ASTM D2256 tester models and their published ranges

The Automatic Single Yarn Strength Tester (TNG1021) is designed to meet the requirements of ASTM D2256, which specifies the procedures for determining the tensile strength of yarns. This article compares the TNG1021 with other instruments that are relevant to the standard, focusing on their specifications and how they support the testing process.

Test Range and Accuracy

The TNG1021 has a test range of 20cN to 6000cN, which is essential for accurately measuring the tensile strength of various yarn types, from fine to heavy-duty fibers. This wide range ensures that the instrument can handle different materials without needing frequent recalibration. The accuracy of the TNG1021 is specified as ≤ 1% F. S, which means that the results are reliable and consistent, meeting the precision requirements of ASTM D2256. These specifications are critical for ensuring that the test data is both accurate and repeatable, which is a fundamental aspect of the standard.

Sampling and Pre-Tension Load

The sampling range of the TNG1021 is 0 to 9 meters, allowing for the testing of long yarn samples without the need for frequent sample changes. This feature supports the efficiency and continuity of the testing process, as required by ASTM D2256. The pre-tension load can be adjusted between 0 and 100cN, providing flexibility in applying the appropriate initial tension to the yarn. This adjustability ensures that the test conditions are optimized for the specific material being tested, which is a key requirement of the standard.

Elongation and Gauge Length

The elongation range of the TNG1021 is 800mm, which allows for the measurement of how much the yarn can stretch before breaking. This is important for determining the elongation properties of the material, which are part of the tensile strength evaluation specified in ASTM D2256. The gauge length options are 250mm with a stretching rate of 220% and 500mm with a stretching rate of 160%. These settings enable the user to select the appropriate gauge length based on the yarn type and the desired test parameters, ensuring that the test results are representative of the material's true tensile characteristics.

Compliance and Standard Support

The specifications of the TNG1021 are directly aligned with the requirements of ASTM D2256. The test range, accuracy, sampling capability, and gauge length settings all contribute to the instrument's ability to provide reliable and standardized test results. By adhering to these specifications, the TNG1021 ensures that the testing process is both efficient and compliant with the established industry standards.

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.