CN103724892A - Low-cost hard-wearing modified polytetrafluoroethylene material for pumps and valves - Google Patents

Abstract

The invention belongs to the field of high polymer materials, and particularly relates to a low-cost hard-wearing modified polytetrafluoroethylene material for pumps and valves. The material is prepared from the following raw materials in parts by weight: 100 parts of polytetrafluoroethylene, 5-8 parts of aluminum oxide, 1-2 parts of aluminum nitride, 3-5 parts of bauxite powder, 2-3 parts of zinc oxide, 1-2 parts of magnesium carbonate and 4-5 parts of an additive. According to the invention, the polytetrafluoroethylene is subjected to filling modification treatment by using the raw materials including the aluminum oxide, the aluminum nitride, the bauxite powder and the like, as a result, the mechanical property of the modified polytetrafluoroethylene is improved; in addition, the cost of the raw materials is low so as to reduce the production cost effectively; the prepared polytetrafluoroethylene material reserves the own excellent performance of polytetrafluoroethylene, and is improved in indexes including hardness, heat resistance, abrasion resistance and the like. Pumps and valve-used devices made of the material, provided by the invention, are long in service lives, safe and reliable.

Description

Low-cost wear-resisting modified teflon material for a kind of pump valve

Technical field

The invention belongs to polymeric material field, be specifically related to a kind of low-cost wear-resisting modified teflon material and preparation method thereof for pump valve.

Background technology

It is little that polytetrafluoroethylmaterial material has frictional coefficient, do not absorb water, difficult combustion, the corrosion-resistant excellent properties feature that waits, main as barrier film in pump valve, sealing member, the multiple device such as sealing friction pair, yet in actual application process, tetrafluoroethylene exists linear expansivity large, poor dimensional stability, poor heat conductivity, easy-cold flow, the shortcoming such as easy-formation not, make it in use have defect, have a strong impact on the performance of pump and valve, therefore, need to carry out modification to tetrafluoroethylene, improve its performance shortcomings, expand use range, increase the service life, guarantee the normal work of pump and valve.

Summary of the invention

The object of the invention is to, low-cost wear-resisting modified teflon material for a kind of pump valve is provided, promoted the mechanical property of polytetrafluoroethylmaterial material, to achieve these goals, the technical solution used in the present invention is as follows:

Low-cost wear-resisting modified teflon material for a kind of pump valve, it is characterized in that, material of the present invention is made by the raw material of following weight part: tetrafluoroethylene 100, aluminium sesquioxide 5-8, aluminium nitride 1-2, bauxitic clay powder 3-5, zinc oxide 2-3, magnesiumcarbonate 1-2, auxiliary agent 4-5.

Described auxiliary agent is made by the raw material of following weight part: attapulgite 30-35, clay 12-15, cuprous chloride 2-3, Graphene 1-2, zinc oxide 5-6, jade 4-5,3-aminopropyl trimethoxysilane 2-3, aluminum nitride powder 4-5, stalk ashes 1-2, dimethyl tin oxide 1-2, tea-polyphenol 1-2; Its preparation method is attapulgite, clay to be put into calcining furnace at 800-830 ℃, calcine 3-4 hour, takes out coolingly, pulverizes, and puts into 12-15% aqueous hydrochloric acid, soaks 1-2 hour, filters, and with clear water washing, dries and get final product; The powder of drying is mixed with other surplus stock, and grinding distribution 2-3 hour, obtains.

Low-cost wear-resisting modified teflon material for described a kind of pump valve, its production technique is:

(1) tetrafluoroethylene is pulverized standby;

(2) material of (1) is mixed with aluminium sesquioxide, aluminium nitride, bauxitic clay powder, zinc oxide, in water medium, be ground to 200-400 order, the powder dry for standby obtaining;

(3) magnesiumcarbonate is ground to 200-400 order, adds together with auxiliary agent in the material of (2), after being uniformly mixed, through compression molding, high temperature sintering, machining and get final product.

The invention has the advantages that: utilize the raw materials such as aluminium sesquioxide, aluminium nitride, bauxitic clay powder to carry out filling-modified processing to tetrafluoroethylene, its mechanical property is improved, the material of preparation has not only acted on the good performance of tetrafluoroethylene itself, the indexs such as its hardness, resistance toheat, abrasion resistance properties are all improved, and modified filler is with low cost, effectively controlled production cost, pump prepared by modified teflon material of the present invention, valve device, long service life, safe and reliable.

Embodiment

Embodiment

The present embodiment material is made by following weight part raw material: tetrafluoroethylene 100, aluminium sesquioxide 6, aluminium nitride 2, bauxitic clay powder 5, zinc oxide 3, magnesiumcarbonate 2, auxiliary agent 5.

Described auxiliary agent is made by the raw material of following weight part: attapulgite 30, clay 12, cuprous chloride 2, Graphene 1, zinc oxide 5, jade 4,3-aminopropyl trimethoxysilane 2, aluminum nitride powder 5, stalk ashes 2, dimethyl tin oxide 1, tea-polyphenol 1; Its preparation method is attapulgite, clay to be put into calcining furnace at 800-830 ℃, calcine 3-4 hour, takes out coolingly, pulverizes, and puts into 12-15% aqueous hydrochloric acid, soaks 1-2 hour, filters, and with clear water washing, dries and get final product; The powder of drying is mixed with other surplus stock, and grinding distribution 2-3 hour, obtains.

Low-cost wear-resisting modified teflon material for described a kind of pump valve, its production technique is:

(1) tetrafluoroethylene is pulverized standby;

(2) material of (1) is mixed with aluminium sesquioxide, aluminium nitride, bauxitic clay powder, zinc oxide, in water medium, be ground to 400 orders, the powder dry for standby obtaining;

(3) magnesiumcarbonate is ground to 400 orders, adds together with auxiliary agent in the material of (2), after being uniformly mixed, through compression molding, high temperature sintering, machining and get final product.

The main technical details of material of the present invention is as follows:

Average wear factor is 2.3 * 10-5g/h, compressive strength 48MPa, compressive modulus of elasticity 1466MPa, flexural strength 18MPa, quality wear rate 0.21%, thermal expansivity (room temperature ~ 250 ℃) 11.6 (10-5/ ℃), permanent set 0.8%.

Claims (2)

1. a low-cost wear-resisting modified teflon material for pump valve, it is characterized in that, this material is made by the raw material of following weight part: tetrafluoroethylene 100, aluminium sesquioxide 5-8, aluminium nitride 1-2, bauxitic clay powder 3-5, zinc oxide 2-3, magnesiumcarbonate 1-2, auxiliary agent 4-5;

Described auxiliary agent is made by the raw material of following weight part: attapulgite 30-35, clay 12-15, cuprous chloride 2-3, Graphene 1-2, zinc oxide 5-6, jade 4-5,3-aminopropyl trimethoxysilane 2-3, aluminum nitride powder 4-5, stalk ashes 1-2, dimethyl tin oxide 1-2, tea-polyphenol 1-2; Its preparation method is attapulgite, clay to be put into calcining furnace at 800-830 ℃, calcine 3-4 hour, takes out coolingly, pulverizes, and puts into 12-15% aqueous hydrochloric acid, soaks 1-2 hour, filters, and with clear water washing, dries and get final product; The powder of drying is mixed with other surplus stock, and grinding distribution 2-3 hour, obtains.

2. low-cost wear-resisting modified teflon material for a kind of pump valve as claimed in claim 1, its production technique is:

(1) tetrafluoroethylene is pulverized standby;

(2) material of (1) is mixed with aluminium sesquioxide, aluminium nitride, bauxitic clay powder, zinc oxide, in water medium, be ground to 200-400 order, the powder dry for standby obtaining;

(3) magnesiumcarbonate is ground to 200-400 order, adds together with auxiliary agent in the material of (2), after being uniformly mixed, through compression molding, high temperature sintering, machining and get final product.