LINT AND NON-LINT CONTENTS IN SLIVER AND IN WASTES AND FIBER-BREAKAGE IN HIGH SPEED CARDING

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The effect of carding speed on the non-lint content of silver and of taker-in wastes was investigated using a conventional card in which the speed of all parts is proportional to that of the cylinder. The Shirley Analyzer and Fibrogram were used for this study, and the produced sliver was of 100 grain/yard.The results obtained by changing of the cylinder speed from 170rpm to 340rpm were as follows;(1) The total non-lint content in the produced sliver to the amount of lap fed is decreased from about 1.7% to 1.3%.(2) The lint in the produced sliver measured by the Shirley Analyzer is increased by about 0.4% from 98.2% to 98.6%, while about 0.5% decrease in the yield rate of the sliver occurs, as shown in the previous report. Thus decrease of lint content in the produced sliver to the amount of lap fed becomes about 0.2%.(3) The visible waste content in the taker-in waste to the amount of lap fed is strikingly increased, although the lint content in the flat strip and the taker-in waste to the amount of lap fed is slightly increased simultaneously.(4) Both the mean fiber length and the distribution of fiber length of the sliver seem not to be influenced by increasing the speed of every part of the card.
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