Most styrene series TPE have a high molded shrinkage that causes the laminated composite to contract more than the substrate (typically PP,ABS,PC,PA, etc.), resulting in bending or warping of the substrate parts. This is especially true for long, thin parts, or parts with a substrate thickness thinner than the coating, or for substrate materials with a lower modulus of elasticity.
This situation can be handled in the following ways:
Selection of TPE materials:
Adopt matrix materials with higher elastic modulus.
Add reinforcing rib […]