Shopping bags in shopping malls, as the name implies, are used for shopping. At present, the shopping bags available in the market mainly include plastic shopping bags, non-woven shopping bags, paper shopping bags, cotton and hemp shopping bags, etc.
Starch-based plastic shopping bag - this kind of shopping bag takes modified starch as the main raw material and adds a small amount of other degradable materials to improve its performance. The plastic shopping bag can be naturally degraded when it is discarded in the field after use.
Degradable plastic shopping bags - these shopping bags are made of fully degradable plastic and have complete degradation performance. The product can be completely degraded into small molecule microorganisms in the field without any environmental pollution, and this kind of plastic shopping bag is promoted abroad. According to the specific composition of fully degradable plastics, they can be divided into the following three categories:
PLA and PHA biodegradable plastics, which are synthesized by biological fermentation with natural starch as raw material, need to consume a lot of food, so the development space is limited.
Aliphatic polycarbonate (APC) is a kind of degradable plastics, which is synthesized from carbon dioxide. It uses carbon dioxide, a byproduct of the industry, as the raw material. It not only does not consume food, but also reduces the carbon emissions, and eliminates the global warming caused by greenhouse gases. It achieves two goals with one stone. Therefore, it has a broad market prospect.
The fully degradable products added with nonstarch degradant in common plastics are in the stage of industrialization. If the degradability is reliable, it has a bright future.
After the strict restrictions of the state on plastic shopping bags, department store plastic shopping bags are no longer the thickness in the past, and the materials are different, which means that department store plastic shopping bags can be degraded.
Supermarket shopping bags are light and strong.
Supermarket shopping bags have excellent insulation performance.
Almost all supermarket shopping bags in China have excellent electrical insulation performance,
The chemical properties of supermarket shopping bags are also extremely stable.
The antifriction and wear resistance of supermarket shopping bags are also excellent. Many supermarket shopping bags have very good performance of antifriction, antifriction and self-lubricating. The friction-resistant parts in these shopping bags make use of this strong feature of plastic. Some solid lubricants and fillers are added into the antifriction plastic, so as to reduce the friction coefficient of this supermarket shopping bag and further improve its antifriction performance.