Non-polar high polymer film laser moulding method and non-polar high polymer film integral machine for laser processing

Abstract

The invention discloses a non-polar high polymer film laser moulding method characterized as: laser moulding, corona treatment, then forced cooling for the non-polar high polymer film, then recoiling and aluminization. The method can effectively reduces deflection and distortion of laser pattern during corona treatment of non-polar high polymer laser film; the film surface diminishes volatile ingredient, while surface dyne value keeps long, which shortens stop time of half-product in conversion process, reduces operation difficulty of worker, substantially improves qualified rate of finished product and bring positive influence to combination of late period and printing procedure.

Description

technical field [0001] The invention relates to a non-polar polymer film laser molding process and a corona treatment machine. Background technique [0002] During the processing of non-polar laser film, the procedure of "molding + corona → rewinding → aluminum plating → slitting (inspection)" is generally selected. That is, during the molding process, the surface dyne value of the laser film is increased by increasing the corona to meet the needs of post-printing processing. When the non-polar laser polymer film undergoes corona treatment, the discharge electrode of the corona machine impacts the surface of the film with an arc with a voltage of 10,000-20,000 volts and a frequency of 20,000 Hz to 25,000 Hz, causing the high-fraction chain to break (the surface layer is the most serious), A lot of free radicals are produced, and at the same time, due to the action of electromagnetic waves, the activities of polymer chains and other molecules are accelerated, polymer chains ...

AI Technical Summary

Problems solved by technology

When the non-polar laser polymer film undergoes corona treatment, the discharge electrode of the corona machine impacts the surface of the film with an arc with a voltage of 10,000-20,000 volts and a frequency of 20,000 Hz to 25,000 Hz, causing the high-fraction chain to break (the surface layer is the most serious), A lot of free radicals are produced, and at the same time, due to the action of electromagnetic waves, the activities of polymer chains and other molecules are accelerated, polymer chains and other molecules are rearranged, and some free radicals and polar groups are recombined. Most of the film is biaxially stretched during the production process. Therefore, after the arc shock and electromagnetic waves, the non-polar polymer film will shrink and deform in both the warp direction and the weft direction. The effect of tension control is small, and the weft direction is not affected by any external force, so the deformation is large. The result is uneven light and shade and migration of the pattern of the laser film. At the same time, due to the characteristics of creep and stress relaxation of polymers, during the parking process after the film is wound, the film will continue to shrink in the warp and weft direction, and the laser pattern will also migrate.

When the film is subjected to corona, it will often cause deformation of the film itself, uneven light and shade and migration of the transferred laser pattern, and serious quality defects such as violent tendons, left and right loose edges, and pockets will appear after aluminum plating.

Images