| 摘要 |
A process for controlling a bonding gas system is disclosed. The process controls temperature and composition 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 above its dew-point. A monitored concentration of liquid HCl, maintained at a predetermined temperature, is supplied to a stripper column; an HCl-water-air mixture which contains a low volume percent of HCl is circulated through the stripper column so that the mixture evaporates a portion of the liquid HCl wherein the volume percent of HCl in the mixture is increased thereby forming 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. |
