Process for controlling a bonding gas system

Details Process for controlling a bonding gas system Process for controlling a bonding gas system

D - Textiles, Paper

06

B

117/123, 23/181

D06B 5/08 (2006.01) D04H 3/14 (2006.01)

Patent

CA 1087371

ABSTRACT OF THE DISCLOSURE A process for controlling a bonding gas system is disclosed. The process controls temperature and compo- sition of an activating gas used for bonding a nonwoven web of continuous nylon filaments and for supplying the gas to a gas box at a temperature just about its dew- point. A monitored concentration of hydrochloric acid maintained at a predetermined temperature, is supplied to a stripper column; a gaseous HCl-water vapor-air mixture which contains a low volume percent of HCl is circulated through the stripper column so that the mix- ture evaporates a portion of the acid wherein the volume percent if HCl in the mixture is increased thereby form- ing a bonding gas having the desired HCl concentration; the temperature of the gas leaving the stripper column is controlled so that the HCl concentration of the gas is just above its dew-point and then the gas is fed into a gas box.

286902

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