TPE overmolded hardware material process 　　The process of TPE overmolded hardware material adopts the second injection molding process. 　　The first injection is to inject TPE soft rubber to the overmold, and the second is to inject tPE soft rubber to the hard rubber. Cooling then get the products.

　　The appearance of the TPE rubber material of PC is natural or translucent plastic particles, specific gravity 1.02-1.24, the main hardness range Shore 40-90A, the rubber material can be molded by injection molding process, excellent fluidity, and PC plastic has good adhesion. And TPE rubber material has a comfortable and smooth touch, wear resistance and good white scratch resistance, anti-slip, dustproof. Fireproof material, fireproof V0, temperature resistance up to 80 ℃.

　　The processing method of TPE covered PC. 　　TPE overmolded PC, generally using the usual molding method, that is, two sets of molds, one set first injection molding PC products, the other set of molds (called overmolded molds) for injection molding TPE rubber overmolded to the surface of PC products. This kind of molding method is called secondary injection molding, overmolding or embedded injection molding. There are also more advanced two-color injection molding machines to process, the result is the same, through the injection molding method, the TPE and PC good composite bonding together. The injection molding temperature for overmolding varies depending on the hard plastic material used for overmolding.

　　The importance of overmolding, in order to make customer satisfaction, technology produced products, all in accordance with customer needs to produce, because the TPE overmolding layer thickness and size ratio is very small, TPE should have good flowability, TPE. 　

　　The key point of TPE overmolding (secondary injection molding) is to make the TPE and the covered substrate (hard plastic, so called) PP, ABS, PC, PA, etc. to be well covered and bonded. In order to make TPE and hard plastic bond well, according to the principle of chemical compatibility, the key is that TPE and hard plastic should have similar polarity, so that TPE and hard plastic can be fused at the molecular chain level. Therefore, the type of hard plastic determines the formulation of TPE, and the secondary injection molding process (such as the temperature of the secondary injection, etc.) directly affects the adhesion of TPE and hard plastic. The following detailed analysis:

　　Color difference is a common defect in TPE injection molding, and it is not uncommon to see batches of injection molded products scrapped due to the color difference of matching parts. Not considering the subjective factor of different people's visual perception of color differences, there are many objective factors affecting the color difference of TPE|TPR products, including TPE raw materials, color masterbatch (or color powder), mixing of color masterbatch with TPE raw materials, injection molding process, injection molding machine, mold, etc.. Because of the wide range of factors involved, the color difference control is one of the more difficult techniques to master in TPE color matching injection molding. In the actual production process, we generally control the color difference of TPE products from the following six aspects.

TPEE has the elasticity of rubber and the strength of engineering plastics, but also has good flexibility, high melt stability, low melt viscosity, can be used to improve other plastics high and low temperature impact strength (toughness), flexibility and blending system compatibility, but also can provide some flexibility. As TPEE contains ester bonds, polar polymers, thus TPEE can be used to modify polar POM, PBT, PET, etc., can also be blended with PVC, and PP, polyacetal and CO-olefin alternating copolymers, or blended with other elastomers, etc., used to improve the impact toughness of these products::

　　TPE 60 degree rubber is a special engineering plastic modified by blending SEBS rubber with other components, which has the elasticity and wear resistance of rubber and the thermoplasticity of plastic, and can be easily injected, extruded, blow molded and saliva molded. Material hardness range ShoreA0~100 degrees, of which 60 degrees (60A) is very common material use applications. Its application can be divided into three categories, TPE soft rubber material in the process of blending modification does not introduce toxic components, is environmentally friendly materials. No halogen, no NP, no PAHs, no phthalates (16P, 6P). Comply with ROHS, REACH, EN71, ASTMF963 environmental testing standards.