Ink Composition Adhesion Rigidity Contradiction
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Solution Overview
Problem
The challenge is to enhance the adhesiveness of an image layer to a print medium while ensuring the rigidity of the primer layer to prevent detachment due to curing-induced contraction, which existing ink compositions fail to adequately address.
Innovation Solution
An ink composition incorporating an adhesiveness providing component, such as acrylate monomers, and a rigidity providing component, including multi-functional acrylate monomers or oligomers, to improve adhesion and prevent layer breakage during curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rigidity of the primer layer is increased to prevent breakage during curing, then the layer strength is improved, but the adhesiveness to the print medium deteriorates
Solution Approach 1:
The patent applies parameter changes by carefully controlling the functional group composition ratios - specifically setting the acrylate group at 5-50 mass% and carboxyl group at 1-20 mass% of total functional groups. This quantitative parameter optimization allows the primer layer to achieve both high rigidity (through adequate crosslinking density from acrylate groups) and high adhesiveness (through sufficient carboxyl groups that form strong bonds with metal substrates), thereby resolving the contradiction between strength and adhesiveness.
Solution Approach 2:
The patent employs composite material principles by creating a primer layer with a dual-functional group composition (acrylate + carboxyl). The acrylate groups provide rigidity through crosslinking network formation, while carboxyl groups enhance adhesiveness through chemical bonding with metal surfaces. This functional composite approach allows simultaneous achievement of both rigidity and adhesiveness that cannot be obtained with single-functional materials.
2Reliability
If the adhesiveness between primer layer and print medium is improved, then the bonding strength is enhanced, but the rigidity of the primer layer deteriorates
Solution Approach 1:
The patent resolves this contradiction through precise parameter control of functional group ratios. By setting acrylate groups at 5-50 mass% and carboxyl groups at 1-20 mass% of total functional groups, the formulation achieves optimal balance: sufficient carboxyl groups ensure strong adhesiveness to metal substrates, while adequate acrylate groups maintain primer layer rigidity through crosslinking, preventing the rigidity deterioration that would normally accompany enhanced adhesiveness.
Solution Approach 2:
The dual-functional group composite (acrylate + carboxyl) enables simultaneous optimization of both adhesiveness and rigidity. Carboxyl groups specifically target adhesiveness enhancement through metal substrate bonding, while acrylate groups maintain structural rigidity through crosslinking. This composite functional approach allows both properties to be enhanced without the trade-off that would occur with single-functional systems.
3Strength
If multi-functional acrylate monomers and oligomers are added to improve rigidity, then the layer rigidity is enhanced, but the adhesiveness to print medium deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the ratio of multi-functional acrylate components to other functional groups. By limiting multi-functional acrylate monomers and oligomers to specific ranges (5-50 mass% acrylate groups, 1-20 mass% carboxyl groups), the formulation achieves optimal balance where multi-functional components provide necessary rigidity through crosslinking without excessive amounts that would compromise adhesiveness. This quantitative control resolves the contradiction between rigidity enhancement and adhesiveness maintenance.
Solution Approach 2:
The patent uses composite material principles by combining multi-functional acrylate components (for rigidity) with carboxyl-containing components (for adhesiveness) in specific proportions. The multi-functional acrylates create the crosslinked rigid network structure, while the carboxyl groups ensure strong bonding to metal substrates. This composite formulation approach allows rigidity enhancement through multi-functional components without the adhesiveness deterioration that would normally result from such components.
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 ink composition achieves improved adhesiveness of the image layer to various print media, including metal and glass, by enhancing the adhesion properties and maintaining the primer layer's rigidity, thereby preventing detachment.
Implementation Method 1
an ink composition... an adhesiveness providing component containing an acrylate monomer... a rigidity providing component... makes the layer more rigid than when the ink composition does not contain the rigidity providing component
Data Source
Figure 1(a)~1(f)
AI summary
An ink composition according to the present invention contains an adhesiveness providing component for providing an adhesiveness with respect to a print medium, and a rigidity providing component.