Patent ID: 7060211

Claim:
A method for manufacturing yarn, comprising: a first step of collecting sheaths of bamboo shoots of one of Phyllostachys bambusoides, Phyllostachys pubescens, Phyllostachys nigra var, henonis, Phyllostachys nigra, Pseudosasa japonica and Pleioblastus simonii which have been left as they were or disposed of as wastes; a second step of drying the collected sheaths of the bamboo shoots using hot wind in a range of 50 to 100° C.; a third step of fibrillating the dried sheaths of the bamboo shoots into fiber of sheaths of bamboo shoots by one of physical-shock means of a shotblast, a stamper, and a beater; and a fourth step of spinning the yam out of the fiber of the sheaths of the bamboo shoots, wherein fine powder is separated from the fiber of the sheaths of the bamboo shoots fibrillated by the physical-shock means by blowing off the fine powder or using a current of water.