Novel plastic film and preparation method thereof

Abstract

The invention discloses a novel plastic film. The novel plastic film comprises the following raw material components in parts by weight: 100 parts of polyethylene, 20-30 parts of polylactic acid, 65-80 parts of a PBM degradable material, 10-15 parts of filler, 5-10 parts of lignocellulose, 3-5 parts of an anti-oxidant, 1-1.5 parts of an ultraviolet light absorber, and 25-30 parts of a nano flame retardant compound. The invention further provides a preparation method for the plastic film. According to the method, a mature modified starch degradable plastic master batch PBM in the current marketis selected to be mixed with Pullulan polysaccharide and film-level LDPE for extruding and film-blowing, with the features of the LDPE, good mechanical properties of the film is ensured; with biodegradability of the PBM and the Pullulan, environment friendliness of the film material is realized; with high oxygen insulation of the Pullulan, the oxygen insulation of the film material is improved; with similarity of the starch and the Pullulan as carbohydrates in structure, entire compatibility of the plastic film material is improved; and through controlling a blending matching ratio of a LDPE / PBM / Pullulan system, the control on the oxygen insulation and the biodegradability and the like is realized.

Description

technical field [0001] The invention relates to a plastic film, in particular to a novel plastic film and a preparation method thereof. Background technique [0002] As we all know, the plastic bag made of plastic film is light, thin, impermeable, strong, and low in cost. It is a good packaging material. The amount of bags is increasing, and the waste plastic bags after use are not easy to recycle and degrade. A large number of waste plastic bags have become a serious problem that pollutes the environment. In order to reduce the pollution of plastic films to the environment, people have developed some environmentally friendly green new plastic films. This type of degradable plastic film consists of film-grade plastics and components that can cause plastic degradation, such as starch and calcium carbonate. etc. This new plastic film is an additive new plastic film, and the additive new plastic film has played a certain positive role in improving the environment. But the pro...

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Problems solved by technology

[0004] In addition, the degradation of this new type of plastic film requires certain fixed conditions, and the environment after the plastic film is discarded is either placed in a closed garbage disposal system or exposed to a natural environment with unstable conditions, which is difficult to guarantee. The fixed conditions required for the degradation of this plastic film, these degradable plastics in most cases, whether in the garbage disposal system or in the natural environment, cannot be degraded well due to limited conditions

In the prior art, there is no new type of plastic film that can guarantee degradation in the environment after being discarded