Textile Materials (24)

摘要

1. The silk spinning speed of silkworms A silkworm discharges a length of 1,500 meters of filament over two days and nights to complete a cocoon. If the silkworm continues to work without taking a break, the spinning speed comes to 52 cm/min. Meanwhile, the common spinning speed for nylon or polyester is already 6,000 m/min., or more than 10,000 times greater than the speed of silkworms. Unless synthetic fibers are spun at such high speeds, sufficient strength will not be directly given to the spun yarn. . The illustration is a sketch of a 6,000-m/min. ultra-high-speed take-up winder.