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Powder coating at a certain temperature blocking is a natural law, which is mainly composed of powder coating resin, leveling agent and other materials softened by heat.
to prevent powder coating lumps must be in the powder coating production of grinding, packaging, storage, transportation and other processes, powder coating products in its glass temperature below.
is now in the summer production stage, the temperature rise will be easier to powder coating products blocking problems, then in the production of how to prevent powder coating lumps?
1) When producing polyester resins, select alcohols or acids that can increase their glassing temperature, or reduce the amount of alcohol used to reduce the glassing temperature of the resin to increase the glassing temperature of polyester resins .
2) Reduce the use of low-glass temperature polymers, such as leveling agents and brighteners, in powder coating formulation design to ensure that the glassing temperature of the powder coating system is not reduced.
3) production, the broken sheet material down the steel belt should be fully cooled before entering the grinding process, grinding powder should be appropriate to reduce the feed speed, increase the air intake, imported air-conditioning air conditioning to control the grinding temperature.
4) Anti-block additives, such as nano-silicon dioxide (VK-SP15) or nano-aluminum trioxide (VK-L20M) micro-powder can be added to prevent adhesion between powder particles, anti-blocking agents generally and broken tablets at the same time grinding powder effect is best.
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