Special film for automatic laminating machine adopting double-sided corona and preparation method of special film

Abstract

The invention discloses a special film for an automatic laminating machine adopting double-sided corona and a preparation method of the special film. The special film for the automatic laminating machine adopting double-sided corona comprises a corona printing surface layer, a core layer and a composite layer, wherein the core layer is a middle layer; raw materials of the layers are mixed, enter respective extruders and are heated, then an obtained mixture enters a die head and is cooled into a thick sheet through quenching sheet casting, the thick sheet after water bath is subjected to MDO and TDO processing, a thin film is obtained, thickness measurement and trimming are performed, trimming waste is ground and recovered to a mixed material conveying step for mixing together, the trimmed thin film is subjected to corona treatment, then the thin film is subjected to rolling up, aging treatment and slitting respectively, and a finished product is obtained finally through packaging. By means of gradual improvement of raw material and process formulae and gradual adjustment of equipment precision and detection standards, the currently produced product can meet the high requirements for avoidance of static electricity and the friction coefficient being smaller than 0.2, and a tail breaking phenomenon is avoided when the film is applied to the automatic laminating machine.

Description

technical field [0001] The invention relates to film production technology, in particular to a special film for a double-sided corona automatic film laminating machine and a preparation method thereof. Background technique [0002] The laminating machine is a special equipment for paper, board, and film lamination. It is pressed together by a rubber roller and a heating roller to form a paper-plastic product. It has a wide range of applications and stable and reliable processing performance. At present, the laminating equipment is widely used in China. [0003] With the advancement of modern technology, the hand-operated laminating machine has been gradually replaced by a fully automatic laminating machine. The previous 12u double-sided corona BOPP film was also automatically cut after paper lamination due to high static electricity and insufficient slipperiness of the film. There are defects such as continuous or irregular edges of the film and paper with 2cm remaining, ca...

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Problems solved by technology

[0003] With the advancement of modern technology, the hand-operated laminating machine has been gradually replaced by a fully automatic laminating machine. The previous 12u double-sided corona BOPP film was also automatically cut after paper lamination due to high static electricity and insufficient slipperiness of the film. Continuous or irregular film and paper end surface with residual 2cm defects, causing the customer's products to stick together and cannot be separated

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