Introduction of Horizontal Tensile Tester

TST-H Horizontal Tensile Tester is a constant-rate-of-elongation equipment which is used for the determination of the tensile strength, stretch at maximum force and tensile energy absorption, tensile stiffness of paper,paperboard, tissue paper and tissue products. It also calculating the tensile index and the tensile energy absorption index.

Terms

tensile strength

maximum tensile force per unit width that a test piece will withstand before breaking.

tensile index

tensile strength divided by grammage.

stretch at maximum force

ratio of the elongation of a test piece, over its initial length, at the moment when the maximum tensile force is reached during a tensile test. Stretch at maximum force is expressed as a percentage of the initial test span length.

tensile energy absorption TEA

amount of energy absorbed per unit surface area of a test piece while being stretched under application of tensile force, until the onset of break (the moment of maximum tensile force)

tensile energy absorption index

tensile energy absorption divided by grammage

Test Principle

A test piece of given dimensions, is stretched to break at a constant rate of elongation using TST-H Horizontal Tensile Tester that measures and records the tensile force as a function of the elongation of the test piece.

From the recorded data, the tensile strength, the corresponding stretch at maximum force and the tensile energy absorption can be calculated.

Specifications

Standards

GB/T12914, GB/T 24328.3, GB/T 24328.4, GB/T 24328.5, QB/T5560, ISO 1924-1, ISO 1924-2, ISO 1924-3, ISO 12625-4, ISO 12625-5, TAPPI T494

FAQs

1. What is Tensile strength?

   The maximum tensile force developed in a test specimen before rupture on a tensile test carried to rupture under prescribed conditions. Tensile strength (as used here) is the force per unit width of test specimen.

2. What is Stretch?
   The maximum tensile strain developed in the test specimen before rupture in a tensile test carried to rupture under prescribed conditions. The stretch (or percentage elongation) is expressed as a percentage, i.e., one hundred times the ratio of the increase in length of the test specimen to the original test span.

3. What is Tensile energy absorption (TEA)?
   The work done when a specimen is stressed to rupture in tension under
   prescribed conditions as measured by the integral of the tensile strength over the range of tensile strain from zero to maximum strain. The TEA is expressed as energy per unit area (test span width) of test specimen.

4. What is Tensile stiffness?
   The ratio of tensile force per unit width to tensile strain within the elastic region of the tensile-strain relationship. The elastic region of the tensile-strain relationship is the linear portion of the load-elongation relationship up to the elastic limit. The elastic limit is the maximum tensile force above which the load-elongation relationship departs from linearity. (Tensile stiffness is numerically equivalent to E·t, where E is the modulus of elasticity and t is sample thickness.)

5. What is Breaking length?
   The calculated limiting length of a strip of uniform width, beyond which, if such a strip were suspended by one end, it would break of its own weight.

6. What is Tensile index?
   The tensile strength in N/m divided by grammage.

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