To share with you the TPE overmolding precautions.

　　1. The compatibility of TPE and hard rubber components need to be matched, the molecular solubility is close to the molecular compatibility is better;

　　2. Avoid sharp corners as much as possible in the design to ensure excellent contact between TPE and hard rubber parts to enhance the bonding effect;

　　3. Avoid leaving gas in the mold cavity through proper exhaust;

　　4. The flow length of TPE/thickness of the product is less than 150:1;

　　5. Balance the thickness of the TPE with the desired tactility;

　　6. Maintain the temperature of the TPE melt to ensure the bonding effect.

　　7. For the smooth surface should be special treatment, the purpose is to increase the soft glue and hard glue bonding contact surface, strengthen the bonding effect;

　　8. TPE should have good fluidity, because the thickness of the TPE adhesive layer and the size of the ratio is very small, TPE usually need to flow through a longer path and thin-walled area to fill the mold;

　　9. Use a good adhesive.

　


Translated with DeepL