Patent ID: 6386027
Filing Date: 2002-05-14
Classification: G01N

Abstract:
A method of measuring z-directional tensile strength of a sample (2) of paper or board in a direction perpendicular to a surface thereof, comprising:adhering double-sided pressure-sensitive adhesive tape (5, 5â€²) to two opposite surfaces of the sample (2) so as to obtain a sandwich structured sample web (3); bringing on each of the two opposite surfaces of the sample web (3), a tensile strength tester platen (10, 10â€²) in contact with a free surface of the double-sided pressure-sensitive adhesive tape (5, 5â€²); fastening, on each of the two opposite surfaces of the sample web (3), the tensile strength tester platen (10, 10â€²) to the free surface of the double-sided pressure-sensitive adhesive tape (5, 5â€²); pulling apart the tensile strength tester platens (10, 10â€²) by use of a tensile force; and measuring the tensile force necessary to break the sample (2) in a plane between the two opposite surfaces of the sample; wherein a plurality of z-directional tensile strength tests are performed at separate locations on a continuous sample web (3).