Segmented Adhesive Bonding for Separable Packaging Layers
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Solution Overview
Problem
Current packaging materials with superimposed layers are unable to balance the need for adhesion during automated production with the requirement for easy separate disposal, often resulting in costly and complex separation processes, leading to non-separated disposal in landfills or incinerators.
Innovation Solution
A material composed of superimposed cellulose and synthetic layers connected by interposed adhesive in mutually spaced bonding regions, allowing sufficient adhesion for automated processing while enabling easy manual separation for distinct disposal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the layers are stably anchored to each other, then the material can be used in automated production lines without separation, but the layers become difficult to separate for disposal
Solution Approach 1:
The adhesive bonding is segmented into discrete mutually spaced regions rather than continuous bonding, creating localized bond points that maintain structural integrity during handling while allowing separation at non-bonded areas for disposal
Solution Approach 2:
Different regions of the material have different bonding characteristics - bonded regions provide strength and stability during production, while non-bonded regions allow for easy separation and disposal, creating local quality variations in adhesion properties
2Reliability
If continuous adhesive bonding is used, then layer stability is improved, but adhesive consumption and cost increase
Solution Approach 1:
The adhesive application is segmented into discrete mutually spaced regions along the material width, significantly reducing the total volume of adhesive required compared to continuous bonding while maintaining sufficient layer stability through strategic placement of bond points
Solution Approach 2:
Instead of applying adhesive across the entire surface (excessive action), adhesive is applied only in specific spaced regions (partial action), providing just enough bonding to maintain stability during production without the excess adhesive consumption and associated costs
3Strength
If full adhesive coverage is applied, then bonding strength is maximized, but air bubble formation between layers increases
Solution Approach 1:
By segmenting the adhesive application into discrete spaced regions, air can be channeled and evacuated through the non-bonded gaps between adhesive regions, preventing air bubble entrapment that would occur with continuous adhesive coverage while maintaining bonding strength at the applied locations
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 the use of packaging materials in automated lines with adequate protection and aesthetic presentation, while allowing for simple and cost-effective separate disposal of layers, reducing adhesive usage by over 50% and preventing air bubble issues.
Implementation Method 1
the first layer and second layer are connected to each other by means of an adhesive which is interposed between said two layers and is arranged in mutually spaced adhesive bonding regions
Data Source
AI summary
A material includes superimposed layers which are mutually anchored and separable, particularly for manufacturing, on automated lines, packages, bags, envelopes, containers or the like. The material according to the invention comprises at least one first layer made of cellulose material and at least one second layer made of synthetic material. The first layer and the second layer are connected to each other by an adhesive which is interposed between the two layers and is arranged in mutually spaced adhesive bonding regions.