Textile Damping Layer With Foamed Yarns to Prevent Cracking
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Solution Overview
Problem
Existing damping layers made of monolithic plastic foam are bulky and prone to cracking under load, compromising their mechanical properties and damping effectiveness.
Innovation Solution
A textile damping layer is formed by combining yarns, including foamed synthetic yarns, which are woven together before and after foaming, creating a strong, lightweight structure with enhanced load-bearing capacity and elasticity through the formation of plastic foam loops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If monolithic plastic foam is used to form damping layers, then the damping action is provided, but the layers become relatively bulky and have moderate tensile strength leading to cracking under load
Solution Approach 1:
The monolithic plastic foam is segmented into multiple discrete foam elements (beads, granules, or small particles) that are distributed throughout the textile structure. This segmentation prevents cracking by distributing stress across many small independent elements rather than one large continuous foam mass, thereby improving reliability while maintaining strength.
Solution Approach 2:
The damping layer is formed as a composite material combining textile fibers (natural or synthetic) with dispersed plastic foam elements. This composite structure provides both the mechanical strength and load-bearing capacity of the textile framework and the damping properties of the foam elements, resolving the contradiction between strength and damping performance.
2Reliability
If monolithic plastic foam is used to form damping layers, then the damping action is provided, but the layers become relatively bulky
Solution Approach 1:
Segmenting the foam into small discrete elements allows them to be densely packed within the textile structure without requiring excessive overall volume. The segmented foam elements can nestle between and around textile fibers, achieving effective damping in a more compact form factor compared to monolithic foam.
Solution Approach 2:
The foam elements are distributed locally throughout the textile structure at positions where damping is most needed, rather than using a uniform thick layer of monolithic foam. This localized distribution provides effective damping action while minimizing overall volume and achieving a thinner, more space-efficient design.
3Strength
If synthetic yarns are foamed after being incorporated into the textile, then the textile structure provides strength but the foamed yarns create large volume
Solution Approach 1:
The foam formation is segmented into small discrete elements rather than expanding into large continuous volumes. Each yarn segment transforms into multiple small foam beads or granules that remain contained within the textile framework, maintaining structural integrity while minimizing volume expansion.
Solution Approach 2:
The foam expansion is directed primarily in the radial direction around the yarn core rather than along the length of the yarn, transforming the volume increase from a linear extension into a compact spherical or granular form. This dimensional change allows the foam to occupy space efficiently without compromising textile strength or creating excessive bulk.
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 resulting damping layer is more efficient in distributing loads and providing improved user comfort and durability, with enhanced thermal and acoustic insulation, suitable for use under carpets and artificial turf pitches.
Implementation Method 1
at least some of the synthetic yarns are foamed
Implementation Method 2
The synthetic yarns can easily be foamed by heating them to a temperature of at least 100° C., preferably at least 150° C. and more preferably in the order of magnitude 200° C.
Data Source
AI summary
A damping layer comprises a large number of yarns combined to form a textile, wherein at least some of the yarns are foamed synthetic yarns. Such a textile, which consists of a mix of foamed and non-foamed synthetic yarns, is relatively strong and light and can lead to more efficient use of the foamed material. The foamed synthetic yarn may be formed into upstanding loops which provide additional resiliency and damping.