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LSR Silicone Overmolding Thermal Plastic Guide
28 Nov 2017
Guide on LSR silicone overmolding thermal plastic substrates by injection molding
In recent years , the silicone made product is combination of softness and hardness by LSR silicone overmolding substrates technology . the technology had extended to thermalplastics material . the LSR, in some extend ,had better heat tolerance capacity , flexibility and chemical resistant ,self lubricant etc.
The long term stable bonding had become the most difficult and critical part of this technology . and we are trying to apply a primer coating outside the thermal plastic substrates .
But the cleaness of the substrates plays an important part on the bonding , so keeping the substrates clean and dry is quite important .
Keep up a high molding temperature on substrates is also important , LSR Silicone ovemolding thermal plastic is a process of chemical reaction . it is the result of time , curing temperature and pressure. In usual , the higher the temperature , the better the result. The higher the temperature means shorter curing time and production speed .
The adding of inner release agent or “Self rubricant “ on the thermalplastic substrates is forbidden as it affects the adhesion of LSR to thermalplastics . outter release agent is forbidden as well . Avoiding the use of substance containing sulfurous or amines which inhibit the curing of LSR Silicone, That's part of the guide on LSR Silicone overmolding thermal plastics . all in all , practice makes perfect.
