You may have come across furniture fabric testing, but do you really understand the importance of seam fatigue testing? In furniture manufacturing and automotive interiors, the strength of fabric seams is a key factor in determining product lifespan. Under long-term repeated stress, seams may break due to dynamic fatigue, leading to fabric delamination, fraying, and even structural failure. How can we accurately assess seam durability? GT-KB40 Seam Dynamic Fatigue Tester is professional equipment for assessing the durability of seams in upholstered furniture such as sofas and car seats.
In this article, we will analyze the working principle and operation procedure of GT-KB40 Seam Fatigue Tester in detail.
Working Principle of GT-KB40 Seam Fatigue Tester
The Sewn Seam Dynamic Fatigue Tester measures and visually evaluates yarn slippage and other types of failures in the three most commonly used The dynamic seam fatigue tester is to measure of or visual evaluation of yarn slippage and other types of failures in the three most commonly used upholstery seams - warp sewn to warp (wale to wale), filling sewn to filling (course to course), and warp sewn to filling (wale to course).
Stress on the seam is created through cyclic impact and penetrating loads that fatigue the seam structure.
GT-KB40 Seam Fatigue Tester for Fabric Operating Procedures
Specimen Preparation
Cut a standard specimen (including seams), ensuring that the seam line is centered on the foam pad (279.5 x 228 x 178 mm).
Fix the foam pad in the specimen slot, align the fixture with the slot using the locating pin, press and lock the front fastener.
Equipment Alignment
Use a straightedge to confirm that the distance between the specimen surface and the impact hammer is 150mm, and fine-tune the height through the four adjusting nuts at the bottom.
Connect ≥0.6MPa gas source and AC220V power supply, start the dynamic seam fatigue tester and perform system zeroing.
Test execution
Select the automatic mode, close the idle station, set the number of impacts (e.g. 5000 times).
Pull out the fixed pin of the impact hammer, click the start button, the equipment will automatically run to the set number of times and then stop.
Evaluation of results
When the impact reaches the set number of times, the machine stops automatically. Observe the seam condition on the surface of the sample.
FAQ
Q: What types of seams can the Seam Fatigue Tester for Fabric test? A: Three main types of seams are supported: warp to warp, weft to weft, and warp to weft.
Q: How are the test results presented? A: The dynamic seam fatigue testing machine can output data such as seam slippage and breaking strength decay curve.
Q: What is the impact speed of GT-KB40 Seam Fatigue Tester ? A: 0.4±0.03 Hz (25±2 cycles per minute)
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