Pappersteknik

Kommittébeteckning: SIS/TK 157 (Massa och papper)
Källa: CEN
Svarsdatum: den 4 apr 2023
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This document specifies a test method for the determination of the wet tensile strength of tissue paper and tissue products after soaking with water, using a tensile-strength-testing apparatus operating with a constant rate of elongation.
Currently, two types of tensile-strength-testing apparatus are commercially available, one where the test piece is positioned vertically and, for the other, horizontally. This document applies for both.
For vertical tensile-strength-testing apparatus, a device which is held in the lower grip of the tensilestrength- testing apparatus, called a Finch Cup, is used to achieve the wetting. For horizontal tensilestrength-
testing apparatus, the soaking device is placed between the clamps.
In cases where impurities and contraries have to be determined, ISO 15755[6] applies for these detections in tissue paper and tissue products.