Twine Production

the aggregate of manufacturing processes necessary to make twine.

Twine from bast fibers (hemp and flax) is manufactured by spinning and twisting. Manufacture begins with emulsification of the fiber to soften the plant gums, after which the material is carded to break up large complexes of fibers and remove trash. Sliver is then prepared on a system of drawing frames, with from two to three machine transfers. The spinning is done from the sliver; yarn up to 800 tex is produced on ring spinning frames, and yarns of 1,000 tex and more are spun on flyer spinning frames. The twine is then twisted from the resulting yarn and finished (sized and polished). Single-thread twine is manufactured only by sizing the yarn. Industrial twine is not finished. Double- and triple-thread twine is twisted from single-thread twine on twisters in double and triple structures, respectively, and then rewound into yarn packages. Six-thread twine is twisted in a triple structure from polished double-thread twine. It is then polished again and rewound onto spools or bobbins.

Paper twine is produced from special twine paper cut into strips in widths appropriate to the weight of the twine. The strips are twisted on twisters, and the twine is then polished with paraffin and rewound onto bobbins. Polypropylene twine is made by twisting flat polypropylene threads together.