Testing And Comprehensive Evaluation Of Textile Thermal And Wet Comfort Performance

With the improvement of living standards and technological development,innovative textile technology and diverse living standards have changed the demand for fabrics.Nowadays,the comfort of textiles,especially the thermal and wet comfort has become the subject of great concern to researchers.However,for the study of the thermal and wet comfort of fabrics,there is no systematic disclosure of the effect of fiber-yarn-fabric,etc.,and due to the malleability and flexibility of knitted fabrics,the fabrics have better air permeability and moisture permeability.The focus is on knitted fabrics,and there is little research on the thermal and wet comfort of woven fabrics.Therefore,this paper mainly starts from three aspects of fiber properties,spinning parameters,and fabric parameters,and uses the controlled variable method to design experiments.Weft plain knitting samples and 13 kinds of 2/2 left diagonal woven samples.Through testing the basic performance indexes and thermal and moisture comfort indexes of the sample,using SAS software,using single factor analysis of variance and principal component analysis,the main factors affecting the thermal and moisture comfort of the fabric are analyzed,and the thermal and moisture of the fabric are comprehensively evaluated Comfortability is good or bad.Taking fiber profile as the influencing factor,five polyester fibers with round,flat,triangular,cross,and dumbbell cross-sections were selected,and the horizontal and vertical morphologies were observed by optical microscope and scanning electron microscope.At the same time,the five kinds of fibers and ordinary polyester fibers were blended at a blending ratio of 80:20 to obtain five kinds of blended polyester yarns with a linear density of 19.4tex.By weaving on the machine,weaved into a structure with a similar density of knitted fabrics of weft plain needles and 2/2 left diagonal woven fabrics.The yarn linear density,spinning method,and fiber types of these ten samples were all the same.The heat and moisture comfort properties of the fabrics,such as breathability and moisture permeability,were tested.The results show that for fabrics with two structures,as the fiber profile increases,the fabric breathability increases,the moisture permeability increases,and the wicking height increases 3.The insulation rate is reduced.Because the surface density of woven samples is greater than that of knitted samples,the air permeability of knitted samplesis much greater than that of woven samples,the moisture permeability is greater than that of woven fabrics,the thermal insulation is less than that of woven fabrics,and the wicking height is not much different between the two fabrics.The fabrics woven with dumbbell-shaped yarns have the best overall performance in heat,moisture and comfort.Taking the fiber type as the influencing factor,pure cotton fiber,bamboo fiber,pure modal fiber,cotton / bamboo fiber(50/50),cotton / modal fiber(50/50)with a yarn linear density of 14.8 tex were selected.The tissue structures with close density are knitted fabric with weft flat needles and woven fabric with 2/2 left diagonal.The yarn linear density and spinning method of the ten samples are the same.The thermal resistance,moisture resistance,air permeability,moisture permeability and thermal insulation of the samples were tested separately,and the data was analyzed using the principal component analysis method to obtain a comprehensive evaluation formula.The results show that the fiber type has a significant effect on the thermal and moisture comfort properties of the fabric.For samples of the same structure and different raw materials,the fabric woven by Modal fiber has the best breathability,warmth and moisture permeability,and the cotton fabric has the best moisture permeability;For samples with the same raw material and different structure,the air permeability and moisture permeability of knitted fabrics are greater than that of woven fabrics,and the thermal insulation rate and moisture permeability are less than that of woven fabrics.Under the same structural parameters of the fabric,the heat and moisture comfort of Modal fiber is significantly better than other fiber types.Taking the spinning method as the influencing factor,the yarn forming principle and internal structure of the ring spinning,vortex spinning and Siro spinning were compared and analyzed.The linear densities of the ring spinning,vortex spinning and Siro spinning were all selected.19.4tex polyester yarn,using super depth of field microscope to observe the surface morphology of the three yarns,and weave these three yarns into a knitted fabric with a weft plain needle structure and a 2/2 left diagonal woven fabric.The yarn linear density and fiber type of the six samples are the same.The air permeability and moisture permeability,vertical wicking and thermal insulation of the samples were tested.The results showed that the air permeability of the vortex spinning samples was higher than that of the Siro spinning samples for the same structure and different spinning methods.35.22% and 21.79% of the vortex spinning sample;the moisture permeability is higher than the 5.93% and4.73% of the two samples;the wicking height at 30 min is higher than the 22.79% and15.44% of the two samples respectively;The moisture resistance is the smallest.The thermal insulation rate of the ring spinning sample is higher than that of the vortex spinning sample and the Siro spinning sample by 10.70% and 16.87%,respectively,and the thermal resistance is the largest.For samples with the same spinning structure and different structure,the air permeability and moisture permeability of knitted fabrics are greater than that of woven fabrics,and the thermal insulation rate and moisture permeability are less than that of woven fabrics.Vortex textiles have the best overall performance in thermal and wet comfort.