Reasons and solutions for blemishes on rubber release agents

Rubber release agent is an interface coating used on two surfaces that are easily adhered to each other, which can make the surface of the object easy to detach, smooth, and clean. But in the production process, if there is improper operation, it is very easy to have scars during the molding of the product. Next, the editor of Jianyi Chemical will analyze the reasons and solutions for this situation?

1. Evaporation caused: During evaporation, solid precipitation cannot form a uniform film, and dispersants and solvents need to be adjusted.

2. Spray flow caused: adjust the spray amount of release agent.

3. Uneven spraying causes: improve coating.

4. Caused by lipid flow: prone to turning points, overcome during mold design.

5. Wiping causes: Choose the hardness of the release agent and solvent system.

6. Product shrinkage caused by: shrinkage stress exceeding tensile strength, concentric scars, mainly adjusted by material shrinkage rate, injection pressure, etc.

7. Bubble induced: There are many small bubble pits on the surface of the product, problems with the raw materials or the defoaming performance of the mold release agent. There are gaps between it and the mold where air is sucked in or the mold surface is rough, which increases the hardness of the mold release agent.

The above is the reason and solution for the spot on the surface of the rubber release agent shared by Xiao Bian. The rubber release agent is widely used in various molding operations such as glass fiber reinforced plastics, metal die-casting, polyurethane foam and elastomer, injection molding thermoplastics, vacuum foam sheets and extruded profiles.