Slitting method of double-sided acrylic coated film

Abstract

The invention provides a slitting method of a two-sided crylic acid coating film. The slitting method comprises the following steps of: correctly loading a two-sided crylic acid coating film to be slit on an unreeling shaft and then inflating air and well fixing, stringing the film to a reeling shaft by a guide roll, and setting specific unreeling tension, reeling tension, weight of a pressure roll at the reeling part and drawing-up speed according to the roll film width of the double-sided crylic acid coating film; and starting up, pressing an acceleration button to reach a set drawing-up speed, beginning to reduce speed till the film on the unreeling shaft to run by about 100m remaining, pressing a stop button after the film runs out, and labeling the roll film. The end surface of the roll film of the slit coating film is flat and even (the width difference is + / -0.2mm), and no adhesion problem is caused after the two-sided crylic acid coating film is placed for 6 months.

Description

technical field [0001] The invention relates to a method for cutting a double-sided acrylic coating film, which belongs to the technical field of organic polymer film processing. Background technique [0002] In the packaging industry, as people pay more and more attention to the aesthetic requirements of various packaging, acrylic coatings are widely used in food and cigarette packaging because of their advantages such as high gloss and good printing adaptability. When acrylic paint is used for cigarette packaging, it is mostly necessary to coat acrylic on both sides, and most of them need to be cut into roll films with a width of 340-350mm, and because the molecular chain of acrylic acid contains a large number of carboxyl groups and other highly active groups, resulting in Double-sided acrylic coated film rolls are prone to sticking and cannot be used, so the requirements for the entire processing process are very strict. [0003] Patent CN201220009872 relates to a wide-...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that rolls of double-sided acrylic coated films are prone to sticking, the invention provides a method for cutting double-sided acrylic coated films, which can be used to control the quality of double-sided acrylic rolls, and adjust according to different roll width Unwinding tension and winding tension (if the tension control is too small, the film roll will loosen or slip on the bottom roller, causing wrinkles; if the tension control is too large, it will cause the internal adhesion of the film roll and affect the product quality). Speed ​​(too slow or too fast will cause film sticking), especially the adjustment of the weight of the pressure roller at the winding position, which is a parameter condition that is easily ignored in the conventional slitting process. When the weight of the pressure roller is too heavy, it will cause the roll Cohesion occurs when the film is too tightly wound, while the weight of the pressure roller is too light, which will cause wave edges (that is, the edge of the film is warped and uneven) when the film is too loose, which will affect the subsequent application

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