目前适合的涂覆工艺大概有以下几种：
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Surface Treatment of Substrate in PTFE Coating Spraying Process
PTFE is its non-stick, which is a solid material with the smallest surface energy. This feature also makes its application in coatings produce a series of problems. If you want to directly use PTFE dispersion coating, it can not be effectively attached to the surface of the substrate, to the preparation of PTFE coating application, we must first solve the chemical activity of the coating and the adhesion to the substrate problem. At present, the suitable coating process is probably the following:
- Anchor Route: The Act is also known"roughening method", in order to roughen the surface of the substrate and produce anchoring effect, the substrate is degreased in advance (the method includes solvent method, surfactant method, electrolysis method and thermal decomposition method, etc.), then sandblasting cleaning, and then roughening by chemical or physical methods to produce concave and convex, etching or porous film.
- primer route: PTFE to join some adhesives and additives, made of primer, coated on the substrate, and then coated with fluorine resin. The primer contains a fluororesin, a binder, a coalescing agent, and a liquid carrier. Adhesives are mainly silicates of alkali metals (potassium, sodium, and potassium), amine salts of polyphthalic acid, and polyphenylene sulfide. The coalescing agent is usually an organic solvent capable of dissolving the polyphthalamide salt, suchNmonomethyl pyrrole, dimethyl phthalamide, etc. The carrier uses conventional reagents that require it to each component.no reaction, and can all volatile, does not affect the performance of the coating.
- combination route: This route focuses on the addition of certain additives., modifiers or other fillers, etc., to increase.plus polytetrafluoroethylene to substrate, heat resistance, abrasion resistance, chemical stability, and the like are improved. Additives and modifiers., including inorganic metal oxides, water glass, organic metal chelates and polymertype of acrylic resin, epoxy resin, silicone resin, polyphthalamide, polyphenylene sulfide, etc. Above3modifiers is called filling modification, superfluous compound modification and resin modification, respectively. Some of the modified coatings can double as primers., yes.can be applied directly on pretreated substrates, the latter is called"disposable paint".
- Comprehensive route: in order to improve the performance of anti-adhesive coatings, can take two or three of the above routes, calledintegrated route.
Teflon spraying process
Created on：2022-08-17
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