WO1988002795A1 - Fibre de polyethylene haute densite reticulee, tissu non tisse fabrique avec cette fibre, et leur production - Google Patents

Fibre de polyethylene haute densite reticulee, tissu non tisse fabrique avec cette fibre, et leur production Download PDF

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Publication number
WO1988002795A1
WO1988002795A1 PCT/JP1987/000765 JP8700765W WO8802795A1 WO 1988002795 A1 WO1988002795 A1 WO 1988002795A1 JP 8700765 W JP8700765 W JP 8700765W WO 8802795 A1 WO8802795 A1 WO 8802795A1
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WIPO (PCT)
Prior art keywords
polymer
fiber
dimensional
solvent
pressure
Prior art date
Application number
PCT/JP1987/000765
Other languages
English (en)
Japanese (ja)
Inventor
Kohzoh Ito
Ikuo Ueno
Yoshiaki Nakayama
Katsuji Hikasa
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
Priority claimed from JP61241450A external-priority patent/JPH0772388B2/ja
Priority claimed from JP9523187A external-priority patent/JPS6350512A/ja
Priority claimed from JP62172960A external-priority patent/JPS6420366A/ja
Application filed by Asahi Kasei Kogyo Kabushiki Kaisha filed Critical Asahi Kasei Kogyo Kabushiki Kaisha
Priority to KR1019880700670A priority Critical patent/KR910005573B1/ko
Priority to DE3751793T priority patent/DE3751793T2/de
Priority to EP87906606A priority patent/EP0285670B1/fr
Publication of WO1988002795A1 publication Critical patent/WO1988002795A1/fr
Priority to US08/233,947 priority patent/US5607636A/en

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
    • 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
    • D01D5/11—Flash-spinning
    • 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
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins

Definitions

  • High density polystyrene network woven fabric nonwoven fabric made of the woven fabric, and method of manufacturing them.
  • the present invention relates to a novel three-dimensional reticulated fiber, a nonwoven fabric composed of three-dimensional reticulated fibers, and a method for producing the same, which can be used as a special material for various applications. More specifically, the present invention is made from high density polyethylene, has a highly fibrillated three-dimensional network morphology, has extremely high strength and very high thermomechanical properties.
  • a novel three-dimensional network fiber capable of suitably producing a nonwoven fabric having a mature adhesive property, a nonwoven fabric having excellent opacity, excellent covering power and high strength composed of the novel three-dimensional network fiber The present invention relates to a high-strength nonwoven fabric having an unfused portion, a nonwoven fabric having excellent uniformity, and a novel method for producing the nonwoven fabric having the excellent uniformity.
  • a New dimensional reticulated fiber A New dimensional reticulated fiber.
  • ⁇ _ A new method for producing three-dimensional network fibers using the melting zone melting polymer sealing method.
  • This Amibushi fiber has a characteristic net-like structure and a stable fibril, so it has the characteristic of high whiteness and high covering power by diffusely reflecting light, and it can be used for various purposes. Can be.
  • Non-woven sheets are a particularly important application, and various polymers are used as the polymer used as the mesh steel, but polyolefins, especially high-density polyethylene Much research has been done on the use of carbon fibers for flash spinning.
  • the principle of flash spinning is that the reticulation is caused by the structural change of the solution accompanying the transition from a high-temperature, high-pressure homogeneous solution to a low-pressure region, and the solidification of the flash and polymer of the solvent. It expresses structural fibers. Therefore, spinning from a homogeneous solution consisting of a polymer and a solvent is indispensable for continuously and stably producing Amibushi textile fabric.
  • the solvent used in the spinning method is capable of dissolving the polymer at high temperatures and high pressures, and those having a comparatively low boiling point having a flash property are selected. Does not have the ability to dissolve lima: dissolving the polymer only at high temperature and high pressure.
  • a polymer is heated in a pressure vessel having a stirrer.
  • the method is known as a batch method.
  • Various spinning processes are disclosed in US Pat. No. 3,227,794 as a method for obtaining textiles. That is, a predetermined amount of the molten polymer and the solvent are introduced into the screw mixer, and then the mixture is melted and spun in a dissolving tank having a stirring mechanism.
  • the slurry is fed into a melting tank with a baffle, melted and spun, or the slurry is melted and spun with a slurry pump and piping.
  • Conventionally known three-dimensional mesh fibers are steel fibers manufactured by such a method.
  • the boundary between one liquid phase and two liquid phases is limited in temperature and pressure, and it is of low temperature melting type and high pressure melting type. It is disclosed in the above-mentioned prior art that the change from one liquid phase to two liquid phases by descent and the necessity of extraction in two liquid phases are required.
  • conventionally known reticulated fibers are fibers produced by changing a polymer solution into a two-liquid phase region and then spinning.
  • Non-woven fabrics made using a three-dimensional meshed steel fiber formed from a network of fibrils, as disclosed in ⁇ F 3,081,519, have been known. .
  • Non-woven fabrics using a melted filament as a sheet are known.
  • fiber sheet before mature bonding Is referred to as a nonwoven web.
  • Flash spinning uses molten flash yuka. It is known that the spinning speed usually reaches 9,000 to 13,500 m / min at 4,900 m / min or more. It is extremely useful as a method for obtaining a nonwoven sheet with good productivity.
  • a nonwoven fabric in which the continuous spun net fabric as spun is spread and arranged in a random direction is formed as a nonwoven fabric (hereinafter, the nonwoven fabric obtained by joining the nonwoven fabrics is referred to as a nonwoven fabric). It is heat bonded according to the retention, strength development and other purposes.
  • the mature bonding is performed by bonding with a force renderer, by embossing or by a felt calender.
  • a nonwoven fabric with a paper-like surface with a flat surface and a nonwoven fabric with an embossed pattern Opacity due to the formation of fine fibrillar braided steel, covering power and degree, surface smoothness, i-fuzziness, or flexibility, and a certain level of It can be used for various purposes by utilizing the target strength.
  • the web is joined with an adhesive.
  • non-woven fabrics having various forms are known. That is, there are known a non-woven cloth which is softly raised, an ⁇ -like non-woven cloth, a lightly heat-bonded surface only, and a non-woven cloth which is not completely bonded at all. These nonwoven fabrics are used for various applications by utilizing their high covering power, whiteness, and strength. '
  • the polymer used for producing the nonwoven fabric of the mesh fiber various polymers are used, but a nonwoven fabric made of polyolefin, especially high-density polyethylene made of flash-spun iron fiber is used. Much research has been done to make this suitable.
  • the spinning speed in flash spinning is extremely high as described above, and the gap between the spinning speed and the drawing speed is too large. It has various problems and is not practical.
  • a flash spun textile is used as a sheet, it is necessary to carry out mature drawing of a three-dimensional network fiber. Is virtually impossible. That is, an operation for giving a difference between the spinning speed and the drawing speed cannot be included in the process.
  • the ripening operation can be used, the ripening can increase the mechanical strength of ripening, but the whiteness and S-force, which are the characteristics of the three-dimensional netted fabric, decrease, and the wrapping becomes transparent. Nature occurs.
  • the physical properties of the non-woven fabric obtained by devising a method of spreading fibers into a sheet or a method of thermally bonding the sheet are considered to be the mechanical, thermal, and optical properties of the constituent steel Sex Depends on S.
  • the destructive properties of the heat-bonded non-woven fabric depend on the mechanical properties and thermal properties of the fibers to be formed.
  • the optical properties of the non-woven fabric and the optical properties and thermal properties of the textile It depends on the nature. Therefore, a nonwoven fabric having excellent performance cannot be obtained.
  • Various known methods can be used as a method for heat-bonding a sheet made of textile obtained by flash spinning.
  • High-density polyethylene is bonded at a temperature close to the melting point of the crystal to develop strength and maintain shape as a nonwoven fabric and to prevent surface fuzz. Therefore, when considering a mature bonded nonwoven fabric, the thermal adhesion between fibers is strong. At the same time, it is required for the steel that the shrinkage does not easily occur during thermal bonding and that the mechanical strength of the textile is high at a high temperature near the bonding temperature.
  • one of the objects of the present invention is as-spun fabric, which has high mechanical strength and excellent three-dimensional properties near the bonding temperature suitable for forming a heat-bonded nonwoven fabric.
  • the purpose is to provide a mesh fiber.
  • polymer swollen using pie plies is mixed by laminar flow mixing.
  • dissolution only the shear force and the flow rate difference required for dissolution require an extremely long pipeline, which results in an increase in residence time.
  • turbulent mixing the polymer solution has a high viscosity of about 30: 100 centimeters, so that extremely high flow is required and a huge pump that is difficult to implement in practice is required. I need.
  • the solvent used for flash spinning must dissolve the polymer at normal and normal pressure, and must dissolve the polymer only at high pressure and high temperature.
  • high temperature and high pressure are indispensable. Therefore, the conventional known technology inevitably increases the Banning time, and conversely, the high pressure is limited. .
  • the cause of this situation is thought to be the affinity between the polymer and the solvent. That is, as described in the flash spinning method. SP 3: 22: 794, a high-temperature, high-pressure homogeneous solution was depressurized by a decompression orifice. This is a technology that utilizes the structural change of the solution and the flushing force of the solvent and the solidification of the solvent by ejecting it from the spinning nozzle, and thus the affinity between the polymer and the solvent. Has a very important meaning. From this, the solvent used for flash spinning is selected so as not to dissolve the polymer at normal temperature and normal pressure and to form a uniform solution with the polymer at high temperature and high pressure. Therefore, the polymer solvents used for flash spinning do not dissolve each other unless the temperature and pressure are high, and the dissolving power decreases as the degree of polymerization of the polymer increases. Is also clear.
  • Another major problem of the prior art is the mixing ⁇ dissolution tank and O stirring shaft. That is, according to the prior art, a uniform polymer solution is obtained by a stirring tank driven by an external driving source, or a long time is required by using a long pipe line. To obtain the desired polymer solution. For the latter, there is no forced mixing, so it is of practical value A substantially uniform solution of the polymer having a molecular weight as high as L2 cannot be obtained.
  • the former method using a stirring shaft is more practical, but since this method also includes a sliding part in the device used, it cannot be made to have a certain high pressure or more, and it is special and expensive. There is a problem such as the necessity of a sealing device for a suitable sliding part.
  • the polymer solvent system that performs flash spinning forms a solution at high temperature and pressure, and in order to impeach the affinity between the polymer and the solvent, the higher the pressure, the higher the dissolution speed even at the same temperature.
  • a uniform polymer solution can be obtained smoothly.
  • This is the same for the molecular weight of the polymer, which results in a high molecular weight and its dissolution requires high pressure.
  • the conventional method it is not possible to obtain a high pressure enough to dissolve the high molecular weight polymer due to the problem of the sealing mechanism of the sliding part. Spinning the quantity polymer was virtually impossible.
  • Line EF is the phase separation line (phase equilibrium line), from which it shows that the upper part is one liquid phase and the lower part is two liquid phases.
  • changing from one liquid phase region to two liquid phase region in the prior art means transition from the state of point C to the state of point D. That is, the pressure in the decompression chamber immediately before the discharge is limited.
  • the stretching and orientation of the textile is performed by the solvent, fluff, so that the higher the pressure, the higher the flash force.
  • the use of the flash yuka is restricted in the conventional technology, and further improvement is expected particularly in view of the strength of the mesh fabric.
  • the present invention provides a method for activating a solution in a flash spinning method using industrially useful high-density polyethylene 'and fluoro--11 to remove the solvent flusher.
  • the aim of this paper is to make further use of a fully stretched and oriented higher-strength, high-density polyethylene reticulated fiber, and a new method for obtaining the reticulated fiber.
  • F_ Non-woven fabrics using a flash-spun woven fiber having a three-dimensional network structure are used for various applications by utilizing the unique properties of the woven fiber fabric.
  • the nonwoven fabric of the aforementioned US P3:.. 169, as disclosed in 899 report the Tetsu ⁇ spun used - i.e., spread was Furatsushu spun O ⁇ with baffle ⁇ like sheet — A simple process of heat bonding is adopted.
  • a paper-like nonwoven fabric having a certain degree of opacity and covering power and mechanical strength of a three-dimensional meshed steel is disclosed in US Pat. No. 3,532,589.
  • this nonwoven fabric has a specific surface of 0.5 to 5.0 m / g in each of the layers arranged in the thickness direction of the sheet. It has a non-woven fabric structure composed of a three-dimensional net-like fiber having a specific surface area that is at least 0.3 m 2 ng higher than that of any of the outer layers.
  • a non-bonded fiber sheet has a large tear strength, but a low tensile strength, and has no fuzz on the surface. This is thermally bonded-this can increase the tensile strength and improve the surface fluff, but the tear strength decreases. This tendency becomes stronger as the degree of mature bonding increases.
  • opacity is also an important physical property.
  • increasing the degree of thermal bonding with the aim of increasing the tensile strength impairs this opacity.
  • a very strong, mature bond is a transparent filter. It will be nolem-like.
  • a mesh-like steel nonwoven fabric having a preferable relationship between tensile strength and tear strength and having excellent opacity.
  • the tensile strength and crack strength in a region with a large adhesion of 60 gZ ⁇ f or less are desired.
  • strength ⁇ is high, has been eagerly awaited is excellent nonwoven fabric opacity, hiding power, the present invention is one object that you provide such nonwoven c
  • Non-woven sheets of three-dimensional silky fiber are subjected to various types of heat bonding for the purpose of maintaining shape, developing strength, and reducing surface fuzz. Normally, these sheets have a multi-layer structure in which three-dimensional mesh fibers are spread and deposited, and each layer in the cross-sectional direction of the sheet can provide a bonding state between different fibers. .
  • the object of the present invention is to form a non-woven fabric as one of the non-woven fabrics.
  • a non-woven fabric having at least a part of the non-woven fabric having at least a part of a loose layer with a low degree of adhesion is formed. That is, the surface of the nonwoven fabric, or the inner layer when the nonwoven fabric is exfoliated in layers, includes a partially non-fused nonwoven fabric having an independent reticulated 'state' of iron.
  • Such a nonwoven fabric is a nonwoven fabric that is excellent in bulkiness, flexibility, covering power, and has high tear strength.
  • Example in such a nonwoven fabric, a sheet-like material of a three-dimensional network woven 'Wei high density polyethylene Wechiren, partially thermally adhered Ty V e k ® 14 type (E. I. Du pon t Is known.
  • This nonwoven fabric consists of a surface layer that is relatively firmly heat bonded and an inner layer that is relatively loosely bonded, and that is partially pressed. It has a pattern. When the non-woven fabric is separated as a layer, it is possible to obtain an independent continuous net of 20 TM or more from the inner layer which is relatively slowly bonded by heat.
  • nonwoven fabrics composed of reticulated fibers
  • these nonwoven fabrics have large irregularities in the opening width of the opened three-dimensional mesh fibers constituting the nonwoven fabric, and contain many bundled bundles having an extremely large fiber density.
  • the nonwoven fabric has a non-uniform appearance in which a portion having a high fiber density and a portion having a low fiber density are mixed, and the nonwoven fabric has one large spot.
  • nonwoven fabrics are unsuitable for use in filter fields and sanitary materials where uniformity of the nonwoven fabric is required. Pinholes were formed in small areas, and it was not possible to use them in fields requiring shielding properties such as liquids and batteries.
  • An object of the present invention is to provide a uniformly spun flash-spun nonwoven fabric and a method for producing the same, which can be sufficiently used in the field of filters, sanitary materials and the like. Orchid of invention
  • An object of the present invention is to provide a novel tertiary fiber of high-density polyethylene, which is useful, a variety of nonwoven fabrics made of the fiber, and a method for producing the same.
  • a three-dimensional morphology with extremely high maturation characteristics and extremely high strength J,
  • a steel extruder (J_) manufactured using a screw extruder which is manufactured by a manufacturing method in which the inlet of the ⁇ immersion region is sealed with a molten boiler,
  • Bollima a textile manufactured by a liquid-activating manufacturing method
  • the non-woven fabric (F) which has a high specific surface area and high mechanical strength of the inner layer produced from the fibers of the above (), Seventh, non-woven fabric (_G), which is manufactured from the fiber of (A) above and has excellent covering power and strength, from which independent m-fiber can be taken out,
  • the object of the present invention is to provide a manufacturing method (! _) For manufacturing the non-woven fabric having high uniformity (-H-) using a dispersing device having a special structure and a dispersing condition. .
  • a first object of the present invention is to provide a fibrillated, high-density, polystyrene-based three-dimensional reticulated fiber characterized by having a long-period scattering intensity ratio of 40 or less. Is achieved.
  • a second object of the present invention is to continuously supply the polymer to the polymer dissolving zone while melting it by using a heated screw extruder, and to continuously enter the dissolving zone into the inlet.
  • a solvent is added to the molten polymer while closing with the molten polymer supplied to the furnace, and the two are mixed and dissolved under high pressure to produce a polymer solution, which is used for the melting zone.
  • Three-dimensional network of fibrillated high-density polyethylene obtained by the method of manufacturing a mesh-like fiber by the flash spinning method, in which a polymer solution is continuously discharged from a wool into a low-pressure region. Achieved by weaving.
  • a third object of the present invention is to provide a high-pressure homogeneous solution comprising a high-density polyethylene-based polymer and trichlorofluoromethane from a reduced-pressure orifice, a reduced-pressure chamber and a spinning nozzle.
  • a spinning device made of Achieved by a fibrillated, high-density polyethylene-based three-dimensional mesh fiber obtained by a method of manufacturing a mesh fiber by a flash spinning method that activates and activates a liquid. Is done.
  • a matured screw extruder is used; A solvent is added to the molten polymer while the inlet of the melting area is closed with the molten polymer supplied continuously, and the two are mixed and dissolved under high pressure to produce a polymer solution.
  • a method for continuously producing high-density polyethylene-based three-dimensional reticulated fibers characterized by discharging the polymer solution from the nozzle used for the dissolution zone to the low-pressure zone in a continuous manner. Achieved.
  • the fifth aspect of the present invention is that a high-pressure homogeneous solution comprising a high-density polyethylene-based polymer and trichlorofluoromethane is applied to a reduced-pressure orifice, a reduced-pressure chamber, and a spinning nozzle.
  • a high-pressure difference is generated before and after the high-pressure orifice. This is achieved by a method for producing a high-density polyethylene-based three-dimensional network fiber, which is characterized by activating a liquid.
  • a high-density polyethylene-based fibrous continuous three-dimensional network fiber is deposited in a random direction and strongly heat-bonded to each other.
  • An integrated nonwoven fabric comprising a surface layer and an inner layer that is weaker than the surface layer and is thermally bonded to the film-like textile layer, characterized in that the specific surface area of the inner layer exceeds 5 nf / g. High tear strength three-dimensional nonwoven fabric Achieved by cloth.
  • a seventh object of the present invention is to provide a high-density polyethylenic fibrillated three-dimensional network fiber which is arranged in a random direction, deposited in layers, and partially unfused.
  • nonwoven fabrics containing a layer of fibrous fibers in an independent mesh form the
  • nonwoven fabric made of a three-dimensional net-like fabric, which has a long-period scattering intensity ratio of 40 or less.
  • An eighth object of the present invention is to provide a nonwoven fabric in which an opened high-density polyethylene-based three-dimensional reticulated iron is deposited in a random direction, a bundle portion present in continuous reticulated fibers constituting the nonwoven fabric.
  • the bundle has a density of less than 100 mm / MI width or a bundle with a density of 40 denier Z mm or more, the width is 5 mm or less; F and length are 3 Achieved by a uniform non-woven fabric that is characterized by the following bundle.
  • a ninth object of the present invention is to provide a rotatable disk portion, a cylindrical portion extending vertically from the center of the disk portion and having a circular outer surface with a smaller diameter than the disk portion, and one surface of the disk portion And a skirt portion that is inclined and disposed in a space between the cylindrical portion and the circular eclectic surface of the cylindrical portion.
  • the skirt portion comes into the skirt portion in a direction substantially parallel to the axis of the cylindrical portion.
  • a plurality of oscillating surfaces for oscillating the unopened three-dimensional net-like fiber, and the oscillating direction of the three-dimensional net fibers which are alternately arranged with the oscillating surface and are oscillated by the oscillating surface.
  • a three-dimensional mesh fabric composed of a cushioning surface that mitigates a rapid change in the size of the fabric.
  • the center of the oscillating surface and the upper surface of the disk The angle of inclination formed is almost equal to the angle of inclination between the center of the airplane and the upper surface of the disk, and the cushioning surface has a fan-shaped shape whose width near the disk is wider than that near the cylinder.
  • FIG. 1 is a view showing the principle for producing a high-performance, high-density polyethylene three-dimensional network key of the present invention.
  • a polymer liquid is activated by a high force difference. This is a draft explaining the spinning method and the relationship between pressure and temperature in the conventional spinning method.
  • FIG. 2 is a diagram showing a small-angle X-ray scattering image of the reticulated fiber of the present invention.
  • FIG. 3 is a drawing for explaining a method for obtaining a long-period scattering intensity ratio in small-angle X-ray scattering PSPC. .
  • the fifth surface is a schematic flow sheet showing one embodiment of the method for producing a reticulated fiber of the present invention.
  • Fig. 6, Fig. 7 and Fig. 8 are schematic diagrams showing an example of the press, screw and special mixing structure (Dalmage-type, pin-type) used in this kikin. is there.
  • 9 and 10 show other examples of the method for producing the reticulated fiber of the present invention. It is a schematic flow chart showing the implementation of Kiyoshi.
  • FIG. 11 is a flow sheet showing one embodiment of a method for producing a mesh fiber using a conventionally known screw mixer for comparison with the present invention.
  • FIG. 12 is a diagram showing the relationship between the tensile and tear strength of the nonwoven fabric of the present invention.
  • FIG. 13 is a schematic perspective view showing an example of a suitable shape of a rotational dispersion plate for producing the nonwoven fabric of the present invention.
  • Fig. 14 is a diagram showing details of the rotational dispersion shape of Fig. 13;
  • Fig. 14 (a) is a plan view, and
  • Fig. 14 (b) is a line in Fig. 14). It is sectional drawing by A-A '.
  • FIG. 15 is a schematic front view for explaining the action of the rotary dispersion plate according to the present invention on a textile.
  • FIG. 16 (a) to Fig. 16 (d) show the three-dimensional case where the rotation dispersion plate according to the present invention is installed at a distance where the fluctuation change point of the three-dimensional network fiber is on the collection surface.
  • FIG. 3 is a schematic view of a high-speed photographing apparatus for explaining the action on a reticulated fiber in detail in order of $ 0.
  • FIG. 17) to FIG. 17 (d) show three-dimensional images obtained when the rotational dispersion according to the present invention is installed at a distance where the swing change point of the three-dimensional mesh fabric is higher than the collecting surface. It is a high-speed imaging device observation schematic diagram explaining the effect
  • FIG. 18 (a) to FIG. 18 (d) are schematic views of observations of a high-speed photographing device for sequentially explaining in detail the action of a conventionally known rotary dispersion plate on a textile.
  • FIG. 19 is a micrograph showing a cross section of the nonwoven fabric.
  • FIG. 19 (a) shows a nonwoven fabric according to the present invention
  • FIG. 19 (b) shows a cross section of a nonwoven fabric of a comparative example.
  • Fig. 20 is a photograph showing the surface condition of the nonwoven fabric.
  • Fig. 20 (a) shows the nonwoven fabric according to the present invention
  • Fig. 20 (b) Fig. Shown respectively.
  • the textile of the present invention is a textile formed from a high-density polyethylene-based polymer. And, it is a connected three-dimensional net-like fiber made up of many fine fibrils and having substantially no free ends.
  • the three-dimensional reticulated fiber of the present invention is a novel three-dimensional silk-shaped fiber that is completely different from conventionally known fibers in the mosaic structure of the fiber and in the fibrous form. It is. Therefore, it has excellent mechanical strength and high-temperature properties, and is particularly suitable for producing a heat-bonded nonwoven fabric.
  • the fiber of the present invention has a special feature in long-period feeding in the direction of the fiber axis on a fine-grained structure. And this can be clearly understood by measuring small-angle X-ray scattering.
  • FIG. 2 schematically shows a small-angle scattering photograph of the textile of the present invention.
  • a scattered image 2 showing the presence of fibrils and voids is shown, and a laminar scattered image 3 is shown on the meridian.
  • a long-period small-angle X-ray scattering image of a polymer substance circular scattering, layered linear scattering, layered two-point scattering, layered four-point scattering, and the like are known. It can be seen that the fibers resemble the long-period structure of the drawn and drawn yarns that are subjected to ordinary spinning and drawing.
  • the reticulated fiber of the present invention has a long period of 150 to 200 A. And, they have found an unexpected feature of the present invention that the scattering intensity due to the long period of the Amibushi fiber is not large. That is, from the viewpoint of the long-period scattering intensity, a small scattering intensity means that the long-period structure is not uniform. Or, it was thought that it was not clear, and it was expected that the iron and steel structure would be unfavorable in terms of mechanical properties and mature characteristics.
  • PSPC meridional position-sensitive proportional counter
  • the three-dimensional reticulated fiber excellent in these physical properties shown in the present invention does not unexpectedly have a high scattering intensity and provides a fiber having a novel structure. And, because of this structure, it excels in high-temperature characteristics near the melting point, and becomes a three-dimensional network fiber suitable for a heat-bonded nonwoven fabric.
  • the long period and the scattering intensity ratio are quantified. Then, these are explained.
  • Figure 3 shows the measured scattering intensity vs. angle plot by the PSPC in the meridian direction.
  • the position showing the maximum scattering intensity at the peak of the scattering intensity curve or the shoulder is defined as the long-period scattering angle (2). Let this value be M.
  • the measured scattering intensity value of the angle ⁇ is G, and the value on the line ⁇ is ⁇ .
  • the three-dimensional reticulated fiber of the present invention has a long-period of L50 to 200 A and a long-period scattering intensity ratio of 40 or less.
  • the X-ray 'small-angle scattering described above was measured using the following apparatus and method.
  • ⁇ X-rays were Cu—K with 1.54 persons and 1st SLIT 0.5 mm ⁇ 2nd SLIT 0.3 dragon was used as the pinhole slit.
  • the measurement voltage was 45 kV
  • the current was UOmA
  • the irradiation time was 2 x 10 3 sec.
  • the sample for the measurement was made such that the sample width of the irradiated part was about 2.5 by aligning the mesh fibers.
  • thermophysical measurement is performed without feeling, assuming use as nonwoven fabric.
  • the reticulated fiber of the present invention is characterized by excellent ripening mechanical properties near a ripening bonding temperature and a low elongation rate upon heating.
  • TMA thermomechanical test machine
  • the temperature of 130 at the time of heating under a constant load of 1/10 of denier is preferable. 3% or less, more preferably 2% or less.
  • the measurement was performed at a rate of temperature increase of 2 ° C using “T-3000” manufactured by Vacuum Riko Co., Ltd.
  • thermal and dynamic properties can be determined by measuring with a piperon. That is, the reticulated fiber of the present invention shows a high dynamic elastic modulus even at a high temperature.
  • the temperature at which the dynamic elastic modulus becomes 101 Q dyn / afl is preferably 115 ° C or more.
  • the stability of the crystal at high temperatures is evaluated at the onset temperature of the crystal dispersion of tan5.
  • the fiber of the present invention exhibits a high starting temperature of the stuffing crystal dispersion, preferably 123 ° C. or more, and more preferably 125 or more, and shows that the crystal stability near the bonding temperature is high. You can see that she is overkill in sex. These measurements were carried out using an active viscoelasticity measuring device.
  • the three-dimensional reticulated fiber of the present invention is excellent in ripening stability at high temperatures and ripening mechanical properties, and is suitable for a ripened nonwoven fabric. Caused by the structure.
  • the reticulated fiber of the present invention is also a highly oriented fiber, which becomes clear by measuring the crystal orientation angle by X-ray diffraction. That is, the orientation angle of the textile of the present invention by X-rays is 30. The following are preferred: 20 is more preferable. It is as follows. It is also known that the orientation of the crystalline part and the amorphous part of the polymer can be measured from the infrared absorption dichroism, and is evaluated by the dichroic ratio orientation coefficient F °. '' A parallel dichroic band for polystyrene, 2017 cm— 1 The dichroic ratio orientation coefficient of the textile of the present invention is preferably 0.3 or more. In the present invention, the measurement was performed by using a JIR-100 JFT-100 IS FT-IS apparatus manufactured by JEOL Ltd. and using KRS-5 as an ATR crystal.
  • birefringence measurement of fibers using microwaves can also be used as a measure of the degree of molecular orientation.
  • the birefringence of the present invention is preferably 0.13 or more in the birefringence of 4 GHz using the Micron ⁇ -wave molecular orientation meter j M0A-2001.4 manufactured by Shinwa Paper Co., Ltd. You.
  • the three-dimensional network fiber of the present invention is a highly oriented fiber and has extremely good properties.
  • the three-dimensional network fiber of the present invention has extremely excellent mechanical strength.
  • the fiber In the case of a three-dimensional net-like fiber, the fiber is branched into a net, and when measuring the high elongation of the yarn as it is, a slip-through or the like occurs between the fiber elements, resulting in a large variation in the value. Therefore, in the present invention, in the tensile test, the measurement was performed by burning four times in cm.
  • the steel $ ⁇ of the present invention measured under such conditions has an initial modulus of 15 to 50 g Zd, preferably 20 to 50 g Zd, and a breaking strength of 4 g / d or more. Or more than 7 g / d.
  • a high-strength fiber as shown in the present invention is not known.
  • the three-dimensional mesh steel of the present invention is preferably made of extremely fine fibrils in the form of fibrillation. It is preferable that the specific surface area of the three-dimensional network fiber is 30 irf / g or more.
  • the use of the specific surface area as a scale for expressing the fineness of the fibrils constituting a three-dimensional network fiber is publicly known as disclosed in USP 3: 169,899. It is.
  • the three-dimensional network fiber of the present invention is composed of a fiber which is clearly evident as compared with a known fiber.
  • the specific surface area of the mesh ⁇ of the present invention is 3 0 rrf / g on than is rather preferred, is rather to favored by al 3 5 rrf Roh g or more,
  • reticulated fibers having a value of 100 m / g or more.
  • the reticulated fiber of the present invention is less than the conventionally known fibers in terms of whiteness, covering power, and adsorption performance. I'm stray. When non-woven fabrics using these fibers are manufactured, the fine fibrils can spread the fibers easily and form a uniform sheet. It has many excellent properties such as large surface area, good ripe adhesion, high whiteness and high opacity, and excellent adsorption and filtration performance.
  • the specific surface area was determined by a nitrogen adsorption method, and in the present invention, the specific surface area was measured using “Soft Tomato 180” manufactured by Carlo Elba.
  • a pore-sigma meter for measuring pore distribution by a mercury intrusion method into fiber may be used as a method for measuring the fineness of the fiber.
  • the fiber of the present invention may be used. It can be seen that the amount of mercury intrusion is larger than that of conventionally known textiles, and that it is composed of fine fibrils.
  • the three-dimensional reticulated fiber of the present invention has a unique long-period fiber, despite being composed of extremely fine fibrils. It has structure. It has excellent properties at high temperatures close to the melting point, and also has useful properties such as higher mechanical strength than ever before.
  • an increase in the specific surface area of the fiber indicates an increase in the cross-sectional irregularity, and the mechanical strength decreases.
  • the increase in the specific surface area and the increase in the mechanical strength are simultaneously performed, which cannot be achieved from the conventional concept.
  • the textile of the present invention is a three-dimensional netted iron fiber and is obtained by a spinning method known as franosch yarn.
  • a spinning method known as franosch yarn.
  • the three-dimensional reticulated fiber of the present invention can be obtained from fluffy yarn using a polymer and a solvent.
  • the flash spinning mechanism for obtaining the woven fabric i of the present invention is conventionally known, and is completely different from that.
  • US Pat. No. 3,227,794 discloses that a polymer solution is subjected to a pressure drop at a pressure of a pressure.
  • a technique in which a liquid phase is changed from a single liquid phase to a two liquid phase region and then discharged from a spinning nozzle is disclosed.
  • the present inventors have determined that the fiber structure of the flash-spun textile fiber is determined by the fact that the polymer and the solvent have a citrus separation structure.
  • the discovery of the spinning mechanism has led to the completion of the novel three-dimensional network shown in the present invention.
  • the new flash spinning mechanism provides instantaneous activation of a homogeneous solution of the polymer, and is a two-step process from the previously known one-liquid phase. After forming an activation structure different from the phase separation structure due to the change to the liquid phase, spinning nozzles are spun out to form a knowledge structure based on the activation structure.
  • "Activation" as used herein refers to increasing the pressure loss of the polymer-liquid through the decompression orifice, ie, before and after the decompression orifice. To increase the pressure difference by at least 80 kg, more preferably
  • Activation is performed by setting the pressure difference to more than 120 kg /. This activation is caused by large fluctuations in the density and concentration of the polymer solution, and temporarily gives the solution a structure as if it were extremely difficult to separate.
  • the three-dimensional network fiber of the present invention is obtained.
  • the solvent that has been released to the low-pressure region rapidly evaporates from this condensed activation structure, and the flashing force that expands causes the polymer to begin to solidify, causing the polymer to start to solidify.
  • the flashing force that expands causes the polymer to begin to solidify, causing the polymer to start to solidify.
  • the fibers obtained from this activated structure are made of extremely fine fibrils having a specific surface area of 30 of / g or more, and are unique to the present invention.
  • This is a high-strength three-dimensional network fiber with a long-period structure.
  • the activation of a solution composed of this polymer and a solvent causes the polymer to have a high degree of polymerization and a narrow molecular weight distribution. difference It has been clarified in the study of the present inventors that increasing the value effectively works. .
  • the three-dimensional mesh fabric of the invention of the present invention has a high strength due to its special structure, and the conventional high-density polyethylene cannot be put into practical use due to a decrease in strength by blending with a polymer. It is also possible to blend different types of polymers. Polymers blended with high-density polyethylene include low-density polyethylene, ethylene copolymers, vinyl copolymers, ionomers, polypropylene, polystyrene, and polymethylene. Tactylate and the like.
  • the textile of the present invention is based on a new mechanism for forming a fiber, and the high-density polyethylene constituting the net-like steel of the present invention preferably has a high degree of polymerization.
  • the melt index (MI) I1 of the fiber to be spun is preferably 1 or less. More preferably, it is 0.5 or less (MI measurement is based on iSTM D-1238-5TT condition E).
  • MI measurement is based on iSTM D-1238-5TT condition E).
  • the molecular weight of the polymer that composes the textile It is also important that the distribution is narrow. That is, even with similar MI, if the molecular weight distribution is wide, the performance tends to be inferior.
  • the molecular weight distribution of the protein of the present invention is 15 or less in Mw / n, and more preferably 10 or less.
  • the MI of the raw material polymer used for obtaining the fiber of the present invention is equal to or less than the MI of the fiber of the present invention.
  • the lysis process for obtaining the IS fiber of the present invention is not particularly limited, and a conventionally known lysis process can be used. However, it is preferable to use a method in which the polymer is fed while being melted by a screw extruder, and then mixed and dissolved with a solvent in a mixing tube.
  • the textile of the present invention is made of high-density polyethylene having a high molecular weight and a narrow molecular weight distribution, and the raw material polymer is dissolved in a solvent in a short time, spun, and the polymer is dissolved. It is preferable to prevent any deterioration. Further, dissolution at a high pressure is preferable from the viewpoint of the dissolution rate and the spinning mechanism of the present invention.
  • the solvent used for obtaining the fiber of the present invention is not particularly limited as long as it can be used for fiber spinning, and a conventionally known solvent may be used.
  • a conventionally known solvent may be used.
  • it is Fluorone-1i, such as methylene chloride, tricyclo mouth trifluorene, etc., or hydrogenated hydrocarbons, cyclohexane, etc. A hydrocarbon or a mixture thereof is used.
  • the spinning assembly for obtaining the fiber of the present invention is not limited as long as it can take the above-described spinning mechanism. That is, the orifice for decompression, the decompression chamber, and the nozzle for activating the homogeneous solution may have any conventionally known shape. Next, a method for producing the three-dimensional silk-like iron fiber of the present invention will be described.
  • the production method of the present invention which belongs to Class II, melts using a heated screw extruder and supplies the polymer intermittently to the polymer dissolution area while melting the polymer.
  • a solvent is added to the molten polymer while sealing the inlet of the melting zone with the continuously supplied molten polymer, and the two are mixed and dissolved under high pressure to produce a polymer solution. It specially discharges the polymer solution from the used nozzle to the low pressure region.
  • a method for continuous production of reticulated fibers wherein the method is carried out by using a mechanical mixing region provided in the extruder screw at least in the polymer dissolving zone with little mixing and dissolving. It is preferable that :::: It is more preferable that the above method is a continuous production method of a network fiber in which the mixing and dissolution of a polymer and a solvent are performed in multiple stages in a polymer dissolution region.
  • the above-mentioned method is a continuous production method of a reticulated fiber in which the addition of a solvent and the mixing and dissolution of a polymer and a solvent are performed in multiple stages in a polymer dissolution region.
  • the above method when adding a solvent and mixing and dissolving a polymer and a solvent in multiple stages, each time a solvent is added, the polymer is mixed and dissolved in a polymer dissolving zone, and the polymer is sequentially dissolved. It is preferable to use a continuous method for producing a mesh fabric with a reduced degree. ⁇ More preferably, the above method uses a screw extruder to continuously supply the melted polymer, and the supplied polymer melts the polymer melt zone. When the polymer and solvent are mixed and dissolved under pressure, multi-stage addition of the solvent to the polymer in the polymer dissolution zone causes less mixing. In particular, the first stage is continuously melted by screw extruder. For the lined polymer, it is attached to the extruder screw.
  • Reticulation of the network so as to be carried out in the area of mechanical mixing comprises the step of dissolving the solvent for the polymer in the polymer dissolving zone.
  • At least the first stage of multi-stage addition, mixing, and dissolution involves pressing the molten polymer continuously supplied by a screw extruder.
  • the mixing is performed in the area of the active mixing attached to the screw of the machine, the solvent is added in the second and subsequent stages.
  • the mixing and dissolution are performed using the static mixing element. This is a continuous production method for net fiber.
  • the most significant feature of the present invention is that a high-temperature and high-pressure uniform polymer solution can be easily and stably obtained by using a screw extruder. .
  • the consequence of this is that the solution leaks at high pressure can be resolved, the pressure can be easily increased, and a screw extruder can easily supply the polymer, even if it has a high molecular weight. It can be dissolved.
  • the pole Dissolution occurs in a short period of time, and it also has the effect of significantly preventing polymer degradation.
  • a high molecular weight polymer particularly a high molecular weight polymer which is easily deteriorated in flash spinning, can be used for the first time according to the present invention.
  • Polymer dissolution zone J is defined as a state in which the polymer is in a molten state, and a state in which the solvent and the polymer begin to dissolve in a state in which the solvent and the polymer begin to dissolve from a state without the solvent to a state with a predetermined amount of the solvent.
  • “Seal” means that the gap is filled with molten polymer and contains no flutes, and no flutes can enter.
  • Mating / dissolving refers to a state in which the polymer and the melt are mixed and both are melting.
  • Mechanism mixing refers to the mixing that occurs when an element is forcibly agitating the liquid and that element is driven by an external drive source.
  • high-density polyethylene is used as the polymer
  • the continuous supply means is a screen commonly used in the production of textiles and other various extruded products.
  • An extruder can be used.
  • the screw press machine is composed of a driving motor, a high-speed machine, a hopper for supplying polymer, and a barrel section for ripening and melting the polymer. Power, become.
  • This knurl has a structure that can be ripened by mounting a heater.
  • a screw is installed inside the barrel, and this screw is connected to the drive motor through a thrust bearing and reduction gear.
  • the screw can be divided into three main areas: the supply section, the E ⁇ section, and the measurement section.
  • the polymer is propelled to the exit while being pre-ripened in the supply section. . It melts while being compressed in the compression section and reaches the measuring section.
  • the extruder used in the present invention is provided with a container injection port at the measuring section where the polymer is completely melted, and the check valve is grounded. This valve is connected to a high-pressure metering pump for supplying the solvent.
  • the solvent is injected into the metering section filled with the molten polymer coming from the screw pouring section, and the polymer and the solvent are mixed and dissolved by the screw in this metering section. .
  • the pressure inside the barrel becomes lower than in the case of supplying the screw, and the backflow and ejection of the solvent to the supplied portion of the screw can be prevented.
  • This mixing ⁇ The pressure in the melting section can be freely changed by changing the nozzle size on the outlet side of the extruder. As a result, a pressure suitable for the type and molecular weight of the polymer can be obtained.
  • the residence time of the polymer in this part can be freely changed by controlling the length of the screw.
  • the pressure * temperature * mixing shear force * residence time can be set freely. result As a result, a uniform polymer solution can be easily and stably obtained.
  • Flash spinning solvents and polymers dissolve only after high pressure. Therefore, it is necessary to use a high-pressure vessel instead of adjusting the volume of the solution. In particular, it requires a high-pressure vessel under temperature conditions up to 350 ° c. In addition, a high-E container with stirring is required.
  • a difficult task called the sealing of the movable eclipse.
  • a high molecular weight in the franchiss spinning system for example, a high-density polyethylene with a melt index (Ml) of 4 or less (weight-average molecular weight of 10 10 4 or more). If so, it is necessary to increase the pressure. If the pressure is not high, the molecular weight used is not only limited, but also a relatively low molecular weight takes a long time to dissolve, causing deterioration of the polymer. -The present invention developed a technique called liquid sealing with a molten polymer, and-solved this problem.
  • the space formed by the extruder barrel and the screw is filled with a polymer to prevent the ejection of the solvent gas. What is important in this case is that the space is filled with the molten polymer and flowing toward the front of the screw, and therefore a pressure gradient is created.
  • the length of the supply section is increased to some extent in order to complete the melting. In most cases, the diameter of the extruder is the same as the screw screw's pinch.
  • the length of the feed section is at least ⁇ pitch, preferably at least 9 pitch.
  • the compression ratio of the screw is important for pressure build-up.
  • the compression ratio is 3.0 or more, and when the powder supply is powder, it is 4.0 or more. Is good.
  • the length of the compression section is sufficient to be 5 pitches, but it is preferable that the length be 7 pitches or more.
  • a so-called mixing zone may be provided near the start point of the measurement section. This part is short and should be subjected to high shear.
  • the form of the metering section is preferably longer because a solvent supply port is provided in this section. That is, it is 7 pitches or more, preferably 8 pitches or more. It is better to install the solvent supply port at the third or fourth pitch after the start of the metering section. Of course, even if it is longer than this Good. Further, to facilitate the introduction of the solvent, the diameter of the screw at the portion where the solvent is introduced is reduced. In other words, it is better to increase the groove depth. It is desirable that the length of this portion be at least two pitches, including a little or an increase in the screw diameter.
  • the groove depth of the metering section is 1 mm if the extruder diameter is 35 TM ⁇ . 3 mm density, 65 mm-2 mm: about mm, 90 ma. 3 ⁇ 4 3 ⁇ 4> 2 .5 ⁇ 3 ⁇ 4 4.5, 120 mm ⁇ 3 ⁇ 4 ⁇ ⁇ ram sword; ⁇ ⁇ am, 150 ⁇ 3 mm to -6 mm is preferred.
  • the gap between the outer diameter of the screen and the barrel diameter of the extruder is usually 0.1 to 0.8 mm. The smaller the bore, the better the gap. .
  • ⁇ conditions scan click Li Interview - a in terms of the above dimensions, temperature, disk re-menu rpm -.,
  • P a predetermined temperature - Te Solvent
  • the pressure at the maximum pressure point in the pressing machine is preferably at least 100 kg. This does not mean that operation is not possible even under pressure, but the pressure may fluctuate further due to fluctuations in the discharge amount and the solvent may be ejected.
  • This method is for obtaining a net-like fiber from flash spinning, and after performing this step,
  • step (1) it is necessary to increase the hole-up volume of the mixing section of the present invention in consideration of the residence time required for mixing, but this is the simplest process and is preferable. is there.
  • the high-temperature and high-pressure solution of the polymer and the solvent is flash-flushed by a spinning device to obtain a mesh fabric.
  • This flash discharge method uses a well-known technique, and often uses a depressurizing orifice, a depressurizing chamber, and a spout assembly composed of a spinning nozzle. Discharge is preferred.
  • the shape and structure of these devices can be arbitrarily selected.
  • the polymer solvent system used in the present invention does not dissolve at normal temperature and normal pressure, but dissolves only at high temperature and high pressure. Therefore, as a general feature, they belong to mutually insoluble systems, and do not easily dissolve even at high temperatures and high pressures. For this reason, it is preferable to provide a region for mechanical mixing by attaching to the screw of the extruder. That is, by increasing the contact area between the polymer and the solvent, the dissolving area is increased and the polymer is rapidly dissolved.
  • One way to do this is to provide a special mechanical mixing section on the same floor as the extruder-the term "special" refers to the extruder screw feed, compression section It also means a structure that is different from the screw structure of the measuring section and aims to improve the mixing and stirring effects. For example, a structure called dalmage corresponds to this.
  • the drive system of the extruder is one, and the screw of the extruder has a melting supply section and a special mechanical mixing section with a solvent, and In addition, it has a solvent injection part in the barrel of the middle part.
  • a feeder, a presser, and a meterer which are used for normal melt molding, are added to the front of the normal screw, which has a mixing function. It can be formed by adding a barrel having a special mechanical mixing section provided with a solvent injection port. Also, it may be one uniquely designed for use in the present invention.
  • the molten polymer is supplied by the rotation of the extruder screw, and the molten polymer is surrounded by a solvent provided separately by a metering pump or the like. Is mixed mechanically.
  • the extruder and the structure have a drive system.
  • the sliding part of the extruder has the same structure as that of a normal extruder, and the low-viscosity 'solvent' solvent is blocked by the molten polymer. It does not reach this part in shape.
  • silica structures having a mixing function used for mixing the molten polymer and the solvent there are various types, and these have various shapes, and these can be used in the present invention.
  • it may be of a dal-mage type, of a multi-threaded structure with a notch, of a dam structure, of a multi-row pin structure, or a combination thereof.
  • dams, grooves and pins may be provided on the barrel side to combine with the above-mentioned structure.
  • the revolving body and the barrel may be polygonal, aiming at the second impeachment. These are selected according to the type of polymer used, melt viscosity, type of solvent, mixing ratio, and the like.
  • the first stage involves adding one part of the solvent to the mechanical mixing area attached to the screw, mixing and dissolving it, and then mixing the second and subsequent stages.
  • a static mixing element is used as a dissolving means, and the remaining solvent is sequentially added to each of the static mixing elements to mix and dissolve.
  • the present inventors have considered this problem in various ways, and as a result, have found that the polymer solvent system used for flash spinning is more easily dissolved as the polymer concentration is higher. And found that it was easier to dissolve. As a result, a more preferable method of the extruder dissolution method of the present invention has been invented.
  • the solvent is added in multiple stages using a pump or the like, but it is preferable to add a polymer and solvent mixing operation after each addition of the solvent.
  • This mixing operation can be performed by any technique, such as mechanical stirring using a stirring blade or a mixing screw, or static mixing. Etc. may be employed. Also, by combining these, it is possible to make a very preferable process. :
  • the multi-stage addition of a solvent means an addition divided into two or more stages, where the portion where the polymer and the solvent first merge is one step, and the limit is two steps or more. Not done.
  • the means for adding the solvent after the second stage is not particularly limited, but it is preferable to use a static mixing element. In other words, these are assumed to be devices that have sufficient mixing capacity and do not have a sliding part.
  • the type of the static mixing element is not particularly limited, and may be a conventionally known type or an improved type thereof. Examples of known types include Kenix's Static Mixer, Sulza's Mixer, and Toray's High Mixer. ' •
  • the polymer is preliminarily mixed with a part of the solvent in the early stage of mixing, the viscosity is reduced, and the affinity with the added solvent is also increased.
  • the pressure loss in the static mixing element is small, and a uniform solution can be easily obtained. Therefore, the degree of freedom with respect to the shape and the number of stages of the static mixing element is large and can be selected as appropriate.
  • an arbitrary solvent is employed depending on the polymer used. That is, a combination of a well-known polymer and a Z solvent used for obtaining a network fiber from a flash spinning can be used.
  • the solvent include methylene chloride, and trichloride. Fluoromethane (b), Tricyclone trifrenoleuroethane, hydrogenated hydrocarbons, etc. are used. And these can be mixtures
  • An object of the present invention is to obtain a reticulated fiber from flash spinning, and the ratio of the polymer and the solvent in the present invention can be arbitrarily selected within the range of the object. You. From this viewpoint, the polymer concentration of the spinning solution for obtaining the network is preferably 5 to 20 wt%.
  • the amount of the solvent necessary for achieving the final polymer concentration of the spinning solution is determined for the continuously supplied polymer. Divide and inject. Since the addition is carried out in substantially multiple stages, it is preferable to add a solvent amount in the range of 1 to 99% of the total solvent amount in each stage. Preferably, 1 to 90% of the solvent is added in the first stage, more preferably 5 to 80%. Then, the necessary remaining solvent is added at a later stage. However, it is also optional to add these in a more divided manner, and the dividing method may be arbitrarily selected. '
  • I 0 weight average molecular weight of about 7 ⁇ 10 4 or less, preferably 1 (weight average molecular weight of about 15 ⁇ 10 or less, more preferably 0.8 (weight average molecular weight of 16 ⁇ 10 4 ) or less; It can be used up to 0.05 (weight-average molecular weight of about 40 ⁇ 10 4 ).
  • 'A melt index of 1.0 to 0.1 can be recommended as a particularly preferred range. The polymer is melted in an extruder in the range of 200 to 300. The melt index is increased by 0.8 as the force decreases.
  • the ripening temperature needs to be set high
  • the screw shape used may be a pitch structure with the same screw screw pitch and screw diameter that are usually used, but the high molecular weight (Ml is small) Polymer requires a longer feed section
  • the polymer dissolution zone has a solvent inlet through which solvent is injected.
  • the solvent injection pressure depends on the pressure of the polymer dissolution zone. The pressure in this polymer dissolution zone is used to create a homogeneous polymer solution.
  • the pressure in the polymer dissolution zone is determined according to the molecular weight of the polymer, and the solvent injection pressure is determined correspondingly. Therefore, it is advisable to use a pump that raises the maximum shochu pressure (approximately 500 kg / cm 2 ⁇ G in a row) and pumps out a constant volume regardless of the pressure. There is a pump.
  • the solvent to be injected may be ripened or may not be ripened. A little heating is preferred because mixing and dissolving can be performed stably.
  • the force depending on the type of the solvent is within a temperature range of 50 ° to 200 ° C. for fluorocarbons.
  • the check valve may be of a commonly used structure, but preferably has a structure that is easy to clean when the boiler is clogged. Further heating this valve is recommended.
  • the pressure in the polymer dissolution zone is the point at which it is completely filled with the decayed vol- ume, that is, shortly before the solvent inlet, the screw in the screw of the screw.
  • the pressure in the area starting from two to three pitches before reaching the decompression chamber orifice.
  • This pressure is as follows when the polymer is a high-density polyethylene. In other words, if it is a polymer with a mole index of 5.0 (M i), it is about 150 kg / crf ⁇ G to 350 kg Z cn! Ma in a flat et 1 60 ⁇ 360 kg cm 2 - about G, 0. 8 the volume Li Ma - if 1 70 ⁇ 400 kg / ci 'G , 450 200 ⁇ if port re-mer 0. 3 kg d - G, if it goes beyond 0.3 and reaches 0.03rd place, 250 Mixing and dissolving can be performed sufficiently by applying a pressure of ⁇ 500 kg / dG.
  • a hollow metal 0 ring type is easy to use as a seal for the flange.
  • the metal seal is convenient for the seal of the detector.
  • the sealing in the direction of the end of the screw 1 is performed with a fluid sealing force of the melted vol- mer, so that at least the number of screws of the screw of the screw is used.
  • the pressure at the position before the touch must be higher than the pressure at the solvent injection section.
  • the space volume of the solvent injection section should be larger than the space volume of the extruder hopper side. That is, the groove depth may be increased. Due to such a structure, the pressure immediately before the solvent injection port is higher than the pressure in the polymer dissolution zone. Due to this pressure gradient, the solvent is completely sealed and does not flow back to the hopper or blow out.
  • a gear pump should be installed at any point in the polymer melting zone.
  • the most preferred installation point is after the special equipment mixing section. With such a configuration, a fluid seal made of a polymer melter is more complete. ⁇ At the solvent injection section, the polymer and solvent merge and pull into a special mechanical mixing section. This 0 portion has the same shape as the screw as a preferable form. Therefore, the rotation speed is the same as the screw rotation speed. However, in the case of the mixing unit of this type, the pump capacity is not provided, and the mixing and stirring function is mainly used.
  • the temperature of the destructive mixing section is preferably set lower than the temperature of the screw extruder.
  • the solvent system used for flash spinning is a LCST-type solution as described in the polymer solution theory. There is no need to increase the temperature of this part.
  • the appropriate temperature is also preferable from the viewpoint of preventing polymer deterioration.
  • the form is preferably a dull-mage type, or a kneader type or a rear type, but this type is adopted.
  • the load becomes large, and a large amount of heat is generated. It tends to be.
  • a part thereof may be changed to a pin-type mixed structure.
  • the addition amount in the first stage should be 10 to 70% of the total addition amount.
  • a gear port and a pump may be provided next to the special local mixing section.
  • the form of the gear pump may be the one usually used for extrusion molding.
  • the shaft seal of the gear pump is the shaft seal of the gear pump.
  • the viscosity of the mixed polymer solution in this part is about 30 to 500 centipoise, which is higher than that of the fluid on the port side. Therefore, it can be used with a normal ground seal.
  • a better sealing method is to allow a small amount of the solution to leak at the beginning-because the leak precipitates and fills the erosion gap with the polymer, which encourages the lubricant.
  • the pressure in the subsequent area can be further increased, and the degree of dissolution can be freely controlled.
  • the pressure of the special mechanical mixing section can be freely controlled by the rotation speed of the gear-pump. Therefore, by increasing the pressure in this part, dissolution at a higher pressure can be performed, and dissolution can be accelerated.
  • the setting of these pressures depends on the type and amount of polymer 'solvent Since it changes, an optimum value may be set by a trial and error method.
  • the mixed polymer solution from the previous stage may be discharged into the solvent as if it were "Sou", or a number of solvent jets D. may be provided in the piping cross section. I prefer to do it.
  • At least 40 stages are required for the static mixing element. Therefore, even if the pressure loss per static mixing element is small, the total pressure loss is as follows. Therefore, it is recommended to collectively support each unit, collect all stages and collectively support at the outlet side. Unless such measures are taken, buckling may occur at the final stage.
  • the temperature of the piping system including this static mixing element may be lower than that of the previous stage. Since the temperature of the polymer solution is determined in this part, it is preferable to lower the temperature unless a trouble occurs. 160-200 for high density polystyrene examples, preferably '170-180 It is.
  • the pressure fluctuation width immediately after the final stage of mixing and immediately after the compression chamber is preferably 5 / cm 1 'G or less, more preferably 3 kg / erf ⁇ G or less.
  • a filter may be provided in the final stage of mixing and immediately before the pressure chamber. ⁇ There are various types of filters, but a filter having a large filtration area and a small pressure loss is preferable. In general, a pre-type or disk-type surface filtration method may be used.
  • the distribution system including the mixed area, shall have a structure in which no ban part occurs as much as possible. If there is a blind spot that causes stagnation, a degraded bolimer will occur, and this degraded material will fall off and plug the orifice hole. This has very undesirable consequences.
  • This part is Wheels ⁇ Consists of a decompression chamber and a spout orifice.
  • the shape, dimensions, and the like of this part are the same as those of a conventionally known technique. However, the dimension of the orifice will be determined in consideration of the pressure in the polymer melting zone and the pressure in the compression chamber.
  • the pressure and temperature of this part of the decompression chamber flash spinning section is 40 kg ⁇ ⁇ ! ⁇ G 1 50 kg cr crf ⁇ G and 1 501 in the case of high-density polyethylene. 90 c.
  • the optimum value of the temperature ⁇ pressure varies depending on the operating conditions, and is particularly affected by the molecular weight of the polymer. Basically, in some sense, a disadvantage of phase separation occurs. Therefore, the conditions of the decompression chamber are determined in consideration of the operating conditions and the state of phase separation.
  • FIG. 5 to FIG. 10 show an embodiment of an apparatus for carrying out the method for producing a reticulated fiber of the present invention.
  • FIG. 5 shows a flow chart of a typical process of the present invention
  • FIG. 6 shows the inside of a screw extruder used for this. That is, as shown in FIG. 5, the manufacturing apparatus is provided with an extruder 4 barrel 5, a solvent pump 6, and a spinning device 7. The melt is melted by the extruder 4 and sent to the melt zone where the melted polymer in the renole 5 is closed. Solvent is pumped from a separate solvent pump 6 through a polymer check valve (not shown) into the poly-dissolution zone. The rotating screw in the barrel 5 mixes and dissolves the solvent and the poly to form a uniform poly solution, which is sent to the spinning device 7.
  • the spinning device 7 comprises a decompression orifice, a decompression chamber and a spinning orifice, and a heating device. At this point, the polymer solution is spun into a low-pressure region through the spout orifice, forming a continuous mesh fabric.
  • the extruder barrel 5 has a screw 1i in the barrel as shown in Fig. 6, and this screw is provided with a lined section 12, a compression section 13 and a weighing section 14, 15, It consists of 16. 'Looking closer at this metering section, metering section 14 is filled with molten polymer coming from compression section 3 and cannot flow back to hopper port 1 if melted .
  • the measuring section 1554 has a larger depth than the front section 16 and the rear section 14, so that a minimum pressure portion is formed in the measuring section. For this reason, the solvent from the solvent inlet 18 is easily injected into the extractor barrel.
  • the molten polymer coming from the front of the metering section 14 and the solvent coming from the inlet 18 are mixed by the screw rotating at the rear section 16 of the metering.
  • the solution flows out of the opening 20 as a solution.
  • the metering units 14, 15, 16 are optimized by the polymer flow rate and the solvent flow rate.
  • FIG. 8 shows another preferred embodiment of the extruder.
  • Fig. 7 shows the structure of the extruder used to carry out the present invention and the special mixing structure (mixing mixer) of the screw and the co-wheel.
  • the polymer is supplied from 17 and is melted by the screw 21 by the face rolling of the driving system 19 and extruded forward (to the right in the figure).
  • the solvent is added from the solvent inlet 18 installed in the barrel 5, and the two are mixed by the mixing structure (dalmage type) 22 to reach the outlet opening 20 of the mixture.
  • Fig. 8 is a structural diagram with mixed structures (Dalmage type and Pin type) 22 'and 22 "having different shapes from Fig. 7.
  • the mixture coming out of the outlet opening 20 is directly guided to the spinning device, or after that, a solvent is further added and a mixing operation is performed, and then the mixture is guided to the spinning device. To obtain a reticulated fiber. .
  • the diameter of the screw of the extruder is selected according to the production amount of the mesh fiber to be produced, and the diameter of the same structure is the same as the diameter of the screw of the extruder. Or different. In each case, the length of the structure is arbitrarily determined depending on the required mixing degree and the volume of the hole-up in consideration of the residence time.
  • FIGS. 9 and 10 show the present invention.
  • 4 is a schematic flow chart showing a further preferred embodiment (equipment) of the present invention, wherein reference numeral 4 denotes an extruder 5, a barrel 8, a special mixing section 8 coaxially with the extruder 5, and a solvent bottle 6.
  • 9 shows a mixing section composed of a static mixing element
  • FIG. 9 shows an example of multi-stage mixing, that is, the polymer was mixed and melted in a special mixing section denoted by reference numeral 8. Thereafter, the mixture is further mixed and dissolved in the static mixing section 9.
  • Figure 10 shows the process flow sheet in which the solvent is added in multiple stages and mixed and dissolved each time. That is, the solvent is added to the first-stage mixing section 8 from the first-stage solvent pump 6, mixed and dissolved, and further added and mixed and dissolved in the second-stage mixing section 9 from the second-stage pump 6. To obtain a polymer solution of the same polymer concentration.
  • the stirring mechanism for dissolving the polymer can be reliably closed,
  • '' ⁇ polymer can be dissolved in a short time to dissolve the polymer in a short time because the mixing effect is large, and the mixing effect is large, and the polymer is dissolved using the thermal power and chemical characteristics of the solution. Since high molecular weight and narrow molecular weight distribution of the polymer can be dissolved uniformly, and the flashing force can be extremely increased by spinning under high pressure, A high-density polyethylene-based three-dimensional network fiber with a long-period scattering intensity ratio of 40 or less is generated, and a three-dimensional network fiber with a long period of 150 A or more and 200 mm or less is obtained. -In addition, a three-dimensional network fiber having a specific surface area of 30 nf ng or more is produced.
  • a high-pressure uniform solution comprising a high-density polyethylene-based polymer and chlorofluorocarbon is composed of a decompression orifice, a decompression chamber, and a spinning nozzle.
  • a high pressure difference is generated before and after the high pressure orifice. And activates the body.
  • the production method of the present invention which belongs to a further class, differs from the conventionally known method of spinning by setting the conditions of the pressure chamber so that the polymer liquid belongs to the two liquid phase region. Spinning from one liquid phase region As a result, there is a clear advantage that the pressure in the decompression chamber during spinning can be increased.
  • the present invention it is possible to obtain a higher solvent flashing force than conventionally known techniques, and it is possible to obtain a high-strength fiber that is stretched and oriented more highly. . Further, since the pressure in the decompression chamber can be increased, it is possible to obtain high-strength steel by spinning at a relatively low temperature at which the decomposition of the polymer solvent does not occur. Means both one-phase solution and two-phase solution.
  • the high pressure difference referred to in the present invention means that, for example, an orifice is provided at an inlet of a decompression chamber and a pressure difference is generated by this orifice ', which is not implemented by a conventional method.
  • a high pressure difference means a pressure difference of at least 80 kg / oi G or more.
  • Activation means that when a phase separates from one liquid phase to two liquid phases, the liquid undergoes kinetic fluctuations so that phase separation occurs easily. For example, it means that fluctuation such as density occurs. Whether it is activated or not can be determined by measuring light transmission through a pressure vessel with an optical window and a container. That is, when a high pressure difference is generated in the one liquid phase solution, the transmitted light is not transmitted at all. After a while, a clear solution is obtained. This temporary fluctuation means activation of the liquid.
  • This pressure difference must be high enough to activate the liquid, and is arbitrarily selected according to the polymer used, the concentration, and the like. For example, it is preferably at least 30 kg / erf G.
  • a large pressure difference is suddenly generated in the ⁇ pressure orifice, causing some structural change in the solution, leading to a ⁇ pressure chamber, and discharging the solution at a higher pressure than the spinning nozzle.
  • This ⁇ 0 structural change is caused by thermodynamic fluctuation due to high pressure difference.
  • This thermodynamic fluctuation generally means, for example,
  • phase diagram showing the boundary condition h of one liquid phase and two liquid phases of the polymer solvent referred to in the present invention is obtained by measuring the phase equilibrium of the polymer solution.
  • the pressure is gradually changed while keeping 25 at a constant temperature. Also remove the solution Gradually change the temperature while maintaining a constant pressure. Alternatively, depending on the case, the temperature and the pressure may be simultaneously and slowly changed, or the like, and any method may be searched for.
  • the specific solution activation method in the present invention means a large pressure change, as shown in A : - ⁇ B of FIG. That is, A is the pressure of the solution and B is the pressure in the pressure chamber. And, as described above, the mesh steel obtained from such a large pressure difference is a non-conventional weaving fiber, and as shown in Fig. 1, point B is one liquid phase.
  • the spinning method is preferred.
  • the amount of the polymer in the polymer solution is 4 to 25 wt%, and preferably 5 to 20 wt%.
  • the batch type generally uses an autoclave equipped with a stirrer device.
  • the autoclave is a stirrer for mixing and stirring the polymer solution, a resistance thermometer for detecting the temperature inside the autoclave, and a diaphragm type for detecting the pressure inside the autoclave. It has a pressure gauge.
  • a polymer is added into the autoclave, and the lid and the body, which form part of the autoclave, are connected by a mounting bolt.
  • the inside of the autoclave is evacuated through a valve to completely remove the air, and then the solvent is introduced from the valve and sealed.
  • the polymer and the solvent in the autoclave are ripened by the built-in heater provided on the entire surface of the autoclave while being stirred by the stirrer.
  • the polymer can be dissolved in a solvent.
  • the temperature and pressure conditions be such that the polymer solution can be maintained in a clear, homogeneous phase. This is equivalent to setting the stirring in the autoclave to one liquid phase condition in the Kanazu diagram.
  • a flash which occurs adiabatically at a temperature of a preferable solution is higher than a temperature at which the polymer dissolves in the solvent. This is the temperature at which the amount of heat required to evaporate the existing solvent is needed. If the extrusion temperature is too high, the degradation of the polymer will be marked by radicals generated by the aging of the polymer and the thermal decomposition of the fermentation medium, and the degradation of the polymer will be significant. Causes deterioration and coloring.
  • the pressure of the solution in the autoclave can be arbitrarily selected as long as the pressure is higher than the above-mentioned boundary pressure for maintaining a clear homogeneous solution.
  • the required pressure can be obtained by a mechanical pump or pressurization of an inert gas.However, the inside of the autoclave is completely filled with the solution, and the desired pressure is applied by utilizing the ripening of the solution. The method of obtaining is preferred.
  • the pressure of the solution is measured by a diaphragm pressure gauge.
  • the polymer solution consisting of a large phase passes through the autoclave and the vacuum chamber by the pressure in the autoclave, and then through the spinning nozzle. It is rapidly released under atmospheric pressure and flash spinning is performed.
  • patch operation such as autoclaving
  • the solution is In order to keep the internal pressure of the lave constant and to keep the flow rate of the solution through the spinning nozzle constant, a method of increasing the pressure using an inert gas pressure or a liquid pressure such as nitrogen may be used.
  • the polymer solution extruded from the discharge valve causes a pressure drop when passing through the decompression orifice, and the pressure in the decompression chamber measured by the diaphragm type pressure gauge and the pressure of the solution are increased.
  • the difference between the pressure and the pressure is set to a high pressure difference sufficient to activate the liquid. For example, at least 80 kg Z cm ; G or more is preferred.
  • the temperature of the pressure chamber is maintained at the same level as the solution or slightly lowered.
  • the solution discharged from the spinning nozzle is highly fibrillated due to the flash of the solvent and solidification of the polymer, and is fully stretched.
  • the vacuum orifice, vacuum chamber and spinning nozzle used in these spinning processes may have any conventionally known shape and structure. That is, it is sufficient that the pressure difference of the low pressure orifice, which is a necessary condition for the present invention, is sufficient to activate the liquid.
  • the depressurization orifice appropriately corresponds to the viscosity, flow rate, extrusion pressure, and spinning temperature of the solution so that the polymer liquid belongs to one liquid phase region in the phase diagram in the decompression chamber.
  • the diameter and shape of the spinning nozzle are arbitrarily selected.
  • the volume of the pressure chamber is selected so as to have a residence time for maintaining the activated state of the liquid, and is usually about 0.5 to 1 O c c, but is not particularly limited.
  • the spinning method of the present invention can be carried out in either a batch system or a continuous system.
  • a continuous method if a method is used in which the entrance of the polymer dissolving area is sealed with a molten polymer using a screw extruder, it is easy to produce a high-pressure homogeneous solution.
  • Multi-stage addition of solvent to the polymer At least the first stage of mixing and dissolving, for the polymer that is illegally melt-filled by the screw extruder, This is performed in the area of the target mixing provided in the screw of the extruder. When the solvent addition, mixing, and dissolution in the second and subsequent steps are performed using a static mixing element, a more uniform solution is used. It is easy.
  • the present invention which belongs to the category, is characterized in that a high force difference is generated in a polymer solution, instantaneous thermodynamic fluctuations are generated, and the spinning is performed in an activated manner.
  • a high force difference is generated in a polymer solution, instantaneous thermodynamic fluctuations are generated, and the spinning is performed in an activated manner.
  • the fiber is spun from the liquid area, there is no upper limit to the force in the “pressure chamber”, high pressure conditions can be taken, and flash flushing is large.
  • a highly fibrillated three-dimensional network fiber having an intensity ratio, a long period of 150 mm or more and 200 A or less, and a specific surface area of 30 or more is produced.
  • FIG. 4 shows a phase diagram of high-density polyethylene and fluoro-1i measured in the example of the present invention, and illustrates the polymer concentrations of 12 wt% and 15 wt%. .
  • the nonwoven fabrics belonging to the category I are composed of high-density polyethylen-based fluffy three-dimensional mesh fibers deposited in random directions and firmly and firmly bonded to each other. And an inner layer that is weaker than the surface layer and is thermally bonded to the film-like fiber layer, and has an inner layer having a specific surface area of 5 rrf / 'g. It is a continuous mesh fabric with high tensile strength and high tear strength, and more preferably, the nonwoven fabric has a tear strength of X (kg / 50 g). Method), the tensile strength is defined as Y (kg 3 cm 50 g / m), and the strength of each of the non-woven fabrics is proportional to the standard basis weight of 50 g / m 2. 3 ⁇ 4 0.4,
  • a high-density polystyrene-based three-dimensional continuous mesh fabric is randomly arranged and deposited. — That is, the flash-spun three-dimensional network substantially free of ends is spread, and the fiber elements are arranged so as to be substantially uniform in all directions, and are deposited and accumulated. Has become a texture.
  • the textile is heat-bonded in the surface layer.
  • This surface layer has a firm bond and does not fluff even if the surface is strongly rubbed with a finger. And this firmly bonded layer Both sides of the front and back sides, or any one side are formed.
  • the heat bonding strength of the inner layer of the nonwoven fabric is different from the heat bonding strength of the surface layer. That is, the inner layer is a film-iron layer in which the degree of aged adhesion is more gradual than that of the intermediate layer, and thus the inner layer fiber form is left in a large amount. As a result, the D surface layer and the inner layer are independent and form a nonwoven fabric structure.
  • non-woven fabrics belonging to Class J1 are conventionally known; they are characterized by having a higher specific surface area in each layer than a paper-like three-dimensional network fibrous non-woven fabric. It has physical properties.
  • the inner film-like fiber layer in the present invention refers to a layer that is partially film-shaped and partially fiber-shaped, and is a layer that is forcibly connected to another layer.
  • the independent three-dimensional net-shaped steel fiber having a length of 10 to several tens ⁇ or more It is a layer that has not been able to find a fiber as a continuum and has undergone sufficient bonding to be cut in the middle.
  • Non-woven fabrics belonging to the category are characterized in that the specific surface area of this inner layer exceeds 5 tn 2 / g. That is, it is a non-woven fabric having a high specific surface area, which is unprecedented as a layer constituting a three-dimensional net-like nonwoven fabric such as paper, and excellent in opacity and covering power.
  • the specific surface area of the inner layer is determined by mechanically peeling off the surface layer and the inner layer, and without peeling off the film-like or textile-like material straddling between the layers at the time of separation, using a cutter or the like. It can be obtained by cutting into layers and measuring the specific surface of each layer. In the present invention, the measurement of this area was carried out by the BET method of nitrogen adsorption, and was measured by using a soromatic 1800 manufactured by Carlo Elba.
  • the specific surface area of the nonwoven fabric measured without obstructing the inner layer / surface layer of the nonwoven fabric is 5 / g or more.
  • This nonwoven fabric has an unprecedentedly high mechanical strength, despite having a high specific surface area as described above.
  • a large specific surface area means that the bonding between the fabrics is insufficient and mechanical strength cannot be expected, but in the present invention, both are achieved simultaneously.
  • the surprising effect is obtained. That is, the relationship between the tensile strength and the tear strength, which represents the mechanical strength of the nonwoven fabric, has never been better. Between the tensile strength Y (kg 3 cm width 50 gnf) and the tear strength X (kg / 50 g / m) by Elmendorf, X ⁇ 0.4
  • the strength of the nonwoven fabric is a value converted in proportion to the standard weight, and in the present invention, the standard weight is 50 g / rf. That is, the basis weight of the non-woven fabric belonging to the category I may be 15 to 200 g / m, but is preferably 20 to 120 g / rri, and the central basis weight is 50 g / m '. The strength was determined on the basis of 50 g according to.
  • the dotted line in the scope of the present invention indicates data using the fabric described in the comparative example.
  • nonwoven fabrics usually have directionality, the vertical and horizontal directions, and, if necessary, the oblique direction are measured when determining their physical properties.
  • Non-woven fabrics belonging to the JL category are arranged in such a way that each fiber element of the mesh fabric is arranged almost uniformly in all directions as in the previous arrest. Can be measured and the average can be found.
  • the physical ratio of vertical / horizontal is included in the range of 1.3 ⁇ 1 to 1 ⁇ 3 for non-woven fabric belonging to classification ⁇ .
  • the directionality of the fiber in the nonwoven fabric can be relatively easily obtained from the transmittance of the Mic polarization in each direction, and by using this method, it belongs to the classification of the present invention. The effect on the direction of the nonwoven fabric can be confirmed.
  • the directionality of the nonwoven fabric due to the microwave is measured using, for example, “Microwave Molecular Orientation Meter” OA-200 U manufactured by Shinzaki Paper. -'
  • the tensile strength of the nonwoven fabric is measured according to J IS- 1068 and converted to a standard basis weight of 50 g Z rrf and Y (kg / 3 cm width 50 g / m).
  • the elemendorf tear strength of the nonwoven fabric was measured in accordance with JIS-L-1085, and converted to the standard basis weight as X (kg / 50 g / m).
  • JIS-L-1085 JIS-L-1085
  • High-density polyethylene adheres at a temperature close to the melting point of the crystal in order to achieve strength as a nonwoven fabric, maintain its shape, and fuzz the surface. Therefore, in order to obtain a mature bonded nonwoven fabric, it is necessary that the mature bond between the fibers is strong, that shrinkage does not easily occur during the mature bond, and that the fiber has a high strength at the high temperature near the bonding temperature.
  • the above-described three-dimensional network fiber is used as a woven fiber.
  • heat bonding is performed by using the net-like textile according to the present invention, which is made of extremely fine fibrils, has a unique structure for a long period, and has excellent high-temperature characteristics.
  • a nonwoven fabric belonging to the above is obtained, and the nonwoven fabric has a high destructive strength.
  • the non-woven fabric of the present invention belonging to the above-mentioned category II is also characterized by being opaque. That is, the conventional heat bonding method However, because of the large specific surface area of the reticulated fiber, it reflects light irregularly and has excellent opacity. " Furthermore, since the mechanical strength is high and the high-temperature properties are good, the fiber is not easily damaged by the mature bonding, and the mechanical strength is developed even if the bonding degree is not increased. And opacity
  • the opacity of this non-fiber fabric is different from that of covering materials such as packaging materials, envelopes, and clothing.
  • the laser light was applied to a non-woven fabric, the amount of light transmitted through the non-woven fabric was measured with a laser parmeter, and this position was continuously shifted and averaged.
  • ⁇ the amount of transmitted light varies depending on the basis weight of the non-woven cloth, and if the basis weight increases, the amount of light decreases.
  • the basis weight is 25 g Z m and the light quantity is 25 W or less, and at 40 g /
  • the weight is less than 12: ⁇ W at 60 g of below W W.
  • other useful physical properties can be imparted to the nonwoven fabric of the present invention to which the classification belongs, while maintaining the above-described mechanical strength and opacity.
  • the nonwoven fabric of the present invention can employ various conventionally known methods in the heat bonding step. Usually, the nonwoven fabric has a large bonding area in order to increase the mechanical strength of the nonwoven fabric. A possible thermal bonding method is adopted. In these heat bonding methods, a flat roll method using a flat roll, a shallow emboss roll of 100 pcs / cnf or more, or a mouthless press method using a sandblast roll is used. It is possible to adopt the rule of force rendering and the method of full calendar rendering. The bonding surface of the nonwoven fabric of the present invention belonging to the category #L obtained from these has a smooth appearance.
  • the water pressure resistance was measured according to JIS L 1092, and the Gurley-hill i3 temper was measured using a B-type Gurley-type densometer.
  • the nonwoven fabric of the present invention belonging to the class J1 is a non-adhesive sheet in which the fiber elements are arranged in a random direction by spreading the three-dimensional netted fabric as it is, as described above. It is heat bonded.
  • any conventionally known process may be selected.
  • the dissolution process for obtaining the fibers constituting the nonwoven fabric of the present invention is not particularly limited, and a conventionally known dissolution process can be used.
  • This fiber is composed of high-density polyethylene with a high molecular weight and a narrow molecular weight distribution.
  • the raw polymer is dissolved in a solvent in a short time and spun to prevent deterioration of the polymer.
  • To do And melting at high pressure from the spinning machine is required.
  • Spindle assembly for obtaining this textile is not limited as long as it can take the above-mentioned spinning mechanism. That is, the orifice for decompression, the m-chamber nozzle, and the like for activating the homogeneous solution may be arbitrarily used.
  • any known method and apparatus may be used. Basically, it consists of a collision device that spreads the reticulated steel that is spun-a device that determines the direction of travel of the fiber that has spread by collision, a device that gives charge to the spread fiber, and a device that receives and deposits the fiber. ing. That is, a number of methods such as [63, 899, Special Publication No. 44-218 ⁇ , and l) SP3 : 456, 156, and improvements thereof are known, and these methods can be used. , Especially restricted ⁇ , o
  • nonwoven fabrics belonging to the classification are made of high-density polyethylene-based fibrous three-dimensional netted fibers, arranged in random directions, deposited in an S-shape, and partially unfused independent A nonwoven fabric including a layer made of mesh-shaped steel fibers, wherein the independent mesh fibers have a long-period scattering intensity ratio of 40 or less.
  • nonwoven fabrics belonging to the class are composed of high-density polyethylene-based three-dimensional network-connected fibers, which are randomly arranged and deposited. That is, the flash-spun three-dimensional net-like fiber substantially free of ends is unrolled and each steel element is expanded.
  • the layers are arranged so as to be substantially uniform in all directions, and the series is deposited in layers to form a non-woven fabric.
  • the nonwoven fabric has a partially unfused, or at least part of, a loosely bonded layer in at least a part of the many fiber layers constituting the nonwoven fabric. That is, the above-mentioned layer is provided on the surface of the nonwoven fabric or on the inner layer portion, and an independent net-like fiber can be taken out from this layer.
  • the independent net-like fabric referred to here is, for example, a bundle of steel-like materials generated on the end face when the layers are separated, and separated from other materials by careful pulling. A net-like fiber that can be pulled continuously. Therefore, in this layer, it is not firmly adhered to the film, is not adhered at all, or is loosely adhered '. Therefore, unlike this non-woven fabric belonging to the category i, the woven fabric has a freedom of movement of the reticulated fabric formed in the non-woven fabric, and as a result, flexibility is provided.
  • Such an independent reticulated fiber retains the fiber form and is a continuous fiber of 20 ⁇ or more, and X-ray small-angle scattering can be measured in line.
  • the characteristics of the fine structure of the mesh fiber constituting the nonwoven fabric of the present invention appear. That is, it is characterized in that the long-period scattering intensity due to small-angle X-ray scattering is 40 or less. This indicates that the characteristics of the mesh fabric used to produce the nonwoven fabric of the present invention are manifested as they are. In other parts, the long-period scattering intensity ratio of the part that retains the fiber shape even when the fiber is subjected to a strong thermal bonding process is almost the same as that immediately after spinning. It does not change. On the other hand, the independent reticulated filament in the nonwoven fabric which has undergone the mature bonding treatment tends to increase in long cycle, and is preferably 150 A or more.
  • Non-woven fabrics belonging to the above-mentioned category are made of fibrous fibers which are extremely gross, similar to non-woven fabrics which belong to the above-mentioned category. It is a mature glued apricot, and is highly opaque to soldiers because of its high mechanical strength and high temperature characteristics near the melting point.
  • the nonwoven fabric of the present invention belonging to the category ⁇ includes a layer capable of taking out an independent reticulated fiber form, and the other layers are more firmly adhered to the film even if they are similar layers. May be. That is, any conventionally known method for deeply bonding the sheet may be employed, such as pressing between rolls, force-rendering, and embossing.
  • the nonwoven fabric may be a non-adhesive state or a state of being compacted by pressure without performing any heat treatment contributing to adhesion to the sheet-like material.
  • nonwoven fabrics in which fibers are entangled with a needle punch or water punch or the like, and nonwoven fabrics in which mature bonding is used in combination are also included.
  • the nonwoven fabric according to the present invention belonging to the category is a nonwoven fabric in which spread three-dimensional mesh fibers are deposited in random directions, and is a bundle present in the mesh fabric constituting the nonwoven fabric. If the shape is a bundle having a density of 40 denier or less, or a bundle having a density of 40 denier mm or more, the width is 5 TM or less and the length is It must be a bundle of 30 or less.
  • the present inventors have found that when the opened three-dimensional mesh fabric constituting the nonwoven fabric does not have a specific opening defect portion, the nonwoven fabric becomes a very uniform nonwoven fabric in terms of appearance and weight distribution, A non-woven fabric belonging to the classification ox by Kakimoto Kamoto of the keen study was obtained.
  • This specific unwoven area is defined as a three-dimensional net-woven fiber that has been unwound after flash spinning, which has been condensed during the sheeting process and has a width of 40 denier-mm. It is a bundle that has been bundled to a fiber density or higher and has a width of 5 mm or more and a length of 30 nm or more.
  • the bundle portion means a bundle formed by fibrils of the entire three-dimensional network fiber and a bundle formed by consolidating a part of the fibrils of the three-dimensional network fiber.
  • the fiber density was determined by taking continuous fibers having a length of 2 on or more for about 100 cm in length, measuring the spread width every 2 cm, and dividing the weave degree by the spread width.
  • Such a nonwoven fabric made of an opened three-dimensional net-like fiber having no specific opening defect portion is a sheet width variation rate of the sheet expressing the macroscopic uniformity of the nonwoven fabric ( R) is 0.3 or less, and a laser spot expressing microscopic uniformity of the nonwoven fabric. It is more preferable that the transmission light quantity change rate of the incident light is 0.5 or less. Dropping such conditions can provide a very uniform illusion.
  • the bulk variation rate (R) and the transmitted light quantity variation rate are defined as follows.
  • the basis weight Xi was measured with a 1 cm II X 5 cm long sample, and the average value was obtained.
  • R X ma X - is calculated by using the X m in.
  • the nonwoven fabric belonging to the classification JL according to the present invention is a macroscopically and microscopically uniform nonwoven fabric.
  • the unwoven fabric constituting the nonwoven fabric does not form a bundle having a width of 50 mm or more and a length of 30 or more, which is focused to a fiber density of 40 denier dish width.
  • the nonwoven fabric according to the present invention employs the nonwoven fabric according to the flash spinning method, which is the first to achieve the uniformity. A three-dimensional reticulated fabric is obtained.
  • the opened high-density polyethylene-based three-dimensional network fiber constituted by the nonwoven fabric has a long-period scattering intensity ratio of 40 or less and a long-period of 150 A or more.
  • a nonwoven fabric with high strength, high thermal nucleus properties, high opacity, and high covering power, which has never been seen before, is excellent in uniformity.
  • the nonwoven fabric belonging to the classification day obtained in this way can be applied to applications such as filter fields using the high degree of uniformity.
  • the manufacturing method belonging to the classification _L includes: a rotatable disk portion; a cylindrical portion extending vertically from the center of the disk portion and having a circular outer surface having a diameter smaller than that of the disk portion; It comprises a scart portion that is inclined and disposed in a space between one surface and the circular outer surface of the cylindrical portion, and the force seat portion has a direction substantially parallel to the eclipse line of the cylindrical portion.
  • the inclination angle between the center of the disk and the upper surface of the disk is the angle between the center of the collision surface and the upper surface of the disk.
  • the angle of inclination is approximately equal to the angle of inclination ⁇ and the cushioning surface is near the cylindrical part
  • the feature is to use the diffusion / oscillating rotation dispersion of three-dimensional mesh dog fabric, which has a fan-shaped shape whose width near the disk is wider than the width of the disk.
  • the present inventors have developed a high-speed photographing device tf '(a stobovision ionizer manufactured by Sugawara Laboratories) to elucidate the cause of the non-uniformity existing in this nonwoven fabric.
  • tf a stobovision ionizer manufactured by Sugawara Laboratories
  • the preferred open IS dispersion technology is a high-speed rotation. This method is based on the high-speed production of non-woven fabrics because the method of colliding undistributed three-dimensional mesh fibers against the dispersion plate and dispersing the open fabric is left behind. The method was used.
  • the largest cause of uneven opening of the synthetic fibers in the non-woven sheet by the flash spinning method is the most unusual reason.
  • the three-dimensional filamentary fiber made by the flash spinning method has a continuous three-dimensional net-like structure, it can be easily opened with a slight tension acting on the textile even after it has been opened. It has the property of being focused on a bundle of several millimeters wide.
  • tension is generated in the fabric due to viscous resistance with the surrounding air. This tension has the effect of reducing the width of the expanded three-dimensional braided mesh.
  • the three-dimensional mesh fiber impinged on the rotating dispersing plate when traveling in the spatial region between the rotating dispersing plate and the web collecting surface, changes the swing direction of the three-dimensional mesh fiber.
  • the forward speed toward the Ura collecting surface is reduced, and it falls as if it were floating in space.
  • the three-dimensional mesh fabric had a small opening width, was easily affected by external factors, for example, the surrounding airflow, and was easily converged into a bundle. .
  • the tube including such a bundle portion When the tube including such a bundle portion is made non-woven by appropriate thermal bonding, it has an uneven appearance in which a portion having a high fiber density and a portion having a low fiber density are mixed, and The spots are extremely large.
  • the present inventors have conducted intensive studies in order to obtain uniformity-added ignorance, and have arrived at a manufacturing method belonging to the above-described configuration classification.
  • a diffusing and oscillating dispersion plate in which the oscillating surface constituting the scart portion is substantially flat, and the collision surface is a substantially convex curved surface, and more preferably.
  • the distance between the bottom of the rotating dispersion plate and the open surface of the opened three-dimensional mesh fiber is set to be equal to or less than the distance between the bottom of the rotating dispersion plate and the point where the swing direction of the three-dimensional mesh fiber changes.
  • the three-dimensional net shape refers to the point at which a two-dimensional network fiber that is reciprocated in a direction substantially orthogonal to the axis of the cylindrical portion of the rotation dispersing plate is turned by a change in the direction of movement.
  • the O distance between the lowermost part of the rotating dispersion plate and the collecting surface of the three-dimensional net-like fiber is determined by the amount of solution discharged per spindle of the spinning nozzle and the positional relationship between the spinning nozzle and the rotating dispersion plate. It should be less than the distance between the bottom of the tillage dispersion plate and the swing change point of the net-like debris. Good. Confirmation of ⁇ of this' is, ⁇ serial high-speed image capturing device by 1 Z 3 X 10 5 Extract of the moment de be done by observing with a photograph - kill.
  • the rotating dispersion plate according to the present invention is such that the three-dimensional net-like fiber is guided on the surface of the ura while maintaining the shape of the three-dimensional steel fiber which has been sufficiently widened and opened.
  • the high-speed fluid and the three-dimensional mesh fiber that have been ejected from the nozzle are widened and opened by a fan having the same width regardless of whether they collide with the swinging part or the buffer part in the skirt.
  • the falling speed in the direction is almost constant, and the widened open-woven three-dimensional reticulated steel is guided on the surface of the ura without generating tension to converge it.
  • the fluid ejected from the nozzle scatters in the atmosphere when it collides with the rotating dispersion plate, but most of the fluid conceals leading the three-dimensional mesh fabric to the collection surface.
  • the width of the unwoven woven fabric constituting the nonwoven fabric converged to a fiber density of 40 denier m or more is 5 or more.
  • the distance between the rotational dispersion plate according to the present invention and the rotational dispersion ⁇ the bottom and the opened three-dimensional net-like weir surface is increased by the rotational dispersion ⁇ the oscillation of the bottom part and the three-dimensional net-like fabric.
  • the three-dimensional mesh fiber constituting the nonwoven fabric obtained by combining the setting with the distance not more than the distance between the direction changing point does not include the above-mentioned bundled capital, and the width is not limited. It was almost constant over the entire area of the fabric.
  • Such a uniform nonwoven fabric is not limited in terms of basis weight in terms of the production principle, but is usually useful having an average basis weight of 5 to 500 g Zm 2 (preferably 15 to 300 g).
  • Such a uniform non-woven fabric can be used to expand the range of use as a non-woven fabric of a flash-spun reticulated fiber which has excellent characteristics as a special fiber. Something is immeasurable.
  • a preferred example of the production of the non-woven fabric comprising the three-dimensional mesh fiber of the present invention belonging to the category I will be described in detail with reference to the accompanying drawings.
  • reference numeral 32 denotes a cylindrical projection, which is a part of the three-dimensional reticulated fiber colliding with the skirt part 33 and the high-speed airflow. It serves to prevent blow-up.
  • Reference numeral 3 denotes a disk, which controls the traveling direction of the three-dimensional net-shaped beam deflected by the skirt portion 33.
  • the skirt portion 33 swings the widened open weave three-dimensional net-like fiber for widening and weaving the three-dimensional net-like fibre.
  • the swinging surface 3 4 and the cushioning surface 3 5 are alternately arranged in the scar section 33.
  • 2 to 5 rocking surfaces 34 are arranged.
  • the oscillating surface S 4 is formed substantially in a flat shape, and the collision surface 35 is formed substantially in a convex curved shape.
  • the oscillating surface 34 is substantially flat if the intersection line 37 between the oscillating surface 34 and the disk surface is almost straight as shown in Fig. 14 (a). means.
  • the intersection line 37 ' may be a curved surface having an extremely gentle curvature, that is, a concave surface or a convex surface.
  • the contact surface between the oscillating surface 34 and the cushioning surface 35 is designed so that the shape of the cushioning surface 35 that comes into contact with the disk has a fan shape whose width near the disk is wider than that near the cylinder. It is preferable that an end shape is formed.
  • a buffer surface 35 is substantially convex curved surface, the high seat Y 2 of intersection of the cylindrical portion 3 2 represented by the 1 4 (b) Fig means that the conical curved surface is constant .
  • connection between the rocking surface 34 and the cushioning surface 35 with the side surface of the cylindrical portion 32 and the connection with the upper surface of the disk portion 31 may be made smoothly with a curvature.
  • the width near the disc 31 is wider than the scorpion near the fan.
  • the contact surface 35 has a wedge shape in which the width near the disk portion 31 is narrower than the width near the cylindrical portion 32.
  • the inclination angle is preferably in the range of 30 ° to 60 °, and is selected according to the relationship between the discharge flow rate and the desired tube width.
  • the unspread three-dimensional reticulated fiber 26 ejected from the nozzle 24 together with the high-speed fluid is a rotating dispersion plate provided near the tip of the nozzle 24.
  • the cloth is widened and collides with the scat part 33 to change the traveling direction of the three-dimensional net-like fiber.
  • the three-dimensional reticulated weave oscillating surface 34 and the contact surface 35 constituting the skirt portion 33 are arranged so as to be inclined with respect to the axis of the nozzle 25.
  • the corona discharge device 27 and the like arranged downstream of the rotating dispersion plate immediately after being ejected from the rotating dispersion plate on the widened and opened three-dimensional mesh fiber.
  • the tertiary layer since the silk-like fiber can be uniformly opened and a more uniform non-woven web can be obtained. Since the degree of widening and weaving of the original reticulated fiber is temporally uniform, the state of dispersion by static electricity obtained by the corner discharge device S can be made extremely uniform. Since the three-dimensional network steel can be stably deposited on the surface of the ura collection surface, the turbulence of the web due to the air current on the ura collection surface is suppressed, and the uniformity of the nonwoven web is further improved. be able to.
  • Figures 16 (a) to 16 (d) ⁇ are the high-speed rotating books.
  • the rotating dispersion plate according to the present invention is installed at a distance where the swing change point of the mesh fabric is on the ft collecting surface.
  • 5 is a schematic view of the state of action on a three-dimensional reticulated fiber observed by the high-speed imaging apparatus described above.
  • Rotational dispersion ⁇ was performed at a speed of 10 to 3000 rpm using a Z axis shown in Fig. 15 as the axis of rotation using a 200 W servomotor.
  • the actual HI number of the three-dimensional silk fiber was 300 to 900. Speed.
  • FIG. 16 (a) shows a state in which the three-dimensional netted fabric colliding with the central portion of the oscillating surface 34 is falling almost in the vertical direction while widening on the rotational dispersion.
  • Fig. 16 (b) shows the three-dimensional network that swelled about 50 'from the figure in Fig. 16 (a) and collides with the swinging surface of the rotation dispersion plate. Indicates a state in which the width is widened and falls diagonally to the left on the surface.
  • Fig. 16 (c) is from Fig. 16 (b).
  • Fig. 16 (d) shows that the three-dimensional mesh fiber rotated about 10 ° more than Fig. 16 (c) and collided with the left end of the oscillating surface 34 of the rotating dispersion plate was rotated and dispersed. This shows a state in which it is expanding on the board and falling in the right-upward direction on the drawing. As shown in Fig. 16 (a) to Fig.
  • the three-dimensional mesh fiber that collided with the rotating dispersion plate is widened in a fan-like shape, and the scat section starts from the fiber collision point 39.
  • Intersection line between 3 3 and the upper surface of the disk portion 3 1 (intersection line 37 between the swinging surface 34 and the upper surface of the disk portion 31 or the cushioning surface 35 and the upper surface of the circular portion 3 1 In the direction perpendicular to the intersection line 38), the widening is maintained while maintaining the three-dimensional net-like fiber shape, and is guided along with the fluid onto the ura collection surface 3.6.
  • Figs. 16 (a), 16 (b) and L6 (d) show the falling state of the three-dimensional reticulated fiber after impact on the revolving surface 34 of the rotating dispersion plate.
  • Fig. 16 (c) which shows the falling state of the three-dimensional net-like steel after the collision with the buffer surface 35
  • the widening open state of the three-dimensional net-like fiber is shown on the Ura converging surface 36. It is confirmed that they are almost the same until they are derived.
  • the width of the three-dimensional mesh fiber is increased without changing the position of the collision point, and the traveling three-dimensional mesh fiber is uniformly collected on the collecting surface. Leading to.
  • FIGS. 18 (a) to 18 (d) show wedge-shaped cushioning surfaces disclosed in FIGS. 3 and 4 of US Pat. No. 3,497,918.
  • 16 (a) to 16 (d) are schematic views showing the effect of the rotating dispersion plate on the three-dimensional network fiber by the same method as in FIGS. 16 (a) to 16 (d).
  • FIGS. 18 (a) to I8 (d) correspond to FIGS. 16 (a) to 16 (d) ; ⁇ l, respectively.
  • Fig. 17 (a) II to Fig. 17 (d) show that the rotation dispersion plate according to the present invention was placed at a distance where the swaying change point of the three-dimensional Aboshi steel was above the Ura junction.
  • Fig. 16 (a) to 16 (d) are schematic diagrams showing the effects on the three-dimensional silk-like steel in the same case as those shown in Figs. 16 (a) to 16 (d).
  • FIGS. 17 (a) to 17 (d) correspond to FIGS. I6 (a) to 16 (d), respectively.
  • the three-dimensional reticulated fiber falling after the swing change point is in a floating state with a slow falling speed as shown in the region in the figure.
  • This O floating three-dimensional network ⁇ is, external factors, for example, outside of the influence the susceptibility rather ⁇ degree 4 0 denier / / «Ri by width is small but produces a ⁇ part focused slight tendency of the airflow is there.
  • the screw size is 35 ⁇ in diameter
  • the length / depth of the measuring section is 245 / 1.6.
  • the shape of the damaging part is a multi-thread screw made of steel, the length is 210 mm, the diameter is about 50 ⁇ , the screw used is 16 threads, it has a semicircular groove, the groove depth 3 ; 6 (maximum), the twist angle is .35 ° right.
  • the shape of the pin mixing section is a multi-row array of cylindrical pins, the pin arrangement is 8 ⁇ 17 rows, the size is 285, and the diameter is about 50 °.
  • pins of the same shape are also planted in the same row of 8 i7 rows on the barrel side, as in the case of planting the pins on the axis coaxial with the screw.
  • the movable pin on the same axis as the screw moves between the fixed pins.
  • the polymer and solvent are mixed.
  • the gap between the barrel and the movable pin shaft is 5-1
  • the static mixing element used is a mixer SMX type (nominal diameter 15 TM) manufactured by Sulzer. For example, metal pieces are welded in parallel, and they are connected at an angle of 90 °. This was used in 50 stages.
  • Each mixing unit is provided with a solvent injection port, each of which is connected to a double plunger pump.
  • a spinning device indicated by reference numeral 7 in FIG. 10 was attached to the end of the extruding / dissolving device. ⁇
  • the yarn device is equipped with a filter for filtration and a 0.6-5 L decompression filter.
  • the pressure was 350 kg / ( ⁇ , indicating that the pressure was llOK Z crf at room temperature 19 and therefore the pressure difference before and after the pressure relief was 240 kg Z crf.
  • the conditions were in the liquid phase region, and as a result, a three-dimensional net-like fabric of pure white, which was more highly spun than the spinning nozzle, was discharged.
  • This fiber has a density of 112 d, a specific surface area of 48 niZg, and a long period due to small-angle X-ray scattering.
  • the scattering intensity ratio was 6.
  • the initial modulus was 40.3 g / d and the breaking strength was 9.5 gd in the tensile test with 4 burns of Z cm.
  • the elongation rate at 130 in TMA is 1.5%
  • the dynamic viscoelastic modulus in ⁇ , ⁇ is 1 O: 1 .
  • a dynZcrf temperature 123 ° C the crystal fraction diverging of tan 5: starting temperature of Tsu der Te 127.
  • the orientation angle by X-ray diffraction is 16 °, and the orientation coefficient F by infrared absorption dichroism at a wave number of 201 cm- 1 . 2 ° showed a value of 0.50.
  • Microwave birefringence was 0.149.
  • the tip assembly was equipped with a 0.4 ⁇ 5 TM L decompression orifice, a decompression chamber of about 2 cc, and
  • the spinning nozzle had a hole of 0.5 mm ⁇ 0.5 L and a 3 ma 3 3 mm L of tunnel flares.
  • the pressure in the decompression chamber was 105 kg Z Cm 2 and the temperature was 185 ° C.
  • This fiber had an intensity of 85 d and a specific surface area of 40 crf Zg.
  • the long period due to small-angle X-ray scattering was 168 A, and the scattering intensity ratio due to long period was 7.2. .
  • the temperature in the decompression chamber was -184 ° C, and the pressure was 70 / G.
  • the number of twists was 4 times, and the tensile modulus was 18 g nod and the elongation at break was 4.3 g / d in a tensile test with Z cni.
  • the positions on the phase diagram in the autoclave and the pressure chamber are-the points indicated by points C and D in Fig. 1, respectively. You.
  • the decompression orifice is 0.6 ra ⁇ , 5 TM L
  • the spinning nozzle is 0.5 m ⁇
  • the hole of 0.5 L is 4 ⁇ , 4 mL.
  • a spinner assembly consisting of a Tunnel Flare was used.
  • the knowledge discharged from the spinning nozzle was a pure white continuous three-dimensional reticulated weave with a weave of 106 d.
  • the conditions in the decompression chamber are within one liquid phase region.
  • This fiber has a specific surface area of 38 frf no g: and has an initial modulus of 33 g / (1, breaking strength 7.9 The values of g and d are shown.
  • the small-angle X-ray scattering of this fiber showed that the long period was 175 A and the long period scattering intensity ratio was 15.0.
  • the orientation angle of this fiber by X-ray diffraction is 20 °, and the orientation coefficient F in the infrared. 2 ° was 0.53, indicating high orientation.
  • a homogeneous solution having a polymer concentration of 9.2 wt% was prepared by circling the same apparatus and the same solvent as in Experimental Example 1, and a 0.55 mm and ⁇ mmL dependent pressure orifice was prepared. Flash spinning was carried out using a mouth assembly consisting of a spinning nozzle having a hole of 55 m ⁇ , 0.55 L and a 3 ML. 3 thigh L tunnel tunnel.
  • the solution showed a temperature of 131 ° C and a pressure of '325 kg./oi G, and in a pressurized chamber, the temperature changed to 191 and the pressure changed to 110 ° o4 G, and then spun.
  • the mixture was discharged from the nozzle into the atmospheric pressure to obtain a pure white continuous three-dimensional reticulated fiber with a filth of 101 d.
  • the long period due to small-angle X-ray scattering was 162 A, and the scattering intensity ratio due to the long-term period was 8.4. '
  • X-ray diffraction shows an orientation angle of 13 'and an orientation coefficient F ° of 0.43 due to infrared absorption dichroism at wavenumber 2017 OR-.
  • the number of microwaves is 0.147.
  • the solution pressure is reduced from 210 kg / oi G to 210 kg / oi G.
  • the room pressure is changed to 33 kg Zen! G (decompression room temperature 190) and discharged from the spinning nozzle.
  • This fiber had a specific surface area of 33 m / g .
  • the long period of X-ray small angle scattering was 173, and the ratio of the scattering intensity due to the long period was 19.2.
  • the crystal orientation angle by X-ray diffraction is 27 °, and the infrared orientation coefficient F ⁇ at a wave number of 20 ⁇ 7 cm- '. Is 0.51. Microwave birefringence showed a value of 0.133.
  • the solution pressure of 130 kg / dG dropped to a decompression chamber pressure of 53 kg / G (temperature of 173 ° C) .
  • a continuous three-dimensional with a weave of 157 d was obtained. Reticulated. Weave was obtained.
  • the conditions of the pressure chamber were stirring in the two liquid phase region.
  • This textile has a specific surface area of 18 m 2 / g, an initial modulus of 10.8 g d in a tensile test of 4 times of burning ' ⁇ / on, and a shear strength of 3.8 g d It was only. .
  • the long period was 133 A and the scattering intensity ratio was 52.4.
  • the elongation at 130 by TMA was' 3.6%, and the crystal dispersion starting temperature of tan ⁇ in Viselon at 113 c was inferior in thermal properties.
  • this steel was stretched about twice while twisting 4 cm on a hot plate ripened to 120 V.
  • this hot-stretched fiber had an initial modulus of 19.2 g Zd and a breaking strength of 10.1 g Zd, but the yarn became transparent and the specific surface area decreased to 9.1 of / g. .
  • the long-period in X-ray small-angle scattering was shifted to 235, and the scattering intensity ratio was increased to 90.
  • method A a method using the extruder screw 2 shown in FIG. 6 (hereinafter referred to as method A) and FIG. was A flash-spun at law using an extruder scan click Li Interview first and special mixing structure shown in (called hereinafter A 2 method).
  • the extruder shown in FIG. 5 has a barrel diameter of 35 ⁇ , and the screw used for the method is described using the reference numeral in FIG. 1 6 «TM (9 peaks), groove depth about 5 Compressed section length of code 1 3 245 7 peaks), code 1 40 front quantification section length 1 40 (4 peaks), groove depth 1.6
  • the length of the solvent addition section of symbol 15 is 0 ram (two peaks), the groove depth 3
  • the length of the rear measurement section (mixing / melting part) of symbol 16 is 140 TM (four threads) )
  • the groove depth is 1.6.
  • a screen 'device was attached to the tip of this extruder, and a spinning device was attached via piping.
  • the orifice diameter of the decompression chamber of the spinning device is 0.5 ⁇
  • the volume of the decompression chamber is about 2 cc
  • the diameter of the spinning orifice is 0.5. ⁇
  • the co-feeding of the solvent in the extruder was performed through an inlet 18 using a double-junction pump.
  • the heating temperature of the piping and the spinning device after the tip of the extruder was 175, and the heating temperature of the solvent was 100 ° C. At this time, the liquid temperature immediately before spinning was 175'c, and the pressure in the compression chamber was about 40 NOG. The spinning state is extremely stable, and the pressure fluctuation in the decompression chamber is 45 kg / cm ⁇ G 0
  • the pressure at the tip of the extruder was about 200 kg / cii-G, but no leakage occurred from anywhere.
  • a hollow metal 0 ring was used for the seal of the flange portion, no leakage of the solution occurred. -.
  • the shape of the dal image is a multi-threaded screw structure, the length is 210 »m, the diameter is about 50 thighs, the screw used is 16 threads, it has a semicircular shape, and the groove depth is 3 6 mm (max), right torsion angle
  • the shape of the pin mixing section is a multi-row structure of P3 cylindrical pins, with a length of 285 plates, a diameter of about 50 dragons, and 8 pins and 17 rows if the pins are arranged.
  • pins of the same shape are planted on the barrel side in the same eighteen and seventeen rows, as in the case of planting the pins on the shaft on the same section as the screw.
  • the movable pin on the same surface as the screw moves between the fixed pins, and the polymer and the tether are mixed.
  • Roh barrel and between clearance of the movable pin eclipse is a ⁇ books'. 0.
  • Flash spinning was performed under exactly the same method and conditions as the t method. ⁇ Spinning was extremely stable even when the discharge amount was 1000 g, that is, the polymer flow rate was llO g Z, and the solvent flow rate was 890 g / min. At this time, the pressure in the decompression chamber was 55 kg / crf-G, and the fluctuation range of the pressure was 4 to 5 kgcm ⁇ G.
  • the pressure at the tip of the extruder was about 250 kg / crf'G, and there was no leakage of the agent from anywhere.
  • Example 6 was placed a mixed system consisting of the static mixed-element corresponding to the code 9 of FIG. 9.
  • the static mixing element used was a mixer SMX type manufactured by Sulzer (nominal diameter 15 dragon ⁇ ), in which the metal strips were welded in a cross-girder shape, and they were shifted 90 °. Are linked. This was used in 50 stages.
  • main Le preparative Lee emissions de click scan is 1.2 (weight average molecular weight of about 14 104), high density poly ethylene les emissions (manufactured by Asahi Kasei Corporation Sante click B - 161) and off A polymer solution consisting of lon-111 was used.
  • the temperature of the screw extruder is 230
  • the temperature of the special mixing section of the A3 method is 200 ° c.
  • the temperature of the piping and static mixing section is 175, and the polymer concentration is 11 weight. %.
  • the polymer melted by the extruder reaches the polymer dissolution zone.
  • a solvent is added to this region from a pranjar pump, and the polymer and the solvent are mixed in the special mixing section 8 to dissolve the polymer. Further, the mixed solution reaches the static mixing zone from the extruder tip. During this time, a solvent is further added.
  • This polymer / solvent mixture leads to a static mixture, which is discharged from the outlet as a completely uniform polymer solution for mixing-dissolution.
  • the spinning was carried out using a polymer solution having a polymer concentration of 1 and a solid density of 1.
  • the spinning section was performed at an extruder temperature of 270, a special mixing section temperature of 200, and a static mixing section temperature of 175.
  • the pressure was set to 5 s C.
  • the pressure chamber nozzle was 0.5 mm, the decompression chamber volume was 2 cc, and the spinning nozzle was 0.5 m ⁇ .
  • the mixture was mixed and dissolved at a static mixing unit pressure of 200 kff / oi ⁇ G.
  • the liquid temperature immediately before spinning was 1 to 5.
  • the pressure in the pressure chamber was extremely stable at 80 kg / ⁇ * G.
  • the pressure fluctuation in the pressure chamber was 2-3 / era ⁇ .
  • the solvent flow rate was 623 g Z minute, and the solvent was added directly to the first stage special mixing section.
  • the addition amount in the previous step was 77 g, and the remaining solvent flow rate of 546 g / min was added immediately before the static mixing section in the second stage. Therefore, the first stage has a polymer concentration of 50 wt% and the second stage has a concentration of 11 ⁇ t%.
  • the dissolved state of the polymer corresponds to the pressure change immediately before spinning, especially the pressure change in the decompression chamber. 'In other words, the more the polymer was incompletely dissolved, the greater the pressure fluctuation in the decompression chamber, and finally the spinning became impossible. Even if spinning was possible, undissolved polymer would be ejected if the pressure variation was large, and the fibers were crumpled and the strength was too low to use.
  • the conditions are as follows.
  • the temperature of the extruder screw section was 300: the temperature of the special mixing section connected at the same speed was 200, and the temperature of the piping and the static mixing section was 170.
  • the pressure in the polymer zone is t-, 250 / d-G in the special mixing section, and 20 (Hg / crf'G) in the static mixing section.
  • a gear pump with an extrusion volume of 35 per one-side transfer is installed at the end of the special mixing section.
  • the liquid temperature in the decompression chamber was 110 g / ci'G.
  • the melt index (VII) is 0.35 (weight-average molecular weight, about 21 x 10 high-density polystyrene (Santech HD: B87 manufactured by Asahi Kasei Corporation)
  • the chips of 1) are continuously melt-extruded by an extruder, while Fluorine-11 is added as a solvent by a fixed-quantity pump, and the mixture is extruded and mixed in a special mixing section.
  • the structure of the extruder and the mixing section used at this time are as shown in Fig. 8, and the screw has a screw section, a dam section, and a pin section.
  • Each length was 700 dragons, 210 mm x 250 dragons, and the corresponding barrels were 35 thighs, 50 ⁇ ⁇ , 50 ⁇ , and 'Solvent inlet was provided in the barrel in front of the dalmage.
  • Disk Po Li mer supply amount of Li-menu rotation number 4 6 r P m is 7 4 g Z min, the amount of solvent is injected into the mixer unit was 240 g / min.
  • This mixture was introduced into the static mixing section together with 360 g / min of the solvent to be added to obtain a solution having a predetermined polymer concentration.
  • a static mixing element a mixer S MX type manufactured by Sulza
  • This screw mixer is a mixed arresting mixer with two inlets, with a projection on the 35 mm ⁇ barrel side and a notch in the screw hole.
  • the decompression chamber volume is 3 ⁇ 42 cc
  • a circular assembly of circular nozzle was used.
  • the pressure in the decompression chamber during this fiber spinning was 110 kg / cifi G, and the pressure loss at the decompression orifice, that is, the pressure difference before and after the decompression orifice was 190. / cn! —
  • the pressure in the decompression chamber is 90 kgV ai G
  • the pressure difference before and after the depressurization orifice is 190 kg cii G
  • the filament intensity is 202 d
  • the strength was 3.6 g / d. Also activates liquid! It was measured by the same method as T-kiyoshi 11 and it was confirmed that it was activated. And it was also confirmed that these decompression chamber conditions belonged to one liquid phase.
  • the pressure in the decompression chamber becomes 90 kg ⁇ ⁇ G.
  • a pure white filament of d was obtained. This The filament was a reticulated filament consisting of very fine fibrils with a narrow thread width and seemingly insufficient fibrillation. Activation of the liquid was also observed, confirming that the decompression chamber conditions belonged to one liquid phase.
  • the textile obtained in Experimental Kiyoshi 4 was transferred to a net using a dispersing device S having a rotating deflector and a corona discharge device. Collected on a conveyor. At this time, the three-dimensional reticulated ⁇ yawei discharged from the spinneret was deposited on the net conveyor in a width m of 30 to 60 mm while continuously oscillating from side to side. .
  • the non-adhesive tape was pressed between the entire surface pressure roll (at a temperature of 135) and the rubber port with a linear pressure of 13 kg / cm, once for each of the front and back sides for 10 m / min.
  • the non-woven fabric thus obtained had a specific surface of 8.6 nf / g and 6.0 m / g, respectively, when the inner layer and the surface layer had difficulty.
  • the specific surface area measured as a whole non-woven fabric without separating the layers was 6.4 rr? / G.
  • This nonwoven fabric, basis weight 4 0 g / tensile strength nf the vertical Z ® co is 13.3 / 14.2 (k ff Z 3 cm width), e Leme down Dorf tear strength 1.02Z 1.02 (kg), the reference basis weight 5 this
  • the converted value was a high-strength nonwoven fabric with a tensile strength of 17.3 to 0.7 (kgZ3 oii width) in vertical / horizontal and an elementary tear strength of 1.28Z1.28 (kg).
  • the nonwoven fabric had a bacterial water of 3600 mH 2 O and a Gurley HI air permeability of 900,5 ec 50 mi.
  • the MI and molecular weight distribution of the nonwoven fabric are different from those of the textile.
  • Non-bonded solids obtained by the same method as in Experiment No. 15 were bonded under various conditions using the same press. The bonding was performed once for each of the front and back sides, and the results are shown in Table 2. No. 2
  • non-adhesive non-woven webs were obtained from the three-dimensional steel tube obtained in Experimental Example 1. This non-adhesive nonwoven web was treated on both sides with a vinyl toka render. The ripened drum at 136 was treated at a high speed of 35 m / min to obtain a nonwoven fabric whose surface was ripely bonded. .
  • this non-woven cloth has a laser transmission of 8 ⁇ W at 60 g Z trf and a Gare Hill air permeability of 44 s ec. It is a non-woven city and can be used for envelopes, labels, breathable wrapping materials, and various other paper-based uses.
  • the physical properties of this non-woven fabric are 50 g / nf The tensile strength was reduced to IT ⁇ ⁇ IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT IT
  • Photo 19 (b) is a photomicrograph of a cross section obtained in the same manner as in the case of T y v-ek @C in Comparative Example 5 described below.
  • the three-dimensional silky fissures are more densely packed, despite the similar weight per unit compared to the comparative example.
  • the fibers of the textile are fine. The shows.
  • Comparative Kiyoshi 4-Non-adhesive web was obtained using the textile of Comparative Example 2 in the same manner as in Experimental Example 15 and subjected to the same thermal bonding.
  • the Tyvek ⁇ paper-like type (10 type) was compared with the three-dimensional net-woven nonwoven fabric of the present invention.
  • the specific surface area of the inner layer was less than 5 rrf / g, and the opacity and tensile / tear strength indicated by the amount of transmitted laser light were inferior to those of the fabric of the present invention.
  • the fiber obtained in Experimental Example 4 is moved using a dispersing device having a rotating deflecting plate and a corona discharge device, as shown in Shi 'SP 3,456,156. I gathered on a conveyor. At this time, the three-dimensional reticulated fiber discharged from the spinning nozzle was deposited on the net conveyor while continuously oscillating from side to side with a width of 30 to 60 m.
  • each embossing roll is a square of 0.7 mx 0.7 «in the width and circumferential directions.
  • the pitch of each was 1.25 TM and the emboss depth was 0.3 us.
  • the embossing roll was heated to 132 ° C, and both sides of the front and back were treated by dip- ing with a rubber roll to obtain a patterned, non-adhesive non-woven cloth. Although this cloth was excellent in the friction resistance of the surface, the texture was a little hard, so it was kneaded by hand.
  • This seriously cloth is extremely flexible, has excellent surface friction, and has no fuzz even when strongly rubbing the surface with a finger, and has a very high covering power, protective clothing, simple clothing, Desiccant-suitable as a breathable packaging material, such as a removable material, and other flexible packaging.
  • This nonwoven fabric had a weight of 5 Qg nf and an average amount of transmitted laser light of 14 W.
  • Example 30 The flexibility by the method was 5.25 ⁇ 6.6 ().
  • the non-adhesive non-woven fabric obtained in Experimental Example 29 was treated between the entire surface of the crimping hole and the rubber roll. In this case, only the surface was treated, and the roll temperature was set to 135 and the roll linear pressure was set to 10 kg / cm.
  • the obtained non-woven fabric is a non-woven fabric that has one surface firmly and strongly bonded to the other surface and is not heat-bonded to the other surface and the inner layer.
  • the long-period scattering intensity ratio was 8.5, and the long-period was 180 mm.
  • This non-woven fabric can be used for applications that make use of the difference between the two surfaces. For example, an adsorbent or deodorant is added to the non-adhered surface to make it a filter for adsorption or a deodorant finoletter. Materials (files, woven fabrics, etc.) are bonded together and used as a composite material with high covering power and high tear strength.
  • This O nonwoven fabric has an average transmitted light amount of laser of 5'W at a basis weight of 50 g, and shows extremely high covering power.
  • the physical properties of non-woven fabric vertical / horizontal are as follows: tensile strength is 11.2 11.8 (k / 3 cm width), and Elemendorf tear strength is 1.6-1.6. (kg) and extremely high value.
  • the non-adhesive nonwoven fabric obtained in Experimental Example 29 was subjected to a double-sided treatment using a flute calender.
  • the surface layer was heat-bonded by a high-speed treatment in which the contact with the drum heated for 1 second was performed for 1 second, and a non-woven fabric having a net-like weave shape in the inner layer ⁇ was obtained.
  • the small-angle X-ray scattering of the fiber extracted from the inner layer of this nonwoven fabric has a long-period scattering intensity ratio of 7.0 and a long-period of 230 mm.
  • this nonwoven fabric has a basis weight of 40 g / ⁇ ⁇ ⁇ ⁇ ⁇ and a laser average transmitted light of 8 ⁇ W, has excellent covering power, is a bulky paper-like nonwoven fabric, and is used for envelopes, labels, and other various paper uses. Can be used for
  • tensile strength is 10.8 12-0 (kg / 3 cm width) and Elmendorf tearing strength is high.
  • the steel obtained in Experimental Example 5 was collected as a non-adhesive non-woven fabric in the same manner as in Experimental Example 29, and then a soft non-iron cloth with an embossed pattern was formed.
  • measurement of small-angle X-ray scattering of fibers taken from the inner layer has a long-period scattering intensity ratio of 20 and a long-period of 210 A.
  • This nonwoven fabric has a weight of 50 g / rf and a laser average. The amount of transmitted light was 15'W.
  • the physical properties of the nonwoven fabric length / width are tensile strength of 3-3Z 9.0 (13 ⁇ 43 cm width), single tongue tear strength of 7 / 1.8 (kg), and The degree of flexibility 0 by the lever method was 5.h / 5.0 (cm).
  • the long-period scattering intensity ratio is 6 Q and the long-period is 240 A /
  • This nonwoven fabric had a basis weight of 50 g / m 2 and an average laser transmission light quantity of 20′W, which was inferior to that of Experimental Example 29.
  • This non-woven fabric is a flexible non-woven fabric having an embossed pattern, and as shown in the present invention, retains the form of reticulated iron wire in the inner layer.
  • the long-period scattering intensity ratio was 50 and the long-period was 172 A.
  • the basis weight of the nonwoven fabric was 44 g / m
  • the average amount of transmitted laser light was 22'W
  • the nonwoven fabric was conspicuous and had poor covering power.
  • the physical properties of the nonwoven fabric's vertical / horizontal properties are 7.9 /
  • the single tongue tear strength was 1.4 / 1.6 (kg), and the flexibility by the cantilever method was 6.2 to 6.3 (cm).
  • MI Molelet index 0.71 in fluorocarbon solvent
  • a solution with a concentration of 11 in which polyethylene resin is dissolved is passed through a 0.8 mm diameter and 5 mm long decompression orifice to form an 8 mm diameter and 40 plate long pressure chamber.
  • After pressurizing with a nozzle pass through a nozzle with a nozzle diameter of 0.90 mm and a length of 0.75 mm:
  • Table 5 shows the spinning conditions and yarn properties.
  • FIG. 14 (a) An example of the spun three-dimensional netted steel fiber and gas stream suitable for producing the nonwoven fabric of the present invention arranged perpendicular to the spinneret at a distance of 5 plates in the horizontal direction from the spinneret was supplied to a rotary dispersion plate to produce a nonwoven web.
  • the rotating dispersion plate has three swinging surfaces similar to those shown in Figs. 14 (a) and 14 (b). The dimensions of the rotating dispersion plate are as follows. It is right.
  • the rotating dispersion plate was rotated at an E number of revolutions of 1,000 rpm 2,000 rpm and 3000 rpm. ⁇ The corona discharge was applied to the three-dimensional reticulated fabric that had exited the rotating dispersion to cause the electric charging to increase. Corona discharge was performed by applying a negative DC high voltage of 3 ⁇ 420 kv to electrode needles arranged in a semicircle around a rotating disk with 11 mm pitch and 16 needles.
  • the three-dimensional reticulated fiber can oscillate in a swing cycle three times the rotation speed. While being pendulum-moved, a uniform non-woven tube having a net conveyor vertical effective width of about 30 on was formed with the aid of a suction duct provided below the net conveyor.
  • the state of drop of the open fiber was observed using a high-speed imaging device. confirmed.
  • the speed of the net conveyer is different from that of the
  • the formed non-woven web was subjected to mature pressing once between the front and back sides between a metal roll having a smooth surface 132) and rubber.
  • a laser beam with a power of 5 mW and a beam diameter of 2.5 sm H is irradiated on the non-bonded non-woven fabric by a He-e laser, and the amount of light transmitted through the non-woven fabric is detected by a laser power meter.
  • ⁇ ⁇ Measure continuously in the width direction of the cloth and 10 points in 5 cm length direction.
  • the change in the basis weight in the width direction representing macroscopic unevenness of the nonwoven fabric is within 30%, and the variation in the amount of laser-spot transmitted light in the widthwise direction that causes microscopic unevenness in the nonwoven fabric.
  • the ratio was within 50%, and it was proved that the nonwoven fabric of the present invention was a highly uniform nonwoven fabric. After softening this nonwoven fabric, an independent three-dimensional mesh fiber was collected from the inner layer, and the small-angle X-ray scattering state was examined.
  • the long-period scattering intensity ratio was .11 and the long-period was 1. 80 A.
  • the rotational dispersion was performed under the same conditions as in Experimental Example 33, except that the distance between the bottom and the net conveyor was changed to 320 dragons.
  • the rotation speed of the rotation dispersing plate is 200 ⁇ ⁇ ⁇
  • the net moving speed is 17 mZ
  • the formed web has an effective width of 45 cm.
  • the average basis weight is 39 g / m 2.
  • the three-dimensional reticulated fabric composed of the web with a length of 100 cm was taken out and the width of iron opening was examined. As a result, the average opening width is about 75 dragons, the minimum opening width is 20 m (steel density is 13.5 denier Luno dragon), and the net fiber is 40 denier / width or more. There were no bundles converging to density.
  • the formed nonwoven web was subjected to hot pressing in the same manner as in Experimental Example 33. This was performed once for each of the front and back sides to obtain a nonwoven fabric. _
  • This non-woven fabric was a uniform non-woven fabric with a variation rate of 30% in the width direction and a variation rate of laser-spot transmitted light of 49%, which was sufficient for both macroscopic and microscopic spots.
  • Table 7 shows the uniformity of the obtained nonwoven fabric and the openability of the obtained nonwoven fabric under the same conditions as in Experimental Example 33, except that the rotating dispersion plate was changed to the one having the scar shape shown in Table 7.
  • the rotation speed of the rotation dispersion plate was 3000 rpm, and the net movement speed was constant at 2 Om minutes.
  • the formed web has an effective width of about 3 Qcm and an average batting of 48 g / m
  • the flat steel width was about 70 TM and the minimum fabric width was 5 cm (the fabric density was 54 denier. / Job) contained many bundles of 60 mm in length.
  • This web was made into a nonwoven fabric by hot pressing once on each of the front and back sides as in Experimental Example 33.
  • the nonwoven fabric which deviates from the nonwoven fabric of the present invention has a variation in the basis weight in the width direction expressing macroscopic spots of 30% or more, and transmission of laser spot light expressing microscopic spots.
  • the rate of change in light quantity was more than 50%, which was an uneven ignorance.
  • Cylindrical part diameter C. 1 D 2 — 50 Any ⁇ , g-2, C-3 D 40 iaia
  • Table 8 shows the basis weight and openability of the nonwoven fabric obtained under the same conditions as in Experimental Example 33 except that the rotational dispersion was changed to the one with the scar part shape shown in Table 8. .
  • the rotation speed of the rotation dispersion plate was set to SOOOrpm, and the net moving speed was set to 20 m / min.
  • the density of the fibers in most bundles of the three-dimensional net-woven fabric that forms the obtained web is 40 denier or less, and the density of steel mixed with a very small amount is 40 denier / m.
  • the size of the binding part larger than the width was 5 or less in width and 30 or less in length.
  • This web was hot-pressed once on each of the front and back sides in the same manner as in Experimental Example 33 to obtain a non-woven fabric.
  • the obtained non-woven fabric had a sufficient degree of uniformity.
  • Photo 20 (a) is a photo taken from the top of the nonwoven fabric of E-2 in this experimental example, with light being irradiated from the bottom.
  • Photo 20 (b) is a photograph of Tyvek® B of Comparative Example 5 taken in the same manner.
  • Table 9 shows the spinning conditions and yarn properties.
  • the distance between the bottom of the rotating dispersion plate and the net conveyor is set to 150 TM.
  • the fiber density of most bundles in the opened three-dimensional reticulated fiber constituting the obtained web is less than 40 denier Lunong width, and the fiber density mixed in a very small amount is 40 denier.
  • the size of the bundles over the width of // was also less than 5 mm in width and less than 30 in length.
  • the formed web was subjected to a mature press between the entire surface pressing roll (temperature 130.c) and the rubber call once each on the front and back to make the fabric non-woven.
  • the nonwoven fabric obtained in this manner is an extremely uniform nonwoven fabric having an effective width of 100 cm and a weight variation of 19% in the width direction of 41 Zm and a laser-spot transmission light quantity variation of 40%.
  • the three-dimensional net-like fiber, the non-woven fabric made of the three-dimensional net-like fiber, and the method for producing them according to the present invention have excellent characteristics and applications, respectively, because they are configured as described above. ⁇
  • the explanation will be given in the following order. -
  • the present invention has an advantage as described above, though it is an as-spun iron fiber, so that it is industrially advantageously produced and used. Therefore, it is also expected to be applied to various industrial materials and textiles, which required the strength of fiber and required stretching in the past. '--Book;
  • the continuous fiber nonwoven fabric of the yarn direct connection type using the three-dimensional mesh fiber of Akira is extremely useful, and it is likely that it will be a nonwoven fabric with unprecedented performance.
  • this fiber Due to its strength, whiteness, reticulated structure and high specific surface area, this fiber can be used for various purposes by making it into a nonwoven fabric or using it as a fiber.
  • the size is also large. In addition, 2
  • high-strength fibers can be obtained by spinning at a low temperature, polymer degradation and solvent decomposition are suppressed, stabilizing products and reducing solvent recovery costs.
  • the three-dimensional reticulated fiber non-woven fabric as in the present invention has a large specific surface area and a large mechanical strength (tensile strength and tear strength) based on the mechanical properties and thermal adhesive properties of the fabric that composes it. It is a new nonwoven fabric having This makes it possible to develop unprecedented performance in terms of covering power, uniformity, and mechanical strength, and is preferably applied to a relatively low basis weight area (25 to 70 g / rrf).
  • non-ferrous cloth of the present invention that belong to the classification include envelopes, book covers, wall coverings, house wraps, building materials such as under roof materials, sterile packaging materials, sanitary materials, and filtration performance. It can be used for filters, floppy disk drives, ventilated packaging materials, various bags, recording paper, dust-free paper, difficult paper, impregnated paper, various tapes, materials for FRP, etc.
  • the 12 ⁇ non-woven fabric is a non-woven fabric made of the three-dimensional reticulated fiber according to the present invention, and is a non-iron fabric having high opacity and high covering property, particularly excellent in mechanical strength and ripened mechanical properties.
  • non-woven cloth can be used for protective clothing, safety clothing, sterile clothing, non-dust clothing, moisture-permeable waterproof cloth, s water cloth, stamp cloth, bag, etc.
  • the uniform nonwoven fabric according to the present invention has high uniformity in grooving over the entire effective width and excellent uniformity in appearance. Therefore, this non-woven fabric is extremely useful as a non-woven fabric having a high degree of strength required from the end use of unknowing cloth and a non-woven fabric having high uniformity even with a low basis weight.
  • the method of manufacturing a mesh-like nonwoven fabric using the rotating dispersion plate according to the present invention can provide a web having uniform openness and excellent openability over the complete destruction of the required sheet width. Therefore, the method using the rotational dispersion plate according to the present invention can easily cope with a high degree of uniformity required for the final use of the nonwoven fabric and a low-weight nonwoven fabric of 30 gZ ⁇ f or less.

Abstract

On obtient une fibre réticulée tridimensionnelle de polyéthylène haute densité (26) en acheminant un polymère vers une zone de fusion (partie compression 13, parties dosage 14-16), en réalisant la fusion du polymère au moyen d'une extrudeuse à vis chauffée, en amenant un solvant (CCl3F) au polymère fondu (orifice d'amenée 18), en préparant une solution de polymère par mélange et dissolution de ces derniers sous une pression élevée, et en déchargeant la solution de polymère d'une buse (24), disposée dans la zone de fusion, dans une zone de faible pression. La fibre (26) vient se heurter contre une partie jupe (33) ayant une surface de secouage (34) de la fibre ainsi qu'une surface tampon (35), puis est expansée et ouverte pour obtenir un tissu non tissé. Ce dernier présente d'excellentes propriétés de résistance, de blancheur ainsi qu'une excellente aptitude au recouvrement.
PCT/JP1987/000765 1986-10-13 1987-10-13 Fibre de polyethylene haute densite reticulee, tissu non tisse fabrique avec cette fibre, et leur production WO1988002795A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1019880700670A KR910005573B1 (ko) 1986-10-13 1987-10-13 고밀도 폴리에틸렌 망상섬유, 이 섬유로 구성된 부직포 및 이들의 제조방법
DE3751793T DE3751793T2 (de) 1986-10-13 1987-10-13 Vernetzte polyäthylenfaser hoher dichte und nichtgewobene gewebe daraus sowie deren herstellung
EP87906606A EP0285670B1 (fr) 1986-10-13 1987-10-13 Fibre de polyethylene haute densite reticulee, tissu non tisse fabrique avec cette fibre, et leur production
US08/233,947 US5607636A (en) 1986-10-13 1994-04-28 Process of making plexifilamentary fiber

Applications Claiming Priority (14)

Application Number Priority Date Filing Date Title
JP61/241450 1986-10-13
JP61241450A JPH0772388B2 (ja) 1986-10-13 1986-10-13 不織ウエブ用の回転分散板
JP62/95231 1987-04-20
JP9523187A JPS6350512A (ja) 1986-04-22 1987-04-20 フラツシユ紡糸網状繊維の製造方法
JP62/169682 1987-07-09
JP16968287 1987-07-09
JP62/172073 1987-07-11
JP17207387 1987-07-11
JP62172960A JPS6420366A (en) 1987-07-13 1987-07-13 Uniform nonwoven sheet
JP62/172960 1987-07-13
JP18118987 1987-07-22
JP62/181189 1987-07-22
JP62/211422 1987-08-27
JP21142287 1987-08-27

Publications (1)

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WO1988002795A1 true WO1988002795A1 (fr) 1988-04-21

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EP (1) EP0285670B1 (fr)
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5972147A (en) * 1996-04-23 1999-10-26 E. I. Du Pont De Nemours And Company Method of making fibrous, bonded polyolefin sheet
CN114657701A (zh) * 2022-03-28 2022-06-24 厦门当盛新材料有限公司 一种微波热合闪蒸纺丝无纺布工艺方法、微波热合装置以及无纺布制备设备
CN114687069A (zh) * 2020-12-30 2022-07-01 浙江青昀新材料科技有限公司 一种多功能聚合物无纺布及其织物

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2901756B2 (ja) * 1991-05-10 1999-06-07 イー・アイ・デユポン・ドウ・ヌムール・アンド・カンパニー フラッシュスピニングされたウェブのふちの形成装置
US5286422A (en) * 1991-08-03 1994-02-15 Asahi Kasei Kogyo Kabushiki Kaisha Process for producing three-dimensional fiber using a halogen group solvent
US6179458B1 (en) * 1996-11-01 2001-01-30 E. I. Du Pont De Nemours And Company Forming a solution of fluids having low miscibility and large-scale differences in viscosity
EP1151787B1 (fr) * 1996-11-01 2006-07-19 E.I. Du Pont De Nemours And Company Formation d'une solution de liquides ayant une faible miscibilité et des différences de viscosité à grande échelle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4537733A (en) * 1983-10-31 1985-08-27 E. I. Du Pont De Nemours And Company Nonwoven fiber-sheet process
JPS62184170A (ja) * 1985-12-30 1987-08-12 イー・アイ・デユポン・ドウ・ヌムール・アンド・カンパニー 不織布シ−ト製造装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4537733A (en) * 1983-10-31 1985-08-27 E. I. Du Pont De Nemours And Company Nonwoven fiber-sheet process
JPS62184170A (ja) * 1985-12-30 1987-08-12 イー・アイ・デユポン・ドウ・ヌムール・アンド・カンパニー 不織布シ−ト製造装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5972147A (en) * 1996-04-23 1999-10-26 E. I. Du Pont De Nemours And Company Method of making fibrous, bonded polyolefin sheet
CN114687069A (zh) * 2020-12-30 2022-07-01 浙江青昀新材料科技有限公司 一种多功能聚合物无纺布及其织物
CN114657701A (zh) * 2022-03-28 2022-06-24 厦门当盛新材料有限公司 一种微波热合闪蒸纺丝无纺布工艺方法、微波热合装置以及无纺布制备设备

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EP0285670B1 (fr) 1996-05-01
EP0285670A1 (fr) 1988-10-12
DE3751793D1 (de) 1996-06-05
EP0285670A4 (fr) 1990-01-08
DE3751793T2 (de) 1997-01-09

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