Biodegradable materials are widely used and can be used as complete biodegradable plastic materials and products. Products include starch-based full biodegradable shopping bags, roll-up bags, flat bags, high-performance biodegradable fresh-keeping bags, high starch content biodegradable municipal garbage sorting bags, biodegradable express bags, water-soluble washing packaging bags, agricultural film, industrial packaging bags, electronic products. Such products as packaging bags, disposable snack utensils, beverage bottles and cups. These products are derived from natural plants such as maize and cassava, in which the biological content is more than half of the total, and can be degraded completely within 90 days.
Starch-based biodegradable plastics, a green environmental leader, is a kind of plastic product made by blending starch with other polymers after modification and grafting reaction. It can replace general plastics in industry, and can be used as packaging materials, shockproof materials, plastic film, food containers, toys and so on. The properties of starch are related to the relative molecular weight of starch, the length of amylopectin and the ratio of amylose to amylopectin. Experiments show that starch with high amylose content is more suitable for preparing plastics. The products obtained have better mechanical properties. At present, the mechanical properties of starch plastics have basically reached the standard of traditional plastics. However, because starch itself has water absorption, the material will absorb water in wet environment, which will lead to a serious decline in mechanical properties. The higher the starch content, the more serious the problem is. Some starch plastics It can even dissolve completely with water.
Starch biodegradable materials and thermoplastic starch plastics are not only used as new degradable materials, but also used in textile, medicine, quick-frozen food, papermaking, building materials and other industries. Therefore, starch production industry is one of the industries with good development prospects and large market demand. At present, the domestic equipment for starch production is relatively mature, which can be fully automated from raw material delivery to finished product packaging.