| 摘要 |
<p>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.</p> |
