High-crystallized and high-temperature-resistant self-lubricating material based on PA66, composite board and preparation method of composite board

A self-lubricating material, PA66 technology, applied in the field of wear-resistant plates, can solve the problems of uneven grain size, affecting wear resistance, reducing mechanical properties, etc., to achieve sufficient grain growth, fast heat transfer, and uniform grain structure and shape effects

Active Publication Date: 2019-07-12
ZHEJIANG CHANGSHENG SLIDING BEARINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the wide application of polymer-based wear-resistant composite materials, customer design requirements and working conditions are getting higher and higher, especially for the wear-resistant properties of materials. The current commonly used polymer-based composite materials are difficult to do.
[0004] PA66 is a kind of thermoplastic resin containing amide groups (—CONH—), which is widely used in the field of friction and wear due to its good wear resistance, but there are problems of fast crystallization and uneven grain size in the process of material production phenomenon, thus affecting its wear resistance
At the same time, due to the fast crystallization speed and uneven grain size, PA66 has high water absorption, which reduces its mechanical properties.

Method used

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  • High-crystallized and high-temperature-resistant self-lubricating material based on PA66, composite board and preparation method of composite board
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  • High-crystallized and high-temperature-resistant self-lubricating material based on PA66, composite board and preparation method of composite board

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preparation example Construction

[0027] The high crystallization high temperature resistant self-lubricating material based on PA66 provided by the invention is composed of PA66, acid anhydride graft modified polyethylene, glass fiber, inorganic filler, nucleating agent and antioxidant. Specifically, the weight percentage of the PA66 is 56.9% to 84.89%, the weight percentage of the anhydride graft modified polyethylene is 5% to 10%, and the weight percentage of the glass fiber is 5% to 15%. The weight percentage of the inorganic filler is 5%-15%, the weight percentage of the nucleating agent is 0.01-0.10%, and the weight percentage of the antioxidant is 0.1%-3%. The PA66 is a kind of thermoplastic resin containing amide groups (—CONH—), which is widely used in the field of friction and wear due to its good wear resistance. As we all know, for a skateboard or a sliding bearing, its anti-friction performance is one of its most important parameters, which determines the life of the skateboard or sliding bearing....

specific Embodiment

[0042] The formula data table of each embodiment of table one

[0043] name PA66 Anhydride graft modified polyethylene Nucleating agent glass fiber Barium sulfate Example 1 59.9 copies 12 copies 0.1 18 copies 10 copies Example 2 69.9 copies 12 copies 0.1 13 copies 5 copies comparative example 100 copies —— —— —— ——

Embodiment 1

[0045] Step 1: Weigh 59.9 parts of PA66, 12 parts of polyethylene with maleic anhydride graft ratio of 3%, 18 parts of sintered glass fiber and 10 parts of barium sulfate, and 0.1 parts of nano-copper powder with a particle size of 80nm share.

[0046] Step 2: Add all the above-mentioned raw materials into a high-speed mixer with a rotation speed of 350 rpm and mix for 20 minutes to obtain a mixture.

[0047] Step 3: Extrude and granulate the above mixture through a twin-screw extruder at an extrusion temperature of 230°C.

[0048] Step 4: Lay the obtained particles on the surface of the plate for melting and sintering, and carry out composite processing at a rolling temperature of normal temperature to obtain a three-layer composite plate with good wear resistance.

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Abstract

The invention discloses a high-crystallized and high-temperature-resistant self-lubricating material based on PA66, a composite board and a preparation method of the composite board. The composite board comprises a base board, a sintering layer and a wear-resistant and high-temperature-resistant self-lubricating layer. The base board and the sintering layer comprise multiple trough holes extendingin the arrangement direction of the base board, the sintering layer and the wear-resistant and high-temperature-resistant self-lubricating layer. Multiple grooves are formed in the contact surface, adjacent to the wear-resistant and high-temperature-resistant self-lubricating layer, of the sintering layer. The wear-resistant and high-temperature-resistant self-lubricating layer is made of the high-crystallized and high-temperature-resistant self-lubricating material based on PA66. The high-crystallized and high-temperature-resistant self-lubricating material based on PA66 consists of PA66, acid anhydride grafted modified polyethylene, glass fiber, inorganic filler, a nucleating agent and an antioxidant. The high-crystallized and high-temperature-resistant self-lubricating material based on PA66 is loaded on the sintering layer in a hot rolling manner. The cooling rate of PA66 becomes lower due to roller heating, so that PA66 obtains longer crystallization time, crystal grains grow sufficiently, and PA66 has better wear resistance and water absorption resistance.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant plates, in particular to PA66-based high-crystallization and high-temperature-resistant self-lubricating materials, composite plates and a preparation method thereof. Background technique [0002] Through special modification, the polymer-based wear-resistant composite material is widely used in the field of friction materials with its excellent anti-friction performance and wear resistance performance, and has excellent advantages such as shock absorption and shock absorption, low noise, light weight, and easy processing. Characteristics, especially in the process of use, it is easy to form a stable transfer film with the abrasive parts, so as to further improve the lubrication effect. [0003] With the wide application of polymer-based wear-resistant composite materials, the requirements for customer design and working conditions are getting higher and higher, especially for the wear-resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L51/06C08K13/06C08K7/14C08K3/08C08K3/30B22F7/04
CPCC08L77/06B22F7/04C08L2201/08C08L2205/24C08K2003/3045C08K2201/016C08K2201/011C08K2003/085C08L51/06C08K13/06C08K7/14C08K3/08C08K3/30
Inventor 薛庆云孙志华陆忠泉
Owner ZHEJIANG CHANGSHENG SLIDING BEARINGS
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