The textile machine twists many animal and plant fibers together to spin thread or yarn, which can be used to weave into cloth. All spinning machines only do two things: first, they aggregate a large amount of short fibers into loose cotton thread, then they gradually pull out the cotton thread and twist it into fine and dense cotton thread. After twisting, the cotton thread becomes longer. The twist of the yarn itself causes the fibers to naturally and tightly hold together, making it very advantageous for weaving or knitting. The twist of the yarn is related to the diameter of the yarn, and the measurement method is determined by the number of revolutions in each inch of yarn, expressed as low, medium, or high. Usually, the higher the twist, the more revolutions the yarn has, the better the strength of the yarn. Low twist yarn is often used to make smooth, glossy, or soft matte fabrics; On the contrary, fabrics with wrinkles or rough surfaces require high twist yarns to be manufactured. Testing items include density, yarn count, weight, yarn twist, yarn strength, fabric structure, fabric thickness, coil length, fabric coverage coefficient, fabric shrinkage or shrinkage, warp deformation, tensile strength, tear strength, seam slip, seam strength, adhesive strength, single yarn strength, yarn unit density strength, anti hook wire, crease recovery angle test, stiffness test, water repellency test, leak resistance test Elasticity and resilience, breathability, water vapor permeability, general ready-made clothing flammability, children's evening wear flammability, bursting strength, wear resistance testing, anti pilling and pilling resistance, etc P>
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