Modified Biopolymer Polylactic Acid Plastic Pellets

1.Polylactic Acid market applications
Polylactic Acid has many applications and can be used in a variety of fields such as extrusion, injection molding, film pulling, spinning and more.
(1) Extrusion grade resin
Extrusion grade resin is the main market application of Polylactic Acid, mainly used in large supermarkets for fresh fruits and vegetables packaging, which has become an important member of the European market chain; and secondly, used in the packaging of some electronic products that promote safety, energy saving and environmental protection. In these uses PLA high transparency, high gloss, high steel and other advantages embodied in the fullest, has been the leading direction of PLA applications. In addition, extrusion grade resin in horticulture applications are beginning to gain attention, in slope greening, sandstorm management and other areas have been applied.
(2) Injection molding grade resin
In the market application of Polylactic Acid for injection molding, the more widely used is the modified resin. Although pure PLA has the advantages of high transparency and high gloss, its disadvantages such as hardness and brittleness, processing difficulty and heat resistance affect its application in injection molding. Of course, the chemical and plastics industries have been committed to solving these problems.
(3) Other grades of resin
Bidirectional stretch film is so far the most successful application of PLA film, after bi-directional stretching and heat-setting of the Polylactic Acid film heat-resistant temperature can be increased to 90 ℃, just to make up for the Polylactic Acid does not tolerate the defects of the high temperature. Through the adjustment of the bi-directional stretching orientation and molding process, it is also possible to control the heat sealing temperature of BOPLA film in the range of 70 to 160°C. This advantage is not found in ordinary BOPET film. This advantage is common BOPET does not have. In addition, BOPLA film light transmittance of 94%, very low haze, surface gloss is also very good, this type of film can be used for flower packaging, envelopes transparent window film, candy packaging and so on.
Polylactic acid nonwoven fabrics have been used in spunbond nonwoven fabrics, because of the implementation of China's plastic restriction, this nonwoven fabric used in the production of shopping bags on the more popular. The blown film, the two areas of the film because of some of the characteristics of the PLA itself defects, the application is still being further explored, some successful application cases is the use of PLA modified.
(4) Cardiac Stents
Soluble Polylactic Acid stents are designed to incorporate the benefits of existing devices without leaving a "metal spider" like a metal stent, which appears on X-rays of the patient when the coronary arteries are fully stented. Existing stents do not shrink and do not expand with the natural movement of the artery. Metal stents can cause fatal blood clots and may interfere with future tests and procedures.
2. Industrial Applications of Polylactic Acid
(1) Disposables field
The absolutely harmless nature of Polylactic Acid makes it uniquely suited for disposable products such as disposable tableware and food packaging materials. Its ability to completely biodegrade is also in line with the high demand for environmental protection in countries around the world, especially in the European Union, the United States and Japan. However, the disposable tableware processed with PLA raw material has defects such as temperature and oil resistance. This results in its functional role greatly reduced, as well as in the transportation of tableware deformation, material brittle, resulting in a large number of defective products. However, through technological development, the market has been modified by PLA materials, can effectively overcome the shortcomings of the original particles, and some even heat-resistant temperature of up to 120 ℃ or more, can be used as a microwave oven utensils materials.
(2) Biomedical field
Biomedical industry is the earliest application of Polylactic Acid. Polylactic acid has a high degree of safety to the human body and can be absorbed by the tissue, coupled with its excellent physical and mechanical properties, it can also be used in the field of biomedicine, such as disposable infusion tools, non-disassembly surgical sutures, drug-relieving packaging agents, artificial bone fracture internal fixation materials, tissue repair materials, artificial skin and so on. High molecular weight PLA has very high mechanical properties, and has been used to replace stainless steel in Europe and the United States as new orthopedic internal fixation materials such as bone nails, bone plates and is used in a large number of cases, and its absorption and metabolism by the human body makes patients free from the pain of the second incision. It has high technical added value and is a promising polymer material for the medical industry.

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(1)Rubber Products:When rubber products are molded, after being pressed under high pressure, the cohesion of the elastomer cannot be eliminated, which often produces unstable shrinkage when the product is molded out of the mold (the shrinkage rate of rubber varies depending on the type of rubber), which can only be eased and stabilized after a certain period of time. Therefore, when a rubber product design at the beginning, regardless of the formula or mold, need to be carefully calculated to match, if not, it is easy to produce unstable product size, resulting in low product quality.

(2)Water Treatment:The way of water treatment includes physical treatment and chemical treatment. Human water treatment methods have been quite a few years of history, physical methods, including the use of a variety of different pore size of the filter material, the use of adsorption or barrier way, the impurities in the water outside, adsorption method in the more important for the adsorption of activated carbon, barrier method is to pass the water through the filter material, so that the impurities of a larger size can not pass, and thus obtain cleaner water.