Multilayer Composite Dressing With Welded Polyester Layers
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Solution Overview
Problem
Current wound dressings adhere to biological tissues, leading to tissue removal during dressing change, uneven release of healing substances, and increased risk of infection, with frequent replacements causing discomfort and economic burden.
Innovation Solution
A multilayer composite material with a three-dimensional matrix of polyester fabric layers welded at intervals, containing a healing substance like hyaluronic acid, ensuring uniform and constant release, preventing tissue adhesion, and allowing painless removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single layer of supporting fabric is used to convey healing substance, then the dressing can be simple and cost-effective, but the healing substance is released rapidly and non-homogeneously, and the fabric adheres to biological tissues causing tissue removal during dressing change
Solution Approach 1:
The single layer of supporting fabric is divided into multiple superimposed layers (first layer, second layer, etc.) that are welded together at discrete points. This segmentation creates a three-dimensional matrix structure that distributes the healing substance more uniformly across the dressing surface, preventing rapid and non-homogeneous release while maintaining manufacturing feasibility through standardized welding processes
Solution Approach 2:
The dressing transitions from a two-dimensional single layer to a three-dimensional multi-layer matrix structure. This dimensional change increases the surface area for healing substance distribution and creates spatial separation that prevents adhesion to biological tissues, thereby improving release uniformity without significantly complicating the manufacturing process
2Quantity of substance
If the supporting fabric has large pores to distribute healing substance, then the healing substance can be conveyed effectively, but the fabric colonizes by scar tissue during dressing change requiring painful tissue removal
Solution Approach 1:
The supporting fabric is segmented into multiple layers welded at discrete points, creating a three-dimensional matrix with controlled pore structures. This segmentation allows effective healing substance distribution while preventing complete fabric colonization by scar tissue, thereby reducing tissue adhesion and removal pain during dressing changes
Solution Approach 2:
The multi-layer matrix structure creates locally optimized pore distributions that facilitate healing substance conveyance in certain regions while maintaining tissue compatibility in other regions. This local quality variation allows effective healing substance distribution without causing widespread tissue adhesion and subsequent pain during removal
3Adaptability or versatility
If natural fiber fabrics like cotton are used in gauzes, then the fabric is biocompatible and absorbent, but the fabric releases debris and residues in the wound complicating healing and causing aesthetic issues
Solution Approach 1:
The invention uses composite materials consisting of multiple fabric layers (potentially combining natural and synthetic fibers) welded together to form a multi-layer matrix. This composite structure maintains the biocompatibility and absorbency benefits of natural fibers like cotton while the synthetic components prevent debris release, thereby eliminating harmful effects without sacrificing essential biocompatible properties
4Reliability
If dressings are replaced every 6-8 hours, then the healing process can be monitored and fresh material can be applied, but economic costs increase and constant intervention is required
Solution Approach 1:
The multi-layer matrix structure provides excessive capacity for healing substance storage and release, allowing the dressing to maintain therapeutic effectiveness for extended periods. This partial saturation approach enables longer wear times (beyond the conventional 6-8 hours) while still providing adequate healing substance delivery, thereby reducing replacement frequency and associated costs without compromising treatment effectiveness
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 multilayer composite material provides uniform healing substance distribution, reduces tissue damage, minimizes infection risk, and allows extended wear without debris release, enhancing wound healing and reducing frequency of replacements.
Implementation Method 1
a first layer i. and a second layer ii. of a fabric comprising, or consisting of a polyester fiber, wherein said first layer i. and said second layer ii. are superimposed and welded together in at least two distinct and separate points
Data Source
AI summary
The present invention relates to a multilayer composite material for the treatment of wounds and lesions and to a dressing comprising said multilayer material.