Study On The Modification And Spinning Property Of Apocynum Venetum Fiber

Apocynum venetum is a kind of wild perennial herbaceous root plant,and belongs to the oleander department.Apocynum venetum fiber is regarded as "the king of wild fiber",because of its excellent mechanical properties and medical health function. Apocynum fabrics which besides have the common feartures of Ma fabric, still have certain antibacterial, health care and resist ultraviolet ray function,are welcomed by consumers at home and abroad. The Apocynum venetum resources in our Country is very abundant especially in eastern Tarim basin of Xinjiang region.Since its own characteristics and degumming precess imperfect,apocynum venetum fibers have such shortcomings as the surface is smooth, high stiffness,the length is different greatly. These defects and their effects are the main reason of high percentage of noil fiber in carding procedure and poor yarn eveness,which not only directly prevent weaving process from working smoothly, but also reduce the wear life of fabrics.This has slowed the extending utilization of apocynum venetum fiber and its products. At present our country most apocynum resources have not been development, caused a great waste of resources.In view of above facts, on the basis of a study on the structure and properties of fiber,fist,three modifications are adopted to deel with original apocynum venetum fiber in order to increase the surface roughness,reduce the fiber stiffness and enhance spinnability,they are plasma modification,soft finish and plasma-softener union modification.Second,Spinning experiments with modified fibers are carried out.By changing experimental parameters, proper spinning technology for apocynum vetunum fiber are fund.The conculsions are drawn as follows:(1) Apocynum venetum fibers have very smooth surface and no natural convolution along the length of fiber. Fibers hve high fiber length variation and fibers short of20mm account for a very high proportion.The breaking strength and initial modulus of apocynum fiber are very high but elongation is very low.(2) During plasma modification,the strength of apocenum fiber is not change remarkably.The surface of fiber is deeply changed by plasma and coefficient of friction improves dramatically.soft finish has no significant effect on the fibre strength, but after finishing,fiber’s initial modulus reduce to a relatively low level,softness performance is greatly improved.(3) To some extent,the quality of yarn is closely related to the percentage of noil fiber in carding procedure. Along with the increase of noil fiber, breaking strength and abrasion times of ring yarn shows an upward trend, hairiness index and fineness irregularity gradually reduced.Then when the percentage of noil fiber is higher than40%, related parameters of the yarn goes up steadily.So, the yarn quality can be improved by controlling the percentage of noil fiber in carding procedure.(4) In rotor spinning experiments, rotor diameter is one of the key parameters affecting rotor spun yarn.yarn quality varied greatly with different specification rotor. Adjust the parameter as follows:the rotor diameter is32mm,the rotor speed is65000R/min,the combing rotor speed is8000R/min,the rotor spun yarn is of higher quality.(5) The experimental results show that after fiber modifications, both the ring yarn and the rotor spun yarn quality have improved with different degree.Plasma modification has significant effects on breaking strength, abrasion times and fineness irregularity. Soft finish and plasma-softener union modification have obvious effects to reduce the hairiness index of apocynum venetum yarn. This shows that spinning high quality pure apocynum yarn has certain valuable feasibility and applicability after proper fiber modification.