ES269475A1 - Manufacture of polyamide filaments - Google Patents

Manufacture of polyamide filaments

Info

Publication number
ES269475A1
ES269475A1 ES0269475A ES269475A ES269475A1 ES 269475 A1 ES269475 A1 ES 269475A1 ES 0269475 A ES0269475 A ES 0269475A ES 269475 A ES269475 A ES 269475A ES 269475 A1 ES269475 A1 ES 269475A1
Authority
ES
Spain
Prior art keywords
polyamide
water
chips
inert gas
pressure
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
ES0269475A
Other languages
Spanish (es)
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.)
British Nylon Spinners Ltd
Original Assignee
British Nylon Spinners Ltd
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 British Nylon Spinners Ltd filed Critical British Nylon Spinners Ltd
Publication of ES269475A1 publication Critical patent/ES269475A1/en
Expired legal-status Critical Current

Links

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
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/04—Melting filament-forming substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/46—Post-polymerisation treatment
    • 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
    • Y10S264/56—Processes of molding lactams

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)
  • Polyamides (AREA)

Abstract

In the manufacture of polyamide filaments by melting polycaprolactam chips at 250 DEG -295 DEG C. under an inert gas at a pressure of 0,5-5 atmospheres and melt spinning the polyamide, the chips have been washed with water but not dried or only incompletely dried and contain over 1/4 % by weight of water and the polyamide is maintained in a molten condition for a period not exceeding in minutes the expression:- <FORM:0918930/IV(a)/1> in which e=the base of the natural logarithms, T=temperature in DEG C., P=pressure in atmospheres of inert gas, E=sum of the free amine and carboxyl end groups in the polymer expressed in gram equivalents per million grams. The determination may be carried out on a sample of the polymer taken from the melt pool or on a sample of the extruded filaments. The earlier stages of the washing of the chips may be carried out with aqueous solutions, e.g. of caprolactam, pure water being subsequently used. The time during which the polyamide is maintained in a molten condition is preferably not more than 80% of the specified maximum permissible period. The inert gas may be nitrogen, steam, helium or hydrogen, preferably steam at within 3% of the prevailing atmospheric pressure. It is preferable to use polyamide chips containing over 3 1/2 % of water, e.g. up to 7% or over provided their water content is not so high as to cause caking or paste formation. Specifications 461,237, 653,757, 676,585, 747,913, 813,527, French Specification 882,461 and U.S.A. Specification 2,241,321 are referred to.
ES0269475A 1960-08-23 1961-07-31 Manufacture of polyamide filaments Expired ES269475A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29081/60A GB918930A (en) 1960-08-23 1960-08-23 Improvements in or relating to the manufacture of polyamide filaments

Publications (1)

Publication Number Publication Date
ES269475A1 true ES269475A1 (en) 1962-03-16

Family

ID=10285853

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0269475A Expired ES269475A1 (en) 1960-08-23 1961-07-31 Manufacture of polyamide filaments

Country Status (6)

Country Link
US (1) US3093445A (en)
CH (1) CH415943A (en)
DE (1) DE1469032A1 (en)
ES (1) ES269475A1 (en)
GB (1) GB918930A (en)
NL (1) NL268474A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL136087C (en) * 1962-01-15
US3271817A (en) * 1963-05-27 1966-09-13 Maurice S Kanbar Nylon melt-spinning apparatus
JPS5390420A (en) * 1977-01-13 1978-08-09 Teijin Ltd Polyamide yarn
US4632159A (en) * 1984-03-07 1986-12-30 Glasgo Marion L Clamp-on marking template and saw guide for making dovetail joints
DE3681628D1 (en) * 1985-04-22 1991-10-31 Basf Corp METHOD FOR QUICK SPINNING POLYAMIDE FIBERS.
DE3710803A1 (en) * 1987-03-31 1988-10-20 Basf Ag METHOD FOR REMOVING CAPROLACTAM AND ITS OLIGOMERS FROM SUCH CONTAINING POLYAMIDE GRANULES

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2571975A (en) * 1947-05-10 1951-10-16 Du Pont Melt spinning process

Also Published As

Publication number Publication date
US3093445A (en) 1963-06-11
CH415943A (en) 1966-06-30
DE1469032A1 (en) 1969-01-23
GB918930A (en) 1963-02-20
NL268474A (en)

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