Improving the wet web strength and runnability

被引:0
|
作者
Retulainen, Elias [1 ]
Salminen, Kristian [1 ]
Lindqvist, Hanna [2 ]
Oksanen, Antti [1 ]
Sundberg, Anna [2 ]
机构
[1] VTT Tech Res Ctr Finland, Jyvaskyla, Finland
[2] Abo Akad Univ, Turku, Finland
来源
APPITA JOURNAL | 2012年 / 65卷 / 03期
关键词
Wet web; adhesion; strength; runnability; web breaks; SCALE MEASUREMENT PROCEDURE; PAPER-MACHINE;
D O I
暂无
中图分类号
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号
0805 ; 080502 ; 0822 ;
摘要
This paper presents recent runnability research carried out at laboratory and pilot scale. Factors affecting adhesion, tensile strength, tension and residual tension after relaxation of wet web were studied. Adhesion of the web to surfaces was found to be not only furnish specific but also dependent on the temperature, dry solids content, chemical properties and contamination of the surface. Wet web strength has been shown to be a property even more sensitive to papermaking variables than the dry strength. In addition to fibre and fines properties, several chemical additives have also been found to improve the wet web strength. Surfactant was also found to have a considerable positive effect on wet web due to increased dry solids content after wet pressing. Increased tension holding capability was found to require improvements in fibre network structure.
引用
收藏
页码:255 / 261
页数:7
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