Acetate tow having high crimp modulus and manufacturing method thereof
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United States of America Patent
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-
Jul 6, 1993
Grant Date -
N/A
app pub date -
Nov 16, 1990
filing date -
Nov 17, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An acetate tow having crimp modulus, wherein a degree of crimping of the acetate tow at a position just downstream of a delivery roller of a filter rod making machine used to form a filter rod is 1.4 or more. When the acetate tow is bloomed in the filter rod making machine, a tendency which the acetate tow is caught on a feed roller becomes very low, and when the filter rod is formed of the acetate tow, a filter rod having a high pressure drop can be obtained. The present invention further includes a method of manufacturing the acetate tow, in which a specified acetone content is maintained in the acetate tow and a specified temperature, determined on the basis of the acetone content, is used in a process of crimping the acetate tow.
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