CN103756211A - Anticorrosion and temperature resistant modified polytetrafluoroethylene material for pumps and valves - Google Patents

Abstract

Belonging to the field of high polymer materials, the invention in particular relates to an anticorrosion and temperature resistant modified polytetrafluoroethylene material for pumps and valves. The material is made of the following raw materials by weight part: 150 of polytetrafluoroethylene, 1-2 of attapulgite powder, 5-7 of zinc oxide, 1-2 of mica powder, 2-3 of carbon black, 3-4 of silver vanadate, and 4-5 of an additive. According to the invention, attapulgite powder, mica powder, carbon black and other raw materials are employed to perform filling modification treatment on polytetrafluoroethylene, thus effectively improving the mechanical properties. On the basis of adhering to the excellent properties of polytetrafluoroethylene itself, all indexes of polytetrafluoroethylene are improved. The devices used for pumps and valves and prepared from the polytetrafluoroethylene material provided by the invention are applicable to a variety of use conditions, and are durable in use, safe and reliable.

Description

Anticorrosion heatproof modified teflon material for a kind of pump valve

Technical field

The invention belongs to polymeric material field, be specifically related to anticorrosion heatproof modified teflon material and preparation method thereof for a kind of 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, anticorrosion heatproof 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:

Anticorrosion heatproof 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 150, attapulgite powder 1-2, zinc oxide 5-7, mica powder 1-2, carbon black 2-3, vanadic acid silver 3-4, auxiliary agent 4-5.

Described auxiliary agent is made by the raw material of following weight part: attapulgite 30-35, clay 12-15, molybdic oxide 1-2, nanometer potter's clay 10-12, titanium dioxide 1-2, Silane coupling agent KH550 1-2, aluminium sesquioxide 3-4, zinc borate 1-2, lapis amiridis 3-4; 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.

Anticorrosion heatproof 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 other raw material except auxiliary agent, in water medium, be ground to 200-400 order, the powder dry for standby obtaining;

(3) auxiliary agent is added 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 attapulgite powder, mica powder, carbon black to carry out filling-modified processing to tetrafluoroethylene, powder is uniformly dispersed, its mechanical property improves, the material of preparation has not only acted on the good performance of tetrafluoroethylene itself, its hardness, Corrosion Protection, Wear-resistant, high-temperature resistant performance all improve, pump prepared by modified teflon material provided by the invention, valve device, long service life, safe and reliable.

Embodiment

Embodiment

The present embodiment material is made by following weight part raw material: tetrafluoroethylene 150, attapulgite powder 2, zinc oxide 6, mica powder 2, carbon black 3, vanadic acid silver 4, auxiliary agent 5.

Described auxiliary agent is made by the raw material of following weight part: attapulgite 30, clay 12, molybdic oxide 1, nanometer potter's clay 10, titanium dioxide 2, Silane coupling agent KH550 1, aluminium sesquioxide 4, zinc borate 2, lapis amiridis 3; 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.

Anticorrosion heatproof 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 other raw material except auxiliary agent, in water medium, be ground to 400 orders, the powder dry for standby obtaining;

(3) auxiliary agent is added 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%.Use temperature scope :-60 ℃-330 ℃.

Claims (2)

1. an anticorrosion heatproof modified teflon material for pump valve, it is characterized in that, this material is made by the raw material of following weight part: tetrafluoroethylene 150, attapulgite powder 1-2, zinc oxide 5-7, mica powder 1-2, carbon black 2-3, vanadic acid silver 3-4, auxiliary agent 4-5;

Described auxiliary agent is made by the raw material of following weight part: attapulgite 30-35, clay 12-15, molybdic oxide 1-2, nanometer potter's clay 10-12, titanium dioxide 1-2, Silane coupling agent KH550 1-2, aluminium sesquioxide 3-4, zinc borate 1-2, lapis amiridis 3-4; 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. anticorrosion heatproof 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 other raw material except auxiliary agent, in water medium, be ground to 200-400 order, the powder dry for standby obtaining;

(3) auxiliary agent is added in the material of (2), after being uniformly mixed, through compression molding, high temperature sintering, machining and get final product.