Casted web for flexible tube container with longitudinal side seam

EP4577403A1Pending Publication Date: 2025-07-02KIM PACK CO LTD
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Patent Information

Application Number
EP2023857839
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-08-25
Filing Date
2023-08-23
Publication Date
2025-07-02

AI Technical Summary

Technical Problem

Conventional methods for producing longitudinal side seam tube containers are multi-step processes that do not efficiently provide a one-step casted tube with excellent oxygen and water vapor barrier properties, leading to longer lead times and suboptimal mechanical properties.

Method used

A multi-layered casted laminate tube container is developed using a core layer with an oxygen barrier material like ethylene vinyl alcohol, combined with tie layers and outer layers of polyolefin-based materials, produced through an extrusion cast process, which includes a corona treatment for enhanced adhesion and properties.

Benefits of technology

This approach reduces production time from 30 days to 15 days, providing a flexible tube container with improved mechanical properties, stiffness, and barrier performance, while maintaining comparable properties to traditional laminated webs.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

One-step multilayer non-laminated tube with longitudinal side seam useful in packaging applications and having a combination of oxygen barrier characteristics, and bounce back property, includes a core layer having an oxygen barrier material such as ethylene vinyl alcohol. A composition of the invention comprising a layer structure to obtain a one-step casted web for making longitudinal side seam tube is disclosed
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