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Influence of Extensional Viscosity of Coating Color on the Runnability of Curtain Coating
  
DOI：10.11980/j.issn.0254-508X.2014.03.002
Key Words:curtain coating  extensional viscosity  runnability
Author NameAffiliation
张曦晨1,2 1.中国制浆造纸研究院，北京，100102；2.制浆造纸国家工程实验室，北京，100102 
刘金刚1,2 1.中国制浆造纸研究院，北京，100102；2.制浆造纸国家工程实验室，北京，100102 
王比松1,2 1.中国制浆造纸研究院，北京，100102；2.制浆造纸国家工程实验室，北京，100102 
李洪才1,2 1.中国制浆造纸研究院，北京，100102；2.制浆造纸国家工程实验室，北京，100102 
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Abstract:The experiments were carried out by using laboratorial sheet-fed curtain coater and coating colors with different formula. The results showed that as the increase of extensional deformation and extensional rate of the coatings, the surface defects of coating layers were more serious; the coating under higher machine speed was more easily to appear surface defects when the extensional deformation of the coatings was at the similar level; the coating color with high extensional viscosity tended to produce the coating layer with high coverage．
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