Wuhan Handern fully biodegradable plastics and films
DATE：2020/5/29 8:39:10 / READ： / SOURCE：This station
Wuhan Handern fully biodegradable plastics and films
Completely biodegradable plastics are plastics composed of substances that can be completely decomposed by microorganisms. The substances are mainly derived from natural materials such as starch, cellulose, chitosan and other polysaccharides. The final products of its degradation are CO and H20, which can be completely absorbed by nature without secondary pollution to the environment. Its main varieties are polylactic acid (PLA), polycaprolactone (PCL), thermoplastic aliphatic polyester (polybutene / succinic acid copolymer, polybutene / succinic acid / adipic acid copolymer), fat Group polycarbonates, polyhydroxybutyrate (PHB) and polyhydroxybutyrate (PHV), and their copolymers polyhydroxybutyrate (PHBV). In addition, polyvinyl alcohol can also be completely degraded by water and microorganisms. www.handern.com Breathable membrane equipment
At present, North America, Western Europe, Japan and other countries and regions have invested more resources in the field of research on fully biodegradable plastics, leading the world in technology level, and reporting on multiple brands, multiple applications, and commercialization. www.handern.com Breathable membrane equipment
According to information, the CDP company (Cargill Dow Plasties) in Nebraska, USA, has built a polylactic acid production plant in 2003 under the trade name "Nature Works". The annual output is 140kt and it is sold in the United States, Northern Europe and Japan. Japan Showa Polymer Co., Ltd. and Japan Showa Denko Co., Ltd. have been commercializing the production of thermoplastic aliphatic polyester since 1994 under the trade name "Bionolle (the two main products are 1000 series polybutene / succinic acid copolymer and 3000 series (Polybutene / succinic acid / adipic acid copolymer), which is a biodegradable plastic made by condensing raw materials (ethylene glycol and dicarboxylic acid) through chemical reaction, and its film is buried in the taxi It can be completely decomposed in 6 months by the action of microorganisms and is stable in the air. It is used in agriculture, civil engineering, garbage bags, packaging films and other fields. Toyota of Japan uses plant starch to synthesize polylactic acid. For this reason, the starch rate has been cultivated It is 30% higher than the normal variety of red, and is ready to be planted in Sumatra, Indonesia, to plant 10,000 hectares. A factory is built in the middle of this farmland to process sweet potatoes into plastic. Www.handern.com Breathable membrane equipment
The starch, cellulose acetate, and polycaprolactone biodegradable material (mater-Bi) developed by the Italian company Novamon t is used to make disposable tableware. It was successfully used in the 2000 Sydney Olympic Games. The used waste together with biological waste , Composting treatment, a better solution to the reuse of disposable tableware waste, to achieve the Olympic Games. Japan's Sanyo Sumiyoshi, ア and Sanwa Chemical jointly developed lactic acid using corn as raw material, and made the world's first plastic disc made of plants. This disc has excellent optical properties and good durability at normal temperature. According to the introduction, a corn plant can be processed into 10 compact discs. Www.handern.com Breathable membrane equipment
Polylactic acid has better molding processability for other biodegradable plastics, and its viscosity is highly dependent on temperature. Soft polylactic acid has better melt fluidity than hard polylactic acid. The potential disadvantage is that the glass transition temperature of the polymer is relatively low, only 58 ℃, so its high temperature resistance is poor. Polylactic acid can use ordinary plastic molding equipment for extrusion blown film, extrusion molding, injection molding. The molding temperature range of hard polylactic acid is 180-200 ℃; the molding temperature range of soft polylactic acid is 160 ～ 180 ℃. Polylactic acid film can be used for secondary processing such as printing, bag making, vacuum forming, etc. www.handern.com Breathable film equipment
Polylactic acid is easy to absorb moisture and changes with the surrounding environment. The usual saturated water content is 0.4%. In order to prevent the hydrolysis of polylactic acid in the production process, a vacuum dryer or dehumidification dryer should be used to dry and dehumidify before molding. The moisture content should be controlled below 50mg / kg. Polylactic acid can be blended with thermoplastic aliphatic polyester degradable plastics. The polylactic acid film has good mechanical properties, rigidity and gloss, oxygen permeability resistance, good odor barrier, and food safety. www.handern.com Breathable membrane equipment
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