There are many kinds of PC alloy, improve the PC melt viscosity (processability) and products easy to stress cracking and other defects, PC and different polymers to form alloys or blends, improve material properties. Specific PC/ABS alloy, PC/ASA alloy, PC/PBT alloy, PC/PET alloy, PC/PET/ elastomer blend, PC/MBS blend, PC/PTFE alloy, PC/PA alloy, there are two kinds of material performance advantages, and reduce the cost, such as PC/ABS alloy, PC mainly contributes to high heat resistance, good toughness and impact strength, high strength, flame retardant, ABS can improve formability, apparent mass, reduce density.