Multi-layer co-extrusion production process of biaxially oriented polyethylene antibacterial and anti-fog film

Abstract

The invention discloses a multi-layer co-extrusion production process of a biaxially stretched polyethylene antibacterial and anti-fog film, which belongs to the field of films. The multi-layer co-extrusion production process of a biaxially oriented polyethylene anti-bacterial and anti-fog film can realize high production speed and output , at the same time, the film produced by this process has anti-fogging properties and high mechanical and optical properties. When the homogenization distributor is heated, a layer of interlayer can be formed between the inner extruded material and the outer extruded material, so that a transparent antistatic layer is formed between the subsurface layer and the outer layer of the formed film , on the one hand, it can effectively eliminate the static electricity of the finished film, and it is easy to use. On the other hand, the connection strength between the subsurface layer and the outer layer can be effectively improved through the transparent antistatic layer, and its mechanical properties can be significantly improved. At the same time, it can effectively improve optical properties of the film.

Description

technical field [0001] The invention relates to the field of films, and more specifically relates to a multi-layer co-extrusion production process of biaxially stretched polyethylene antibacterial and antifog films. Background technique [0002] PE film, that is, polyethylene film, refers to a film produced from PE film. PE film has moisture resistance and low moisture permeability. Polyethylene film (PE) can produce products with different properties such as low-density, medium-density, high-density polyethylene and cross-linked polyethylene according to different manufacturing methods and control methods. [0003] Polyethylene is a non-toxic, odorless white powder or granule, milky white in appearance, waxy in hand, and low in water absorption, less than 0.01%. Polyethylene film is transparent and decreases with increasing crystallinity. Polyethylene film has low water permeability but high air permeability, so it is not suitable for fresh-keeping packaging but suitable...

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Problems solved by technology

[0005] In the prior art, when a small width production line is used to produce biaxially oriented polyethylene film, the output of the extruder is low, the extrusion output is about 1 ton / hour, the speed of the production line is low, the speed is lower than 150 meters / hour, and only 10 tons can be produced per day Left and right, that is, the overall production efficiency is low, and the stability during production is poor, there are many film breaks during production, and the vertical and horizontal stretch ratio is small, the optical and mechanical properties of the product are poor, and there is no biaxially oriented polyethylene anti-fog in the prior art Membrane Technology

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