Polymer-coated fabric
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Solution Overview
Problem
Current polymer-coated textiles for medical support surfaces face challenges in achieving regions with different physical or visual characteristics without seams, which can compromise breathability, durability, and patient comfort, often requiring multiple fabrics or overlapping layers that introduce ridges or reduce stretch and breathability.
Innovation Solution
A waterproof composite fabric with a continuous polymer layer featuring adjoining regions of different physical or visual properties, applied in a side-by-side arrangement using modified knife-over-roll coating methods, allowing for simultaneous application of multiple polymer compositions to create a seamless, flat surface with enhanced durability and breathability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple fabrics or overlapping layers of different polymer compositions are used to create regions with different physical characteristics, then the fabric can achieve desired durability and breathability in different regions, but seams or ridges are introduced that compromise patient comfort and stretch properties
Solution Approach 1:
The patent merges multiple polymer compositions into a single continuous polymer layer applied to the textile substrate. Different polymer compositions are applied side-by-side in different regions of the fabric, creating zones with different physical characteristics (durability, breathability) without requiring separate fabric pieces or overlapping layers. This eliminates seams and ridges that would compromise patient comfort and stretch properties.
Solution Approach 2:
The patent applies different polymer compositions to specific regions of the textile substrate to create local variations in physical characteristics. For example, more durable polymer compositions can be applied to high-wear areas while more breathable compositions are applied to areas requiring patient comfort. This allows tailored functionality in different zones of the same fabric without compromising overall performance.
2Reliability
If a continuous polymer layer is applied to provide waterproofing and durability, then the fabric gains protective properties, but the polymer coating may impede the mechanical properties and stretchability of the fabric
Solution Approach 1:
The patent changes the parameters of the polymer coating by using multiple polymer compositions with different properties in different regions. By selecting polymers with appropriate elasticity, flexibility, and bonding characteristics, the coating provides waterproofing and durability while maintaining the stretchability and mechanical properties of the underlying textile substrate. The thin, continuous nature of the coating minimizes impeding effects on fabric mechanics.
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 provides a seamless, durable, and breathable composite fabric suitable for medical support surfaces, eliminating the need for seams and maintaining the fabric's mechanical properties, thus enhancing patient comfort and reducing the risk of irritation or contamination.
Implementation Method 1
Knife-over-roll coating is a method for applying a liquid coating to the surface of a substrate which is well established in the art, and commonly used in both transfer-coating and direct-coating
Implementation Method 2
The polymer is typically dissolved in one or more solvents or heated to achieve the required flow
Implementation Method 3
The polymeric layer may be dried on the carrier prior to application of the textile (dry lamination)
Data Source
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AI summary
Waterproof composite fabrics comprising a textile layer and a continuous polymer layer that comprises adjoining first and second regions with different physical or visual properties, and knife-over-roll coating methods for manufacturing said composite fabrics. The waterproof composite fabrics described are particularly suitable for covering medical support surfaces, for instance mattresses.