Plastic mulching technology is also a double-edged sword. With the popularization and application of mulching technology, it has also brought serious pollution problems of mulching film. Most of agricultural plastic mulching films are polyethylene light polymer compounds, which are difficult to degrade under natural environmental conditions. According to statistics, 200,000 to 300,000 tons of non-degradable residual mulch will be added to my country's farmland every year, which will harden the land, reduce crop production, and damage the ecological environment.

Aiming at the "white pollution" problem caused by the wide application of ordinary plastics, biodegradable plastics have emerged as the times require and become an ideal measure to solve the worldwide problem of "white pollution".

Mulch film is also an important application direction of biodegradable plastics. Compared with traditional PE mulch film, the main advantage of biodegradable mulch film is that after the mulch film loses its functions of increasing temperature and keeping moisture, it will be degraded into water and carbon dioxide after a certain period of time under the action of various factors. Molecular substances, so as to prevent the pollution of farmland soil by residual film.

The raw materials of plastic film are mainly divided into two categories: one is natural biomass as raw material; the other is petroleum-based raw material.

Natural bio-based raw materials are mainly starch and cellulose. The biological mulch film made of natural biomass can realize completely biodegradable mulch film. The fully biodegradable mulch film uses starch, cellulose, etc. The fully biodegradable mulch film uses PE as the matrix and adds filler materials such as starch and cellulose to achieve the purpose of partial degradation.

The production of degradable plastic film based on petroleum base mainly includes polyhydroxybutyrate (PHB), polycaprolactone (PCL), polyhydroxyalkanoate (PHA), dibasic acid diol copolyester (PBS, PBAT, etc.), CO2 copolymer-polypropylene carbonate (PPC), etc.

Henan Techuang Biotechnology Co., Ltd. is a modern green and environmental protection enterprise integrating R&D, production, sales and technical services, providing services for biodegradable plastic bags and products. For more information, please visit the official website of Baydeebio: www.baydeebio.com