Tensile strength is one of the basic mechanical properties of a material. The highest value that a material can withstand without breaking under a certain tension is called breaking strength. The rupture point is the moment when the material ruptures precisely after deformation. Strength is a science. It examines the behavior of objects against a number of external factors and internal forces caused by them. The strength of an object depends on its microstructure. Engineering studies are aimed at strengthening this microstructure.

A number of mechanical properties are also emphasized in the production of paper and cardboard. Wet breaking strength is one of them. Grinding degree, wet pressing processes and fillers used in production stages affect the strength of products.

Authorized laboratories carry out tests and analyzes in order to determine the wet breaking strength of paper products within the scope of specific tests. These studies are based on standards published by domestic and foreign organizations. The standards considered to determine the wet tensile strength are:

• TS EN ISO 12625-5 Tissue paper and its products - Part 5: Wet tensile strength test

This standard specifies a test method for determining the wet tensile strength of soft tissue and similar products after wetting using a rupture tester operating at constant speed elongation.

• TS 5163 Determination of wet tensile strength after immersion in paper and paperboard

This standard specifies a test method for determining the tensile strength of paper and paperboard after being kept in water for a suitable period of time.

• TS 3121-1 ISO 1924-1 Paper and cardboard - Determination of tear properties - Part 1: Constant speed loading method
• TS EN ISO 1924-2 Paper and cardboard - Determination of rupture properties - Part 2: Constant speed drawing method