Oriented Polymeric Film Wrapper with Perforated Starter Tab
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Solution Overview
Problem
Existing paper towel packaging is difficult to open as the poly wrapper has multiple layers, making it hard to puncture and tear, resulting in unpredictable and ragged openings.
Innovation Solution
A polymeric film wrapper with a molecular orientation direction and a starter tab featuring a line of weakness, such as perforations, allowing users to easily open the package by pulling in the molecular orientation direction, resulting in clean tears without additional scoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the poly wrapper is made with multiple layers for protection, then the packaging strength is improved, but the ease of opening deteriorates
Solution Approach 1:
The wrapper is segmented into multiple layers with different functions: outer layers provide strength and protection, while inner layers contain the line of weakness for easy opening. The line of weakness itself is segmented into a pattern that guides the tearing process, allowing the package to be opened cleanly despite the multi-layer construction.
2Ease of operation
If additional lines of perforations or scoring are added to enable easy opening, then the ease of opening is improved, but the device complexity increases
Solution Approach 1:
The line of weakness is extracted as a distinct feature within the wrapper structure, separated from the main body of the wrapper. This extracted line of weakness can be a different color, texture, or material property, making it visually distinct and easier to locate and tear without requiring complex additional structures.
3Ease of operation
If the wrapper is torn open manually, then the ease of opening is improved, but the manufacturing precision of the opening deteriorates
Solution Approach 1:
The line of weakness is pre-formed during manufacturing in a specific pattern and location. This preliminary action creates a predetermined tear path that guides the consumer's manual tearing action, ensuring that the opening is clean and precise without requiring the consumer to apply complex forces or techniques.
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
Enables easy and reliable opening of paper towel rolls and other products with clean, smooth tears, resembling cuts made by scissors or a razor blade, without the need for additional perforations or scoring.
Implementation Method 1
a polymeric film wrapper having a molecular orientation direction
Data Source
AI summary
A product, such as a roll of paper toweling, is wrapped in a polymeric film wrapper having a high degree of molecular orientation. The wrapper is provided with a small perforated starter tab, which a user can depress with their fingers or thumb to break the perforations. Upon breaking the perforations, the user can grasp the tab of the wrapper and thereafter open the package by pulling on the wrapper in the same direction as the molecular orientation direction of the wrapper. The high degree of molecular orientation allows the package to be cleanly torn open with very little effort.