Yarn compaction crimping - maintaining gas surrounding compaction chamber at partial vacuum and const temp to improve crimping

摘要

Synthetic yarn texture uniformity is increased relative to that obtd. by the method claimed on 2061814 in that the pressure of the gas surrounding the compaction crimping chamber is maintained at a partial vacuum pressure of 0.02 to 0.04 relative to atm pressure and the volume and temp are maintained at a const. value.