US3161706A - Method and apparatus for wet spinning elastomeric polymers into a fused multifilament fiber - Google Patents

Method and apparatus for wet spinning elastomeric polymers into a fused multifilament fiber Download PDF

Info

Publication number
US3161706A
US3161706A US141530A US14153061A US3161706A US 3161706 A US3161706 A US 3161706A US 141530 A US141530 A US 141530A US 14153061 A US14153061 A US 14153061A US 3161706 A US3161706 A US 3161706A
Authority
US
United States
Prior art keywords
filaments
fiber
multifilament fiber
coagulating bath
wet spinning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US141530A
Other languages
English (en)
Inventor
Jr Timothy V Peters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Polythane Corp
Original Assignee
Polythane Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL132223D priority Critical patent/NL132223C/xx
Priority to NL291293D priority patent/NL291293A/xx
Priority to BE633256D priority patent/BE633256A/xx
Application filed by Polythane Corp filed Critical Polythane Corp
Priority to US141530A priority patent/US3161706A/en
Priority to FR930830A priority patent/FR1361981A/fr
Application granted granted Critical
Publication of US3161706A publication Critical patent/US3161706A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/70—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyurethanes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section

Definitions

  • This invention relates to a method and apparatus for the wet spinning of filaments from solutions of elastomeric polymers commonly referred to as polyurethanes.
  • Wet spinning of elastomeric polymer solutions involves the extrusion of an elastomeric polymer solution through an orifice into a coagulating bath.
  • the filament is formed as the solvent difiuses out into the coagulating bath. This diffusion is generally accompanied by the penetration of the coagulating bath liquid into the filament.
  • the spinning of isocyanate modified dihydroxy elastomeric polymer solutions by the wet spinning process has not been particularly successful.
  • the filaments produced by this process have been weak and have not possessed desirable properties.
  • the isocyanate modified dihydroxy elastorneric polymer solutions have been transformed into filaments by a dry spinning process.
  • the dry spinning process is recognized as being quite expensive. It is also recognized that a wet spinning process, if it could be used to produce filaments having acceptable properties, would be much more desirable since it has numerous known advantages such as high productivity, low operating temperatures, large spinning orifices and so forth.
  • This invention involves a Wet spinning process for preparing isocyanate modified dihydroxy elastomer fibers possessing the same excellent properties as those fibers obtained from the more expensive dry spinning process.
  • the invention broadly involves the extrusion of an isocyanate modified dihydroxy elastomeric polymer solution through suitable spinnerets or extrusion nozzles into a liquid coagulating bath to form filaments.
  • a plurality of the filaments are then gathered together and passed through a restricted area so that the pressure applied to them will press them together and consolidate them into a fused multi-filament fiber.
  • the filaments While the filaments are being pressed together they are in contact with the coagulating fluid and are in a state of semi-plastic fiow.
  • the multifilament fiber is then subjected to a twisting action while it is in contact with the coagulating fluid and also in a state of semi-plastic flow.
  • the twisting action which is imparted to the multifilament fiber is in the nature of a socalled false twist.
  • This twisting action can be imparted to the multifilament fiber by causing it to roll over a smooth surface.
  • the resulting multifilamen't fiber is then dried and wound on a spindle ready for subsequent use in the formation of various garments or wearing apparel.
  • the solutions of isocyanate modified dihydroxy elastomeric polymers can be prepared by various manners known in the art.
  • the term elastomeric polymer has been used herein to describe solutions of isocyanate modi ficd dihydroxy compositions which are capable of being extruded into a coagulating bath to form filaments or other shaped objects.
  • the isocyanate modified compositions which can be extruded into a coagulating bath to form filaments have been referred to in the prior art in various manners such as prepolymers, semi-polymers and so forth.
  • the term elastomeric polymer as used herein is intended to include all such extrudable isocyanate modified compositions.
  • the elastomeric polymers used according to this invention are prepared by reacting a difuncice tional hydroxyl terminated polymer with a molar excess of an organic diisocyanate to produce a low molecular weight isocyanate terminated prepolymer.
  • the prepolymer can then be reacted with a compound containing, in general, at least two active hydrogens in the presence of a solvent to form a solution containing the resultant elastomeric polymer.
  • difunctional hydroxyl-terminated polymers including polyether glycols and polyester glycols can be used to form the prepolymers according to this invention.
  • the molecular weight of the difunctional hydroxyl-terminated polymers can advantageously be maintained above about 700 and preferably between about 1,000 and 4,000.
  • Difunctional hydroxy terminated polymers having a molecular weight below about 700 can also be used, but they generally do not result in end products having elasticity as advantageous as from those hydroxy polymers of big or molecular weight.
  • the value of such products produced with hydroxy polymers having a lower molecular weight will depend upon the end use of the product and the elasticity desired for that particular use.
  • the high molecular weight polyester glycols which can be used according to this invention are those which contain terminal hydroxyl groups.
  • the esters can be prepared by various known methods by reacting diacids, diesters, or diacid halides with glycols.
  • Suitable glycols which can be used to prepare the polyester glycols include polyalkylene glycols such as methylene, ethylene, propylene and butylene glycols.
  • Substituted polyalkylene glycols such as 2,2-dimethyl-1,3-propene diol as well as heterocyclic glycols such as cyclohexanone can also be used.
  • polyester glycols examples include succinic, adipic, suberic, sebacic, terephthalic, as well as various alkyl and halogen substituted derivatives of the acids.
  • the polyester glycol may for example be prepared by reacting the proper molar ratio of the acids or ester-forming derivatives of the acids with the glycols to produce the high molecular weight polymers.
  • the polyester glycols prepared by reacting 2 mols of polyethylene glycol or polypropylene glycol with 1 mol of adipic acid and then removing the glycol with heat and vacuum until a molecular weight of about 2,000 is reached can advantageously be used to form prepolymers according to this invention.
  • the polyether glycols which can be used to form the prepolymers according to this invention are polyalkylene ether glycols having terminal hydroxy groups.
  • the polyalkylene ether glycols can be prepared in known manners and are generally prepared by the polymerization of cyclic others such as alkylene oxides or from condensation of glycols.
  • the polyalkylene ether glycols are represented by the formula HO(RO),,H in which R is an alkylene radical and n is an integer sufficiently large so that the polyalkylene glycol has a molecular weight in excess of about 700 and preferably in excess of about 1,000.
  • the polyalkylene glycols can be prepared by copolymerizing mixtures of differen talkylene oxides or glycols.
  • polyalkylene ether glycols which can be used in this invention include polypropylene ether glycol, polytetramethylene ether glycol, polyethylene ether glycol, l,2-polydimethylethylene ether glycol, polydecamethylene ether glycol, and so forth. Further examples 3 of polyalkylene ether glycols which can be used according to this invention are described in Patent No. 2,492,959.
  • diisocyanates can be used to react with the difunctional hydroxy polymers to form the prepolymer.
  • Representative diisocyanates include 4-methyl-m-phenylene diisocyanate, m-phenylene diisocyanate, 4,4'-biphenylene diisocyanate, methylene bis (4-phenylisocyanate), 4-chloro-1,3-phenylene diisocyanate, 1,5-naphthalene diisocyanate, 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, 1,10-decamethylene diisocyanate, 1,4-cyclohexylene diisocyanate, 4,4'-methylene-bis(cyclohexylisocyanate), and 1,5 tetrahydronapthalene diisocyanate.
  • Arylene diisocyanates i.e., those in which each of the isocyanate groups is attached directly to an aromatic ring are preferred. In general, they react more rapidly than do the alkylene diisocyanates.
  • the diisocyanates may contain other substituents, although those which are free from reactive groups other than the two isocyanate groups are ordinarily preferred.
  • the isocyanate groups may be attached either to the same or to diiferent rings. Dimers of the monomeric diisocyanates and di(isocyanatoaryl)-ureas, such as di( 3-isocyanate-4-methylpheny1) urea may also be used.
  • the prepolymer is advantageously reacted with a compound containing at least 2 active hydrogens, such as a :liamine, in the presence of a solvent to form a solution containing the resultant elastomeric polymer.
  • a compound containing at least 2 active hydrogens such as a :liamine
  • the amount of diamine used can advantageously be stoichiometrically equivalent to the amount of prepolymer used, but even more or less than the amount can be used.
  • sufiicient diamine so that the viscosity 3f the resulting elastromeric polymer solution will have 1 viscosity of at least 50 poises or, advantageously, a viscosity between about 100 to 500 poises.
  • the amount of diamine that can be used form the elastomeric polymer solution can be varied :onsiderably depending on a number of factors such as he particular diamine used to react with the prepolymer, :he reactants used to form the prepolymer, the properties lesired to he possessed by the end products and so forth. these and other factors will be apparent to those skilled n the art and the exact amount of diamine that can most rdvantageously be used to prepare the polymer can be 'eadily determined by those skilled in the art by routine :xperimentation.
  • Various primary and secondary diarnines can be used 0 form the elastomeric polymers according to this invenion including aliphatic, allocyclic and inorganic diamines. lpecific examples of a number of diamines which can be rsed are hydrazine, ethylene diamine, piperazine, 1,4dimino-2-methyl piperazine, 1,4-diamino-2,5-dimethyl pi- IeraZine, methylimino bis propylamine, etc. It should also e apparent to those skilled in the art that combinations f two or more diamines may be used in the polymer.
  • Various solvents can be used to form the elastomeric olymer solutions, as will be apparent to those skilled 1 the art, such as dimethyl formamide, dimethyl sulfoxle, dimethyl acetamide, etc.
  • a ratio f 1:1 to 6:1 of the solvent to the polymer can be emloyed.
  • the coagulating bath which is generally Water, into hich the elastomeric polymer solution is extruded, builds 9 its solvent content during the process due to extraction of the solvent from the elastomeric polymer solution.
  • the extraction of the solvent initially takes place when the filaments are gathered together and pressure applied to the filaments to consolidate them into a fused multifilament fiber.
  • the pressure can be applied by any suitable means known to those skilled in the art such as pulling the filaments, under tension, down toward the apex of V-shaped grooves which have been cut in rollers, as shown in the drawing, or by leading the filaments through any suitable restricted area so as to press the filaments together into the multifilament fiber.
  • the solvent which builds up in the coagulating bath can be continuously removed during the process to maintain, advantageously, the solvent content at a desirable level, e.g. 40-60% solvent.
  • the extrusion speeds 0btainable will depend upon the bath temperature, the length of the bath, etc. Extrusion speeds of 150 feet per minute and higher have been obtained using a bath approximately 6 feet in length. The 150 feet per minute extrusion speed referred to above is not limiting since higher extrusion speeds can be obtained.
  • the temperature at which the chamber is maintained and the length of time in which the filaments, or the multifilament fibers, are exposed to this temperature will vary depending upon the particular operating conditions employed, the particular composition of the elastomeric polymer solution, and so forth. The most suitable time-temperature relationship for each operation is a matter which can readily be determined by one skilled in the art.
  • FIGURE 1 which is a top View of a spinning apparatus
  • an elastomeric polymer solution is extruded through a spinneret ll, into coagulating bath 2, to form a plurality of filaments 3.
  • These filaments are then passed over roll 4 and under roll 5 within the V-shaped grooves of each roll, 6 and 7 respectively.
  • Roll 5 is beneath roll 4 and parallel thereto.
  • the V-shaped grooves gather the filaments together and consolidate them into a fused multifilament fiber 8.
  • the multifilament fiber will be more tightly fused when the filaments are more firmly pressed toward the apex of the V-shaped grooves as the fiber is under tension.
  • the multifilament fiber 8 is then passed over roll 9 and under roll it) within the V-shaped grooves of each roll, 11 and 12 respectively.
  • Roll lltl is beneath roll 9 and parallel thereto.
  • Rolls 9 and it are laterally displaced with respect to rolls 4 and 5 so that when the multifilarnent fiber is drawn to the V-shaped grooves of rolls 9 and 10, it will tend to roll down the sides of the grooves, thus forming a twisted fiber 13.
  • This twisting action on the fiber efiects substantially complete consolidation or fusion of the filaments of the fiber and impants a roundness thereto.
  • the rolls 9 and 10 are laterally displaced at a distance that can be readily adjusted by routine experimentation to determine the most suitable displacement distance.
  • a lateral displacement which results in the multifilament fiber leaving roll 5 at an included angle of about (depending on the angle of the groove 11) with respect to the axis of rotation of roll 5 may be employed.
  • the sides of the V-shaped grooves of course can be concave or convex if desired and the angle of acuteness of the V-shape, as well as the extent of the lateral displacement can readily be adjusted with relation to each other to provide any suitable degree of twisting action desired.
  • FIGURE 2 shows a side View of FIGURE 1.
  • FIGURE 3 shows a more detailed View of roll 5 where the filaments have been gathered together to form the fused multifilament fiber 8.
  • FIGURE 4 shows a top view of a spinning apparatus wherein the rolls 9 and 10, instead of being laterally displaced and parallel to rolls 4 and 5, are placed at an angle with respect to rolls 4 and 5.
  • This angle as determined by the axis of the respective rolls, may be about 15 (depending on the angle of groove 11) or any other suitable angle which can readily be determined by routine experimentation so that the fiber will be subjected to a twisting action as it passes within the V-shaped grooves 11 and 12 of rolls 9 and 10.
  • FIGURE shows a more detailed view of roll 9 where the fiber tends to roll down the side of V-shaped groove 11. As the fiber is withdrawn from roll id it has become a twisted fiber 13.
  • FIGURE 6 is a cross-sectional view of the twisted multifilament fiber 13 and shows that the fiber is rounded and that there are substantially few interstices between the individual filaments of the fiber.
  • fibers are advantageously employed in making a material which will ultimately have seams made in it. If the fiber is punctured with a needle, for example, and relatively few filaments are broken, the fiber still retains the characteristics and properties of the original fiber to a substantial degree.
  • the fibers prepared according to this invention possess many of the advantages of both the mono-filament and multi-fdament fibers. Although these fibers are strong,
  • ulating bath to form a plurality of filaments, gathering together the filaments and applying sufiicient pressure to them, while they are in contact with the coagulating bath liquid and while they are in the state of semi-plastic flow, to consolidate them into a fused multifilament fiber, and subsequently imparting a twisting action to the multifilament fiber while it is in contact with the coagulating bath liquid and While it is in the state of semi-plastic flow.
  • the method of wet spinning isocyanate modified dihydroxy elastomeric polymers dissolved in a solvent to produce a multifilament fiber having a substantially round cross-section which comprises extruding the polymer solution through a plurality of orifices into a liquid coagulating bath to form a plurality of filaments, gathering together the filaments and applying sufficient pressure to them, while they are in contact with the coagulating bath liquid and while they are in the state of semi-plastic 6 flow, to consolidate them into a fused multifilament fiber, and subsequently imparting a twisting action to the multifilament fiber while it is in contact with the coagulating bath liquid and while it is in the state of semi-plastic flow, said twisting action being accomplished by rolling the multfilament fiber over a smooth surface.
  • An apparatus for treating isocyanate modified dihydroxy filaments formed by coagulating an isocyanate modified dihydroxy elastomeric polymer solution by extrusion into a fluid bath to form a plurality of filaments which comprises means for consolidating a plurality of said filaments into a fused multifilament fiber by imparting pressure to the plurality of filaments while they are still in the state of at least semi-plastic flow and in contact with the bath fluid, and means for imparting a twisting action to said fiber to effect substantially complete consolidation of the filaments making up the fiber and to impart a roundness theerto.
  • the means for consolidating a plurality of the filaments into a multifilament is a roller provided with a plurality of V-shaped grooves about its periphery through which the plurality of filaments are led.
  • the means for imparting a twisting action to the multifilament fiber is a pair of rollers positioned obliquely to the path of the fiber and containing l-shaped grooves about their periphery, whereby the fiber is passed, within the V- shaped grooves, over one roller and under the other.
  • the means for imparting a twisting action to the multifilament fiber is a pair of rollers containing V-shaped grooves about their periphery, said V-shaped grooves being displaced laterally to the path of the fiber so that as the fiber is passed, through the V-shaped grooves, over one roll and under the other, there is provided a twisting action on the fiber.
  • the means for imparting a twisting action to said fibers comprises a V-shaped groove lying in a plane which is angularly displaced from a plane of which the multifilament fiber is an element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Filaments (AREA)
US141530A 1961-09-28 1961-09-28 Method and apparatus for wet spinning elastomeric polymers into a fused multifilament fiber Expired - Lifetime US3161706A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL132223D NL132223C (en)van) 1961-09-28
NL291293D NL291293A (en)van) 1961-09-28
BE633256D BE633256A (en)van) 1961-09-28
US141530A US3161706A (en) 1961-09-28 1961-09-28 Method and apparatus for wet spinning elastomeric polymers into a fused multifilament fiber
FR930830A FR1361981A (fr) 1961-09-28 1963-04-08 Procédé et appareil pour le filage par voie humide de polymères élastomères

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US141530A US3161706A (en) 1961-09-28 1961-09-28 Method and apparatus for wet spinning elastomeric polymers into a fused multifilament fiber

Publications (1)

Publication Number Publication Date
US3161706A true US3161706A (en) 1964-12-15

Family

ID=22496086

Family Applications (1)

Application Number Title Priority Date Filing Date
US141530A Expired - Lifetime US3161706A (en) 1961-09-28 1961-09-28 Method and apparatus for wet spinning elastomeric polymers into a fused multifilament fiber

Country Status (4)

Country Link
US (1) US3161706A (en)van)
BE (1) BE633256A (en)van)
FR (1) FR1361981A (en)van)
NL (2) NL132223C (en)van)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283490A (en) * 1965-02-02 1966-11-08 Leesona Corp False twist spindle
US3287888A (en) * 1963-11-12 1966-11-29 Monsanto Co Apparatus for the treatment of synthetic filaments
US3342027A (en) * 1965-05-04 1967-09-19 Du Pont Coalesced multifilament yarn
US3409496A (en) * 1963-11-15 1968-11-05 Ici Ltd Twistless multifilament yarn of polyethylene terephthalate
US3409493A (en) * 1962-11-16 1968-11-05 Ici Ltd Process for twistless multifilament polyethylene terephthalate yarn
US3526689A (en) * 1968-04-03 1970-09-01 Union Carbide Corp Fused multifilament round spandex yarn
US3548047A (en) * 1967-02-23 1970-12-15 Union Carbide Corp Lubrication of spandex yarns
US3668853A (en) * 1969-06-20 1972-06-13 Kugelfischer G Schaefer & Co Friction crimping of synthetic threads
US4332752A (en) * 1978-10-02 1982-06-01 Akzo N.V. Process for production of dialysis membrane hollow fiber chains
US4392801A (en) * 1979-06-13 1983-07-12 Matthew Meyer Apparatus for manufacturing cheese product
US5174940A (en) * 1989-12-22 1992-12-29 The United States Of America As Represented By The Secretary Of The Air Force Method of extruding a single polymeric fiber
US5366362A (en) * 1989-12-22 1994-11-22 The United States Of America As Represented By The Secretary Of The Air Froce Apparatus for extruding a single aromatic heterocyclic polymeric fiber
US8282384B1 (en) * 2011-04-15 2012-10-09 Thomas Michael R Continuous curing and post curing apparatus

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2041798A (en) * 1931-01-15 1936-05-26 Celanese Corp Production of artificial materials
US2072926A (en) * 1930-02-26 1937-03-09 Celanese Corp Production of textile or other materials
US2079133A (en) * 1928-11-21 1937-05-04 Celanese Corp Treatment of threads and the like
US2149425A (en) * 1934-04-17 1939-03-07 Draemann Max Rubber thread and method of making same
US2786737A (en) * 1950-03-28 1957-03-26 British Celanese Wet spinning process
US2804645A (en) * 1953-05-12 1957-09-03 Du Pont Spinneret plate for melt spinning
US2923598A (en) * 1954-06-30 1960-02-02 Pittsburgh Plate Glass Co Method of forming filaments embodying polyurethane resins

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2079133A (en) * 1928-11-21 1937-05-04 Celanese Corp Treatment of threads and the like
US2072926A (en) * 1930-02-26 1937-03-09 Celanese Corp Production of textile or other materials
US2041798A (en) * 1931-01-15 1936-05-26 Celanese Corp Production of artificial materials
US2149425A (en) * 1934-04-17 1939-03-07 Draemann Max Rubber thread and method of making same
US2786737A (en) * 1950-03-28 1957-03-26 British Celanese Wet spinning process
US2804645A (en) * 1953-05-12 1957-09-03 Du Pont Spinneret plate for melt spinning
US2923598A (en) * 1954-06-30 1960-02-02 Pittsburgh Plate Glass Co Method of forming filaments embodying polyurethane resins

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3409493A (en) * 1962-11-16 1968-11-05 Ici Ltd Process for twistless multifilament polyethylene terephthalate yarn
US3287888A (en) * 1963-11-12 1966-11-29 Monsanto Co Apparatus for the treatment of synthetic filaments
US3365874A (en) * 1963-11-12 1968-01-30 Monsanto Co Treatment of synthetic filaments
US3409496A (en) * 1963-11-15 1968-11-05 Ici Ltd Twistless multifilament yarn of polyethylene terephthalate
US3283490A (en) * 1965-02-02 1966-11-08 Leesona Corp False twist spindle
US3342027A (en) * 1965-05-04 1967-09-19 Du Pont Coalesced multifilament yarn
US3548047A (en) * 1967-02-23 1970-12-15 Union Carbide Corp Lubrication of spandex yarns
US3526689A (en) * 1968-04-03 1970-09-01 Union Carbide Corp Fused multifilament round spandex yarn
US3668853A (en) * 1969-06-20 1972-06-13 Kugelfischer G Schaefer & Co Friction crimping of synthetic threads
US4332752A (en) * 1978-10-02 1982-06-01 Akzo N.V. Process for production of dialysis membrane hollow fiber chains
US4392801A (en) * 1979-06-13 1983-07-12 Matthew Meyer Apparatus for manufacturing cheese product
US5174940A (en) * 1989-12-22 1992-12-29 The United States Of America As Represented By The Secretary Of The Air Force Method of extruding a single polymeric fiber
US5366362A (en) * 1989-12-22 1994-11-22 The United States Of America As Represented By The Secretary Of The Air Froce Apparatus for extruding a single aromatic heterocyclic polymeric fiber
US8282384B1 (en) * 2011-04-15 2012-10-09 Thomas Michael R Continuous curing and post curing apparatus
US8580175B2 (en) 2011-04-15 2013-11-12 Michael R. Thomas Continuous curing and post-curing method
US9162402B2 (en) 2011-04-15 2015-10-20 Michael R. Thomas Continuous curing and post-curing method

Also Published As

Publication number Publication date
FR1361981A (fr) 1964-05-29
NL291293A (en)van)
NL132223C (en)van)
BE633256A (en)van)

Similar Documents

Publication Publication Date Title
US3161706A (en) Method and apparatus for wet spinning elastomeric polymers into a fused multifilament fiber
US2604667A (en) Yarn process
US2708617A (en) Formation of films and filament directly from polymer intermediates
US3111368A (en) Process for preparing spandex filaments
US3985934A (en) Polyimide fiber having a serrated surface and a process of producing same
US2813775A (en) Process for forming films and filaments directly from polymer intermediates
US3761348A (en) Bicomponent filament
US3079219A (en) Process for wet spinning aromatic polyamides
US2953839A (en) Elastomeric thread
US3180854A (en) Double diamine modification of urethane prepolymers
US3574811A (en) Polyamide wet-spinning and stretching process
CN116836360A (zh) 一种聚氨酯无纺布及其制备方法
US2942325A (en) Process of treating undrawn polyester yarns and filaments
US2813776A (en) Process for forming films and filaments directly from polymer intermediates
US3476850A (en) Low elongation set spandex filaments and process for the preparation thereof
US3047909A (en) Process for treating elastic fibers
US3557544A (en) Compositions and yarn made therefrom
US2922727A (en) Method of treating polyamide tire cord with caprolactam oligomers
US3009762A (en) Method of making polyurethane filamentary material
US2965437A (en) Process for wet spinning plasticized elastomeric polymers and subsequently removing the plasticizer
US3342027A (en) Coalesced multifilament yarn
US3047356A (en) Polyurethanes
US3630657A (en) Polyisocyanate treatment of polyurethane fibers
US3111369A (en) Elastic polyurethane filamentary material and method of making same
US3481905A (en) Polyurethane spinning solutions containing ethylene diamine and 1-amino-3-aminomethyl - 3,5,5 - trimethyl cyclohexane