Infusion Set Adhesive Composite Backing and Active Agent Regions
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Solution Overview
Problem
Conventional infusion set adhesive systems face issues with water resistance, edge curling, and sensitivity to body perspiration, and lack customization for different body parts and user activities, with limited options for peel strength.
Innovation Solution
A multi-layer adhesive system comprising a nonwoven backing layer and a larger polyurethane layer with a pressure-sensitive adhesive, where the adhesive surface is divided into regions for active agents like antimicrobials, wound-healers, and antiperspirants, and a release liner to prevent contamination, allowing for customizable adhesion strength and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If nonwoven polyester is used as backing layer, then structural integrity is improved, but water resistance deteriorates
Solution Approach 1:
The patent applies composite materials by combining nonwoven polyester and polyurethane sheet materials in a single backing layer structure. The nonwoven polyester provides structural integrity and tensile strength, while the polyurethane sheet contributes water resistance and conformability. This composite approach resolves the contradiction by integrating the complementary properties of both materials into one functional backing layer.
2Strength
If nonwoven material is used as backing layer, then structural integrity is improved, but edge stability deteriorates
Solution Approach 1:
The combination of nonwoven polyester and polyurethane sheet creates a composite backing layer where the polyurethane component provides edge stability and prevents curling, while the nonwoven polyester maintains overall structural integrity. The synergistic interaction between these materials resolves the edge stability issue without compromising structural strength.
3Reliability
If polyurethane sheet is used as backing layer, then water resistance is improved, but handleability deteriorates
Solution Approach 1:
The composite backing layer combines polyurethane sheet's water resistance with nonwoven polyester's stiffness and ease of handling. The nonwoven polyester component provides sufficient rigidity to prevent self-sticking and folding during application, while the polyurethane layer maintains water resistance. This composite structure resolves the handleability contradiction.
4Device complexity
If single adhesive system is used, then device simplicity is improved, but adaptability deteriorates
Solution Approach 1:
The adhesive system incorporates regions with different adhesive strengths within the same patch, allowing optimization for specific application sites. The backing layer materials and adhesive formulation are tailored to provide appropriate adhesion characteristics for different body parts and activity levels, resolving the contradiction between simplicity and adaptability.
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
Enhances structural integrity, water resistance, and user customization, providing tailored adhesion for different body sites and activities while minimizing the impact of body perspiration on adhesive performance.
Implementation Method 1
a region of the adhesive surface formed by the nonwoven and polyurethane backing layers facing the user is covered with a layer of pressure sensitive adhesive
Data Source
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AI summary
Improvements in an adhesive patch for an infusion set include the addition of an antiperspirant, wound healing and/or antimicrobial agent to the adhesive surface, and the layering of different backing materials to improve performance characteristics of the patch. Patches may be offered as part of a product line, in which differently shaped patches are provided for attachment to different parts of the body, and different pressure sensitive adhesives provide different peel strength according to different use patterns of the end user.