SURFACE FREE ENERGY OF COATED PAPER MEASURED BY OWENS METHOD

The lyophobic performance of coating layer depends on the surface free energy of coated paper.In this paper,the surface free energy of two kind of coated layers was investigated and measured by Owens method.The results indicated that the surface free energy and polar component(σsP) of the coating layer containing waterproof agent respectively decreased by 27.3% and 90.5% than that of control coated paper.The adhesion work(Wa) of waterproof coating layer to water was decreased by 35.4% and increased by 12.4% compared with that of waterproof coating layer to benzene.At the same time,the surface tensions of coating layer to water and benzene were 34.5 mJ·m-2 and 1.8 mJ·m-2,respectively.These results indicated that the coating layer containing waterproof agent had good lipophilicity and hydrophobicity.