Wool scouring systems

In wool-scouring systems for textile processing that contain nonionic surfactants, sodium chloride acts as a tme builder, ie, detergency promoter. 

Before processing, wool has to be scoured to remove contaminating particles such as dirt, sweat, and wool fat. The wool is dried in perforated cylinder driers and then opened in the breaker card. After these stages the fibers are oiled to alter the frictional properties of the fibers and to prevent electrostatic charging. The fibers are then pneumatically transported to the mixing chamber. Because raw wool scouring systems are very expensive and subject to strict environmental protection laws, most worsted spinning mills purchase scoured wool, card slivers, or combed slivers. 

Distribution of the scoured wool to the cards then occurs. This is often done using a combination of pneumatic and mechanical transport systems, usually with the provision of accumulator bins that hold a few hour s production. Modem cards are usually fed with tower feeds, which automatically control the height of the wool column. 

Scorch resistance, in vulcanization, 22 811 Scorch time, in vulcanization, 22 803 SCORE cleaning system, 24 22 Scotch-Marine boiler, 22 319 Scouring, 9 171, 183, 189, 192, 197 of fibers, 22 180 in wool processing, 26 384-385 Scoville Heat test, 23 159 Scrap... 

The efficiency of the vegetable matter (burr and seeds) removal mechanism depends on the careful maintenance of settings and speeds and the level of drying of the scoured wool (86). The burr wastes contain wool fiber. Burr, together with fiber which has dropped beneath the card, may be carbonized and used in the woolen system. 

Woollen and worsted yams, unless dry spun contain significant amount of lubricating oil and are usually scoured in hank form in a continuous scouring machine. The hanks are transported through the scouring sets either by tape (Fig. 5-21) system or by battrices (Fig. 5-22). Usually, the sets have four bowls two scour bowls, one rinse bowl and a final bowl where acidification and moth proofing is carried out. There is a pair of squeeze roller between each bowl. The top roller is usually lapped with wool or cotton sliver and the bottom roller is made of metal. Pressure is applied to have an expression of about 60%. The characteristic features of the two types of machines are summerised in Table 5.2. It is normal to scour only 1-2... 

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