Foldur Kraft paper folding endurance

Table III. Number of Times Folding Endurance Increased for Foldur Kraft Paper Samples for the Relative Humidity Range of 20% to 80%...

The above results agree with those of the folding endurance test carried out at 100°C—i.e., the Allied paper is most stable, the Foldur Kraft least stable, and the JCPA-60 is intermediate. 

The cured sheets were conditioned at 23 °C and 50% relative humidity. MIT folding endurance was run on 1.5-cm wide strips at 0.5 kg load. Tensile was taken on the same width strip. Eight strips were run machine direction and eight cross direction. As mentioned by Raff et al. (4,5), standard deviation and coefficient of variation were increased greatly in the treated plasticized paper for example untreated Foldur Kraft gave ... 

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