Reasons and solutions for surface blemishes on release agent products

Uneven spraying causes:Improve coating; Spray flow caused: adjust the spray amount;

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

Evaporation causes:Different solubility of solids or solvent solubility, orange peel phenomenon, and inability to form a uniform film when solids precipitate during evaporation. Adjust dispersants and solvents;

Resin flow causes:Easy to encounter turning points, overcome during mold design;

Bubbles cause:There are many small bubble pits on the surface of the product, problems with the raw materials or the defoaming performance of the release agent, gaps between the release agent and the mold where air is sucked in, or rough mold surfaces, etc., which can improve the hardness of the release agent;

Product shrinkage causes:If the shrinkage stress exceeds the tensile strength and there are concentric scars, adjustments such as material shrinkage rate and injection pressure are mainly selected;

The thermal capacity of mold materials causes:The heat capacity distribution of mold reinforcement materials is different, and the heat stored in metal processing oil is also different, resulting in faster reactions at high temperatures; Or caused by the melting of mold release agents at high temperatures, mold materials.

Although the water-based release agent industry has always focused on environmental protection, since the 1990s, there has been a high global emphasis on reducing harmful vapors to the human body in work environments and eliminating the use of hydrochlorofluorocarbons that have a destructive effect on the ozone layer in the atmosphere. By the end of 1989, release agent manufacturers and suppliers had generally banned the use of chlorofluorocarbons from sprays and solvent carriers. Instead, other solvents that are acceptable to the public according to the 1987 Montreal Convention guidelines will be used. In addition, in the current efforts to stop using external release agents, resin suppliers and molding workers are increasingly aware of and accepting the idea that internal release agents can be directly added to the resin to achieve the purpose of demolding.