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Experimental principle of manual tear strength tester

Author:QINSUN Released in:2023-10 Click:29

The manual tear strength tester is a testing equipment independently developed and produced by qisnun Precision Electromechanical Technology Co., Ltd. It is a manual type used to test the impact tear strength of textiles, woven fabrics, non-woven fabrics and coated fabrics. . , can also be used to test the bursting strength of silk, cotton, paper, cardboard and single-layer and multi-layer corrugated board.

Meets standards:

GB3917.1, FZ/T6006-1991, FZ/T75001-1993-1999, ASTMD1424-96, ASTMD5734-96

Experimental principle:

When the single stitching method is used to tear, a stress-bearing triangle is formed at the tear of the fabric. When the stressed weft yarns in the sample gradually separate from top to bottom, the warp yarns that are not directly stressed begin to avoir some relative slip with the stressed weft threads and gradually move closer together, forming an approximate triangular area. At the bottom of the tear opening, the warp threads of the stressed triangle are jointly subjected to tension. Among them, the front warp yarn near the bottom of the triangle is under stress, and the stress of other warp yarns gradually weakens according to a certain load gradient.

Due to the frictional resistance between the wires, slippage is limited. When sliding, the tension of the warp threads increases rapidly, and the deformation and elongation also increase sharply. When the front warp yarn which forms the base of the stressed triangle is stretched to the elongation at break, this warp yarn breaks and the stress state of the second warp yarn immediately changes to the front state breakage of the front warp thread. Repeatedly, the chain threaddon\'t continue. Continuous fractures occur one after another, forming a fracture surface that resembles a knife cut. It can be seen that when tearing with a single stitching method, the broken thread is a thread in a tension-free system, and the direction of the pulling force is perpendicular to the origin.al axis of the broken thread. A special pendulum can increase up to 10% for testing thick textiles. Weight of 64,000 mN, while also using a robust sample cutter.

As an enterprise integrating R&D, manufacturing, sales, training and service, Shanghai Fanbiao Textile Testing Technology Co., Ltd. is committed to continuously providing more testing instruments to the market and providing textiles, long-term testing. instruments for leather, combustion, automobile interior materials, environmental climate aging, masks, etc. can also accept a personnon-standard alization. Targeted testing can be carried out according to customer requirements before purchase to ensure that the purchased instruments are suitable.