What is the raw material for producing corn starch plastic film?
Starch and biodegradable plastics mixing of biomass materials currently used most commonly used aliphatic polyester or aliphatic polyester mixed starch manufacturing, aliphatic polyester mainly includes the use of renewable resources as raw materials for the production of poly lactic acid, by microbial synthesis of polyhydroxyalkanoates (PHB, PHA), as well as for petroleum polycaprolactone synthesis the raw materials (PCL), polybutylene succinate (PBS) and its copolymer. Using starch and biodegradable polymer material mixing technology can produce a completely biodegradable plastic film and packaging materials, close to the performance of plastic, and theoretically solve the biodegradable polymer material with the characteristics of molecular design, molecular tailoring and chemical modification of starch, physical and chemical modification, can obtain good performance and low cost and control the degradation period can be completely biodegradable materials.
According to the current technical level, the production of 1 tons of starch requires 1.5 tons of corn, power consumption of 200KWh, coal consumption of 0.3 tons. If the 1 tons of starch into biomass plastics, can be processed into 1.01.2 tons of products, instead of common plastics, saving petrochemical resources, the country. Because there is no effective stimulating mechanism in the downstream market, the application of corn starch is still limited to the research area of modified starch. The industrialization of biomass plastics with corn starch as the main raw material will effectively stimulate the cultivation of corn and the production of cornstarch. Biomass plastics are gradually evolved from the further research and development of biodegradable plastics. It is gradually recognized that only by fully utilizing the natural and recyclable plant resources to develop and develop biomass plastics is a reliable way to achieve sustainable economic development. In the past 30 years, and in half a century, all countries in the world pay attention to and invest a lot of manpower and material resources of biomass plastics, mainly starch and biodegradable plastics mixing, carbon dioxide copolymer, biosynthesis of biodegradable plastics, and then generate a biosynthetic precursor chemical polymerization of biodegradable plastics in 4 categories. The latter three prices are higher, but the cost is higher, mainly used in medical materials, biomedical engineering and tissue engineering and other high-value products.
At present, China's maize production in 1.31.5 million tons, only 1/10 of the corn crop is processed into starch, used in the textile industry, paper industry, food industry, medical industry and other fields, the total amount of nearly 10 million tons of starch (including corn starch close to 9 million tons; 420 thousand tons of cassava starch, potato starch, 240 thousand tons).
It is corn starch raw materials of corn plant starch is a natural polysaccharide polymer, the molecular weight of up to 3 million Dalton, is a common concern at home and abroad can be used as the ideal material for the direct application of the polymer materials. Plant starch is divided into grain starch (corn starch, sorghum starch, wheat starch, rice starch) and potato starch (tapioca starch, potato starch, konjac starch).
