Light-Switchable Adhesive for Ostomy Skin Attachment and Removal
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Solution Overview
Problem
Ostomy device adhesives face challenges in securely attaching to moist, irregular, and moving skin surfaces, leading to leakage and skin damage, while also requiring easy removal without residue.
Innovation Solution
A light-switchable adhesive composition with two different photoinitiators, allowing the adhesive to exist in three states: application, wear, and removal states, with reversible transitions to ensure secure attachment and easy removal, utilizing photoinitiators with distinct absorption spectra for controlled switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the adhesive is made to securely attach to moist and irregular skin surfaces, then the adhesion strength is improved, but the removal process becomes difficult and may cause skin damage
Solution Approach 1:
The adhesive composition is designed to dynamically change its properties through light-triggered switching between two states: a first state with high adhesion strength for secure attachment to moist skin, and a second state with reduced adhesion strength for easy removal. This dynamic transformation resolves the contradiction by allowing the adhesive to optimize for either attachment or removal at different times, never requiring simultaneous compromise between the two opposing requirements.
Solution Approach 2:
The invention utilizes photo-switchable molecules that change their adhesive parameters in response to light exposure. By controlling the wavelength and duration of light exposure, the adhesive's bonding strength can be precisely adjusted between two distinct states, enabling strong attachment when needed and easy removal when needed, thereby resolving the contradiction between strong adhesion and easy removal.
2Reliability
If the adhesive composition is made complex with multiple photoinitiators for controlled switching, then the reliability of state control is improved, but the device complexity increases
Solution Approach 1:
The adhesive composition is segmented into multiple functional components, each with a specific role: photo-switchable molecules for state transformation, multiple photoinitiators for reliable light-triggered switching, and skin-safe carriers. This segmentation allows each component to be optimized independently for its specific function, improving overall reliability while keeping the overall system manageable through clear functional separation.
Solution Approach 2:
The invention employs a composite adhesive formulation combining photo-switchable molecules, multiple photoinitiators with different absorption spectra, and skin-safe carrier materials. This composite approach integrates multiple functional properties into a single adhesive composition, achieving reliable state control through the synergistic interaction of components while maintaining a unified, easy-to-apply product form.
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 composition provides secure attachment to prevent leakage, maintains skin health by easy and non-traumatic removal, and avoids residue, enhancing the quality of life for ostomy device users by ensuring reliable adhesion and easy detachment.
Implementation Method 1
the light-switchable adhesive composition comprises at least two different photoinitiators with different absorption spectra
Implementation Method 2
exposing the switchable adhesive to a first switch activator, thereby switching the switchable adhesive from an application state to a wear state
Data Source
AI summary
Disclosed is a method for applying an adhesive composition to the skin of a user and for removing the adhesive composition from the skin. The method includes the steps of providing an adhesive composition including a switchable adhesive; applying the adhesive composition to the skin; exposing the switchable adhesive to a first switch activator, thereby switching the switchable adhesive from an application state to a wear state; exposing the switchable adhesive to a second switch activator, thereby switching the switchable adhesive from the wear state to a removal state; and removing the adhesive composition from the skin of the user.