PP

PP (polypropylene)  is the lightest resin among all plastics and has the lowest density.

① High transparency;

② Good printing performance;

③ Higher mechanical strength than PE, that is, not easy to stretch, especially the performance of biaxial stretching is relatively low;

④ Good moisture resistance, often used as the surface layer of biscuits;

⑤ Good acid, alkali and oil resistance, such as oil packaging and the inner heat sealing layer usually use CPP instead of PE;

⑥ General gas barrier performance;

⑦ Better high temperature resistance than PE, worse than PET and NY;