US 12,655,543 B2 · Hydrophobic cellulosic fiber

Abstract

The present disclosure relates to a continuous process for preparing hydrophobic regenerated cellulosic fiber. Said process comprises treating never-dried cellulosic fiber with a hydrophobic composition comprising 0.05-2.5 weight % of an alkyl ketene dimer based on weight of cellulose. The alkyl ketene dimer has a formula I: wherein both R1 and R2 are hydrocarbon groups having 8-40 carbon atoms and which can be both, saturated or unsaturated, straight-chained or branched. The hydrophobic composition further comprises 0.02-1 weight % of a cationic polymer based on weight of cellulose. After treatment with the hydrophobic composition, the treated fiber is subjected to a drying step to form hydrophobic regenerated cellulose fiber.

Claims20

Dependent claims

A continuous process for preparing hydrophobic cellulosic fiber, said process comprising treating never-dried cellulosic fiber with a hydrophobic composition comprising:

0.05-2.5 weight % of an alkyl ketene dimer based on weight of cellulose, the alkyl ketene dimer having a formula I:
wherein both R1 and R2 are hydrocarbon groups having 8-40 carbon atoms and which can be both, saturated or unsaturated, straight-chained or branched;
0.02-1 weight % of a cationic polymer based on weight of cellulose, followed by drying the treated fiber to form hydrophobic regenerated cellulose fiber,
such that the hydrophobic regenerated cellulosic fiber has a fiber-fiber friction of at least 7.0 N (peak at force), measured in accordance with sledge test (ANSI/ASTM D 1894-78).

1 more element

Dependencies are inferred from the claim text.

Hydrophobic cellulosic fiber

Life of this patent

Hydrophobic cellulosic fiber

Life of this patent

Abstract

Claims20