Polyethylene terephthalate oxalic ester (PET)
Pharmaceutical packaging used in the PET is a lot of more phyletic, the characteristic viscosity between 0.75-0.85 cm3 / g is mainly to do plastic bottles and sheet, due to its high strength, good transparency, excellent dimensional stability, good air tightness, commonly used as a substitute for glass and metal containers, the packing for tablet, capsule and other solid preparation;Characteristic viscosity between 0.57-0.64 cm3 / g PET after two-way stretch forming of polyester film (BOPET), commonly used in Chinese medicine yinpian packing;In addition, because of its smell and high heat resistance, can be used as a barrier layer of multilayer composite membrane to ensure the drug in the period of validity is not bad, not affected by light and cracking, such as PET/PE composite membrane, etc.
Polyvinyl chloride (PVC)
PVC good transparency, high strength, good heat sealing and printing, in pharmaceutical packaging, is used mainly for rigid PVC plastic box, bottle, etc.;Soft PVC is used mainly for film, bag, etc.In recent years, with the improvement of pharmaceutical packaging quality and grade, has opened up a new application for semi-rigid PVC sheet space, at present a lot of PVC sheet is used as a tablet, capsule of aluminum-plastic blister packaging blister material.