BS EN ISO 9073-4:2021 pdf free.Nonwovens – Test methods Part 4: Determination of tear resistance by the trapezoid procedure. Marking of a trapezoid on a test specimen. Clamping of the non-parallel sides of the trapezoid in the jaws of a tensile testing machine. Application of a continuously increasing extension to the test specimen in such a way that a tear […]

Continue reading »