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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, reduce equipment investment and fiber raw material cost, etc., achieve good physical properties, reduce production cost, and improve product appearance.

Inactive Publication Date: 2006-06-21
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

[0025] Embodiment 1A is that after 38 kilograms of short glass fibers are mixed with raw materials, they are extruded together in the lower hopper of a single-screw extruder, and the others are the same as in Embodiment 1.

[0026] Example 1B is to pour the mixture in Example 1 into the lower hopper of the twin-screw extruder, and after controlling the screw speed and feeding speed, 38 kg of long glass fibers are introduced from the fiber inlet, and tested after extrusion.

[0027] standard test

[0028] PBT: polybutylene terephthalate

[0029] the rear

[0030] 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...

Embodiment 2

[0031] Embodiment 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.

[0032] Example 2B is to pour the compound in Example 2 into the lower hopper of the twin-screw extruder, control the screw speed and feeding speed, and introduce 10 kg of long glass fibers through the fiber inlet, and test after extrusion.

[0033] standard test

[0034] PBT: Polybutylene terephthalate PC: Polycarbonate

[0035] the rear

[0036] After the extruder is started, 25 kg of chopped carbon fibers are evenly added through the exhaust port of the vented extruder. After blending and extruding, they are 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 controlle...

Embodiment 3

[0037] Embodiment 3A is that 25 kilograms of chopped carbon 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 3.

[0038] Example 3B is to pour the compound in Example 3 into the lower hopper of the twin-screw extruder, control the screw speed and feeding speed, and introduce 25 kg of long bundles of carbon fibers through the fiber inlet, and test after extrusion.

[0039] standard test

[0040] PA6: Nylon 6 (polycaprolactam)

[0041] the rear

[0042] After starting the extruder, add 25 kg of chopped aramid fiber evenly through the exhaust port of the vented extruder, after blending and extruding, pass through the water tank to cool and then cut into pellets. 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 a...

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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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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/04C08L23/00C08L67/00C08L77/00C08L69/00B29C47/38B29C48/395
CPCB29C2948/9259B29C2948/92704
Inventor 林军孙枫张永王德平张文周晓艺
Owner 安善兴
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