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Core spun yarns thro this friction spinning are used in shoes, ropes and industrial cable manufacturing. Filler cartridge for liquid filtration also effectively made with these yarns. Secondary backing for tufted carpets can be produced with waste fibres in this spinning system .Upholstery, table cloths, wall coverings, curtains, hand-made carpets, bed coverings and other decorative fabrics can be produced economically by DREF Spinning system. Heavy flame-retardant fabrics, conveyor belts, clutches and brake linings, friction linings for automobile industry, packets and gaskets are some examples were the DREF yarns can be effectively used.
The DREF-3 yarns made fabrics used in many applications like backing fabrics for printing, belt inserts, electrical insulation, hoses, filter fabrics and felts made from mono-filaments core. Hot air filtration and wet filtration in food and sugar industries these yarns made fabrics are used. It also used in clutch lining and brake lining for automotive industries [6].
The multi-component yarns manufactured using DREF 3000 technology are mainly employed for technical textiles of the highest quality. They provide heat and wear protection, excellent dimensional stability, outstanding suitability for dyeing and coating, wearer comfort, long service life , as well as a range of other qualitative and economic advantages. These include cost savings due to the use of less expensive materials, special fibres and wires as yarn cores. Apart from their strength, DREF 3000 yarns are also notable for their good abrasion-resistance, uniformity and excellent Uster values compare to previous systems.
8.0 Limitations of Friction spinning system
Low yarn strength and extremely poor fibre orientation made the friction spun yarns very weak. The extent of disorientation and buckling of fibres are predominant with longer and finer fibres. Friction spun yarns have higher snarling tendency. High air consumption of this system leads to high power consumption. The twist variation from surface to core is quite high; this is another reason for the low yarn strength. It is difficult to hold spinning conditions as constant. The spinning system is limited by drafting and fibre transportation speeds.
References
1. Lunenschloss,J and Brockmanns KJ, Mechanism of OE-Friction spinning. Int.Text.Bull., yarn forming, No.3,29-59,1985.
2. Lunenschloss,J and Brockmanns KJ. Review of OE spinning Melliand Textilber.(Eng.Edition), 174-181,11,march, ,1982
3. Krause,H.W., Staple-Fibre spinning systems.J.Text.Inst., 76, No.3,185-195,1985.
4. Fehrer,E., Friction spinning: The State of the Art. Text. Month, Sept., 115-116,1987.
5. Gsteu,M., A spinning process Makes the Grade. Int. Text. Bull., Spinning, No. 1,65-82,1982.
6. Fehrer, E., Friction Spinning: The Inventor�s Analysis. Text. Month, Dec.,31-34,1986.
7. Fehrer, E., Contribution on the State of Development and the patent Situation with Regard to Friction Spinning Machines.Chemisefasern/Textilindustr.,37/89, Apr.,E49-50,1987.
8. Achnitz, R.,Elsassar, C.C.N., Mac, T., Maesschke, O.,Meyer, J., Paschen, H.,Phoa, H., and Schenuit, J.,ITMA review: Spinning. Mellinand Textilber(Eng Edition),5,260-266,1999.
9. Ishtiaque, S.M.., Spinner�s Attraction at ITMA�99. Asian Text. J., 27-32, Oct ., 1999.
10. Rust, J.P and Lord, P.R., Variations in yarn properties caused by Series of Design Changes in a Friction Spinning Machine. Text.Res. J., 61,645-655 ,1991.
11. Lord,P.R. and Rust, J.P., Fibre Assembly in Friction Spinning.J.Text. Inst., 82, No.1,109-113,1991.
12. Lord,P.R. and Rust, J.P., 1001. Fibre Assembly in Friction Spinning.J.Text. Inst., No.4,465-478,1982.
13. Lord,P.R. and Rust, J.P., The Surface of the tail in Open-End friction Spinning.J.Text. Inst., 100-103,81,No.1, 1990.
14. R. Chattopadadhyay and S. Banerjee. The Frictional Behavioue of Ring- Rotor-,and Friction-Spun Yarn.J.Text.Inst., 88,part I,No.3,59-66,1997.
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