TAPPI T494 testing
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TAPPI T494 | Paper and Paperboard| Tension Testing

TAPPI T494 is a tensile test used to determine the tensile properties of paper and paperboard. It is similar to ASTM D828, but with minor differences in regards to suggested grip geometry and test speed. For consistent results, users should pay careful attention when aligning the specimens in the grips. ADMET software can easily provide all of the required calculations in this test.

Before conducting TAPPI T494, it is important to read the entire specification in the relevant TAPPI publication.

TAPPI T494 | Paper and Paperboard| Tension Testing

  1. Prepare and condition the test specimens according to the dimensions and guidance described in the test standard.
  2. Move the grips to the required grip separation and insert the specimen into the grips. Carefully align the specimen in the direction of the applied force and ensure there is no slack in the material. An alignment jig may be beneficial.
  3. Note that the pressure applied to the grip clamping surfaces could play a large role in testing results. Trials may be needed to determine optimal grip pressure for the material being tested. Pneumatic grips with adjustable pressure settings can help provide for more easily repeatable tests.
  4. Apply load to the specimen at the constant rate of grip separation defined in the standard.
  5. Continue test until specimen failure, while ensuring that the specimen does not slip in the jaws or break at the clamping area.
Calculations:
  • Tensile Strength at Break
  • Elongation at Break
  • Tensile Energy Absorption
  • Modulus of Elasticity

TAPPI T494 | Paper and Paperboard| Tension Testing

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