The STATIMAT 4U is a high-performance automatic tester for tensile properties and linear density of very coarse and high-tenacity yarns. Designed to reliably handle forces of up to 5000 N, the STATIMAT 4U delivers accurate and reproducible results even when testing demanding technical yarns made from high-tenacity polymers such as Aramid or UHMWPE. This makes it a robust and reliable solution for quality assurance in filament yarn production and technical textile applications.

Further examples of materials that STATIMAT 4U is ideally suited for include sewing threads, tire cords, IDY or monofilaments. Thanks to its flexible load-cell system, the same instrument can also be used to test regular textile yarns. This versatility makes the STATIMAT 4U an excellent choice also for research and development laboratories, where maximum flexibility and a wide testing range are required.

Specially engineered to exceed the capabilities of conventional testers, the STATIMAT 4U combines exceptional mechanical stability with high-capacity force measurement and advanced clamping technology. This includes heavy-duty clamps with integrated bollards as well as an optional rotary clamp for twist insertion prior to testing. These features ensure a clearly defined test setup and improved comparability of breaking force, elongation, and work-to-rupture values, fully aligned with established standard test methods.

Integrated Yarn Twisting Prior to Testing 

The insertion of twist into the yarn prior to tensile testing is particularly important for untwisted technical filament yarns. Compared with tensile tests performed on untwisted yarns, this approach offers several key advantages:

• Improved test definition and reduced scatter in breaking force, elongation at break, and work to rupture. Untwisted multifilament yarns typically fail filament by filament, whereas twisted yarns tend to break simultaneously.

• Closer-to-practice testing conditions, as most technical yarns are twisted before further processing and during actual use.

• Compliance with standardized test methods, as numerous standards recommend or require tensile testing after twist insertion, including ASTM D 885, Note 9, ASTM D 2256, BISFA standards for Polyester- and Polyamide filament yarns, and ISO 2062.

• Possibility for twist optimization, allowing material properties such as tenacity, elongation, work to rupture, modulus, and reference force and elongation values to be evaluated as a function of twist. This enables determination of the optimum twist level for specific applications.

Textechno also offers a range of further STATIMAT instruments, each designed to address specific materials or testing requirements, including STATIMAT DS, STATIMAT ME+, and STATIMAT MEL+.