A cold-stamped composite aluminum film

By incorporating mechanical locking and tear-resistant textures into the composite aluminum film, the problem of insufficient interlayer bonding strength and tear resistance in traditional composite aluminum films is solved, achieving high-strength interlayer bonding and tear resistance, making it suitable for pharmaceutical, food packaging, and new energy battery encapsulation.

CN224426788UActive Publication Date: 2026-06-30SUZHOU HAISHUN PACKAGING MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SUZHOU HAISHUN PACKAGING MATERIAL
Filing Date
2025-06-19
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Traditional composite aluminum films have insufficient interlayer bonding strength, tear resistance, and adhesive strength, leading to delamination, crack propagation, and aluminum film detachment, which cannot meet the stringent requirements of pharmaceutical, food packaging, and new energy battery encapsulation.

Method used

The AL film, PA film and PVC film are laminated with uniformly distributed adhesive. Mechanical interlocking textures are set on the surface of the AL film, PA film and PVC film, and tear-resistant textures are set on the outer surface of the PA film and PVC film, forming a tenon-and-mortise mechanical interlocking structure and a mesh-like tear-resistant structure, which enhances the interlayer bonding and tear resistance.

Benefits of technology

It significantly improves interlayer bonding strength and tear resistance, prevents delamination and crack propagation, enhances packaging sealing and adhesion stability, and is suitable for pharmaceutical, food packaging and new energy battery encapsulation with high barrier performance requirements.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention provides a cold-stamped composite aluminum film, comprising an AL film, a uniformly distributed adhesive, a PA film, a PVC film, tear-resistant patterns, and mechanical locking patterns. The AL film, PA film, and PVC film are bonded together by the uniformly distributed adhesive. Both the PA film and PVC film have integrally formed tear-resistant patterns and mechanical locking patterns, with the AL film having integrally formed mechanical locking patterns. This invention increases the contact area and mechanical locking mechanism by incorporating mechanical locking patterns into the AL film, PA film, and PVC film, thereby enhancing interlayer bonding strength and improving packaging sealing. The mesh-like tear-resistant patterns on the outer surfaces of the PA film and PVC film disperse stress to prevent crack propagation and also improve adhesion strength to objects, making it suitable for pharmaceuticals, new energy, and other fields.
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