Plastic bags are common plastic packaging products, which are widely used in plastic packaging products. Today we will take a look at its classification. There are three common classifications: general-purpose plastic bags, PE plastic bags, and degradable plastic bags.

First, general-purpose plastic bags have the function of both shopping bags and garbage bags. The common ones are hand-held plastic bags and garbage plastic bags. Portable plastic bags are actually a type of PE plastic bags. Portable plastic bags are generally disposable shopping bags that are common in the market. Plastic bag manufacturers usually print plastic bags with smiling faces for use in the wholesale market. Such plastic bags usually do not have a fixed design. , Plastic bags are commonly used in the takeaway packaging market. Common places of use are: bags for vegetable markets, bags for fruit shops, bags for households, bags for bookstores and bags for clothing.

Biodegradable plastic bags are a new type of environmentally friendly plastic bags, and they are also produced according to the specifications and standards required by the current state. Biodegradable plastic bags that meet the implementation standards of GB/T 38082-2019. The main types are: PLA: Polylactic acid, a polymer obtained by polymerization of lactic acid as the main raw material, is a new type of bio-based and renewable biodegradable plastic bag material. It has good solvent resistance, biocompatibility, gloss, transparency, and also has certain bacteria resistance, flame retardancy and UV resistance. PBAT: a copolymer of butylene adipate and butylene terephthalate, which belongs to thermoplastic biodegradable plastics. It not only has good ductility and elongation at break, but also has good impact resistance; in addition, it also has excellent biodegradability, and is one of the very active degradable plastic materials in the research of biodegradable plastic bag materials.

Second, the common degradable plastic bags are: fully biodegradable plastic bags, photodegradable plastic bags, oxidation/biodegradable plastic bags, thermoplastic starch resin degradable plastic bags.

Fully biodegradable plastic bags are the most common and can be directly degraded in nature. Corn is used as raw material, and polylactic acid made by fermentation is the main material. After degradation, it is completely biodegradable material that becomes carbon dioxide and water. It is a real degradable plastic. Plastic bags can be said to be a substitute product for plastic bags, which can fundamentally solve the problem of plastic bag pollution, rather than treating the symptoms but not the root cause.

Three, environmentally friendly plastic bags include: PLA plastic bags, PHAs plastic bags, PBA plastic bags, PBS plastic bags, etc.

Environmentally friendly plastic bags are short for various biodegradable plastic bags. With the development of science and technology, various materials that can replace traditional PE plastics have emerged, including PLA, PHAs, PBA, PBS and other polymer materials. Can replace traditional PE plastic bags. Environmentally friendly plastic bags are widely used at present: supermarket shopping bags, continuous roll fresh-keeping bags, plastic film, etc. have large-scale application examples in China.

The birth of all kinds of environmentally friendly degradable plastic bags has opened a door for China's environmental protection construction.