Nylon is a trademark name and the formal chemical name is polyamide fiber (abbreviated as PA). Polyamide fiber was invented by scientists in the United States in the 1930s and industrialized, which was the first synthetic fiber created by humans. It can be considered an important milestone product and is one of the 100 greatest…
Yarn is a textile product processed from various textile fibers to a certain fineness, and is used for weaving, rope making, sewing, knitting, and embroidery in the hosiery industry. It is divided into short fiber yarn and continuous filament yarn. There are multiple methods of expressing the fineness of yarn, such as yarn count, metric…