SAILCLOTH- Any Heavy, Strongly Made Woven Canvas of Cotton, Linen, Jute, Polyester, Nylon, Aramid, Etc., That Is Used for Sails
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S SAILCLOTH- Any heavy, strongly made woven canvas of cotton, linen, jute, polyester, nylon, aramid, etc., that is used for sails. Laminated fabrics are also finding use in this market. Sailcloth is used for apparel, particularly sportswear. SAND- Used as a filter medium in fiber manufacture, particularly used in spinning packs for nylon or polyester production. SANDWICH BLEND- A method of preparing fiber mixtures by layering them horizontally in alternating layers with all elements in the proper proportion. Vertical sections are cut and fed to the next machine in the process, where blending is effected. SANFORIZED- A trademark of Cluett, Peabody & Co., Inc., denoting a controlled standard of shrinkage performance. Fabrics bearing this trademark will not shrink more than 1% because they have been subjected to a method of compressive shrinkage involving feeding the fabric between a stretched blanket and a heated shoe. When the blanket is allowed to retract, the cloth is physically forced to comply. SANFOR-SET- A trademark of Cluett, Peabody & Co., Inc., denoting a controlled standard of shrinkage performance originally developed for denims. Fabrics bearing this trademark will not shrink under home-wash, tumble-dry conditions because they have been subjected to a liquid ammonia treatment and compressive shrinkage. SAPONIFICATION- Specifically in relation to manufactured fibers, saponification is the process of removing part or all of the groups from acetate or triacetate fiber, leaving regenerated cellulose. SARAN FIBER- A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 80% by weight of vinylidene chloride units (-CH2-CCl2-) (FTC definition). Saran fiber has excellent resistance to sunlight and weathering and is used in lawn furniture, upholstery, and carpets. SASE- Acronym for stress at specified elongation; the stress experienced by a yarn or cord at a given elongation. SATEEN- A cotton fabric made in a satin weave. SATIN WEAVE- One of the basic weaves, plain, satin, and twill. The face of the fabric consists almost completely of warp or filling floats produced in the repeat of the weave. The points of intersection are distributed evenly and widely separated as possible. Satin-weave fabric has a characteristic smooth, lustrous surface and has a considerably greater number of yarns in the set of threads, either warp or filling, that forms the face than in the other set. SATURATION- 1. The maximum intensity or purity of a color. If the color is as brilliant as possible, it is at saturation; if the color is subdued or grayed, it is dull, weak, and low in intensity. 2. The upper limit concentration of a solute in a solvent, i.e., no more solute can be dissolved at a fixed temperature and pressure. SATURATION VALUE- The maximum amount of dye that can be absorbed by a textile fibe under defined conditions. SAXONY- 1. A high-grade fabric for coats, made from Saxony Merino wool. 2. A soft woolen with fancy yarn effects, used in sport-coat fabric. 3. A highly twisted worsted knitting yarn. 4. A term describing a cut-pile carpet having highly twisted, evenly sheared, medium-length pile yarns. SALLOPED SELVAGE- A fabric defect consisting of an abrupt, narrow place along the selvage. Principal cause is the failure of the clip on the tenter frame to engage or hold the fabric. SCHAPPE- A yarn from partly degummed silk waste SCORCHING- The tendering of a fiber surface by heat so as to change the color and texture of the surface. SCOURING- An operation to remove the sizing and tint used on the warp yarn in weaving and, in general, to clean the fabric prior to dyeing. SCREEN- 1. A hollow, cylindrical, coarse-mesh wire device used in pickers and certain openers to form the loose staple stock into a sheet, or lap. The screen is mounted horizontally on a shaft on which it revolves freely. 2. A stencil used in screen printing. It is made of fine cloth, usually of silk or nylon, finely perforated in areas to form a design and mounted on a frame. The paste containing the dye is forced through the perforations onto the fabric, leaving the design. A series of screens, one for each color, is used for multicolored designs. (Also . PRINTING.) . SCREW FEEDS- Feed systems in which the action of the screw generates pressure that causes flow. The system usually consists of a container with a closely fitting screw unit. SCREW MELTER- 1. Screw extruder in which frictional forces between the screw and the heated barrel contribute to rapid melting of solid polymer. This configuration is capable of high throughput. 2. System in which a screw feed is used to feed polymer to a melt grid and to maintain a constant pressure at the grid. SCRIM- 1. A lightweight, open-weave, coarse fabric; the best qualities are made with two-ply yarns. Cotton scrim usually comes in white, cream, or ecru and is used for window curtains and as backing for carpets. 2. Fabric with open construction used as base fabric in the production of coated or laminated fabrics. SCROOP- The sound of rustle or crunch that is characteristic of silk. Scroop is a natural property of silk, but may be induced in other fabrics to a degree by various treatments. SCULPTURED- A term describing a carpet with areas of contrasting depth produced by mixing cut pile and loops. SEAMING- Joining the overlap of two pieces of fabric, usually near their edges. SEAMLESS- A term that describes a tubular knit fabric without seams, e.g., seamless hosiery. SEAM MARK- A particular type of pressure mark in the finished fabric. It is produced during finishing operations by the thickness of the seam used to join pieces for processing. SEAM SLIPPAGE- A defect consisting of separated yarns occurring when sewn fabrics pull apart at the seams. Seam slippage is more prone to occur in smooth-yarn fabrics produced from manufactured filament yarns. SEAM WELDING- Any stitchless procedure for joining fabrics based on the use of thermoplastic resins or the direct welding of thermoplastic materials. Seam welding is an alternative to conventional needle-and-thread seaming operations that is extremely popular in the nonwoven field. SECANT MODULUS- The ratio of change in stress to change in strain between two points on a stress-strain diagram, particularly the points of zero stress and breaking stress. SECONDARY BACKING- A layer of material, usually woven jute, polypropylene, vinyl, or latex foam, laminated to the underside of a carpet to improve body and dimensional stability. SECONDARY COLORS- Green, orange, and violet, each of which is obtained by mixing two primary colors. SECONDARY CREEP- The nonrecoverable component of creep. (Also DELAYED DEFORMATION) . SECOND-ORDER TRANSITION TEMPERATURE- The temperature at which the noncrystalline (amorphous) portions of polymer melt or become plastic. An inflection point or change is stress-strain properties occurs at this point; however, for most fibers, this change is small. SECONDS- 1. Imperfect fabrics (woven or knitted) containing flaws in the weave, finish, or dyeing, and sold as “seconds.” 2. YARN QUALITY. SECTION BEAM- 1. A large, flanged roll upon which warp yarn is wound at the beam warper in preparation for slashing. 2. Small flanged or unflanged beams assembled side-by-side on the shaft of a warp beam for further processing. SECTION MARK- A fabric defect consisting of marks running warpwise in an evenly repeating pattern, caused by the improper setting of sections in silk system (or indirect) warping. RSUCKER- Lightweight fabric, made of cotton or manufactured fiber, having crinkled stripes made by weaving some of the warp threads slack and others tight. Woven .rsucker is more expensive than imitations made by chemical treatment. SELF-TWIST YARN- An inherently twist-stable, two-ply structure having a ply twist that is alternately S- and Z- directed along the yarn. SELVAGE or SELVEDGE- The narrow edge of woven fabric that runs parallel to the warp. It is made with stronger yarns in a tighter construction than the body of the fabric to prevent raveling. A fast selvage encloses all or part of the picks, and a selvage is not fast when the filling threads are cut at the fabric edge after every pick. SEQUESTRANT- Any compound that will inactivate a metallic ion by forming a water-soluble complex in which the metal is held in a nonionizable form. This results in prevention of the usual precipitation reactions of the metal. SERGE- Any smooth-faced cloth made with a two-up and two-down twill weave. SERGING- 1. Overcasting the cut edge of a fabric to prevent raveling. 2. Finishing the edge of a carpet by oversewing rather than binding. Generally, the sides of a carpet are serged and the ends bound. SERICIN- Silk gum. The gelatinous protein that cements the fibroin filaments in a silk fiber. It is removed in the process called degumming. SERVED YARN- In aerospace textiles, a reinforcing yarn such as graphite or glass around which two different yarns are wound, i.e., one in the Z direction and one in the S direction, etc., for protection or compaction of the yarn bundle. SET MARK- A fabric defect consisting of narrow bars or bands across the full width of the fabric that may appear either as a tight, loose, or corduroy effect caused by loom stops improperly reset by the weaver. Set marks are sometimes caused by the weaver ripping out filling yarn and then not properly adjusting the pick wheel to obtain the proper relation between the fell of the cloth and the reed. SET POINT- An input in process control that defines the desired value or range of values of the variable that is being controlled.