The tear capacity of the fabric is one of the most important indicators of its physical properties, and different fabrics have different forms of tear damage during use. Depending on the damage phenomenon of fabrics in actual use, different test methods have been designed to characterize the tear properties of fabrics. The main methods of testing the tear properties of fabrics are: hammer tear, trouser tear (single seam), trapezoid tear, tongue tear (double seam) and wing tear, drop hammer fabric tear tester It is the main test tool. Precision Electromechanical Technology Co., Ltd. is the manufacturer. Customers in need are welcome to inquire in time. Our RD engineers take corduroy as an example to explain the method of testing fabrics with the Drop Hammer Fabric Tear Tester. Tear performance.
ASTM D1424 D689; NEXT 17;MS P29;BE EN ISO 13937 4674;BS 4468;DIN EN 21974;IOS 3917.1;ISO 1974
1. Tear force range: hammer A: 0~16N; Hammer B: 0~32N; Hammer C: 0~64N;
2. Force measurement accuracy: ≤±1 division;
3. Test sample size : 100(L)×63(W)mm;
4. Incision length: 20±0.2mm;
5. Tear length: 43mm;
6. Combination test weights meet different test requirements;
7. Large test ranges of 200cN, 400cN, 800cN, 1600cN, 3200cN, 6800cN, 13600cN and 30000cN; , etc. The test units are MN, CN, N, G, KG, OZ, LB optional.
Corduroy, also known as corduroy, consists of two parts: mountain cashmere weave and milled weave. , the surface of the fabricpresents a wick-shaped and clearly raised pile. Corduroy fabric has a smooth and soft feel, bright and round velvet strips, soft and uniform luster, thick and wear-resistant, and is more popular in today's market. But in real life, it turns out that the corduroy fabric is easier to tear, especially the tear strength along the pile direction is low.
Corduroy fabrics are mainly torn along the line direction, while regular corduroy fabrics are usually weft pile fabrics, so this test only tests the tear strength of the fabric in the weft direction. Influencing factors of fabric tear strength According to the mechanism of tear breakage and considering the practicality and economy in practical applications, four parameters were selected in this test, namely ground weft density, warp density, weft yarn breakage strength and elongation at break, and were analyzed by multiple linear The method of regression analysis establishes the relationship tussen these parameters and the tear strength, and find the main influencing factors of the tear strength of the corduroy fabric.
Among the influencing factors of the weft tear strength of corduroy fabrics, the influencing factors are the breaking elongation and breaking strength of the weft yarns, which account for 37.91% and 35.93% respectively, and the rest is ground weft density and chain density. . Some unconsidered factors, such as the weaving resistance, the arrangement of the weft yarns and the pile density, also account for a certain proportion, about 8.22%. This shows that while there are many factors that affect the weft tear strength of corduroy fabrics, the most important is the performance of the weft yarn itself. That is, the effective way to improve the weft tear strength of corduroy fabrics is to improve the internal quality of weft yarns.
Common corduroy fabrics are generally weft pilefabrics, which can easily tear along the pile direction. Among the influencing factors of tear strength, the elongation at break of the weft yarn has the greatest influence, followed by the breaking strength of the weft yarn, the ground weft density and the warp density. The impact tear strength of corduroy fabric was positively correlated with weft breaking strength, weft breaking elongation and soil impact density, but was negatively correlated with warp density. The configuration of the weft yarn also has a great influence on the tearing bow force of the corduroy fabric in the weft direction. The configuration of the ground weft and pile weft is relatively large, and the tearing strength is relatively small.