Thermal - Acoustic Performance of 3D Spacer Fabrics and Their Possible Correlation
Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
TEXTILE BIOENGINEERING & INFORMATICS SOCIETY LTD, TBIS 2010 SECRETARIAT MN104, HONG KONG POLYTECHNIC UNIV, HONG KONG SAR, 0000, PEOPLES R CHINA
Abstract
Spacer fabrics is an unconventional three-dimensional textile material that has become a major focus for researchers due to their multifunctional application. It has two outer layers connected with monofilament or multifilament spacer yarn which keeps the fabric bulky with low density and high breathability. Due to its porous nature, interconnected pores, bulk and 3D structure, spacer fabrics have the ability to attenuate more sound energy than other conventional materials. The use of 3-Dimensional (3D) porous textile materials by the civil and mechanical engineers for improved thermo-acoustic environment have also widened the research scope. This research paper presents an experimental investigation on the sound absorption behaviour and thermal properties of warp knitted spacer fabrics. The Sound absorption coefficient (SAC) and thermal conductivity (K) were measured using two microphone impedance tube and Alambeta. Moreover, tortuosity of the spacer fabrics was also measured using ultrasonic transducers. This study discusses in depth the influence of material parameters and characteristics on acoustic properties of 3D spacer knitted fabrics. The results show that the fabric surface property, porosity, flow resistivity and tortuosity have significant effects on the sound absorbability as well as thermal conductivity. Finally, the paper describes regression equations and correlation between Noise reduction coefficient (NRC) and Thermal conductivity (K) for knitted spacer fabrics. The equation is useful to determine the NRC value with the K-value and vice versa which can be used to design the material for various applications.
Description
Subject(s)
Noise Reduction Coefficient (NRC), Spacer Fabrics, Flow Resistivity, Thermal Conductivity