Corundum-filled carbon nano-teflon valve sealing ring

Abstract

The invention discloses a corundum-filled carbon nano-teflon valve sealing ring. The corundum-filled carbon nano-teflon valve sealing ring is prepared from, by weight, 100 parts of teflon, 5-8 parts of carbon nano-tubes, 8-10 parts of phenol, 8-10 parts of 4-methylbenzoic acid, 1-2 parts of bentonite, 5-8 parts of diphenyl ether, 1-3 parts of butyl titanate, 20-25 parts of 60-70% sodium hypochlorite, 20-25 parts of EDTA, 40-50 parts of ammonium hydroxide, 80-100 parts of absolute ethyl alcohol, 3-5 parts of superfine corundum powder, 2-4 parts of potassium hexatitanate power, 1-2 parts of molybdenum disulfide, 1-3 parts of a silane coupling agent kh550, 9-10 parts of ammonium chloride, 30-35 parts of urea and 30-35 parts of water. According to the corundum-filled carbon nano-teflon valve sealing ring, teflon is filled with superfine corundum powder and polybenzoate-modified carbon fibers, and thus the strength and abrasion resistance of teflon are significantly improved.

Description

technical field [0001] The invention belongs to the field of valve sealing rings, and in particular relates to a corundum-filled polytetrafluoroethylene valve sealing ring and a preparation method and application thereof. Background technique [0002] Corundum Al 2 o 3 There are three main variants of the homogeneous image, which are α-Al 2 o 3 , β-Al 2 o 3 , γ-Al 2 o 3 . Corundum is second only to diamond in hardness. It has the characteristics of high temperature resistance, corrosion resistance, high strength, high temperature insulation, high hardness, good wear resistance, and high strength. Corundum products have good air tightness and are airtight even at high temperatures, so they are widely used in metallurgy , machinery, chemical industry, electronics, aviation and national defense and many other industrial fields. [0003] Polytetrafluoroethylene (PTFE) is characterized by its high chemical stability, strong high and low temperature resistance, outstandi...

AI Technical Summary

Problems solved by technology

[0003] Polytetrafluoroethylene (PTFE) is characterized by its high chemical stability, strong high and low temperature resistance, outstanding non-stickiness, good lubricity, excellent electrical insulation, aging resistance, minimal water absorption, etc. , making it widely used in aerospace, petrochemical, mechanical industry, electronic appliances, food industry, textile and other fields. However, due to its poor mechanical properties, large linear expansion coefficient, poor creep resistance, poor wear resistance, low hardness, and difficulties in forming and secondary processing, its application range is limited to a certain extent.