Pure lactic acid is a colorless liquid, is a colorless to pale yellow liquid. Odorless, hygroscopic. The relative density of 1.2060 (25/4 ℃). Melting point 18 ℃. Boiling point 122 ℃ (2kPa). Refractive index nD (20 ℃) ??1.4392. With water, ethanol, glycerin, insoluble in chloroform, carbon disulfide and petroleum ether. Heating under normal pressure, concentrated to 50%, part of the anhydride into milk, thus products often contain 10% -15% of the milk anhydride.
2013年8月20日星期二
This first industrialized polylactide
This first industrialized Ethyl lactate biodegradable plastic materials in packaging and other fields has been widely applied. Retail giant Wal-Mart led to large retailers began several years ago to promote the use of polylactic acid transparent rigid packaging boxes and bags, and more and more retailers joined the ranks.
Weight 14 grams of ordinary polyethylene packaging material if modified polylactic acid material to replace the quality ferrous lactate . Polylactide realize tons of industrial production, the price will be close to conventional polyethylene film. Green plastic packaging will then closer to us.
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