Lactic acid is an important raw material for the food and pharmaceutical industries. As a commonly used sour agent for food and beverages, the annual sales volume of lactic acid in the global market has reached 10,000 tons.
American scientists discovered a few years ago that ordinary industrial grade lactic acid can be converted into a milky white new degradable high-grade raw material—polylactic acid. This raw material has many advantages and is widely used.
As the basic raw material of polylactic acid is lactic acid, it is one of the body's inherent physiological substances, and it is non-toxic and harmless to the human body. Therefore, as an important raw material, polylactic acid can be processed into a variety of downstream products like thermoplastics such as polyvinyl chloride, polypropylene, and polystyrene, including films, bags, packaging boxes, food containers, and disposable snack boxes. Beverage bottles, etc. Because of its good air permeability, it can also be used as an excellent material for spinning woven fabrics, into polylactic acid underwear, coats and socks and other textiles. At the same time, it can be processed into medical fabrics that are used by doctors, nurses, and patients in hospitals, as well as bed linen and other medical textiles. They can be automatically degraded after use and will not pollute the environment.
Another major use of polylactic acid is the processing of agricultural mulch to replace the commonly used polyethylene agricultural film. The biggest advantage of this product is that it does not require manual cleaning after use for a period of time. It will work together with microorganisms and light in the soil to automatically decompose into carbon dioxide and water, effectively solving the environmental pollution caused by polyethylene agricultural film.
The United States is one of the first countries in the world to develop polylactic acid. It is understood that since 1998, the annual production of polylactic acid in the United States has reached 2,100 tons. Due to the trial production period, the price of polylactic acid raw materials is relatively expensive (the production cost of polylactic acid per pound is about 1 to 2 US dollars, which is much higher than the cost of ordinary plastics). According to the latest report from foreign publications, ADM has established a one-stop advanced production line that uses corn as raw material to produce industrial lactic acid and synthetic polylactic acid through the fermentation of corn starch. It is estimated that by 2003, the total output of polylactic acid in the United States will reach 13,000 tons. With the increase in production, the production cost and sales price of polylactic acid will be greatly reduced compared with the current period, and it will eventually be accepted by many manufacturers.
With the development of the times and the progress of science and technology, polylactic acid, as a widely used environmental protection polymer new material, has a promising development prospect.
Development and Application Prospect of Polylactic Acid
December 20 10:09:15, 2023
6 Colors Pen,4-in-1 Multi Color Pen,6 Colors Multicolor Ballpoint Pen,6 Colors Multicolor Pen Tonglu shangmei pen industry co.,ltd , https://www.shangmeipenindustry.com