Pseudo-Plastic Adhesive for Corrugated Board
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Solution Overview
Problem
Existing adhesive compositions for corrugated board manufacturing face issues with deformation and energy consumption due to high water penetration, and the addition of fillers like calcium carbonate is expensive and causes equipment clogging.
Innovation Solution
An adhesive composition with pseudo-plastic additives, such as homopolymers or copolymers of acrylic acid, that decrease viscosity under shear forces for minimal application and instantly increase viscosity for strong adhesion, reducing water penetration and energy requirements, while maintaining low concentrations to avoid affecting solids content and gelling properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If adhesive composition with high solids content is used, then water content is reduced and deformation is minimized, but viscosity becomes too high for proper application
Solution Approach 1:
The patent modifies the rheological parameters of the adhesive by adding pseudo-plastic additives that change the viscosity characteristics. These additives enable the adhesive to maintain high solids content while achieving appropriate application viscosity through shear-thinning behavior, where viscosity decreases under shear stress during application and increases at rest for proper adhesion.
2Reliability
If adhesive is applied with sufficient water content for good adhesion, then adhesion is improved, but energy consumption for evaporation increases
Solution Approach 1:
The patent optimizes the water content parameter within a specific range (40-70% by weight) and uses pseudo-plastic additives to maintain proper rheology. This allows achieving good adhesion with minimal water content, thereby reducing the energy required for water evaporation during the drying process while maintaining bonding reliability.
3Reliability
If adhesive penetrates deeply into the paper board, then adhesion is improved, but deformation of the paper board increases
Solution Approach 1:
The patent controls the penetration depth by optimizing adhesive composition parameters including solids content, water content, and adding pseudo-plastic additives. These modifications create an adhesive that achieves sufficient adhesion through controlled surface bonding rather than deep penetration, thereby preventing deformation of the paper board structure.
4Quantity of substance
If filler like calcium carbonate is added to increase solids content, then dry solids content increases, but processing equipment clogging occurs
Solution Approach 1:
The patent replaces expensive and problematic fillers like calcium carbonate with pseudo-plastic additives that are effective at very low concentrations (0.01-5% by weight). These additives increase solids content without causing equipment clogging, as they remain in solution and do not form precipitates or deposits in processing equipment.
5Reliability
If biodegradable soap and sequestering agents are used to increase viscosity and improve wettability, then adhesion is improved, but adhesive penetration into paper increases causing deformation
Solution Approach 1:
The patent achieves improved adhesion through optimized composition parameters (solids content, water content, pH control) and pseudo-plastic additives rather than using biodegradable soaps and sequestering agents. This approach improves wettability and adhesion without the excessive penetration and deformation caused by those conventional additives.
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 adhesive composition minimizes deformation risk, reduces energy consumption, and allows for improved adhesion and printability, with the ability to recycle unused adhesive and maintain strength without cracking, suitable for various corrugated board types and coatings.
Implementation Method 1
An adhesive composition with pseudo-plastic additives, such as homopolymers or copolymers of acrylic acid, that decrease viscosity under shear forces for minimal application
Implementation Method 2
its viscosity is sufficiently low, but that after application the viscosity rapidly increases due to gelatinisation of the starch upon heating
Implementation Method 3
reducing water penetration and energy requirements
Data Source
AI summary
An adhesive composition comprisinghaving an amount of an adhesive, and an amount of an additive which is selected from the group of homopolymers of acrylic acid, copolymers of acrylic acid and, polyacrylates, polyurethanes, cellulose thickening agent, natural or synthetic gum, natural or synthetic resin, silica or an inorganic mineral having a layered structure.