Material classification of plastic bags
There are two types of plastic bags we use:
1. High-density polyethylene, which is a shopping bag for supermarkets, is very cool and very hard to touch. When the color is not added, the bag is very embarrassing.
2. Low-density polyethylene, which is mostly used for packaging foods. It is soft to the touch and transparent when it is transparent.
There is also a PP or OPP, which is made of bread and biscuits. The material is very smooth and very transparent, but the sealing is not very good and there is no tension.
Then there are some composite materials, such as the packaging is very beautiful (such as milk powder) is generally OPP and nylon composite.
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