Study On The Moisture Absorption And Moisture-free Characteristics Of Double-layer Knitted Fabrics Interlaced By Colored Cotton And Polyester

Natural colored cotton is born with natural color, its character is attained by hybridizing and gene conversion modern bioengineering technology. Compared with process of other cotton, natural colored cotton need not dye process, water source pollution and forbidden dye and harmful assistant can be avoided. It reduces energy source consumption, so it makes its cost low and improves its competition. Natural colored cotton is environmental protection species and ecological adaptation, but there are irresistible disadvantages: poor fiber property, unstable pigment descendiblity, monotonic color luster scope. In order to extend its market occupation, some special functions must be given to natural color cotton.This paper introduces a new kind double-layer knitted fabric which is developed by Czechic Brrno knitted research institute. Thisfabric is composed by moisture absorption layer and moisture-free layer constitute. The two layers are connected by special yarn , this fabric has high speed of water transmission. So double-layer knitted fabric consists of natural colored cotton and polyester with special cross-section, the fabric has comfortable and natural function. Its will have a good market perspective. On this basis, many experiments are carried out, as follow:1 > In order to observe micro-cross-section of fibre, make cross-section slices with fibre slicer and observe them with microscope.2> Double-layer knitted fabrics of different outer yarn fineness > different lamp-wick density > different lamp-wick material and ribbed structure fabrics are knitted.3> According to traditional souring process and the new mixed knitted fabric from polyester and cotton yarn are compared.4> Fabrics are treated by hydrophilicity, discuss dimensional process by statistics method.5 > Moisture absorption and moisture-free functions of fabric are tested by drop method. Under imitating human beings sweat, whole dry ability of fabrics are tested by water evaporation method.6^ Combining liquid transportability ratio Si/S2, inter dry time t and whole dry ability V build a synthetic index Z which can evaluateliquid transportability and fast dry ability of fabrics.The following results can be derived from experimental date:KBest souring process is Na2CO3,3%;soap ,2g/l;JFC,3g/l;water ratio, l/20;temperature,90°C;time, 120min.2^ Best dimensional process is figurable time 23.69s,figurable temperature 188.27 "C.3> When lamp-wick density is 12.5%, liquid transportability and fast dry ability of fabrics are best in my research scope.4> Moisture absorption and moisture-free functions of fabrics which use T/C yarn as lamp-wick material are better than those which use pure polyester pure cotton as lamp-wick materials.5> Synthetic index Z can objectively and accurately evaluates liquid transportability and fast dry ability of fabrics.