How to distinguish PO plastic bag new material or old material

POF is a kind of heat shrinkable film, which is mainly used for packaging products with regular and irregular shapes. It is non-toxic and environmentally friendly, high transparency, high shrinkage, good heat sealing performance, high gloss, toughness, tear resistance, It has the characteristics of uniform heat shrinkage and suitable for automatic high-speed packaging. It is a replacement product of traditional PVC heat shrinkable film. It is widely used in automotive supplies, plastic products, stationery, books, electronics, circuit boards, MP3, VCD, handicrafts, photo frames and other wood products , Toys, pesticides, daily necessities, food, cosmetics, canned beverages, dairy products, medicine, cassettes and video tapes, etc. POF five-layer co-extruded heat shrinkable film is a new generation that has gradually emerged in recent years and has been accepted by people. product. The environmentally friendly multi-layer co-extruded polyolefin POF heat shrinkable film uses linear low-density polyethylene (LLDPE) as the middle layer and co-polypropylene (PP) as the inner and outer layers in special equipment. The inner, middle, and The outer three layers are co-extruded to produce a heat shrinkable film with high transparency, high shrinkage and good heat sealing performance. It has all the advantages and advantages of polyethylene (PE) and polypropylene (PP) at the same time, and its excellent performance is far superior to simple polyethylene (PE) film and polypropylene (PP) film. Environmentally friendly heat-shrinkable packaging materials that have been widely promoted and used in the European and American markets. Distinguish between the new material of the PO plastic bag or the old material. It will feel grainy to the touch, and the dry and rough ones must be produced from recycled materials. Secondly, those with impurities and opaque light passing through it must be produced from recycled materials. Three smells, it smells pungent, not normal plastic. It is also made of recycled materials. Usually when we buy food, we give out plastic bags that are not the same as when we buy things in supermarkets and department stores. The plastic bags in supermarkets and department stores are environmentally friendly and non-toxic new plastic bags. This kind of bag industry is called vest bags. bag. The raw material of the shopping bag is made of PO material. The PO material bag has many advantages. It has good tensile force, high strength, and is not easy to deform. Unlike PE bags, they deform when pulled, but PO does not. This makes PO glue The bag has good load-bearing capacity and durability. Another advantage is that it is environmentally friendly. PO material itself is non-toxic and harmless, and resistant to acids and alkalis. It is also commonly used in electrical appliances, fertilizers and other industries as inner packaging.