Abstract: The present invention concerns a process for preparing a microfibrous multilayer composite material comprising: 1) realizing a non-woven microfibrous semi-finished product made up of microfibres of one or more polymers dispersed in a polyurethane matrix (semi-finished product IE); 2) cutting the semi-finished product lengthwise into two layers; 3) buffing at least one layer on one side (side N) so as to extract the microfibres and form the nap, thereby obtaining a semi-finished raw product; 4) cutting at least one semi-finished raw product lengthwise parallel to the surfaces, producing an non-woven intermediate product, containing the buffed side (side N) and a waste layer (containing the side that has not been buffed—side S); 5) coupling the non-woven intermediate product (on the side opposite side N) to a fabric made of polyethylene terephthalate fibres by means of the application of a thermoplastic polyurethane adhesive that can be cross-linked between the non-woven intermediate product and the fabric; 6)

Abstract: Disclosed is a shape memory polyamide, produced by adding a polyvalent carboxylic acid and a polyvalent amine when polyamide is polymerized from e-caprolactam or hexamethylenediamine and adipic acid, and having an aromatic component which is introduced by one or more among the polyvalent carboxylic acid and the polyvalent amine and has a total amount ranging from 0.4 mol % to 10 mol % based on the amount of the raw material for polyamide. Also, a method of producing a shape memory polyamide fabric using the shape memory polyamide is provided. The polyamide fabric produced using the shape memory polyamide is a highly functional fabric which does not easily wrinkle and easily recovers its original, shape even when wrinkled, and thus may be applied as material for various kinds of clothing.

Abstract: The invention relates to a process for producing safety textiles in one of the following colors: fluorescent yellow, fluorescent orange-red or fluorescent red. In a first step a textile starting material is pre-dyed in the desired color such that the pre-dyed fluorescent material has a specified first minimum luminance factor and the color is situated within an associated color diamond. After that the pre-dyed material is cross-dyed with a mixture of a luminescent pigment dye and a binder in such a way that the cross-dyed fluorescent material has a specified second minimum luminance factor and the color of the cross-dyed material continues to be situated within the color diamond. Subsequently the cross-dyed material is dried.

Abstract: Disclosed herein is a method for wash-protecting the color of artificially dyed keratin fibers comprising applying to the artificially dyed keratin fibers at least one drying oil or at least one composition comprising, in a cosmetically acceptable medium, at least one drying oil.

Abstract: In a deep dyeing process of a polyamide (PA) including Nylon 4, Nylon 6, Nylon 46, Nylon 66, Nylon 7, Nylon 8, Nylon 9, Nylon 610, Nylon 1010, Nylon 11, Nylon 12, Nylon 13, Nylon 612, Nylon 9T, Nylon 13, MC Nylon, Nylon MXD6, and all polyamide derivatives, and a polyolefin (PO) including ethylene copolymer, propylene copolymer and their derivatives, a compatibilizer precursor is used for modifying the polyamide and polyolefin of an amino, hydroxyl or epoxy group containing chemical, and then a reactive dye and/or an acid dye is used for dyeing the polyamide and polyolefin, so that the dyed polyamide and polyolefin have excellent dye fastness, light fastness, rubbing fastness, washing fastness and low-temperature dyeability to overcome the shortcomings of conventional nylon fibers including a poor dyeing effect, a non-level dyeing quality, a high dyeing temperature (100° C. to 120° C.) and a high cost.

Abstract: A method for dyeing a modified polyester fiber is provided. A polyester composition is melt blended with a modifying agent to form a thermoplastic composition. The modifying agent is an aliphatic-aromatic co-polyester, and present in an amount of about 1 to 16 parts by weight per 100 parts by weight of the thermoplastic composition. The thermoplastic composition is melt spun to obtain the modified polyester fiber, and the modified polyester fiber is dyed with a disperse dye at a temperature between about 100° C. and about 130° C.

Abstract: In a deep dyeing process of a polyamide (PA) including Nylon 4, Nylon 6, Nylon 46, Nylon 66, Nylon 7, Nylon 8, Nylon 9, Nylon 610, Nylon 1010, Nylon 11, Nylon 12, Nylon 13, Nylon 612, Nylon 9T, Nylon 13, MC Nylon, Nylon MXD6, and all polyamide derivatives, and a polyolefin (PO) including ethylene copolymer, propylene copolymer and their derivatives, a compatibilizer precursor is used for modifying the polyamide and polyolefin of an amino, hydroxyl or epoxy group containing chemical, and then a reactive dye and/or an acid dye is used for dyeing the polyamide and polyolefin, so that the dyed polyamide and polyolefin have excellent dye fastness, light fastness, rubbing fastness, washing fastness and low-temperature dyeability to overcome the shortcomings of conventional nylon fibers including a poor dyeing effect, a non-level dyeing quality, a high dyeing temperature (100° C. to 120° C.) and a high cost.

Abstract: This invention relates to a breast prosthesis which consists of a cup-shaped body of a non-rigid plastic material, which is welded into plastic films to obtain one or more chambers. In accordance with the invention, the filling material is colored with polymeric dyes. This invention furthermore relates to a method for coloring breast prostheses.

Abstract: In the case of fiber products, flame-retardant properties can be achieved by applying a polyethylenimine and a phosphonic acid to the fiber products or to precursors thereof. The fiber products may be sheet-like textile structures in the form of woven fabrics or they may be yarns or fiberboards. The precursors of the fiber products may be aqueous fiber suspensions which are further processed to give paper or fiberboards.

Abstract: A method for knitting denim comprising: dyeing yarn with a dyestuff to obtain dyed-yarn; knitting the dyed-yarn into a foundation layer and front layer to compose the denim, wherein the front layer is tensely tautened in intermittence with a tensile force greater than a tensile force on the foundation layer to make the foundation layer have random knots; and respectively washing two faces of the denim to remove the residual dyestuff. By knitting the yarn to compose the denim, the denim has even twilling patterns and excellent softness. By tensely tautening the front layer in intermittence during the knitting process, multiple random knots are generated on the foundation layer. Therefore, the achieved denim possesses multiple good features of softness, random knotting, and even twilling patterns.

Abstract: A method of producing seat belt webbing is proposed in which the webbing is first woven using at least two synthetic yarns of different colours of which at least one yarn is spun-dyed, and using weaves that are known per se, and that is distinguished in that the webbing is then subjected to treatment in a water-bath containing at least one disperse dye. Seat belt webbing produced in this way and seat belts containing such webbing are also claimed.

Abstract: This invention relates to a process of making high stretch elastic knitted fabrics from (PTT) which comprises: (a) making a drawn textured yarn with an elongation to break of 30 to 60 percent by: (i) spinning a polytrimethylene terephthalate polymer into a partially oriented yarn, and (ii) draw texturing the yarn in a false-twisting texturing machine at a draw ratio of 1.05 to 2.0, and a yarn temperature of 50 to 200° C. using a either a contact heater or a non-contact heater, and (b) knitting the yarn into a fabric composed of intermeshing loops of the yarn wherein the stitch length is from 22 cm/100 stitches to 26 cm/100 stitches, and (c) scouring the knitted fabric, and (d) drying the fabric on a belt, and (e) dyeing the knitted fabric at atmospheric pressure by dispersing a dye and the fabric in water and increasing the temperature, and (f) finishing the dyed knitted fabric according to the specific procedure and (g) drying the fabric on a belt.

Abstract: The present invention provides a sculptured pile fabric having both a printed pattern and a sculpted surface of various pile heights. The fabric of the present invention has improved aesthetic qualities as compared with sculptured products of the prior art. This improved sculptured fabric is the result of a chemical sculpting method, in which the height of the pile surface is selectively reduced in a pattern configuration, and that is followed by an overall “dilute” dyeing process. This “dilute” dyeing process is similar to that used to “tea stain” textile products, wherein an overall hue is imparted to a textile by the use of a relatively dilute (low concentration) dyestuff. The resulting sculptured product has an appearance that emphasizes the sculptured areas, making the sculptured areas appear to have greater depth, especially when viewed at a distance.

Abstract: To provide a method for processing a cloth to form a three-dimensional design pattern on the cloth not only by a conventional printing system, but also by an ink-jet system. A method for processing a cloth to form a three-dimensional design pattern on the cloth, which involves two processes—one in which it is treated with a Solution A containing a salt formed from a phenol derivative and a hydroxide of an alkali metal or alkali-earth metal and the other in which it is treated with Solution B containing a chemical capable of restoring the salt in solution A to its original phenol derivative. The present invention is advantageous in using highly safe water-soluble chemicals, allowing their uniform application to a cloth to form a three-dimensional design pattern on the cloth.

Abstract: Bulk yarns having improved elasticity and recovery and methods for their manufacture are described. A first embodiment of the invention involves providing a solution-dyed multifilament yarn of polybutylene terephthalate (PBT) and a multifilament yarn of a second thermoplastic polymer to an air jet texturizer such that the PBT component forms a core and the other yarn forms a plurality of loops and coils extending outwardly from the core. In addition to a high degree of elasticity and recovery, the composite yarn also has a low amount of shrinkage, which enables the yarns to be used in the production of woven fabrics without significant losses in fabric yield. Another embodiment of the invention involves false twisting a multifilament PBT yarn and a second multifilament yarn as individual threadlines to impart crimp thereto, then entangling the two components together using an air interlacing jet, to produce a bulk yarn having high elasticity and recovery.

Abstract: Textile materials having high colorfastness, and methods for their production are described. The process involves heatsetting a textile material, then applying a polysiloxane/catalyst combination to the heatset material. The textile material is then dried at low temperature, thereby resulting in a material having good colorfastness and shade. The process can be used to process fibers, yarns or fabrics, and is particularly useful in the processing of microdenier fibers.

Abstract: Stabilized solution-dyed fiber is made by melting a polyamide which is amide monomers polymerized in the presence of at least one hindered piperidine compound, coloring the melted polyamide, and spinning the colored polyamide into fibers that have about 40% or better retained tenacity after 2125 kJ exposure to xenon arc radiation as per AATCC Test Method 16-1993, “Colorfastness to Light,” Option E. Copper stabilizers are unnecesssary.

Abstract: A polyolefin composition having enhanced dyeing capabilities containing: (a) a polyolefin; (b) from 0.01 to 10% by weight, based on the weight of the polyolefin in, of a migratable amphiphile, excluding phenolic and sulfur-containing stabilizers and n-octyl phenyl salicylate; and (c) from 0.01 to 1000 ppm of a transition metal, based on the weight of the polyolefin.

Abstract: Polymer blend fibers having a phase separation structure are provided. The phase separation structure is a sea-island structure and a diameter D1 on a circle basis of an island phase of the sea-island structure in a transverse cross-section of the fibers is in the range of 0.001 to 0.4 &mgr;m.

Abstract: A rug exhibiting a wool-like appearance made by the process comprising the steps of a. extruding a dyeable polyolefin resin comprising the reaction product of a polypropylene and an ethylene alkyl acrylate copolymer to provide an extruded fiber; b. drawing the extruded fiber by conveying the fiber among a system of unheated and heated godets; c. crimping the drawn fiber by passing the fiber into a texturing jet utilizing hot air; d. twisting at least two separate drawn and crimped fibers to provide a multi-ply carpet face yarn wherein the yarn is from about 1000 to about 8000 denier and has about 2 to about 7 twists per inch; e. heat-setting the multi-ply yarn; f. dyeing the multi-ply yarn using a space-dyeing process; and g. weaving the dyed yarn into a rug; thereby providing a rug with a wool-like appearance. The invention also provides a process for making a rug with a wool-like appearance.

Abstract: This invention concerns a composition comprising a blend of polyolefin with the reaction of a functionalized polyolefin and polyetheramine in which the polyetheramine is grafted into the functionalized polyolefin in a customary mixing apparatus. A process for producing the reaction product of functionalized polypropylene and polyetheramine by melting with polypropylene in a customary mixing apparatus is also disclosed. Blends of the present invention are advantageously useful to prepare paintable automotive body parts. This invention further includes dyeable polyolefin compositions containing the reaction product of functionalized polyolefin and polyetheramine. Dyeable polyolefin fibers, including polypropylene fibers, are disclosed, which may be made by melt spinning, and which may be employed to make woven and non-woven fabric.

Abstract: The invention is a method of coloring melt spun condensation polymers while avoiding hydrolytic degradation and maintaining the melt viscosity of the polymer. The method includes adding a liquid dispersion of a colorant to the melt phase of a condensation polymer, and in which the amount and type of the liquid in the dispersion will not substantially affect the melt viscosity of the condensation polymer; and thereafter spinning the colored melt phase condensation polymer into filament form. In another aspect the invention is a polyester filament including polyethylene terephthalate, a colorant, and a nonaqueous organic liquid that is soluble in melt phase polyester, and has a boiling point above 300.degree. C., but that otherwise does not modify the polymer chain.

Abstract: A dyed braided suture is formed by dry blending a colorant and a thermoplastic resin; extruding the blend by melt spinning to form filaments; drawing the filaments, braiding the drawn filaments and converting the braided filaments to a suture.

Abstract: A method for finishing a cellulose fiber-containing textile fabric comprises treating a cellulose fiber-containing textile fabric with liquid ammonia, applying a resin finishing agent to said fabric, subjecting subsequently to either or both of a hot calendering treatment and a heat treatment, and finally treating the resultant fabric with hot water. The resultant fabric keeps its shape stability including a crease or shrink resistance when washed, without involving any problem on residual formaldehyde.

Abstract: This invention concerns a composition comprising a blend of polyolefin with the reaction of a functionalized polyolefin and polyetheramine in which the polyetheramine is grafted into the functionalized polyolefin in a customary mixing apparatus. A process for producing the reaction product of functionalized polypropylene and polyetheramine by melting with polypropylene in a customary mixing apparatus is also disclosed. Blends of the present invention are advantageously useful to prepare paintable automotive body parts. This invention further includes dyeable polyolefin compositions containing the reaction product of functionalized polyolefin and polyetheramine. Dyeable polyolefin fibers, including polypropylene fibers, are disclosed, which may be made by melt spinning, and which may be employed to make woven and non-woven fabric.

Abstract: The specification describes a process of making a fiber for a carpet face yarn, the yarn being made of polyolefin/polymer filaments which contain a plurality of longitudinally dispersed relatively small, short polymer fibrils inside the filaments generally concentrated toward the center thereof within the polyolefm matrix. The yarn has the stain resistant properties of polyolefm based yarns and the resiliency of polyamide based yarns at a substantially lower cost than nylon carpet yarns.

Abstract: A method of making a dyed nylon walk-off mat having improved washfastness includes dyeing nylon yarn, or a tufted nylon mat, in a fiber reactive dye solution having a pH in the range of about 0.5 to about 2.5. The yarn is then heated, such as by steam, at a temperature above 200.degree. F., after which the yarn is treated with an alkaline solution followed by a heat treatment. A backing, such as of rubber or vinyl, is applied to the mat at an elevated temperature. The application of the backing at elevated temperature, and the heat treatment subsequent to application of the alkaline solution, may be performed simultaneously.

Abstract: Dyed cellulosic regenerated elongate members such as fibers are produced by dyeing the regenerated members with a cationic direct dye after formation but before first drying. A method of producing the dyed elongate members comprises forming a dope containing cellulose or a cellulose compound in solution in a solvent, extruding the dope through at least one orifice into a bath containing water to form an elongate extrudate from which solvent is dissolved and/or the cellulose compound is converted to cellulose so as to form the elongate member, dyeing the formed but never dried elongate member with a cationic direct dye and optionally also with an anionic direct dye and then drying for the first time the dyed elongate member.

Abstract: The specification describes a conjugate carpet face yarn including trilobal or delta cross-section polyolefin filaments and a plurality of generally co-linear smaller polyamide fibrils embedded within the polyolefin filaments. This yarn has the stain resistant properties of polyolefin based yarns and the resiliency of polyamide based yarns.

Abstract: A process is disclosed for providing a solvent-spun cellulose fibre with a reduced fibrillation tendency. The fibre is treated with a chemical reagent, preferably substantially colourless, having 2 to 6 functional groups reactive with cellulose, suitably dissolved in an aqueous solution.

Abstract: Compositions of ethylene alkyl acrylate grafted onto polypropylene are dyeable with disperse or cationic dyes. A small amount of polyester may be include, along with a hydrophilic modifier comprising a monoglyceride and a salt of a liner alkyl. The hydrophilic modifier also acts as a compatibilizer to bridge the polyester and the polypropylene. A process for dyeing polypropylene fibers comprises combining the polypropylene with a thermoplastic copolymer of ethylene and alkyl acrylates having 1 to 4 carbon atoms in the alkyl group into fibers, adding the polyester to the polypropylene matrix, spinning the composition into fibers, and exposing the fibers to a dye bath. The sulfonic group may be added to the polyester for exposing the fibers to a cationic dye.

Abstract: Disperse dyeable compositions of ethylene alkyl acrylate grafted onto polypropylene are provided. A process for disperse dyeing polypropylene fibers is provided. This process comprises (a) extruding the polypropylene with about 2 to 10% by weight of a thermoplastic copolymer of ethylene and alkyl acrylates having one to four carbon atoms in the alkyl group into fibers, and (b) exposing the fibers to a disperse dye bath containing a selected disperse dye.

Abstract: Described is a process for the manufacture of polyamide fibers having improved dye washfastness and heat stability by melt mixing a fiber forming polyamide with an additive such as water, an alcohol, an amine and a heat stabilizer such as a phenolic compound or a phosphite containing aryl groups or a mixture thereof to form a homogeneous mixture, melt spinning polyamide fibers, quenching, drawing and taking up the polyamide fibers.

Abstract: Disperse dyeable compositions of ethylene alkylacrylate grafted onto polyolefin (isotactic polypropylene) are provided. A process for disperse dyeing polyolefin (isotactic polypropylene) shaped into articles such as fibers is provided. This process comprises (1) extruding the polyolefin with about 2 to 30 percent by weight of a thermoplastic copolymer of ethylene and alkylacrylates having one or four carbons in the alkyl group into fibers, and (2) exposing the fibers to a disperse dye bath containing a disperse dye.

Abstract: Disclosed are a reversibly variable color pattering composition for synthetic resin articles which includes a granulated material containing (i) an olefin polymer and (ii) at least one reversibly variable color material selected from the group consisting of thermochromic materials and photochromic materials, the granulated material having been subjected to crosslinking reaction following granulation; a method of producing the same; and a shaped article having a reversibly variable color pattern as molded from a molding composition including a synthetic resin and the color patterning composition.

Abstract: An improved process for melt spinning a pigmented hexamethylene adipamide fiber from a melt blend of a polymer and a colored pigment wherein the polymer is a random interpolyamide or a block polymer having two different difunctional recurring amide-forming moieties other than those which form hexamethylene adipamide is disclosed along with pigmented hexamethylene adipamide polymer fibers having tenacities greater than 7.5 or even 8 grams per denier.

Abstract: A fire-proof buri filament material making process includes steps of obtaining buri fibers by dipping a smashed rattan buri in a salt and dilute hydrochloric acid solution, drying the buri fibers, dipping the well-dried buri fibers in a heated hydrogen peroxide dilution, boiling the buri fibers in a pigment dye, glycerin and soda water solution, dipping the colored buri fibers in a solution containing ammonium phosphate and borax at the ratio of 3:1 for 30 minutes in forming into buri filaments, drying the buri filaments and cutting them into the desired length and binding them up with iron wires in forming into bunches of buri filaments. The invention also relates to the buri filaments made according to the aforesaid process.

Abstract: The process for chemically modifying metal-free, organic material for improving one or more properties thereof such as water dispersibility, compatibility with other organics, or increased chemical reactivity, wherein the process includes providing material with from 1-6 sulfonylhalide groups or sulfonate ester groups or mixtures thereof, and contacting the material under sulfonamido forming conditions with one or more reactants containing one or more poly(oxyalkylene) moieties, each of the reactants having from 1 to 4 functional amine groups, and each of the poly(oxyalkylene) moieties being comprised of from about 4 to about 200 epoxide reactant residues at least about 50 mole percent of which residues contain 2-4 carbons.

Abstract: Poly(p-phenylene terephthalamide) (PPD-T) fibers which have been dried are dyed with cationic dyes, or with disperse or acid dyes, by heating the fibers under a high pressure from 29 to 108 psi and at a temperature from 130.degree. to 180.degree. C.

Abstract: An improved process for melt-spinning a pigmented hexamethylene adipamide fiber from a melt blend of a polymer and a colored pigment wherein the polymer is a random interpolyamide or a block polymer having two different difunctional recurring amide-forming moieties other than those which form hexamethylene adipamide is disclosed along with pigmented hexamethylene adipamide polymer fibers having tenacities greater than 7.5 or even 8 grams per denier.

Abstract: Synthetic textiles containing a photochromic pigment. The pigments are prepared by encapsulating a photochromic pigment in a thermoplastic polymer having a high melt flow index, mixed with a primary thermoplastic resin, and extruded at a temperature of less than 250.degree. C. through a spinnerette having a diameter of at least 0.3 ml.

Abstract: Process for rendering a plastic identifiable by adding 5 to 10,000 ppb of a fluorescent marker to the plastic during or after is manufacture.

Abstract: Excellent color stabilization as well as integrity is obtained in thin film and fibers exposed to bright sunlight at relatively high temperature, in polyolefin (PO) articles pigmented with blue and green phthalocyanine, and red azo and disazo pigments. The pigment is combined with two `large molecule` primary stabilizers, the first a piperidyl-based (PDYL) hindered amine light stabilizer (HALS), and the second, a 3,5-disubstituted-tert-butyl-4-hydroxybenzoate (3,5-DHBZ). The first contains at least two polysubstituted piperidyl rings in its molecule; the second is a hindered phenol with an ester group in the para- position. Stabilization of the PO's color is obtained for as long as the PO articles themselves are stabilized by the combination of primary stabilizers, typically, their useful life. With the combination, the pigmented articles are not only thermooxidatively and light-stabilized, but there is exceptionally low color fade.

Abstract: Dyeable fibers are formed from polypropylene by blending a major portion of polypropylene with a minor portion of 1) a copolymer of nylon 6,6 and substantially equimolar amounts of hexamethylene diamine and an alkali metal salt of 5-sulfoisophthalic acid or 2) a basic reaction product of substantially equimolar amounts of N-(2-aminoethyl) piperazine and adipic acid, hexamethylene diamine and adipic acid and optionally .epsilon.-caprolactam. The blend is formed in an extruder and extruded into filaments which are quenched in air, stretched 2-4.times. (preferably at an elevated temperature) and bulked using a jet of heated turbulent fluid. The thusly bulked filaments are then dyed.

Abstract: A method of coloring a polycarbonate extruded or molded product for optical members, which is colored by a liquid coloring process for obtaining a colored polycarbonate extruded or molded product for optical members by extrusion or injection molding. The process involves mixing a polycarbonate resin for optical members and a liquid coloring agent dispersion obtained by dispersing a coloring agent in a dispersing agent. The dispersing agent includes a specific saturated fatty acid ester or silicon oil. After mixing the polycarbonate resin and liquid coloring agent dispersion, the resulting mixture is melted and thereafter extruded or molded to form a product for optical members.

Abstract: Improved fabrics of fibers of a copolymer of ethylene terephthalate/hexahydroterephthalate containing a high proportion of hexahydroterephthalate are obtained by processing the fabrics and fibers within critical temperature ranges.

Abstract: A process is described which permits synthetic chamois pelts entirely similar to natural pelts to be obtained; the process consists in starting from any known synthetic sheet material of the type formed by a porous polyurethane matrix having synthetic fibres embedded therein and a covering skin layer of compact polyurethane resin applied to one face of the matrix, and in splitting it into two layers, a first identical to the starting material, that is provided with the matrix and the covering layer, but thinner, and a second composed only of the matrix, and in then subjecting this latter, after buffing, to a dyeing operation performed with textile technology, followed by a folding phase also typical of textile treatment, and by possible stamping and re-buffing phases.

Abstract: A process for providing a design patterns in a material wherein a selected medium is applied to the material, the material being positioned adjacent a surface of a template which surface has selected surface characteristics either topographical or non-topographical in nature. The material is held against the template surface at a selected pressure and for a selected time period, at least a portion of the medium coming into contact with the template surface, the adhesive and conesive forces of the material, the medium, and the template interacting with each other to generate a unique design relief pattern on the surface of the material which pattern differs from the pattern characteristics of the template. The material is then suitably dried. The viscosity and amount of the medium, as well as the pressure used, are selected to lie within specified ranges to produce heavy or light relief patterns on permeable or non-permeable materials.

Abstract: A process for forming crepe fabrics on a shuttleless loom is provided which includes temporary stabilization of highly twisted (e.g., 40-70 TPI) filament yarn. To this end, hot melt size is applied at a predetermined temperature in predetermined amounts (e.g., add-on of about 10.5-13.5%) immediately after twisting so as to reduce the liveliness of the yarn and to thereby permit it to be woven. After weaving, the yarn stabilization is reversed by a desizing operation. The fabric is subsequently heat treated to develop crepe characteristics.

Abstract: A method of making a dyed nylon walk-off mat having improved washfastness includes dyeing nylon yarn, or a tufted nylon mat, in a fiber reactive dye solution having a pH in the range of about 0.5 to about 2.5. The yarn is then heated, such as by steam, at a temperature above 200.degree. F., after which the yarn is treated with an alkaline solution followed by a heat treatment. A backing, such as of rubber or vinyl, is applied to the mat at an elevated temperature. The application of the backing at elevated temperature, and the heat treatment subsequent to application of the alkaline solution, may be performed simultaneously.