​ What's the difference between PE,PO and PP plastic bags?

What's the difference between PE,PO and PP plastic bags?

PE and PP are short for raw materials in English. The chemical name for PE is linear polyethylene, which is divided into two types. One is high-density linear polyethylene, commonly known as HDPE, and the other is low-density linear polyethylene, commonly known as LDPE. Actually this low density also divides into two kinds, LDPE and LLDPE (we will call them respectively the main material and the secondary material, but does the plastic bag time two kinds to be used together). And the chemical name of PP is polypropyleneene, no more detailed distinction. When signing the contract, there are three kinds of raw materials, namely LDPE/LLDPE/PP. The finished product is PE plastic bag (PO plastic bag has no export name) and PP plastic bag.

The raw materials for bubble bags, pearl cotton and bone bags are all PE materials, namely the synthetic materials of LDPE and LLDPE. Like the general factory use of plastic bags is PE plastic bags, such as electrical factory, hardware factory, plastic factory, clothing factory, shoe factory, and so on. PE plastic bags are widely used. The thin film farmers use for spring plowing is also made of PE. PE bags are transparent, smooth to the touch, soft and soft (LLDPE at work). Most and PP plastic bags used for gift packaging, and finished garments for sale, we have to buy new clothes bag packaging and with a layer of double-sided adhesive sealing product that is usually the PP plastic bags, PP plastic bags are very transparent, feels too slippery, but very hard body, noise is very big and very crisp fold it up and there will be a crease, PE bag, no. Because transparency is good, gift-wrapping can look expensive. PP is similar to OPP, but transparency is not as good as OPP. Therefore, PP plastic bag has more advantages than OPP plastic bag price. PE materials used to be more expensive than PP materials. In the past two years, due to the rising oil price, the cost of plastic bags has also increased a lot. But do not know what reason, PP material than PE material more tight, the price also exceeds the price of PE material. As for PO plastic bag, it has its particularity. It can be very thin. According to our current technology, 0.7 silk can be used. PE and PP can only achieve the thinnest 2 silk. PP isn't even good enough. In this way, the price advantage of PO becomes more obvious. But because the PO plastic bag is almost white, the use is much smaller.