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The zero-span tensile test explained

The zero-span tensile test provides information on the fiber strength of paper and is performed to TAPPI T 231. A tensile load is applied to a test strip with a grip-to-grip separation approaching zero. This causes most of the load to be applied to the cellulose fibers and less to the total fabric of the paper.

Zero-span test

Zero-span tensile test with Zwick

  • The zero-span tensile test is generally carried out using single-purpose instruments which are correspondingly complex and expensive.
  • For occasional tests it is worth making use of the modular 'building block' system of specimen grips and supplementary devices.
  • The exact position of the two specimen grip units relative to each other must first be set (once only) with reference to angular position and horizontal position. A mechanical add-on kit is available for this.
  • As the specimen grips must comply with minimum accuracy requirements, pneumatic grips are needed.
  • The jaws required protrude upwards from the base of the grips, allowing a free length of around 0.1 mm.

Kontakt

ZR Sverige AB
Tel.  +46 (0)31 933 480
E-Mail  info@zwick.se
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