Plastic bags are divided into two categories. One is to decompose shopping bags. It is an environmentally friendly shopping bag and does not cause any pollution and harm to the environment. Shopping bags. Because non -degradable plastic bags will cause a lot of harm to the environment, people now prefer to use degradable shopping bags. With the increasing importance to environmental protection, the plastic bags that are used at will have caused serious problems and burdens on the environment. The demand for degradation of plastic bags in the future will continue to increase.
Degradable plastic, also known as environmental degradation plastic, refers to plastic that adds a certain amount of additives in the production process to reduce its stability, and it is easier to degrade in the natural environment. With the development of science and technology, various types of materials that can replace traditional PE plastic appear, including PLA, PHAS, PBA, PBS and other polymer materials. Both can replace traditional PE plastic bags. Degradable environmentally friendly plastic bags are currently widely used: the main application areas include agricultural land, various plastic packaging bags, garbage bags, shopping mall shopping bags, and disposable catering utensils.
Biodegradable plastic refers to plastics that cause degradation by the role of microorganisms such as bacteria, mold (fungi) and algae that exist in nature. The ideal biodegradable plastic is a component of high molecular materials that can be completely decomposed by environmental microorganisms after abandoning, can be completely decomposed by environmental microorganisms, and eventually become inorganic. “Paper” is a typical biodegradable material, and “synthetic plastic” is a typical polymer material. Therefore, biodegradable plastic is a polymer material with the nature of “paper” and “synthetic plastic”. Biodegradable plastic can be divided into two types: complete biodegradable plastic and destructive biodegradable plastic
Destructive biodegradable plastic: Destroy biodegradable plastic currently mainly includes starch modification (or filling) polyethylene PE, polypropylene PP, polyvinyl chloride PVC, polystyrene PS, etc.
Complete biodegradable plastic: Complete biodegradable plastic is mainly made by natural polymers (such as starch, cellulose, chitin) or agricultural and sideline products. Polyester, polystrackic acid, starch/polyvinyl alcohol.
Restruction of the raw materials of shopping bags
The decomposable plastic bag is also called biodegradable shopping bags. It uses plant starch and corn flour, etc. It is made of materials extracted from plants. These raw materials will not cause any harm to the human body and the environment.
It can be treated in a landfield with degradable shopping bags. It only takes a period of time to be degraded into biological particles and then absorbed by the soil. The decomposable plastic bag not only does not have any impact on the environment, but can also become the fertilizer of plants and crops, promoting plant growth.
Therefore, the use of degradable shopping bags is now popular, and the use of non -degradable shopping bags is also slowly decreasing. None -degradable shopping bags will cause great harm to human health and ecological environment.
The harm of non -degradable shopping bags
Relative to the degradable shopping bags are non -degradable shopping bags. In fact, ordinary shopping bags can also be degraded, but it has been degraded for a long time for two hundred years. Moreover, the use of plastic bags in human society is so large. If you use irreplaceable plastic bags, it will make the ecological environment of the earth worse.
People do not have a good way to recycle shopping bag garbage, either incineration or landfill. No degradable shopping bags will affect the environment regardless of which method. For example, incineration will emit a bad smell and produce a large amount of black ashes; if it is treated by landfill, the earth will take hundreds of years to decompose the plastic bag.
Post time: Oct-08-2022