Abstract: Coffee carbon fiber is a kind of new functional fiber with antibacterial property, warmth retention and wet guide property and other good performances.It can transform structure to design different weft knitting fabrics according to different performance requirements.The tests of antibacterial property, warmth retention property and air permeability have been taken by methods of flash shaking method, flat heat preserve tester, gurley permeameter etc for studying various performance of coffee carbon fiber weft knitting fabrics.And it compares with nylon fabric.The tests show that the coffee carbon fiber weft knitting fabric has good antibacterial property and superior properties of warmth and wet guide because of its internal microporous effect.In addition, it has the very good air permeability.It can provide a reference basis of coffee carbon fiber weft knitting production for the future.

Key words: coffee carbon fiber, weft kvitted fabric, plain plating, performance