Fluoroplastic compound product and its making method

Abstract

The invention involves fluorine plastic liner manufacturing and application technology, particularly a fluorine plastic lining composite product and its manufacturing method. Its characteristic is: it contains glass fibers, fluorinated ethylenepropylene copolymer and PTFE, they are coiled on stainless steel supporting mold consecutively, then the out surface is coiled with alkali-free glass fiber belts, it is pressed and sintered in high-temperature and molten condition, fluorinated ethylenepropylene copolymer permeates into the glass fiber gap laid on surface, cooling out furnace, disassembling the alkali-free glass fiber belts and demolding, then the product is completed or is sheared into sheets. It aims at designing a fluorine plastic composite product which can process the fluorine plastic and metal components with lining on site and its production method. The invention fills the technology gap of large equipment can not process PTFE with lining, reduces a lot of costs of electricity, coal energy and transportation, greatly expands PTFE lining equipment application scope, and plays a positive role of replacing the products made by expensive rare metals materials.

Description

technical field [0001] The invention relates to the manufacture and application technology of a fluoroplastic lining, in particular to a fluoroplastic composite product and a manufacturing method thereof. Background technique [0002] Fluoroplastics are high molecular polymers with precise molecular structure and high density. Its molecular weight is above 12,000. Because its carbon bonds are all fluorinated, it is resistant to almost all chemical media (except high-temperature molten alkali metals and elemental fluorine), and it does not work for chemical media reactions at temperatures of -80°C-200°C. , is an excellent material resistant to strong corrosive media, but fluoroplastics are thermoplastic materials with a large thermal expansion coefficient, about ten times that of steel, and cannot be directly bonded to steel components, so that their due specificity cannot be applied. Some effect. [0003] DuPont Corporation of the United States, Daikin Corporation of Japan...

AI Technical Summary

Problems solved by technology

Because its carbon bonds are all fluorinated, it is resistant to almost all chemical media (except high-temperature molten alkali metals and elemental fluorine), and it does not work for chemical media reactions at temperatures of -80°C-200°C. , is an excellent material resistant to strong corrosive media, but fluoroplastics are thermoplastic materials with a large thermal expansion coefficient, about ten times that of steel, and cannot be directly bonded to steel components, so that their due specificity cannot be applied. Some role

[0003] DuPont Corporation of the United States, Daikin Corporation of Japan, Burnemen Corporation of the United Kingdom, Dow Chemical Corporation of the United States, Wude Company of Germany and existing domestic manufacturers have failed to achieve direct bonding between the fluoroplastic lining layer and the surface of the metal component, let alone achieve On-site construction of fluoroplastic lining products

[0004] At present, the manufacturing of fluoroplastic lined equipment containers, towers, and kettles in the world can only use hot rolling lining, loose lining, and surface naphthalene sodium treatment, high-temperature pressurized sintering and compounding, but there are many shortcomings: 1. Large energy consumption

Heated lining sintering requires a 40KV sintering furnace to work continuously for 20 hours, and the power consumption reaches 800 degrees; 2. The operator must work in a high temperature environment, and the production labor intensity is high; 3. The high temperature sintering process takes a long time and the work efficiency is low ; 3. Due to the poor thermal stability of fluoroplastics and the large thermal deformation coefficient, it is sometimes hot and cold during the application process, which will easily cause the lining layer to be deformed and cannot be used, and the service life is short; 4. The fluoroplastic lining layer relies on its own thickness to increase its strength, greatly The increase of manufacturing cost and waste of energy; 5. The above-mentioned processing method cannot be applied to anti-corrosion lining of large equipment

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