Use of release agent
1. Classification by usage: internal release agent and external release agent;
2. Classification by service life: conventional release agent and half long release agent;
3. Classification by form: solvent-based release agent, water-based release agent, solvent-free release agent, powder release agent and paste release agent 4 Classification by active substance:
① Silicon series - mainly silicone compound, silicone oil, silicone resin methyl branched silicone oil, methyl silicone oil, emulsified methyl silicone oil, hydrogen containing methyl silicone oil, silicone grease, silicone resin, silicone rubber, silicone rubber toluene solution
② Wax series - plant, animal, synthetic paraffin; Microcrystalline paraffin; Polyethylene wax, etc.
③ Fluorine series - polytetrafluoroethylene with good isolation performance, little pollution to the mold, but high cost; Fluororesin powder; Fluororesin coating, etc
④ Surfactant series - metal soap (anionic), EO, Po derivatives (non-ionic)
⑤ Inorganic powder series - talc, mica, clay, white clay, etc
⑥ Polyether series - a mixture of polyether and fat. It has good heat resistance and chemical properties. It is mostly used in some rubber industries with restrictions on silicone oil. The cost is higher than that of silicone oil series.
Other aqueous release agents containing masking agent: fix water molecules with masking agent, durable release agent: silicone oil + silicone resin system, multi-layer composite release agent for more than 800 times: halogenated hydrocarbon film + polyethylene release agent + polyvinyl alcohol release agent, aromatic polysulfone release agent, mold treatment release agent, halopolyether release agent: reduce vapor pressure and increase decomposition temperature, Carbonyl alkyl silane release agent that will not cause charged contact: internal release, improve the adhesion to the surface of water-based ink. Reactive release agent: after coating, it will form a film by chemical reaction and adhere to the mold surface at the same time. The above are some representative release agents, which have their own characteristics and can be used separately according to their uses.
for example, it is used as the back treatment agent, stripping paper, anti adhesion agent (electric pole, telephone box, signboard, sign) of fiber adhesive tape, etc., and anti pollution (inner and outer wall finishing, vehicle, barricade, etc.) to prevent the residual adhesion around the adhesive.