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Fiber reinforced thermolplastic plastic preparation method

A thermoplastic and fiber-reinforced technology, applied in the field of plastic production, can solve the problems of poor strength, high production cost, lower equipment investment and fiber raw material cost, etc., and achieve the effects of good physical properties, lower production costs, and improved product appearance.

Inactive Publication Date: 2005-01-26
安善兴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing fiber-reinforced thermoplastics in view of the defects in the prior art, which can overcome the disadvantages of poor product strength and high production cost in the prior art, and achieve the effect of reducing equipment investment and fiber raw material costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: 70 kilograms of PBT resins are dried 4 hours at 120 ℃ in drying oven, and it is mixed with 9 kilograms of decabromodiphenyl ethers, 4 kilograms of antimony trioxide, 5 kilograms of toughening agents (grafted tertiary ethyl ether) Propylene rubber) mixed and placed in the lower hopper of the vented single-screw extruder, the temperature of each part of the extruder is as follows.

[0024] Rear Middle Front

[0025] Temperature (℃) 190~220 220~250 220~250

[0026] After starting the extruder, add 38 kg of short glass fibers evenly through the exhaust port of the exhaust extruder. After blending and extruding, it is cooled by a water tank and then pelletized. The pellets were dried in a drying oven at 120°C for 4 hours, and then the samples were injected from the injection machine and tested according to the standard. The screw speed is controlled at 20-30 rpm.

[0027] Comparative example 1A is that 38 kilograms of s...

Embodiment 2

[0037] Example 2: 15 kg of PBT resin, 35 kg of PC were dried in a drying oven at 120°C for 4 hours, and mixed with 3 kg of decabromodiphenyl ether, 3 kg of brominated PC, 3 kg of antimony trioxide, 0.05 1 kg of antioxidant is mixed and placed in the lower hopper of the vented single-screw extruder. The temperature of each part of the extruder is as follows.

[0038] Rear Middle Front

[0039] Temperature (℃) 200~220 220~250 220~350

[0040] After starting the extruder, add 10 kg of short glass fibers evenly through the exhaust port of the exhaust extruder, after blending and extruding, it is cooled by a water tank and then pelletized. The pellets were dried in a drying oven at 120°C for 4 hours, and then the samples were injected from the injection machine and tested according to the standard. The screw speed is controlled at 100-120 rpm

[0041] Comparative example 2A is that 10 kilograms of short glass fibers are mixed with raw mate...

Embodiment 2B

[0045] Tensile strength (MPa) ISO-527 130 120 125

[0046] Bending strength (MPa) ISO-179 180 170 180

[0047] Impact Strength (23℃) ISO-178 25 22 24

[0048] (KJ / m 2 )

[0049] Sample Appearance Visually good good bad

[0050] PBT: Polybutylene terephthalate PC: Polycarbonate

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PUM

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Abstract

The invention provides a fiber reinforced thermolplastic plastic preparation method, which is obtained by mixing thermoplastic resin, fortifying fiber and auxiliary substance with exhaust type single screw-spindle extrusion machine, and extruding them, the extrusion temperature being 190-350 deg. C, the screw-spindle rotate speed being 20-120 r / min.

Description

technical field [0001] The invention relates to plastic production technology, in particular to a preparation method of a novel fiber-reinforced thermoplastic. Background technique [0002] An important development direction of plastic processing is to modify existing plastics to improve performance. For example, reinforced modified plastics are prepared by using reinforced fibers, which can effectively improve the mechanical properties and heat resistance of plastics, and in some respects meet or exceed the properties of metal materials. Such materials are called fiber reinforced thermoplastics FRTP (fiber reinforcedthermoplastics). [0003] There are two traditional methods for producing FRTP. One is to add bundled long fibers from the fiber inlet in the middle of the twin-screw extruder. The other is to add chopped fibers and raw materials together at the discharge port of a single-screw extruder. [0004] The advantage of the former pro...

Claims

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Application Information

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IPC IPC(8): B29C48/395C08J5/04C08L23/00C08L67/00C08L69/00C08L77/00
CPCB29C2947/92704B29C2947/9259B29C2948/9259B29C2948/92704
Inventor 林军孙枫张永王德平张文周晓艺
Owner 安善兴
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