US3583878A - Surface modifying treatment of polyester fiber articles to impart soil-release properties thereto - Google Patents

Surface modifying treatment of polyester fiber articles to impart soil-release properties thereto Download PDF

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US3583878A
US3583878A US758999A US3583878DA US3583878A US 3583878 A US3583878 A US 3583878A US 758999 A US758999 A US 758999A US 3583878D A US3583878D A US 3583878DA US 3583878 A US3583878 A US 3583878A
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fiber
copolyester
polyester
percent
drawn
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Gazie K Ragep
Wesley L Miller
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GAZIE K RAGEP
WESLEY L MILLER
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WESLEY L MILLER
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/507—Polyesters

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  • This invention relates to surface modified polyester filament, staple, yarn, and to fabric and other fiber articles formed therefrom having unusual and durable soil-release and anti-redeposition properties and to a process for providing such surface modified fiber articles.
  • the fiber article is wetcoated with a water insoluble copolyester of a polyoxyalkylene glycol and a polyester having ester units chemically identical to, or cocrystallizable with the ester units present in the polyester fiber to be treated.
  • the copolyester is fixed to the fiber surfaces by heat treatment.
  • the chemically identical units in the copolyester and in the fiber surface cocrystallize to effect the bond.
  • Polyoxyalkylene units of the copolyester thus fixed to the fiber surface impart water wettability thereto and thus soil-release properties.
  • the French patent further discloses that, to provide adequate bonding according to its process, ratios of from 2:1 to 6:1 in gram mol units of ester units identical to those in the fiber surface to polyoxyalkylene units are needed; and that to impart adequate hydrophilic properties to the fiber, the bonded copolyester should provide from about 1 1O- to about 5x10 grams of polyoxyalkylene units per square centimeter of fiber surface.
  • the copolyesters so employed also should have a relative viscosity, measured using 1 percent by weight of the copolyester in orthochlorophenol at 25 C., of between about 1.1 to 1.5.
  • Another object of this invention is to provide a process for making the aforesaid articles by durably fixing said copolyester to said fiber articles in minute quantities by heating at relaxation temperatures, by wash removal of unfixed copolyester and by drying the fiber prior to me chanical processing.
  • step (b) wetting polyester fiber with a liquid dispersion, melt or solution of a substantially water insoluble copolyester containing from about 20 to 95 percent by weight of polyoxyalkylene units and from about to 5 percent by weight of crystallizable polyester units identical to the crystallizable polyester units present in the surface of the polyester fiber in effective amounts suitable for durable fixing as defined in step (b);
  • step (b) if employing undrawn polyester fiber, drawing the undrawn wetted fiber so as to dilute the copolyester on the fiber surface to effective concentrations of from about 2 l0 to 4 l0- grams of polyoxyalkylene units per square centimeter of the drawn surface; and, if employing drawn polyester fiber, by applying as in step (a) the aforesaid effective concentrations to the drawn fiber without further drawing;
  • polyester filaments so treated are surface modified by the present process to have wash-durable soil-release properties, and may be further processed to form other fiber articles of the invention by conventional means, such as by breaking or cutting filament to form staple; by carding, picking and drafting staple by itself or with non-polyester staple to form sliver and roving; and spinning to form yarn; and by weaving, knitting or other means to form fiber fabric articles of this invention, which also have the presently desired durable soil-release prop erties.
  • FIG. 1 is a flow chart schematically showing an embodiment of the instant process using undrawn fiber.
  • FIG. 2 is a process chart indicating, in greater particularity, process conditions for the embodiment shown in FIG. 1.
  • steps A and B may be performed in sequence, step C performed at a later time, and then steps D through G performed at a later time. Intermediate such sequences, the fiber may be stored as in packages.
  • Steps A and B Additional of copolyester Following melt spinning, undrawn polyester fiber so formed is in a substantially amorphous state. Treatment or addition of copolyester to the surfaces of the undrawn fiber at this point, according to the invention, can provide important economic and processing advantages over use of drawn fiber. Thus, although application of copolyester to drawn fiber can provide surface modified fiber articles of the invention as shown by the examples, the economic advantages of using undrawn fiber is believed to be so pronounced as to make this a preferred mode of practice.
  • applied copolyester has a better opportunity to interpenetrate the larger portions of amorphous surface of the undrawn fiber than it would the smaller amorphous portions of the more highly crystalline drawn fiber surface, thus to permit yet earlier and more intimate contact of copolyester molecules with fiber surface molecules and thus ultimately provide better fixing or bonding by cocrystallization and/or by formation of solid solutions or other mechanisms, all of which require such close intermolecular contact.
  • copolyester added to undrawn fiber beneficially acts as a drawing aid and substantially reduces the number of deep dye defects in fabrics produced therewith such as are caused by sticks and used filaments.
  • drawing undrawn copolyester coated fiber importantly serves other particular functions desirable for the purposes of this invention.
  • Drawing uniquely and uniformly dilutes the amount of copolyester present per unit surface area of the fiber. In so doing, we believe that copolyester molecules are brought into yet more intimate contact with surface molecules of the fiber thus to permit easier, earlier and more durable fixing of the copolyester to the fiber surfaces. Dilution by drawing also permits most economical use of the copolyester employed by permitting one initially to uniformly coat undrawn fiber with greater concentrations of copolyester than when coating drawn fiber while still using just enough copolyester to insure uniform coating.
  • This amount is then diluted in a uniquely uniform manner through uniformly increasing the fiber surface area and concomitantly uniformly stretching the coating film thereon to a point where the final concentration of copolyester on the surface is less than that which will be inadequately fixed, i.e. less than about 0.5 X 10* g./cm. of polyoxyalkylene units, thus helping to avoid removal of surplus unfixed copolyester during subsequent mechanical processing and the consequent stickiness problems, while still providing just enough copolyester to insure the desired durable bonding and the desired durable soil-release properties.
  • draw ratios of 2/1 to 10/1 of drawn fiber length to undrawn fiber length may be employed, according to the invention. Either cold or hot drawing may be used, a preferred range for the latter being from about 50 to 260 C. as shown in FIG. 2, and a most preferred range being about to 110 C.
  • a convenient means for applying the copolyester is to pass fiber through a liquid bath containing the copolyester, either in solution with an innocuous solvent therefor, which liquid also is a very poor solvent for the fiber, or in uniform dispersion in some innocuous liquid which is a very poor solvent for both the copolyester and the fiber, such as water, or a melt of the copolyester.
  • aqueous dispersions are preferred. When a dispersion is used, preferred practice dictates that the copolyester particles be quite small in size for easy and long-lived uniform dispersion to give a more uniform coating on the fiber, and to make great amounts of particle surface area per unit weight of copolyester available for fixing.
  • copolyester particle sizes of one or less micron in long length are adequate for this purpose.
  • Suitable concentrations of copolyester when used in solution or dispersion, may range from about 0.1 to 50 percent by weight with the preferred range being from about 1 to 20 percent by weight as shown in FIG. 2.
  • fiber wet pick-up that is to say the weight of copolyester solution, dispersion or melt added to the fiber
  • the most preferred range for many embodiments is about 10 to 20 percent by weight wet pick-up.
  • Other means also may be used to wet the fiber with copolyester, such as padding, spraying, or melt flowing the copolyester thereon. Bath application is preferred to insure uniform coating.
  • the amounts of applied copolyester which are useful to practice the present invention are those which will provide from about 2 10 to 4X10 grams of polyoxyalkylene units per square centimeter of drawn fiber surface. Less than about 2X10 g./cm. does not seem to afford adequate soil release properties, whereas greater than about 4X10 g./ cm. provides excessive copolyester which is not adequately fixed in heat treatment nor removed by washing and thus provides stickiness problems in mechanical processmg.
  • polyoxyalkylene units that are useful herein have the structure of the corresponding polyoxyalkylene glycols used in preparation of the coating copolyesters, defined hereafter, minus a terminal H and a terminal OH,
  • suitable hydrophilic polyoxyalkylene units are those derived from corresponding polyoxyalkylene glycols, such as the glycols of polyoxyethylene, polyoxypropylene, polyoxytrimethylene, polyoxybutylene and their copolymers.
  • polyoxyalkylene unit weights that are useful herein may range from about 282 to just less than that of the molecular weight of the polyester molecules in the fiber to be treated, with a preferred range of polyoxyalkylene unit molecular weights being from about600 to 15,000 and a most preferred range being from about 2,000 to 6,000.
  • Step C Heat fixing Heating drawn polyester fiber is conventional to relax the drawing strains set up therein.
  • heating the copolyester coated drawn fiber to relaxation temperatures importantly further serves to durably fix the copolyester to the fiber surface. Heating tends to permit the chemically identical polyester units of the copolyester and the fiber to align themselves with regard to one another, and thus to more closely pack upon subsequent cooling. 'It also permits the polyoxyalkylene units to make better contact with the amorphous portions of the fiber surface to more intimately mix or, we believe, better form a solid solution upon subsequent cooling.
  • fixing temperatures in the range of from about 150 C. to a temperature just below that required to melt the copolyester and fiber crystallites.
  • An exemplary fixing temperature range is from about 200 to 240 C. with heating times ranging from about 0.01 to 360 seconds or above when using a predominantly polyethylene terephthalate fiber coated according to the invention with a polyoxyethylene terephthalate/ polyethylene terephthalate copolyester, the copolyester being formed from a polyoxyethylene glycol having a molecular weight of about 3,000 and the fiber being drawn to a ratio of about 1.
  • Step D.Washing Critical to present invention is washing the fiber at this point in the process. Washing acts to substantially remove copolyester which was not adequately fixed at step C, and in so doing removes useless unfixed copolyester which otherwise would rub off on processing machinery to produce the troublesome stickiness and breakage problems hereinbefore discussed.
  • Unfixed copolyester molecules may be those with too low a degree of polymerization or formed with too low a mol percent of chemically identical polyester units to that in the fiber to permit adequate fixing by the heat treatment at step C and also those formed with too high a weight percent of hydrophilic units, which latter condition permits the wash liquid to unfix, detach or lift these molecules from the fiber surface despite some previous bonding during heating at step C. According to the present invention, these molecules must now be removed prior to machine processing to avoid stickiness and breakage problems; this is done by washing the fiber substantially free of such molecules.
  • washing is effected with some liquid, usually polar, which is (l) non-reactive with, i.e. innocuous to, the copolyester and the fiber, (2) in which the parent polyoxyalkylene glycol used to prepare the copolyester is substantially soluble; (3) in which the fiber and copolyester are substantially insoluble under the washing conditions employed; and (4) which should be removable upon drying, say, by volatilization upon reheating the fiber as in step G below.
  • liquids which tend to swell the fiber to any substantial extent are to be avoided.
  • suitable liquids are water and aqueous solutions or dispersions.
  • washing may be conducted at ambient room temperatures, for reasons of processing economy it is usually preferable to raise the temperature of the wash liquid to increase the rate of removal of unfixed copolyester.
  • An exemplary temperature range for such heated wash liquids, and more especially for water and aqueous solutions or dispersions, is from about 60 to C.; and generally such preferred temperatures may fall between about 40 C. and a temperature somewhat below the normal boiling point of the wash liquid or the maximum relaxation temperature of the fiber, whichever is lower.
  • Washing may be conducted by passing the fibers as in a tow through a liquid wash bath, as shown in FIG. 1, or by soaking in such a bath, or by spraying wash liquid onto the fibers or by any other convenient method. However done, washing should be conducted in such manner, by judicious selection of the wash liquid, its quantities, sufiicient wash time and the like, that unfixed excess copolyester is substantially removed from the fiber thereby.
  • Steps E and F Optional friction additive
  • certain of the surface modified polyester fibers produced by this invention may have too low a degree of fiber t0 fiber cohesion or interfiber friction.
  • such finish may be added at this point in the instant process, at step E, for example, by passing the washed fiber through a friction finish bath, as shown in FIG. 1, and removing excess liquid as through a pair of nip rolls, or by any other convenient means for finish addition and excess liquid removal.
  • Typical of the friction additives which may be employed are the aqueous dispersions of insoluble inorganic particulate materials, such as alumina, as shown in FIG. 2.
  • the friction aids should be added, at any event, only in such quantities and be of such a nature which will not be deleterious to either the fiber or the copolyester surfacemodifying coating, nor prevent the copolyester coating from effecting soil release nor adversely affect subsequent fiber processing.
  • the washed fiber usually should be nipped free of excess liquids, at step F, either after washing if no friction additive is used, or after addition of the friction aid, to facilitate fiber drying at step G.
  • Step G Drying and refixing loosened copolyester Following washing at step D, or addition of a friction aid at step E, the wet fiber is dried, according to the process of this invention, to serve several ends, the most important of which is to dry the fiber and to refix or more permanently bond copolyester molecules to the fiber surface which molecules may have loosened or have been partially debonded therefrom by the wash, and/ or friction additive treatment.
  • the loosened copolyester molecules when substantial in number, would be removed from fiber surfaces during subsequent mechanical processing to cause the aforesaid stickiness and breakage problems and/or undesirably reduce the durability of the soil-release properties of the filament article and fiber articles made therewith below what is obtainable through refixing.
  • the drying of the coated, fixed and washed fibers may be conducted at ambient temperatures, it is preferred practice to dry the fiber at elevated temperatures. These temperatures may range from somewhat below that used in step C for fixing up to a temperature just below that required to melt the copolyester and fiber crystallites. As shown in the examples, reheating to dry the fiber tends to improve soilrelease durability.
  • An additional advantage of reheating the fiber at this point is that the fiber is beneficially further relaxed and annealed for subsequent processing into fabric.
  • An exemplary reheating range, according to the present invention, employable with a polyethylene terephthalate fiber coated with a polyoxyalkylenepolyethylene terephthalate copolyester is from about 110 to 250 C., with a preferred range of about 120 to 200 C. A range of about 155 to 160 C. is most preferred when the polyoxyalkylene content of the copolyester employed is about 60 percent by weight.
  • useful fiber-forming crystallizable polyesters for the practice of the present invention are those with no, or a very low degree of, branching groups such as are defined in French Patent 1,401,581. These polyesters form substantially amorphous fibers upon melt spinning and crystallize to a substantial degree upon drawing.
  • any fiber-forming crystallizable polyester polymer may be used in fiber form, exemplary of which are polyethylene terephthalate, polytetramethylene terephthalate, poly(1,4 bismethylene cyclohexane terephthalate) poly(ethylenenaphthalene-2,4- dicarboxylate) and poly(ethylene-phenoxyethane-4,4'-dicarboxylate), and other such phenoxyalkane polymers as disclosed in US. Pat.
  • the aforesaid polyesters may be used wherein adipate, sebacate, isophthalate, sulfoisophthalate, p-oxybenzoate or p-oxyethoxy-benzoate groups may, Wholly or in part, replace the terephthalate or other carboxylate groups or wherein oxydiethylene or polyoxyethylene groups may, in part, replace the alkylene groups in the aforesaid polyesters.
  • Copolymers of the aforesaid polyesters with one another also may be used.
  • Preferred among the fiber-forming polyesters for instant practice are polyethylene terephthalate, its copolymers with the aforesaid polyesters wherein the polyethylene terephthalate portions represent at least 50 percent by weight of the copolymer and poly(1,4-bismethy1ene cyclohexane terephthalate).
  • the copolyesters used to coat the aforesaid polyester fibers contain crystallizable polyester units in percentages of from about 5 to 80 by weight, which units chemically are defined by the crystallizable ester repeating units present in the fiberforming polyester.
  • the remainder of the instant copolyesters contain from about 95 to 20 percent by weight polyoxyalkylene units as hereinbefore defined.
  • Useful copolyesters may be prepared by esterification or transesterification of appropriate polyoxyalkylene glycols,
  • EXAMPLE 1 Preparation of the copolyesters and their use-In the typical preparation of the preferred copolyesters useful in coating a predominantly polyethylene terephthalate fiber, ethylene glycol, polyoxyethylene glycol, dimethyl terephthalate and appropriate transesterification and condensation catalysts are brought to melt temperatures, desirably under a blanket of nitrogen or other inert gas, and heated, desirably with stirring, until a stoichiometric amount of the methanol byproduct is removed, say, under vacuum or by distillation, and the polymerization (DP) has advanced to where the relative viscosity of the copolyester, measured at 25 C. as a 1 percent solution in orthochlorophenol, is above 1.0.
  • Reactant charges and reaction conditions are given in Table 1 which follows.
  • the copolyesters so provided are meltable, water insoluble and water dispersible white waxy solids.
  • the aforesaid solid products are comminuted to particle sizes of 1 'or less micron and dispersed in water or some innocuous inorganic or polar organic liquid such as in a blender, at about 25 to C., to provide dispersions having a copolyester solids content between about 0.15 and 15 percent.
  • These dispersions are applied to melt spun polyethylene terephthalate filamentous tow by running the tow through a bath of such dispersions so as to provide a wet pick-up by the fibers of between 5 and 100 percent of the fiber.
  • the fibers prior or subsequent to copolyester application are drawn at drawing temperatures of from 50 to 260 C. in intervals of from 1 to 0.05 second per meter of fiber at draw ratios of 2:1 to 10:1, whereby the copolyesters applied prior to drawing are initially fixed to the fibers surfaces.
  • the coated drawn fibers are heat fixed at temperatures of from 150 to 240 C. Subsequent washing frees the fibers of unfixed copolyesters and drying the fibers at 25 to 240 C. produces soil-release articles of this invention.
  • the fiber articles and the woven, knitted and bonded fabrics of the invention processed therefrom have unusually durable soilrelease and anti-redeposition properties, providing for easy release of motor oil, grease, food, clay, and grass stains, even after previous washings.
  • EXAMPLE 2 e.g. having a molecular weight from about 300 to 15,000, with appropriate dicarboxylic acids and/ or their diesters, such as terephthalic acid or dimethylterephthalate, and with appropriate glycols having chemical units identical to the repeating units in the fiber, such as polyethylene glycol or ethylene glycol, and then by condensation copolymerization of the alcoholic and/or ester reaction Using the method of Example 1, 6.6 parts by weight of ethylene glycol, 65 to 67 parts by weight of polyoxyethylene glycol of 3000 molecular weight and dimethyl terephthalate in quantities equivalent to 24 to 25 parts by weight of terephthalic acid are transesterified and condensed.
  • the milky white solid copolyester obtained contains about 9 percent polyethylene terephthalate units and is water insoluble and easily comminuted in water to form a dispersion of 1.4 percent solids content of particles of 1 or less micron in size, using a blender.
  • a tow of 11 d.p.f. undrawn polyethylene terephthalate filaments is run through a bath of the aforesaid dispersion at a rate of about 62 meters/minute to wet coat the filaments.
  • the wet coated filaments are nipped free of superfluous liquid providing a wet pickup of about 20 percent and a copolyester concentration of about 2.86 10- grams of polyoxyalkylene units per square centimeter of filament surface.
  • the tow of wetted filaments is then drawn to a denier of about 2.2 d.p.f., or about 500 percent, at a draw temperature of about 100 C.
  • This drawing step provides for dilution of copolyester on the filaments to a concentration of about 1.3 l grams of polyoxyalkylene units per cm. of filament surface.
  • the drawn coated filaments are heat treated at 200 C. for about 1 second to fix the copolyester to the fiber surfaces and to relax strains set up in drawing.
  • the fixed fibrous tow is passed through a water wash bath containing a small quantity of colloidally dispersed aluminum trioxide as a friction aid, and in so doing is washed substantially free of unfixed copolyester.
  • the washed tow is dried at about 166 C. for about 6 seconds, and then cut to form 1 /2 inch staple fibers.
  • the staple is carded, picked and drafted to form lap rolls and sliver.
  • the polyester sliver is combined with cotton staple sliver, drafted to blended sliver, formed into roving and spun to form 50 percent polyester/50 percent cotton blended yarn, which is woven to fabric greige goods.
  • Swatches of the greige goods are stained with a mixture of blandyblack clay and 30 SAE motor oil and then hand washed with an aqueous solution of the commercial detergent Tide, which is an aryl benzene sulfonate and is marketed by Procter and Gamble Co.
  • the 10 griege goods are freed of all stain. Otherwise similar greige goods, but prepared with polyester fiber not treated by the instant process show no stain removal upon washing.
  • Treated greige goods washed some and more times with wash cycles, as explained in Table II, show good soil-release after subsequent staining and rewashing.
  • a filamentous polyethylene terephthalate undrawn tow is treated with copolyester, drawn, heat fixed and dried, omitting the wash step of the instant process.
  • the machinery shows substantial accumulation of copolyester in the form of sticky spots at points where the fiber rubs against metal surfaces, and the lap rolls formed therewith show excessive splitting to the extent of being unprocessable.
  • Examples 3 and 4, and 7 and 8 demonstrate the critical nature of Washing in the instant process with regard to further processing of fiber to fabric.
  • Examples 5 and 6, and 12 and 13 demonstrate that one may obtain effective soil-release durability when using copolyester dispersions over the range of 0.14 to 14 percent solids and one may process the treated fiber so obtained to fabric with or without a friction aid. With regard to the latter, processing is slower than when a friction aid is used.
  • Examples 7 to 9 demonstrate the utility of employing drawn tow prior to copolyester treatment in the present process, and the necessary use of a wash step following heat fixing.
  • Examples 10 and 11 demonstrate the desirability of reheating the washed treated fiber on drying to enhance soil-release durability to a remarkable degree over that obtained by ambient drying.
  • the denier of the drawn tow is about 2.2. Nevertheless, according to the invention, tow may be used which after drawing is from about 1 to 20 d.p.f.
  • Friction aid bath
  • copolyester which after drawing is coated with copolyester to provide from about 2 10 to 4 l0- grams of polyoxyalkylene units per square centimeter of fiber surface area.
  • the coating concentration to be provided in a particular embodiment is largely dictated by the denier of the fiber to be treated and its chemical composition, the type, weight percent and unit molecular weight of the polyoxyalkylene units used in the copolyester employed, and the end use intended for the treated fiber.
  • EXAMPLE 14 Using otherwise identical conditions and materials as described in Example 3, a filamentous tow of a copolymer of 90 percent of polyethylene terephthalate and percent of polyethylene isophthalate is treated and processed satisfactorily to fabric. Durability tests show excellent soilrelease properties after 80 washings.
  • EXAMPLE 15 Using otherwise identical conditions and materials as described in Example 3, a filamentous tow of a 30/70 blend of cis/trans poly(l,4-bismethylene cyclohexane terephthalate) is treated with a 1.4 percent dispersion in water of a copolyester containing 50 percent of 1,4-bismethylene cyclohexane terephthalate and 50 percent of polyoxyethylene terephthalate having a unit weight of 4,000.
  • the treated tow processes to greige goods without processing difiiculties.
  • the soil release durability tests show good soil release even after 80 wash cycles, with excellent soil anti-redeposition.
  • EXAMPLE 16 A 1.4 percent aqueous copolyester dispersion is formed with copolyester 1B of Example 1 wherein about 95 percent of the particles have sizes in excess of 1 micron in long length, i.e. the longest length of the particle. This dispersion is used according to the conditions and with the materials of Example 3. The treated fiber is processed to fabric with no difliculty; however, the fabric shows soil-release durability of only 2 wash cycles.
  • EXAMPLE 17 Two swatches of greige goods are prepared from 50/50 cotton/polyethylene terephthalate blend yarns, one using the coated polyester fiber prepared according to the process of this invention as described in Example 2 above and the other using the materials of Example 2 but employing the process as described in Example 13 of French Pat. 1,401,581 (treatment of a blend fabric with an aqueous copolyester dispersion to deposit 3 percent by weight of solids onto the fabric which is then heated in a stretching frame to 180 C. for 30 seconds). The two swatches are dyed with a conventional disperse dye used in the dyeing of such blend fabrics.
  • the swatch prepared as in Example 2 above dyes well and evenly, and after a number of successive washings, such as 10 washings, remains even in coloration and intensity; the swatch prepared according to the teaching of French Pat. 1,401,581 is of uneven and diminished coloration after 10 washings.
  • a process for treating polyester fiber to impart soilrelease properties thereto prior to mechanical processing into textile articles comprising the steps of:
  • polyester fiber treated is undrawn fiber and wherein said fiber is drawn at a ratio of about 2 to 10 times its original length prior to heat bonding the copolyester to said fiber surface.
  • polyester fiber comprises polyethylene terephthalate.
  • polyester fiber comprises poly(1,4-bismethylene cyclohexane terephthalate) 6.
  • a process for treating polyester fiber to impart soilrelease properties thereto prior to mechanical processing 1nto textile articles comprising the steps of:
  • polyester fiber treated is undrawn fiber and wherein said fiber 1s drawn at a ratio of about 2 to 10 times its original length prior to heat bonding the copolyester to said fiber surface.
  • polyester fiber comprises polyethylene terephthalate.
  • polyester fiber comprises poly(1,4-bismethylene cyclohexane terephthalate).

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  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3998921A (en) * 1971-07-10 1976-12-21 Bayer Aktiengesellschaft Process for production of polyester threads
US4054634A (en) * 1975-09-29 1977-10-18 Allied Chemical Corporation Production of polyester tire yarn
US4537596A (en) * 1983-09-26 1985-08-27 Bayer Aktiengesellschaft Polyetheresters, their preparation, and their use for treating textiles

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BE787375A (fr) * 1971-08-09 1973-02-09 Du Pont Procede pour lier un fil a filaments multiples par revetement d'un copolyester elastomere

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Publication number Priority date Publication date Assignee Title
GB1175207A (en) * 1963-06-05 1969-12-23 Ici Ltd Modifying Treatment of Shaped Articles derived from Polyesters
GB1088984A (en) * 1963-06-05 1967-10-25 Ici Ltd Modifying treatment of shaped articles derived from polyesters
GB1118875A (en) * 1964-07-22 1968-07-03 Ici Ltd Improvements in the treatment of synthetic polyester textile articles with dyes, pigments and optical brightening agents

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3998921A (en) * 1971-07-10 1976-12-21 Bayer Aktiengesellschaft Process for production of polyester threads
US4054634A (en) * 1975-09-29 1977-10-18 Allied Chemical Corporation Production of polyester tire yarn
US4108781A (en) * 1975-09-29 1978-08-22 Allied Chemical Corporation Production of polyester tire yarn
US4537596A (en) * 1983-09-26 1985-08-27 Bayer Aktiengesellschaft Polyetheresters, their preparation, and their use for treating textiles

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BR6912305D0 (pt) 1973-04-10
FR2017840A1 (enrdf_load_stackoverflow) 1970-05-22
BE738706A (enrdf_load_stackoverflow) 1970-03-11
FR2017840B1 (enrdf_load_stackoverflow) 1974-07-12
GB1252670A (enrdf_load_stackoverflow) 1971-11-10

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