| 摘要 |
A novel treating method and commercial apparatus for carrying out this method have been developed for reacting prepressed cellulosic and cellulosic-blend garments with cross-linking agents in a gaseous phase to impart a durable press thereto. The durable press finish is imparted by placing the garments in a closed chamber typically at room temperature from 70 DEG F to 80 DEG F or, if preheated, at a temperature not in excess of 150 DEG F, adding formaldehyde gas and sulphur dioxide gas and steam for several minutes causing the temperature in the chamber to rise due to the steam, cutting off the steam and allowing the temperature to drop to saturate the atmosphere and cause greater condensation of steam through the garments, and then heating the chamber to a temperature of the order of 250 DEG F to complete the crosslinking operation. Next, the garments may be freed of residual odors by flushing the chamber with fresh air and/or steam. The apparatus comprises an openable treating chamber adapted to be heated as by steam ducts and having therein a heated tray for receiving paraformaldehyde and vaporizing the same. Also, means are provided for introducing controlled amounts of steam and of sulphur dioxide as the catalyzing agent. The chamber has suitable ports enabling it to be flushed by fresh air and by steam.
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