). The problem that the photo scattering agent is unevenly diffused in the macromolecular base can be solved by adopting a solution process, so that the obtained photodiffusion material has high transmittance and haze, and is superior to samples produced under ordinary technological conditions in term of property. In addition, the film with high haze and high transmittance can be prepared by adopting the solution process, and the problems that the base material such as polycarbonate and the like is degraded and yellowed when the melt blending is used can be solved.

Description

technical field [0001] The invention relates to a light diffusion film and a preparation method thereof. Background technique [0002] Lighting is indispensable in human life. For lighting in most situations, it is required that the lighting light has a uniform spatial intensity (or brightness) distribution. The very small size of the LED die and the small light-emitting area make it a true point source of light for lighting purposes. 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 method is to add a light diffusion plate with light scattering or light diffusion in front of the light source to realize the above transformation. [0003] The light-diffusing plate is a light-scattering polymer doped with a light-diffusing agent that has a different refractive index from that of the base material. The light changes the direction of propagation through scattering ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L33/12C08L25/06C08L83/04C08K3/36C08K3/22
Inventor 施利毅丁鹏赵昱巴超群
Owner SHANGHAI UNIV
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