What are biodegradable plastic bags?

Biodegradable plastic bags are plastic bags made from biodegradable plastics

1, degradable plastics:

Degradable plastic refers to the production process to add a certain amount of additives (such as starch, modified starch or other cellulose, photosensitizer, biodegradative agent, etc.), so that the stability of the plastic, easier to degrade in the natural environment.

2.. Classification:

Biodegradable plastics generally fall into four broad categories:

i, photodegradable plastic: in the plastic mixed with photosensitizer, in the sun so that the plastic gradually decomposition. It belongs to an earlier generation of degradable plastics, and its disadvantage is that the degradation time is unpredictable due to sunlight and climate change, so the degradation time can not be controlled.

ii, biodegradable plastics: under the action of microorganisms, can be completely decomposed into low molecular compounds of plastic. Its characteristics are convenient storage and transportation, as long as keep dry, do not need to avoid light, a wide range of applications, not only can be used for agricultural mulching, packaging bags, and widely used in the field of medicine. With the development of modern biotechnology, biodegradable plastics have been paid more and more attention, and have become a new generation of hot research and development.

iii, light/biodegradable plastics: photodegradation and microbial combination of a class of plastic, it has the characteristics of both light and microbial degradation of plastic.

iiii, water degradation plastic: add water absorbent substances in plastic, after use in water can be dissolved, mainly used in medical and health appliances (such as medical gloves), easy to destroy and disinfection treatment.

3. Introduction:

Tests show that most degradable plastics begin to thin, lose weight, lose strength and gradually break into pieces after 3 months of exposure in general environment. If the debris is buried in garbage or soil, the degradation effect is not obvious.

Development Information:

What are the problems with "biodegradable plastics"

Aside from the material itself, China does not yet have a widespread industrial composting industry, nor does its garbage sorting and recycling system work well. Promoting the use of "biodegradable plastics" could lead to a new "white pollution". However, the publicity of "biodegradable plastic" can easily lead the public to think that it is a kind of material that "can disappear without treatment" and thus lead to misleading. Getting back to the bottom line, the plastic pollution currently facing China and the world is the price of overconsumption and irresponsible consumer behavior. Even if "biodegradable plastics" can be recycled into industrial compost to solve the degradation problem, the consumption of "biodegradable plastics" is ultimately the consumption of environmental resources. From this perspective, we need to consider how to reduce the source of excessive consumption. But we can't deny that in the future, biodegradable plastics may be a trend. Deng Xiaogang, director of hainan's ecology and environment department, said, "There is no national standard for fully biodegradable products, and there is no relevant standard in other provinces, so Hainan needs to innovate and make the first truly local standard for fully biodegradable products." It still makes sense. Next, we hope that this initiative in Hainan can force the development and improvement of biodegradable plastic technology, and remove the constraints in technology, standards, production and processing procedures for the promotion of biodegradable plastic in the future, so that it can become a real practical and perfect solution to "white pollution".