Thermal Insulation Properties of Woven Structures
topic
Woven fabric thermal insulation is determined primarily by fabric thickness and the entrapped air volume within the fabric structure, with fabric thickness governed by yarn count, weave crimp, and the number of layers in compound weave structures, while the proportion of still air within the fabric being the primary insulation mechanism from air's low thermal conductivity of 0.025 watts per metre Kelvin compared to fibre values above 0.2, with honeycomb and waffle weave structures increasing surface area and air entrapment for improved insulation.
Role
Provides the structural basis for designing woven fabrics with target thermal insulation performance through the relationships between weave geometry, fabric thickness, and air content, with thermal performance optimisation guiding the selection of weave structures and fabric constructions for thermally protective apparel and bedding where the combination of fabric thickness and air entrapment efficiency determines the warmth-to-weight ratio that defines product quality in thermal protection applications.