Abstract
The utilization of CMC (carboxymethyl-cellulose) as a surface sizing agent has been studied. Through several experimental applications on a small size test paper machine, suitable conditions of CMC for the purpose of surface sizing were defined as follows : D.S. 0.50.8 Viscosity 50100 c.p. (3% soln., 25°C) Impurity Less than 25%The paper surface-sized by CMC showed such characteristics as high oil and air resistance and high wet tensile strength. These characteristics might enable us to use CMC for under coating besides general surface sizing. The practicality of CMC surface sizing was also approved qualitatively and economically by a test run on a commercial paper machine.
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