Production process of environment-friendly food packaging film

Abstract

The invention discloses a production process of an environment-friendly food packaging film, and relates to the technical field of packaging films. The production process of the environment-friendly food packaging film comprises an auxiliary device and a mold, wherein the auxiliary device comprises an outer frame, an inner frame is arranged on the outer frame, a pressurizing mechanism is fixedly connected to the outer frame through telescopic rods, and pressure sensors are arranged at the bottom of the pressurizing mechanism. According to the production process of the environment-friendly foodpackaging film, built-in grooves are formed during production, so that the bonding area between layers is increased, epoxy resin powder is arranged in the built-in grooves at the same time, the adhesion between the different layers is further increased, and the dispersion between the different layers is avoided; and a polyhydroxyalkanoate layer is added between a polyethylene layer and the mixedlayer of polyvinyl chloride and polypropylene ethylene, and the decomposition rate is well guaranteed while the usage amount of polyhydroxyalkanoate is limited, so that the burden of environmental decomposition is reduced on the premise of ensuring the cost.

Description

technical field [0001] The invention relates to the technical field of packaging films, in particular to a production process of an environment-friendly food packaging film. Background technique [0002] The packaging film is mainly made of several different grades of polyethylene resin mixed and extruded. It is puncture-resistant, super-strength and high-performance. It wraps the goods stacked on the pallet to make the package more stable and tidy, and more super waterproof. It is widely used in foreign trade export, paper making, hardware, plastic chemical industry, building materials, food and medicine industries. [0003] In the prior art, only one material or multiple materials are used for simple heating and lamination to carry out the production operation of the packaging film (due to the small thickness of the packaging film, it is impossible to use an adhesive as an intermediate for different materials For lamination, only heat lamination can be used), if a single ...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a production process of an environment-friendly food packaging film, which solves the problem of using only one material or multiple materials for simple heating and bonding in the prior art to make the packaging film production operations (due to the small thickness of the packaging film, it is impossible to use adhesives as an intermediate to bond different materials, and only heat bonding can be used), if a single material is used, it is difficult to combine multiple properties (environmental protection, heat insulation, stretch resistance and light transmittance) meet the needs of users at the same time. If a variety of materials are used for simple heating and bonding, the packaging film will easily fall apart. At the same time, when the packaging film is discarded and decomposed , there is no gap between different layers, and it can only be decomposed by anaerobic microorganisms (although there are environmentally friendly packaging films made of polyhydroxyalkanoate in the prior art, polyhydroxyalkanoate is expensive, and if the film material Both are polyhydroxy fatty acid esters, which will lead to a linear increase in the cost of the packaging film), reduce the decomposition speed of the packaging film, and bring a certain degree of burden to the environment

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