Classifications

• • 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
  • D01D13/00—Complete machines for producing artificial threads
• • 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
  • D01D10/02—Heat treatment
• • 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
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/12—Stretch-spinning methods
  • D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
• • 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
  • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
  • D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters

Definitions

• the present invention relates a system for industrial polyester yarn production, in which the mechanical properties of the yarn (tenacity, modulus, dimensional stability) are improved with additive, in order to be used in industrial fabric production.
• Liquid Crystal Polymers which can be used as reinforcing phase in different polymeric materials, are high performance resins with a unique structure comprising long, hard, rod like high oriented molecules. Rod-like molecules orient themselves in the flow direction during injection or extrusion molding.
• LCP The parts molded in LCP exhibit very high dimensional stability even if they are heated up to 2()0-250°C. Melting temperature of some LCP classes can reach up to 300°C. LCP can generally be used as an additive in many fields depending on its properties. Electronic and electrical components, fuel and gas barrier structures and sensors can be given as example for these fields.
• the objective of the present invention is to provide a system for liquid crystal polymer added industrial polyester yarn production. Another objective of the present invention is to provide a system for industrial yarn production wherein polyethylene naphthalate is used as polymer. A further objective of the present invention is to provide a system for industrial yarn production with improved tensile strength and elastic modulus.
• Figure 1 is the schematic view of the inventive system for yarn production.
• the components shown in Figure 1 are each given with reference numerals as follows:
• the inventive system for composite polyethylene naphthalate industrial yarn production system (1) essentially comprises
• At least one cooling unit (6) wherein the material coming from the extruder (5) is cooled
• At least one winding unit (9) wherein the material is drawn via the rollers (7) by cooling and heating is wound as yarn.
• the raw mixture forming unit (1) present in the inventive system (1) comprises at least one raw particle loading unit (21 ) wherein polyethylene naphthalate (PEN) and liquid crystal polymer (LCP) are mixed, at least one raw molten extruder (22) wherein the raw molten mixture is extruded. at least one raw molten cooling unit (23) wherein the material going out of the raw molten extruder (22) is cooled.
• PEN polyethylene naphthalate
• LCP liquid crystal polymer
• PEN:LCP ratio of the mixture prepared in the raw particle loading unit (21 ) is 60:40 by weight.
• the raw material which is prepared in this ratio and solidified in cooling unit (23) melted and blended in the twin screw extruder (22) is become as particles.
• Primary mixture forming unit (3) comprises
• At least one primary molten cooling unit (33) wherein the material going out of the main molten extruder (32) is cooled.
• the raw mixture particles prepared in raw mixture forming unit (2) are sent to the primary molten forming unit (3). and the polymer particles diluted with pure PEN are produced here.
• the PEN:LCP raw mixture is mixed with PEN till the LCP ratio becomes 1 -3% by weight in the particle loading and diluting unit (31 ). At the said process is preferably carried out at 260-300°C.
• the molecular weight of the blended polymer particles that are obtained are increased at the outlet of the primary mixture forming unit (3), and their internal viscosity (IV) is increased above 1 dL/g at 240-250°C with solid state polymerization, which takes 12-24 hours.
• IV internal viscosity
• the purpose here is to increase molecular weight to obtain a polymer suitable for yarn drawing by decreasing the degradation and chain movement during extrusion. %Crystallinity increase is above 100% with solid state polymerization.
• the particles obtained at primary mixture forming unit (3) with increased IV via solid state polymerization are dried in vacuum furnace for at least 24 hours at 120-140°C and loaded to the primary particle loading unit (4) under nitrogen atmosphere at 120 °C.
• the humidity value of the blended and solid state polymerized particles should be under 60 ppm before loading to the extruder (32).
• the primary polymer mixture coming out of the primary mixture forming unit (3) is transferred to the primary particle loading unit (4), and dried here at 100-120 °C and sent to the extruder (5) which is heated to 290-320 °C.
• PEN-LCP polymer mixture comprising 1-3% LCP by weight is become filaments via spinneret at the exit of the extruder (5).
• the length/diameter ratio of the spinneret used at the extruder exit (5) is 2-5, the hole diameter is 1mm.
• the jet velocity of the material from the extruder (5) is 6-7 m/min, the residence time of the material in the extruder is 11 -12 minutes.
• the throughput here is adjusted as 6-7 g/min.
• the PEN-LCP filament coming out of the extruder (5) is transferred to the cooling unit (6) preferably treated with cooling water.
• the length of the cooling unit is 70cm and its temperature is 80-95°C.
• the distance between the extruder (5) and the cooling unit (6) is adjusted as maximum 10cm.
• the yarn coming out of the cooling unit (6) first comes to the primary roller (71) and it is sent to the secondary roller (72) from here.
• the temperature of the primary roller (71) is between 100-140°C
• the temperature of the secondary roller (72) is between 140-160°C. Cold drawing process is applied on the yarn between these rollers (7).
• the yarn coming out of the secondary roller (72) is transferred to the first hot chamber (81 ) and heated with hot air to 200-250°C here and then transferred to the tertiary roller (73).
• the temperature of the tertiary roller (73) may vary between 200-250°C. Therefore, hot drawing is performed between the secondary roller (72) and the tertiary roller (73).
• the yarn coming out of the tertiary roller (73) enters into the second hot chamber (82) at temperature of 120 ⁇ 180°C. It comes to the quaternary roller (74) which is the last roller without heating, at room temperature; here it is relaxed in ratio of 1- 2% and sent to the winding unit (9) in order to be wound.
• the ratio of the primary roller (71 ) speed to the extruder (5) exiting speed is between4-6.
• the ratio of the tertiary roller (73) speed to the primary roller (71) speed may vary between 5-6,5.
• the conversion ratio is in range of 80-90% when the monofilament yarn which is produced with the inventive system is twisted as 2 layers with 50 twists.

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

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

Family

ID=53200279

Family Applications (1)

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Citations (3)

Family Cites Families (28)

• 2015
  • 2015-03-25 US US15/301,414 patent/US20170114477A1/en not_active Abandoned
  • 2015-03-25 CN CN201580029205.5A patent/CN106574402B/zh not_active Expired - Fee Related
  • 2015-03-25 EP EP15724103.5A patent/EP3126552B1/en not_active Not-in-force
  • 2015-03-25 RU RU2016142684A patent/RU2647386C1/ru not_active IP Right Cessation
  • 2015-03-25 BR BR112016023020A patent/BR112016023020A2/pt not_active Application Discontinuation
  • 2015-03-25 LU LU92889A patent/LU92889B1/xx active
  • 2015-03-25 KR KR1020167030485A patent/KR20160137641A/ko unknown
  • 2015-03-25 WO PCT/TR2015/000117 patent/WO2015152844A1/en active Application Filing

Patent Citations (3)

Non-Patent Citations (1)

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