Draw ratio

machine draw ratioIn a drawing process, the ratio of the peripheral speed of the draw roller to that of the feed roller.natural draw ratioThe ratio of the cross-sectional areas of a filament before and after the neck when a synthetic filament or film draws at a neck.residual draw ratioThe draw ratio required in draw-winding, draw-texturing and draw-warping to convert a partially oriented yarn into a commercially acceptable product.true draw ratioIn a drawing process, the ratio of the linear densities of the yarn before and after drawing.

Draw roll

The output roller of a zone in which drawing takes place,

Draw roller

The output roller of a zone in which drawing takes place,

Draw thread (knitting)

A thread introduced during knitting which, on removal, separates articles that have been knitted as a succession of connected units.

Draw threads (lace)

Removable threads included in the construction of lace either to act as a temporary support for certain parts of the pattern or to hold together banded laces, that are separated subsequently by their removal.

Draw-Back

A crossed end; an end broken during warping that when repaired was not free or was tied in with an adjacent end or ends overlapping the broken end. The end draws or pulls back when unwound on the slasher. (Also see STICKER 1

Draw-beaming

A process for the preparation of warp beams or section beams from a creel of packages of

Draw-Crimping

See DRAW-TEXTURING.

Draw-down

In manufactured filament extrusion, the ratio of take-up or haul-off speed to the average speed of the spinning fluid at the exit from the spinneret hole.

Draw-Frame Blends

Blends of fibers made at the draw frame by feeding in ends of appropriate card sliver. This method is used when blend uniformity is not a critical factor.

Draw-Sizing

A system linking drawwarping and sizing in a continuous process. A typical system includes the following

Draw-spinning

A process for spinning partially or highly oriented filaments in which the orientation is introduced prior to the first forwarding or collecting device. (See also spin-drawing and highspeed spinning.)

Draw-texturing

A process in which the drawing stage of synthetic yam manufacture is combined with the texturing process.
Note 1.. The drawing and texturing stages may take place in separate, usually consecutive, zonesof a machine (sequential draw-texturing) or together in the same zone (simultaneous drawtexturing).
Note 2.. The usual feedstock for simultaneous draw-texturing is partially oriented yarn.

Draw-twist

To orient a filament yam by drawing it and then to twist it in integrated sequential stages.

Draw-Twisting

The operation of stretching continuous filament yarn to align and order the molecular and crystalline structure in which the yarn is taken up by means of a ring-and-traveler device that inserts a small amount of twist (usually ¼ to ½ turn per inch) into the drawn yarn.