3.The thesis explain the production process and process specification of the raw material pretreatment, scutching. dressing. drawing. roving. spun yarn.
5.A detailed explaination is made on rational assortment of bourette silk, ramie, wool andchemical fibres for the purpose of improving rotor spun yarn quality.
6.Property of cuprammonium rayon was introduced.Three passages drawing was done,and this processing plan was adopted when spinning cuprammonium rayon cotton blended knitting yarn.
7.Trial spinning is described through analysis on the spinnability of trivoltine cocoon waste material, which can produce ultrafine spun silk yarn due to its excellent spinnability.