Yarn is a kind of textile, with a variety of textile fiber processing into a certain degree of fineness of the product, used for weaving, rope, thread, knitting and embroidery, etc., divided into short fiber yarn, continuous filament, etc.
Yarn fineness can be expressed in various ways, such as number, metric, imperial, and denier (see number). The twist of a yarn is indicated by the number of turns per meter or inch.
Wool yarn and wool yarn are used for spinning wool sweater, wool pants, wool vest, scarf, hat and glove and knitting all kinds of spring and autumn clothing articles for use, besides keep warm, still have adornment effect.
1) Volume density: reflects the characteristics of fiber stacking;
2) Twist Angle and crimp of the fiber: reflect the straightness of the fiber along the yarn axis;
3) Number of strands and twist direction of strands:
4) Linear density (diameter) and coefficient of variation: reflect yarn thickness and variation
5) The force between fibers (friction factor, entanglement, action segment or slip length, etc.) : reflects the stability of yarn structure
