A kind of production technology 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 includes an auxiliary device and a mould. The auxiliary device includes an outer frame, an inner frame is arranged on the outer frame, and a pressurizing mechanism is fixedly connected to the outer frame through a telescopic rod. The bottom of the pressurizing mechanism is provided with a pressure sensor. The production process of this environment-friendly food packaging film increases the bonding area between layers by setting built-in grooves during production, and at the same time, setting epoxy resin powder in the built-in grooves further increases the adhesion between different layers , avoiding the falling apart between different layers, and adding a polyhydroxyalkanoate layer between the polyethylene layer and the mixed layer of polyvinyl chloride and polypropylene, which can ensure the decomposition while limiting the amount of polyhydroxyalkanoate Speed, so as to reduce the burden of environmental decomposition under 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 has puncture resistance, super strength and high performance. It wraps the goods stacked on the pallet to make the packaging more stable and tidy, and more 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 heat lamination to carry out the production operation of the packaging film (due to the small thickness of the packaging film, it is not possible to use an adhesive as an intermediate for different materials For lamination, only heating lamination can be used), if a single mate...

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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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