Laminates and packaging containers

JP7863299B2Active Publication Date: 2026-05-21DAI NIPPON PRINTING CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
DAI NIPPON PRINTING CO LTD
Filing Date
2024-08-26
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

When existing polyester film is replaced with stretched polyethylene film, the adhesiveness of the vapor-deposited film is insufficient, which makes the packaging containers prone to delamination during use and difficult to recycle and reuse.

Method used

By adjusting the density of the polyethylene resin layer and adding olefin-based elastomers, the adhesion between the vapor-deposited film and the stretched polyethylene film is improved, and the directional crystallization during the stretching process is controlled.

Benefits of technology

It significantly improves the adhesion between the vapor-deposited film and the stretched polyethylene film, prevents delamination, and enhances gas barrier properties, making it suitable for the manufacture of single-material packaging containers.

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Patent Text Reader

Abstract

To provide a laminate which is suitably usable for manufacturing a monomaterial packaging container, has high adhesion to a vapor-deposited film, can effectively prevent delamination when being formed into a packaging container, and has a high gas barrier property.SOLUTION: A laminate according to a first aspect includes at least a first sealant layer, a vapor-deposited film, a base material, a gas barrier layer, and a second sealant layer, wherein the base material includes a first polyethylene resin layer composed of a polyethylene resin having a density of 0.943 g / cm3 or less, the base material is subjected to drawing treatment, the vapor-deposited film is provided on the first polyethylene resin layer of the base material, and the first sealant layer and the second sealant layer are composed of a polyethylene resin.SELECTED DRAWING: Figure 1
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