Release agent theory
In theory, the release agent has greater tensile strength, so that it is in contact with molded resin is often not easy to Polish. Scrubs in the resin filler or glass-fibre reinforced materials in particular. Release agents, chemical resistance, and chemical composition of different resins (especially styrene and amines) does not dissolve upon contact. Release agent also has the properties of heat and stress, is not easy to break down or wear; release agents bond to die does not transfer to be processed on the workpiece, without prejudice to the paint or other secondary process operations. Release agent and principle as follows:
1, the polar bonding and die surface through interactions with regeneration adsorption-type film;
2, polysiloxane Silicon-oxygen bond could be considered weak dipole (Si+-O-), when the release agent in die surface when spreading a single alignment, unique extended chain of molecular configurations;
3, the free surface is covered by alkylation with intensive accumulation, demoulding capacity increases as the alkyl density; but when the alkyl group when a large steric, extension configuration is limited release capacity be reduced;
4, release agent molecular weight and viscosity are also associated with the demoulding ability, molecular weight hour, spreading good, but poor heat tolerance.