It is understood that rubber release agent is generally divided into external and internal type of two. Traditional release agent is generally external type, that is, coating on the mold cavity surface, it is also known as the isolation agent, the products are mainly talc, mica powder, soap, paraffin, PTFE and silicone oil, they have a certain release effect, but has easy to leave the mold scale and traces, corrosion on the mold, the price is more expensive and other shortcomings. In many kinds of release agents, fluoride and Silicon release agent are two kinds of release agents which have been developed rapidly in recent years because of their good demoulding effect and the suitable mould material.
The main requirements of the release agent are: there is a certain thermal stability and chemical inertia, does not corrode the mold cavity surface, residual decomposition in the mold cavity surface, does not affect the product color, but can give a good appearance, non-toxic, easy to prepare, easy to use.
Rubber release agent refers to a kind of substance used to prevent adhesion between rubber products and mold surfaces and to make them smooth out of mold without tearing. It is sprayed or applied to the surface of the die cavity to form an effective isolation layer. This is the purpose of the rubber release agent.
The rubber release agent is between the mold and the product function material, in the rubber, the plastic manufacture industry, manufactures the model product, in order to release, enhances the production efficiency, the extension mold service life, simultaneously causes the product to be smooth and clean, the size is qualified, reduces the scrap, but needs to use the essential one Its main function is to make the stripping operation easy, prevent forcibly remove the damage caused by the product. The isolation of the release agent depends on its surface properties, its notable feature is that the critical surface tension is small, it is difficult to wetting the liquid, because of this, it can achieve the role of demoulding.
The release agent is a functional substance between the mould and the finished product. Release agents are chemically resistant and are not dissolved when contacted with chemical constituents of different resins (especially styrene and amines). Release agent also has heat and stress performance, not easy to decompose or wear, the release agent adhesion to the mold without transfer to the processed workpiece, do not hinder the painting or other two times processing operation. Because of the rapid development of injection molding, extrusion, calendering, molding, laminating and other processes, the dosage of release agent is also greatly improved.
In theory, the release agent has a larger tensile strength so that it is not easily polished when it is often contacted with molded resins. This is especially true when there are abrasive mineral fillers or fiberglass reinforcing materials in the resin. Release agents are chemically resistant and are not dissolved when contacted with chemical constituents of different resins (especially styrene and amines). Release agent also has heat and stress performance, not easy to decompose or wear, the release agent adhesion to the mold without transfer to the processed workpiece, do not hinder the painting or other two times processing operation.
The role of the release agent is to solidify the molded products smoothly from the mold, so as to get smooth and flat products, and ensure the use of multiple molds