TENSILE – STRENGTH – STRETCH – TEA – STIFFNESS
Purpose of the test
This test is performed to determine the tensile strength, strain at break, tensile energy absorption, TEA, and tensile stiffness of paper.
Procedure
Operate the instrument in accordance with ISO 1924-3 and the manufacturer’s instructions.
Leave the samples exposed for 24 h to 23°C and 50% R.H., according to ISO 187.
From each test piece cut one test strip 15,0±0,1 mm width. The test span must be 100±1 mm.
Report 10 measures, Tensile Strength in kN/m, Strain at break in %, Tensile Energy Absorption in J/m2 and Tensile stiffness in kN/m, their mean and standard deviation calculated to 3 significant figures.
ISO 1924-3
Nr. of samples
12 test pieces per level
Special size A4
Levels
Tensile Strenght:
Level 1: 2.0÷3.0 kN/m
Level 2: 6.0÷8.0 kN/m
Level 3: 14.0÷16.0 kN/m
Tensile Strain at Break (stretch):
Level 1: 3.0÷6.0 %
Level 2: 1.0÷2.5 %
Level 3: 1.0÷3.5 %
Tensile Energy Absorption:
Level 1: 50÷90 J/m²
Level 2: 50÷90 J/m²
Level 3: 150÷250 J/m²
Tensile Stiffness:
Level 1: 150÷350 kN/m
Level 2: 700÷1200 kN/m
Level 3: 1200÷2000 kN/m
Reporting
Report 10 valid results of measurements, Tensile Strength in kN/m, Strain at break in %, Tensile Energy Absorption in J/m² and Tensile stiffness in kN/m, their mean and their standard deviation. All to three significant digits.
CEPI test 2.18
2.18(a); strength
2.18(b); stretch
2.18(c); TEA
2.18(d); stiffness