One of the "magic cubes" that eradicates white pollution with starch

Qingdao Kangwen Bioplastics Co., Ltd. uses biodegradable plastic additive technology to develop a series of new environmentally-friendly plastic products that can be completely degraded and degraded in a short time and can be manually controlled, to provide a possibility of eradicating the irritating white pollution. White pollution "magic square"

This is a new technology called "decomposition of plastics". It can make plastic products such as plastic shopping bags that are not easy to recycle and recycle. After they have completed their normal service life, they will retain 3 to 12 in the natural environment. After the completion of the month, it will be completely degraded, thus avoiding the problem that many plastic bags can only be degraded after waiting a few years, more than ten years or even several decades after use, and can achieve the “white pollution” cure.

This technology is biodegradable plastic additive technology. Qingdao Kangwen Bio-Plastics Co., Ltd., located in Qingdao Economic and Technological Development Zone, makes use of its new technology to fill gaps in domestic production of plastic shopping bags, food packaging bags, garbage bags, agricultural film and disposable tableware (such as fast food boxes, cups, chopsticks) (Knife, fork, etc.) can be completely biodegraded into carbon dioxide and water in up to one year in the natural environment.

At Kangwen Bioplastics' product showroom, the reporter saw many bottles filled with fine white particles. Zeng Xujun, general manager of the company, told reporters that this is a biodegradable plastic additive for different plastic products. It mainly solves the problems that cannot be solved by starch-based degradable plastics. First, it can completely transform bio-degradable plastic products into carbon dioxide and water. Residues; Second, to maintain or enhance the physical properties of plastic products - strength, tensile strength, elasticity, toughness and transparency, etc.; Third, recycling can be recycled, is the replacement of starch-based plastic bags.

Zeng Xujun said that most of us now use starch-based plastic bags. According to the principle that microorganisms can consume starch, starch is added during the manufacture of polyethylene film. Through the consumption of starch by microorganisms, many small holes can be formed on the plastic film. Two to three months can be dispersed from large pieces into pieces. However, this is not an essential change. It is only due to the large and small changes in the morphology that can not fundamentally eliminate the increasingly serious “white pollution”. The polymer matrix will remain in the soil and other environments for a long time and cause serious pollution. The Kangwen biodegradable plastic additive contains two substances that promote the complete degradation of plastic products in a short time. One is a composite of natural plant cellulose as the main component, which is produced by the absorption of microorganisms. The composition is in the form of fine particles, has both biodegradable properties and high transparency, and has an impact on the physical properties of the end product. micro. The other is a pre-degraded composition made up of non-toxic, non-heavy metal ions that allow the product to undergo a high level of controlled degradation after a period of light exposure.

According to Zeng Xujun, under the joint action of the above two degradation catalysts, plastic products containing Kangwen's biodegradable additives have been thrown away after being used by people, and in the natural environment with microbes, warm, moist and oxygen, generally 3 to Within 7 months, the waste plastics began to crack and become brittle, and then began to break within 4 to 12 months and were digested by bacteria. In this process, the initial photodegradation and rapid decomposition are caused by the predegradation of metal ions in the additive. The heat energy absorbed and accumulated by this component contributes to the initial photodegradation, and the biodegradable polymer chains contained in the plastic, such as ester groups, ether groups, and amide groups, are cracked in the natural environment to be phagocytized and converted by microorganisms. Small molecule chain. The plant cellulose in the additive is mainly used to provide nutrients for the growth of microorganisms in the soil, so that various fungi grow rapidly in and out of the various small molecular membranes, and the small molecule pods become smaller and smaller. This causes the membrane to become crushed and eventually converted into carbon dioxide and water through the digestive system of the microorganism. This solves the problem that in the past, those plastic products made of artificial polymers were difficult to bio-digest due to the huge molecular structure and inhibition of microorganisms in nature as a carbon source.

It is worth mentioning that Kangwen Bio-Plastics Co., Ltd. has developed a kind of plastic packaging bag with high strength, thin thickness, high transparency, and rapid degradation using new technologies. It has overcome the commonly used plastic bags and must achieve a certain thickness to have strength. Or to achieve degradation of the "barriers. In other words, the same raw material, the use of biodegradable additives can be made more in line with the requirements of the use of plastic bags, degradation, so you can achieve cost and resource savings.

What is even more amazing is that with this technology, Kangwen Bioplastics has also successfully developed agricultural mulch films that can be automatically degraded according to the crop growth cycle. Zeng Xujun said that Kangwen can adjust the formula and the ratio to achieve specific requirements for the degradation time of agricultural crops by different crops, to ensure that before the next farming, the original film can be completely biodegraded into water and carbon dioxide, and can increase crop yields and Quality, this move can effectively eliminate the white pollution caused by agricultural film.

It is understood that bio-degradable shopping bags, biodegradable garbage bags, biodegradable pet food bags, biodegradable plastic tableware, etc. of Kangwen Bio-Plastics Co., Ltd. have been exported to the United States, Britain, Australia and other countries. The biodegradable additives developed by it are also used in Japan. Kuroda Electric Co., Ltd. purchases raw materials for the production of electronic packaging boxes (bags). The Qingdao municipal government has included them in the government's green procurement of environmental protection products. Some large shopping malls and meat products companies in Qingdao have also purchased their biodegradable plastic bags. As shopping bags and bags.

Source: Qingdao Institute of Science and Technology Information