Popular keywords:microcellular bags , sealed bags, plastic bags, CPP printing bags, OPP, breathable bags
2022-11-7 17:48:16Plastic degradation refers to the end of the life cycle of polymer polymers, with a decrease in molecular weight, manifested as brittleness, cracking, softening, hardening, and loss of mechanical strength. The degradation of ordinary plastic bags takes decades or even hundreds of years. Non degradable plastic bags can pollute the environment when buried or incinerated. In order to protect the environment, the invention of degradable plastic bags has emerged.
Degradable plastic bags refer to plastic bags that are easily degraded in the natural environment by adding a certain amount of additives (such as starch, modified starch or other cellulose, photosensitizers, biodegradable agents, etc.) during the production process, which reduces their stability.
What are the types of biodegradable plastic bags
1. Photodegradation of plastic bags
Adding photosensitizers to plastic gradually decomposes under sunlight. It belongs to the earlier generation of degradable plastics, but its disadvantage is that the degradation time is difficult to predict due to sunlight and climate change, and therefore cannot be controlled.
2. Biodegradation of biodegradable plastic bags
Plastic that can be completely decomposed into low molecular weight compounds under the action of microorganisms. Its characteristics are convenient storage and transportation, as long as it is kept dry, there is no need to avoid light, and its application range is wide. It can not only be used for agricultural films and packaging bags, but also widely used in the pharmaceutical field. With the development of modern biotechnology, biodegradable plastics are receiving increasing attention and have become a new generation of research and development hotspots.
3. Light/Biodegradable Plastic Bag Making
A type of plastic that combines photodegradation and microbial degradation, and has the characteristics of both photodegradation and microbial degradation of plastics.
4. Water degradable plastic bag
Adding absorbent substances to plastic, which can dissolve when discarded in water after use, is mainly used for medical and sanitary equipment (such as medical gloves), making it easy to destroy and disinfect.
How to identify biodegradable plastic bags
1. Sign for biodegradable waste
The degradable plastic bag has a unified Chinese environmental label, consisting of a green label consisting of clear mountains, green water, sun, and ten rings. If it is a plastic bag used for food, it must also be printed with a food safety permit QS symbol and labeled as "for food use".
2. Storage time
The shelf life of biodegradable plastic bags is only about three, and even if not used, natural degradation will occur after five months. In the sixth month, the plastic bags will be covered in snowflakes and unusable. Under composting conditions, even newly produced biodegradable plastic bags can be completely degraded in just three months.
Article source network
Copyright belongs to the original author
If there are any copyright issues, please contact us promptly for resolution. Thank you!
Add: Xiamen Jimei North Industrial Zone, Tianfeng Road 215
Tel: 0592-5236671
Fax: 0592-3965599
E-mail: ch@xmxch.com.cn xmch_001@163.com
Location:
