In-mold label material and preparation method thereof as well as in-mold label and packaging container

Abstract

The invention discloses an in-mold label material, an in-mold label, a preparation method thereof and a packaging container. The in-mold label material includes a substrate layer, the substrate layer includes an upper surface and a lower surface, and also includes an EVA layer as a heat-sealing layer; the upper surface of the substrate layer is provided with an adhesive and an antistatic agent. The first mixed layer of the mixed solution, the lower surface of the substrate layer is provided with the second mixed layer of the mixed solution comprising the adhesive and the antistatic agent; the EVA layer as the heat-sealing layer is coated on the second mixed layer. The containers include in-mold labels and plastic containers cut from the in-mold label material of the present invention. The invention can realize the replacement of the existing in-mold label base layer material and plastic container material, and meets the diversified and individualized requirements of the in-mold label.

Description

technical field [0001] The invention relates to the technical field of label materials / labels and processing thereof, in particular to an in-mold label material, an in-mold label, a preparation method thereof, and a packaging container. Background technique [0002] In-mold labels are the labels with printed trademark images, which are picked up one by one by the robot, positioned and placed in the opened mold, and the labels are firmly adsorbed on the mold wall by vacuum negative pressure or electrostatic adsorption; After the mold is closed, the molten plastic enters the mold and is formed. Due to the temperature of the molten plastic, the heat-sealing layer (solid adhesive) of the in-mold label is melted and integrated with the plastic container; when the mold is opened again, the plastic container is formed, The label and container are integrated and become part of the formed container to form a complete packaging container. In-mold labeling and its labeling technology ...

AI Technical Summary

Problems solved by technology

[0003] In-mold labels have developed rapidly abroad, such as in Europe, North America, the United States, France, Japan and Taiwan, China, because of the development of plastic molded products for more than 40 years, the in-mold label materials and labeling process The development has been popular for 30 years; while the development of molding and in-mold labels in China has been less than 20 years, the in-mold label materials and their labeling technology are far behind these developed countries; especially the preparation technology of in-mold label materials and their intellectual property rights It is almost monopolized by developed countries and has formed technical barriers, which has caused the development of the raw material supply industry of this new technology to lag behind and the development of its suppliers to be unbalanced

Due to the influence of materials and extrusion and co-extrusion processes, the existing in-mold label films have the following problems: ① Since the thickness of each layer is adjusted by the speed of the extruder of each layer, the thickness of each layer is not easy to control, And the co-extruded film is easy to produce mixed materials, which affects the quality and appearance of the label and the container; ②The in-mold label materials that can be used for extrusion or co-extrusion are limited to extruded films composed of various thermoplastic film layers, If a film containing other non-thermoplastic layers is required, such as aluminum-plastic or metal laser materials, the current technology and process cannot be realized, thus limiting the diversity of labels; ③The existing in-mold labels use polypropylene (PP) as the base Material layer, with low-density polyethylene and high-density polyethylene as the heat-sealing layer, on the one hand, it limits the use of substrate layer materials, and on the other hand, it also limits the use of packaging container materials; ④ According to the high-tech strategic plan The core content of Industry 4.0 and Made in China 2025, its intelligent manufacturing, fast, effective and personalized product supply will be an important feature, so the current in-mold label materials obviously cannot meet the personalized requirements of decoration and label function diversification; ⑤In-mold labeling materials and their labeling technology are almost monopolized by developed countries and form patent technical barriers. Therefore, research on in-mold labeling materials and new technologies for their preparation, intelligent, diversified and personalized manufacturing of in-mold labeling products is China's In-mold label industry urgent task

Images