A relative term for crimp that is either too low or too high in frequently and/or amplitude or that has been put into the fiber with improper angular characteristics.
abraded yarns
Continuous filament yarns in which filaments have been cut or abraded at intervals and given additional twist to produce a certain degree of hairiness, so as to simulate the character of yarns spun from staple. Abraded yarns are usually plied or twisted with other yarns before using.
abrasion
The wearing away of a solid surface film by friction.
abrasion mark
An area where a fabric has been damaged by friction.
abrasion resistance
The ability of a fiber or fabric to withstand surface wear and rubbing. The ability of a fiber or fabric to withstand surface wear and rubbing.
abrasive
A material used to scour, scrub, or polish. Abrasive particles are used in such products as cleaners, pumice stone, scouring pads, and hand cleaners.
abrasive action
Cutting, tearing, shredding, scoring, fibrillating effect of abrasives on carpet fibers.
abrasive wear
The wearing away of the pile surface of a carpet by friction created by walking or rolling traffic. Wearing away the surface pile by traffic or other types of friction generated by use.
absolute
A chemical substance that is not mixed (i.e., pure). An example is absolute alcohol, with is ethyl alcohol, 99% pure, containing not more than one percent by weight of impurities.
absorbance
The ability of a substance to transform radiant energy into a different form, usually with a resulting rise in temperature. Mathematically, absorbance is the negative logarithm to the base 10 of transmittance.
absorbency
The ability of one material to take up another material.
absorbent
A material that attracts substances from a surface itself. Absorbents are used in carpet cleaning, spotting, concrete cleaning, and spill control.
absorbent compound
A minimum moisture method of interim cleaning in which, following
dry soil removal (vacuuming), a compound consisting of a granular carrier (cellulosic or polymer based) that has been saturated with cleaning agents, in broadcast (sprinkled) onto soiled carpet. The compound is uniformly distributed into the pile using equipment with two counter-rotating brushes; or with a machine employing rotary brush action. the detergent saturated compound suspends soil and dries within one to three hours; during which time the suspended soil is absorbed into the carrier. Dry vacuuming removes the remaining carrier, along with the soil absorbed by, or attached to it. Also called “powder cleaning.”
absorbent pad cleaning
A minimum moisture method of interim cleaning in which, following
dry soil removal (vacuuming), detergent solutions are sprayed onto the carpet pile and onto an absorbent pad or “bonnet” made of cotton, rayon, or combination thereof. Using a rotary shampooer with a drive block instead of a brush, the solution is “spin buffed” into the carpet pile with the bonnet absorbing soil from the surface of the carpet as cleaning progresses. When on side of the bonnet becomes soil saturated, it is turned over and cleaning progresses. When one side of the bonnet becomes soil saturated, it is turned over and cleaning continues. When both sides of the bonnet become soil saturated, the bonnet is exchanged for a clean one or the bonnet is rinsed in a wringer bucket before work continues. Also known as bonnet cleaning
absorption
1. the property of a fiber, yarn or fabric which enables it to attract and hold gases or liquids within it’s pore by capillary, osmotic, solvent, or chemical action (See adsorption). 2. To take a substance into the body through surfaces such as the lungs, gastrointestinal tract, or skin, and ultimately into body fluids or tissues. The process of gasses or liquids being taken up into the pores of a fiber, yarn, or fabric (Also see absorption).
accelerant
A chemical used to speed up chemical or other processes. Accelerants are used in dyeing triacetate and polyester fabrics.
Acetate fiber
A low-cost, man-made (regenerated cellulose) fiber made by treating wood pulp with acetic acid, acetic anhydride and acetone, to produce a viscous, honey-colored liquid, which is extruded and hardened to form filaments. Acetate has good sun resistance and low moisture absorbency (dries rapidly, resists shrinkage), and is used in upholstery fabric, particularly as a blended fiber, and in lamp shades. It is easily abraded and weakened by strong solutions of alkalis, acids, and oxidizing bleaches. Acetate is dissolved completely by acetone (nail polish remover.
acetic acid
A volatile, colorless, pungent liquid acid (C2H402) that is the chief acid of white vinegar (5% acetic, pH 3) and is used in the synthesis of acetate fiber. Many acid spotters are comprised of 5% - 7% acetic acid.
acetic anhydride
Anhydrous acetic acid (CH3C0)20. It is used in the acetylation process in the manufacture of cellulose acetate.
acetone
A volatile, flammable dry solvent (C3H60) used primarily to dissolve synthetic resins, such as nail polish, airplane glue, acrylic paint, etc. Acetone dissolves acetate fiber instantly!
acetone recovery
A process for reclaiming the acetone solvent from acetate fiber or plastics manufacture. Usually the recovery process consists of adsorption by activated carbon and redistillation.
ACH (air exchange rate)
Air Changes per hour. The speed at which outside air replaces indoor air. When there is little infiltration , natural ventilation, or mechanical ventilation, the air exchange rate is low and pollutant levels can increase.
acid dye blocker
An anionic napthalated phenolic compound used to balance the cationic polarity of the amine groups at the ends of nylon polymers (to block open dye sites), thereby reducing or eliminating the affinity between the fiber and foreign acid dyestuffs that are commonly found in household foods and beverages.
acid dyeable
Nylon polymer that has been modified chemically to make the fiber receive acid dyes. A class of dyes with excellent colorfastness when used with type 6,6 nylon. Acid dyeable yarns are available in different dye levels (i.e., light, medium, and deep).
acid dyes
A class of dyes used on wool, other animal fibers, and some manufactured fibers. Acid dyes are seldom used on cotton or linen since this process requires a mordant. Acid dyes are widely used on nylon when high washfastness is required. In some cases, even higher washfastness can be obtained by aftertreatment with fixatives. Negatively charged coloring material used primarily on nylon carpet fibers. See Dyes.
acid fading
See gas fading.
acid recovery
A reclamation process in chemical processing in which acid is extracted from a raw material, by-product, or waste product. In the manufacture of cellulose acetate, acetic acid is a major by-product. Acid recovery consists of combining all wash water containing appreciable acetic acid and concentrating it to obtain glacial acetic acid.
acid resistance
The property of withstanding contact or treatment with any acids normally encountered in use. The type of acid should be stated (i.e., organic or inorganic).
acid-dyeable variants
Polymers modified chemically to make them receive receptive to acid dyes.
acidic
A term describing a material having a pH of less than 7.0 in water.
acoustic absorption
The ability of a floorcovering to reduce (absorb) impact noise and its transmission to other surfaces (e.g., subflooring). 1. A synthetic, thermoplastic, fiber that contains at least 85% by weight of acrylonitrile units. It is used primarily in clothing, blankets and upholstery fabrics. Like wool, acrylic has good bulking and insulating properties. In plush carpet styles, it exhibits severe pile reversal along the edges of traffic lanes, and it lacks resiliency. As an upholstery fabric (usually latex backed) it performs very well and even resists damage from oxidizing bleaches, and dilute alkalis and acids. Common trade names include: Acrilan, Creslan, Orlon, and Zefran. 2. A synthetic polymer upon which floor finishes may be based.
acrylic fiber
A manufactured fiber in which the fiber forming substance is any long chain synthetic polymer composed of at least 85% by weight of acrylonitrile units (-CH2-CH (CN)-) (FTC definition). Acrylic fibers are produced by two basic methods of spinning (extrusion), dry and wet. In the dry spinning method, material to be spun is dissolved in a solvent. After extrusion through the spinneret, the solvent is evaporated, producing continuous filaments which later may be cut into staple, if desired. In wet spinning, the spinning solution is extruded into a liquid coagulating bath to form filaments which are drawn, dried, and processed. CHARACTERISTICS: Because acrylic fibers are thermoplastic, fabrics may be heat-set for wrinkle resistance and to provide permanency to pleats. Acrylic fabrics have low moisture absorbency and dry relatively quickly. In general, acrylic fibers are resistant to the degrading effects of ultraviolet rays in sunlight and to a wide range of chemicals and fumes. They provide warmth in fabrics which are lightweight, soft, and resilient. Acrylic fibers have relatively poor flame resistance compared with other fibers. Some acrylic fabrics, particularly knit types, approximate the hand of fine wool. Because of the composition and cross section of the fiber, fabrics made there from have a high bulk to weight ratio. This is further enhanced with the so called “high bulk” spun yarns. (See man-made fibers) a synthetic fiber made by polymerization of acrylonitrile, usually with other monomers.
acrylic resin
A polymer of acrylonitrile, used in production of manufactured fibers, as a fabric finish and as a size.
acrylic styrene
A popular type of polymer blend for floor finishes.
acrylics
A generic term including acrylic and modified acrylic (modacrylic) fibers. Acrylic is a polymer composed of at least 85 percent by weight of acrylonitrile: modacrylic is a polymer composed of less than 85 percent but at least 35 percent by weight of acrylonitrile. Acrylic and modacrylic carpet fibers. Acrylics come only in staple form and are noted for their high durability and stain-resistance.
The trademark owned by Patchogue Plymouth Division of Amoco Fabrics Company for a leno weave of slit film and spun polypropylene yarns that form a stretchable, all-synthetic secondary backing fabric.
A highly absorbent form of granular carbon treated with high temperature and used to remove odors and toxic substances from liquids or gases, through adsorption or filtration. See adsorption.
An adverse effect on a human or animal body, with severe symptoms developing rapidly and coming quickly to a crisis. Examples include: dizziness, nausea, skin rashes, inflammation, tearing of eyes, unconsciousness, and even death.
A single exposure to a toxic substance which results in biological harm or death soon after a single dose of, or exposure to a substance. Any severe poisonous effect resulting from a short-term exposure. Ordinarily this term is used to denote effects observed in experimental animals.
Changes in an organisms structure or behavior that helps it adjust to its surroundings. An increase or decrease in sensitivity to a given stimulus which occurs as a result of exposure to that stimulus.
A reaction yielding a polymer in which the molecular formula of the repeating unit is identical with that of the monomer. The molecular weight of polymer so formed is a simple sum of the molecular weight of the combined monomer units. Combination occurs by means of rearrangement of the chemical bonds.
A supplementary material combined with a base material to provide special properties. For example, pigments are used a dope additives to give color in mass dyeing.
Molecular attraction that holds the surfaces of two substances in contact. The force that holds different materials together at their interface and resist separation into two layers.
Products used to treat the smooth fiber face of closely constructed base fabric to provide a chemical bonding site for subsequent coating. This step is done because it is difficult to get good coating adhesion via strikethrough and mechanical bonding in closely constructed fabrics. Products containing the isocyanate group are the most widely used promoters. (Also see dip treating).
In nonwovens, the movement of adhesive together with its carrier solvent in a fabric during drying, giving it a non uniform distribution within the web, usually increasing to the outer layers.
The two terms, adhesive and cement, are used interchangeably in the carpet installation trade. They apply to a total line of bonding materials, sealers, seam welding agents used on the carpet, the carpet padding, the seaming tapes, hardware and trim. They can be categorized generally as: Carpet Adhesive: For directly attaching the underside of carpet to the subfloor surface. For jute or man-made backs or plain backcoated: Use water emulsion, synthetic rubber base, nonflammable. For rubber backs (foam or sponge): Use water emulsion, synthetic rubber base, non-flammable. For the above two special formulations with a strippable feature, water emulsions, non-flammable, must be applied to prepared, smooth non-porous subfloor surface. The adhesive attaches more securely to the carpet backing surface than to the floor. If the application has been done correctly it will come up with the carpet. For vinyl-back carpet: Use water emulsions of elastic resins, compatible with vinyl plasticizers, nonflammable. Cushion adhesive: For anchoring cushions (lining, padding, underlay) to subfloors to prevent slipping during carpet stretching operation. Solvent, rubber base, flammable. Seaming Cement: For seaming (with tapes), binding, for prevention of raveling of conventional carpeting (without cushion backing). Water emulsion, rubber latex, nonflammable. Tackless strip cement: For anchoring tackless strip to subfloor (often used in conjunction with mechanical fasteners as extra insurance against loosening). Solvent, rubber base, contact cement, flammable. Seam sealer: For welding together the backing along seams and joints of rubber type foam and sponge back carpet. Solvent, rubber base, flammable. Vinyl back, seam welding (or sealing) Solvent: For fusing together the backing along seams and joints of vinyl-backed carpets. Solvent, rubber base, flammable, toxic.
1, 4-butanedicarboxylic acid (COOH (CH2)4COOH). It is used in the polymerization reaction to form nylon 66 polymers and in the manufacture of polyurethane foams. A primary ingredient in the production of 6,6 nylon. Adipic acid has a chain of 6 carbon atoms and is reacted with hexamethylene diamine (also with 6 carbon atoms, hence the term “type 6,6”) to polymerize type 6,6 nylon.
Polymer, resin, or other matriz-material system in which reinforcement is accomplished via high-strength, high-modulus materials in continuous filament form or in discontinuous form such as staple fibers, fibrets, and insitu dispersions. (Also see composite).
Any abnormal, harmful, or undesirable effect on the physical, biochemical, biological and/or behavioral well being of a person, as a result of exposure to a pollutant or pollutants in the environment.
A suspended liquid or solid particle in a gas (e.g., air). A fine aerial suspension of particles sufficiently small in size to confer some degree of stability from sedimentation, i.e., fog or smoke.
Compressed or vapor in a container which upon release of pressure and expansion through valve carries another substance from the container. Examples: butanes, propane, nitrogen, fluorocarbons and carbon dioxide.
The Afshar rug is made by nomads or semi-nomads. Afshar rugs often have a foundation of cotton. The Afshars sale the rugs in Kirman in exchange for cotton. The pile is wooland the design is often composed of diamonds with stylized flowers covering the whole central field. The colors vary, but the background is usually red or blue. White or cream-colored woolisanother feature of the Afshar rug.
Any treatment done after fabric production. In dyeing, it refers to treating dyed material in ways to improve properties; in nonwovens, it refers to finishing processes carried out after a web has been formed and bonded. Examples: embossing, creping, softening, printing, and dyeing.
1. Deterioration of textile or other materials caused by gradual oxidation during storage and/or exposure to light. 2. The oxidation stage of pulp. 3. Originally, a process in which printed fabric was exposed to a hot, fabric in moist steam in the absence of air. Aging is also used for the development of certain colors in dyeing, e.g., aniline black.
A mixture of gasses constituting a compressed fluid tied to the planet by gravitational attraction. Air is 79% nitrogen, 21.9% oxygen, and less than .1% a mixture of carbon dioxide, argon, helium and hundreds of other gasses originating from natural and manmade sources.
The appropriate distribution and delivery of proper quantities of air to building space. Generally this includes, but is not limited to, mixing fresh (outside) air with air that is recirculated through a building’s HVAC system.
Volume of air moved in one hour. One air change per hour in a room, home or building means that all the air in each of those environments will be replaced in one hour.
An IAQ control strategy to remove various airborne particulates and/or gasses from the air. The three types of air cleaning most commonly used are: particulate filtration, electrostatic precipitation, and gas sorption. See air conveyance system.
1. A chemical process for sealing short, fuzzy fibers into a yarn. Fabrics made from air conditioned yarns are porous. Because they allow more air circulation, these fabrics are also cooler. 2. Control of temperature and/or humidity in work or living space.
A process of any combination (up to 15 plies) of solid color yarn ends are passed through an air jet box which blows a high pressure intermittent jet of air past the yarn, mingling the fine hair-like filaments into one homogeneous bundle, which takes on a color of its own. This process has allowed for great expansion of color flexibility. (also air-interlacing or commingling) A system for producing yarn from BCF singles (primarily polypropylene or nylon), in which fibers are locked together (entangled) in nodules by jets of air.
Expresses in two ways: 1. The speed (number of times) outdoor air replaces indoor air expressed in air changes per hour (ACH). When there is little infiltration, or natural or mechanical ventilation, the air exchange rate is low and pollutant levels can increase. 2. The number of times the ventilation system replaces the air without a room or area within a building.
a spinning system in which yarn is made by wrapping fibers around a core stream of fibers with compressed air. In this process, the fibers are drafted to appropriate sliver size, then fed to the air jet chambers where they are twisted, fir in one direction, then in the reverse direction in a second chamber. They are stabilized after each twisting operation.
A respirator that is connected to a compressed breathing air source by a hose of small inside diameter. The air is delivered continuously or intermittently in sufficient volume to meet the wearer’s breathing requirements, and meet OSHA breathing air standards. cp atmospheric supplying respirator
A respirator that uses chemicals to remove specific gasses and vapors from the air, or that uses a mechanical filter to remove particulate matter. An air purifying respirator must be used only when there is sufficient oxygen to sustain life, and the air contaminant level is below concentration limits of the device.
A class of colorless, volatile, flammable, organic dry solvents containing one or more hydroxy groups (OH). Alcohols are used as co-solvents in some cleaning or spotting compounds. The alcohols commonly used in light duty and liquid laundry detergents are isopropanol or ethanol (ethyl alcohol). In detergents they control viscosity, act as solvents for other ingredients, and provide resistance to freezing temperatures encountered in shipping, storage and use. Alcohols (isopropyl and ethyl) also may be used in a 60-90% concentration for disinfecting.
