| 摘要 |
1,201,982. Textured filament yarn. E. BOBKOWICZ, and A. J. BOBKOWICZ. 14 Aug., 1968 [26 Sept., 1967], No. 38792/68. Heading B5B. Textured filament yarn is produced by introducing staple fibres and a tacky polymer substrate between a pair of rotating pressure rolls having continuous circumferential grooves and positioned face to face so that each male member of the grooved surface of one roll fits into the corresponding female member on the other roll to form at the nip point of said rolls cavities adjustable in depth and having shearing edges adapted to separate the resulting staple fibre-polymer composite into a plurality of tapes, with simultaneous consolidation of the tapes within said cavities. The grooves are preferably of substantially square cross-section and the rollers may be cooled. The polymer may be supplied as a continuous film or as a sheet of filaments. Preferably the rollers rotate at a rate faster than the feed-speed of the polymer, whereby orientation is effected. In one embodiment, two sets of filaments may be supplied, one of which is fully oriented and the other of which is fresh-spun and still tacky, and at least one of each type of filament is fed to each cavity. In a further embodiment only fully oriented filaments are fed, and these are heated to render them tacky, but without loss of orientation, as they are fed to the rollers. The staple fibres may be supplied randomly oriented, or lined-up, e.g. by means of electrostatic parallelization. Specified polymers are nylon, polyethylene and acrylonitrile. |
