Antibacterial Layer with Controlled Silver Ion Release
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Solution Overview
Problem
Existing antibacterial layers on devices such as medical equipment and touch panels lack sufficient light resistance and rapid antibacterial action, which can lead to discoloration and impaired visibility.
Innovation Solution
An antibacterial layer-attached base material with a silver-containing antibacterial agent, where the silver ions are controlled within a specific range (15 to 50 ng/cm²) and supported on a ceramic carrier, using a curable composition with a hydrophilic monomer and polymerizable groups, ensuring quick antibacterial action and resistance to light exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antibacterial layer contains silver to provide antibacterial action, then the antibacterial property is improved, but the light resistance deteriorates causing discoloration
Solution Approach 1:
The patent applies parameter changes by precisely controlling the silver ion concentration within 15-50 ng/cm² and adjusting the water contact angle to ≤40°. These parameter optimizations enable the antibacterial layer to maintain effective antibacterial action while significantly improving light resistance and preventing discoloration during prolonged illumination exposure.
Solution Approach 2:
The patent uses composite materials by combining silver-containing antibacterial agents with specific polymer matrices and hydrophilic components. This composite structure allows the silver particles to be evenly distributed and stabilized within the coating, maintaining antibacterial efficacy while the polymer matrix provides light resistance and prevents discoloration.
2Reliability
If the antibacterial layer uses conventional silver content to ensure antibacterial action, then the antibacterial effect is achieved, but the time required for antibacterial action is prolonged
Solution Approach 1:
The patent achieves rapid antibacterial action by optimizing the silver ion concentration parameter to 15-50 ng/cm², which is higher than conventional coatings. This increased silver ion availability enables the antibacterial layer to exhibit effective antibacterial action within a short period while maintaining light resistance through the optimized water contact angle and polymer matrix composition.
3Productivity
If the antibacterial layer is exposed to illumination light for a long period, then the device can be used continuously, but the antibacterial layer discolors and visibility is impaired
Solution Approach 1:
The patent employs composite materials consisting of silver-containing antibacterial agents embedded in a light-resistant polymer matrix with hydrophilic components. This composite structure protects the silver particles from light-induced discoloration while maintaining antibacterial efficacy, enabling continuous device usage without visibility impairment.
Solution Approach 2:
The patent improves light resistance by optimizing the water contact angle to ≤40° and controlling the silver ion concentration within 15-50 ng/cm². These parameter changes enhance the stability of the antibacterial layer under prolonged illumination, preventing discoloration and maintaining visibility during continuous device operation.
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 antibacterial layer exhibits excellent light resistance and rapid antibacterial action, preventing discoloration and maintaining device visibility while providing effective antibacterial properties within a short period.
Implementation Method 1
the amount of silver ions per a unit area measured in an extraction test to be described below is 15 to 50 ng/cm2
Implementation Method 2
R 2 represents a polymerizable group
Implementation Method 3
R 1 represents a substituent selected from a hydrocarbon group which may have a hetero atom or a hydrophilic group
Data Source
Figure 1
AI summary
The present invention provides an antibacterial layer-attached base material which has excellent light resistance and includes an antibacterial layer exhibiting an antibacterial action within a short period of time, an antibacterial sheet, a radiation photographing device, and a touch panel. The antibacterial layer-attached base material of the present invention is an antibacterial layer-attached base material including: a base material; and an antibacterial layer which is disposed on at least a part of the surface of the base material, in which the antibacterial layer contains at least one antibacterial agent containing silver, and the amount of silver ions per a unit area measured in an extraction test is 15 to 50 ng/cm2.