Fiber sliver

Fiber sliver A number of staple or continuous filament fibers aligned in a continuous strand without twist. 

The above processes are used for application of cfyes to textile substrates in the form of fiber sliver or top, yarn, or fabric by batch (discontinuous) or continuous methods. 

Purified linters are used extensively in the USA for the prepn of NC, but longer fibers are preferred in Engl. During WWI, Engl also used material called slivers (Ref 1, 3, p 30), which was staple cotton in the form of unspun strips — an intermediate stage in the manuf of yam. Although more expensive than cotton waste, it yielded purer and more stable Cordite... 

Because fiber frictional properties are so important in the conversion of staple yams to spun yams, ASTM D2612 has been designed to measure the cohesive force encountered in the drafting or fiber alignment of sliver and top under static conditions. This frictional force is affected by surface lubrication, linear density, surface configuration, fiber length, and fiber crimp. 

The main applications are piece dyeing, which is important for the dyeing of the CEL component of PES-CEL blended fabrics, yarn dyeing, and dyeing of flock, card, sliver, etc., for blended yams with wool and man-made fibers. 

Processes 8 and 9 again employ gids. The purpose is to shuffle the fibers in the combed sliver to produce a random positional distribution, and thus the most even sliver possible. The second finisher gilling will also incorporate either a ball winding head, or a press that condenses top that has been delivered into a can. This latter product is called bump top. Both ball and bump facilities are usually necessary to satisfy customers differing needs. Bumps or balls will then be further pressed into bales for shipment. Combed wool destined for processing on the woolen system may be sucked in short lengths from the comb to form broken top. 

Cellulose substrates used in digestion studies were (ground) Solka Floe alpha cellulose, a non-nutritive fiber used for formulating animal diets (Gen. Biochem. Co.) Avicel, microcrystalline cellulose (American Viscose) heated milled Solka Floe (7) and (not ground) Whatman No. 1 filter paper, cotton sliver (25) and absorbent cotton (White Cross Co.). 

FIRST AID rinse eyes immediately with large amounts of water for several minutes refer immediately to an ophthalmologist to determine possibility of damage to cornea by fibers remove asbestos slivers promptly from affected areas of skin if breathing is difficult, provide oxygen provide artificial respiration if breathing has stopped in case of ingestion, seek medical... 

The specimen consists of sliver or top mounted (initially on a paper carrier to prevent stretching or fiber separation during mounting) between the jaws of a CRE ten.sile testing machine, and a force extension curve is developed. From this is determined the cohesive force to the nearest 0.1 gf from the maximum point of the curve. The drafting tenacity is calculated by... 

ASTM D 26I2 -91- Fiber cohesion in. sliver and top in static tests. 

ASTM D 4120 93 Test method for fiber cohesion in roving, sliver, and lop in dynamic tests... 

Fiber tow The precursor of staple fibers is tow, which consists of large numbers of roughly parallel, continuous filaments. They are converted by cutting or breaking into staple fibers or directly into slivers, intermediate stages between staple fibers and yarns. In the latter case, the filaments remain parallel. 

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