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Thermoplastic composite material, preparation method thereof and high-precision plastic part

A composite material and thermoplastic technology, applied in the field of resin composite materials, can solve the problems of long-term operation accuracy reduction, weak intermolecular force, low dimensional stability, etc. high impact effect

Active Publication Date: 2020-10-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with metals, the intermolecular force of thermoplastic engineering plastics is weaker, and the coefficient of thermal expansion is relatively large, so the dimensional stability is low. Thermal deformation will occur, which will reduce the long-term running accuracy of components, thus limiting the application of thermoplastic engineering plastics in precision equipment and instruments

Method used

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  • Thermoplastic composite material, preparation method thereof and high-precision plastic part
  • Thermoplastic composite material, preparation method thereof and high-precision plastic part
  • Thermoplastic composite material, preparation method thereof and high-precision plastic part

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preparation example Construction

[0047] Correspondingly, an embodiment of the present invention also provides a method for preparing a thermoplastic composite material, comprising the following steps:

[0048]S10. In parts by weight, take 20-80 parts of functional fillers and 1-10 parts of coupling agents and add them into a high-speed mixer to mix evenly, and obtain a mixture after drying; the functional fillers include 0-80 parts of negative thermal expansion Materials and 0-80 parts silica microbeads;

[0049] S20. Add the mixture together with 20-80 parts of thermoplastic engineering plastics, 0.5-1 part of antioxidant, and 0.5-2 parts of other additives into a twin-screw extruder for mixing, extrude and granulate to obtain thermoplastic Composite material, wherein the total parts by weight of the thermoplastic engineering plastic and the functional filler is 100 parts.

[0050] In the embodiment of the present invention, in step S10, the time for raw materials to be mixed in the high-speed mixer is 1min...

Embodiment 1

[0067] A kind of thermoplastic composite material, described composite material comprises each component of following parts by weight: linear polyphenylene sulfide 30 parts, pyrotungstate (ZrW 2 o 8 )60 parts, SiO 2 10 parts of microbeads, 1.5 parts of silane coupling agent, 0.5 parts of antioxidant, 1 part of other additives.

[0068] The preparation method of the thermoplastic composite material of this embodiment comprises the following steps:

[0069] S10, pyrotungstate (ZrW 2 o 8 ), SiO 2 Add the microbeads and silane coupling agent into a high-speed mixer, mix at a stirring speed of 800 rpm for 20 minutes, and then dry at 120°C for 2 hours to obtain a mixture;

[0070] S20. Add polyphenylene sulfide to the twin-screw extruder after pre-drying, together with the above-mentioned mixture, antioxidant, and processing aid, and mix and disperse it. The screw speed of the twin-screw extruder is 200 rpm. Processing The temperature is 320° C. After extrusion and cooling, pl...

Embodiment 2

[0073] A kind of thermoplastic composite material, described composite material comprises each component of following parts by weight: linear polyphenylene sulfide 30 parts, pyrophosphate (ZrP 2 o 7 )60 parts, SiO 2 10 parts of microbeads, 1.5 parts of silane coupling agent, 0.5 parts of antioxidant, 1 part of other additives.

[0074] The preparation method of the thermoplastic composite material of this embodiment comprises the following steps:

[0075] S10, pyrophosphate (ZrP 2 o 7 ), SiO 2 Add the microbeads and silane coupling agent into a high-speed mixer, mix at a stirring speed of 600 rpm for 30 minutes, and then dry at 120°C for 3 hours to obtain a mixture;

[0076] S20. Add the polyphenylene sulfide to the twin-screw extruder after pre-drying, together with the above-mentioned compound, antioxidant, and processing aid, and mix and disperse it. The screw speed of the twin-screw extruder is 300 rpm. Processing The temperature is 320° C. After extrusion and cooling,...

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Abstract

The embodiment of the invention provides a thermoplastic composite material taking engineering plastic as a matrix. The composite material is prepared from the following components in parts by weight:20-80 parts of thermoplastic engineering plastic, 20-80 parts of functional filler, 1-10 parts of coupling agent, 0.5-1 part of antioxidant and 0.5-2 parts of other auxiliaries, the functional filleris prepared from 0-80 parts of negative thermal expansion material and 0-80 parts of silicon dioxide microbeads, and the total weight part of the thermoplastic engineering plastic and the functionalfiller is 100 parts. The thermoplastic composite material has an extremely low linear thermal expansion coefficient, good heat resistance and high stability, can be used for preparing high-precision structural parts such as optical communication and 5G equipment, and improves the long-term operation precision of precision equipment products. The embodiment of the invention also provides a preparation method of the composite material and a high-precision plastic part.

Description

technical field [0001] The invention relates to the technical field of resin composite materials, in particular to a thermoplastic composite material with an ultra-low thermal expansion coefficient, a preparation method thereof and high-precision plastic parts. Background technique [0002] Thermoplastic engineering plastics have the characteristics of high rigidity, low creep, high comprehensive strength and good formability, and can replace metals as engineering structural materials. However, compared with metals, the intermolecular force of thermoplastic engineering plastics is weaker, and the coefficient of thermal expansion is relatively large, so the dimensional stability is low. Thermal deformation will occur, which will reduce the long-term running accuracy of components, thus limiting the application of thermoplastic engineering plastics in precision equipment and instruments. [0003] Therefore, in order to meet the demand for high dimensional stability of precisi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/02C08L79/08C08L101/12C08K9/06C08K7/18C08K3/24C08K3/32C08K3/28C08K9/04C08K3/34
CPCC08K9/06C08K7/18C08K3/24C08K3/28C08K9/04C08K3/34C08K3/32C08L81/02C08L79/08C08L101/12
Inventor 彭雪松胡邦红曹娟娟史华良章园红
Owner HUAWEI TECH CO LTD
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