Cotton, nylon 6, and polyester fabrics were treated with three kinds of urethane resins. The urethane coated fabrics were subjected to low temperature plasmas of O₂, N₂, H₂, CF₄, CHF₃, and CH₄. The water repellency and water contact angle of the resultant fabrics were measured. Also the contact angles of various liquids of different surface tensions on the films of the urethane resins were investigated and the highest surface tension γc, (max) of the films was determined on the basis of the Zisman plots. It was found that the water repellency of the urethane coated fabrics was improved greatly by the low temperature plasmas of CF₄ and CHF₃. The effect of soaping and dry heat on the water repellency was checked. The water repellency was decreased by the soaping but recovered by the subsequent dry heat. The soiling and soil redeposition of the urethane coated and plasma treated fabrics were studied. Soil proof was found to be increased by the plasma treatments, in particular CF₄ and CHF₃ plasmas.

DESCENTE SPORTS SCIENCE Vol.10/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE