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Generally, PC and ABS can be used in the processing of small mechanical plastic shell. PC and ABS have certain compatibility. However, the compatibility of PC and ABS is greatly influenced by the model, ratio and processing technology of the two components.

In order to improve the interfacial compatibility, compatibilizer is added into the blending system. Common compatibilizers include: maleic anhydride MAH graft POE, ABS graft, PE graft, polystyrene maleic anhydride graft copolymer, acrylic acid or methacrylate copolymer, amine group, SAN, two-component compatibilizer, etc.

The PC/ABS alloy used in the processing of small mechanical plastic shell can combine the excellent properties of the two. On the one hand, it can improve the heat resistance and tensile strength of ABS; on the other hand, it can reduce the melt viscosity of PC, improve the processing performance, and reduce the sensitivity of internal stress and impact strength to the thickness of products.

Also, small mechanical plastic shells can be made of modified PBT materials, such as PBT plus 30% glass fiber, AND ABS or PC/ABS alloy. The material is suitable for making connectors, switch parts, household appliances, spare parts, small electric caps, automobile spare parts and mechanical equipment.

However, although ABS is widely used, it does not have advantages in toughness and strength. Of course, there are still price advantages. Small machinery plastic shell processing generally want to compare prices. If the three cost comparison, ABS low, modified PBT and PC/ABS alloy should be similar, maybe PBT slightly higher.