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GB811349A - Improvements in or relating to the drawing of polyamide structures and especially nylon filaments - Google Patents

Improvements in or relating to the drawing of polyamide structures and especially nylon filaments

Info

Publication number
GB811349A
GB811349A GB20296/56A GB2029656A GB811349A GB 811349 A GB811349 A GB 811349A GB 20296/56 A GB20296/56 A GB 20296/56A GB 2029656 A GB2029656 A GB 2029656A GB 811349 A GB811349 A GB 811349A
Authority
GB
United Kingdom
Prior art keywords
temperature
polyamide
stage
products
stage drawing
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
Application number
GB20296/56A
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
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB811349A publication Critical patent/GB811349A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/228—Stretching in two or more steps, with or without intermediate steps
    • 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
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/61—Processes of molding polyamide

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)

Abstract

Synthetic linear polyamide filaments, films and like products are drawn in two or more stages, each at a temperature below the softening temperature of the polyamide, the first stage being so effected that the ratio of the drawn length to the undrawn length is R1\sB0.4, R1 being determined in accordance with the equation <FORM:0811349/IV (a)/1> where B is the birefringence of the undrawn polyamide material, i.e. the absolute difference in refractive indices along and perpendicular to the axis of the material in unswollen condition. When the birefringence of the polyamide products is 0 to 0.005, R1 may be taken as (4.1\sB0.4)-200B. The drawing stages are preferably effected at a temperature not higher than about 20 DEG C. below the melting temperature of the polyamide, but not below the second order transition temperature. Preferably, also, the first-stage drawing temperature is below the subsequent stage drawing temperatures. The optimum first-stage drawing temperature varies with the rate at which the products enter the drawing zone, the relation being such that, in general, the lower the feeding speed, the closer the first-stage drawing temperature should be to the second order transition temperature. Where a temperature gradient exists in the drawing element, the temperature maximum at the region of maximum tension in the products is the selected first-stage drawing temperature. In an example, freshly formed 140-filament nylon yarn of 4,800 total denier having a birefringence of 0.004 is advanced around a snubbing pin heated to 75 DEG C. to a set of rolls which give a first-stage draw ratio of 3.3. The yarn then passes directly to and over a pipe having a surface temperature of 190 DEG C. in 3 wraps, and thence to a second set of rolls which effect a draw ratio of 1.77, giving a total draw ratio of 5.84. A two-stage drawing process may be carried out without controlling rolls intervening between the stages.
GB20296/56A 1955-06-30 1956-06-29 Improvements in or relating to the drawing of polyamide structures and especially nylon filaments Expired GB811349A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US352451XA 1955-06-30 1955-06-30
US889144XA 1957-09-12 1957-09-12
US799054A US3091015A (en) 1955-06-30 1959-03-12 Drawing of nylon
US260981A US3093881A (en) 1955-06-30 1963-02-26 Oriented nylon filaments

Publications (1)

Publication Number Publication Date
GB811349A true GB811349A (en) 1959-04-02

Family

ID=32475655

Family Applications (2)

Application Number Title Priority Date Filing Date
GB20296/56A Expired GB811349A (en) 1955-06-30 1956-06-29 Improvements in or relating to the drawing of polyamide structures and especially nylon filaments
GB28654/58A Expired GB889144A (en) 1955-06-30 1958-09-05 Improvements in the drawing of polyamide yarns

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB28654/58A Expired GB889144A (en) 1955-06-30 1958-09-05 Improvements in the drawing of polyamide yarns

Country Status (9)

Country Link
US (2) US3091015A (en)
BE (2) BE549180A (en)
CA (1) CA666693A (en)
CH (1) CH352451A (en)
DE (1) DE1260679C2 (en)
FR (2) FR1154335A (en)
GB (2) GB811349A (en)
IT (2) IT555778A (en)
NL (1) NL112997C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3111364A (en) * 1959-05-13 1963-11-19 American Enka Corp Process for drawing a continuous, unwashed, undrawn polycapolactam filament
US3382307A (en) * 1963-07-23 1968-05-07 Snia Viscosa Process for the stretching of polyamidic fibres

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL279998A (en) * 1961-06-29
US3379810A (en) * 1963-08-02 1968-04-23 Toyo Rayon Co Ltd Process for the manufacture of high tenacity nylon filaments
US3402152A (en) * 1964-05-15 1968-09-17 Monsanto Co Process for preparing a polyamide
US3386967A (en) * 1965-01-19 1968-06-04 Allied Chem Polycaproamide having excess number of carboxyl end groups over amino end groups
NL135751C (en) * 1965-03-26
US3321448A (en) * 1965-09-16 1967-05-23 Du Pont Nylon staple fiber for blending with other textile fibers
US3472016A (en) * 1966-07-11 1969-10-14 American Enka Corp Synthetic yarns,fabrics and processes for making the same
US3481136A (en) * 1967-12-11 1969-12-02 Celanese Corp Process for producing polyester yarn
JPS554843B2 (en) * 1972-06-08 1980-02-01
JPS57130A (en) 1980-05-30 1982-01-05 Unitika Ltd Melt-moldable copolyamide having aromatic amide unit
GB2101522B (en) * 1981-01-26 1984-05-31 Showa Denko Kk Producing high tenacity monofilaments
JPS5865008A (en) * 1981-09-08 1983-04-18 Toyobo Co Ltd Polyamide fiber with high strength and its production
JPS58136823A (en) * 1982-02-06 1983-08-15 Toyobo Co Ltd Polyamide fiber
CA1198255A (en) * 1982-07-08 1985-12-24 Kazuyuki Kitamura High tenacity polyhexamethylene adipamide fiber
DE3437943A1 (en) * 1983-10-20 1985-05-02 Asahi Kasei Kogyo K.K., Osaka POLYHEXAMETHYLENE ADIPINE ACID FIBER WITH HIGH TEMPERATURE AND HIGH FATIGUE RESISTANCE AND METHOD FOR THE PRODUCTION THEREOF
JPS61194209A (en) * 1985-02-20 1986-08-28 Toyobo Co Ltd High-tenacity polyamide fiber and production thereof
US5141700A (en) * 1986-04-30 1992-08-25 E. I. Du Pont De Nemours And Company Melt spinning process for polyamide industrial filaments
US5034182A (en) * 1986-04-30 1991-07-23 E. I. Du Pont De Nemours And Company Melt spinning process for polymeric filaments
CA2088458A1 (en) * 1992-01-30 1993-07-31 Cheng-Kung Liu Polyamide monofilament suture manufactured from higher order polyamide
US5279783A (en) * 1992-01-30 1994-01-18 United States Surgical Corporation Process for manufacture of polyamide monofilament suture

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE435100A (en) * 1938-11-01
NL53445C (en) * 1938-11-02
US2289232A (en) * 1939-07-14 1942-07-07 Du Pont Method and apparatus for producing filamentary structures
DE918833C (en) * 1942-07-01 1954-10-07 Bayer Ag Process for the production of threads, wires, ribbons and. Like. From heat-sensitive, polymeric vinyl compounds in two stages
BE465536A (en) * 1942-11-03
FR962278A (en) * 1946-05-25 1950-06-07
BE498035A (en) * 1947-05-30
BE482722A (en) * 1947-05-30
US2474927A (en) * 1947-06-24 1949-07-05 Ray C Young Cord stretching apparatus
US2556295A (en) * 1947-07-23 1951-06-12 Du Pont Process of drawing formed structures of synthetic linear polyesters
US2637893A (en) * 1949-03-12 1953-05-12 Shaw Gilbert Artificial filament
NL153050B (en) * 1949-04-27 Nederlanden Staat TWO-POLE FOR MISMITING THE CHARACTERISTIC IMPEDANCE OF A PUPINIZED CABLE LOADER PAIR.
US2611923A (en) * 1949-08-31 1952-09-30 Du Pont Method and apparatus for the drawing of synthetic funicular structures
US2615784A (en) * 1949-12-20 1952-10-28 Du Pont Polyethylene terephthalate monofils drawn and heat set for use as bristles
BE512777A (en) * 1951-07-12
US2778057A (en) * 1953-04-02 1957-01-22 Stanley M Clark Method and apparatus for continuously stretching plastic film
NL96257C (en) * 1954-06-30
US2807863A (en) * 1956-06-22 1957-10-01 Du Pont Multi-step stretching of nylon cords

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3111364A (en) * 1959-05-13 1963-11-19 American Enka Corp Process for drawing a continuous, unwashed, undrawn polycapolactam filament
US3382307A (en) * 1963-07-23 1968-05-07 Snia Viscosa Process for the stretching of polyamidic fibres

Also Published As

Publication number Publication date
FR1154335A (en) 1958-04-04
IT595427A (en)
IT555778A (en)
FR1210212A (en) 1960-03-07
BE549180A (en) 1956-07-14
US3091015A (en) 1963-05-28
BE571165A (en) 1958-09-30
GB889144A (en) 1962-02-07
CH352451A (en) 1961-02-28
DE1260679B (en) 1968-02-08
US3093881A (en) 1963-06-18
DE1260679C2 (en) 1977-01-20
NL112997C (en) 1966-07-15
CA666693A (en) 1963-07-16

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