Fine Worsted Yak Yarns and Fabrics

Yak mainly survives at high altitude in the Tibetan Plateau and the Himalayas. There are over 16 million yaks in the world and 80% of them are in China. Yak yarn possesses excellent strength, warmth and breathability. To the hand, it feels like cashmere. However, machine conversion of yak fibres into a useful yarn is challenging, particularly to obtain a fine yarn. In this project, a new spinning method and system were developed, which used a multi-level spinning triangle to produce fine worsted yak yarns with good yarn properties. The system incorporates newly-developed technical units into a conventional ring frame. The resulting yarn is a fine worsted yak yarn of high strength, low hairiness and good evenness. Knitted fabrics are thin and soft, and exhibit better air permeability and heat retention than those made with cashmere and merino wool fibres.

Application

  • A physical manufacturing method to produce fine worsted yak yarns;
  • A multi-roving feeding method applied to a modified conventional ring frame to produce fine worsted yak yarns of high strength, low hairiness and good evenness;
  • A multi-strand condenser and related components for the reduction of hairiness by controlling edge fibres on each draft strand;
  • A roving separator and related components for developing a multi-level spinning triangle by guiding each roving.

Industry Benefit

  • Cost advantage of yak fibre as compared to cashmere fibre;
  • Improved tenacity and hairiness of fine worsted yak yarns as compared to conventional yak yarns at the same twist level;
  • Light and soft yak knitted fabrics with better air permeability and warmth than those derived from cashmere and merino wool fibres;
  • Eco-friendly as no chemicals, water or steam are required for production;
  • Increased added-value and enhanced competitive advantages.

Licensing Details

A non-exclusive licence covers the knowhow of the technical device production and installation of spinning machine for production of the yak yarn.