Development of High Transparent Polypropylene

摘要

Due to the low transparency and poor gloss, the applications of ordinary opaque polypropylene are limited largely in the field of food, medicine, medical instrument and packaging. One of the ways to solve the defects mentioned above is to develop transparent polypropylene which is industrialized via polymerization and processing. The article introduces the progress of high transparent polypropylene (HTPP) all over the world. High transparent polypropylene (HTPP) has excellent transparency and glosses, which is compared favorably with polyvinyl chloride (PVC), polyethylene terephthalate (PET) and polystyrene (PS). Being compared with traditionary PP, the molding speed of HTPP is increased by 26%, the molding temperature is lowered by 22%, and molding energy is saved about 25% [1-8]. So, the market of HTPP keeps rapidly growth in these recently years. In Germany, PVC has been replaced by HTPP; LG Chem. (Korea) has used HTPP as the substitute of PET; in America, the consumption of HTPP is higher by about 10% than that of traditionary PP; in Japan, the capacity of nucleating transparent agent (NTA) added into HTPP has reached 3000 tons. According to incomplete statistics, the demand of HTPP in aboard market is nearby 1000 million tons in 2012. The industrialization of HTPP has become a new growth point on the industry of PP.