Abstract
The hydrophilic polyester fabrics were prepared (by the chemical treatment) to investigate the effects of the hydrophilic nature of the constituent fibers on the warmth retention of the wetted fabrics. By comparing the thermal insulation of the hydrophilic polyester fabrics with untreated ones, it was found that the warm air in the space between the skin and clothing was cooled through the pores filled with water across the fabrics. For the purpose of this experiment, the thermal insulation tester (ASTM-type, Toyoseiki Co., Ltd.) was improved to detect the changes in thermal insulation of the fabrics by wetting.
