US2285552A - Production of filaments - Google Patents

Production of filaments Download PDF

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Publication number
US2285552A
US2285552A US347492A US34749240A US2285552A US 2285552 A US2285552 A US 2285552A US 347492 A US347492 A US 347492A US 34749240 A US34749240 A US 34749240A US 2285552 A US2285552 A US 2285552A
Authority
US
United States
Prior art keywords
filaments
temperature
filament
water
cold
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
US347492A
Other languages
English (en)
Inventor
Alfthan Johannes
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 BE461575D priority Critical patent/BE461575A/xx
Priority to NL56120D priority patent/NL56120C/xx
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US347492A priority patent/US2285552A/en
Priority to GB9451/41A priority patent/GB550852A/en
Application granted granted Critical
Publication of US2285552A publication Critical patent/US2285552A/en
Priority to FR917428D priority patent/FR917428A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides

Definitions

  • This invention relates to the production of filaments of synthetic linear condensation 1937 now Patent No. 2,130,948, all of w. H.
  • Carothers are capable of being formed by melt-spinning into filaments, ribbons, and the like, which possess the unusual property of being capable of being cold-drawn," i. e., drawn or elongated under application of stress in the solid state, with resulting orientation of internal structure and corresponding marked benefits to their mechanical properties.
  • filaments of synthetic linear condensation polymers particularly to coarser filaments
  • the production of filaments of circular cross section may readily be accomplished by following the teachings of the prior art but this has not been the case with respect to filaments of polymeric hexamethylene adipamide.
  • An object of the present invention is to provide a process of manufacturing polymeric hexamethylene adipamide filaments which are substantially perfectly circular in cross section.
  • a further object is to provide such a process which will produce filaments in no way impairedwith respect to their other properties.
  • the above objects are accomplished according to the present invention by extruding molten polymeric hexamethylene adipamide through a circular orifice into a quenching liquid having substantially'no solvent action on the polymer and maintained at .atemperature of at least 35 C.
  • theiquenching liquid is water and, for practicaloperationpit would be kept at a temperature of 35F-4Q" C.
  • the filament is subsequently cold-drawn after being thoroughly soaked in water or many be cold-drawn at a temperature somewhat above room temperature.
  • the present invention resides in the discovery that, if extruded filaments of polymeric hexamethylene adipamide are quenched in a non-solvent quenching liquid maintained at a temperature of 35 C. or more, the cross sectional shape of the extruded filament is not changed but retains the shape of the orifice through which the molten polymer was extruded. This is especially observable in the manufacture of coarser filaments and it is the manufacture of such filaments to which the present invention is most advantageously applicable.
  • the filament thus quenched is preferably soaked in water before being cold-drawn, or is cold-drawn while at a temperature somewhat above room temperature, either of which techniques facilitates the cold-drawing.
  • the molpolymer may be molten when it contacts the quenching liquid or may be set or partially set subsequent operationsunder commercial conditions. Specimens of filaments thus produced were drawn by hand, i. e., stretched by'hand until they ceased to yield, without any intermediate treatment. Filaments quenchedin the quenching liquid maintained at 40 C. or less 7 could be drawn satisfactorily in this manner.
  • filament specimens quenched at 70 C. could be Temperature Time of soak- Deviation of quenching ing before from liquid drawing circularity 0. Days Percent 12 l 31. 6 20 l 21. 1 25 l 12. 8 i0 1 7. 2 l 1. 9 l) 1. 7) 40) 2) 2. 9) 2 1. 4 2 1. 4 70) 2) l. 3) 70) 3) I. 6) 80) 2) 2. 4) 80) 3) l. 9)
  • the quenching liquid may consist of a mixture of compounds. Also, it may contain wetting agents, dyes, and the like.
  • the quenching liquid is used in the form of a bath or a spray although the former is apt to be more convenient.
  • the temperature of the liquid may be regulated or kept constant by any suitable means.
  • the colddrawing is facilitated by first soaking the filament in water, the duration of said soaking being regulated to avoid any difiiculty in, the cold drawing. Usually a period of 24 hours will be suificient but, as shown hereinbefore, a soaking of 48 hours or even longer maybe desirable where the filament has been quenched in a liquid maintained at a relatively high temperature. Rather than soaking the filament in water, it may be warmed to a temperature of from about 50 C.
  • the present invention provides a method of ensuring'the substantiahcircularity of cross sections of filaments of polymeric hexamethylene extruded from a circular orifice and is of great practical value in the production of filaments of this material for uses in which circularity of the filament is of prime importance.
  • This circularity oi the filament is achieved in accordance with this invention at some sacrifice of tensile strength but without significant impairment of the other important properties of the filament.
  • Process of manufacturing filaments of polymeric hexamethylene adipamide of circular cross section which comprises extruding molten polymer through a circular orifice into a quenching liquid having substantially no solvent action on said polymer and maintained at a temperature of 35 C. to 45 C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)
US347492A 1940-07-25 1940-07-25 Production of filaments Expired - Lifetime US2285552A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE461575D BE461575A (fr) 1940-07-25
NL56120D NL56120C (fr) 1940-07-25
US347492A US2285552A (en) 1940-07-25 1940-07-25 Production of filaments
GB9451/41A GB550852A (en) 1940-07-25 1941-07-25 Filaments, monofils and like structures of polymeric hexamethylene adipamide
FR917428D FR917428A (fr) 1940-07-25 1945-11-14 Procédé de fabrication de filaments à partir de matières synthétiques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US347492A US2285552A (en) 1940-07-25 1940-07-25 Production of filaments

Publications (1)

Publication Number Publication Date
US2285552A true US2285552A (en) 1942-06-09

Family

ID=23363917

Family Applications (1)

Application Number Title Priority Date Filing Date
US347492A Expired - Lifetime US2285552A (en) 1940-07-25 1940-07-25 Production of filaments

Country Status (5)

Country Link
US (1) US2285552A (fr)
BE (1) BE461575A (fr)
FR (1) FR917428A (fr)
GB (1) GB550852A (fr)
NL (1) NL56120C (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484523A (en) * 1945-01-04 1949-10-11 Du Pont Process for making polyamide filaments
US2509741A (en) * 1942-11-03 1950-05-30 Du Pont Production of filamentous structures
US2558731A (en) * 1947-09-04 1951-07-03 American Cyanamid Co Method of producing synthetic fibers from polymers and copolymers of acrylonitrile
DE863702C (de) * 1949-11-24 1953-01-19 Kunstseidefabrik Bobingen Verfahren zum Heissverstrecken von thermoplastischen Faeden
US2674025A (en) * 1949-08-15 1954-04-06 Texiclon Corp Polymeric filaments
US3018157A (en) * 1954-10-28 1962-01-23 Du Pont Process of producing uniformly dyeing polyacrylonitrile filaments by heat stretching the water wetted filaments
US3057040A (en) * 1959-06-18 1962-10-09 Du Pont Monofilaments
US3059991A (en) * 1959-03-20 1962-10-23 E B & A C Whiting Company Method of making oriented filamentary article of isotactic polypropylene
US3063189A (en) * 1962-01-02 1962-11-13 Du Pont Fishing line
EP3231900A1 (fr) 2016-04-13 2017-10-18 Xerox Corporation Filaments composites de nanoparticules d'argent et de polyester sulfoné revêtu de polymère et leurs procédés de fabrication
EP3231590A1 (fr) 2016-04-13 2017-10-18 Xerox Corporation Filaments composites de nanoparticules d'argent et de polyester sulfoné et leurs procédés de fabrication

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE472049A (fr) * 1946-03-22

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2509741A (en) * 1942-11-03 1950-05-30 Du Pont Production of filamentous structures
US2484523A (en) * 1945-01-04 1949-10-11 Du Pont Process for making polyamide filaments
US2558731A (en) * 1947-09-04 1951-07-03 American Cyanamid Co Method of producing synthetic fibers from polymers and copolymers of acrylonitrile
US2674025A (en) * 1949-08-15 1954-04-06 Texiclon Corp Polymeric filaments
DE863702C (de) * 1949-11-24 1953-01-19 Kunstseidefabrik Bobingen Verfahren zum Heissverstrecken von thermoplastischen Faeden
US3018157A (en) * 1954-10-28 1962-01-23 Du Pont Process of producing uniformly dyeing polyacrylonitrile filaments by heat stretching the water wetted filaments
US3059991A (en) * 1959-03-20 1962-10-23 E B & A C Whiting Company Method of making oriented filamentary article of isotactic polypropylene
US3057040A (en) * 1959-06-18 1962-10-09 Du Pont Monofilaments
US3063189A (en) * 1962-01-02 1962-11-13 Du Pont Fishing line
EP3231900A1 (fr) 2016-04-13 2017-10-18 Xerox Corporation Filaments composites de nanoparticules d'argent et de polyester sulfoné revêtu de polymère et leurs procédés de fabrication
EP3231590A1 (fr) 2016-04-13 2017-10-18 Xerox Corporation Filaments composites de nanoparticules d'argent et de polyester sulfoné et leurs procédés de fabrication
US9863065B2 (en) 2016-04-13 2018-01-09 Xerox Corporation Polymer coated sulfonated polyester—silver nanoparticle composite filaments and methods of making the same
US9877485B2 (en) 2016-04-13 2018-01-30 Xerox Corporation Silver polyester-sulfonated nanoparticle composite filaments and methods of making the same

Also Published As

Publication number Publication date
GB550852A (en) 1943-01-27
FR917428A (fr) 1947-01-07
NL56120C (fr)
BE461575A (fr)

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