TPE/TPR is often compounded with plastic, the principle is that TPE/TPR and plastic have close polarity or through polarity adjustment, thus facilitating the bonding of TPE/TPR and plastic wrapping. But hardware and TPE/TPR is different, one is plastic, one is hardware. It is not a category in terms of material polarity, and it is not a class in terms of melting point. Therefore, TPE/TPR and hardware wrapping, there is no chemical level of bonding, wrapping is very difficult.

　　The difference between the real package and the fake package is that the combination of hard and soft glue is different, the mechanism of the real package is chemically compatible compound, the hard glue and soft glue are dissolved under high temperature and combined together. The mechanism of the fake package is physical mechanical compound, is to force the role of the TPE and metal inlay together, said embedded injection molding.

　　TPE overmolded hardware

　　

　　1.Overall overmolding

　　The overall package, equivalent to injection molding a TPE / TPR plastic parts, the hardware products wrapped in it, there is no chemical sense of bonding, package more or feasible. The general use of higher hardness TPE/TPR, hardness 80A or more, can be wrapped, but the wrapped hardware should be the whole package, if only part of the package, it is difficult to achieve.

　　2.Partial encapsulation

　　Partial wrapping, soft hardness, strength is not enough, difficult to adhere, through the hardware to do hole processing, can strengthen the physical and mechanical combination of TPE and hardware, so as to improve the solidity of the wrapping. This kind of cladding, plastic Bo see many cases of vulcanized rubber parts cladding hardware, but the rubber is vulcanized. Such as the use of injection molding process, TPE/TPR and hardware partially overmolded, it is very difficult. If the hardware is perforated, the TPE/TPR rubber will be injected into the hardware products, or can enhance the solidity of the package. Another customer tries to pre-coat the hardware with glue, and then inject the glue, but the effect is not good.

　　TPE wrapped metal

　　Conclusion: The higher the hardness of TPE, the better it is for the metal covering.