International Organization for Standardization (ISO)
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ISO 11093-7:2011
Scope
This part of ISO 11093 specifies a method for the determination, by the three-point method, of the flexural modulus of cylindrical paper and board cores which meet the following criteria:
— internal diameter: 50 mm to 350 mm;
— minimum wall thickness: 0,05 × internal diameter, but not less than 10,0 mm;
— minimum length of core: 10 × internal diameter, but not less than 1000 mm.
If the flexural modulus has to be used for the calculation of a paper core’s natural frequency, ISO 11093-8[2] applies instead of this International Standard.
ISO 11093-7:2011 Referenced Document
ISO 11093-1 Paper and board - Testing of cores - Part 1: Sampling
ISO 11093-3 Paper and board - Testing of cores - Part 3: Determination of moisture content using the oven drying method
ISO 11093-7:2011 history
2011ISO 11093-7:2011 Paper and board - Testing of cores - Part 7: Determination of flexural modulus by the three-point method
1997ISO 11093-7:1997 Paper and board - Testing of cores - Part 7: Determination of flexural modulus by the three-point method