The demolding and protective effects of release agents on molded products

Release agent is a processing aid that is mainly used for demolding. He is a functional substance between molds and finished products, which can effectively prevent molded products, laminated products, etc. made of rubber, plastic, elastomers, or other materials from sticking to molds or other surfaces, and serves as a type of processing aid that is easy to detach.

The demolding effect of release agents on molded products has social reasons. Due to the rapid development of injection molding, extrusion, rolling, compression molding, lamination and other processes, the amount of release agent used has also been greatly increased. Commonly used ones include silicone oil, silicone rubber, emulsified silicone oil, and silicone grease. Organic silicone release agent is currently the mainstream product in the mid-range market of rubber and plastic release agents, widely used in the processing of resins such as polyurethane, rubber, polyethylene, and polyvinyl chloride. Spray or apply it onto the surface of the mold cavity during use to form an effective isolation layer. The main requirements for release agents are: they have certain thermal stability and chemical inertness, and do not corrode the surface of the mold cavity; Residual decomposition products under the surface of the mold cavity; Does not affect the color of the product, but can give it a good appearance and is non-toxic; Easy to configure and convenient to use. There are many domestic factories producing silicone release agents, but their scale is relatively small and they still lack large brands that can dominate the market.

The isolation of release agents depends on their surface properties, which are characterized by low critical surface tension and difficulty in being wetted by liquids. This is why the release effect can be achieved. Rubber release agent refers to a type of substance used to prevent adhesion between rubber products and mold surfaces, and to ensure smooth demolding without tearing. The use of release agent during the demolding process can make the product smooth, make the demolding operation more convenient, prevent accidental damage to the product during demolding, and reduce the generation of waste products.