Mechanical Properties Of Polylactide Fiber Blended Yarn And Fabrics

Polylactic fiber is a new type of environment protective fiber. It has many excellent performances and can be degraded completely into water and carbon dioxide. It is able to be blended with natural fibers such as cotton and wool to produce various kinds of garments and decorations. This kind of textile has advantages of good elasticity.However, More studies should be done in the area where polylactic fiber applies to apparel. Currently it mainly is used in industrial production, researches of apparel application are relatively less than other areas. Deciding the blending ratio remains a key problem to make blending yarn and fabric get better performances.Main parts to be studied in this paper are as below:(1) Spinning procedure of Polylactic and the blending yarn(2) Mechanical research of Polylactic and the blending yarn(3) Mechanical research of Polylactic and the blending knitted fabricBased on research in this paper, below conclusions are summarized:(1) Choose the most suitable procedure and parameters on basis of polylactic's property. The critical twisting coefficient is found around 405.9 through experiment.(2) A new model with 4 elements made of spring, Maxwell and nonlinear-spring is found to describe the tension property of this yarn.(3) When the percentage of polylactic gets around 70%, polylactic and cotton blended yarn will get worst strength; when the percentage gets around 60%, polylactic and modal blended yarn will get worst strength.(4) Strength of polylactic-cotton blended knitted fabric and polylactic-modal blended yarn will drop to the bottom respectively with polylactic percentage of 70% and 60%. Both varying curves are similar to their blended yarns.