塗工層構造の分析による耐ブリスター性の研究

抄録

Blistering resistance during web-offset printing was studied by using a double coating procedure, styrene-butadiene latexes with different gel contents, and an electron probe X-ray microanalyzer (EPMA) to analyze the coating layer. The blistering resistance was highest at the precoated weight of 4 g/m² (both sides) and when the styrene-butadiene latex with the lowest gel content was used in the precoat. The gel content of the latex in the top coat has no effect on blistering resistance. The resistance to blistering phenomenon seems to depend on the properties of the coating layer near or on the substrate fiber. Based on the EPMA analysis of the single-coated paper, little calcium carbonate was found near the substrate fiber. It is possible that the uneven distribution in the z direction has an influence on the blistering tendency.