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A kind of glass fiber reinforced halogen-free flame-retardant polycarbonate composite material and preparation method thereof

A technology of flame-retardant polycarbonate and composite materials, applied in the field of composite materials, can solve the problems of increasing the weight and unit cost of plastic products, making plastic products brittle and easy to break, and reducing the toughness index of materials, so as to enhance product competitiveness, Prevent melting and dripping, and the effect of easy control of the process

Inactive Publication Date: 2016-05-11
SHANGHAI JUNQI NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 2), the color is porcelain white, difficult to dye
[0006] 3) In the existing formulations of similar products, the addition of flame retardants at 20%-25% increases the proportion of materials, thus increasing the weight and unit cost of plastic products
And it reduces the toughness index of the material, causing the plastic products using this material to become brittle and easy to break

Method used

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  • A kind of glass fiber reinforced halogen-free flame-retardant polycarbonate composite material and preparation method thereof
  • A kind of glass fiber reinforced halogen-free flame-retardant polycarbonate composite material and preparation method thereof
  • A kind of glass fiber reinforced halogen-free flame-retardant polycarbonate composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1) Take 68.7kg of polycarbonate, 29kg of glass fiber, 0.1kg of flame retardant, 0.3kg of anti-dripping agent, 0.3kg of antioxidant, 0.3kg of toughening agent, 0.3kg of lubricant and 1kg of color masterbatch in a plastic cylinder Mix for 3 minutes, stir to mix well;

[0055] Among them, the diameter of glass fiber is 3mm, the refractive index of polycarbonate is 1.60, and the transmittance is 90%. The pigment in the masterbatch is carbon black.

[0056] 2) Take out the mixed raw materials in the above step 1), pour them into the feed port of the twin-screw extruder, extrude them at a temperature of 180°C and a speed of 300 rpm, and extrude them into strip-shaped raw materials ;

[0057] 3) Cool the primary material obtained in step 2) in a water tank and in the air, and then cut it into plastic particles by a pelletizer to obtain a glass fiber-reinforced halogen-free flame-retardant polycarbonate composite material, and the color is black .

Embodiment 2

[0059] 1) Take 87kg of polycarbonate, 10kg of glass fiber, 0.3kg of flame retardant, 0.3kg of anti-dripping agent, 0.3kg of antioxidant, 0.3kg of toughening agent, 0.3kg of lubricant and 1.5kg of color masterbatch in a plastic cylinder Mix for 10 minutes, stir to mix well;

[0060] Among them, the diameter of glass fiber is 4mm, the refractive index of polycarbonate is 1.68, and the transmittance is 94%. The pigment in the masterbatch is cadmium red.

[0061] 2) Take out the raw material mixed in the above step 1), pour it into the feed port of the twin-screw extruder, extrude it at a temperature of 190°C and a speed of 320 rpm, and extrude it into a strip-shaped raw material ;

[0062] 3) Cool the primary material obtained in step 2) in a water tank and in the air, and then cut it into plastic particles by a pelletizer to obtain a glass fiber-reinforced halogen-free flame-retardant polycarbonate composite material, and the color is red .

Embodiment 3

[0064] 1) Take 80.7kg of polycarbonate, 15kg of glass fiber, 0.3kg of flame retardant, 0.5kg of anti-dripping agent, 0.5kg of antioxidant, 0.5kg of toughening agent, 0.5kg of lubricant and 2kg of color masterbatch in a plastic cylinder Mix for 7 minutes, stir to mix well;

[0065] Among them, the diameter of glass fiber is 5mm, the refractive index of polycarbonate is 1.62, and the transmittance is 91%. The pigment in the color masterbatch is permanent yellow.

[0066]2) Take out the raw materials mixed in the above step 1), pour them into the feed port of the twin-screw extruder, extrude them at a temperature of 200°C and a speed of 340 rpm, and extrude them into strip-shaped raw materials ;

[0067] 3) Cool the primary material obtained in step 2) in a water tank and in the air, and then cut it into plastic particles by a pelletizer to obtain a glass fiber-reinforced halogen-free flame-retardant polycarbonate composite material, and the color is yellow .

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Abstract

The invention discloses a glass fiber reinforced halogen-free flame retardant polycarbonate composite material and a preparation method thereof. The composite material comprises the following components in percentage by weight: 68-87% of polycarbonate, 10-29% of glass fiber, 0.1-0.3% of a flame retardant and 2.2-4% of an additive. When the composite material is prepared, polycarbonate, glass fiber, a flame retardant and an additive are mixed and stirred for 3-10 minutes, and then the obtained mixture is poured into a twin-screw extruder, and extruded into a strip initial material at a temperature of 180-220 DEG C and a rotating speed of 300-220 RPM; and the strip initial material is cooled by a water tank and air, and then is cut into plastic particles. The composite material disclosed by the invention has the beneficial effects that the composite material has a good flame retardant function, and achieves a UL94-V0 level and internationally certificated level flame retardant effect, the specific gravity of the material is not increased, and the other physical performance indexes of the material are reduced. The composite material also can be dyed into a black or colored material, and the composite material is environment-friendly and non-toxic. In addition, the preparation method is simple, easily controlled in process, and high in productivity.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a glass fiber-reinforced halogen-free flame-retardant polycarbonate composite material and a preparation method thereof. Background technique [0002] With the development of science and technology, the replacement of electronic and electrical products is very rapid. The display has undergone three generations of technology updates from CRT, plasma to liquid crystal. LCD TV display module materials are very important for the proper assembly of LCD TVs, and are generally made of glass fiber reinforced polycarbonate. [0003] In the existing formula of similar products, there are generally the following disadvantages: [0004] 1) It uses brominated flame retardants, which have been banned by the European Union and North America and other countries, and are non-environmentally friendly materials. [0005] 2), the color is porcelain white, difficult to dye....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08K13/04C08K7/14B29B9/06B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B7/7461B29B7/90B29B9/06B29B9/12B29B9/14B29C48/40C09K21/14
Inventor 马延霏
Owner SHANGHAI JUNQI NEW MATERIALS
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