In theory, the release agent has a large tensile strength, so that it is not easy to polish in regular contact with the molding resin.This is especially true when there is a ground mineral filler or glass fiber reinforcement in the resin.The release agent is chemically resistant and will not be dissolved in contact with the chemical components of different resins (especially styrene and amines).Release agent also has heat resistance and stress properties, not easy to decompose or wear;The release agent is bonded to the mold without transfer to the part being machined and does not interfere with painting or other secondary processing operations.The specific action principle of the release agent is as follows:

1. The polar chemical bond interacts with the die surface to form an adsorption film with regenerative force;

2. The si-o bond in polysiloxane can be regarded as a weak dipole (Si+-O-). When the release agent is spread out in a single orientation on the surface of the mold, the molecule adopts a unique extended chain configuration.

3. The free surface is covered by alkyl in dense packing mode, and the demoulding ability increases with the density of alkyl.However, when alkyl group occupies a large steric hindrance, the extensional configuration is limited and the demoulding ability decreases.

4. The molecular weight and viscosity of the demoulding agent are also related to the demoulding ability. When the molecular weight is small, the spread is good, but the heat resistance is poor.