Quantification of the easiness for working and comfortableness of farm working clothes (Part 4): Absorption of evil-smelling substances by fabrics

摘要

The absorption of some evil-smelling substances was investigated for various fibers: wool, cotton, nylon, acrylic, and polyester. As evil-smelling substances, we chose ammonia (NH{sub}3) hydrogen sulfide (H{sub}2S), acetic acid (CH{sub}3COOH),acetaldehyde (CH{sub}3CHO), and formaldehyde (HCHO), which are often emitted in agricultural works. In addition, the effect of moisture content in fibers on the absorption evil-smelling substances was investigated. The results obtained are as follows. 1)The amount of absorption was largely dependent on the type of fibers,. while it was slightly dependent on the type of evil-smelling substances. In the case of NH{sub}3, the amount was in the following order; Wool>Cotton>Nylon>Acrylic>Polyester. In thecase of H{sub}2. S, Cotton>Wool>Polyester>Nylon>Acrylic. In the case of CH{sub}3COOH, CH{sub}3CHO, and HCHO, Wool>Cotton>Nylon>Polyester>Acrylic. 2) The amount of sorption increased nearly in proportion to the moisture content of fibers. 3) The amount ofabsorption for HCHO which shows a good affinity for water, gradually increased with the relative humidity in lower relative humidity region, and it more drastically increased in higher relative humidity region. In the former region it behaved in a mannerof Langmuir equation. 4) The amount of absorption extrapolated to zero mg/g of moisture content is proportional to the solubility parameter of fibers. This fact may indicate that the solubility parameter can be used as a measure of the characteristicabsorption to fibers.