1, in terms of materials, the chemical symbol of high-voltage package is LDPE, also called low-density polyethylene; Low pressure bag chemical symbol HDPE, also known as high density polyethylene.

2. Many characteristics of high-pressure plastic bags are superior to those of low-pressure plastic bags, but because of their softness, the thickness of high-pressure plastic bags is much larger than that of low-pressure plastic bags, so the materials needed are redundant. So the price of high-pressure plastic bags will be higher.

3. When the plastic bag is stretched by hand, the low-pressure material has white spots, while the high-pressure material has no white spots.

4. In terms of appearance, the high-pressure bag looks shiny, soft and smooth, and the sound is soft and small when rubbed; Large elongation and good toughness. High-pressure bags have high transparency, and many high-grade raw materials for portable plastic bags and industrial packaging, such as packing boxes, dust covers for instruments and meters, and plastic wrap sold in supermarkets, are made of high-pressure materials.

The low-pressure bag looks dull and rough to the touch, and it is louder and has good tension than the high-pressure bag when rubbing. Hardness is much higher than that of high-pressure plastic bags. Widely used in supermarket shopping bags and vegetable shopping bags.