Paper and board — Determination of resistance to bending — Part 2: Taber-type tester
Paper and board — Determination of resistance to bending — Part 2: Taber-type tester
This document specifies procedures to measure the bending resistance of paper and paperboard using a Taber-type tester. This document is used to determine the bending moment required to deflect the free end of a 38 mm wide vertically clamped specimen by 15° when the load is applied at a bending length of 50 mm. For boards that tend to be permanently deformed if bent through 15°, the half bending angle, i.e. 7,5°, can be used. The bending resistance is expressed in terms of the bending moment and parameters set by the manufacturer of the Taber-type tester. The method is primarily used for papers with a high grammage. NOTE This document does not cover the low-range version of the Taber-type instrument that uses a bending length of 10 mm (see Reference [5]).
ISO 2493-2:2020 specifies a laboratory method to determine the resistance to bending of paper and paperboard using a Taber‑type tester. The standard defines the test geometry and procedure to measure the bending moment required to deflect a 38.0 mm wide, vertically clamped specimen by 15° (or 7.5° for boards that permanently deform). Results are reported as a bending moment (mN·m) or in Taber stiffness units (convertible to SI units).
Keywords: ISO 2493-2, Taber‑type tester, bending resistance, paper testing, paperboard stiffness, bending moment, Taber stiffness units
Стандарты, упомянутые в описании
Practical benefits include repeatable stiffness measurement, comparability across labs (when conditioning and calibration requirements are met), and a normalized index to account for grammage.
Use ISO 2493-2 when you need a standardized, reproducible Taber‑type measurement of bending resistance for paper and board, especially for heavier grades where bending stiffness is a key performance attribute.