Horizontal Line

See RING.

Horizontal-mill section warping

Yorkshire and Scotch warping and silk-system warping; horizontal-mill warping. A two stage-machine method of preparing a warp on beam, consisting in:
(i) winding a warp in sections on a reel (drum, mill, swift);
(ii) beaming-off the complete warp from the reel on to a warp beam. The procedure is as follows:(a) Ends in closely spaced sheet form (approximately loom-warp sett), withdrawn from a warping creel, are wound on the machine reel to loom warp length.(b) Each such sheet of ends is called a 'section'.(c) Stability of the yarn-build of the first section on the reel is obtained by moving the section sheet laterally at a regular rate as winding proceeds, so that its outer edge is supported by a fixed or adjustable incline fitted at one end of the reel.(d) When the first section is complete, the other edge of its build on the reel is a replica of the original incline. Sections to the number required for the complete warp are wound similarly.(c) Fancy warps are prepared by 'dressing' yarn packages in the creel for each section in conformity with the warp pattern plan.(f) Section sheets are attached to a beam and withdrawn simultaneously from the reel by rotation of the beam. This unrolling is controlled to provide suitable warp tension for winding the warp on to the beam. As beaming-off proceeds, the warp beam is moved laterally at the same rate but in the direction opposite to that of the section during warping. This ensures that the complete warp sheet runs from the reel to between the beam flanges without the need for lateral deviation.
Note: The efficiency of a section-warping machine is normally of the order of 25-30% because warping ceases during the beaming stage. Single-stage section-warping machines (without a beaming mechanism) are designed with interchangeable reels to improve warp output. The reels may be either of normal capacity (one warp of loom-beam length) or of large capacity (several warps of loom-beam length). Warp from either type may be transferred to warp beams in a beaming machine or on to loom beams in a warp-sizing machine. In each method, a reel is traversed at the same rate as during warping but in the opposite direction..

Horse fibre (hair)

Fibre from the horse (Equus caballus).

Hose (narrow fabrics)

A tubular woven fabric for conveyirig fluid under pressure.
Note.. Hose is manufactured in both unlined and lined forms. When unlined, the weave is plain and the material is generally flax or hemp with a weaving density so arranged that when the fibres swell on wetting, the fabric becomes tight enough to reduce percolation under pressure to a negligible amount. For lined hose, fibres other than flax or hemp may be used in a plain or twill weave. Light-weight hose woven from synthetic yarns may incorporate an independent tubular palstic lining which is introduced during the weaving process or afterwards.

Hosiery

1. Knitted coverings for the feet and legs.
2. Formerly in the United Kingdom the term was used in the generic sense of all types of knitted fabrics and goods made up therefrom.

Hosiery knitting machine

A knitting machine for the production of hosiery. Most are small-diameter latch-needle circular knitting machines.

Hot drawing (synthetic filaments and films)

See drawing, hot (synthetic filaments and films).

Hot flue

A machine in which llot air is used to dry fabric carried on rollers along a serpentine path.

Hot mercerization

The treatment of ceiltilosic fabric with a hot concentrated solution of caustic alkali to facilitate uniform penetration prior to cooling and stretching etc., so as to improve the degree of mercerization(sub category of mercerization)

Hot mercerization

. hot mercerization The treatment of ceiltilosic fabric with a hot concentrated solution of caustic alkali to facilitate uniform penetration prior to cooling and stretching etc., so as to improve the degree of mercerization.

Hot-Air Shrinkage

Generally the reduction in the dimensions of a fabric yarn or fiber induced by exposure to dry heat. Specifically a fundamental property of fibers.

Hot-fluid jet textured yarn

the yarn is injected by a plasticising jet of hot fluid (usually hot air, sometimes steam) into a texturing tube or nozzle (hot-find jet texturing);

Hot-Head Press

A pressing machine capable of generating high temperatures and pressures. Used for pressing and processing permanent-press fabrics.

Hot-Melt Adhesive

A solid material that melts quickly upon heating then sets to a firm bond upon cooling. Use of this type adhesive provides almost instantaneous bonding.

Hottenroth number

A measure of the degee of ripening of viscose. (See also salt figure.)
Note., A Hottenroth number is the volume in millilitres of 10% ammonium chloride solution needed to induce incipient coagulation in a somewhat diluted viscose (solution) under standard conditions.