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GB1318024A - Process for obtaining crimped fibres of acrylonitrile copolymers and polymer mixtures - Google Patents

Process for obtaining crimped fibres of acrylonitrile copolymers and polymer mixtures

Info

Publication number
GB1318024A
GB1318024A GB1142071*[A GB1142071A GB1318024A GB 1318024 A GB1318024 A GB 1318024A GB 1142071 A GB1142071 A GB 1142071A GB 1318024 A GB1318024 A GB 1318024A
Authority
GB
United Kingdom
Prior art keywords
fibres
filaments
weight
bath
acrylonitrile
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
GB1142071*[A
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.)
CTA COMP IND TEXTILES
Original Assignee
CTA COMP IND TEXTILES
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 CTA COMP IND TEXTILES filed Critical CTA COMP IND TEXTILES
Publication of GB1318024A publication Critical patent/GB1318024A/en
Expired 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
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
    • 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
    • D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/38—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated nitriles as the major constituent

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Filaments (AREA)

Abstract

1318024 Polyacrylonitrile filaments CTACOMPAGNIE INDUSTRIELLE DE TEXTILES ARTIFICIELS ET SYNTHETIQUES 26 April 1971 [24 April 1970] 11420/71 Heading B5B [Also in Division D1] A process for obtaining fibres of acrylonitrile polymers (containing more than 50% by weight of acrylonitrile units) possessing an inherent crimp comprises wet spinning a solution of the acrylonitrile polymer in an organic solvent into a coagulating bath consisting of a mixture of a solvent for the polymer, isopropanol and 0-2% of water; stretching the filaments so formed in a bath consisting of a solvent for the polymer, isopropanol and 0-2% of water and maintained at a temperature 80‹-95‹ C.; cutting the filaments to staple length and washing the fibres or the uncut filaments in an untensioned state; giving the fibres a relaxation treatment, without tension; and drying the fibres without tension. The coagulating bath and the stretching bath preferably are of the same composition and comprise 37-49% by weight of solvent, 61- 49% by weight of isopropanol and up to 2% by weight of water. The coagulating bath is maintained at a temperature below 30‹ C., preferably between 0‹ and 20‹ C. In a preferred embodiment, the filaments are given a preliminary stretch in air at ambient temperature prior to the stretching in the bath and at a lower ratio. The filaments are preferably stretched in the bath to a ratio between 5 and 10. The fibres are given a relaxation treatment by immersion in boiling water. The washing step is preferably performed in counter-current. The crimped, dried fibres may be given a heat treatment without tension to prevent or reduce subsequent shrinkage of the fibres. The organic solvents used include dimethylformamide, dimethylacetamide and dimethylsulphoxide. A definition of term 'acrylonitrile polymer' is given in the Specification and comprises copolymers, mixtures of polymers, and graft copolymers containing more than 50% by weight of acrylonitrile units and less than 50% by weight of units of one or more components from a list thereof.
GB1142071*[A 1970-04-24 1971-04-26 Process for obtaining crimped fibres of acrylonitrile copolymers and polymer mixtures Expired GB1318024A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7014955A FR2088772A5 (en) 1970-04-24 1970-04-24

Publications (1)

Publication Number Publication Date
GB1318024A true GB1318024A (en) 1973-05-23

Family

ID=9054520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1142071*[A Expired GB1318024A (en) 1970-04-24 1971-04-26 Process for obtaining crimped fibres of acrylonitrile copolymers and polymer mixtures

Country Status (8)

Country Link
US (1) US3737504A (en)
BE (1) BE762460A (en)
BR (1) BR7102329D0 (en)
DE (1) DE2119935A1 (en)
FR (1) FR2088772A5 (en)
GB (1) GB1318024A (en)
LU (1) LU62711A1 (en)
NL (1) NL7105471A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013753A (en) * 1973-10-09 1977-03-22 Bayer Aktiengesellschaft Process for the production of spontaneously crimping polyacrylonitrile composite fibres with improved crimp properties
US4332762A (en) * 1976-04-29 1982-06-01 E. I. Du Pont De Nemours And Company Process for preparing a spreadable acrylic fiber tow
NL177759B (en) * 1979-06-27 1985-06-17 Stamicarbon METHOD OF MANUFACTURING A POLYTHYTHREAD, AND POLYTHYTHREAD THEREFORE OBTAINED
US5902530A (en) * 1997-12-12 1999-05-11 The Standard Oil Company Process of making high nitrile composite filaments

Also Published As

Publication number Publication date
LU62711A1 (en) 1971-08-20
BR7102329D0 (en) 1973-04-10
NL7105471A (en) 1971-10-26
FR2088772A5 (en) 1972-01-07
US3737504A (en) 1973-06-05
DE2119935A1 (en) 1971-11-04
BE762460A (en) 1971-07-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees