Shrinking-proof polyethylene terephthalate (PET) laser transfer base film and method for preparing same

Abstract

The invention discloses a shrinking-proof PET laser transfer base film and a method for preparing the same. The weight ratio of components of raw materials of layer A, layer B and layer C are as follows: layer A: 75% of polyester used for films, 25% of a caking inhibiter; layer B: 85% of film polyester, 15% of a thermal stability caking inhibiter; and layer C: 80% of film polyester, 20% of the caking inhibiter. The method for preparing the shrinking-proof PET laser transfer basement film comprises the steps of cutting materials into pieces and mixing the materials; performing fusion and extrusion; performing die head piece casting; drawing longitudinally; drawing transversely; performing traction and side shearing; winding; slitting and finishing products. Compared with conventional laser transfer base films, the shrinking-proof PET laser transfer base film has the advantages that the shrinking-proof performance is excellent, the thermal stability is good, the stamping effect is good, the transfer is complete, and the thickness is uniform. The shrinking-proof PET laser transfer base film can meet requirements of users for production of high-end positioning laser transfer base films and is applicable to manufacture of laser transfer aluminum plating packaging materials which have certain anti-counterfeiting functions.

Description

technical field [0001] The invention relates to a three-layer co-extruded biaxially stretched PET base film and a preparation method thereof, in particular to an anti-shrinkage PET laser transfer base film and a preparation method thereof. Background technique [0002] In recent years, the domestic market has a great demand for high-grade laser transfer base film. Usually, the laser transfer base film produced by ordinary PET and PP raw materials is embossed, evaporated and laser transferred to decorate and decorate the packaged goods, so as to realize the anti-counterfeiting function. The laser transfer base film produced by ordinary PET raw materials has high requirements for its production process and equipment performance, and the quality of the produced products cannot fully meet the requirements of users, such as the production of laser transfer film for high-end cigarette packs. The registration accuracy deviation of the printed pattern is required to be ≤0.3mm, whil...

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Problems solved by technology

The laser transfer base film produced by ordinary PET raw materials has high requirements for its production process and equipment performance, and the quality of the produced products cannot fully meet the requirements of users, such as the production of laser transfer film for high-end cigarette packs. The registration accuracy deviation of the printed pattern is required to be ≤0.3mm, while most of the domestically produced PET laser transfer film generally has a thermal shrinkage rate between 0.1-0.5%, resulting in a low product qualification rate, and some seams will be formed on the surface of the laser transfer film. This will not only bring a lot of inconvenience to downstream users for subsequent production and processing, but also lead to an increase in the waste rate of cigarette packs, a waste of a lot of raw and auxiliary materials, resulting in increased production costs, which in turn will affect the wide application of PET laser transfer film products

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