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Paper and board. Determination of fracture toughness. Constant rate of elongation method (1,7 mm/s)
This Technical Specification describes a method for determining the fracture toughness of paper and board using a tensile testing machine operated with a constant rate of elongation.
It also describes the determination of the fracture strength and fracture strain of a notched paper web with an assigned standard web geometry. This information is used to rank the fracture properties of paper materials.
This Technical Specification is applicable to all kinds of paper and paperboard, except for certain special grades, such as creped paper and other paper materials that significantly deviate from exhibiting monotonically decreasing tangential stiffness during tensile testing.
This Technical Specification does not apply to corrugated fibreboard.
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