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TAPPI - T 489 OM

Bending resistance (stiffness) of paper and paperboard (Taber-type tester in basic configuration)

active, Most Current
Organization: TAPPI
Publication Date: 1 January 2022
Status: active
Page Count: 6
scope:

This test method covers a procedure used to measure the resistance to bending of paper and paperboard.

This test method is used to determine the bending moment required to deflect the free end of a 38 mm (1.5 in.) wide vertically clamped specimen 15° from its center line when the load is applied 50 mm (1.97 in.) away from the clamp. The resistance to bending is calculated from the bending moment.

TAPPI T 566 "Bending Resistance (Stiffness) of Paper (Taber-Type Tester in 0 to 10 Taber Stiffness Unit Configuration)" describes a modification of the instrument described in this test method for measurements in the 0 to 10 Taber stiffness range only, and which requires a smaller test specimen. The modified procedure may be recommended for papers which are low in grammage, highly flexible, or both.

Test results obtained using modifications of the basic Taber-type instrument such as that described in TAPPI T 566 "Bending Resistance (Stiffness) of Paper (Taber-Type Tester in 0 to 10 Taber Stiffness Unit Configuration)" have been reported to be as much as 40% different from those obtained using this test method, and such modifications must not be used when this test method is specified.

Other procedures for measuring bending resistance include TAPPI T 535 "Bending Stiffness of Paper and Paperboard (Resonance Length Method)"; TAPPI T 543 "Bending Resistance of Paper (Gurley-Type Tester); TAPPI T 556 "Bending Resistance of Paper and Paperboard by Single-Point Bending Method"; and TAPPI T 836 "Bending Stiffness, Four Point Method." TAPPI T 535 has been classified as Classical.

Document History

T 489 OM
January 1, 2022
Bending resistance (stiffness) of paper and paperboard (Taber-type tester in basic configuration)
This test method covers a procedure used to measure the resistance to bending of paper and paperboard. This test method is used to determine the bending moment required to deflect the free end of a...
January 1, 2015
Bending resistance (stiffness) of paper and paperboard (Taber-type tester in basic configuration)
This test method covers a procedure used to measure the resistance to bending of paper and paperboard. This test method is used to determine the bending moment required to deflect the free end of a...
January 1, 2013
Bending resistance (stiffness) of paper and paperboard (Taber-type tester in basic configuration)
This test method covers a procedure used to measure the resistance to bending of paper and paperboard. This test method is used to determine the bending moment required to deflect the free end of a...
January 1, 2008
Bending resistance (stiffness) of paper and paperboard (Taber-type tester in basic configuration)
A description is not available for this item.
January 1, 2004
Bending resistance (stiffness) of paper and paperboard (Taber-type tester in basic configuration)
A description is not available for this item.
August 19, 1999
Bending Resistance (Stiffness) of Paper and Paperboard (Taber-Type Tester in Basic Configuration)
A description is not available for this item.
January 1, 1992
Stiffness of Paper and Paperboard (Taber-Type Stiffness Tester)
A description is not available for this item.

References

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