Preparation method of laser film with character holography

Abstract

The invention discloses a preparation method of a laser film with character holography. The preparation method comprises the following steps of: (1) preparing a resin coating; (2) applying a layer ofresin coating onto the surface of a PET base film to prepare a coating layer; (3) printing character information on the coating layer to obtain a character layer; (4) conducting film pressing processing on the character layer with a seamless laser film used as a template, copying holography to the character layer of the PET base film, the film pressing temperature ranging from 90 DEG C to 100 DEGC, and the film pressing speed ranging from 65 m / min to 80 m / min; and (5) plating a dielectric layer on the pressed PET base film in vacuum. The film pressure temperature is low, deformation is smallwhen the base film is pressed, so that the fastness and definition of the base film are improved, and the yield is increased; a film pressing machine is high in speed, so that a production period is shortened; the seamless film pressing plate is adopted, the pressure of a pressing roller is proper during film pressing, a film surface is clean, and a holographic effect is good; the prepared plate-seam-free laser film with character holography is uniform and attractive in appearance and free of plate seams.

Description

technical field [0001] The invention relates to a method for preparing a laser film, in particular to a method for preparing a seamless laser film with text holography. Background technique [0002] With the wide application of laser film in packaging materials in the fields of tobacco and alcohol, food, medicine and cosmetics, laser film is divided into slit laser film with text hologram and seamless laser film with plain surface and other effects. The main process of the laser film with text holography is to use the film plate to directly press the information on the base film and then coat the corresponding medium. The film plate is wrapped on the surface of the steel roller by a flat nickel plate, so that the nickel plate is stitched together. There will be a seam at the place, resulting in the final pressed laser film also has a corresponding seam. The seamless laser film of the plain surface or light column adopts the second film pressing. After the normal film is pre...

AI Technical Summary

Problems solved by technology

[0003] On the one hand, the slit laser film with text holography always has an obvious slit, which greatly affects the appearance

The seamless laser film with plain surface and other effects adopts the secondary film pressing process, which is only suitable for the plain surface or light column laser film with the same or similar information effect. The laser film with no obvious difference in the secondary superposition is not suitable for the laser film with text holography.

[0004] On the other hand, the normal film pressing process uses a nickel plate as a template for pressing, and the temperature during the film pressing process is too high at about 150°C, so the pressed base film is easy to deform or wrinkle; the speed of the traditional film pressing machine is too slow, Generally 45m / min, which seriously affects the production efficiency; moreover, the production process of the nickel plate is complicated, the quality requirements are very strict, and the manufacturing cost is high

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