EP0350025B1 - Befeuchtung von Spulengattern - Google Patents

Befeuchtung von Spulengattern Download PDF

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Publication number
EP0350025B1
EP0350025B1 EP89112353A EP89112353A EP0350025B1 EP 0350025 B1 EP0350025 B1 EP 0350025B1 EP 89112353 A EP89112353 A EP 89112353A EP 89112353 A EP89112353 A EP 89112353A EP 0350025 B1 EP0350025 B1 EP 0350025B1
Authority
EP
European Patent Office
Prior art keywords
yarn
yarns
creel
never
enclosure
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 - Lifetime
Application number
EP89112353A
Other languages
English (en)
French (fr)
Other versions
EP0350025A2 (de
EP0350025A3 (de
Inventor
Terry Song-Hsing Chern
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP0350025A2 publication Critical patent/EP0350025A2/de
Publication of EP0350025A3 publication Critical patent/EP0350025A3/de
Application granted granted Critical
Publication of EP0350025B1 publication Critical patent/EP0350025B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D06M15/05—Cellulose or derivatives thereof
    • D06M15/09—Cellulose ethers
    • 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
    • D01F6/605—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides from aromatic polyamides
    • 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
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected

Definitions

  • This invention relates to a process for treating never-dried p-aramid yarns and a method for maintaining controlled moisture content on wet, never-dried, fibers prior to further processing steps.
  • never-dried fibers can be supplied from creel storage and subjected to continued treatments which require the use of wet feed yarns.
  • fibers are kept on spools or other packages in a creel enclosure with controlled humidity awaiting further processing and this invention relates to maintaining a controlled humidity in the enclosure.
  • the feed for such yarns can, of course, be provided on-line from wet-spinning manufacture but, because the subsequent treatments are nearly always much slower than the spinning process, on-line wet yarn supply causes a serious fiber production bottleneck.
  • creel for holding and supplying yarns from several yarn spool sources was used.
  • creels could not successfully be used to supply wet yarns because the amount of moisture on the supply yarns was not constant and that led to interrupted process operation and inconsistent product qualities.
  • the yarn in the creel must be maintained at a constant, controlled, moisture level.
  • Another example of a process where a certain moisture content in wet feed yarn is important is a process wherein yarns are colored or treated by an imbibition process such as in British Patent 1,438,067.
  • an imbibition process such as in British Patent 1,438,067.
  • precursor yarns it is desirable for precursor yarns to have a certain, controlled, MOY before being placed into the imbibition bath; and in the process of that reference, the wet-spun feed yarns are supplied from immersion.
  • the invention as claimed in claims 1 and 3 solves the problem of maintaining a high yarn moisture content during storage and unwinding.
  • Packages of never-dried yarn can be mounted in a creel on package support means comprising a plurality of spindles arranged for unwinding yarn from said packages, maintaining the atmosphere surrounding the packages at a high humidity.
  • the spindles are mounted in an enclosure means for providing at least a partial envelope about the spindles and the packages.
  • a humidity controlling means comprising gas circulation means for circulating gas through the envelope, moisture supply means for supplying moisture to the circulating gas, humidity measurement means for measuring the humidity of the gas being circulated, and control means responsive to said humidity measurement means for actuating said moisture supply means such that the atmosphere inside the envelope and in contact with yarn mounted therein can be maintained at a relatively high, controlled, humidity.
  • Fig. 1 is a simplified representation of the creel of this invention.
  • Fig. 2 is a simplified representation of the humidity controlling means of this invention.
  • Fig. 3 is a simplified representation, in partial section, of the humidity center which includes moisture supply means, humidity measurement means, and control means.
  • Fig. 1 represents a preferred apparatus for practice of this invention.
  • Enclosure 10 has sides 11 and 12 (shown to be transparent) adjacent to package support means and humidity controlling means.
  • Package support means includes rails 16 for holding spindles 17 on which are mounted packages 18.
  • Packages 18 are the spools or bobbins or cones or other packages of never-dried fibers to be treated in this invention.
  • Mounted on beam 19 above and near to spindles 17 are take-off/tensioning guides 20.
  • Yarn 21 from packages 18 is removed from enclosure 10 over guides 20.
  • Each rail 16 can have a plurality of spindles 17 mounted such that yarn 21 can be removed easily therefrom; and each yarn 21 is guided over and past guide 20 such that the yarns 21 are removed from enclosure 10 as a warp 22.
  • Enclosure 10 (as well as other extended component parts of Fig. 1) is shown as broken at the ends because it can be of any, indefinite, length.
  • the purpose of enclosure 10 is to contain a humid atmosphere and enclosure 10 can, therefore, also include ends and a bottom and top, as well as sides 11 and 12, if such are deemed desirable as useful.
  • the humidity controlling means includes gas circulation means 23 with humidity center 24.
  • Humidity center 24 includes moisture supply means 25, humidity measurement means 26, and control means 27 mounted in operative relation thereto.
  • Gas circulation means 23 includes sections 28 and 29 each of which have two supply pipes 30 and one return pipe 31.
  • the humidified gas in gas circulation means 23 is forced, by blower 32 mounted in main leg 33, through humidity center 24, through distribution tee 34, and to manifolds 35.
  • the humidified gas is then conducted into supply pipes 30 and into the enclosure through perforations (not shown) in the surface of supply pipes 30.
  • Supply pipes 30 are preferably mounted above the package support means and the perforations are preferably in the bottom portion of the surface of the pipes.
  • Gas is returned from the enclosure to gas circulation means 23 through perforations 36 in the surface of return pipes 31.
  • Return pipes are preferably mounted under the package support means. That gas is drawn through main legs 33 and passed into humidity center 24.
  • the relative humidity of the gas is determined by the humidity measurement means 26 using, for example, wet bulb and dry bulb temperature readings.
  • An indication of the relative humidity of the gas is sent to control means 27 and, if the relative humidity is indicated to be less than a predetermined minimum, water from line 38 is conducted to moisture supply means 25 and is injected into main leg 33 to humidify the gas. In this way, the atmosphere in the creel enclosure is maintained at a high, predetermined, relative humidity. It has been found that an effective and preferred means for injecting moisture into main leg 33, is to use an ultrasonic mist generator as moisture supply means 25.
  • This invention is directed especially toward the use of para-aramid fibers, particularly poly(p-phenylene terephthalamide) (PPD-T).
  • PPD-T and fibers therefrom can be made in accordance with US-A-3,869,429.
  • Other fibers can, of course, be used in practice of this invention; and, in fact, this invention can be used for any fibers which must be fed to a process in a form which requires some controlled amount of moisture.
  • This invention is particularly useful in maintaining moisture on yarn prior to heat treatment.
  • One example of such a heat treatment is disclosed in above-mentioned EP-A-0 247 889.
  • yarn would be, customarily, supplied on packages to a creel having a MOY of about 35 ⁇ 5% water and it has been discovered that that MOY can be maintained if the relative humidity in the creel enclosure is controlled to about 90 to 99% at ambient temperature. Flow of the atmosphere through the creel enclosure is adjusted to maintain that humidity at that temperature.
  • the yarns be kept at a MOY higher than that at which complete consolidation of the polymer structure occurs. It is generally believed that the MOY should be maintained at greater than about 20%, based on dry weight of the yarn, for p-aramid yarns.
  • the atmosphere in the creel is, generally, air with water; but if desired or required for some particular purpose, the air could be replaced by some other gas such as nitrogen or argon or the like.
  • Feed yarns for the following examples were made in accordance with the procedures described in the above-mentioned European Patent Application.
  • the feed yarn identified, above, as Yarn #B was subjected to a heat treating process as described in the above-mentioned European Patent Application.
  • a warp composed of 48 ends of the yarn was heat treated in a 40 foot (12.2 meter) oven at 650°C, 135 yard per minute (123 m/min), and under a tension of 0.19 N/ta (2.2 grams per denier (gpd)).
  • the yarn residence time in the oven was about 6 seconds.
  • the oven was electrically heated and the yarns were heated primarily by radiant heat, and; only partially by convective heat.
  • the oven was continuously purged with nitrogen preheated to oven temperature.
  • the yarn leaving the oven was advanced by a set of water-cooled rolls on which the yarn temperature was reduced to about 25°C.
  • the yarns supplied for conduct of the heat treatment were positioned on the spindles of a creel of this invention and were maintained, before the heat treatment, in the humidified creel of this invention in an atmosphere of air at a relative humidity of 90 to 99%.
  • feed yarns from the same spinning run were heat treated as supplied from an unhumidified creel.
  • the yarns supplied from the unhumidified creel were non-uniform in color along the length, varying from dark gold to dark brown indicating variable decomposition and non-uniform yarn properties, while the yarns supplied from the humidified creel of this invention remained uniformly dark gold in color.
  • a major benefit provided by the present invention resides in the decreased yarn breakage which occurs during the subsequent yarn treatment when this invention is used on the feed yarns.
  • the packages of never-dried yarns may be mounted on the creel for 6 or as long as 8 hours until completion of the treatment. During that time, there is serious loss of moisture and increase in yarn breakage without the benefit of this invention.
  • Counts of remaining, unbroken, yarns (ends) were made for several runs (at least ten runs in all cases) of the creel set-ups of 48 yarns; both, with the humidified creel of this invention, and with the unhumidified creel. Results of those counts are presented in Table 2, below.
  • the feed yarns were supplied to both set-ups with an initial MOY of 35%.
  • Each of the runs continued for about six hours and, at the end of six hours, the creel set-ups without the enclosure, had yarns with a MOY of only about 20%.
  • the MOY for yarns in the humidified creel of this invention maintained their initial MOY of 35% throughout the runs.
  • the other feed yarns (identified as Yarn #A and C, above) were, also, heat treated in the oven of Example 1, above.
  • the treatment temperature and the treatment tension were maintained the same as in Example 1; but the heating time was modified in accordance with the different yarn deniers.
  • Yarn #A was heated for about 3.6 seconds and Yarn #C was heated for about 6.7 seconds.
  • Yarn #B was, as treated from Example 1.

Claims (3)

  1. Verfahren zum Aufrechterhalten eines geregelten Feuchtigkeitsgehalts an noch nie getrocknetem Garn (21) vor dem weiteren Verarbeiten, umfassend das Abwickeln des noch nie getrockneten Garns (21) von einem Garnkörper (18),
    gekennzeichnet,
    durch Montieren des Garnkörpers (18) aus noch nie getrocknetem Garn innerhalb wenigstens eines Teilgehäuses (10),
    durch Aufrechterhalten der relativen Feuchtigkeit der Atmosphäre im Gehäuse (10) auf über ungefähr 90 % und
    durch Abziehen des Garns (21) aus dem Gehäuse (10) zur weiteren Verarbeitung.
  2. Verfahren zum Behandeln von noch nie getrockneten p-Aramidgarnen nach Anspruch 1, einschließlich des Abwickelns eines Garnkörpers (18) aus Vorläufergarn (21) mit einem Feuchtigkeitsgehalt von über ungefähr 20 % auf Trockengewichtsbasis des Garns und des Lieferns des Garns zur weiteren Verarbeitung,
    gekennzeichnet
    durch Abwickeln von Garn vom Garnkörper (18), während der Garnkörper (18) bei Abwickeln des Garns (21) und wenigstens ein Teil des abgewickelten Garns (21) einer Atmosphäre mit einer relativen Feuchtigkeit von wenigstens 90 % ausgesetzt werden.
  3. Verfahren nach Anspruch 1 oder 2, wobei das noch nie getrocknete Garn (21) aus Poly(p-phenylenterephthalamid) hergestellt wird.
EP89112353A 1988-07-06 1989-07-06 Befeuchtung von Spulengattern Expired - Lifetime EP0350025B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21565888A 1988-07-06 1988-07-06
US215658 1988-07-06

Publications (3)

Publication Number Publication Date
EP0350025A2 EP0350025A2 (de) 1990-01-10
EP0350025A3 EP0350025A3 (de) 1991-07-24
EP0350025B1 true EP0350025B1 (de) 1995-01-11

Family

ID=22803857

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89112353A Expired - Lifetime EP0350025B1 (de) 1988-07-06 1989-07-06 Befeuchtung von Spulengattern

Country Status (5)

Country Link
EP (1) EP0350025B1 (de)
JP (1) JPH0253929A (de)
KR (1) KR960008839B1 (de)
CA (1) CA1319502C (de)
DE (1) DE68920492T2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100443462B1 (ko) * 2002-02-28 2004-08-09 성광물산(주) 티셔츠의 에리 형태안정화 가공방법
CN107190402B (zh) * 2017-07-03 2018-10-12 苏州市晨彩纺织研发有限公司 一种纺织设备用线筒备用架

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2105088A (en) * 1936-07-23 1938-01-11 Lydon Timothy Apparatus for humidifying textile yarns
US2166548A (en) * 1936-10-28 1939-07-18 Textile Machine Works Textile machine yarn conditioner
JPS604290A (ja) * 1983-06-22 1985-01-10 株式会社東芝 回路基板の製造方法
US4523441A (en) * 1983-11-22 1985-06-18 Alan Shelton Limited Handling of textile yarn
US4883634A (en) * 1986-05-30 1989-11-28 E. I. Du Pont De Nemours And Company Process for manufacturing a high modulus poly-p-phenylene terephthalamide fiber

Also Published As

Publication number Publication date
KR960008839B1 (en) 1996-07-05
DE68920492D1 (de) 1995-02-23
DE68920492T2 (de) 1995-08-10
KR900001920A (ko) 1990-02-27
EP0350025A2 (de) 1990-01-10
EP0350025A3 (de) 1991-07-24
CA1319502C (en) 1993-06-29
JPH0253929A (ja) 1990-02-22

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