Fiber-Web Tear-Open Scoring for Clean Edges and Package Integrity
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Solution Overview
Problem
Existing methods for producing tear-open aids in fiber-based web materials fail to provide a clean tearing edge and often result in the uncut portion of the material not following the scoring line when torn, leading to impermeable packaging integrity issues.
Innovation Solution
A method involving the formation of at least two scoring lines on opposite sides of the fiber-based web material, with each line severing the entire thickness of the material, and a third line between them, ensuring all transverse fibers are separated, allowing for a clean tear with minimal material subtraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If material is completely severed to form tear-open lines, then tearing is enabled, but packaging integrity and impermeability are compromised
Solution Approach 1:
The scoring lines are formed to a depth that partially severs the material (severing at least one fiber layer) but not completely through all layers. This partial action enables tearing guidance while preserving enough material continuity to maintain packaging integrity and impermeability.
2Manufacturing precision
If scoring lines are formed deep enough to sever all fiber layers, then clean tearing edge is achieved, but material stability and impermeability are lost
Solution Approach 1:
The scoring lines are applied with specific depth control to achieve different severance levels in different fiber layers. At least one fiber layer is completely severed to guide the tear, while other layers retain continuity to maintain overall material stability and impermeability.
3Ease of operation
If tear-open lines completely sever cardboard layers, then tearing is facilitated, but aroma and product leakage occur
Solution Approach 1:
The scoring lines are formed to partially sever the material structure - enough to enable tear guidance but not enough to create complete through-holes. This partial severance prevents aroma and product leakage while still facilitating tear-open functionality.
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
The method ensures a clean tearing edge while maintaining material stability and impermeability, preventing aroma or product leakage from packages.
Implementation Method 1
producing at least two scoring lines in at least one planar side of the fiber-based web material in such a way that the scoring line severs at least one fiber layer
Data Source
AI summary
The present invention relates to a method for producing a guided tear-open and/or tear-off aid for paper and/or other fiber-based web materials. The present invention is distinguished in that the material of the paper and/or other fiber-based web material for producing a scoring line is partially subtracted along the guided tear-open and/or tear-off aid to be produced thereon at least from one web side.