US3732346A - Method to produce spun-drawn polycaprolactam yarn having improved resistance to ozone fading - Google Patents

Method to produce spun-drawn polycaprolactam yarn having improved resistance to ozone fading Download PDF

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Publication number
US3732346A
US3732346A US00062304A US3732346DA US3732346A US 3732346 A US3732346 A US 3732346A US 00062304 A US00062304 A US 00062304A US 3732346D A US3732346D A US 3732346DA US 3732346 A US3732346 A US 3732346A
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United States
Prior art keywords
filaments
roll
draw
yarn
improved resistance
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Expired - Lifetime
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US00062304A
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English (en)
Inventor
W Mallonee
P Saunders
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Honeywell International Inc
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Allied Chemical Corp
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    • 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

Definitions

  • this fading caused by exposure to ozone in the atmosphere, is measured by AE values determined by reading differences in fading between control and test specimens with a Hunter Lab D-25 Color Difference Meter, after exposure to ozone in an ozone generator for a standard time.
  • the samples are subjected to a non-ionic scour of 2.0 percent (OWF) tri-sodium phosphate and 0.5 percent (OWF) of a non-ionic surfactant (Triton X-100) by Rhom & Haas. Scour is carried out at 160 F. for 30 minutes. Then the samples are dyed with 0.807 percent (OWF) Celliton Fast Pink RF (GAF) CI Disperse Red 4), 0.465 percent (OWF) Celliton Fast Yellow (GAF) (CI Disperse Yellow 3), and 0.069 percent (OWF) Celliton Fast Blue FFRN (GAF (CI Disperse Blue 3) in the presence of the above scour additives.
  • the scour and the dyeing take place at 40:1 liquor ratio.
  • the dye bath is brought to 200 F. at a rate of 4 per minute and maintained at 200 F. for one hour.
  • the fabric is removed from dye bath, cooled, and tumble dryed. Samples are then ready for NE determination procedures.
  • ozone fading of continuous spundrawn yarn can be reduced by preparing uniformly oriented polycaproamide filaments by extruding a molten synthetic linear polycaproamide from a spinnerette to form filaments, quenching the filaments to provide a solid structure, applying finish, then immediately feeding the filaments with a heated feed roll through an air-cooling jet to a draw roll and withdrawing the filaments to a second draw roll, and finally winding the filaments into a package.
  • the preferred temperature on the heated feed roll is from about 80 to about 120 C.
  • the feed roll can be provided with a step roll and the draw roll can be provided with a lowered separator roll.
  • the draw roll can be cooled by blowing ambient air across it.
  • the draw ratio between the feed roll and the draw roll should be from about 1.01 to about 2.17.
  • Yarn temperature should be maintained by blowing room temperature air through the air cooling jet to obtain a temperature after the jet of from about 50 to about 70 C. when the yarn has been heated to a temperature from about to about C. by the heated feed roll.
  • the total draw ratio across the feed roll to the second draw roll should be from about 2 to about 5, preferably from 3.5 to about 4.6.
  • Resistance to ozone fading was significantly improved by (l) heating the yarn on the feed roll and (2) maintaining a high draw ratio by air cooling the yarn on the second roll; In this way fading was reduced from a AE value of more than 4.5 to a level of 2.5.
  • FIG. 1 is a schematic diagram of the apparatus used for the method and to make the produce of this invention.
  • FIG. 1 The apparatus used for this invention is shown in FIG. 1.
  • Yarn 1 leaves quench stack 2 below a spinnerette not shown.
  • Yam 1 then passes over finish roll 3 and on to feed roll 4 equipped with separator roll 41.
  • Air cooling jet 5 causes ambient temperature air to impinge upon the yarn as it is drawn between feed roll 4 and draw roll 6.
  • Separator 7 for draw roll 6 can be in normal position as shown, or in the lower separator roll position as shown by 7A.
  • Final draw step takes place between draw roll 6 and second draw roll 8 having separator roll 81.
  • Yarn 1 then passes to winder 9.
  • Table I shows successful operating conditions and yarn properties for three runs on a system having a step roll on the feed roll achieving a 1.09 draw ratio at 42 lbs/hr. output at 2250 denier, 140 filaments, Y cross-section yarn having a modification ratio greater than 3. Conventional finish achieving about a 7 percent pickup was used.
  • Draw roll 6 was air cooled by blowing ambient across it, and the second draw roll was maintained at a temperature of C. Other operating conditions and results are given in the table below.
  • UTS means ultimate tensile strength
  • UE means ultimate elongation
  • TM means tensile modulus.
  • Table II shows, in the first line of data, a run where no air jet was used. Note that the AE value is between 1.5 and 2.2 units higher than the runs using the air jet; this amounts to an improvement of over 30% to about 47% in resistance to ozone fading based on the original 4.7 AE value. Table II data is based on runs all using comparable feeder yarn.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US00062304A 1970-08-10 1970-08-10 Method to produce spun-drawn polycaprolactam yarn having improved resistance to ozone fading Expired - Lifetime US3732346A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6230470A 1970-08-10 1970-08-10

Publications (1)

Publication Number Publication Date
US3732346A true US3732346A (en) 1973-05-08

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Application Number Title Priority Date Filing Date
US00062304A Expired - Lifetime US3732346A (en) 1970-08-10 1970-08-10 Method to produce spun-drawn polycaprolactam yarn having improved resistance to ozone fading

Country Status (7)

Country Link
US (1) US3732346A (OSRAM)
BE (1) BE771151A (OSRAM)
CH (1) CH518381A (OSRAM)
DE (1) DE2140013A1 (OSRAM)
FR (1) FR2104200A5 (OSRAM)
GB (1) GB1310776A (OSRAM)
NL (1) NL7110989A (OSRAM)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009316A (en) * 1972-04-10 1977-02-22 Rohm And Haas Company Soil hiding, soil resistant fiber comprising a relatively major amount of a polyamide component and a minor amount of an acrylate polymer component
US4042662A (en) * 1970-05-13 1977-08-16 Akzona Incorporated Continuous melt spinning and drawing of nylon 6 yarn, while reducing the liveliness of the yarn
US4202854A (en) * 1977-12-23 1980-05-13 Monsanto Company Polyamide spin-texture process
US4396570A (en) * 1981-05-01 1983-08-02 Allied Corporation Nylon spin-draw process with steam conditioning
EP0826802A1 (de) * 1996-08-28 1998-03-04 B a r m a g AG Verfahren zum Spinnen eines multifilen Fadens

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042662A (en) * 1970-05-13 1977-08-16 Akzona Incorporated Continuous melt spinning and drawing of nylon 6 yarn, while reducing the liveliness of the yarn
US4009316A (en) * 1972-04-10 1977-02-22 Rohm And Haas Company Soil hiding, soil resistant fiber comprising a relatively major amount of a polyamide component and a minor amount of an acrylate polymer component
US4202854A (en) * 1977-12-23 1980-05-13 Monsanto Company Polyamide spin-texture process
US4396570A (en) * 1981-05-01 1983-08-02 Allied Corporation Nylon spin-draw process with steam conditioning
EP0826802A1 (de) * 1996-08-28 1998-03-04 B a r m a g AG Verfahren zum Spinnen eines multifilen Fadens
US5928587A (en) * 1996-08-28 1999-07-27 Barmag Ag Process and apparatus for cooling melt spun filaments during formation of a multi-filament yarn

Also Published As

Publication number Publication date
BE771151A (fr) 1971-12-16
CH518381A (de) 1972-01-31
DE2140013A1 (de) 1972-02-17
NL7110989A (OSRAM) 1972-02-14
FR2104200A5 (OSRAM) 1972-04-14
GB1310776A (en) 1973-03-21

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