Biodegradable novel copolyester

In the United States, there are more than 200 million tons of solid wastes each year, of which about 62% are landfilled, 15% are used to produce energy incinerators, 1% are generally burned, and 22% are recycled. From the viewpoint of saving resources and turning waste into profits and the sequelae caused by incineration, for a long time, waste materials such as paper, broken glass, aluminum, fiber, and plastics are often recycled and reused; another alternative is to solve waste plastics and synthetic fibers. The method of manufacturing the product is to use a biodegradable material and convert the base polymer into an organic component through a composting process or the like. The main challenge in the development of biodegradable polymers is that these materials should be structurally and functionally stable during storage and use, while discarded after use can degrade microorganisms and the surrounding environment. In addition, the resin must also have a certain degree of processability, can be made into films and fibers with desirable properties. What is needed and popular in the market is the desire to provide high-performance resins that can be processed smoothly on existing equipment. At present, the main factors that hinder the development of biodegradable fibers and plastics are the production of the materials themselves, and the second is that the industrial production efficiency is not yet ideal. Eastman Chemical Company recently introduced a new copolyester, Eastar-Bio®, which meets various requirements. It is an aliphatic, aromatic polycondensation copolymer made from adipic acid, terephthalic acid and butanediol. . In addition to being used as a film and coating material, it can also be melt-spun into single-component or two-component consolidated fibers, or spunbonded, meltblown nonwovens. Spunbonded products are semi-crystalline, with elasticity, good drape, soft feel, and no sound. Like many ordinary PETs, it can be gamma sterilized and ultrasonically RF-fixed. Developed a wide range of disposable and limited-use areas including sterile medical covers, surgical packaging materials, wipes, absorbent core materials, aptamer hygiene products, breeding mats, floor coverings and other seasonal agriculture/horticulture Fabrics, thermoformed products and various laminates. This material meets the sanitary requirements for direct and food contact between the United States and European Union countries, and meets or exceeds the biodegradability targets set by the German DIN standard, and meets the requirements of the Japan Society of Degradable Plastics and the United States Composting (Processing) Association. Eastman Chemicals has applied for a patent on this resin and its special thin film structure. The company has a factory with an annual capacity of 15,000 tons in the UK, and has production sites for polyester products around the world - Malaysia, Europe, and North America - to transform its production lines and expand production capacity.