The materials used in degradable garbage bags are divided into the following four types:
Fully biodegradable materials, there are two types:
1. The whole biological corn starch can be composted degradable resin, and the starch can be combined with biodegradable bio-based materials to re-granulate, which can be used for blowing film and injection molding. The film is translucent beige. It's tough and soft, but it feels more moist, like silk. Tensile properties, blown film technology close to LDPE. After use, it is buried in the soil or compost is degraded into carbon dioxide and water in a microbial environment for 3 months, becoming organic fertilizer and returning to nature. The material will degrade only in the presence of microorganisms and humidity. If placed in the warehouse without sealing conditions can be stored for 1-2 years. After the carton package is sealed. It can be stored for 2-3 years.
2.PLA, also known as polylactic acid, is a resin formed by fermentation of starch into lactic acid monomer and polymerization of the monomer. Through our company research and development technology improvement, can be used for blowing film and injection molding. The film blown out is colorless and transparent, feels relatively crisp, and the quality of ordinary polypropylene PP is similar. After use, it is buried in the soil or compost is degraded into carbon dioxide and water in a microbial environment for 3-6 months to become organic fertilizer. Get back to nature.
Biodegradable cornstarch based biomaterials. There are two types:
1. The biomass content is more than 60%, and the rest is ordinary plastic; This material can only be added with LDPE or HDPE blend.
2. The biomass content is about 40%, and the rest is ordinary plastic. This material can be single blown film. No additional material is required. These two materials are also called biomass materials, in which the biomass content part can be degraded within two years. The identification standards of environmentally friendly biodegradable bags are different in each region, and Japan requires that the biomass content of more than 20% can be called environmentally friendly biodegradable bags; China's standard for biodegradable plastics is that if the degradation weight loss rate reaches more than 15%, it can be called biodegradable plastic bags.