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[Chemical Knowledge]：Do you know what plastic bags are made of? Let's understand its composition and application

Read： 414 Time：17months ago Source：Transform the World with Simplicity

The huge concept of plastic bags is actually more than just our common supermarket shopping bags. It also includes household garbage bags, tote bags, bread bags, cosmetic bags, and the like.

So, what material are these plastic bags made of? In general, plastic bags are mainly made of polyethylene and polyvinyl chloride.

polyethylene, referred to as PE, is a thermoplastic resin, transparent or white in color, with excellent corrosion resistance, light weight, good insulation and so on. It is very common in the field of household garbage bags, supermarket shopping bags and so on.

and polyvinyl chloride referred to as PVC, it is more soft than polyethylene, commonly used in the production of handbags, cosmetic bags and other plastic bags that require a certain degree of flexibility. PVC material bags are also more expensive, so they are generally used for high-end commodity packaging, gift bags, etc.

in addition to these two materials, there are some plastic bags because of the special requirements of its use and need other materials for toughening and strengthening, such as food preservation bags will add PEVA, PA and other materials.

So these plastic bags in addition to daily use, what are the applications? In fact, its use is very extensive, such as:

1: food preservation bags, plastic wrap and so on.

2. Garbage disposal: domestic garbage bags, kitchen garbage bags, etc.

3. packaging gifts: supermarket shopping bags, gift bags, etc.

4. dress beauty: cosmetic bags, skin care bags and so on.

5. Transportation and warehousing: logistics bags, storage bags, etc.

plastic bags because of its light weight, low price and other characteristics, so that large supermarket chains and shopping malls can save logistics costs and storage space. However, the convenient existence of plastic bags will also have a certain negative impact on the environment, so management and recycling are very important.

plastic bags although seemingly simple, but in our daily life plays a very important role. Mastering its material and application has a positive impact on our life and environment.