The article analyses an effect of paper strain rate on energy absorbed during tensile testing. The tests were carried out in the range where the effect of inertia forces could be omitted. A new calculation method is proposed to predict variations in breaking energy caused by changes in strain rate. The method was verified by laboratory tests and calculation results and its practical usefulness was confirmed. [ABSTRACT FROM AUTHOR]
Friction between different papers, flexographic and laser prints were investigated experimentally and static (SCOF) and kinetic (KCOF) friction coefficients between paper and paper, paper and prints, prints and prints were determined. The dependence of the the SCOF and KCOF values on the paper PPS roughness, paper grammage and ink content on prints was investigated. The results showed that highest friction is between paper and prints and lowest is between two prints. It was found that SCOF and KCOF deacrease with pressure. Static friction coefficient increases with paper roughness and kinetic coefficient remains constant. [ABSTRACT FROM AUTHOR]
Impact of maintenance conditions upon the paper resistance was investigated. Dependencies of tensile strength and resistance to bending of different paper type on paper fibers direction and humidity were presented. [ABSTRACT FROM AUTHOR]
Published
2011
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