High-transparent high-barrier and easy-taking opening sealing cover membrane and production technology thereof

Abstract

The invention relates to a high-transparent high-barrier and easy-taking opening sealing cover membrane and a production technology thereof. The membrane layer structure of the membrane sequentially comprises a PET membrane layer, an alumina coating layer, an oil ink layer, an adhesive layer and an EVOH co-extrusion membrane layer from outside to inside; and the EVOH co-extrusion membrane layer comprises a compound layer A, a sub outer layer B, a binding layer C, a middle layer D, a binding layer E, a sub outer layer F and a hot sealing layer G. The high-transparent high-barrier and easy-taking opening sealing cover membrane is obtained through innovation on the EVOH co-extrusion membrane layer formula. The membrane product has the high transparency and low haze, can well display the packed content and attracts consumers. The alumina coating PET and the EVOH co-extrusion membrane layer jointly form a double-barrier layer, so that the membrane has the outstanding moisturizing, air barrier and fragrance preserving functions, and provides safety guarantee to food. A polybutylene easy-taking layer in the hot sealing layer G can be well sealed with various kinds of materials such as PP,PE and PS, the controllable peeling strength can be guaranteed, and the user experience of the consumers is greatly improved.

Description

technical field [0001] The invention belongs to the field of packaging film materials, and in particular relates to a high-transparency, high-barrier and easy-to-remove lid film and a production process thereof. Background technique [0002] At present, quite a lot of food on the market, such as low-temperature yogurt, jelly, cooked food, fresh fruit, etc., is packaged in the form of cups or trays. Cups or trays need to use sealing lid materials, most of which are composite films. For ease of use by consumers, most lid materials are required to have easy-peel properties. At present, the domestic easy-to-remove cup lid films all use composite films, and the sealing layer in the composite films uses films with easy-to-remove functions, such as ethylene-vinyl acetate copolymer (EVA) films, or elastomer materials. Ethylene-vinyl acetate copolymer (EVA) films are mostly combined with barrier materials such as Al (VMPET) to form composite films. The production cost is high and pr...

AI Technical Summary

Problems solved by technology

The former composite film is a non-transparent film, which is only suitable for sealing polar materials, and has high production costs and difficult processing; the latter composite film is a transparent film with general barrier properties, uncontrollable sealing strength, and general easy-to-remove performance.

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