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Polyformaldehyde polymer composite material and preparation method thereof and preparation method of molding material

A composite material and molding material technology, which is applied in the field of polyoxymethylene polymer composite material and its preparation, and the field of molding material preparation, can solve the problems affecting the application effect and application range, high friction coefficient of pure polyoxymethylene, and achieve good self-lubricating performance. , Excellent friction and wear resistance, suitable for industrial production

Active Publication Date: 2019-04-16
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure polyoxymethylene has a high friction coefficient and is only suitable for low-temperature and low-load environments, which affects its application effect and application range. At present, it is usually used to add fillers to make polyoxymethylene into a composite material to improve its performance.

Method used

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  • Polyformaldehyde polymer composite material and preparation method thereof and preparation method of molding material
  • Polyformaldehyde polymer composite material and preparation method thereof and preparation method of molding material
  • Polyformaldehyde polymer composite material and preparation method thereof and preparation method of molding material

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[0019] The embodiment of the present invention provides a kind of preparation method of polyoxymethylene polymer composite material, it comprises the following steps:

[0020] Step S1, mixing polytetrafluoroethylene micropowder and polyoxymethylene micropowder at high speed to form polytetrafluoroethylene-polyoxymethylene composite particles.

[0021] Wherein, the average particle diameter of the polytetrafluoroethylene-polyoxymethylene composite particles is 40 microns to 160 microns.

[0022] In this embodiment, the polytetrafluoroethylene micropowder has an average particle diameter of 2 microns to 5 microns, and the polyoxymethylene micropowder has an average particle diameter of 30 microns to 150 microns. The molecular weight of the polytetrafluoroethylene is 10,000-30,000. The molecular weight of the polyoxymethylene is 50,000-70,000.

[0023] In this embodiment, the high-speed mixing time of the polytetrafluoroethylene micropowder and polyoxymethylene micropowder to f...

Embodiment 1

[0040] Weigh 200g of polytetrafluoroethylene micropowder and 796g of polyoxymethylene micropowder into a high-speed mixer device, and carry out compound treatment at a speed of 3000r / min for 10min to obtain polytetrafluoroethylene-polyoxymethylene composite particles. Spray 2g of KH550 into the high-speed mixing polytetrafluoroethylene-polyoxymethylene composite particles and continue high-speed mixing for 3 minutes to form a mixture. 2g of graphene was blown into the mixed material being mixed at high speed and continued to mix at high speed for 8 minutes, thereby obtaining a polyoxymethylene polymer composite material. The polyoxymethylene polymer composite material is extruded and granulated by a twin-screw extruder, and the pellets are injected by an injection molding machine to obtain a molding material.

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Abstract

The invention relates to a preparation method of a polyoxymethylene polymer composite material, which comprises the following steps of: mixing polytetrafluoroethylene micro powder and polyoxymethylenemicro powder at a high speed to form polytetrafluoroethylene- polyoxymethylene composite particles; under the condition of high-speed mixing, spraying a silane coupling agent into the formed polytetrafluoroethylene- polyoxymethylene composite particles to form a mixture; and blowing graphene into the mixture under a high-speed mixing condition and continuously mixing at a high speed to obtain thepolyformaldehyde polymer composite material. The invention also provides a polyoxymethylene polymer composite material prepared by using the method and a preparation method of a molding material.

Description

technical field [0001] The invention relates to a polymer composite material and a preparation method thereof, in particular to a polyoxymethylene polymer composite material and a preparation method thereof, and a preparation method of a molding material. Background technique [0002] Polyoxymethylene is a linear polymer with no side chains, high density, and high crystallinity. It has excellent comprehensive properties and has the hardness, strength, and rigidity similar to metals. It is known as "Sai Steel" or "Super Steel". With a lower cost than other engineering plastics, polyoxymethylene is replacing some markets traditionally occupied by metals. It can be widely used in the manufacture of various sliding and rotating mechanical parts, as well as various gears, levers, pulleys, sprockets, and bearings. Wait. However, pure polyoxymethylene has a high friction coefficient and is only suitable for low-temperature and low-load environments, which affects its application e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08L59/00C08L27/18
CPCC08J3/128C08J2359/00C08J2427/18
Inventor 杜鸿达张晓阳陈威郑心纬李宝华康飞宇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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