Novel low-temperature easily heat-sealed blown film formula and production process thereof

Abstract

The invention discloses a novel low-temperature easily heat-sealed blown film formula. The formula comprises the following components in percentage by mass: 10-15% of low-density polyethylene, 30-40% of a high-performance PE polymer, 20-30% of metallocene polyethylene A, 15-25% of metallocene polyethylene B and 5-10% of an elastomer. The invention further discloses a production process of the novel low-temperature easily heat-sealed blown film. The production process comprises the steps of outer-layer film blowing, middle-layer film blowing, inner-layer film blowing, fusion of all the layers and shaping and cooling. According to the invention, by changing the formula of the film, on the premise of high stiffness of the film, the film has good toughness and soft and smooth feeling, and by adding the high-performance PE polymer, the film has good appearance texture, strong tensile force, strong toughness and strong impact resistance; and the preparation process is scientific and reasonable, low in equipment requirement and good in popularization effect.

Description

Technical field[0001]The present invention relates to the field of thin film production, and in particular, a new type of low-temperature easily heat-sealed blown film formulation and its production process.Background technique[0002]The PE film, ie the polyethylene film refers to the film produced by the PE film, the PE film has moistureproof, small moisture permeability; the polyethylene film (PE) can produce low density, medium density according to the manufacturing method and the control method. Product, high-density polyethylene and crosslinked products such as different properties such as crosslinked polyethylene; but conventional PE film generally has the following disadvantages: high temperature temperature, difficult to seal, toughness, bag seal temperature effect, the print pattern is not beautiful, No barrier resistance; traditional silica, magnesium oxide matters (melt index of 4 g / 10 minutes, density 0.93 g / cm)3), Can form microparticles having a diameter of less tha...

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Problems solved by technology

[0002] PE film, that is, polyethylene film, refers to a film produced with PE film. PE film has moisture resistance and low moisture permeability; polyethylene film (PE) can produce low-density and medium-density films according to different manufacturing methods and control methods. , high-density polyethylene and cross-linked polyethylene and other products with different properties; but traditional PE films generally have the following disadvantages: high sealing temperature, difficult sealing temperature, no toughness, poor sealing effect of bags, unattractive printing patterns, No barrier properties; traditionally used silica, magnesium oxide matting masterbatch (melt index 4 g / 10 minutes, density 0.93 g / cm 3 ), can form micro-particles with a diameter of less than 2 microns on the surface of the extruded film, and a large number of irregular micro-particles attached to the surface produce diffuse reflection to the surrounding light, greatly reducing the smoothness and gloss of the product surface, making the plastic film produce " Paper-like effect; therefore, we propose a new blown film formula and its production process that are easy to be heat-sealed at low temperature

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