Multi-layer Packaging Tape with Adhesive Channels for Recyclability
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Solution Overview
Problem
Existing multi-layer tapes for packaging face challenges in selective waste collection due to non-separable materials and poor breathability, leading to inefficient recycling and preservation of products.
Innovation Solution
A multi-layer tape design featuring an adhesive layer with continuous longitudinal channels and perforations, allowing easy separation and breathability by enabling gas exchange between layers, while maintaining adhesion during use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an adhesive layer is applied between two layers to hold them together, then the layers remain attached during normal use, but the materials become difficult to separate for recycling
Solution Approach 1:
The adhesive layer is segmented into discrete adhesive dots or strips spaced at regular intervals, rather than forming a continuous layer. This segmentation allows the layers to remain attached at the adhesive points during normal use, while enabling easy separation by pulling along the non-adhesive spaces between the dots or strips, thus resolving the contradiction between strong adhesion and recyclability
Solution Approach 2:
The continuous adhesive layer is extracted and replaced with discontinuous adhesive elements (dots or strips). This extraction removes the harmful continuous bonding that prevents recycling, while retaining sufficient adhesive functionality at the spaced intervals to maintain package integrity during use
2Reliability
If air-proof materials are used for packaging layers, then product preservation is improved, but breathability is reduced
Solution Approach 1:
The packaging structure incorporates localized breathable elements (perforations, microporous sections, or breathable adhesive zones) within the otherwise air-proof material. This local quality approach allows gas exchange at specific locations while maintaining the overall protective barrier function of the packaging, thus simultaneously achieving product preservation and breathability
3Adaptability or versatility
If a transparent window is added to multi-layer tape, then visual appeal and sales are improved, but manufacturing complexity increases
Solution Approach 1:
The transparent window feature is merged with one of the existing packaging layers, making that layer both structural and transparent. This integration eliminates the need for separate window components or complex assembly steps, achieving the visual appeal function while minimizing increases in manufacturing complexity
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
Facilitates easy recycling and maintains product freshness by allowing gas exchange, extending shelf life and simplifying the separation of materials for waste collection.
Implementation Method 1
an adhesive layer sandwiched between said first layer and said second layer, said adhesive layer being capable of holding together the first layer and the second layer during normal use of the tape as packaging
Implementation Method 2
at least one of said first and second layers has perforations at least at the channels
Implementation Method 3
allowing gas exchange between layers
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
A multi-layer tape (11), particularly for packaging food products, comprising: at least a first layer (13) made of a first material; at least a second layer (15) made of a second material, wherein said second material can be the same as the first material or a different material; an adhesive layer (17) sandwiched between said first layer (13) and said second layer (15), said adhesive layer (17) being capable of holding together the first layer (13) and the second layer (15) during normal use of the tape as packaging, while allowing, where appropriate, to separate said layers substantially without tearing the material of the first layer (13) and second layer (15), wherein the adhesive layer (17) defines, between said first layer (13) and said second layer (15), a plurality of continuous longitudinal channels (19).