Testing Standard:
TAPPI T494 Tensile Properties of Paper and Paperboard (Using Constant Rate of Elongation Apparatus)
Standard Number
TAPPI T494
Standard Title
Tensile Properties of Paper and Paperboard, Test Method
Overview for TAPPI T494 Tensile Properties of Paper:
TAPPI T494 Test Method details the method of obtaining the maximum tensile force per unit width measurement of paper. Ideal for identifying physical strength issues and resistance to web breaking. TAPPI T494 is a standard test method for determining the tensile properties of paper and paperboard using constant rate of elongation apparatus. This test is particularly useful in evaluating the strength and durability of paper products.Â
The test involves cutting a rectangular sample of the paperboard or paper product and clamping it between two jaws of a testing machine. The jaws then move apart, with one end of the sample being held stationary while the other end is pulled at a constant rate of elongation. The force required to stretch the sample until it breaks is recorded, as well as the elongation or stretch percentage of the sample at break.
The test can provide valuable information on the tensile strength, elongation, and elastic modulus of the paper product. These properties can be used to determine the suitability of the paper for a particular application, such as packaging or printing.
TAPPI T494 is just one of several standardized test methods used to evaluate paper products. Other tests include the burst strength test, Cobb moisture test, and tear strength test, among others. Purple Diamond Testing offers TAPPI T494 Tensile Properties of Paper and Paperboard as part of our packaging compliance and validation services.
Rationale for TAPPI T494 Tensile Properties of Paper:
Data collected shows the quality of the fiber strength, fiber length, and bonding of paper which could find possible issues in meeting expectations when combined into corrugated boxes. This test method can be used to compare different paper grades, virgin fibers versus recycled fibers, manufacturers, and more. It’s also possible to evaluate how the paper’s tensile strength changes when exposed to different environmental conditions such as high humidity.
Key Points:
- Determines desired paper strength and aids in comparison testing
- Optimizes costs by reducing overspecked paper
- Validates recycled material strength
- Verifies paper strength to manufacturer’s specifications
Related Standards:
- ASTM D828 – Standard Test Method for Tensile Properties of Paper and Paperboard Using Constant-Rate-of-Elongation Apparatus
- ISO 1924-2 – Paper and Board – Determination of Tensile Properties – Part 2: Constant Rate of Elongation Method
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