Light scattering polycarbonate composite and light scattering materials (such as films, sheets, plates) prepared from light scattering polycarbonate composite

A technology of polycarbonate and polycarbonate resin, applied in the field of light-scattering polycarbonate composites and light-scattering materials (films, sheets, plates, etc.) prepared therefrom, can solve energy waste, limited application, material mechanics performance deterioration and other problems, to achieve the effect of excellent light scattering performance, simple and easy operation, and good light stability

Inactive Publication Date: 2012-10-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, when inorganic particles are used as light-scattering particles, they have the following weaknesses: ① While increasing the haze of the material, the light transmittance will be greatly reduced
②Poor compatibility with matrix material, difficult to evenly disperse in matrix material
③ A large amount of inorganic particles added will lead to deterioration of the mechanical properties of the material
④Inorganic particles have high hardness, which will cause certain wear and tear on the equipment
⑤ Some inorganic particles have a strong absorption of light in a certain band, which is not conducive to scattering, and some particles are sensitive to heat, oxygen and ultraviolet light, which is not conducive to the stability of light scattering performance
However, the preparation cost of conventional organic scatterer particles is relatively high, and like inorganic particles, it increases the haze of the material while reducing the light transmittance. At the same time, it cannot be deformed during the molding process, and the obtained isotropic light scattering material, which wastes energy to a certain extent and limits its application

Method used

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  • Light scattering polycarbonate composite and light scattering materials (such as films, sheets, plates) prepared from light scattering polycarbonate composite
  • Light scattering polycarbonate composite and light scattering materials (such as films, sheets, plates) prepared from light scattering polycarbonate composite
  • Light scattering polycarbonate composite and light scattering materials (such as films, sheets, plates) prepared from light scattering polycarbonate composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 100 parts by mass of polycarbonate resin, 11 parts by mass of acrylonitrile copolymer and conventional additives were melt blended and granulated by a twin-screw extruder to obtain a light-scattering polycarbonate compound. The composite was press-molded at 240°C to prepare a 0.60 mm thick light-scattering sheet. The measured light transmittance is 85.9%, and the haze is 64.45%. The tensile strength is 62.28MPa, and the heat distortion temperature is 114.8°C. After the point light source passes through the light scattering sheet, the scattering effect is as follows: figure 2 shown.

Embodiment 2

[0052] 100 parts by mass of polycarbonate resin, 25 parts by mass of acrylonitrile copolymer and conventional additives were melt blended and granulated by a twin-screw extruder to obtain a light-scattering polycarbonate compound. The composite was press-molded at 240°C to prepare a 0.60 mm thick light-scattering sheet. The measured light transmittance is 87.5%, and the haze is 90.28%. The tensile strength is 65.38MPa, and the heat distortion temperature is 103.7°C. After the point light source passes through the light scattering sheet, the scattering effect is as follows: image 3 shown.

Embodiment 3

[0054] 100 parts by mass of polycarbonate resin, 43 parts by mass of acrylonitrile copolymer, conventional additives and 5 parts of haze regulator were melt-blended and granulated by a twin-screw extruder to obtain a light-scattering polycarbonate compound. The composite was press-molded at 240°C to prepare a 0.60 mm thick light-scattering sheet. The measured light transmittance is 89.3%, and the haze is 91.62%. The tensile strength is 67.90MPa, and the heat distortion temperature is 100.9°C. After the point light source passes through the light scattering sheet, the scattering effect is as follows: Figure 4 shown.

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Abstract

The invention provides a light scattering polycarbonate composite and light scattering materials (such as films, sheets, plates) prepared from the composite. The composite comprises (A) a base material, namely a polycarbonate resin and (B) a scatterer material which can be molten and deformed into polymer in the forming process of polycarbonate, such as acrylonitrile copolymer. The light scattering materials (such as films, sheets, plates) with isotropic scatterning performance or anisotropic (such as linear )scattering performance can be prepared from the composite material, and the requirements of high light transmittance and high haze can be met; and the light scattering materials are suitable for light scattering films, sheets, plates and the like in the field of liquid crystal displays, and the illumination materials of light guide plates, lampshades or advertising light boxes, show windows and the like.

Description

technical field [0001] The present invention relates to a light-scattering polycarbonate compound and the light-scattering material (film, sheet, plate, etc.) prepared therefrom. If necessary, the polycarbonate light-scattering material (film, sheet, plate, etc.) can meet high According to the requirements of light transmittance and high haze, and according to different molding methods, the polycarbonate composite material can be used to prepare light scattering materials with isotropic scattering or anisotropic (such as linear) scattering (film, sheet, plate, etc.). It is suitable for light diffusion films, sheets, plates, etc. in the field of liquid crystal displays, as well as lighting fields such as light guide plates, lampshades, advertising light boxes, and display windows. [0002] Background technique [0003] Polymer light-scattering material refers to a type of polymer-based composite material that can not only allow light to pass through but also effectively sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L33/20B29B7/00G02B5/02
Inventor 郭少云熊英董现明
Owner SICHUAN UNIV
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