WO1991008330A1 - Multifilament crepe et procede de production d'un tel filament - Google Patents

Multifilament crepe et procede de production d'un tel filament Download PDF

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Publication number
WO1991008330A1
WO1991008330A1 PCT/JP1990/001549 JP9001549W WO9108330A1 WO 1991008330 A1 WO1991008330 A1 WO 1991008330A1 JP 9001549 W JP9001549 W JP 9001549W WO 9108330 A1 WO9108330 A1 WO 9108330A1
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WO
WIPO (PCT)
Prior art keywords
crimped
birefringence
multifilament
fiber
crimped multifilament
Prior art date
Application number
PCT/JP1990/001549
Other languages
English (en)
Japanese (ja)
Inventor
Tadashi Koyanagi
Hironori Hamada
Umio Endoh
Teruhiko Matsuo
Original Assignee
Asahi Kasei Kogyo Kabushiki Kaisha
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 Asahi Kasei Kogyo Kabushiki Kaisha filed Critical Asahi Kasei Kogyo Kabushiki Kaisha
Priority to KR1019910700788A priority Critical patent/KR930003939B1/ko
Priority to EP90917689A priority patent/EP0455831B1/fr
Priority to DE69031383T priority patent/DE69031383T2/de
Publication of WO1991008330A1 publication Critical patent/WO1991008330A1/fr
Priority to SU915001461A priority patent/RU2042755C1/ru

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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
    • 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
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • D01D5/23—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool by asymmetrical cooling of filaments, threads, or the like, leaving the spinnerettes
    • 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
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/004—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by heating fibres, filaments, yarns or threads so as to create a temperature gradient across their diameter, thereby imparting them latent asymmetrical shrinkage properties

Definitions

  • the present invention relates to a crimped multifilament having a random form of crimp (hereinafter referred to as a random crimp) and a method for producing the same.
  • the crimped multifilament in the present invention includes a tow used for producing a stable fiber.
  • the present invention relates to a random crimped filament that can be used for a method and a production method for providing the same at low cost.
  • a crimped filament obtained by crimping a thermoplastic polymer fiber by a mechanical processing method such as false twisting or indentation is converted into a multifilament or spun yarn. Widely used.
  • the multifilament obtained in the publication has a structure in which the constituent single fibers have a difference in birefringence in the cross section between the outer layer and the inner layer, and have a distribution eccentric from the center of the fiber axis of the single fiber.
  • USP 4,038,357, USP 4,301,102 and JP-A-62-23816 disclose that an aqueous liquid is applied to a multifilament before solidification in a spinning process. A method of Spin Texturizing to obtain a crimped yarn is shown.
  • Japanese Patent Application Laid-Open No. 62-23816 relates to polyester, which is a method of cooling the vicinity of a point at which the discharge filament has been thinned at a spinning speed of ⁇ , ⁇ minutes or more with a liquid. How the publication also because of the high speed spinning peculiar significantly crystals are One Do and growth structure and, therefore c spiral crimp is made to that manifested, even strainer facilities the subsequent heat treatment, La No crimp can be applied.
  • the production of known crimped multifilaments based on high-speed spinning at a spinning speed of about 4,000 m / min or more is all helical crimping with low bulkiness and low rebound.
  • a crimped multi-filament having a random shape sufficient for practical use is obtained even if crimping such as fluid jetting is hindered by excessive growth of crystals.
  • the crimps can be easily extended in the tufting process. Insufficient coverage of the pet.
  • a first object of the present invention is to provide a crimped thermoplastic synthetic fiber multi-layer having a random crimp having a firm crimp.
  • a second object of the present invention is to provide a polyamide crimped multifilament having a random crimp having a firm crimp and having surface smoothness.
  • a third object of the present invention is to provide a ballistic crimped multifilament provided with a random crimp having a robust crimp.
  • a fourth object of the present invention is to provide a polyester stable fiber having a random crimp having a strong crimp.
  • a fifth object of the present invention is to provide a method for producing a multilayer crimped multifilament having a random crimp having a firm crimp and having surface smoothness. is there.
  • a sixth object of the present invention is to provide a method for producing a polyester crimped filament having a robust crimp.
  • the inventors of the present invention have conducted intensive studies to solve the above-mentioned problems.
  • the filament spun at high speed under special cooling conditions suppresses the growth of crystals by itself.
  • Heat treatment It has been found that a highly grown crystal structure equivalent to that of a normal high-speed spinning filament of 4,000 m / min or more can be developed.
  • the obtained random crimped filament has a surface smoothness, a highly grown crystal structure unique to high-speed spinning filaments, and a unique birefringence distribution. Because of this, they have found that they have excellent crimp fastness, and have completed the present invention.
  • the first object of the present invention is that the outer layer portion has a larger birefringence than the birefringence measured at the center of the monofilament constituting the thermoplastic polymer. This is achieved by a crimped multifilament having a distribution where the position showing the minimum birefringence is eccentric from the center of the fiber axis and having a random crimp of 10 kenoin or more. .
  • a second object of the present invention is that the birefringence of the outer layer portion is larger than the birefringence index measured at the center of the monofilament constituting the boriamid, and the minimum is The position showing the birefringence has a distribution in which it is eccentric from the center of the fiber axis, the crystal growth degree determined by wide-angle X-ray diffraction is 0.2 or more, and the This is achieved by a boriamid crimped multifilament having a random crimp.
  • a third object of the present invention is to provide a method comprising: Distribution where the birefringence of the outer layer is larger than the refractive index measured at the center of the single fiber, and the position where the minimum birefringence is present is eccentric from the center of the fiber.
  • the degree of crystal growth obtained by wide-angle X-ray diffraction is 0.4 or more, and is achieved by a polyester crimped multifilament having a random crimp of 10 or more / in.
  • the fourth object of the present invention is that the birefringence of the outer layer portion is larger than the birefringence index measured at the center of the monofilament, which is composed of polyester, and has a minimum value.
  • the position showing the birefringence has a distribution in which it is eccentric from the center of the fiber axis, and the degree of crystal growth determined by wide-angle X-ray diffraction is 0 or more, and 10 or more Achieved by polyester stable fiber with random crimp.
  • a fifth object of the present invention is to produce a random crimped multifilament by melt-spinning a polyamide, a single fiber constituting a multifilament extruded from a spout. Apply an aqueous liquid from one side and cool asymmetrically until the temperature is reduced to 100 ° C, take it at 4000 m / min or more, stretch it by 1.0 to 1.5 times, This is achieved by a method for manufacturing a crimped multifilament, which is characterized by performing liquid jet processing at a temperature of 150 or more.
  • a sixth object of the present invention is to produce a random crimped multifilament by melt-spinning a polyester, and to determine the temperature of a single fiber constituting the multifilament extruded from a spout. Apply an aqueous liquid from one side until the A symmetrically cooled, crimped multifilament characterized by drawing at a rate of 5000 m / min or more, stretching at 1.0 to 1.5 times, and then performing a relaxation heat treatment at a temperature of 150 ° C or more This is achieved by the manufacturing method described above.
  • FIG. 1A is a photograph showing random crimping of the crimped multifilament of the present invention.
  • FIG. 1B is a diagram schematically showing a random crimp
  • FIG. 2 is a diagram schematically showing a lacy-like crimp.
  • FIG. 3 is a pattern diagram of a transmission quantitative interference microscope photograph showing various modes of a birefringence distribution of a fiber.
  • FIG. 4A is a photograph of a cross section of a dyed single fiber of the present invention
  • FIG. 4B is a photograph of a cross section of a dyed single arrowhead of a conventional crimped filament.
  • FIG. 5A and 5B are electron micrographs showing the smoothness of a single arrowhead fiber surface
  • FIG. 5A is a photograph of a crimped filament according to the present invention
  • FIG. This is a photograph of a conventional crimped filament.
  • 6 and 7 are schematic front views each showing an example of a spinning machine and a processing machine for implementing the present invention.
  • FIGS. 8-9 and FIGS. 9B and 9B are schematic front views each showing an example of a water application device used for asymmetric cooling according to the present invention.
  • FIG. 10 and 11 show examples of X-ray diffraction intensity curves in the crystal growth measurement of the crimped multifilament of the present invention, respectively.
  • FIG. 10 and 11 show examples of X-ray diffraction intensity curves in the crystal growth measurement of the crimped multifilament of the present invention, respectively.
  • FIG. 12 is a view showing a crimp expression rate of a crimped multifilament.
  • a fundamental feature of the crimped multifilament of the present invention is that the constituent single fibers have a random crimp.
  • the term “random crimp” as used in the present invention refers to a crimp that is three-dimensional, non-rotating, and has irregular crimps. It is clearly distinguished from swirling crimps by false twisting and helical crimps obtained by composite spinning or mechanical scraping.
  • FIG. 1A shows a photograph of the random crimp of the present invention.
  • FIG. 1B is a schematic diagram of FIG. 1A.
  • FIG. 2 schematically shows a spiral crimp not according to the present invention in comparison with FIG. 1B.
  • a random configuration is a requirement to have sufficient resilience to tensile or compressive loads.
  • the crimps in the form of Lasine are inferior in compressibility and have poor stiffness, which is not suitable.
  • the number of crimps is required to be 10 / in or more. If it is less than this, the compressibility cannot be satisfied for applications such as carpet.
  • the crimp elongation ratio is required to be about 10% or more together with the number of crimps.
  • the number of crimps is Is 10 or more / in, the crimp elongation becomes about 10% or more, and the above requirements are satisfied.
  • the preferred number of crimps is 15 kenoin or more, and the crimp elongation is preferably about 20% to 50%.
  • the birefringence of the outer layer is larger than the birefringence measured at the center of the constituting single fiber, and the birefringence is the minimum. It has a unique birefringence index distribution in which the position indicating the index exists eccentrically from the center of the fiber axis.
  • the distribution of birefringence and the eccentricity are observed by a method described later using a transmission interference microscope when the cross section of the single fiber is circular.
  • the birefringence distribution is measured from U-shaped or V-shaped interference fringes as shown in Figs. 3A and 3B. If the birefringence distribution is eccentric from the center of the fiber, the lowest point LP (Lower Point) of the interference fringe as shown in Fig. 3C is the center axis of the filament (X-X ).
  • FIG. 4A is a photograph of a cross section of a single fiber of the present invention stained by a method described later. It can be seen that the dye penetration distance is largely eccentric with respect to the geometric center of the cross section.
  • FIG. 4B is a cross-sectional photograph of a dyed single fiber of a conventional crimped filament.
  • the definition of eccentricity when the cross-sectional shape of a single fiber is asymmetric and complicated is based on the geometric center of gravity of the cross-sectional shape. Action with crimped Maruchifui lame down bets consuming special birefringence distribution of the present invention are possible to exhibit superior robustness crimped 0
  • thermoplastic polymer referred to in the present invention includes polyamides such as Nylon 66, Nylon 6, Nylon 12, and Nylon 46, polyethylene terephthalate, polybutylene terephthalate, and the like.
  • polyamides such as Nylon 66, Nylon 6, Nylon 12, and Nylon 46
  • polyethylene terephthalate polyethylene terephthalate
  • polybutylene terephthalate polybutylene terephthalate
  • additives such as an antistatic agent, an anti-glare agent, and a flame retardant may be provided.
  • the present invention provides particularly excellent effects when applied to polyamide polyester.
  • the degree of crystal growth determined by wide-angle X-ray diffraction is 0.2 or more.
  • the crystal integrity coefficient is desirably 70% or more.
  • the crystal growth degree and the crystal perfection coefficient are measured by wide-angle X-ray diffraction according to the method described later.
  • the crystal growth degree is an index indicating the degree of crystal growth, and the closer to 1, it means that the crystal is growing. This value is 0.15 or less in the case where the polyamide is subjected to ordinary low-speed spinning-stretching, which indicates that the crimped multifilament force of the present invention has extremely grown crystals.
  • the preferred degree of crystal growth is 0.25 or more.
  • the crystal perfection coefficient is an index mainly indicating the size of the constituent crystals, and the closer to 100%, the higher the perfection. Since this value is 40 to 60% in the ordinary low-speed spinning-drawn polyamide multifilament, it can be seen that the crimped multifilament of the present invention has extremely high crystal integrity.
  • the crimped multifilament made of the polyimide of the present invention has no spherulites at all, and has good filament surface smoothness.
  • the smoothness of the filament surface can be easily observed with a normal electron microscope at a magnification of about 500 to about 2000.
  • FIG. 5 shows an electron micrograph of a nylon 66 crimped single fiber.
  • FIG. 5A is a crimped filament of the present invention, in which no spherulite is present.
  • FIG. 5B shows a conventional crimped filament, in which the presence of spherulites can be confirmed.
  • thermoplastic polymer is used for a polyester represented by polyethylene terephthalate or polybutylene terephthalate.
  • birefringence difference is 30 ⁇ 10 ⁇ 3 or more, more excellent crimps will appear.
  • the degree of crystal growth determined by wide-angle X-ray diffraction is 0.4 or more, the crimp fastness becomes excellent.
  • the degree of crystal growth of the polyester is a force measured by the method described below. The closer the value is to 1, the more the crystal grows. Since this value is 0.3 or less in the ordinary low-speed spinning and drawing of polyester, the crimped filament of the present invention is extremely bound. It can be seen that crystals are growing.
  • the preferred degree of crystal growth is 0.5 or more.
  • the crimped multifilament of the present invention As described above, the crimped multifilament of the present invention
  • the crimped multifilament of the present invention exhibits excellent bulkiness and crimp fastness based on such a structure.
  • Crimp fastness is indicated by the antagonism of the tensile stress applied to the fiber and the crimp restoring force under load.
  • B.F when B.F is used as a force piece by tufting, the crimped multifilaments are densely packed with each other, so that the amount of the cargo equivalent to about 0.2 mZg is obtained. I am being restrained.
  • B.F is handled in a form wound on a package, and is tufted while unwinding from this package in a tufting process. At this time, B.F. has creased in the package, and the crimp has been greatly reduced. Therefore, when the crimp restoring force is small, the crimp does not sufficiently recover due to the restraint after the tuft, and the performance of the force kit is significantly reduced.
  • the crimped multifilament (in this case, toe) of the present invention is cut into a stable fiber and subjected to a carding process, a good card without crimp extension is obtained. Has workability.
  • the cross-sectional shape of the crimped multifilament of the present invention is not limited to a circular shape, but also includes irregularly-shaped cross-section yarns such as trilobal and square, and hollow fibers.
  • the single yarn denier is not particularly limited as long as it is not more than about 50 denier.
  • confounding such as interlacing may be added to the crimped multi-filament as needed.
  • FIG. 6 shows an example of a spinning heat treatment apparatus for performing the production method of the present invention.
  • the filament 13 extruded from the spinneret 2 attached to the spin head 1 is cooled by the cooling chamber 4.
  • the aqueous liquid is applied from one side by the aqueous liquid applying device 5a (in this case, the constituent monofilaments are separated from each other), and asymmetric cooling is performed. Is done.
  • FIG. 6 is a schematic view in the case where a stretching device is added to the device of FIG. 5, and the filament 13 is stretched between the take-up roll 7 and the stretching port 7 ′.
  • FIGS. 8 and 9 are schematic views of an apparatus for performing water application according to the present invention
  • FIG. 8A is a plan view of a separation nozzle that separates single fibers from each other and applies an aqueous liquid.
  • FIG. 8B is a cross-sectional view taken along line EE ′ of FIG. 8A.
  • Fig. 9A is an example of a "roll type" in which the single fibers are applied in one plane while the single fibers are arranged in a plane, and Fig. 9B shows water from one side in a state where the single fibers are bundled.
  • FIG. 3 is a diagram of a “nozzle method” for applying a liquid.
  • the multifilament extruded from the spinneret is asymmetrically cooled by applying an aqueous liquid from one side in an area until the temperature of the constituent single fiber is cooled to 100 ° C. It is necessary to spin at a spinning speed of 4, OOO m Z minutes or more.
  • the spinning speed is less than 4,000 m / min, the difference in the birefringence ( ⁇ n) between the outer layer and the inner layer of the filament cross section, which is the object of the present invention, does not increase, and the spinning speed due to subsequent stretching etc.
  • the birefringence index difference ( ⁇ n) once generated disappears. Furthermore, in the filament after the heat treatment, the crystal growth is insufficient, and the robustness of the obtained crimped multifilament is insufficient.
  • the spinning speed of the present invention is from 5,000 m / min to 8,000 m / min.
  • the object of the present invention is effectively achieved. Even if the spinning speed is about 8,000 m / min or more, it is possible to obtain the multifilament of the present invention by applying an extremely large amount of aqueous liquid, etc. It is necessary to apply a large amount of aqueous liquid to adjust the growth degree, which causes problems such as scattering of the aqueous liquid.
  • the most preferred spinning speed is from 5,500 to 7,500 mZ, based on the mechanical properties and structure formation of the filament.
  • the present invention has a major feature in that asymmetric liquid is applied by applying an aqueous solution from one side before the temperature of the single fiber constituting the multifilament extruded from the spinneret is cooled to 100'C. Have.
  • asymmetric cooling with an aqueous liquid at a high temperature where the temperature of a single arrowhead is high, an eccentric birefringence distribution characteristic of the filament of the present invention is developed. If the filament temperature at the time of applying the aqueous liquid is less than 100'C, the object of the present invention will not be achieved no matter how the conditions such as the amount of applied water are selected.
  • the birefringence difference ( ⁇ n) increases as the value increases, but if it exceeds about 250'C, problems such as thread breakage during application of the aqueous liquid may occur. Therefore, the preferred filament temperature is between 250 and 100.
  • the polymer is extruded from the spinneret at 260'C to 320 • C.
  • the cooling of the filament until the application of the aqueous liquid is achieved by cooling with cooling air generally employed in melt spinning.
  • the position from the spinning surface where the filament temperature is 100 or more required to carry out the present invention differs depending on the spinning speed and the denier of the filament. If it is more than 4,000 m / min and 1 to 5 denier, which is usually used for clothing, it is within about 100 cm below the spout. Therefore, the application of the aqueous liquid of the present invention is performed during this time.
  • the temperature of the single fiber at the time of applying the aqueous liquid is 100 ° C. or higher. Most preferably, it is at least 130 • C.
  • spinning used for carpets uses about 10 to 30 denier for single fiber denier.
  • the application of the aqueous liquid is within about 300 ⁇ below the spinneret.
  • polyamide unlike polyester, in high-speed spinning without water, rapid thinning deformation of the yarn diameter is generally not observed during the spinning process.
  • clear thinning deformation was confirmed at the water application point. That is, applying an aqueous liquid to a single fiber at a high temperature imposes a thinning deformation point.
  • the present invention for the first time has revealed that it is expressed in a specific manner.
  • the effect of the application of the aqueous liquid makes it possible for the first time to increase the birefringence index difference 5 ( ⁇ n) and achieve an eccentric structure, which is the object of the present invention.
  • the application position of the aqueous liquid of the present invention is, based on this thinning deformation position (neck point), about 5 on or more above the deformation position, more preferably about 10 cm or more above. You.
  • a multifilament having a denier of 3 monofilaments is spun at a spinning speed of 6,000 m / min, and the thinning deformation position is 70 cm below the spinning surface (single fiber temperature is about 100'C).
  • the aqueous liquid is applied within 65 cm below the spinning surface (single fiber temperature of 150 ° C or more), preferably within 60 ⁇ (single fiber temperature of 200 • C or more).
  • the aqueous liquid used for cooling the filament in the present invention water, an ordinary oil agent for spinning, and the like can be applied.
  • water is used.
  • the temperature of the aqueous liquid is preferably as low as possible, but the present invention can be attained even if the temperature is not cooled to room temperature or lower.
  • the method for applying the aqueous liquid is a method in which the single fibers are separated from each other, a method in which the single fibers are arranged in a plane, or a method in which several to a dozen or more single fibers are bundled. The method is adopted.
  • the method in which the single fibers are separated from each other is preferably applied to spinning with a single fiber denier of about 10 denier or more in the medium.
  • this method is referred to as a “separated nozzle method”.
  • Figure 8A shows an example of the “separated nozzle method”.
  • the aqueous liquid is independently applied to each single fiber by the nozzle group 5a separated from each other.
  • FIG. 8B is a cross-sectional view taken along the line EE ′ of FIG. 8A to further clarify the state of application of the aqueous liquid to the single fiber.
  • the tip of the nozzle has a sharp pointed shape, which reduces the resistance due to contact with a single arrowhead, and is suitable for asymmetrically cooling a single fiber.
  • the method of flattening the single fibers is preferable when the polyester is applied to spinning with a single fiber denier of about 10 denier or less. No. This method is referred to as "roll method" in the present invention.
  • Figure 9A shows an example of the “roll method”. Even with the roll method, it is preferable that the resistance due to contact with the filament be small.
  • the roll diameter is selected from 10 to 50 mm.
  • a method of bundling several to several tens of single fibers is preferably applied to spinning of a single fiber denier of 1 to 5 deniers. This method is referred to as "nozzle method” in the present invention.
  • Figure 9B shows an example of the “nozzle method”.
  • a water dispenser of another shape can be employed.
  • the amount of the aqueous liquid applied to the filament is indicated by a weight percentage with respect to the filament.
  • the filament is asymmetrically cooled and the crystal growth is suppressed.
  • the object of the present invention is achieved when the applied water amount is about 10% by weight or more.
  • the water volume exceeds 500% by weight, it is necessary to prevent the excess aqueous solution from scattering.
  • the preferred amount of applied water is 20 to 300 weight percent.
  • the applied water amount is 20 to 50 weight percent.
  • the nozzle method multiple filaments are focused.
  • the filament temperature is as high as 100'C or higher, troubles such as breakage of yarns and yarn breakage easily occur.
  • the applied water amount is about 50% by weight.
  • the combination of the high-speed spinning of 4000 mZ or more and the application of the aqueous liquid from one side to a single fiber achieves the asymmetric cooling as the object of the present invention. That is, the asymmetric cooling by the aqueous liquid causes the single fiber to run at high speed in the contact between the aqueous liquid supplied from one side and the single arrowhead, thereby destroying the liquid film (surface tension) of the aqueous liquid. This is achieved by applying the aqueous liquid to only one side of the single fiber.
  • the spinning speed is less than 4,000 m / min, even if the aqueous liquid is applied from one side, the liquid film of the aqueous liquid will not break, and the aqueous liquid will be immersed so as to cover the entire circumference of the single fiber. Asymmetric cooling is difficult to achieve.
  • the spinning speed is about 4,000 mZ min. In the case of about 5,000 mZ, stretching up to 1.5 times or less improves mechanical properties Above.
  • the crimped filament When the spinning speed is about 5,000 m / min or more, the crimped filament has mechanical properties suitable for practical use without stretching. For the purpose of obtaining a simple process and high productivity, it is most preferable to spin at a spinning speed of about 5,000 mZ min or more and to make a crimped multifilament as it is undrawn.
  • the stretching is preferably performed by heating at a temperature equal to or higher than the glass transition temperature of the polymer.
  • the heat treatment requires at least about 150 and must be performed in a substantially relaxed manner.
  • the multifilament before the heat treatment has only low crystal growth, but is characterized in that the crystal grows large by such heat treatment. This is a surprising and unexpected change. The reason for this is not clear, but it is speculated that the high crystal growth specific to high-speed spinning is latent in the frozen state by the application of water, and this has been revealed by the high-temperature heat treatment.
  • FIG. 10 shows an example in which the polymer is nylon 66
  • (I) in FIG. 10 shows the wide-angle X-ray diffraction pattern of the filament before the heat treatment
  • (H) in FIG. ) Is a wide-angle X-ray diffraction pattern after heat treatment of this filament.
  • Figure 11 shows that the polymer This is an example of ethylene terephthalate.
  • (I) is a crimped multi-filament before heat treatment
  • ( ⁇ ) is a crimped multi-filament after heat treatment.
  • the broken line in (m) is a conventional low-speed spun-drawn yarn.
  • the heat treatment temperature is lower than about 150 ° C., the crystals cannot be sufficiently grown, and the random crimped multifilament excellent in robustness, which is the object of the present invention, cannot be obtained.
  • the heat treatment temperature is about 180 ° C or higher.
  • the heat treatment is carried out under a substantial relaxation, preferably under a relaxation of about 5% or more, to achieve the object of the present invention. If the operation is performed under substantially tension, a reduction in the number of crimps ⁇ a decrease in the birefringence.
  • Such a relaxation heat treatment apparatus is, for example, an injection processing apparatus using a fluid nozzle disclosed in JP-A-59-71440 or an injection processing apparatus using a net drum disclosed in JP-B-58-30423.
  • the method is appropriately selected from methods such as the above.
  • High-temperature air and saturated or unsaturated steam are generally used as the heating fluid for the blasting.
  • the injection processing method using fluid nozzle is adopted.
  • the fiber structure formed by asymmetric cooling And fluid Combination of blasting gives a random crimped multifilament with excellent robustness.
  • the fiber is deposited on a moving net, for example, without being necessarily sprayed, and heated. It is also possible to perform relaxation heat treatment through a zone.
  • polyester In the case of polyester, it is non-crimped before the relaxation heat treatment, but can be sufficiently crimped in a random shape by the relaxation heat treatment on the net as described above, not by injection processing. It becomes a multifilament. This is a surprising thing, and is a big difference compared to the fact that only a racinous crimped multifilament was obtained in JP-A-62-23816.
  • the discharge amount per hole at the time of spinning can be 7 to 25 g / min. Compared to the conventional discharge rate of 3-6 g per hole in this field, productivity is about 2-3 times higher than that of conventional products.
  • high-speed spinning-one heat treatment or high-speed spinning-drawing-heat treatment is continuously performed.
  • the most effective is high-speed spinning-crimping, in which heat treatment is performed in an undrawn state after high-speed spinning.
  • the single yarn temperature was measured in a non-contact manner along the spinning line using a scanning infrared thermometer.
  • the cross section of a single fiber When the cross section of a single fiber is circular, the distribution of birefringence and eccentricity are measured using a transmission quantitative interference microscope. If the cross section of a single arrowhead is irregular, the single fiber can be dyed and the distribution of birefringence and eccentricity can be observed using an optical microscope.
  • FIG. 3C is a schematic diagram showing the eccentric distribution of the birefringence of the crimped filament of the present invention.
  • the difference between the outer layer and the inner layer in the birefringent filament is calculated from Fig. 3A obtained by rotating the filament in Fig. 3C by 90 ° about the fiber axis XX. Minode was.
  • the outer layer indicates a position of 0.8 R when the radius R of the filament is from the filament center in FIG. 3A and is represented by An 0.8.
  • the inner layer indicates the minimum point L.P of the birefringence
  • Birefringence index difference ⁇ 5 ( ⁇ ) ⁇ . ⁇ 8 — ⁇ . It is.
  • Dyeing was performed under the following conditions in a state where the single fibers did not overlap each other during the dyeing.
  • Staining time 90 minutes An optical micrograph of the cross section of the dyed single fiber was taken. When the birefringence distribution and its eccentricity exist in the single fiber, the permeation distance of the dye from the surface of the single fiber is not uniform with respect to the center of the single fiber.
  • the X-ray generator operates at 30kV, 80mA.
  • scanning speed 4 No. chart speed 10 ⁇ Z, time constant 1 second, collimator 2 mm, receiving slit vertical width 1.9 ⁇ , width 3.5 mm.
  • the polyamide is polyhexamethylene dipamide, it generally has two major reflections on the equator, as shown in FIG.
  • the crystallinity (IWR) of the polyamide is given by the following equation.
  • nz + H 3 Is H, and in here is the minimum value of the intensity between the ⁇ (010) ten (110) ⁇ plane reflection (100) surface reflection, the maximum strength of the the H 2 (100) plane reflection, H 3 Is the maximum intensity of the ⁇ (010) + (110) ⁇ surface reflection.
  • the degree of crystal growth is defined as the growth of r-type crystals.
  • Polycaproamide generally takes two crystal forms, ⁇ -type and r-type. It has three major reflections on the equator. These are reflections from the (200) plane of the ⁇ -type crystal, the (020) plane of the r-type crystal, and the ⁇ (202) + (002) ⁇ plane of the ⁇ -type crystal from the low angle side.
  • Polyesters generally have three major reflections on the equator, as shown in Figure 11.
  • the Eori intensity at a point corresponding to the valley between (010) and (lio) H, and, when a diffraction intensity of beak of the H 2 (110), crystal Growth (IWR) is given by
  • the maximum intensity of surface reflection, H 3 is the maximum intensity of ⁇ (010) + (110) ⁇ surface reflection.
  • the crystal perfection (CPI) is measured using the X-ray diffraction intensity curve obtained from the ACS measurement method.
  • the method used to determine ASC is based on, for example, the formula of X-ray drawing of macromolecules by LE Alexander, published by Kagaku Dojin, Chapter 7, Scherrer's equation.
  • B is the measured line width
  • b is the broadening constant
  • the number of crimps was measured according to JIS L 1015 using a photograph as shown in FIG. 1A.
  • crimped filament When a crimped filament is left under a high tension for a long period of time while being wound around a package, the apparent number of crimps and crimp elongation may decrease. Is not shown. Therefore, in the present invention, these crimps are measured using 98 crimped filaments.
  • the number of crimps per inch was measured while a load of 2 Zd was applied to the conditioned crimped filament.
  • the measurement was performed with 10 points for each sample, taking into account the sample variation. The measurement was performed and the average value was shown.
  • the skein obtained is heat-treated with boiling water at 98'C for 5 minutes under no load, and then left in a room at constant temperature and humidity (temperature 20 ⁇ 2, relative temperature 65 ⁇ 2%) for 24 hours.
  • a 2 d load is applied to the conditioned fiber, and after 1 minute, the length is measured.
  • a load of 0.1 g / d was applied to the small skein, and the skein length was measured after 1 minute, and the skein length was £ 2 .
  • the crimp elongation is expressed by the following equation.
  • Crimp elongation X100 ()
  • the measurement was performed at 10 points for each sample in consideration of the variation of the sample, and the average value was shown.
  • the anisotropy of a single fiber cross section with a single opening was determined by the following formula, and the diameter of the circle inscribed in the concave portion of the single curtain section was defined as a, and the diameter of the circle circumscribed in the convex portion was defined as b.
  • the performance evaluation of the carpet was evaluated by visual inspection and touch by a skilled person, and measured by the Rug Inspection Association (Foundation) based on JIS L 1021.
  • the spigot is a rectangular spigot with a length of 0.70nra, a side width of 0.70nra, a slit width of 0.15, and a trilobal hole drilled equally into three holes, with a spinning hole of 68 holes, at a spinning temperature of 300'C and per hole.
  • the extruded material was extruded at a discharge rate of 9.8 g / min and holes, and was spun and taken off at a speed of 6,000 m / min at 1000 denier.
  • a 20-cm-long non-heated heat-insulating cylinder sealed with the spout surface was provided. It was cooled with a cold air of 0.3 msec from the cold air chamber.
  • the asymmetric cooling is performed by applying water from one side of the filament using a separation nozzle J from the direction facing the chamber cooling air blowing direction.
  • the amount of water applied at this time was about 30 weight percent relative to the filament, then, after refueling with a refueling nozzle, without stretching, at a peripheral speed of 6,000 mZ and temperature.
  • the crimped filament was wound into a cheese-like package at 5,100 m / min.
  • the relaxation rate at this time was about 15%.
  • Table 1 shows the properties of the crimped multifilament having a random morphology obtained by changing the position of the water imparting roll from the spinning surface in this processing.
  • the No. 6 crimped multifilament carpet lacked product lineability due to disordered via row and low bulkiness.
  • No. 1 to No. 5 crimped multi-quilt cartridges all had piles aligned and good bulkiness.
  • the compression ratio is 41 to 42% for all No.1 to No.5, the compression elasticity is 90 to 91%, and the thickness reduction rate by dynamic load (10,000 times) is 14 to: 15% As a pet, it had sufficient performance.
  • No. 2 crimped multi-filament was compared with Japanese Patent Publication No. 58-30423.
  • the rate of crimping was measured.
  • FIG. 12 shows the rate of crimp development with respect to both applied loads.
  • curve I is the value of No. 2 in this example
  • curve II is a comparative example.
  • the crimped multifilament of the present invention has an extremely high crimp expression rate as compared with the conventional crimped multifilament.
  • This example was performed for the purpose of measuring the birefringence distribution in a single fiber of the crimped multifilament of Example 1.
  • a crimped multifilament was obtained in the same manner as in Example 1 except that nylon 66 having a re L of 2.6 was used as a hole having a hole diameter of 0.35 mm and spinning was performed at 295.
  • Table 2 shows the properties of the obtained crimped multifilament.
  • the discharge rate per hole at each spinning speed is 12.0 g Z / hole at 3000 m / min, 12.4 g / min at 4,000 min, 11.1 g / min at 5,000 m / hole, and 6000 m / min.
  • the hole was defined as 13.3 g hole for mZ, and 15.6 g hole for 7000 m.
  • a water application roll was installed 200 cm below the spinneret, and the spinning speed was varied from 3,000111 / min to 7,00 () mZ. In this spinning speed range, the filament temperature during water application was about 170 to about 180.
  • a jet-stuffer device shown in Fig. 6 without winding once, and crimped at a relaxation rate of 12% in the same manner as in Example 1. Processing was performed. In this example, the spinning speed was 3,000 mZ min.
  • the roll 7 in FIG. 6 was stretched 1.8 times and 1.4 times, respectively, with 150 rolls. 5,000m / min,
  • Stretching was not performed for 6,000 m and 7,000 mZ.
  • Table 3 shows the properties of the obtained crimped multifilament. Comparative Examples 6, 7 and 8 in Table 3 show crimped multifilaments obtained without performing asymmetric cooling with an aqueous liquid. In the table, No. 2 to No. 5 each had an eccentric birefringence index distribution.
  • the degree of irregularity of the cross section of each single fiber is 1.7 to I.8. It was a mouthful bar.
  • the crimped multifilament of the present invention obtained by applying water at a spinning take-off speed of 4,000 m / min or more has good crimp appearance and robustness.
  • the transparency was excellent.
  • This example was performed for the purpose of measuring the birefringence distribution in a single fiber of the crimped multifilament of Example 3.
  • Table 4 shows the properties of the obtained crimped multifilament. As is evident from Table 4, the crimped multifilament obtained by watering with Boren OOOmZ or more has good crimping and robustness. Also, there was no irregularity on the filament surface.
  • Nos. 1 and 6 7 are comparative examples
  • Nye B emissions 6 consisting essentially of poly force blower Mi de 2 (measured in 95% H 2 S0 4, 1 % solution), at a spinning temperature of 290'C, pore size 0.35 ⁇ , number hole It was extruded from a 68-hole spinneret, and the spinning was performed at a speed of ⁇ , ⁇ with a crimped multifilament of 1,000 denier.
  • spinning and take-off were performed from a 68-hole spinneret having a trilobal shape with three sides of a slit width of 0.15 ⁇ . The discharge amount per hole was 9.8 g / hole.
  • a heating cylinder with a length of 20 cni and an internal temperature of 200'C was installed below the spinneret, and cooled with a cold air of 0.3 msec from the cold air chamber.
  • Table 6 shows the properties of the obtained crimped multifilament. 6th eclectic
  • the multifilament coming out of the heating cylinder is cooled by a cooling air with a cooling air temperature of 20'C and a wind speed of 0.30 m / sec by a side-blowing type cooling air chamber, and then as shown in Fig. 9A.
  • Asymmetric cooling was achieved by applying room temperature water at 40 weight percent per yarn weight. water
  • the position of asymmetric cooling by the application was set at 50 ⁇ below the spinneret. As shown in Table 7, the yarn temperature at this position was about 180'C to 190 in this spinning speed range.
  • the multi-filament subjected to asymmetric cooling was wound at a spinning speed of 50 d / 24 f without applying the oil agent and at different spinning speeds as shown in Table 7.
  • the position below the spin point at the neck point in the spinning shown in Table 7 is a value measured without water application.
  • the measurement was carried out using a wire measuring instrument manufactured by ZIMMER Co., Ltd., 460 ⁇ / 2 type, and by visual observation, and the two agreed well.
  • these multifilaments were crimped without stretching using the equipment shown in FIG.
  • the processing conditions at this time were such that the rolls 7 and 7 'were both unheated and had a constant peripheral speed of 3,000 m.
  • the jetstat nozzle supplied heated compressed air at a temperature of 240'C and a pressure of 2 kg.
  • the distance between Roll 7 'and Roll 11 was adjusted so that the boiling water shrinkage of the crimped multifilament was about 1% or less.
  • Table 7 shows the IWR of the multifilament before crimping and the properties of the crimped multifilament.
  • the surface of the crimped multi-filament of the present example No unevenness was observed, and the surface was smooth.
  • polyester crimped multifilament of the present invention had good crimping and fastness based on the eccentricity of the birefringence.
  • Nos. 5 to 8 are the powers that do not apply water, ivy, Jtl ⁇ iJo
  • the present embodiment is an example in which a polyester crimped multifilament is cut into a step to form a spun yarn.
  • Example 1 a 250-hole rectangular spout was used in which 50 holes were arranged in series in a row with 6 holes between holes, and 5 rows were perforated at intervals of 6 mm. Below the spinneret, a heating cylinder with a length of 35 cm and a width of 15 ⁇ -25 cm was provided below the spinneret.
  • Example 7 No. 2 in Table 7 (spinning speed of 6,000 m / min) and No. 6 were spun in the same manner, and a non-crimped multifilament of 500 d / 250 f was used. I got
  • Example 7 When water was applied, a roll having a diameter of 3 cm and a length of 35 cm was used in the “roll method” in FIG. Next, the obtained non-crimped multifilament was heat-treated in the same manner as in Example 7 to obtain a crimped multifilament.
  • the crimped multi-filaments of each of them were cut by 80 bells to 110 mm, respectively, to make them stable fibers. These were supplied to a 60-inch roller-card machine and subjected to a card test.
  • This example corresponds to Example 7 and shows a case where the cross section of a single fiber is irregular.
  • a spinneret with 24 holes perforated in a trilobal with three sides equal length of 0.28 thigh and 0.06 mm slit width was used.
  • the spinning conditions were the same as in Example 7.
  • the measurement of the neck point during spinning was carried out by visual observation.
  • Table 8 shows the properties of the obtained polyester crimped multifilament.
  • the degree of irregularity of the single fibers was 1.8 to 1.9 in each case.
  • Example 7 The same spinning as in Example 7 was performed, asymmetric cooling was performed, and the spinning was performed at ⁇ , ⁇ without stretching after applying the oil agent.
  • asymmetric cooling was performed, and the spinning was performed at ⁇ , ⁇ without stretching after applying the oil agent.
  • Each of the multifilaments to which water was applied had an eccentric birefringence distribution and was non-crimped.
  • crimping was performed continuously without winding using the processing device shown in Fig. 6 to obtain a crimped multi-filament of 50 d 24 f.
  • the processing conditions used were jet staff nozzles, and the temperature was 250 ⁇ (: pressure 4 kg / c—constant.
  • the relaxation rate was about the shrinkage rate of the crimped multi-filament boiling water. It was adjusted to be 1% or less.
  • Table 9 shows the IWR of the multifilament before crimping and the properties of the crimped multifilament. Incidentally, both surface of Mekuchijimima Ruchifu I lame down bets in this embodiment irregularities not observed, was smooth 0
  • polyester crimped multifilament of the present invention had good crimping and fastness.
  • this polyester crimped multifilament had a feature that the initial modulus was small. This property, when knitted fabric, Demonstrated a flexible and bulky texture
  • Example 10 water application at a yarn temperature of 200'C
  • the same procedure as in Example 10 was carried out. A crimped multifilament was obtained.
  • Table 10 shows the properties of the obtained crimped multifilament.
  • the crimped multifilament of the present invention has transparency and bulkiness as a continuous filament, and has high robustness and high quality when used in fields such as carpet and brushed fabric. , Performance is exhibited. When used as a cut fiber, it can be mixed with other materials such as wool and cotton without any problems in card passing properties and spinning properties.
  • the production method of the present invention has high productivity and is industrially extremely high since the above-described crimped multifilament can be produced at high speed and easily without any trouble during spinning and crimping. It has value.

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

Abstract

L'invention se rapporte à un multifilament crêpé produit à partir de polymère thermoplastique, dans lequel la biréfringence mesurée sur une partie externe du monofilament constituant est supérieure à celle mesurée sur une partie centrale du monofilament, dans lequel la répartition de la biréfringence est conçue de sorte que la position de la plus petite biréfringence est éloignée du centre de l'axe des fibres, et dans lequel le nombre des crêpures aléatoires par unité de pouce est au moins égale à 10. Le degré de cristallogenèse, déterminé par diffractométrie aux rayons X à grand angle, est au moins égal à 0,2, dans le cas de l'utilisation de polyamide, et à au moins 0,4 dans le cas de l'utilisation de polyester. Un procédé préférable de production d'un tel multifilament crêpé consiste à refroidir des multifilaments extrudés à travers des filières (2) à une température donnée, en appliquant (5) un liquide aqueux sur une face de chacun des multifilaments, à les étirer (7') entre une et une fois et demie, et à les soumettre à un traitement par jets de liquide (dans le cas de l'utilisation de nylon) ou à un traitement thermique de relaxation à une température de 150 °C.
PCT/JP1990/001549 1989-11-30 1990-11-29 Multifilament crepe et procede de production d'un tel filament WO1991008330A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1019910700788A KR930003939B1 (ko) 1989-11-30 1990-11-29 권축 멀티 필라멘트 및 그의 제조방법
EP90917689A EP0455831B1 (fr) 1989-11-30 1990-11-29 Multifilament crepe et procede de production d'un tel filament
DE69031383T DE69031383T2 (de) 1989-11-30 1990-11-29 Gekräuseltes multifilament und verfahren zur herstellung eines solchen filaments
SU915001461A RU2042755C1 (ru) 1989-11-30 1991-07-29 Извитая многоволоконная пряжа, полиэфирное извитое штапельное волокно и способы их получения

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JP1/309009 1989-11-30
JP30900989 1989-11-30

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WO1991008330A1 true WO1991008330A1 (fr) 1991-06-13

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DE (1) DE69031383T2 (fr)
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5512832A (en) * 1978-07-05 1980-01-29 Toyobo Co Ltd Production of hollow crimped fiber
JPS55107511A (en) * 1979-02-09 1980-08-18 Jiro Shimizu High-speed spinning of polyethylene terephthalate having double cross-sectional structure
JPS5611762B2 (fr) * 1973-10-24 1981-03-17
JPS5727204B2 (fr) * 1973-12-14 1982-06-09
JPS59216918A (ja) * 1983-05-26 1984-12-07 Toyobo Co Ltd 捩れを有するポリエステル繊維
JPH0197209A (ja) * 1987-10-09 1989-04-14 Toray Ind Inc ポリエステル繊維

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1660652B2 (de) * 1966-04-06 1974-11-07 Toyo Boseki K.K., Osaka (Japan) Verfahren zur Herstellung dreidimensional gekräuselter Polyester-Hohlfäden
US4301102A (en) * 1979-07-16 1981-11-17 E. I. Du Pont De Nemours And Company Self-crimping polyamide fibers
JPS61194209A (ja) * 1985-02-20 1986-08-28 Toyobo Co Ltd 高強力ポリアミド繊維及びその製造法
IN167096B (fr) * 1985-04-04 1990-09-01 Akzo Nv
JPH02127534A (ja) * 1988-11-01 1990-05-16 Asahi Chem Ind Co Ltd ポリアミド捲縮糸

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5611762B2 (fr) * 1973-10-24 1981-03-17
JPS5727204B2 (fr) * 1973-12-14 1982-06-09
JPS5512832A (en) * 1978-07-05 1980-01-29 Toyobo Co Ltd Production of hollow crimped fiber
JPS55107511A (en) * 1979-02-09 1980-08-18 Jiro Shimizu High-speed spinning of polyethylene terephthalate having double cross-sectional structure
JPS59216918A (ja) * 1983-05-26 1984-12-07 Toyobo Co Ltd 捩れを有するポリエステル繊維
JPH0197209A (ja) * 1987-10-09 1989-04-14 Toray Ind Inc ポリエステル繊維

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0455831A4 *

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EP0455831A1 (fr) 1991-11-13
EP0455831B1 (fr) 1997-09-03
DE69031383T2 (de) 1998-02-19
EP0455831A4 (en) 1992-05-20
DE69031383D1 (de) 1997-10-09

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