ES311068A1 - Process for stretching filaments acsa applicazioni chimiche s.p.a. - Google Patents

Process for stretching filaments acsa applicazioni chimiche s.p.a.

Info

Publication number
ES311068A1
ES311068A1 ES0311068A ES311068A ES311068A1 ES 311068 A1 ES311068 A1 ES 311068A1 ES 0311068 A ES0311068 A ES 0311068A ES 311068 A ES311068 A ES 311068A ES 311068 A1 ES311068 A1 ES 311068A1
Authority
ES
Spain
Prior art keywords
nano
kno
per cent
filaments
weight per
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
ES0311068A
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.)
A C S A Applic Chimiche SpA
Original Assignee
A C S A Applic Chimiche SpA
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 A C S A Applic Chimiche SpA filed Critical A C S A Applic Chimiche SpA
Publication of ES311068A1 publication Critical patent/ES311068A1/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
    • D02J1/223—Stretching in a liquid bath
    • 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

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

Abstract

Filaments of acrylonitrile polymer are stretched in an anhydrous bath consisting of at least one molten inorganic water-soluble salt at a temperature between 140 and 200 C., preferably between 150 and 170 C. The term " acrylonitrile polymer " is defined to include polyacrylonitrile as homopolymer or copolymer (for example block or graft copolymer) or mixtures thereof which contain at least 85 weight per cent of polyacrylonitrile and up to 15 weight per cent of one or more polymerized and compatible ethylenically unsaturated monomers the term " filaments " is defined to include monofilaments, fibres and tow obtained by wet or dry spinning. The bath preferably consists of a mixture of salts having a melting point not higher than 160 C. and may consist of binary and ternary mixtures of alkali metal nitrates and/or nitrites, for example binary mixtures of KNO 3 -NaNO 2 , KNO 2 -NaNO 3 and KNO 3 -LiNO 3 , and ternary mixtures of KNO 3 -NaNO 3 -NaNO 2 and If desired, the stretching may be repeated one or more times at the same or at different temperatures. Filaments of low denier, for example of denier, may be obtained. Examples describe the stretching of tows obtained by wet spinning a solution of a copolymer of 93 weight per cent of acrylonitrile and 7 weight per cent of vinyl acetate in dimethylacetamide, the molten salt bath consisting of a binary mixture of KNO 3 and NaNO 2 in a weight ratio of 60: 40 (Example 1) a binary mixture of KNO 2 and NaNO 3 in a weight ratio of 50: 50 (Example 2) and a ternary mixture of KNO 3 , NaNO 3 and NaNO 2 in a weight ratio of 57: 3: 40 (Example 3).
ES0311068A 1964-03-18 1965-03-18 Process for stretching filaments acsa applicazioni chimiche s.p.a. Expired ES311068A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT599564 1964-03-18

Publications (1)

Publication Number Publication Date
ES311068A1 true ES311068A1 (en) 1965-09-01

Family

ID=11120840

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0311068A Expired ES311068A1 (en) 1964-03-18 1965-03-18 Process for stretching filaments acsa applicazioni chimiche s.p.a.

Country Status (6)

Country Link
BE (1) BE661307A (en)
ES (1) ES311068A1 (en)
FR (1) FR1426683A (en)
GB (1) GB1080917A (en)
NL (1) NL6503104A (en)
SE (1) SE314470B (en)

Also Published As

Publication number Publication date
SE314470B (en) 1969-09-08
NL6503104A (en) 1965-09-20
FR1426683A (en) 1966-01-28
BE661307A (en) 1965-09-20
GB1080917A (en) 1967-08-31

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