Banknote Two-Layer Antiviral Coating Cost Reduction
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Solution Overview
Problem
The production of banknotes with antiviral protective coatings that withstand both mechanical influences and viruses is cost-intensive, necessitating a more cost-effective solution that maintains both antiviral and mechanical protection.
Innovation Solution
A banknote design featuring a protective lacquer with a two-layer structure, where the outer layer has a higher concentration of antiviral substance for effective virus protection and the inner layer provides mechanical strength with minimal antiviral substance, allowing for cost-effective production while ensuring both antiviral and mechanical protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective lacquer with antiviral substance is applied to the banknote, then antiviral protection is improved, but production cost increases
Solution Approach 1:
The patent applies a higher concentration of antiviral substance in the outer layer of the protective lacquer where virus contact occurs most frequently, while using a lower concentration in the inner layer. This local differentiation optimizes antiviral protection where it is most needed while reducing overall substance usage and production cost.
Solution Approach 2:
The protective lacquer is divided into multiple layers with different antiviral substance concentrations. The outer layer contains a higher proportion of antiviral substance for maximum virus counteraction, while inner layers contain progressively less, creating a gradient structure that balances protection and cost-effectiveness.
2Reliability
If a high proportion of antiviral substance is distributed throughout the entire protective coating thickness, then antiviral effectiveness is improved, but production cost increases
Solution Approach 1:
Instead of uniformly distributing antiviral substance throughout the entire coating thickness, the patent concentrates the highest proportion in the outer layer where viruses primarily contact the banknote. This localized concentration approach maintains antiviral effectiveness while significantly reducing the total amount of expensive antiviral substance required.
Solution Approach 2:
The patent applies antiviral substance partially - with high concentration only where most needed (outer layer) and reduced concentration in inner layers - rather than excessive uniform distribution throughout the entire coating. This partial action approach achieves sufficient protection at lower cost.
3Strength
If the protective lacquer layer is made thicker to withstand mechanical influences, then mechanical protection is improved, but the cost of incorporating antiviral substance throughout increases
Solution Approach 1:
The patent creates a multi-layer structure where the outer layer provides both mechanical protection and high antiviral concentration for surface contact protection, while inner layers provide structural support with reduced antiviral substance. This local differentiation allows thicker overall coating for mechanical strength without proportionally increasing antiviral substance costs.
Solution Approach 2:
The protective lacquer is structured as a composite material system with different layers having different compositions - the outer layer combines mechanical protection properties with high antiviral substance concentration, while inner layers provide structural integrity with lower antiviral content, creating a cost-effective composite structure.
Data Source
Figure 1~2
AI summary
Banknote (1) comprising a substrate (2), two security elements (3, 4) (e.g., printing between the substrate and the protective varnish) and a protective varnish (5), wherein the protective varnish (5) forms the outer surface (7) of the banknote (1) and the substrate (2) is at least partially surrounded by the protective varnish (5), wherein the protective varnish (5) is formed with an antiviral substance (6) (e.g., an additive such as silver additive, copper additive, zinc additive, quaternary ammonium salt additive and/or titanium dioxide additive), wherein the protective varnish (5) has a first layer (8) and a second layer (9), wherein the first layer (8) is formed on the outer surface (7) and the second layer (9) is formed between the first layer (8) and the substrate (2), wherein the first layer (8) has a higher proportion of the antiviral substance (6) than the second layer (9).