Environment-friendly BOPP flexible package film and preparation method thereof

Abstract

The invention discloses an environment-friendly BOPP flexible package film and a preparation method thereof. the package film is prepared from the following raw materials imparts by weight: 10-20 parts of polypropylene, 15-30 parts of polyhydroxyalkanoate, 5-10 parts of silk fibroin, 6-13 parts of carboxymethyl cellulose, 4-8 parts of chitosan, 4-8 parts of polycaprolactone, 5-12 parts of gliadin,3-7 parts of talcum powder, 4-10 parts of polylactic acid, 5-9 parts of butyl epoxy soyate, 3-6 parts of phytic acid and 2-6 parts of N-dodecyl-N,N-dimethylglycine. The tensile strength of the package film provided by the invention is greater than 15MPa, the elongation at break is greater than 155% and the water absorption is less than 4.0%, so that the package film has good tensile strength, elongation at break, impact resistance and low water absorption, and the durability of the packaging film is improved. Meanwhile, the raw materials used by the package film are green, environmentally friendly and free of pollution, and the main materials are easy to degrade, so that the package film have a wide application prospect in the field of environment-friendly packaging films.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly materials, and in particular relates to an environment-friendly BOPP soft packaging film and a preparation method thereof. Background technique [0002] At present, the annual consumption of various common plastic BOPP films in my country is about 1.30-1.35 million tons. Mainly various common BOPP films, such as BOPP printing film, paper-plastic composite film, adhesive tape film, etc. Among them, the highly transparent, heat-sealable, and heat-shrinkable BOPP films used for the packaging of small commodities such as food, cigarettes, beverages, and stationery account for about 135,000 to 140,000 tons. [0003] There are various high-transparency, high-gloss, heat-sealable, and heat-shrinkable BOPP films that play an important role in the beautification and protection of various cigarettes, food, beverages, stationery and other small commodities, especially cigarette packaging films....

AI Technical Summary

Problems solved by technology

However, packaging films such as cigarettes cannot be effectively degraded. Due to the existing BOPP heat shrinkable film, after opening the package, it becomes a discarded waste film, and these discarded waste films are ordinary polypropylene plastic films, which cannot be degraded or recycled. value, and it is inconvenient to recycle, it can only be directly turned into garbage

These ordinary polypropylene plastic waste films cannot be decomposed within decades after being buried deep in the garbage. If they are collected and burned together with the garbage, they will also cause environmental pollution. Therefore, these non-degradable waste films have become the biggest hazards to the social environment. one of the factors

[0004] There are already some environmentally friendly BOPP films in the prior art. However, the overall performance of the films is poor and not durable. Therefore, it is necessary to further improve the existing BOPP films.

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