spinning systems: a great diversity

a brief review of production and consumption data of cotton fibers in the last few years is followed by an assessment of existing spinning techniques and equipment available on the market. a typical characteristic of the development trend in spinning machinery is its diversification, which seems to have put the ring-spinning technique on ..

improved staple processing performance through air charge control

results of an experimental study are presented which show that ring spinning ends down for polyester and 65/35 polyester/cotton blend yarns are lower when the air charge is positive than when it is negative. the increase in ends down with an air charge shift to negative is greater for a polyester/cotton blend than for 100 polyester yarn a..

effect of processing factors on the incidence of yarn faults in spinning

the influence of raw material quality and processing factors on the incidence of yarn faults has been studied by using the uster classimat system. factors like the quality of raw material, degree of opening and cleaning in the blowroom, type of carding and amount of waste removed during combing significantly influenced the number of fault..

prediction of cotton quality as a function of lint cleaner operating parameters

literature was examined and the data was utilized to develop prediction equations for cotton fiber quality as a function of input lint moisture, foreign matter content, fiber length and strength, batt weight, saw cylinder diameter and speed, feed rate, saw loading and combing ratio. fiber properties investigated include length, strength, ..

pilot plant studies on extracting cottonseed with methylene chloride

the practical feasibility of using methylene chloride to extract oil, aflatoxin and gossypol simultaneously from cottonseed flakes was demonstrated in a 56-hr experimental run using a pilot-scale, continuous extractor. nine different trials varying in extraction time, solvent:flake ratio, flake preparation method and blending with 5 ethan..

first approach to the study of the spinnability of ring-spun and rotor-spun cotton yarns

a study to determine the significance of the effects of fiber length, uniformity ratio, micronaire index, yarn linear density and yarn twist multiplier on the two yarn-spinning processes for cotton yarn (a) ring-spinning and (b) rotor-spinning is presented. the contribution of these variables to the multiple coefficient of correlation is ..

sensitivity analyses on resource utilization in cotton-spinning

this paper discusses the findings of sensitivity analyzes carried out on machine and manpower utilization in cotton-spinning the flow line is characterized by a series of stages with a different number of parallel machines at each stage. the sensitivity of the flow line to changes in the machine- and manpower-resource levels under given t..

yarn spun by different methods from blends of wool/cotton and wool/polyester

the scoured wool stock used in this study was mechanically cleaned and shortened by a carding cleaner machine developed at the srrc. wool/cotton and wool/polyester blends of 50/50 ratio were successfully processed into different types of spun yarns. the spinning methods were ring, ring yarn with nylon filament wrap, ring yarn with nylon f..

cotton dust control additives - effects on dust measurements and particle size characteristics

an additive applied to cotton in the textile opening line lowered the levels of card generated airborne dusts and associated microorganisms. dust from cotton containing additive had fewer smaller particles than dust from untreated cotton. the additive altered the nominal 1:1 relationship between airborne dust levels measured by vertical e..

effects of grass contaminated cotton on yarn manufacturing

cottons contaminated with grass and control cottons were processed into yarn. these cottons were carded with and without the use of crush rolls. the grass was not pulverized by the crush rolls as other foreign matter often is. the grass tends to fibrillate and behave as coarse fibers. these "grass" fibers appear to interfere with the draf..