In-Line Web Coating Layout for Recyclable Multilayer Packaging
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Solution Overview
Problem
The production of multi-layered materials, particularly flexible barrier packaging, is challenging due to the need for separate machines and processes, leading to increased complexity, cost, and reduced recyclability, especially when transitioning to monomaterials.
Innovation Solution
An in-line web material processing machine with integrated vacuum coating and extrusion units within a single vacuum chamber, allowing for continuous production of multi-layered materials with reduced handling and transportation steps, using the same material for the substrate and extrusion coating, and optionally including additional vacuum coating and printing units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate machines are used for vacuum coating and extrusion coating, then each process can be optimized independently, but the device complexity and production cost increase
Solution Approach 1:
The patent combines the vacuum coating unit and extrusion coating unit into a single integrated machine with a unified vacuum chamber. This merging eliminates the need for separate machines while maintaining the ability to optimize each coating process independently through dedicated control systems and process parameters for each unit.
2Ease of operation
If intermediate web material is wound up and unwound between processes, then handling and transportation are simplified, but production time is lost and contamination risk increases
Solution Approach 1:
The integrated machine enables continuous processing where the web material passes directly from the vacuum coating unit to the extrusion coating unit without interruption. The web material remains in motion throughout both coating processes, eliminating stopping, winding, and unwinding operations, thereby maintaining continuous productive action.
3Adaptability or versatility
If multiple separate processing machines are used, then process flexibility is maintained, but the number of handling steps and contamination risk increase
Solution Approach 1:
The patent utilizes a unified vacuum chamber that maintains an inert, contamination-free environment throughout the entire coating process. Both vacuum coating and extrusion coating occur within this controlled atmosphere, preventing contamination that would occur during transfer between separate machines while maintaining process flexibility through independent control of each coating unit.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies and economizes the production process, enhances material quality by minimizing contamination and mechanical damage, and facilitates recyclability by eliminating the need for lamination and adhesion, resulting in high-quality, easily recyclable monomaterials.
Implementation Method 1
a first vacuum coating unit (28) for depositing a film of a first coating material (40) on the web material (16)
Implementation Method 2
an extrusion coating unit (32) for extruding a film of an extrusion material (44) on the web material (16)
Data Source
Figure 1a~1b
Figure 2~3
AI summary
A web material processing machine (10) for producing a multi-layered material (12), especially a multi-layered packaging material (13), is presented. It comprises a first vacuum coating unit (28) for deposing a film of a first coating material on a web material (16) to be processed. Moreover, it is equipped with an extrusion coating unit (32) for extruding a film of an extrusion material on the web material (16). The extrusion coating unit (32) is positioned behind the first vacuum coating unit (28) with respect to a processing direction (20). Additionally, a method for producing a multi-layered web material (12) is explained. Furthermore, a multi-layered packaging material (13) is described.