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High-transmittance glass fiber reinforced PC composite material and preparation method thereof

A technology of glass fiber and composite materials, which is applied in the field of high-transparency glass fiber-reinforced PC composite materials and its preparation. It can solve the problems of PC product light transmittance reduction and limited application range, and achieve the improvement of tensile strength, transparency, and The effect of improving light transmission

Pending Publication Date: 2020-09-25
CHONGQING POLYCOMP INT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the refractive index (1.540-1.550) of ordinary glass fiber is quite different from that of polycarbonate (1.570-1.590), the use of ordinary glass fiber to reinforce PC will significantly reduce the light transmittance of PC products, thereby limiting range of applications

Method used

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  • High-transmittance glass fiber reinforced PC composite material and preparation method thereof
  • High-transmittance glass fiber reinforced PC composite material and preparation method thereof
  • High-transmittance glass fiber reinforced PC composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In terms of mass percentage, after mixing the PC resin of 89.4wt% and the antioxidant of 0.6wt% in a high-speed mixer; Out of the machine; at the same time, through the side feeding of the twin-screw extruder, 10wt% high-transparency and high-refractive index glass fiber chopped strands are added to the twin-screw extruder in a certain proportion, and the material temperature is controlled at 260-290°C. Extrusion processing: cooling, cutting, and drying the compound extruded by a twin-screw extruder to obtain glass fiber-reinforced PC composite pellets 1 with high light transmittance.

[0042] Add the high light transmittance glass fiber reinforced PC composite material pellet 1 into an injection molding machine, and inject it into a test sample. The test sample has a light transmittance of 51%, a tensile strength of 91MPa, and an unnotched impact strength of 38KJ / m 2 .

Embodiment 2

[0044] In terms of mass percentage, after mixing the PC resin of 79.6wt% and the antioxidant of 0.4wt% in a high-speed mixer; Out of the machine; at the same time, through the side feeding of the twin-screw extruder, 20wt% high-transparency and high-refractive index glass fiber chopped strands are added to the twin-screw extruder according to a certain proportion, and the temperature of the material is controlled at 260-290°C. Extrusion processing: cooling, cutting, and drying the compound extruded by the twin-screw extruder to obtain high light transmittance glass fiber reinforced PC composite pellets 2 .

[0045] The high light transmittance glass fiber reinforced PC composite pellets 2 were added to the injection molding machine, and injected into a test sample. The light transmittance was tested to be 29%, the tensile strength was 136MPa, and the unnotched impact strength was 53KJ / m 2 .

Embodiment 3

[0047] In terms of mass percentage, after mixing the PC resin of 69.8wt% and the antioxidant of 0.2wt% in a high-speed mixer; Out of the machine; at the same time, through the side feeding of the twin-screw extruder, 30wt% high-transparency and high-refractive index glass fiber chopped strands are added to the twin-screw extruder according to a certain proportion, and the temperature of the material is controlled at 260-290°C. Extrusion processing: cooling, cutting, and drying the compound extruded by the twin-screw extruder to obtain high light transmittance glass fiber reinforced PC composite pellets 3 .

[0048] Add the high-transmittance glass fiber reinforced PC composite pellets 3 into an injection molding machine, and inject them into a test sample. The test sample has a light transmittance of 18%, a tensile strength of 143MPa, and an unnotched impact strength of 61KJ / m 2 .

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Abstract

The high-transmittance glass fiber reinforced PC composite material, which is prepared from the following raw materials in percentage by mass: 5-40 wt% of high-transparency high-refractive-index glassfiber, 60-95 wt% of polycarbonate and 0-1 wt% of an antioxidant; wherein the refractive index of the high-transparency and high-refractive-index glass fiber is 1.570-1.590, and the high-transparencyand high-refractive-index glass fiber does not contain TiO2 or only serves as an impurity to introduce a very small amount of TiO2. High-transparency and high-refractive-index glass fibers are used for preparing the high-refractive-index glass fiber reinforced PC composite material. According to the glass fiber reinforced PC composite material, the transparency and the light transmittance of the glass fiber reinforced PC composite material are improved, the light transmittance of the composite material product is improved by 20% or above and even can reach 50%, the mechanical property of the composite material product is more excellent than that of a conventional glass fiber reinforced PC composite material, and particularly the tensile strength is improved by 10% or above.

Description

technical field [0001] The invention belongs to the technical field of polymer material modification, in particular to a high-transparency glass fiber reinforced PC composite material and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a kind of thermoplastic engineering resin with excellent light transmission and excellent comprehensive performance. Because its molecular chain contains benzene ring and carbonate structure, it is very rigid and has excellent impact resistance and heat resistance. It is widely used in aviation, rail transit, automobile, construction and other technical fields. Glass fiber reinforced PC composites can not only improve the mechanical properties and dimensional stability of PC resins, but also reduce the linear expansion coefficient and molding shrinkage of PC resins, and overcome the technical defects of PC resins such as stress cracking resistance and fatigue strength. , greatly expanding the scope of applica...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08K7/14C08K5/134C08J5/04C03C13/02
CPCC08J5/043C03C13/00C08J2369/00C08K7/14C08K5/1345
Inventor 韩利雄姚远曾庆文谭家顶彭珂苟习颖宋凡徐强王艺高冰心许诗勇黄浪
Owner CHONGQING POLYCOMP INT
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