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US 5,505,888 AGranted
Process for preparation of cellulose acetate fibers useful in preparation of paper products
AssigneeEastman Chemical Company
InventorsMelvin G. Mitchell, Lee R. Partin
Life of this patent
Estimating the term…
Abstract
A process to prepare cellulose acetate fibers useful for preparation of paper products. This process includes (A) tensioning a running band of cellulose acetate filter tow, (B) contacting the tensioned tow with water, (C) removing water from the tow, (D) drying the tow, (E) cutting the dried tow into lengths, and (F) packaging the cut tow.
Claims5
A process comprising
- (A) tensioning a running band of cellulose acetate filter tow,
- (B) contacting the tensioned tow with water at a temperature in the range of 20.degree. to 90.degree. C.,
- (C) removing water from the tow to result in the amount of water being less than 60 weight percent, based on the weight of the tow and water,
- (D) drying the tow to reduce the water content to less than 20 weight percent, based on the weight of the tow and water,
- (E) cutting the dried tow into lengths in the range of 1/8" to 3/4", and
- (F) packaging the cut tow.
3 more elements
A process comprising
- (A) tensioning a running band of cellulose acetate filter tow,
- (B) contacting the tensioned tow with water at a temperature in the range of 30.degree. to 50.degree. C.,
- (C) removing water from the tow to result in the amount of water being less than 60 weight percent, based on the weight of the tow and water,
- (D) drafting the tow in the range of 1 to 20 percent,
- (E) drying the tow to reduce the water content to less than about 10 weight percent, based on the weight of the tow and water,
- (F) cutting the dried tow into lengths of about 1/4, and
- (G) packaging the cut tow.
4 more elements
Dependencies are inferred from the claim text.