Preparation Yarn

Preparation Yarn
PREPARATION YARN
Coarse yarns spun from the waste of the spinner and used as warp for cheap cotton suitings, towels, sheetings, sponge cloth, etc. Its chief characteristic is strength, so it is generally used for warp yarns. The method of spinning diners from that for condenser yarns. As with the condenser system there are two kinds of preparation spinning. The hard waste section includes cop waste, reelers', winders', doublers', ring waste, etc. The soft waste section produces yarns from comber waste, strips, blowings, fly, droppings, etc. The machinery used in the average hard waste mill comprises cop bottom breakers, scutchers, breaker cards, Derby doublers, finisher cards, roving frames, mule or ring frames. The manipulation of the material is the same as for condenser spinning up to and including the Derby doubler. The laps from the Derby doubler are fed to the finisher card in the usual way. As the web reaches the doffer it is divided into four, five, or sometimes six slivers. Each sliver is then drawn through a " trumpet" by rollers, and thence through a coiler into a can (see waste)

Dictionary of the English textile terms. 2014.

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