Fully-degradable plastic film having fresh keeping function and used for packages and preparing method thereof
A technology for plastic film and packaging, applied in the field of fully degradable plastic film for packaging and its preparation, can solve problems such as poor compatibility with polylactic acid, improve the interface contact effect, compatibility, and scientific and reasonable composition ratio , the effect of a wide range of sources
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[0017] specific implementation plan
[0018] The present invention will be described in detail below through specific examples.
[0019] A fully degradable plastic film for packaging with fresh-keeping effect, prepared from the following raw materials in parts by weight (kg): polylactic acid 80, hemp fiber 25, silane coupling agent kh-550 0.8, corn starch 20, glycerin 12 , Epichlorohydrin 1.6, appropriate amount of 1mol / L sodium hydroxide solution, appropriate amount of 1mol / L hydrochloric acid, appropriate amount of distilled water, porous starch 5, magnesium stearate 1, coarse porous silica gel 3, tourmaline powder 5;
[0020] A fully degradable plastic film for packaging with a fresh-keeping effect described in the present invention is made by the following specific steps:
[0021] (1) Put the hemp fiber into a double amount of 1mol / L sodium hydroxide solution, heat it to 100°C under normal pressure, cook for 2.5 hours, take it out after cooling, wash it with 1mol / L hydroc...
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