Coated Textile Microchannels for Stable Sound Absorption
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Solution Overview
Problem
Existing textile fabrics with micro-openings for sound absorption lack stability, as the micro-openings can easily enlarge or fray, leading to reduced effectiveness in sound absorption due to instability and lack of coating around the openings.
Innovation Solution
A textile fabric with dimensionally stable microchannels, where the microchannels run through both the fabric layer and a coating layer, ensuring the shape and size are fixed by the coating material, and filaments from the fabric layer extend into the microchannels to prevent closure, maintaining their openness for improved sound absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If micro-openings are created by removing threads or binding techniques, then sound absorption capability is improved, but stability of micro-openings deteriorates
Solution Approach 1:
The coating layer is applied to the fabric surface before the micro-opening formation process. This preliminary coating prevents the micro-openings from fraying or enlarging after thread removal, as the coating material seals the edges of the openings and provides structural support to the surrounding fabric areas.
Solution Approach 2:
The invention combines fabric material with coating material to create a composite structure. The fabric provides the base structure and sound absorption capability, while the coating material reinforces the micro-opening edges and prevents deterioration, creating a synergistic composite material that solves both stability and manufacturability issues.
Data Source
Figure 1
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AI summary
The invention relates to a textile flat structure, wherein the textile flat structure has at least one woven fabric layer made from fibrous material, wherein a first surface of the woven fabric layer has a first coating layer made from coating material over its full surface area and a second surface of the woven fabric layer has a second coating layer made from the same coating material over its full surface area, wherein the textile flat structure has microchannels, wherein the woven fabric layer is permeated in order to form the microchannels, with the result that, in some microchannels, filaments of the woven fabric layer reach into the microchannels, and the microchannels extend through the first coating layer and through the woven fabric layer, and at least some of the microchannels have coating material and fibrous material at their lateral boundary. Furthermore, the invention relates to a method for producing a textile flat structure of this type.