Abstract
Tactile properties are one of the most important attributes of porous polymeric materials such as textiles, comprising a subjective evaluation index for textile materials and functional clothing, primarily affecting the sensation of comfort during the wearing of a garment. A new test method was proposed, and a mechanical measurement system was developed to objectively characterize the tactile properties of porous polymeric materials by simulating the dynamic contact processes during human skin contact with the materials and in consideration of different aspects of tactile sensations. The measurement system can measure the bending, compression, friction, and thermal transfer properties in one apparatus, and is capable of associating the objective measurements with the subjective tactile sensations. The test and evaluation method, the components of the mechanical measurement system, the definition and grading method of the evaluation indices, and the neural network prediction model from objective test results to subjective sensations of tactile properties were presented. The experiments were conducted for the objective tests and correlation tests. Seven types of porous polymeric sheet materials from seven categories for the tactile properties were cut to a size of 200 mm × 200 mm and tested. Each index of tactile properties was significantly different (P < 0.05) between different sheet materials. The correlations of bending, compression, friction, and thermal transfer properties with Kawabata KES test methods were analyzed. An intra-laboratory test was conducted and an analysis of the variance was performed to determine the critical differences of within laboratory precisions of the measurement system. This mechanical measurement system provides a method and system for objective measurement and evaluation of tactile properties of porous polymeric sheet materials in industrial application.
Highlights
Comfort is the basic requirement in the daily life of human beings
A series of research works and methods developed based on the Kawabata Evaluation System (KES) system have been reported, with some focusing on combining objective and subjective evaluations to obtain a regression model to predict fabric handle [10], some focusing on the measurement of certain mechanical properties such as bending rigidity and the relationship analysis between KES and FAST system [11], and some paying attention to automatic test process control [12]
Lin et al took advantage of an automatic textile stiffness tester to measure the softness of cationic fluorinated polymers [26]. These methods can be applied for the objective measurement and characterization of certain mechanical or thermal properties of porous polymeric materials, which are related to the handle properties
Summary
Comfort is the basic requirement in the daily life of human beings. Porous polymeric materials in sheet shape, such as textile materials, which are widely applied in clothing and household products, play an important role in wearing comfort and comfort sensations. Based on the KES and FAST systems, fabric handle performances, including mechanical properties, have been investigated continuously in order to evaluate textiles and clothing comfort objectively [6]. A series of research works and methods developed based on the KES system have been reported, with some focusing on combining objective and subjective evaluations to obtain a regression model to predict fabric handle [10], some focusing on the measurement of certain mechanical properties such as bending rigidity and the relationship analysis between KES and FAST system [11], and some paying attention to automatic test process control [12]. Lin et al took advantage of an automatic textile stiffness tester to measure the softness of cationic fluorinated polymers [26] These methods can be applied for the objective measurement and characterization of certain mechanical or thermal properties of porous polymeric materials, which are related to the handle properties. The MTT test method and apparatus is able to measure and evaluate mechanical and physical properties simultaneously in one apparatus and quickly gives the evaluation results and the overall information on the tactile performance of porous polymeric materials
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