TPE overmolding process should pay attention to the problem
An important application area TPE thermoplastic elastomers - Rubber PS structure. TPE plastic bag overmolding process parameters need to pay attention to the following conditions:
Compatibility with matching required 1.TPE hard plastic structural member, close to the solubility of the molecule, the compatibility of the molecule was better;
2. In the design need to avoid sharp corners, to ensure good contact TPE with a hard plastic pieces to enhance the bonding effect;
3. the thickness of the expected touch TPE balance;
4. appropriate exhaust in order to avoid leaving the mold cavity gas;
5. Select the masterbatch carrier resin which are compatible with the TPE materials and structures;
6.TPE overmolding material required drying material reprocessed to reduce product surface waterlines to obtain uniform color effect of the surface;
7. Keep TPE melt temperature to ensure adhesion;
8. For a smooth surface to special treatment, in order to increase the contact surface soft and hard plastic bonding, adhesion reinforcing effect;
9.TPE should have good liquidity, due to the layer thickness and TPE package size ratio is small, TPE usually takes longer to flow through the path and thin-walled district to charge into the mold.
10.TPE the flow length / thickness ratio of less than 150 products: 1;
11. The use of a good binder (end).
TPE material with a plastic bag close to a soft and comfortable touch with human skin, which is applied to the package TPE rubber essence lies. By adjusting and optimizing the process of encapsulating process conditions parameters, I believe there will be more and more functionality TPE materials and decorating products to enhance our lives
