ASTM D2256: which instrument fits and how to decide

The Automatic Single Yarn Strength Tester (TNG1021) is the appropriate instrument for compliance with ASTM D2256, as it meets the required specifications for testing single yarn strength.

Instrument Selection Criteria for ASTM D2256 Compliance

When selecting an instrument for ASTM D2256, it is essential to focus on the test range and accuracy, as these parameters directly influence the ability to measure the tensile strength of single yarns within the specified limits. The ASTM D2256 standard requires the determination of the breaking strength of single yarns, which involves applying a controlled tensile force until the yarn breaks. The TNG1021 model is specifically designed for this purpose, offering a test range of 20cN to 6000cN, which aligns with the force requirements for various types of yarns. The accuracy of ≤ 1% F. S ensures that the measurements are reliable and repeatable, meeting the precision demands of the standard.

Key Specifications of TNG1021 and Their Relevance to ASTM D2256

The TNG1021 model includes a sampling range of 0 to 9 meters, which is crucial for handling different lengths of yarn samples without the need for frequent adjustments. This feature supports the ASTM D2256 method, which may require testing yarns of varying lengths. Additionally, the pre-tension load of 0 to 100cN, adjustable, allows for precise control over the initial tension applied to the yarn, ensuring consistent test conditions. The elongation range of 800mm is another important specification, as it accommodates the deformation of the yarn during the test, providing accurate data on the material's behavior under stress. The gauge length options of 250mm (stretching rate 220%) and 500mm (stretching rate 160%) offer flexibility in testing different yarn types, ensuring that the instrument can adapt to the specific requirements of the ASTM D2256 standard.

Instrument Capabilities and Standard Compliance

The TNG1021 model is equipped with a gauge length of 250mm and 500mm, which are critical for measuring the breaking strength of single yarns according to ASTM D2256. The stretching rates of 220% and 160% correspond to the elongation characteristics of different yarn materials, ensuring that the test results are representative of the material's performance. These specifications are essential for meeting the standard's requirements, as they allow for accurate measurement of the yarn's tensile properties under controlled conditions. The combination of these features ensures that the TNG1021 model is suitable for use in laboratories that need to perform ASTM D2256 tests, providing reliable and repeatable results.

Instrument models referenced

• TNG1021 Automatic Single Yarn Strength Tester (Bursting / Tear / Tensile Strength Testing). Published specifications include Test range 20cN ~ 6000cN; Accuracy ≤ 1% F. S; Sampling range 0 ~ 9m.