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Manual tear strength tester single seam tear principle

Author:QINSUN Released in:2023-08 Click:100

The manual tear strength tester is a test equipment independently developed and produced by our company qisnun Precision Electromechanical Technology Co., Ltd. This is a cost-effective and comprehensive after-sales service. It is used to test the impact of textiles, woven fabrics, non-woven fabrics and coated fabrics. The strength of tears.

Test Standard:

ASTM D295, D752, D1424, D1922, D5734, TAPPI T414, T496, BS 4253, BS 4468, CPPA D.9, DIN 53862, 53128 , ISO 1974, 9290, EN21974, SCAN P11

Test principle:

When the single seam method is torn, the fabric will tear to form a triangle of force. As the tensioned weft yarns of the sample are gradually pulled apart from top to bottom, the warp yarns not directly under tension begin to slip relative to the tensioned weft yarns and gradually come together to form a zone approximate triangular. At the bottom of the tear opening, the warp threads in the stressed triangle are under tension together, and the wa rp thread near the bottom of the triangle bears the greatest force, and the force on the other warp threads weakens gradually according to a certain load gradient.

Due to the frictional resistance between the threads, slippage is limited. When sliding, the chain tension increases rapidly and the strain elongation also increases sharply. When the first warp yarn constituting the base of the stressed triangle is stretched to break the elongation, this warp yarn breaks, and the stressed state of the second warp yarn is immediately transformed into the state before the breaking of the warp yarn. front warp, thus repeated, the warp yarn yarn one The roots are continuously broken one by one, forming a fracture surface like a knife cut. It can be seen that when the simple is torn, the broken wire is the system wire without tension, and the direction of the tensile force is perpendicular to the original axis of the broken wire. 64,000 mN weight, also with heavy duty sample cutters.

Shanghai Fanbiao Textile Testing Technology Co., Ltd., as an enterprise integrating R&D, manufacturing, sales, training and service, is committed to continuously providing more test instruments in the market, providing long-term textiles, leather test instruments, combustion, automotive interior materials, environmental weather aging, masks and protective clothing, etc., can also accept non-standard customization. Before purchasing, we can carry out targeted tests according to customer requirements to ensure that the purchased instruments are applicable.