Study On The Frictional Tactile Perception Of Fabric Comfort

The tactile texture of the fabric determines consumers' recognition and satisfaction with the product,and is the key factor affecting the design,production and sale of the textile.The traditional tactile texture of fabric is characterized mainly by the physical properties of the fabric surface and the cognitive behavioral investigation methods.And fabric texture evaluation involving the skin "sense" and "knowledge" of the brain and subjective "review",so in this article,through subjective cognitive appraisal,skin friction test,electrical,and functional magnetic resonance experiment,the system overall,friction touch perception of fabric is studied preliminarily explore the formation mechanism of the fabric feel comfort,and the method for quantitative characterization of fabric texture.The main research results are as follows:1.Studies on the physical properties and cognitive behavior of the fabric surface show that the critical bending load of the fabric can quantitatively characterize the tickling sensation of the fabric.The larger the critical bending load,the stronger the tickling sensation,and the lower the comfort.Skin friction and vibration tests show that the gravity center of power spectrum and friction coefficient can quantitatively characterize the fineness and smoothness of the fabric.The larger the friction coefficient,the worse the slippiness of the fabric.The greater the power spectrum barycenter value is,the better the texture of the fabric surface is.The texture and smoothness of the fabric are positively correlated with the comfort of the fabric.2.The EEG experimental study on the tactile stimulation of three different comfort levels(comfort relationship is Min > Mid > Max)fabric showes that the latency of P100 induced by Mid sample is the latest and the amplitude is the largest.The incubation period of P200 component induced by Min,Mid and Max samples decreased in turn,and the peak value increased in turn,with significant difference,which is mainly due to the difference of physical properties of the fabric surface.Min,Mid,and Max sample induced P300 component have the same incubation period,P300 component peak,in turn,increases,and it has significant difference,the difference is mainly due to three kinds of target surface physical properties of fabric and non-target stimulate fabric,leading to the brain in the judgment of tactile information processing strength and the need to pay attention to the different resources.3.The recursive graph and the recursive parameter results of the fabric stimulated EEG signal show that the nonlinear recursive characteristics of the tactile EEG signal show a trend of stable state,violent fluctuation state and periodic state.During the 0-400 ms period after touch,all the recursive parameters are in the order of Max >Mid >Min.The results show that fabrics with large fiber diameter and critical yield load and small warp and weft density had strong tickling sensation,poor slippage sensation and poor comprehensive comfort.During the 0-400 ms ERP component generation stage,it is more likely to cause the nonlinear fluctuation of the brain system.4.Nuclear magnetic resonance test shows that when the human body touches the fabric,the activation area involves the left and right brain,and the activation intensity includes positive and negative activation.The area of primary somatosensory cortex is the largest and the intensity is the strongest,and the area of posterior central gyrus tissue is the largest.The activation intensity of posterior central gyrus and anterior central gyrus is greater than other tissue areas.The changes of the activation intensity and the activation area of the brain region were the same.The changes of the size and intensity of the activated brain region are the largest in the Mid sample,while the changes of the area and intensity of the activated brain region are the least in the Max sample.