| 摘要 |
<p>A vapor-phase process for imparting a durable press to cellulosic-containing material (fabric or successive garments) is an improvement on U.S. Pat. No. 3,660,013, dated May 2, 1972, in that the material being treated is moved through successive treating compartments and is processed faster and more economically. The new process includes first introducing an abundant moisture content into the material at a first compartment or station while not in contact with any chemical treating agents (formaldehyde and sulphur-dioxide vapors) and in then conveying the material through a second compartment containing the chemical treating agents, while the material is at a cooler temperature than the temperature of the chemical compartment whereby to accelerate condensation of the chemical treating agents on the material and a faster reaction therewith. Exhausting is carried out following the chemical compartment in order to enable faster and more economical heating in the curing compartment that follows, and in order to avoid moisture buildup in the curing compartment. In an elongate passageway for treating garments, the respective compartments are divided off by air screens, flap valves and/or rollers. In addition, a slow exhausting lengthwise of the passageway is maintained to provide an effective seal at the entrance end.</p> |
