Production technology of food-grade bidirectional film easy to uncover and easy to tear and pull

Abstract

The invention relates to the production technology of a food-grade bidirectional film easy to uncover and easy to tear and pull. The technology comprises the steps that firstly, the extruding workingprocedure is carried out, wherein an extruding machine extrudes out the food-grade bidirectional film easy to uncover and easy to tear and pull, the food-grade bidirectional film easy to uncover and easy to tear and pull comprises three layers, the content of LDPE of the outer layer is larger than or equal to 90%, and the content of COC is smaller than or equal to 10%; the content of LDPE of the middle layer is larger than or equal to 75%, the content of HDPE is larger than or equal to 10%, and the content of COC is smaller than or equal to 10%; the content of EVA of the inner layer is largerthan or equal to 40% and smaller than or equal to 50%, the content of LDPE is larger than or equal to 50% and smaller than or equal to 60%, the content of an anti-block agent is smaller than or equalto 3%, and the content of a slipping agent is smaller than or equal to 3%; secondly, the film blowing working procedure is carried out; and thirdly, the rolling working procedure is carried out. The rolling working procedure comprises the steps that a), a new rolling roller to be rolled is fed and installed; b), an old rolling roller which completes the rolling work is moved out; c), the film is cut and separated; d), the new rolling roller carries out rolling automatically; e), the old rolling roller is output; and f), the old rolling roller is packed. The technology solves the technical problems that during rolling work, automatic roller replacing work of the rolling roller cannot be carried out, meanwhile, the rolling roller completing rolling work cannot be output automatically, and the working efficiency is low.

Description

technical field [0001] The invention relates to the technical field of food-grade two-way easy-to-remove and tear-off films, in particular to a production process for food-grade two-way easy-to-remove and tear-off films. Background technique [0002] Food-grade two-way easy-to-open and easy-to-tear film is used for snack food packaging. It is a 3-layer co-extruded film, mainly using LDPE+nano-additives / LDPE / LDPE+nano-additives. At present, films are more and more widely used in our production and life. It has been widely used in food, medicine, chemical industry and other fields, among which food packaging accounts for the largest proportion, which has brought great convenience to people's life. [0003] The patent document with the patent number CN2015100664543 discloses a double-sided reciprocating continuous high-efficiency coating magnetron sputtering roll-to-roll coating machine for rapid target change, which belongs to the field of coating equipment. In the present in...

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art. By setting the unloading mechanism to cooperate with the switching mechanism, the old winding roller is rotated from the winding station to the transmission station after completing the winding work, and under the action of the control component Automatically open the switching mechanism, the old rewinding roller actively rewinds the remaining food-grade two-way easy-to-remove and easy-tear film after cutting, and then uses the gluing component to complete the automatic packaging of the film tail, and then realizes the rewinding after the completion of the rewinding work The active discharge and packaging work of the roll solves the technical problems that the automatic roll change of the winding roll cannot be carried out during the winding work, and the automatic output of the winding roll that completes the winding work cannot be realized at the same time, and the work efficiency is low.

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