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Creep-resistant PET-modified polytetrafluoroethylene material for pump valve

A polytetrafluoroethylene and creep-resistant technology, which is applied in the field of creep-resistant PET modified polytetrafluoroethylene materials for pumps and valves and its preparation, can solve the problems of flame retardancy, poor dimensional stability, and small friction coefficient, and achieve Improved wear resistance, long service life, and improved mechanical properties

Active Publication Date: 2014-04-30
安徽凯特泵业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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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 of this embodiment is made of the following raw materials in parts by weight: polytetrafluoroethylene powder 100, PET 14, silicon dioxide 4, nano-corundum powder 2, potassium hexatitanate powder 4, and additives 5.

[0013] The auxiliary agent is made of the following raw materials in parts by weight: attapulgite 30, clay 12, cuprous chloride 2, graphene 1, zinc oxide 5, jade 4, 3-aminopropyltrimethoxysilane 2, Aluminum nitride powder 5, straw ashes 2, dimethyl tin oxide 1, tea polyphenol 1; the preparation method is to put attapulgite and clay into a calciner and calcinate at 800-830°C for 3-4 hours, take out Cool, pulverize, put in 12-15% hydrochloric acid aqueous solution, soak for 1-2 hours, filter, wash with clean water, and dry to get the product; mix the dried powder with other remaining raw materials, grind and disperse for 2-3 hours, that is have to.

[0014] The creep-resistant PET modified polytetrafluoroethylene material for a pump valve, its p...

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Abstract

The invention belongs to the field of polymer materials, and particular relates to a creep-resistant PET-modified polytetrafluoroethylene material for a pump valve. The material is prepared from the following raw materials by weight: 100 parts of polytetrafluoroethylene powder, 12-14 parts of PET, 2-4 parts of silicon dioxide, 1-2 parts of nanometer corundum powder, 2-4 parts of potassium hexatitanate powder, and 4-5 parts of an auxiliary agent. According to the present invention, PET, nanometer corundum powder and other raw materials are adopted to carry out a modification reinforcement treatment on polytetrafluoroethylene, such that the mechanical property is improved, the prepared material has the excellent performances of polytetrafluoroethylene, and the hardness, the creep resistance, the wear resistance and other indicators are increased; and the devices prepared from the modified polytetrafluoroethylene material and provided for pumps and valves have characteristics of long service life, safety and reliability.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a creep-resistant PET modified polytetrafluoroethylene material 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 ensure the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L67/02C08K13/06C08K9/00C08K9/02C08K3/34C08K3/22C08K3/16C08K3/04C08K3/28C08K5/1545
Inventor 汪卫平唐训民
Owner 安徽凯特泵业有限公司
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