In January 2020, the National Development and Reform Commission and the Ministry of Ecology and Environment jointly issued the "Opinions on Further Strengthening the Control of Plastic Pollution", requiring that by the end of 2020, take the lead in prohibiting and restricting the production, sales and use of some plastic products in some regions and fields," The era of "plastic ban" has officially arrived, and the opinions also proposed to promote the use of environmentally friendly cloth bags, paper bags and other non-plastic products and degradable shopping bags.
At present, in the replacement of plastic shopping bags, merchants mainly choose non-woven bags and degradable shopping bags.
PLA and PBAT are the current mainstream degradable plastic materials. Most of the degradable shopping bags on the market are made of PLA and PBAT. The mechanical properties are not good. The single production cost is more than 10 times that of ordinary disposable plastic bags. 0.5-1.2 yuan. Due to the early development of polypropylene non-woven bags, mature production technology, and complete domestic industrial chain, the production cost is comparable to that of degradable shopping bags, and the production cost of some non-woven bags with fillers is even lower than that of degradable shopping bags.
The currently popularized degradable shopping bags have poor use effect due to their relatively poor mechanical properties. Due to its good mechanical properties, polypropylene non-woven bags obviously have good strength and bearing capacity, and have a wide range of applications.
3. Environmental protection and recycling
Subject to cost constraints and environmental protection requirements, the currently used degradable shopping bags are mostly thin, soft, and have poor mechanical properties. They cannot be reused more than once, which is not easy to reuse. They also face many problems in the recycling process. Degradable plastics degrade. The conditions are also harsh. It needs to be degraded into carbon dioxide, water and minerals after half a year and no more than 12 months under aerobic composting conditions. Relatively speaking, non-woven bags can be reused more than 10 times under normal conditions, which is easy to recycle and reuse. By adding degradable materials and inorganic substances such as calcium carbonate and talc, the environmental protection and environmental protection of non-woven bags can be improved. economical.
From the aspects of cost, performance, environmental protection and recycling, it is not a simple matter to rely on the current degradable plastics to solve the problem of white pollution. PBAT and PLA face problems of high cost and inability to degrade in the natural environment (recycling is required to degrade under specific conditions). At present, traditional plastics are irreplaceable, and degradable plastics are difficult to solve. It is more important to reuse, recycle and sort traditional plastics scientifically and reasonably, and develop new degradation technologies. The domestic polypropylene non-woven bag production technology is mature and the production capacity is sufficient. Under the "plastic ban", it is undoubtedly a very good choice for non-woven bags to replace traditional ordinary plastic bags.