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
  • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
  • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber
  • Y10T428/2933—Coated or with bond, impregnation or core
  • Y10T428/2964—Artificial fiber or filament
  • Y10T428/2967—Synthetic resin or polymer
  • Y10T428/2969—Polyamide, polyimide or polyester

Definitions

• the present invention relates to PTT staple fibers [wherein PTT is poly (trimethylene terephthalate)] and a process for their production by a two-stage spinning and drawing process.
• Staple fibers from polyethylene terephthalate and melt spinning plants for their production are known (Fourne, Synthetic Fibers, Hanser Verlag [1995] pages 460-462). Due to the different crystallization behavior, these processes are not readily transferable to PTT.
• EP 0547 553 AI describes the production of monofilaments at 20 m / min spinning speed and a production speed of 100 m / min.
• EP 0754790 A2 describes the production of textile fila ducks from PTT, inter alia, by means of heating surfaces heated to high temperatures as stretching aids. Concrete embodiments are missing.
• WO 99/11845 AI describes fibers made from PTT, a birefringence of at least 0.030 being obtained. The specified characteristics show low elongations at break of ⁇ 90%, which do not allow a sufficiently high draw ratio for further processing into staple fibers and are therefore unsuitable.
• WO 99-27168 AI discloses a high-speed spin-draw process for the production of PTT filaments which are wound on yarn packages. High throughputs and cable runs for the production of staple fibers cannot be derived from this.
• CA 86: 122866 to JP 52-08124 A relates to the treatment of PTT multifilaments with heating devices, the drawing of 33% to be used being unsuitable for the staple fiber production.
• CA 86: 122865 for JP 52-08123 A describes the use of a desired high stretching of 300% in the manufacture of PTT fibers.
• the speed of rotation of 360 m / min practiced is so low that the economics of the process are put into question.
• CA 86: 122856 for JP52-05320 A describes the bracing of PTT, whereby the practiced stretching ratio does not relate to uneconomical tension speeds.
• the object of the present invention is to provide PTT staple fibers, which and the textiles and home textiles, in particular carpets, made from them should have a high degree of aesthetics and quality in use, as well as environmentally friendly dyeing properties, in comparison with conventional fibers.
• PTT here is a polyester with at least 90 mol%
• trimethylene terephthalate units Suitable co-monomers are isophthalic acid, 2,6-naphthalenedicarboxylic acid, ethylene glycol, diethylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol.
• Poly (trimethylene terephthalate) homopolymer is preferred, and particularly preferred is one with a small proportion of ether groups formed during the production process and derived from 1,3-propanediol.
• the intrinsic viscosity of the PTT staple fibers is in the range from 0.7 to 1.3 dl / g and particularly preferably 0.75 to 1.15 dl / g.
• Polycondensation reactor is removed from the PTT production or is obtained by melting PTT granules.
• the polymer melt can contain conventional additives, such as dyes, matting agents, stabilizers, antistatic agents, lubricants, branching agents, in a total amount of 0 to 5.0% by weight, or the additives can be added to the melt on its way to the spinnerets , Additives that have a noticeable effect on structural characteristics (e.g. elongation at break of the filament) are excluded.
• the production of PTT staple fibers preferably with a titer of 0.8 to 20 den, is carried out by a two-stage spinning and drawing process which comprises the following steps:
• T s T m + k (° C), where 7 k k ⁇ 63, preferably 23 ⁇ k ⁇ 41.
• This is carried out and distributed the melt to the spinning beam in double-jacket product lines, which are heated with liquid and / or vaporous heat transfer medium in the outer jacket of the lines in a temperature range from 234 to 290 ° C. Other types of heating are possible.
• the wall shear rates of the melt in the pipe system are 2 to 128 sec "1 , preferably 3.5 to 16 sec " 1 in the pipelines and 12 to 128 sec "1 in static mixing elements which are installed within certain pipe sections.
• the shear rate ⁇ is defined here by the shear rate in the empty pipe times the mixer factor m, the mixer factor being a characteristic parameter of the mixer type and being about 3.5-4 for Sulzer-SMXL types.
• the shear rate ⁇ in sec "1 is calculated in accordance with
• G delivery rate of the polymer (g / min)
• ⁇ nominal density of the polymer (g / cm 3 )
• the mean residence time of the melt in the product line until it enters the spinning beam is a maximum of 30 minutes, preferably a maximum of 25 minutes.
• the product line optionally contains at least one booster pump, at least one polymer filter, at least one polymer heat exchanger and at least one shut-off and distributor fitting.
• the PTT melt is fed in the spinning beam to at least one spinning pump, by means of the pressure built up by the pump and in a constant delivery rate set by the choice of the speed of the pump, is fed to at least one spinneret pack, pressed inside the spinneret pack by distribution devices, filter and shear media and through the Holes of the spinneret plate are spun out into melt threads.
• the nozzle holes can be round or in any other geometry.
• the spinneret pack can be inserted from below into the spinning beam and have a cylindrical geometry, the nozzle holes in the nozzle plate being distributed symmetrically over an annular surface.
• the nozzle plates have a hole density of 0.3 to 20 holes / cm 2 .
• the nozzle hole meter D becomes corresponding as a function of the nozzle hole throughput
• the residence time of the melt in the nozzle package is a maximum of 4 minutes.
• the spinning delay is selected between 1:30 and 1: 160 and is determined in a known manner from the ratio of take-off speed to spraying speed at the nozzle holes.
• the melt threads are cooled by means of turbulent-free cooling air flowing in perpendicular to the thread running direction at a temperature between 5 and 25 ° C., preferably 8 to 18 ° C.
• the average outflow speed of the cooling air from the rectifier is 0.5 to 2.0 m / sec.
• the blowing zone lengths are between 50 and 2000 mm, preferably 150 to 600 mm for cooling systems concentric to the yarn path (radial blowing) and 500 to 2000 mm for blowing shafts with cross-flow blowing, and particularly preferably 150 - 300 mm for fiber titer ⁇ 5 den / filament and 300 to 600 mm for 12 - 20 den / filament.
• the cooled filaments are prepared with an oil-water mixture. A quantity of water on the threads of between 12 and 30% by weight, preferably 18 to 25%, is set.
• the filaments of a spinning position are bundled together to form a fila.
• the filament bundles of the individual positions are then combined to form a spinning cable, preferably on the spinning wall.
• the spinning cable is drawn off at speeds in the range from 600 to 2000 m / min by means of a take-off unit, followed by the spinning cable being deposited in a can.
• the cans are put together to form a creel in a creel room tempered to 15 ° C. to 35 ° C., preferably 20 ° C. to 27 ° C., and fed to a fiber section.
• the spinning cable is withdrawn from the cans by means of an egg unit, after which at least one entire cable is formed from individual spinning cables by means of a reed.
• the entire cables are drawn in at least one drawing stage, optionally with the addition of a tempered 01-water mixture.
• a temperature range of 20 - 100 ° C should be maintained.
• thermofixation and relaxation take place in at least one stage.
• the stretching, heat setting and relaxation take place at speeds of 25 to 400 m / min.
• the outlet speed from the relaxation zone is preferably at least 90 m / min, particularly preferably 180 m / min for titers ⁇ 5 dtex.
• the cooling of the entire cable below the glass temperature is preferably carried out with an oil-water mixture or with pure water.
• the partial cables are then put together to form at least one cable and fed to a stuffer box crimping machine per cable.
• Post-leveling with an oil-water mixture and / or damping of the cable as a crimping aid is optional.
• the subsequent drying of the cable in at least one dryer stage takes place with residence times of 0.5 to 10 min at temperatures of 30 to 200 ° C, preferably 60 to 165 ° C. Cutting the cable (s) received onto a stack! lengths of preferably between 6 and 200 mm can follow.
• PTT staple fibers are obtained with a new combination of properties that are unprecedented in the case of staple fibers, which are as follows: high permanent elasticity and bulkiness of the fibers, a new combination of high viscosity in combination with those by the force-elongation diagram described mechanical characteristics, of module values and the thermal shrinkage stability, wherein the dyeing with disperse dyes is possible without the addition of carrier / dyeing aids, and the fiber has permanent stain-resistant properties.
• This combination of properties leads to a highly desirable aesthetics and quality of use compared to conventional fibers.
• the coloring properties result in a considerably better environmental compatibility of the post-processing process.
• the areas of application can be seen in textiles and hot textiles, especially carpets.
• Three SMXL mixers from Sulzer / Switzerland were installed in the product line, the shear rate in the mixers being 28 sec "1 with a polymer throughput of 2500 g / min.
• the line diameter was chosen so that the shear rate in the free line 7, 9 sec "1 was.
• the average residence time in the product line was about 3 minutes.
• the PTT melt was spun in a BN 100 spinning system from Lurgi Zimmer AG with a ring nozzle and radial cooling shaft.
• the hole density of the spinneret plate was 6.3 holes / cm 2 .
• the spinning beam temperature was 256 ° C., the total pressure loss of the melt until it emerged from the spinneret was 140 bar.
• Heat exchangers were not installed.
• the residence time in the nozzle pack was approximately 0.5 min.
• the melt threads emerging from the nozzle plate were cooled in a quantity of 1400 Nn / h and at a temperature of 8 ° C. by means of cooling air guided radially inwards from the outside.
• the solidified spun threads were placed at a distance of 850 mm from the underside of the nozzle plate on a ring oiler and a water-oil mixture was applied so that the amount of water on the spun threads was about 25% by weight and a very stable thread run resulted ,
• the spinning take-off speed was 900 m / min. After the stripping, the spinning threads were deposited in spinning cans in the form of spinning cables by means of a reel mill.
• the separate stretching of the spinning cable in a fiber section was carried out in two stages.
• the spinning cables were then heat-set with slight relaxation, cooled, crimped, dried and cut into staple fibers.
• the production speed in the fiber line corresponding to the speed of the roll mill at the outlet from the last stretching zone, was 100 m / min.
• Water / oil layers can deviate by up to ⁇ 5%.
• the staple fibers could be colored with disperse dyes such as Terasil Navy Blue GRL / C from Ciba / CH at 95 ° C without the addition of carrier / dye application aids.
• the intrinsic viscosities (I.V.) were determined on a solution of
• the titer and force-elongation properties of the fibers were determined with the device set, Vibrotex and Vibrodyn, from Lenzing / Austria.
• the clamping length was 20 mm, the preload weight depending on the titer 100 mg / dtex and the test speed 20 mm / min.
• the LASE values (load at specific elongation) could be taken directly from the evaluation device by entering the reference stretches.
• the hot air shrink was in the heating cabinet at one
• the fibers were characterized by excellent bulk and crimp recovery behavior.
• the method described can also be used to produce other titers, in particular finer titers such as microfilaments of up to 0.8 den and less.
• finer titers such as microfilaments of up to 0.8 den and less.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Artificial Filaments (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Polyesters Or Polycarbonates (AREA)

Applications Claiming Priority (3)

Publications (2)

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• 1999
  • 1999-07-22 DE DE19934551A patent/DE19934551A1/de not_active Withdrawn
• 2000
  • 2000-07-20 DE DE50005808T patent/DE50005808D1/de not_active Expired - Fee Related
  • 2000-07-20 AU AU68251/00A patent/AU6825100A/en not_active Abandoned
  • 2000-07-20 WO PCT/EP2000/006923 patent/WO2001007693A1/fr active IP Right Grant
  • 2000-07-20 MX MXPA01013327A patent/MXPA01013327A/es active IP Right Grant
  • 2000-07-20 EA EA200200099A patent/EA003017B1/ru not_active IP Right Cessation
  • 2000-07-20 EP EP00956217A patent/EP1208252B1/fr not_active Expired - Lifetime
  • 2000-07-20 US US10/031,467 patent/US6645621B1/en not_active Expired - Fee Related
  • 2000-07-20 ES ES00956217T patent/ES2218204T3/es not_active Expired - Lifetime
  • 2000-07-20 CN CNB008106274A patent/CN1187485C/zh not_active Expired - Fee Related
  • 2000-07-20 KR KR1020027000821A patent/KR100649850B1/ko not_active IP Right Cessation
  • 2000-07-20 CA CA002378747A patent/CA2378747A1/fr not_active Abandoned
  • 2000-07-20 AT AT00956217T patent/ATE262602T1/de not_active IP Right Cessation
  • 2000-07-20 JP JP2001512957A patent/JP2003505614A/ja active Pending
  • 2000-07-20 PL PL00357349A patent/PL357349A1/xx unknown

Non-Patent Citations (1)

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