Usually it is soft (usually TPE SEBS system / TPR) bonded to rigid plastics (eg, PC, PC + ABS, etc.) through the second injection surface (or double injection) approach. The phone sets with rigid and flexible dual character. Such mobile phone sets are common frame-phone sets and the overall structure of the two cellular phone sets. With excellent resilience, deformation resistance, low temperature, non-toxic, odorless, environmentally friendly material, has good color properties.