GB889144A - Improvements in the drawing of polyamide yarns - Google Patents

Improvements in the drawing of polyamide yarns

Info

Publication number
GB889144A
GB889144A GB28654/58A GB2865458A GB889144A GB 889144 A GB889144 A GB 889144A GB 28654/58 A GB28654/58 A GB 28654/58A GB 2865458 A GB2865458 A GB 2865458A GB 889144 A GB889144 A GB 889144A
Authority
GB
United Kingdom
Prior art keywords
temperature
polyamide
transition temperature
yarn
stage
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
GB28654/58A
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 GB889144A publication Critical patent/GB889144A/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

Abstract

889,144. Drawing polyamide yarns. DU PONT DE NEMOURS & CO., E. I. Sept. 5, 1958 [Sept. 12, 1957], No. 28654/58. Drawings to Specification. Addition to 811,349. Class 2(2) A polyamide yarn is drawn in two or more stages, the first stage being such that the ratio of drawn length to undrawn length R 1 is determined by the equation R 1 (1+22.2B+284B<SP>2</SP>)=3À6Œ0À5 where B is the birefringence of the undrawn yarn. The yarn may be packaged prior to the first drawing stage. A freshly spun polyamide yarn may be drawn in two or more stages, the first stage being such that R 1 is determined by the equation R 1 (1+ 22.2B+ 284B <SP>2</SP>)=4À1 Œ 1À1 and the freshly spun yarn may be packaged following the first drawing stage. The areas defined by the above equations include part of the area defined by the equation set out in Claim 1 of the parent Specification, and the areas of overlap are specifically disclaimed. Desirably, the second drawing stage immediately follows the first drawing stage. Preferred polyamides are polyhexamethylene adipamide and polycaproamide and the polyamide yarn may have a second order transition temperature of about 50‹C. and a force-to-draw transition temperature in the vicinity of 150‹C. The first drawing step may be conducted at a temperature between the second-order transition temperature and the force-to-draw transition temperature, and the additional drawing steps at a temperature above the force-to-draw transition temperature but below the melting point of the polyamide, preferably at a temperature of at least 20‹C. below the melting temperature of the polyamide. In a preferred method, the amount in ‹C. by which the, temperature of the first drawing step exceeds the second-order transition temperature is equal to about two to ten times the rate of travel of the filaments into the drawing step in hundreds of yards per minute. Specifications 461,236, 461,237, 576,647 and U.S.A. Specifications 2,289,377 and 2,533,013 also are referred to.
GB28654/58A 1955-06-30 1958-09-05 Improvements in the drawing of polyamide yarns Expired GB889144A (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
GB889144A true GB889144A (en) 1962-02-07

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 Before (1)

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

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) IT595427A (en)
NL (1) NL112997C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4914724A (en) * 1972-06-08 1974-02-08
US4385170A (en) 1980-05-30 1983-05-24 Unitika Ltd. Melt-processable copolyamides having aromatic amide unit and fibers prepared therefrom

Families Citing this family (20)

* 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
NL279998A (en) * 1961-06-29
US3382307A (en) * 1963-07-23 1968-05-07 Snia Viscosa Process for the stretching of polyamidic fibres
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
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
CA1235269A (en) * 1983-10-20 1988-04-19 Asahi Kasei Kogyo Kabushiki Kaisha Polyhexamethylene adipamide fiber having high dimensional stability and high fatigue resistance, and process for preparation thereof
JPS61194209A (en) * 1985-02-20 1986-08-28 Toyobo Co Ltd High-tenacity polyamide fiber and production thereof
US5034182A (en) * 1986-04-30 1991-07-23 E. I. Du Pont De Nemours And Company Melt spinning process for polymeric filaments
US5141700A (en) * 1986-04-30 1992-08-25 E. I. Du Pont De Nemours And Company Melt spinning process for polyamide industrial 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
NL155414B (en) * 1947-05-30 Dassault Electronique FREQUENCY DETECTOR.
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
US2734794A (en) * 1951-07-12 1956-02-14 G cm-ton
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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4914724A (en) * 1972-06-08 1974-02-08
JPS554843B2 (en) * 1972-06-08 1980-02-01
US4385170A (en) 1980-05-30 1983-05-24 Unitika Ltd. Melt-processable copolyamides having aromatic amide unit and fibers prepared therefrom

Also Published As

Publication number Publication date
DE1260679B (en) 1968-02-08
BE571165A (en) 1958-09-30
FR1154335A (en) 1958-04-04
CA666693A (en) 1963-07-16
IT555778A (en)
FR1210212A (en) 1960-03-07
DE1260679C2 (en) 1977-01-20
CH352451A (en) 1961-02-28
BE549180A (en) 1956-07-14
US3093881A (en) 1963-06-18
NL112997C (en) 1966-07-15
US3091015A (en) 1963-05-28
GB811349A (en) 1959-04-02
IT595427A (en)

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