Cellulose dope and method for producing the same

Details Cellulose dope and method for producing the same Cellulose dope and method for producing the same

2006-09-19

2006-09-19

Dye, Rena (Department: 1774)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Noninterengaged fiber-containing paper-free web or sheet...

C428S364000, C428S393000, C106S163010

Reexamination Certificate

active

07108907

ABSTRACT:
A cellulose dope comprising an aqueous sodium hydroxide solution and cellulose dissolved in the solution, wherein the cellulose dope has a sodium hydroxide concentration (CNa) of from 6.5 to 11% by weight, a cellulose content (Cc) of from 5 to 10% by weight, a viscosity average degree of polymerization (DPc) of the cellulose of from 350 to 1,200 and a cellulose dissolution ratio (Sc) of 99.0% by weight or more, and wherein the zero-shear viscosity (η0) and the cellulose content (Cc) of the cellulose dope and the viscosity average degree of polymerization (DPc) of the cellulose in the cellulose dope satisfy the following formula (1):in-line-formulae description="In-line Formulae" end="lead"?η0=kCcm×DPcp  (1)in-line-formulae description="In-line Formulae" end="tail"?wherein:η0represents the zero-shear viscosity (mPa·s) of the cellulose dope,Cc represents the cellulose content (% by weight) of the cellulose dope,DPc represents the viscosity average degree of polymerization of the cellulose in the cellulose dope,k=3.9×10−11,m is a number of from 5 to 7, andp is a number of from 3 to 4.

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Copy of Supplementary European Search Report dated Apr. 6, 2004.

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