ISO 1924-2:2008 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 (20 mm/min). ISO 1924-2:2008 also specifies equations for calculating the tensile index, the tensile energy absorption index and the modulus of elasticity. Testing in conformance with ISO 1924-2:2008 always includes the measurement of tensile strength. Measurement or calculation of other properties is subject to agreement between the parties concerned. ISO 1924-2:2008 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.
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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 Calibration of the tensile testing machine (normative)
ISO 186:2002 Paper and board -- Sampling to determine average quality
ISO 187:1990 Paper, board and pulps -- Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples
ISO 534:2005 Paper and board -- Determination of thickness, density and specific volume
ISO 186:2002 Paper and board -- Sampling to determine average quality
ISO 187:1990 Paper, board and pulps -- Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples
ISO 534:2005 Paper and board -- Determination of thickness, density and specific volume
ISO 536:1995 Paper and board -- Determination of grammage