Wool Yarn Manufacture PDF

INTRODUCTION TO WOOL YARN MANUFACTURING PROCESS  WOOL YARN MANUFACTURING PROCESS There are two different wool yarn manufacturing systems: WOOLLEN AND WORSTED. The process of manufacturing worsted yarn is different from that used to manufacture woollen yarn. Worsted yarn is n...

INTRODUCTION TO WOOL YARN MANUFACTURING PROCESS  WOOL YARN MANUFACTURING PROCESS There are two different wool yarn manufacturing systems: WOOLLEN AND WORSTED. The process of manufacturing worsted yarn is different from that used to manufacture woollen yarn. Worsted yarn is normally made using fleece wool which generally contains the longest wool fibres, are less variable in fineness and are generally less contaminated with vegetable matter. The process of manufacturing worsted yarn is quite complex. Worsted processing requires repeated steps of gilling and combing to form the top or sliver. It also follows the drawn- spun yarn spinning method. Woollen yarn is usually made from shorter wool fibres. The wool fibres are more variable in length, often more contaminated and discoloured. The process for manufacturing woollen yarn is shorter with no gilling and combing. It follows the condenser-spun yarn spinning method.  WORSTED VS WOOLLEN SYSTEM — WHICH WOOL? As a general guide, fleece wool with staples longer than 60 mm and with diameter 12-24μm, goes to the worsted system. Wool for the worsted system is often called ‘combing wool’. Shorter fibres obtained from fleece or other parts of the sheep are processed through the woollen system. For example, wool shorter than 40-50 mm in staple length and/or longer than 80-120 mm and with diameter 20-30μm are used in the woollen system. Wool for the woollen system is often called ‘carding wool’. Worsted yarns are smooth and uniform, and used to make lighter and smoother wool fabrics. Woollen yarns are bulkier than worsted yarn and used to make thicker, heavier woven or knitted fabrics for thermal comfort. What is Woollen Yarn? Woollen yarn is usually created from fibres of the sheep's fleece. which are greater than 80-120mm in length and fine fibres, 20-30μm. Shorter fibres (