BS EN ISO 1924-2:2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Calibration and adjustment of apparatus
7 Sampling and preparation of test pieces
   7.1 Sampling
   7.2 Conditioning
   7.3 Preparation of test pieces
8 Procedure
9 Calculation and report
   9.1 General
   9.2 Tensile strength
   9.3 Tensile index
   9.4 Strain at break
   9.5 Tensile energy absorption
   9.6 Tensile energy absorption index
   9.7 Modulus of elasticity
10 Precision
   10.1 General
   10.2 Repeatability
   10.3 Reproducibility
11 Test report
Annex A (normative) - Calibration of the tensile
        testing machine
Bibliography

Describes a method for measuring the tensile strength, strain at break and tensile energy absorption of paper and board, using a testing machine operating at a constant rate of elongation (20 mm/min).

This part of ISO1924 specifies a method for measuring the tensile strength, strain at break and tensile energy absorption of paper and board, using a testing machine operating at a constant rate of elongation (20mm/min). This part of ISO1924 also specifies equations for calculating the tensile index, the tensile energy absorption index and the modulus of elasticity.

Testing in conformance with this part of ISO1924 always includes the measurement of tensile strength. Measurement or calculation of other properties is subject to agreement between the parties concerned.

This part of ISO1924 is applicable to all papers and boards, including papers with a high strain at break if the results are within the capacity of the testing machine. It also applies to the components of corrugated board but not, however, to corrugated board itself.

This part of ISO1924 is not applicable to tissue paper and tissue products for which ISO12625-4^[2] is applicable. For the determination of tensile properties of laboratory sheets, ISO5270^[3] is recommended.