Polytetrafluoroethylene composite material for mechanical seal and preparation method of polytetrafluoroethylene composite material for mechanical seal

A technology of polytetrafluoroethylene and polytetrafluoroethylene micropowder, which is applied in the field of polytetrafluoroethylene composite materials for mechanical seals and its preparation, can solve the problems of long processing cycle, large high temperature creep, and poor rebound performance, and achieve Excellent anti-wear ability, good service life and good application prospects

Inactive Publication Date: 2016-04-20
桐乡市搏腾贸易有限公司
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PTFE sealing products produced by this method have poor mechanical properties at high temperatures, large high-temperature creep, large wear, poor resilience performance, poor product dimensional accuracy, long processing cycle, and low production efficiency. , low material utilization and other shortcomings

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polytetrafluoroethylene composite material for mechanical seal and preparation method of polytetrafluoroethylene composite material for mechanical seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In the embodiment of the present invention, a polytetrafluoroethylene composite material for mechanical seals is composed of the following components in parts by weight: 48 parts of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, 35 parts of butadiene rubber , 2 parts of chlorinated polyethylene, 2.2 parts of polyacrylonitrile-based carbon fiber, 0.8 parts of polytetrafluoroethylene micropowder, 1.6 parts of anti-aging agent DNP, 0.5 parts of stearic acid, 8 parts of flame retardant, 0.6 parts of auxiliary crosslinking agent, 2.6 parts of plasticizer, 0.8 parts of bismuth oxide; the melting point of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer is 320-335 °C; the diameter of polyacrylonitrile-based carbon fiber is 4.5-5.8 μm, and the aspect ratio is 12 -16; the particle size of polytetrafluoroethylene powder is 1-3μm; the mass fraction of chlorine in chlorinated polyethylene is 28-32%; the flame retardant is magnesium hydroxide modified by silane cou...

Embodiment 2

[0026] In the embodiment of the present invention, a polytetrafluoroethylene composite material for mechanical seals consists of the following components in parts by weight: 55 parts of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, 22 parts of butadiene rubber , 6 parts of chlorinated polyethylene, 1.5 parts of polyacrylonitrile-based carbon fiber, 1.5 parts of polytetrafluoroethylene powder, 1.2 parts of anti-aging agent DNP, 0.8 parts of stearic acid, 5 parts of flame retardant, 0.9 parts of auxiliary crosslinking agent, 2.2 parts of plasticizer, 1.2 parts of bismuth oxide; the melting point of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer is 320-335 °C; the diameter of polyacrylonitrile-based carbon fiber is 4.5-5.8 μm, and the aspect ratio is 12 -16; the particle size of polytetrafluoroethylene powder is 1-3μm; the mass fraction of chlorine in chlorinated polyethylene is 28-32%; the flame retardant is aluminum hydroxide modified by silane coupling age...

Embodiment 3

[0029] In the embodiment of the present invention, a polytetrafluoroethylene composite material for mechanical seals is composed of the following components in parts by weight: 50 parts of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, 32 parts of butadiene rubber , 3 parts of chlorinated polyethylene, 1.8 parts of polyacrylonitrile-based carbon fiber, 1.2 parts of polytetrafluoroethylene powder, 1.4 parts of anti-aging agent DNP, 0.6 parts of stearic acid, 6.5 parts of flame retardant, 0.7 parts of auxiliary crosslinking agent, 2.5 parts of plasticizer, 0.9 parts of bismuth oxide; the melting point of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer is 320-335 °C; the diameter of polyacrylonitrile-based carbon fiber is 4.5-5.8 μm, and the aspect ratio is 12 -16; the particle size of polytetrafluoroethylene powder is 1-3μm; the mass fraction of chlorine in chlorinated polyethylene is 28-32%; the flame retardant is magnesium hydroxide modified by silane coupli...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a polytetrafluoroethylene composite material for mechanical seal and a preparation method of the polytetrafluoroethylene composite material for mechanical seal. The polytetrafluoroethylene composite material is prepared from, by weight, 48-55 parts of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, 22-35 parts of polybutadiene, 2-6 parts of chlorinated polyethylene, 1.5-2.2 parts of polyacrylonitrile-based carbon fiber, 0.8-1.5 parts of polytetrafluoroethylene micropowder, 1.2-1.6 parts of antioxidant DNP, 0.5-0.8 part of stearic acid, 5-8 parts of fire retardant, 0.6-0.9 part of assistant crosslinker, 2.2-2.6 parts of plasticizer and 0.8-1.2 parts of bismuth oxide by mixing, granulating, extrusion molding, radiation crosslinking and post processing. The polytetrafluoroethylene composite material is low in friction coefficient, abrasion loss and creep rate and has excellent abrasion resistance and long service life. Compared with a traditional polytetrafluoroethylene seal ring made by mould pressing, a seal ring made of the polytetrafluoroethylene composite material has the advantages of remarkable leakage reduction and promising application prospect.

Description

technical field [0001] The invention relates to the technical field of mechanical materials, in particular to a polytetrafluoroethylene composite material for mechanical sealing and a preparation method thereof. Background technique [0002] Tetrafluoroethylene products are made of polytetrafluoroethylene resin, which is sintered after cold pressing with a mold. It has excellent corrosion resistance, good self-lubrication and non-sticking properties. Therefore, the product is resistant to almost all chemical media, and has the characteristics of wear resistance, pressure resistance, and low friction coefficient. It is widely used in petroleum, chemical metallurgical machinery, transportation, medicine, food, electric power and many other fields. [0003] PTFE has excellent chemical stability, wide operating temperature range, good corrosion resistance and other excellent properties and is widely used in chemical industry, medicine, environmental protection, nuclear industry...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L9/00C08L23/28C08K13/06C08K9/06C08K7/06C08K5/09C08K5/12C08K3/22C09K3/10
CPCC08L27/18C08L2205/02C08L2205/035C09K3/1009C09K3/1028C09K2200/0607C09K2200/0637
Inventor 沈美珍
Owner 桐乡市搏腾贸易有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap