Abstract
Research on temperature under clothing using new materials while brush cutting was conducted. Two types of shirts were studied. One is a textile of yarn consisting of multi-layers of cotton and polyestel (worker's shirt A), and the other is a fine acrylic fiber knit (worker's shirt B). Temperature and absolute humidity under clothing were related to the temperature of the black bulb thermometer in the atmosphere. When perspiring, shirt A's permeability was obstructed, and the humidity increased. Shirt B has high levels of water absorption and permeability, but the thermal conductivity increased with an increase in perspiration. Shirts A and B were developed to improve comfortableness under ordinary outdoor conditions. Their shirts could not be fitted for high levels of pirspiration. However, the shirts will be able to display functions in cooling the body temperature through transpiration in cloudy and windy conditions or in low humidity and windy weather.
