Treatment procedure for making textile fabric elastic consists of impregnating with soda to expand weft yarns

摘要

The procedure, for use with a textile fabric (1) having cellulose-based synthetic weft yarns, consists of impregnating the previously-bleached fabric in a bath (2) containing soda at 14 - 20 degrees Baume for a period of at least three minutes, after which it is squeezed to wring out at least 70 per cent of the soda solution and left to relax in air for at least one minute. The first wringing (3) and relaxing (4) stages are followed by second wringing (6) and relaxing (7) stages, a rinsing stage (8), two washing stages (9, 10) and a final wringing stage (11) before rolling. The process uses speed regulators to control the time of the impregnation and relaxation stages.