Wool is generally divided woollen yarn into two types: knitted wool (for short) and knitted wool (for short). The number of strands, characteristics and uses of the wool are used as the distinguishing standard. Wool: The number of strands is more than three (including three), but the number of strands is more than 6 (including 6) is wool. Knitted wool: the number of strands is two strands, the number of strands is less than 6, or the finished product is a single strand, which is exclusively used for knitting processing, all of which are knitted wool. Use the length of the unit component of the fiber or yarn to indicate the moisture regain. Due to the different calculation unit systems, it is usually divided into two types: metric and imperial counts. Metric count. The length (in meters) of a fiber or yarn weighing 1 gram at a given moisture regain. The finer the fiber or yarn, the higher the metric count. The thickness of hemp fiber and wool yarn, wool-type chemical fiber pure and blended yarn, as well as spun yarn and ramie yarn are indicated by the metric count. The metric count of the strand is indicated by dividing the nominal count of the single yarn that makes up the strand by the number of strands. The imperial count.
One pound (453.5 grams) of cotton is spun into a 840 yards (one yard is equal to 0.9144 meters), and the length of cotton yarn is one yarn; 8400 yards is 10 yarns, the more the count, the finer the yarn, natural cotton fiber The better the quality, the counts are 21, 32, 38, 42, 46, 60S÷2, etc. (S÷2) is the mark of a double-stranded line. The more the count, the better the quality. The British system count is indicated by the English letter S, which is converted into meters÷grams to 1S=1.69336 meters÷grams. As long as you know the meter length and weight of a ball (twisted) yarn, it is not difficult to calculate the yarn count, namely: count Number = length in meters ÷ weight ÷ 1.69336. Due to the inconvenience of calculation, the number of countries used today is decreasing. The indication method of the imperial count of the strand is similar to the metric count. In addition to the above two indication methods, two units of tex and denier are generally adopted internationally. Tex is abbreviated as special, also known as number, which is indicated by the weight (gram) of a 1000-meter-long fiber or yarn at a given moisture regain. "Yarn count" in a nutshell refers to the thickness of the yarn.
What is commonly used in China is the "imperial system": one pound (453.5 grams) of cotton yarn (or other component yarn), the length is 840 yards (0.9144 yards/ M), the fineness of the yarn is one piece. If a pound of yarn, its length is 10×840 yards, its fineness is 10, and so on. The representation method of yarn count: the representation symbol of the British system is the English letter "S". The representation method of a single yarn is: 32 single yarns Expressed as: 32S strands expressed as: 32 strands The thread (two twists in parallel) is: 32S/2, and 42 threads and 3 twists are: 42S/3. Count: the count of wool yarn is expressed in metric count, the count is large, the wool is thin, the count is small, and the wool is thick. The metric count refers to the number of counts of yarn in 1kg of wool yarn. For example, 1kg wool yarn is 18000m long, which is 18 yarns. The twist of wool and wool: The twist of wool and wool refers to the number of twists per unit length. The twist has a twist direction, there are "S" twist and "Z" twist. The twist generally refers to the number of twists/m. The counts of the wool yarn and the yarn are different, and the twist is also different. In order to facilitate the comparison of the twists of the different counts of wool and yarn, the commonly used The concept of "twist coefficient".
The choice of "twist coefficient" is generally that pure wool is larger than blended yarn, blended yarn is larger than chemical fiber yarn, short wool content is higher than short wool content, and yarn count is finer than thick yarn. The tensile strength of wool yarn and wool is called strength. It is expressed by the load of the broken yarn, and the length of the stretched yarn and wool yarn is called elongation. The strength of wool yarn and woolen yarn is closely related to the fastness of fabrics and production efficiency. Strength is the basis of fabric strength and elongation. Therefore, the strength and elongation of wool yarn and woolen yarn are important indicators of quality, because the strength and elongation directly affect its quality. , Requires proper strength and elongation. Too large raw materials will loosen the wool yarn and woolen yarn and reduce the strength; if the strength is too small, the strength will increase and the wool yarn and woolen yarn will become stiff. The strength and elongation of the wool yarn and yarn vary with the degree of use and processing, as well as the fiber arrangement. The quality of the raw material is good, the fiber arrangement is neat, and the twisting is appropriate, the higher the strength of the wool yarn and the higher the stretch performance.