The main factors affecting the stretching and tearing strength of fabrics are the following:
1, and the warp and weft yarn breaking strength, strength related. This is related to the material and blend ratio of the raw material of the yarn, the fineness (count or number) of the fiber itself, and the fineness (count or number) of the yarn, the yarn evenness, the moisture regain or the moisture content, Yarn or strand, single yarn and strand twist (twist coefficient), fiber or yarn storage life and other factors are related. Elastic fibers, including their elongation, can make a big difference.
2. The factors affecting fabric strength are also related to the weaving methods and weaving conditions (such as: knitted fabrics and woven fabrics), organizational structures (such as: plain, twill, satin, jacquard, and others), and the density of warp and weft yarns. The strength of the warp and weft are different, and the strength of the top is different. Whether it contains cloth edges, whether it is solid edges or burrs, whether it avoids defects and folds, there may be differences in the distance from the edge of the original fabric (so the sampling must be At least 150 mm away from the cloth edge).
In addition, the sizing grey cloth and the desizing cloth, the dyed and finished cloth, especially the impregnated cloth and special finishing cloth, will have a big difference in strength. Weaving processes, dyeing, sanding, etc. all have an impact. The thicker yarns show better strength than the finer yarns. The diagonal weave is better than the plain weave. The non-grinding is better than the rubbing, and the less corrosive the dyeing, the better.
3, the strength of yarn-dyed fabrics and the original yarn strength, warp and weft density, yarn fineness, finishing processes are related to these several items, we must improve the strength of yarn-dyed fabrics from these items to be improved . The ironing-free fabric will be stretched and tear strength will be reduced after being free of ironing, which directly affects the durability of the fabric.
The tensile and tear strength of the fabric before and after the non-iron finishing, the strength and elongation of the yarn, the interweaving resistance, and the morphological structure have a significant influence on the strength. When the fabrics made of strong and high elongation yarns are torn, the force triangle area is large, and the number of yarns under common forces is large, and the tear strength is high. The organizational structure and the density of warp and weft yarns affect the interweaving point and slippage between the yarns. The number of interlaced points is small, and the yarn slips easily. The tear strength of the fabric is high.
4. After the garment is worn for a certain period of time during actual wear, the yarn in the fabric becomes fine due to friction, and some parts often undergo a sudden tearing effect. When the following garments are worn, certain parts of the hips and clothing are worn. Parts caught by the object, the external forces applied to these parts cause the internal yarns of the fabric to break by the limit load. During the use of textiles, if it is subjected to local concentrated loads for a long period of time, it may cause the strength to reach the limit and decrease, thereby affecting the stretching and tearing strength of the fabric.
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