CN103756207A - Heat-resistant modified polytetrafluoroethylene material for pump valve - Google Patents

Abstract

The invention belongs to the field of polymer materials, and particular relates to a heat-resistant modified polytetrafluoroethylene material for a pump valve. The material is prepared from the following raw materials by weight: 100 parts of polytetrafluoroethylene, 2-3 parts of titanium dioxide powder, 3-4 parts of precipitated barium sulfate, 2-3 parts of aluminum silicate, and 4-5 parts of an auxiliary agent. According to the present invention, titanium dioxide powder, precipitated barium sulfate, aluminum silicate and other raw materials are adopted to carry out a reinforcement treatment on polytetrafluoroethylene, such that the mechanical property is improved, the heat resistance is effectively increased based on maintaining of the excellent performances of polytetrafluoroethylene, and the wear resistance is further improved; and the production cost is low, and the prepared devices for pumps and valves have characteristics of long service life, safety and reliability.

Description

The heat resistance modified polytetrafluoroethylmaterial material of a kind of pump valve

Technical field

The invention belongs to polymeric material field, be specifically related to a kind of heat resistance modified polytetrafluoroethylmaterial 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, but in actual application process, tetrafluoroethylene exists linear expansivity large, poor dimensional stability, poor heat conductivity, easy-cold flow, the not shortcoming such as easy-formation, 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, provide a kind of pump valve heat resistance modified polytetrafluoroethylmaterial material, promoted the mechanical property of polytetrafluoroethylmaterial material, to achieve these goals, the technical solution used in the present invention is as follows:

The heat resistance modified polytetrafluoroethylmaterial material of a kind of pump valve, is characterized in that, material of the present invention is made by the raw material of following weight part: tetrafluoroethylene 100, titanium dioxide 2-3, process white 3-4, pure aluminium silicate 2-3, 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.

The described heat resistance modified polytetrafluoroethylmaterial material of a kind of pump valve, its production technique is:

(1) tetrafluoroethylene is pulverized standby;

(2) material of (1) is mixed with titanium dioxide, pure aluminium silicate, under the condition at water as medium, be ground to 200-400 order, the powder dry for standby obtaining;

(3) process white 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 titanium dioxide, process white, pure aluminium silicate to carry out enhancement process to tetrafluoroethylene, its mechanical property is improved, the material of preparation has not only acted on the good performance of tetrafluoroethylene itself, its resistance toheat is improved, antiwear property also must improve, and production cost is low, pump, valve device prepared by this modified teflon material, long service life, safe and reliable.

Embodiment

Embodiment

The present embodiment material is made by following weight part raw material: tetrafluoroethylene 100, titanium dioxide 3, process white 4, pure aluminium silicate 3, 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.

The described heat resistance modified polytetrafluoroethylmaterial material of a kind of pump valve, its production technique is:

(1) tetrafluoroethylene is pulverized standby;

(2) material of (1) is mixed with titanium dioxide, pure aluminium silicate, under the condition at water as medium, be ground to 400 orders, the powder dry for standby obtaining;

(3) process white 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. the heat resistance modified polytetrafluoroethylmaterial material of pump valve, is characterized in that, this material is made by the raw material of following weight part: tetrafluoroethylene 100, titanium dioxide 2-3, process white 3-4, pure aluminium silicate 2-3, 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. the heat resistance modified polytetrafluoroethylmaterial material of 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 titanium dioxide, pure aluminium silicate, under the condition at water as medium, be ground to 200-400 order, the powder dry for standby obtaining;

(3) process white 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.