Fiber skein

Fiber skein A continuous fiber, filament, strand, yarn, or roving wound up to some measurable length and usually used to measme variotis mechanical and physical properties. 

Manufacture of gas-separation membrane modules is largely a machine-assisted, labor-intensive operation. Polymer dopes are typically prepared batchwise with sufficient hold time to insure uniformity. The membrane performance is largely controlled by the polymer precipitation step and very dependent upon phase behavior and precipitation kinetics. Thus, it is essential that processing conditions be maintained as uniformly and as constant as possible if product quality and uniformity is to be preserved. For this reason, membrane-fihn formation and hollow-fiber spinning processes are usually operated continuously or for extended run times. Since the intermediate film or fiber must eventually be converted into discrete items, the continuous process is typically interrupted by collection of the membrane formed on spools or fiber skeins where it may be inventoried briefly before batch processing into the final assembly resumes. 

The formulation of a carrier depends on four considerations (/) the carrier-active chemical compound (2) the emulsifier (J) special additives and (4) environmental concerns. Additional parameters to be considered in the formulation of a carrier product with satisfactory and repeatable performance arise from the equipment in which the dyeing operation is to be carried out. The choice of equipment is usually dictated by the form in which the fiber substrate is to be processed, eg, loose fiber, staple, continuous or texturized filament, woven or knot fabric, yam on packages or in skeins (see Textiles). 

A coning and de-knitting lubricant for space printed yarns. Non-smoking, excellent fiber-to-metal lubricity. May be applied to skeins or packages by exhaust method. 

Mercerization m3r-s3- rlz vf [John Mercer f 2866 English calico printer] (1859) A treatment of cotton yarn or fabric to increase its luster and affinity for dyes. The material is immersed under tension in a cold sodium hydroxide (caustic soda) solution in warp or skein form or in the piece, and is later neutralized in / acid. The process causes a permanent swelling of the fiber and thus increases its luster. 

Yam quantities are usually measured by weight in ounces or grams. In the United States, Canada, and Europe, balls of yam for handcrafts are sold by weight. Common sizes include 25, 50, and 100 g skeins. Some companies primarily measure in ounces, with common sizes being three-ounce, four-ounce, six-ounce, and eight-ounce skeins. These measurements are taken at a standard temperature and humidity, because yam can absorb moisture from the air. The actual length of the yam contained in a ball or skein can vary due to the inherent heaviness of the fiber and the thickness of the strand. For instance, a 50g skein of cotton yam may contain several hundred meters, while a 50 g skein of bulky wool may contain only 60 m. 

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