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Aluminum nitride filled and modified polytetrafluoroethylene material for pumps and valves

A technology of polytetrafluoroethylene and aluminum nitride, which is applied in the field of aluminum nitride-filled modified polytetrafluoroethylene materials for pump valves and its preparation, can solve problems such as poor dimensional stability, flame retardancy, and small friction coefficient, and achieve Improved high temperature resistance, excellent wear resistance, and improved mechanical properties

Inactive Publication Date: 2014-04-30
ANHUI NANFANG CHEM PUMP IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] PTFE material has excellent performance characteristics such as small friction coefficient, non-absorbent, flame retardant, and corrosion resistance. It is mainly used in various devices such as diaphragms, seals, and sealing friction pairs in pump valves. However, in actual applications , PTFE has disadvantages such as large linear expansion coefficient, poor dimensional stability, poor thermal conductivity, easy cold flow, and difficult to form, which make it defective during use and seriously affect the performance of pumps and valves. Therefore, it is necessary to use polytetrafluoroethylene Vinyl fluoride is modified to improve its performance shortcomings, expand the scope of use, prolong the service life, and ensure the normal operation of pumps and valves

Method used

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Embodiment

[0012] The material in this embodiment is made of the following raw materials in parts by weight: polytetrafluoroethylene 100, aluminum nitride 3, zinc molybdate 2, aluminum dihydrogen phosphate 4, boron carbide 3, ferrous sulfate 2, and additive 5.

[0013] The auxiliary agent is made of the following raw materials in parts by weight: attapulgite 30, clay 12, molybdenum trioxide 1, nano clay 10, titanium dioxide 2, silane coupling agent KH550 1, aluminum oxide 4, zinc borate 2 , corundum powder 3; the preparation method is to put attapulgite and clay into a calciner and calcinate at 800-830°C for 3-4 hours, take it out and cool it, crush it, put it in 12-15% hydrochloric acid aqueous solution, soak it for 1- After 2 hours, filter, wash with water, and dry to obtain the product; mix the dried powder with other remaining raw materials, grind and disperse for 2-3 hours to obtain the product.

[0014] The described a kind of pump valve uses aluminum nitride to fill the modified p...

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PUM

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Abstract

Belonging to the field of high polymer materials, the invention in particular relates to an aluminum nitride filled and modified polytetrafluoroethylene material for pumps and valves. The material is made of the following raw materials by weight part: 100 of polytetrafluoroethylene, 2-3 of aluminum nitride, 1-2 of zinc molybdate, 3-4 of aluminium dihydrogen phosphate, 2-3 of boron carbide, 1-2 of ferrous sulfate, and 4-5 of an additive. According to the invention, aluminum nitride, zinc molybdate, boron carbide and other as raw materials are utilized to perform filling modification treatment on polytetrafluoroethylene, thus improving the mechanical properties. On the basis of adhering to the excellent properties of polytetrafluoroethylene itself, the hardness, wear resistance, corrosion resistance, high temperature resistance and other properties of polytetrafluoroethylene are all improved, and especially the polytetrafluoroethylene material has excellent wear resistance. The devices used for pumps and valves and prepared from the polytetrafluoroethylene material provided by the invention have long service life, and are safe and reliable.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a modified polytetrafluoroethylene material filled with aluminum nitride for pump valves and a preparation method thereof. Background technique [0002] PTFE material has excellent performance characteristics such as small friction coefficient, non-absorbent, flame retardant, and corrosion resistance. It is mainly used in various devices such as diaphragms, seals, and sealing friction pairs in pump valves. However, in actual applications , PTFE has disadvantages such as large linear expansion coefficient, poor dimensional stability, poor thermal conductivity, easy cold flow, and difficult to form, which make it defective during use and seriously affect the performance of pumps and valves. Therefore, it is necessary to use polytetrafluoroethylene Vinyl fluoride is modified to improve its performance shortcomings, expand the scope of use, prolong the service life, and e...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08K13/06C08K9/00C08K9/02C08K3/34C08K3/28C08K3/24C08K3/32C08K3/38C08K3/30
Inventor 潘耀东
Owner ANHUI NANFANG CHEM PUMP IND