Biodegradable Pressure-Sensitive Adhesive for Recyclable Paper Bonding
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Solution Overview
Problem
Existing adhesives used in paper recycling and paper-to-paper applications often contain non-biodegradable materials that contaminate recycled paper and are difficult to recycle, leading to environmental and economic challenges.
Innovation Solution
Development of biodegradable adhesives based on natural ingredients such as gelatin, glycerin, and vanilla extract, which can be used in various adhesive applications, including paper recycling and paper-to-paper bonding, providing recyclability and reducing contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If non-bio-based cold glues and petroleum-based adhesives are used, then strong bonding is achieved, but contamination in recycled paper increases and recyclability decreases
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive by using bio-based materials (corn syrup, gelatin, glycerin) instead of petroleum-based materials. This substitution maintains bonding strength while enabling biodegradation and eliminating contamination issues in recycled paper, directly resolving the contradiction between strong bonding and recyclability
Solution Approach 2:
The patent converts the previously harmful characteristic of non-biodegradable adhesives into a benefit by designing an adhesive that biodegrades completely. The adhesive components break down into natural substances that are harmless to paper recycling processes, transforming the contamination problem into an environmental benefit
2Reliability
If heated shipping is used for adhesive products, then adhesive performance is maintained, but energy consumption and costs increase
Solution Approach 1:
The patent changes the formulation parameters to include freeze/thaw stable ingredients (gelatin, glycerin, corn syrup) that maintain adhesive performance across a wide temperature range. This allows the adhesive to be shipped at ambient temperatures without heating, eliminating energy costs while maintaining reliability
3Ease of operation
If solvent-based clean-up is used for adhesive removal, then complete removal is achieved, but environmental harm and safety risks increase
Solution Approach 1:
The patent converts the need for harmful solvent-based clean-up into a benefit by designing an adhesive that cleans up easily with water. The bio-based components (corn syrup, gelatin, glycerin) are water-soluble and non-toxic, eliminating environmental harm and safety risks while maintaining ease of clean-up
Solution Approach 2:
The patent replaces expensive and hazardous solvent-based clean-up systems with inexpensive, safe water-based clean-up. This substitution uses a simple, abundant resource (water) to achieve complete adhesive removal without the need for specialized solvents or disposal procedures
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 biodegradable adhesives effectively reduce contamination in recycled paper and enhance recyclability, offering cost savings and environmental sustainability by being compostable and repulpable, while maintaining strong bonding properties.
Implementation Method 1
The adhesives are biodegradable and biobased. These adhesives allow the materials with which they are used to be recyclable, repulpable and/or compostable... contamination in recycled paper due to wax, plastic or petroleum adhesives (often referred to as stickies) can be reduced or eliminated when using the present adhesive because it biodegrades into the paper pulp
Implementation Method 2
These adhesives solve long held paper recycling mill-related problems connected with the use of non-bio-based cold glues & various forms of hot melt based adhesives... The adhesives listed below are suitable for use in all current permanent and non-permanent pressure sensitive adhesive applications
Data Source
AI summary
A biodegradable pressure sensitive adhesive includes:% (Parts)Water:15-37Defoamer:.000-1.0 Sodium Chloride (NaCl):.000-15.0Gelatin:14-26Glycerin/UREA: 6-18Vanilla Extract:.000-.700Sugar/Corn Syrup:22-42Preservative:.000-.7 TOTAL:100.00%and more particularly:% (Parts)Water:15-30Defoamer: .3-1.0Sodium Chloride (NaCl): 9-15.0Gelatin:15-26Glycerin: 6-16Vanilla Extract:.000-.250Sugar/Corn Syrup:24-40Preservative:.2-.6TOTAL:100.00%.