Degradable environment-friendly plastic film and its production process

Abstract

The invention discloses a degradable environment-friendly plastic film, which comprises the following components in parts by weight: 75-80 parts of hydrophobic composite polylactic acid, 4-6 parts of composite flame retardant, 12-15 parts of liquid paraffin, dodecylbenzenesulfonate 2-3 parts of sodium bicarbonate, 1-2 parts of nano-titanium dioxide, 2-3 parts of antioxidant, 4-5 parts of plasticizer. The present invention grafts serine through semi-saponified oil, and simultaneously polymerizes the prepared hydrophobic serine and L-lactic acid, and the main chain of the prepared hydrophobic composite polylactic acid is connected by hydrophobic serine and L-lactic acid, and the branch chain is semi-saponified oil, so that the bacteria When acting, it acts on hydrophobic serine, L-lactic acid and semi-saponified oil at the same time. At the same time, because serine can provide the necessary nutrients for the growth of bacteria, the bacteria can reproduce rapidly and realize the decomposition of serine, so that serine and L- Compared with the traditional plastic film directly polymerized with L-lactic acid, the plastic film obtained by lactic acid polymerization has a faster degradation rate, and can be completely degraded within 30 days.

Description

technical field [0001] The invention belongs to the field of environment-friendly plastic preparation, and relates to a degradable environment-friendly plastic film and a production process thereof. Background technique [0002] Plastic films are widely used in greenhouses, packaging bags and other fields. In order to achieve high toughness and durability of plastic films, existing plastic films are usually made of polyethylene materials. The degradation of polyethylene plastic is very difficult and easily causes white pollution. , in order to realize the degradability, the plastic prepared by polylactic acid has been developed, the plastic prepared by polylactic acid can be decomposed into water and carbon dioxide through the action of bacteria, and the degradation ability of the plastic film can be realized, but the degradation rate is slow, and the direct use of polylactic acid In order to achieve its hydrophobicity and flame retardancy, the direct plastic film directly a...

AI Technical Summary

Problems solved by technology

[0004] The present invention grafts serine through semi-saponified oil, and polymerizes the prepared hydrophobic serine and L-lactic acid at the same time, and the prepared hydrophobic composite polylactic acid matrix contains semi-saponified oil, which has high hydrophobic ability, and then makes the prepared plastic film hydrophobic Uniform dispersion, which solves the problem that the existing plastic film is directly added with a hydrophobic agent. Due to the poor dispersion performance of polylactic acid, the hydrophobic agent is unevenly dispersed in polylactic acid, resulting in uneven hydrophobicity at different positions of the prepared plastic film.

[0005] After the hydrophobic serine and L-lactic acid of the grafted vegetable oil are polymerized in the present invention, since the polymer itself contains semi-saponified oil groups, the polymer itself has a relatively high dispersibility. When the flame retardant is added to the polymer, the polymerization The flame retardant is directly dispersed by the material, so that the flame retardant performance of the prepared plastic film is uniform, which solves the problem that the existing plastic film is directly added with a flame retardant. Due to the poor dispersion performance of polylactic acid, the flame retardant in polylactic acid Uneven dispersion, resulting in uneven flame retardancy at different positions of the prepared plastic film

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