The po plastic bag is milky white and slightly transparent. Therefore, the PP plastic bag is more advantageous than the OPP plastic bag. It used to be that PP was more expensive than PE. Industrial plastic bags use more PO, PE, PP, and OPP. Comparison of these 4 materials , PE is the cheapest seller, OPP is the most expensive, PO ranks 2, PP ranks 3. PE and PP are the English abbreviations for materials. The chemical name of PE is linear polyethylene, which is divided into two types. One is high-density linear polyethylene, which we generally call PO---HDPE, and the other is low-density Linear polyethylene is what we generally call PE---LDPE. In fact, this low-density linear polyethylene is also divided into two types, LDPE and LLDPE (we will call them the main material and the auxiliary material, but they are used as plastic bags. The two kinds of time and time should be used together. If only the main material is required, the plastic bag is strong; if only the auxiliary material is required, the plastic bag has no tension and is simply split). The chemical name of PP is polypropylene, and there is no more specific distinction. Yes, there are three original materials when signing the contract: LDPE, LLDPE, PPHDPE. The products are PE plastic bags, PO plastic bags and PP plastic bags.The original materials of bubble bags and bone bags are all PE materials, which are the components of LDPE and LLDPE. Plastic bags used in general factories are also PE plastic bags, such as electronics factories, electrical appliances factories, hardware factories, plastic factories, and clothing factories. , Shoe factories, etc. PE plastic bags are widely used. The film used by farmers in spring plowing is also PE material. PE plastic bags look bright, feel very lubricious, have little soft sound and have good durability (this is LLDPE PP plastic bags are mostly used for gift packaging, as well as product clothing sales. The new clothes we buy are packaged in plastic bags and have a double-sided adhesive seal. Generally, OPP plastic bags. PP The plastic bag is very transparent and very slippery to the touch, but it is very hard, loud and brittle. If you fold it in half, there will be creases. If you fold the PE plastic bag, you will not have it. Because of its transparency, look at it when packing gifts The level is very high. PP plastic bags are very similar to OPP plastic bags, but the transparency is not as good as OPP. OPP is also called glass film.
