High-stiffness high-strength heat-sealing embossed film and preparation method thereof

Abstract

The invention relates to a high-stiffness high-strength heat-sealing embossed film and a preparation method thereof, in particular to a thin film applied to a curtain coating technology. The densities of film layers are controlled through components, and the deformation trend of each layer of the three-layer coextruded curtain coating film embossed film is optimized by refining processing technique, so as to obtain the high-stiffness high-strength heat-sealing embossed film. The embossed film has the advantages of great elastic modulus, high tensile strength, good heat-sealing property and excellent processing property. The thickness can be effectively reduced when the embossed film is used, so as to save cost. The embossed film can be used on occasions highly requiring anti-pollution heat-sealing.

Description

technical field [0001] The invention relates to a high-definition, high-strength heat-sealing performance embossed film and a preparation method thereof, in particular to a film prepared by a casting embossing process. Background technique [0002] Most of the composite plastic flexible packaging materials are composed of several layers of film, generally composed of film layers with different functions, for example: the adhesive layer provides heat sealing performance, usually blown polyethylene (IPE) film , cast polyethylene (CPE) film, cast polypropylene (CPP) film and EVA (ethylene-vinyl acetate copolymer) film; the substrate layer provides good mechanical properties and functional properties, generally biaxially stretched polyester film (BOPET), biaxially oriented nylon film (BOPA), biaxially oriented polypropylene film (BOPE), coated polyvinylidene chloride film (PVDC), polyvinyl alcohol film (PVA), aluminum foil, paper, etc. have good barrier properties s material. ...

AI Technical Summary

Problems solved by technology

However, the current composite plastic flexible packaging materials generally have the disadvantage of being thicker, and the raw materials used are more and the cost is higher.

[0003] In addition, in order to reduce the cost of materials, the thickness of the cast film is often thinner, and the mechanical properties of the cast film are correspondingly reduced with the thickness. During the processing and use of

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