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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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 overcom...

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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.

Technology Topic

ThermoplasticEngineering +2

Examples

Experimental program(7)
Comparison scheme(1)

Example Embodiment

[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 short glass fibers are mixed with raw materials and extruded together in the lower hopper of a single-screw extruder, and the others are the same as in embodiment 1.

Example Embodiment

[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 materials and extruded together from the lower hopper of a single-screw extruder, and the others are the same as in embodiment 2.

[0042] In comparative example 2B, the mixture in Example 2 was poured into the lower hopper of the twin-screw extruder, and after controlling the screw speed and feeding speed, 10 kg of long glass fibers were introduced from the fiber inlet, and tested after extrusion.

[0043] Physical property comparison table of embodiment 2

Example Embodiment

[0044] Test standard embodiment 2 embodiment 2A 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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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Reduce manufacturing cost
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Fiber reinforced thermolplastic plastic preparation method

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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