Fluoro-Polymer Coated Yarn for Protective Clothing
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Solution Overview
Problem
Existing yarns with high mechanical properties for protective fabrics are prone to delamination and core breakage during washing due to sliding wires, leading to reduced durability and usability.
Innovation Solution
A yarn design featuring a core coated with a fluoro-polymer layer and multiple windings in opposing directions to enhance adhesion and prevent sliding, using filaments like glass, steel, or ceramic, with a method involving coating and winding processes to create a stable and durable structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If wires are wound in multiple directions to form covering layers, then mechanical properties and wear resistance are improved, but the yarn becomes delicate and prone to delamination during washing
Solution Approach 1:
A fluoro-polymer layer is introduced as an intermediary substance between the filament core and the wound wire covering layers. This layer serves as a bonding agent that chemically or physically adheres to both the filament surface and the wire covering, preventing delamination during washing while maintaining the multi-directional winding structure's mechanical strength
Solution Approach 2:
The yarn is constructed as a composite structure combining different materials with complementary properties: a fluoro-polymer coated filament core providing chemical resistance and adhesion, plus metal wire covering layers providing mechanical strength and wear resistance. This composite approach allows each material to contribute its advantageous properties to the overall yarn performance
2Stability of the object's composition
If internal wires are superposed on the filament core, then mechanical stability is improved, but the core tends to break during washing operations
Solution Approach 1:
The fluoro-polymer layer acts as a protective intermediary coating on the filament core surface. This layer distributes mechanical stresses uniformly across the core during washing, preventing stress concentration points that would cause core breakage, while still allowing the internal wire structure to provide mechanical stability
3Strength
If the fluoro-polymer layer is made thicker to enhance protection and adhesion, then wear resistance is improved, but the weight of the yarn increases
Solution Approach 1:
The thickness and composition of the fluoro-polymer layer are optimized by adjusting parameters such as polymer molecular weight, cross-linking density, and coating concentration. This allows achieving maximum protective and adhesive properties with minimum layer thickness, thereby minimizing weight increase while maintaining enhanced wear resistance and adhesion
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 yarn exhibits improved mechanical stability, comfort, and extended lifespan through enhanced adhesion and resistance to washing, maintaining integrity after multiple wash cycles and in corrosive environments.
Implementation Method 1
the fluoro-polymer layer, in addition to - chemically and physically - protecting the filament that it at least partially covers, serves to promote the adhesion of the first covering 14 to the core 8
Data Source
AI summary
Yarn (1, 2, 4, 6) comprising a core (8) that comprises a filament (10) that extends along a filament axis (X) and that is at least partially coated by a fluoro-polymer layer (12), a first covering (14) of the core (8), obtained by winding at least one first yarn (16) or a first sliver (18, 18') in a first winding direction, so as to achieve a closed coiling, at least a part of the first yarn (16) or first sliver (18, 18') being incorporated in the fluoro-polymer layer (12) so as to anchor the first covering (14) to the filament (10).