Paper e.g. sanitary paper, rigidity measuring method, involves recording sound of paper during tearing by tear tester, and analyzing recorded sound to measure percentage of presence of characteristic frequencies of tearing

摘要

The method involves tearing a sample of a paper (2) e.g. sanitary paper, with predetermined force by a Adamel-Lhomargy ED 20 model(RTM: tear tester) (1), and recording the sound produced during tearing by a recording software e.g. Nero wave editor(RTM: Ahead recording software). The sound is digitized by the software for obtaining a digital recording with a preset period. The sound is analyzed in order to measure a percentage of the presence of characteristic frequencies of tearing, where the percentage is an indicator of paper rigidity. An independent claim is also included for a device for measuring rigidity of a paper or fibrous cellulose product, comprising a tear tester.