US3287787A - Method of selectively weakening crimped polyester filaments and fibers - Google Patents

Method of selectively weakening crimped polyester filaments and fibers Download PDF

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US3287787A
US3287787A US141791A US14179161A US3287787A US 3287787 A US3287787 A US 3287787A US 141791 A US141791 A US 141791A US 14179161 A US14179161 A US 14179161A US 3287787 A US3287787 A US 3287787A
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filaments
fibres
crimped
treatment
crimp
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Goulding Geoffrey Leonard
Barr Keith Philip
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Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
    • D06M11/59—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with ammonia; with complexes of organic amines with inorganic substances
    • D06M11/60—Ammonia as a gas or in solution
    • 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
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
    • D06M13/325—Amines
    • D06M13/332—Di- or polyamines
    • 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
    • D06M15/53—Polyethers

Definitions

  • the propensity of forming such balls of fibres during wear is known as pilling and is believed to be associated with the migration of the fibres which are not firmly held in position in the yarn or fabric. Pilling is therefore encountered in low twist yarn and in loosely woven or knitted fabrics containing such yarns, when made from polyester fibres.
  • polyester fibres can be weakened at intervals by chemical means if they have been deformed by crimping so that they subsequently break under mechanical stress e.g. as encountered during wear of the fabric.
  • mechanical stress e.g. by brushing.
  • FIG. 1 shows the effect of concentration
  • FIG. 2 shows the effect of time
  • FIG. 3 shows the effect of temperature
  • FIG. 4 shows the effect of time when a quaternary ammonium salt is included in the bath.
  • FIGURE 5 is a diagrammatic plan view of a part of a polyethylene terephthalate filament being strained by bending, the view being useful in imparting an understanding of the point of selective pronounced attack of the chemical agent according to the present invention.
  • our invention provides improved crimped filaments and fibres characterised in that they have been weakened at intervals corresponding substantially to the apexes of their crimp when the crimp is caused by a permanent deformation involving compression beyond 1 to 2% of the elastic limit on the inner curvature of the bent filament or fibre.
  • the ice fibres Preferably have 5 to 18 crimps per inch. It is also preferred that the fibres should be reduced in strength by at least one third at the apexes of their crimp, compared with the stronger fibre portions between said weaker portions.
  • crimped synthetic polyester filaments or fibres are treated with a chemical agent under conditions such that the filaments or fibres are weakened at intervals corresponding to the apexes of their crimp.
  • the process is preferably applied to filaments in the form of a crimped, drawn tow before the filaments have been subjected to a heat setting process for setting the imparted crimp and before cutting or breaking into staple fibre.
  • alkaline solutions such as sodium hydroxide solution, ammonia, solutions of certain quaternary ammonium salts or methyl alcohol, which may be added to the sodium hydroxide solution, or certain diamines such as a solution of hexamethylene diamine, anhydrous glycols including high molecular weight glycols their esters and ethers, which are still liquid at room temperature. Inert diluents may be added to these solutions if desired.
  • Our invention also provides improved fabrics characterised in that they contain at least a proportion of crimped polyester fibres which are weaker at intervals corresponding substantially to the apexes of their crimps. Such fabrics have a reduced propensity to pilling even when they are made from yarns or using fabric constructions, which when made from or applied to yarns of unweakened fibres, show a marked propensity to pilling.
  • a treatment of uncrimped filaments or crimped but heat set filaments under the same conditions does not lead to the same weakening at spaced intervals along the lengths of the filaments or fibres, because the chemical agents attack more uniformly.
  • the weakening or breaking of the filaments or fibres by our treatment is a direct consequence of the selective intensity of the attack caused by the agents at intervals along the filaments or fibres at the apexes of the crimps, whereas the portions between the apexes are affected to a lesser degree or may remain substantially unaffected by the uniform application of the chemical agent.
  • the portions of the filaments or fibres treated with a suitable agent break under mechanical stress preferentially at intervals, whereas the portions between may remain substantially unaffected in strength.
  • the conditions of treatment have to be determined by experiment and should be selected so that no intolerable weakening of the filaments or fibres should occur in the uncrimped portion, whereas the apexes of the crimps are weakened by at least one third or preferably by about one half or more, compared with their original strength. This can be done by measuring the tenacity of a small sample of the filaments or fibres before and after the treatment and by examining the broken ends of the fibres which should occur only at the apexes of their crimp.
  • the strains introduced during crimping should preferably be such as to cause bending of the filaments at defined intervals and which results in a permanent deformation involving compression beyond l%2% of the elastic limit on the inner curvature of the bent filament and a tension on the outer curvature of the bent filament to cause adeformation not beyond 5% of the elastic limit, only at intervals along the filament axis.
  • the deformation should preferably involve bending the filaments at intervals to a curvature which is less than 50 times the filament diameter, e.g. a 4 denier filament should be bent to a radius of curvature of less than 2 times cm.
  • Conditions of crimping should preferably be arranged so that the intervals between crimps result in 5-18 crimps per inch. If the crimp frequency is below 5, the crimped fibres which migrate to the surface of the fabric may cause the fibres to be broken off at intervals which are too large to prevent the formation of pills. In other wonds the projecting broken fibre ends will be too long to prevent the formation of pills. If on the other hand the crimp frequency is allowed to rise above 18 crimps per inch, the useful lengths of fibre between the apexes of the crimps may be too short and fabrics made from such fibres are likely to have a reduced resistance to abrasion and Wear and therefore will deter from their commercial value.
  • FIG. 5 showing a diagrammatic plan view of a part of a polyethylene terephthalate filament being strained by bending.
  • a filament of diameter d is being strained by bending to a radius r such that a small part of the filament AB, which part is of the order of the filament diameter d, subtends an angle at the centre of curvature.
  • compression beyond 1%2% will cause a permanent deformation and disorientation of the fibre forming polymer. This is believed to permit the selective pronounced attack of the chemical agent compared with the remaining portions of the fibre, because of a rednction in the order of the filament structure in the bent portion.
  • the desired crimp may be obtained using a stufi'er box crimper having relatively large diameter feed rolls and by adjusting the pressure in the stulfer box from which the exit of the crirnped filaments is restrained by means of a dead Weight or by hydraulic pressure.
  • feed rolls of 46 diameter about 1" wide suitable for the crimping of tows of 100,000-300,000 denier, in a stuffer box crimper.
  • a uniform application of the chemical agent is necessary in order to obtain the selective weakening of the filaments according to our invention.
  • Strong aqueous caustic alkali solution of 20- by weight may be used at low temperatures, for example at 20-40 C., for a treatment lasting 30-50 hours.
  • catalytic accelerators to the caustic alkali solution selected from methyl alcohol and certain quaternary ammonium salts, speed up the reaction.
  • Suitable quaternary'ammonium salts comprise e.g., cetyl trimethyl ammonium bromide and lauryl dimethyl benzyl ammonium chloride.
  • the treatment should be carried out at a temperature below heat setting temperature to obtain effective treatment. It will be appreciated that the time of treatment can be shortened as higher temperatures are used, but since the selective degradation of the crimped filaments decreases with increasing temperature, temperatures below 110 C., preferably room temperature up to about C. are preferred.
  • the tenacity should be reduced preferably below 3 and about 1.5 g.p.d.
  • the overall fibre tenacity In the case of medium tenacity fibres below 4 gms. per denier it is desirable to reduce the overall fibre tenacity to 2.5 gms./denier or below but above 1.0 gm. per denier. It will be appreciated that a certain amount of reduction in the tenacity even in the stronger fibre portions, between the crimps, i tolerable but this should preferably not exceed of the initial tenacity. In the case of the treatment with caustic alkali a loss in weight of up to 10% with a corresponding reduction in the diameter of the filaments may be brough about and this is associated with an improved handle of the fabric.
  • our invention will more particularly be described relating to polyester filaments and fibres made from polyethylene terephthalate for which it is particularly suitable, the filaments having a substantially circular cross section. It will be appreciated, however, that our invention is not intended to be so limited and that it applies also to filaments and fibres having a non-circular cross section, particularly a cruciform, Yshaped, tri-lobal, dogbone, or any other known cross section for thermoplastic filaments. Similarly it will be applicable to other polyester or copolyester filaments as stated earlier and which show a propensity to pilling.
  • polyethylene terephthalate filaments are produced by a process of melt spinning followed by drawing at a temperature below 110 C. preferably between and 98 C.
  • the drawn filaments in the form of tows are then subjected to a stutter box crimping operation ensuring a deformation in the filaments to cause bending at intervals to a curvature which is less than 5 0 times their filament diameter in order to impart the desired crimp, at a frequency of between 5 to 18 crimps per inch, depending upon the filament diameter which may be between 1 to 5 denier per filament.
  • the crimped tows are then subject to the treatment with the defined chemical agents which are removed by e. g., neutralising with dilute strong acid solution, rinsing with water, followed 'by drying and heat setting'at a temperature above C., preferably using steam at superatmosphen'c pressure. and temperatures between -l50 C., and temperatures up to 220 C. using dry heat. Setting is necessary to bring residual shrinkage in boiling water for 1 minute, to less than 1%.
  • the defined chemical agents which are removed by e. g., neutralising with dilute strong acid solution, rinsing with water, followed 'by drying and heat setting'at a temperature above C., preferably using steam at superatmosphen'c pressure. and temperatures between -l50 C., and temperatures up to 220 C. using dry heat. Setting is necessary to bring residual shrinkage in boiling water for 1 minute, to less than 1%.
  • Suitable finishing lubricants may be applied before or after heat setting in order to facilitate processing and to prevent the accumulation of static electricity.
  • the crimped, treated and heat set tows are then cut into staple fibres of the desired length, e.g., between 1 /2" and 7".
  • the drawn crimped fibres have a tenacity of 4 gm. per denier and up to 6 gm. per denier, before the treatment with the chemical agent.
  • polyester filaments and fibres referred to in this specification are made by a process of melt spinning and denote fibre forming polyesters including polyethylene terephthalate, copolyesters derived from up to 15% of another component which may be selected from the group of dicarboxycylic acids having the formula:
  • R may be methylene, polymethylene or arylene, other than paraphenylene, represented by a sebacic, adipic and isophthalic acid, and the remainder polyethylene terepht-halate; or modified fibre forming polyesters such as po1y(hexahydropar-axylylene)terephthalate.
  • the filaments may be subjected to a deformation step which is effective, followed by the treatment with a suitable agent and if desired followed by further steps such as heat setting before or after further deformation steps to bring about a greater crimp frequency.
  • the filaments Example 11 between 2% and 6 inches.
  • the polyester filaments may be subjected to immersion or spraying with hot substantially anhydrous polyethylene glycols and nonyl phenyl polyethylene glycol ethers, of a molecular weight of 200-2000, using temperatures above 80 C. but at least 30 C. below the melting temperature of the polyester, preferred temperatures are 110-130 C.
  • the polyglycols may be applied before or after drawing of the polyester filaments and this brings about a considerable improvement in dye uptake.
  • polyglyc-ols is described in our copending US. application Serial No. 114,021.
  • Example I A 275,000 denier tow containing 70,000 filaments of polyethylene terephthalate is crimped in a stuffer box crimper so that the tow has 10-14 crirnps per inch.
  • the crimped but unset tow is treated by immersion in a 22.5% sodium hydroxide solution in Water at 30 C. for 40 hours. Excess solution is removed between squeeze rolls and the tow is washed with water, dried and heat set with steam at 130 C., and cut into staple fibres of any desired length.
  • the single fibre tenacity of crimped tow which is heat set using steam at 140 C. for half an hour, before the treatment with the sodium hydroxide solution in Example I, is reduced by only 32%.
  • Example III to VI experiments are described to illustrate the effect of setting on a simulated crimp in polyethylene terephthalate yarn under various treating conditions with caustic soda solutions, with and without an accelerator, and the testing method used for determining the breaking load and extension of the yarn.
  • Yarn Polyethylene terephthalate Terylene 75 denier 36 filament yarn having a tenacity of 4.5-5.5 g.p.d. and an extension at break of 27-17%.
  • Crimping The yarn was wrapped around a 2 centimeter wide strip of copper foil 0.25 mm. thick, placed between polished steel plates and subjected to a pressure of 15 tons per square inch for five minutes in a hydraulic press, to obtain a simulated crimped yarn, in which each filament is deformed by compression beyond the elastic limit on the inner curvature of the bent filaments, when the elastic limit is between 1-2%.
  • the yarn was subjected to dry heat setting by a treatment in an electric oven at 140 C. for ten minutes.
  • Other samples of the same yam were subjected to steam setting in a Sanderson oven at a steam pressure of 40 lbs. per square inch, equivalent to a temperature of 140 C., for fifteen minutes.
  • Example III Effect of setting the crimps.
  • the results are shown in Table 1 in which the treatment time used was 30 hours using a 20% w./v. sodium hydroxide solution at room temperature. Unset, dried heat set, and steam set yarns both crimped and uncrimped were tested for breaking load and extension at break both before and after the treatment with caustic soda. It will be seen from the table that the effect obtained produces considerable differences in tensile strength between the crimped and uncrimped portion of the filame-nts and that this effect is achieved with the unset fibre where, after treatment, the crimped fibre was 48% weaker than the uncrimped fibre. The set fibres do not show this significant strength difference.
  • Dry heat set fibre differs by approximately 6% between crimped and uncrimped samples, both before and after treatment. Crimped steam set fibres was twice as weak compared with an uncrimped sample, after treatment as before the difference was still only 21%.
  • Example IV strength between crimped and uncrimped yarn decreased Effect of concentration.Unset crimped yarn and uncrimped controls as described, were used to investigate rapidly with increasing temperature. This could be due to the setting efiect of the hot liquid.
  • Vantoc CL Vantoc CL
  • Example V added.
  • the results of the treatment during one to seven Investigation of the eifect of the temperature is shown in Table 4 and FIGURE 3.
  • the time of treatment was varied in order to give a constant value for the strength of the uncrimped fibres and the results showed that at 9 hours on uncrimped and crimped filaments is shown and the difference in tensile properties and the percentage difference between uncrirnped and crimped samples are tabulated in Table 5 (and FIGURE 4). It can be seen that after only six hours the crimped yarn was too weak for treatment temperatures of over C. the difference in the tensile strength to be measured.
  • Example VII This example illustrates the effect of the treatment on pilling.
  • a stuffer box crimped unset drawn polyethylene terephthalate tow was treated for thirty hours in 20% aqueous sodium hydroxide solution at room temperature, washed with water, dried, set in air at 140 C. for 10 minutes, out into 2 inch lengths and resulting staple fibres were converted on standard cotton equipment to give spun cotton type polyester yarn and this was woven into a twill fabric which was tested for pilling.
  • Table 6 shows the properties of the fibre at various stages of fabric production, compared with untreated polyester cotton-type 2" long staple fibres. It will be seen that improved pilling performance is achieved at the expense of decreased flex abrasion resistance and tensile strength. The lower extension at break of the treated fibre is of not set, so that the filaments and fibres are weakened at intervals corresponding to the apexes of their crimp.
  • Example VII The Brush and Sponge test referred to in Example VII is described in A.S.T.M. 1958 D. 1375-55T, page 515. This test is intended to determine the resistance of Woven fabrics to pilling and fuzzing.
  • the method provides a laboratory procedure for mechanically simulating wear conditions by first brushing a fabric to form free fibre ends and then subjecting the fabric to a circular rubbing action with a sponge which rolls the fibre ends into pills.
  • Unset crimped fibre is preferentially attacked at the crimp apexes by strong aqueous caustic soda solution.
  • Fabric made from treated fibre shows an improvement in pilling performance compared with untreated fibres.
  • d is the filament diameter
  • r is the radius of bending
  • s is the angle subtended by an element of the filament at the centre of curvature.
  • a quaternary ammonium salt selected from cetyl trimethyl ammonium bromide and lauryl dimethyl benzyl ammonium chloride.

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  • Mechanical Engineering (AREA)
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  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5114620B1 (de) * 1970-12-26 1976-05-11
US4270913A (en) * 1979-07-06 1981-06-02 Celanese Corporation Pill-resistant polyester fabrics
US4583266A (en) * 1981-10-05 1986-04-22 Asahi Kasei Kogyo Kabushiki Kaisha Process for preparation of discontinuous filament bundles and sharp-ended filaments
US4842792A (en) * 1988-02-16 1989-06-27 Eastman Kodak Company Drafting process for preparing a modified polyester fiber
US4996107A (en) * 1988-02-16 1991-02-26 Eastman Kodak Company Ink reservoir containing modified polyester fibers
US5124205A (en) * 1988-02-16 1992-06-23 Eastman Kodak Company Ink reservoir containing modified polyester fibers
US5591516A (en) * 1995-06-07 1997-01-07 Springs Industries, Inc. Durable, pill-resistant polyester fabric and method for the preparation thereof
CN105431470A (zh) * 2013-06-27 2016-03-23 瑞来斯实业公司 亲水性聚酯纤维
US10227725B2 (en) 2014-04-16 2019-03-12 Cummins Filtration Ip, Inc. Tuning surface properties of melt blown polyester fibers by hydrolysis and solution grafting
CN111418607A (zh) * 2020-03-30 2020-07-17 北京机科国创轻量化科学研究院有限公司 一种复合纳米银抗病毒剂及其制备方法和应用
CN115613154A (zh) * 2022-11-15 2023-01-17 浙江恒百华化纤有限公司 一种三维超亮光dty纤维及其生产工艺

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Publication number Priority date Publication date Assignee Title
IT1180947B (it) * 1984-11-23 1987-09-23 Montefibre Spa Procedimento per migliorare la mano e il drappeggio di prodotti tessili a base di poliestere
WO2002097187A1 (de) * 2001-05-25 2002-12-05 Carl Freudenberg Kg Verfahren zur reduzierung des pillings
CN103286801A (zh) * 2013-05-30 2013-09-11 广东联塑机器制造有限公司 一种型材、线槽无屑热切机

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US2781242A (en) * 1954-02-05 1957-02-12 Du Pont Process of improving the hand of polyethylene terephthalate fabric by heat shrinking and hydrolyzing the fabric
DE1024482B (de) * 1956-06-05 1958-02-20 Hoechst Ag Verfahren zur Verminderung des Pilling von Textilmaterial aus vollsynthetischen Fasern
US2828528A (en) * 1956-12-12 1958-04-01 Du Pont Finishing polyester fabrics
DE1033175B (de) * 1956-06-05 1958-07-03 Hoechst Ag Verfahren zur Verminderung des Pilling von Textilmaterial auf Basis von sechsgliedrige carbocyclische Ringe enthaltenden Polyestern
DE1034133B (de) * 1956-06-05 1958-07-17 Hoechst Ag Verfahren zur Verminderung des Pilling von Textilmaterial auf Basis von sechsgliedrige carbocyclische Ringe enthaltenden Polyestern
US2897042A (en) * 1955-06-30 1959-07-28 Du Pont Method for increasing pill resistance and density of blended staple polyethylene terephthalate and cellulosic fabrics by applying specific chemical shrinking agents for the polyethylene terephthalate
US2907094A (en) * 1952-08-09 1959-10-06 Deering Milliken Res Corp Textile process
GB840796A (en) * 1955-05-31 1960-07-13 Ici Ltd Treatment of polyethylene terephthalate filamentary textile material or textile fibres
US2999296A (en) * 1957-03-25 1961-09-12 Du Pont Novel filaments and fabrics
US3034196A (en) * 1960-03-18 1962-05-15 Du Pont Alternately crimped staple fiber

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CH221902A (de) * 1936-03-13 1942-06-30 Ubbelohde Leo Dr Prof Verfahren und Vorrichtung zur Gewinnung von gekräuselten Kunstspinnfasern.
AT184663B (de) * 1951-07-12 1956-02-10 Du Pont Verfahren zur Verbesserung der elastischen Eigenschaften von Fasern oder Fäden aus Polymeren der Terephthalsäureester
GB735027A (en) * 1952-03-28 1955-08-10 Ici Ltd Improvements in artificial yarns and fibres

Patent Citations (10)

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Publication number Priority date Publication date Assignee Title
US2907094A (en) * 1952-08-09 1959-10-06 Deering Milliken Res Corp Textile process
US2781242A (en) * 1954-02-05 1957-02-12 Du Pont Process of improving the hand of polyethylene terephthalate fabric by heat shrinking and hydrolyzing the fabric
GB840796A (en) * 1955-05-31 1960-07-13 Ici Ltd Treatment of polyethylene terephthalate filamentary textile material or textile fibres
US2897042A (en) * 1955-06-30 1959-07-28 Du Pont Method for increasing pill resistance and density of blended staple polyethylene terephthalate and cellulosic fabrics by applying specific chemical shrinking agents for the polyethylene terephthalate
DE1024482B (de) * 1956-06-05 1958-02-20 Hoechst Ag Verfahren zur Verminderung des Pilling von Textilmaterial aus vollsynthetischen Fasern
DE1033175B (de) * 1956-06-05 1958-07-03 Hoechst Ag Verfahren zur Verminderung des Pilling von Textilmaterial auf Basis von sechsgliedrige carbocyclische Ringe enthaltenden Polyestern
DE1034133B (de) * 1956-06-05 1958-07-17 Hoechst Ag Verfahren zur Verminderung des Pilling von Textilmaterial auf Basis von sechsgliedrige carbocyclische Ringe enthaltenden Polyestern
US2828528A (en) * 1956-12-12 1958-04-01 Du Pont Finishing polyester fabrics
US2999296A (en) * 1957-03-25 1961-09-12 Du Pont Novel filaments and fabrics
US3034196A (en) * 1960-03-18 1962-05-15 Du Pont Alternately crimped staple fiber

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5114620B1 (de) * 1970-12-26 1976-05-11
US4270913A (en) * 1979-07-06 1981-06-02 Celanese Corporation Pill-resistant polyester fabrics
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GB922406A (en) 1963-04-03
NL269740A (de)
DE1231391B (de) 1966-12-29

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