Built-in release agents, also known as internal release agents, are chemical substances added within the polymer material system. They are primarily used to reduce the adhesion between the mold and the molded product, thereby facilitating demolding, improving production efficiency, and enhancing product quality. Built-in release agents are commonly used in the manufacturing processes of plastics, rubber, composite materials, and more.

Types

Built-in release agents mainly include the following types:

Silicone oil-based: Contains silicone oil components, offering excellent high-temperature resistance, non-volatility, and wear resistance. Suitable for producing high-temperature plastic products, electronic components, etc.

Wax-based: Contains wax components, providing good lubricity, non-adsorption, and stability. Suitable for producing rubber products, injection-molded parts, etc.

Lubricant oil-based: Contains lubricant oil components, offering good lubricity, non-volatility, and demolding performance. Suitable for producing high-viscosity resins, epoxy resins, etc.

Usage Methods

When using built-in release agents, the following points should be noted:

Select the appropriate type: Choose the suitable built-in release agent based on the material and manufacturing requirements of the product.

Mix evenly: Mix the built-in release agent with a solvent in the specified ratio until uniform, then spray it onto the mold surface and the product surface to achieve a complete and even thin-layer coating.

Pay attention to usage cycle and shelf life: Ensure the use of release agents within their shelf life to avoid expired usage.

Consider compatibility: Ensure the compatibility of the built-in release agent with other materials to avoid contamination and corrosion due to compatibility issues.

Prioritize safety: Avoid direct contact with sensitive areas such as skin and mouth, and keep away from fire sources and high-temperature environments.

Application Scenarios

Built-in release agents are widely used in plastic processing, including:

Injection molding: Reduces the adhesion of plastic products in the mold, improving production efficiency and product quality.

Extrusion molding: Reduces friction between plastic and the extrusion die head and mold, preventing plastic from adhering to the die head and mold.

Blow molding: Reduces the adhesion of plastic in the blow mold, making it easier to detach from the mold and improving production efficiency and product quality.