Radiation-Resistant Adhesive Layer for Stable Medical Skin Bonding
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Solution Overview
Problem
Existing adhesives used in medical applications lose wettability after radiation sterilization, leading to inadequate performance and potential skin damage due to excessive adhesive force or dropout.
Innovation Solution
A radiation sterilization-resistant adhesive layer comprising a (meth)acrylic polymer with specific structures and a wettability stabilizer, such as rosin ester resin or terpene phenol resin, maintains wettability and adhesiveness even after sterilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an adhesive including an acrylic polymer is subjected to sterilization treatment with radiation such as gamma rays and electron beams, then the adhesive achieves sterilization, but the crosslinking density increases and wettability reduces
Solution Approach 1:
The patent uses a composite adhesive system combining acrylic polymer with specific structures (benzophenone, benzyl, o-benzoylbenzoate, thioxanthone, 3-ketocoumarin, 2-ethylanthraquinone, or camphor quinone groups) and wettability stabilizers (rosin ester resin, terpene phenol resin, or their hydrides). This composite formulation allows the adhesive to undergo radiation sterilization while maintaining wettability through the synergistic effect of the polymer structures and stabilizer components.
Solution Approach 2:
The patent modifies the chemical structure parameters of the acrylic polymer by incorporating specific functional groups (benzophenone, benzyl, o-benzoylbenzoate, thioxanthone, 3-ketocoumarin, 2-ethylanthraquinone, or camphor quinone) that change the adhesive's response to radiation. These structural parameter changes enable the adhesive to maintain stable wettability after sterilization treatment.
2Reliability
If wettability is increased to improve adhesive properties, then adhesive force to skin improves, but excessive wettability induces damage to skin due to excessive adhesive force
Solution Approach 1:
The patent optimizes the chemical composition parameters of the adhesive by incorporating specific acrylic polymer structures and wettability stabilizers in controlled amounts. This parameter optimization achieves appropriate wettability that provides sufficient adhesive force while preventing excessive adhesion that could damage skin tissue.
3Object-affected harmful factors
If wettability is decreased to reduce adhesive force, then skin damage is reduced, but insufficient wettability induces dropout of medical member
Solution Approach 1:
The patent employs a composite adhesive formulation combining acrylic polymer with specific functional groups and wettability stabilizers (rosin ester resin, terpene phenol resin, or their hydrides). This composite system achieves a balanced wettability level that prevents both skin damage from excessive adhesion and dropout from insufficient adhesion.
Solution Approach 2:
The patent adjusts the chemical composition parameters including the types and ratios of acrylic polymer structures and wettability stabilizers to achieve optimal wettability. This parameter control ensures the adhesive provides sufficient retention to prevent medical member dropout while maintaining safe adhesive forces for skin application.
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 layer maintains appropriate wettability and adhesiveness, allowing stable bonding of medical devices to skin for extended periods without detachment, reducing skin damage and ensuring consistent performance.
Implementation Method 1
when an adhesive including an acrylic polymer or the like is subjected to sterilization treatment with radiation such as gamma rays and electron beams, crosslinking density increases
Implementation Method 2
sterilization treatment with radiation such as gamma rays and electron beams
Data Source
Figure 1
AI summary
Provided is a radiation sterilization resistant adhesive agent layer capable of reducing or preventing a decrease in wettability of an adhesive after radiation sterilization treatment. The adhesive can be used with a medical implement, for example medical implements that are sterilized. The adhesive agent layer includes a (meth)acrylic polymer and a wettability stabilizer, and the wettability stabilizer is at least one selected from a rosin ester resin, a terpene phenol resin, and hydrides thereof.