Heat-shrinkable thin film and preparation method thereof

Abstract

The invention relates to a heat-shrinkable packing material, in particular to a heat-shrinkable thin film and a preparation method thereof. The heat-shrinkable thin film structurally comprises a base material layer, a printing layer, a local composite glue layer and a local unshrinking aluminized film layer from outside to inside. The preparation method of the heat-shrinkable thin film comprises the following steps of S10, providing base material; S20, printing images and texts on the inner surface of the base material, and forming the printing layer; S30, locally printing composite glue at the position on the inner surface of the base material which is in need of metal color; S40, providing an unshrinking aluminized film; S50, compositing; S60, die cutting the position which is in need of the metal color; and S70, recovering waste materials. According to the heat-shrinkable thin film and the preparation method thereof, provided by the invention, the metal color cannot disappear after the heat shrinking.

Description

technical field [0001] The invention relates to heat-shrinkable packaging materials, in particular to a heat-shrinkable film and a preparation method thereof. Background technique [0002] In order to obtain a metallic effect on the packaging, methods such as hot stamping, cold stamping, aluminum plating, and aluminum washing are often used to obtain partial metal patterns on the packaging materials. [0003] As disclosed in Chinese patent document CN101733776A on June 16, 2010, a stamping machine bronzing structure includes an upper mold base of the punching machine, the lower part of the upper mold base is connected to the upper template through the upper mold fixing plate, and the upper mold fixing plate A heat insulating board and a heating plate are arranged sequentially between the upper mold plate and the upper mold plate; the feature is that the contact surface between the heat insulating plate and the upper mold fixing plate has a heat dissipation groove. Hot stamp...

AI Technical Summary

Problems solved by technology

[0006] Although the aforementioned metallization effect packaging technology has been industrialized and has achieved corresponding technical effects, however, its metallization effect is still not perfect, and there is a lot of room for improvement

Especially when heat-shrinkable film is used, the metallization effect layer set by bronzing, aluminum plating, aluminum washing, etc. will be heat-shrunk, and the metal color will be dull, which will affect the display of metallization effect

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