2-point-bending stiffeness

Article number:
530072
Norm:
DIN 53121
DAkkS - Deutsche Akkreditierungsstelle D-PL-17375-01-00

The width-related bending stiffness S describes the resistance of a specimen to bending. In the elastic deformation range, it is the product of the modulus of elasticity E valid for bending and the area moment of inertia I of the sample.

The bending stiffness is an important parameter for the further processing of paper and board. The stiffness or flexibility of the paper can have a detrimental effect on processing operations in packaging machines and lead to malfunctions.

The determination of the width-related bending stiffness S is carried out, among other things, according to DIN 53121, the two-point method.

For this, the specimen clamped at one end is stressed at a distance l by a force F acting perpendicular to the surface of the specimen. The tests are carried out with a clamping length of 50 mm and a bending angle of 5°. The specimen width is 38 (± 0.2) mm. 10 individual values are determined per test direction, 5 measurements each against the upper side and 5 measurements against the lower side, and an average value is calculated from these. The bending stiffness is given in Nmm.

More Trainings

  • Sicher Kleben und Etikettieren auf Papier und Karton

    Lernen Sie das Zusammenspiel der Einzelkomponenten sowie Prüfmöglichkeiten von Klebstoffen und Etiketten mittels einer Vielzahl von Messmethoden kennen. Der Kurs vermittelt theoretische Grundlagen zu Klebstoffen und deren Funktionsweise. Zudem werden wichtige Klebstoffsysteme und Haftverbunde vorgestellt und deren spezifische Eigenschaften behandelt. Weiterhin werden lebensmittelrechtliche Aspekte, Recyclingfähigkeit und Beispiele aus der Praxis näher beleuchtet. Begegnen Sie zahlreichen Anwendungsfeldern und schauen Sie mit uns in die Zukunft des Klebens und Etikettierens.

    Show more:Sicher Kleben und Etikettieren auf Papier und Karton
  • PTS Coating Symposium 2023

    The PTS Coating Symposium is the international meeting point for experts from industry, research and development to learn about and discuss the latest innovations in coating and surface upgrading of paper and board materials. In addition to a well-selected scientific programme, you will have the opportunity to expand your network and meet interesting sponsors and exhibitors.

    Show more:PTS Coating Symposium 2023

More Testing Services