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GB905997A - Improvement in the production of polyvinyl alcohol yarns - Google Patents

Improvement in the production of polyvinyl alcohol yarns

Info

Publication number
GB905997A
GB905997A GB3756060A GB3756060A GB905997A GB 905997 A GB905997 A GB 905997A GB 3756060 A GB3756060 A GB 3756060A GB 3756060 A GB3756060 A GB 3756060A GB 905997 A GB905997 A GB 905997A
Authority
GB
United Kingdom
Prior art keywords
vapour
polyvinyl alcohol
yarns
alcohol
drawn
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
GB3756060A
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.)
Rhodiaceta SA
Original Assignee
Rhodiaceta SA
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 Rhodiaceta SA filed Critical Rhodiaceta SA
Publication of GB905997A publication Critical patent/GB905997A/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
    • D02J1/222—Stretching in a gaseous atmosphere or in a fluid bed
    • 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
    • D01F6/14—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 alcohols, e.g. polyvinyl alcohol, or of their acetals or ketals
    • 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
    • D01F6/34—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 alcohols, acetals or ketals 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)
  • Artificial Filaments (AREA)

Abstract

Polyvinyl alcohol yarns, free from spinning solvent, are drawn at 180 DEG -230 DEG C. in the vapour of a boiling organic liquid boiling within this temperature range at atmospheric pressure, and which, in this temperature range, is a non-solvent for, and chemically inert to, the polyvinyl alcohol. The term "yarns" is so defined as to include tows. The term "polyvinyl alcohol" includes long-chain synthetic polymers composed of at least 50% by weight of vinyl alcohol units. The vapour may be saturated or superheated, and may be that of a hydrocarbon, e.g. decahydronaphthalene, or an alcohol, e.g. benzyl alcohol. In Examples (1), a 145 denier, 20 filament, 1,3 turns per inch polyvinyl alcohol yarn is drawn 6x in decahydronaphthalene vapour at 198 DEG C., at a yarn speed of 490 feet/minute with a residence time in the vapour of 0,28 seconds, (2), an identical yarn is drawn 6,5x in benzyl alcohol vapour at 205 DEG C., at a yarn speed of 525 feet/minute. The process of the invention reduces the time otherwise necessary to bring yarns into thermal equilibrium, and thus enables drawing to be effected in apparatus of reduced dimensions.
GB3756060A 1959-11-03 1960-11-01 Improvement in the production of polyvinyl alcohol yarns Expired GB905997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR809191A FR1248515A (en) 1959-11-03 1959-11-03 Further development in the manufacture of polyvinyl alcohol yarns

Publications (1)

Publication Number Publication Date
GB905997A true GB905997A (en) 1962-09-19

Family

ID=8720847

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3756060A Expired GB905997A (en) 1959-11-03 1960-11-01 Improvement in the production of polyvinyl alcohol yarns

Country Status (4)

Country Link
CH (1) CH387869A (en)
FR (1) FR1248515A (en)
GB (1) GB905997A (en)
NL (1) NL99506C (en)

Also Published As

Publication number Publication date
CH387869A (en) 1965-02-15
NL99506C (en)
FR1248515A (en) 1960-12-16

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