Antibacterial Layer on Urethane Support for Curved Surfaces
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Solution Overview
Problem
Existing antibacterial polymer films used on curved surfaces tend to experience peeling issues between the polymer substrate layer and the polymer coating, compromising their effectiveness.
Innovation Solution
A support with an antibacterial layer comprising a urethane resin and a hydrophilic polymer, combined with a silver-based antibacterial agent, which ensures excellent followability on curved surfaces and prevents peeling by maintaining direct contact and optimal mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an antimicrobial polymer film is used on a curved surface, then antibacterial function is achieved, but peeling occurs between the polymer substrate layer and the polymer coating
Solution Approach 1:
The patent changes the material parameters by specifying that the support must contain a urethane resin and the antibacterial layer must contain a hydrophilic polymer with specific water contact angle properties (20° to 60°). These parameter specifications ensure both antibacterial effectiveness and resistance to peeling on curved surfaces by optimizing the material composition and surface properties.
Solution Approach 2:
The patent creates a composite structure combining a urethane resin support with a hydrophilic polymer antibacterial layer containing silver particles. This composite material design leverages the flexibility and adhesion properties of the urethane resin support while the hydrophilic polymer layer provides antibacterial function and controlled surface energy to prevent peeling.
2Adaptability or versatility
If the antibacterial layer is made to follow curved surfaces, then followability is improved, but adhesion between layers may deteriorate
Solution Approach 1:
The patent specifies that the support must contain a urethane resin, which inherently provides excellent flexibility and followability to curved surfaces. Additionally, the antibacterial layer is designed with specific water contact angle properties (20° to 60°) that optimize both conformability to curved surfaces and interlayer adhesion strength.
Solution Approach 2:
The patent applies different material properties to different layers: the urethane resin support provides flexibility and conformability to curved surfaces, while the hydrophilic polymer antibacterial layer provides adhesion and antibacterial function. This local differentiation of material qualities allows the structure as a whole to achieve both followability and adhesion strength.
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 solution effectively prevents peeling and maintains antibacterial properties while ensuring excellent followability on curved surfaces, enhancing the durability and effectiveness of the antibacterial layer.
Implementation Method 1
the antibacterial layer contains a hydrophilic polymer and an antibacterial agent
Data Source
AI summary
Provided are a support with an antibacterial layer, which exhibits excellent followability with respect to a curved surface and in which peeling does not easily occur between a support and an antibacterial layer even though the support with an antibacterial layer is bonded to a curved surface, and a laminate including the support with an antibacterial layer.The support with an antibacterial layer of the present invention includes a support and an antibacterial layer disposed in at least a portion on the support, in which the support contains a urethane resin, and the antibacterial layer contains a hydrophilic polymer and an antibacterial agent.