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US 7,252,741 B2Granted
Method of making a paper web containing refined long fiber using a charge controlled headbox and a single ply towel made by the process
AssigneeGeorgia-Pacific Consumer Products LP
InventorsKang Chang Yeh, Gary L. Worry, Thomas N. Kershaw, Henry S. Ostrowski
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Abstract
A method of forming a cellulosic web is discussed, the product of which may, for example, possess at least one of increased softness, strength, and absorbency. The method measures the total anionic charge and controls the net charge of an aqueous stream.
Claims6
A method of forming a cellulosic web comprising:
- (a) supplying to a headbox an aqueous stream comprising a major proportion of refined long fiber;
- (b) supplying to the aqueous stream a cationic wet strength agent and an anionic strength agent;
- (c) measuring the total anionic charge carried by the aqueous stream;
- (d) controlling the amount of the cationic wet strength agent and the anionic strength agent so that the net charge of the aqueous stream is maintained in the range of from less than about 0 to about −115 meq×10−6 per 10 ml;
- (e) depositing the aqueous stream on a first moving foraminous support to form a web;
- (f) transferring the web to a second moving foraminous support;
- (f) compressively dewatering the web;
- (g) transferring the web to a Yankee cylinder to dry the web to a consistency of at most about 98%;
- (i) creping the web from the Yankee cylinder.
6 more elements
Dependencies are inferred from the claim text.