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In-mold label, preparation method thereof and mold

An in-mold label and coating layer technology, applied in the field of packaging, can solve the problems of high temperature, production energy consumption and high cost, and achieve the effect of reducing energy consumption, reducing production cost and excellent low temperature heat sealing performance

Pending Publication Date: 2021-11-05
MATSUMOTO COATING TECH KUNSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing in-mold labeling technology often requires a higher temperature, and the label set in the film is pasted to the bottom of the bottle by melting, and the production energy consumption and cost are high.

Method used

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  • In-mold label, preparation method thereof and mold
  • In-mold label, preparation method thereof and mold

Examples

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preparation example Construction

[0040] A second aspect of the present invention provides a method for preparing an in-mold label as described above, which includes the following steps:

[0041] (1) Corona treatment is carried out on the substrate surface, and the roughness Ra of the substrate surface after corona treatment is 0.2~0.6 μm;

[0042] (2) the base material after the above-mentioned corona treatment adopts reverse coating process to carry out the coating of primer agent to obtain primer layer;

[0043] (3) setting the coating layer on the surface of the primer layer through coating process, and then post-processing.

[0044] In some preferred embodiments, the coating process adopts double-layer co-extrusion coating; the extrusion temperature of the upper film layer is 180-320°C, and the extrusion temperature of the lower film layer is 240-330°C; Extrusion composite pressure is 70 ~ 80kg / cm.

[0045] Further preferably, in step (1), the surface of the base material is frosted, and the roughness R...

Embodiment 1

[0053] This embodiment provides an in-mold label, which includes a coating layer and a substrate layer; the coating layer is bonded to the substrate layer through a primer layer; the coating layer is stacked by two layers The structural composition includes an upper film layer away from the undercoat layer and a lower film layer in contact with the undercoat layer.

[0054]The raw materials for preparing the upper film layer include 5 parts of LLDPE, 89 parts of EVA, 5 parts of polyethylene wax and 1 part of auxiliary agent in parts by weight. Described auxiliary agent is that antistatic agent is PELESTAT300 (its melt index is 30g / 10min) that antistatic agent is formed by Sanyo, and described LLDPE is China Taiwan plastic LLDPE3840 product (its density is 0.938g / cm 3 , melt index is 5g / 10min), and described EVA is the EV302 (its density is 0.930g / cm 3 , melt index is 3g / 10min, VA content is 8wt%), described polyethylene wax is the polyethylene wax BLL-1 of Shandong Baolilai P...

Embodiment 2

[0062] This embodiment provides an in-mold label, which includes a coating layer and a substrate layer; the coating layer is bonded to the substrate layer through a primer layer; the coating layer is stacked by two layers The structural composition includes an upper film layer away from the undercoat layer and a lower film layer in contact with the undercoat layer.

[0063] The raw materials for preparing the upper film layer include 5 parts of HDPE, 89 parts of EVA, 5 parts of polyethylene wax and 1 part of auxiliary agent in parts by weight. Described auxiliary agent is that antistatic agent is the PELESTAT300 (its melt index is 30g / 10min) that Sanyo chemically becomes, and described HDPE is China Taiwan plastic HDPE9001 (its density is 0.950 g / cm 3 , melt index is 0.05g / 10min), and described EVA is EV302 (its density is 0.930 g / cm 3 , melt index is 3g / 10min, VA content is 8wt%), described polyethylene wax is the polyethylene wax BLL-1 of Shandong Baolilai Plastic Auxiliary...

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Abstract

The invention relates to the technical field of packaging, in particular to an in-mold label, a preparation method thereof and a mold. The in-mold label comprises a laminated film layer and a base material layer; the laminated layer is bonded with the base material layer through a bottom coating; and the laminated layer is composed of two layers of structures which are arranged in a stacked mode and comprises an upper film layer deviating from the bottom coating layer and a lower film layer making contact with the bottom coating layer. When the in-mold label is used, no extra adhesive or other components are needed, the good bonding effect can be achieved through the interaction between the film spraying layer and the in-mold label, and the label is bonded to a bottle body. In addition, the in-mold label has excellent low-temperature heat sealing performance, the surface of the in-film label can be pasted to a bottle body at a lower temperature (such as 105 DEG C), and compared with a traditional label (the pasting temperature exceeds 110 DEG C), the in-mold label has the advantages that energy consumption is greatly reduced, and the production cost is reduced.

Description

technical field [0001] The present application relates to the field of packaging technology, in particular to an in-mold label, its preparation method, and a mold. Background technique [0002] In blow molding manufacturing, the process of pasting the label on the inner surface of the metal mold, followed by mold closing and blow molding, and adhering the label to the surface of the container is called the in-mold labeling process. Compared with the traditional process of re-labeling after manufacture, the in-mold labeling process has higher production efficiency and yield, and can greatly reduce the management cost and labor cost of the enterprise. However, the existing in-mold labeling technology often requires higher temperature, and the label set in the film is glued to the bottom of the bottle by melting, and the production energy consumption and cost are high. Contents of the invention [0003] In view of the above technical problems, the first aspect of the present...

Claims

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Application Information

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IPC IPC(8): G09F3/02G09F3/10C08L23/06C08L23/08B29C48/00B29C48/08B29C48/154
CPCG09F3/02G09F3/10C08L23/0853C08L23/06B29C48/002B29C48/08B29C48/154G09F2003/0257C08L2205/03C08L2207/062C08L23/0815
Inventor 孙守文代明水
Owner MATSUMOTO COATING TECH KUNSHAN CO LTD
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