As a factory, Xiamen Guanhua has absolute advantages and looks forward to cooperating with you. Product Packaging PP Shrink Wrap is divided into unstretched film and bidirectional stretched film, the two films are very different in performance, so it should be considered as two different films.
Unstretched polypropylene films Unstretched polypropylene films include blown polypropylene film (IPP) produced by extrusion blow molding and extruded cast polypropylene film (CPP) produced by T-molding. The transparency and toughness of PP film are poor. And high transparency, and good toughness. CPP film has better transparency and gloss, and its appearance is close to cellophane. Compared with PE film, unstretched polypropylene film has better transparency, gloss, moisture resistance, heat resistance and oil resistance. High mechanical strength, tear resistance, puncture resistance and wear resistance; And non-toxic, odorless. Therefore, it is widely used in the packaging of food, medicine, textiles and other items. However, its drought resistance is poor, and it is brittle at 0 ~ 10 ° C, so it can not be used for frozen food packaging. Unstretched polypropylene film has high heat resistance temperature and good heat sealing performance, so it is commonly used as the heat sealing layer of cooking bag.
1.Transparency, gloss, comparable to cellophane;
2.The mechanical strength is increased, but the elongation is decreased;
3.The cold resistance is improved, and the brittleness is unchanged when used at -30 ~ -50℃;
4.The moisture permeability and air permeability are reduced by about half, and the organic vapor permeability is also reduced to varying degrees;
5.The single film can not be directly heat-sealed, but its heat-sealing property can be improved by coating adhesives and other plastic films.