EP3943655B1 - Procédé de fabrication de tissu non-tissé par fusion-soufflage et tissu non-tissé fabriqué par fusion-soufflage - Google Patents

Procédé de fabrication de tissu non-tissé par fusion-soufflage et tissu non-tissé fabriqué par fusion-soufflage Download PDF

Info

Publication number
EP3943655B1
EP3943655B1 EP20782329.5A EP20782329A EP3943655B1 EP 3943655 B1 EP3943655 B1 EP 3943655B1 EP 20782329 A EP20782329 A EP 20782329A EP 3943655 B1 EP3943655 B1 EP 3943655B1
Authority
EP
European Patent Office
Prior art keywords
nonwoven fabric
melt
blown nonwoven
equal
resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20782329.5A
Other languages
German (de)
English (en)
Other versions
EP3943655A4 (fr
EP3943655A1 (fr
Inventor
Kazuya NAGAMINE
Takayuki Miyamoto
Takekazu Maeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kaneka Corp
Original Assignee
Kaneka Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kaneka Corp filed Critical Kaneka Corp
Publication of EP3943655A1 publication Critical patent/EP3943655A1/fr
Publication of EP3943655A4 publication Critical patent/EP3943655A4/fr
Application granted granted Critical
Publication of EP3943655B1 publication Critical patent/EP3943655B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
    • 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
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes
    • D01D4/025—Melt-blowing or solution-blowing dies
    • 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
    • D01D7/00—Collecting the newly-spun products
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
    • 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
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/007—Addition polymers
    • 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
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/009—Condensation or reaction polymers
    • 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

Definitions

  • the present invention relates to a melt-blown nonwoven fabric manufacturing method and a melt-blown nonwoven fabric.
  • a melt-blown nonwoven fabric is manufactured by a so-called melt-blowing method including:
  • Such a method allows for low-cost and easy manufacture of a nonwoven fabric made of microfibers and having a large specific surface area. If unprocessed after being deposited on the conveyor, the melt-blown nonwoven fabric manufactured by the above-described method is insufficient in terms of strength because fiber-to-fiber bonding is weak. The melt-blown nonwoven fabric is therefore used after being strengthened through a heat compression process referred to as calendering using calendering rolls (see, for example, Patent Document 1).
  • Patent Document 2 relates to porous sheets having a moderate air permeability and a soft texture without generating fluffs by rubbing.
  • Patent Document 3 provides a melt-blown fibrous nonwoven web and method of preparing such webs, said web comprising fibers ranging in average fiber diameters to about 2 microns or less, with a narrow fiber diameter distribution, and a high degree of weight uniformity.
  • melt-blown nonwoven fabric becomes less air-permeable through calendering because of compressed surfaces thereof while becoming stronger.
  • Air permeability is an important performance for a melt-blown nonwoven fabric to be used for filter applications and the like.
  • the present invention was achieved in consideration of the above-described problems, and an objective thereof is to provide a melt-blown nonwoven fabric manufacturing method that allows for manufacture of a melt-blown nonwoven fabric having a good strength without performing calendering and to provide a melt-blown nonwoven fabric that can be manufactured by the foregoing manufacturing method.
  • the present invention provides the following (1) to (8).
  • melt-blown nonwoven fabric manufacturing method that allows for manufacture of a melt-blown nonwoven fabric having a good strength without performing calendering and to provide a melt-blown nonwoven fabric that can be manufactured by the foregoing manufacturing method.
  • FIG. 1 illustrates an overview of a melt-blown nonwoven fabric manufacturing device.
  • FIG. 2 is a perspective view illustrating an overview of a spinning die head of the melt-blown nonwoven fabric manufacturing device.
  • the melt-blown nonwoven fabric manufacturing method includes:
  • a molten resin is discharged from the spinning die head 10 having the plurality of nozzle holes 11.
  • Typical methods include a method involving melting a resin fed from a hopper 100 by causing the resin to pass through an extruder 101 and feeding the molten resin to the spinning die head 10 through a kneader 104.
  • the extruder 101 may have a vent structure in a case where a resin that generates residual volatiles is used.
  • the resin is preferably in a solid state. More preferably, the resin is used in the form of pellets.
  • the resin in the form of pellets is generally fed into the extruder 101 through the hopper 100 attached to a material feed port of the extruder 101.
  • the resin is heated and dried before being fed to the extruder 101 in order to prevent or reduce deterioration of the resin due to hydrolysis and oxidation.
  • the resin has a moisture content of less than or equal to 200 mass ppm.
  • Preferable conditions for the drying which depend on the type of the resin, are a temperature of 100°C and a time of three hours or longer.
  • oxygen is removed from an atmosphere in which the resin is dried, and oxygen is removed from the resin.
  • the atmosphere in which the resin is dried is an inert gas atmosphere such as a nitrogen atmosphere.
  • methods that can be suitably employed for the drying in view of the time required for drying and the time for resin consumption include a method involving the use of a hopper dryer obtained by providing the hopper 100 for feeding the pellets to the extruder 101 with a drying mechanism, a method involving drying the resin using a dryer before feeding the resin to the hopper 100 and preventing the resin from absorbing moisture while feeding the resin to the hopper 100, and a method including both the forgoing methods.
  • the method involving the use of the hopper dryer is preferable because this method keeps the resin dried until immediately before the resin is fed to the extruder 101.
  • a dehumidified atmosphere is established to prevent moisture from entering the hopper dryer by providing a dryer upstream of the hopper 100 and quickly drying the resin at a high temperature using the dryer upstream of the hopper 100.
  • heating the resin to an overly high temperature in the hopper 100 can lead to a problem such as blocking.
  • the resin is dried at 120°C for three hours or longer using the dryer provided upstream of the hopper 100, and the inner temperature of the hopper dryer is set to 40°C to 100°C.
  • extrusion stability is easily achieved while also keeping the moisture content of the resin to a low level.
  • the extruder 101 may be, for example, a single-screw extruder including a screw (not shown).
  • a screw As the screw, a vented or unvented extruder screw in a general full-flight configuration having a compression ratio of 2 to 3 may be used. Note that a special kneading mechanism such as a barrier flight may be employed so that no unmelts are left.
  • the molten resin is discharged through each of the nozzle holes 11 of the spinning die head 10 at a resin discharging rate of greater than or equal to 0.006 cm 3 /min and less than or equal to 0.3 cm 3 /min.
  • the discharging rate is a rate of the discharging with respect to each of the nozzle holes 11.
  • the resin is preferably discharged through each of the nozzle holes 11 at a discharging rate of greater than or equal to 0.01 cm 3 /min and less than or equal to 0.2 cm 3 /min, and more preferably greater than or equal to 0.02 cm 3 /min and less than or equal to 0.1 cm 3 /min.
  • the molten resin is discharged while having, at the nozzle holes 11, a temperature greater than or equal to the melting point of the resin and less than or equal to (the melting point + 100°C).
  • Extrusion conditions in the extruder 101 such as a cylinder temperature, a resin residence time, and an extrusion rate, are therefore adjusted so as to satisfy the aforementioned conditions, that is, the discharging rate and the temperature of the resin being discharged.
  • the temperature of the resin at the nozzle holes 11 is preferably greater than or equal to the melting point of the resin and less than or equal to (the melting point + 70°C), in terms of facilitating favorable fiberization of the resin discharged.
  • the molten resin obtained through a melter such as the extruder 101 is preferably fed to the spinning die head using a gear pump 102.
  • the use of the gear pump 102 helps accommodate variation in the discharging rate at the extruder 101, significantly improves stability in volumetric feeding, and stabilizes the discharging of the resin through the nozzle holes 11 of the spinning die head 10.
  • the molten resin is volumetrically fed by the gear pump 102 or is directly fed from the extruder 101 to the spinning die head 10 through, for example, a tubular channel, and then discharged through the plurality of nozzle holes 11 of the spinning die head 10.
  • a foreign matter remover such as a filter 103 is provided in the resin channel from the gear pump 102 to the die or, in a case where the resin does not go through the gear pump 102 or the like, in the resin channel from the melter such as the extruder 101 to the spinning die head 10.
  • the foreign matter remover helps reduce contamination of the nonwoven fabric by foreign matter by trapping foreign matter derived from the raw material resin and trapping foreign matter generated in the extruder and the gear pump 102.
  • Examples of the filter 103 that can be used as the foreign matter remover include screen meshes, pleated filters, and leaf disc filters. Of these filters, leaf disc filters are preferable in terms of filtration accuracy, filtration area, pressure resistance, time to clogging of filter by foreign matter, and the like.
  • Examples of filter media that can be used for the filter 103 include sintered nonwoven fabrics of metal fibers.
  • the molten resin discharged from the gear pump 102 is fed to the spinning die head 10 with or without going through the filter 103.
  • the molten resin is, for example, fed from the gear pump 102 or the filter 103 to the spinning die head 10 through the kneader 104.
  • the molten resin fed to the spinning die head 10 as described above is discharged through the plurality of nozzle holes 11 of the spinning die head 10 as illustrated in FIG. 2 .
  • No particular limitations are placed on the arrangement of the plurality of nozzle holes 11 in the spinning die head 10 as long as the arrangement allows for manufacture of a melt-blown nonwoven fabric 2 having desired properties.
  • the plurality of nozzle holes 11 are arranged in a line at appropriate intervals in the same direction as a width direction of the melt-blown nonwoven fabric 2 to be formed on the conveyor 12 described below.
  • the intervals between the nozzle holes 11 are preferably greater than or equal to 0.10 mm and less than or equal to 1.0 mm, and more preferably greater than or equal to 0.25 mm and less than or equal to 0.75 mm.
  • the intervals between the nozzle holes 11 may be regular or irregular, but are preferably regular in terms of facilitating manufacture of a homogeneous nonwoven fabric.
  • each nozzle hole 11 No particular limitations are placed on the shape of an opening of each nozzle hole 11.
  • the opening is circular, substantially circular, oval, or substantially oval in shape.
  • the opening diameter of each nozzle hole 11 is not particularly limited, and is selected as appropriate according to the fiber diameter of the fibers that form the nonwoven fabric.
  • the resin to be used in the resin discharging step as a material of the melt-blown nonwoven fabric 2 other than being a resin conventionally used as a material of melt-blown nonwoven fabrics.
  • resins include polyolefin-based resins, polystyrene-based resins, (meth)acrylic acid-based resins, polyester-based resins, polyamide-based resins, and polycarbonate-based resins.
  • polyolefin-based resins examples include low density polyethylene, high density polyethylene, polypropylene, ethylene-propylene copolymers, poly(1-butene), and poly(4-methyl-1-pentene).
  • (meth)acrylic acid-based resins include polymers of at least one (meth)acrylate monomer selected from (meth)acrylates such as methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, n-butyl (meth)acrylate, phenyl (meth)acrylate, and benzyl (meth)acrylate.
  • preferable (meth)acrylic acid-based resins examples include polymethyl(meth)acrylate.
  • polyester-based resins include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PNE), and polylactic acid (PLA).
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • PNE polyethylene naphthalate
  • PLA polylactic acid
  • polyamide-based resins include nylon 6, nylon 6,6, nylon 12, nylon 6,12, and MXD nylon.
  • polyolefin-based resins and polyester-based resins are preferable, and polypropylene, polyethylene terephthalate, and polybutylene terephthalate are more preferable.
  • fibers are formed by blowing, toward the nozzle holes 11, hot gas flowing from the nozzle holes 11 toward the conveyor 12 opposed to the spinning die head 10, and thus making the discharged molten resin into fibers.
  • the hot gas blown onto the nozzle holes 11 and the vicinity thereof stretches the molten resin being discharged through the nozzle holes 11, and thus makes the molten resin into fibers. Furthermore, the hot gas flows from the vicinity of the nozzle holes 11 toward the conveyor 12 opposed to the spinning die head 10. The fibers stretched by the hot gas are therefore carried by the flow of the hot gas and deposited on the conveyor 12 to form the melt-blown nonwoven fabric 2 in the subsequent nonwoven fabric formation step.
  • the hot gas can be generated by heating, using a heater (not shown), inert gas such as air or nitrogen pressurized by a compressor (not shown). Furthermore, hot gas flowing in a direction of forward movement of the conveyor 12 and hot gas flowing in an opposite direction to the direction of the forward movement of the conveyor 12 are caused to collide with each other in the vicinity of the nozzle holes 11, so that the directions of the flows of hot gas toward the vicinity of the nozzle holes 11 can be changed to the direction from the nozzle holes 11 toward the conveyor 12.
  • the hot gas has a temperature greater than or equal to the melting point of the resin and less than or equal to (the melting point + 100°C), preferably greater than or equal to (the melting point + 30°C) and less than or equal to (the melting point + 90°C), and more preferably greater than or equal to (the melting point + 40°C) and less than or equal to (the melting point + 80°C).
  • the temperature of the hot gas being within the above-specified range facilitates good stretching of the resin being discharged through the nozzle holes 11 and facilitates good thermal fusion bonding between the fibers on the conveyor 12 in the subsequent nonwoven fabric formation step.
  • the hot gas has a flow rate of greater than or equal to 1000 NL/min/m and less than or equal to 7000 NL/min/m, preferably greater than or equal to 2000 NL/min/m and less than or equal to 6800 NL/min/m, and more preferably greater than or equal to 3000 NL/min/m and less than or equal to 6500 NL/min/m.
  • the flow rate of the hot gas being within the above-specified range facilitates good stretching of the resin being discharged through the nozzle holes 11 and facilitates good thermal fusion bonding between the fibers on the conveyor 12 in the subsequent nonwoven fabric formation step.
  • the fibers are deposited on the conveyor 12 using the flow of the hot gas generated in the fiberization step to form the melt-blown nonwoven fabric 2.
  • the minimum distance between the conveyor 12 and the nozzle holes 11 is set to a range of greater than or equal to 10 mm and less than or equal to 75 mm.
  • the nonwoven fabric formation step is performed under an atmosphere between the conveyor 12 and the nozzle holes 11 set at a temperature of greater than or equal to 110°C and less than or equal to 160°C.
  • the minimum distance between the conveyor 12 and the nozzle holes 11 being within the above-specified range, and the temperature of the atmosphere between the conveyor 12 and the nozzle holes 11 being within the above-specified range allow the thermal fusion bonding performance of the resin fibers on or near a surface of the conveyor 12 to be in a favorable range for achieving formation of a melt-blown nonwoven fabric having good mechanical properties.
  • the uncalendered melt-blown nonwoven fabric has a good air permeability.
  • the space between the conveyor 12 and the nozzle holes 11 may be surrounded by a wall for the purpose of preventing lowering of temperature.
  • Any wall works as long as the wall is capable of preventing outside air from flowing into the space between the conveyor 12 and the nozzle holes 11.
  • the material of such a wall may be a heat-resistant insulation material such as glass wool, rock wool, or porous ceramics.
  • a heater may be provided to heat the space between the conveyor 12 and the nozzle holes 11. In a case where the temperature of the space between the conveyor 12 and the nozzle holes 11 becomes too high due to the temperature of the hot gas and the temperature of the resin, a cooler may be provided to cool the space between the conveyor 12 and the nozzle holes 11.
  • the minimum distance between the conveyor 12 and the nozzle holes 11 is set within a range of greater than or equal to 10 mm and less than or equal to 75 mm as appropriate in consideration of the thickness and the strength of the melt-blown nonwoven fabric. With an increase in the minimum distance between the conveyor 12 and the nozzle holes 11, the thickness of the resulting melt-blown nonwoven fabric 2 tends to increase, and the apparent density and the tensile strength thereof tend to decrease. If the minimum distance between the conveyor 12 and the nozzle holes 11 is greater than 75 mm, the apparent density of the resulting melt-blown nonwoven fabric significantly decreases, and the melt-blown nonwoven fabric cannot maintain a desired strength unless calendering is performed thereon.
  • the temperature of the atmosphere between the conveyor 12 and the nozzle holes 11 is, as described above, greater than or equal to 110°C and less than or equal to 160°C, preferably greater than or equal to 115°C and less than or equal to 155°C, and more preferably greater than or equal to 125°C and less than or equal to 150°C.
  • the temperature of the atmosphere between the conveyor 12 and the nozzle holes 11 is measured in accordance with a method described below.
  • the temperature of the atmosphere between the conveyor 12 and the nozzle holes 11 is measured through thermography at a location two meters away from a front surface (a surface parallel to the width direction of the melt-blown nonwoven fabric 2 to be manufactured) of the spinning die head 10.
  • temperature data are obtained through thermography for 100 pixels equivalent to a 2.5-mm square in actual size at a location approximately right above the nonwoven fabric within a range of ⁇ 250 mm in the width direction from a widthwise central location on the spinning die head 10.
  • An average of the temperature data obtained for the 100 pixels is taken to be the temperature of the atmosphere between the conveyor 12 and the nozzle holes 11.
  • the material of the conveyor 12 is formed from an air-permeable material, and the flow of the hot gas is drawn from a side of the conveyor 12 where the melt-blown nonwoven fabric is formed toward a back side thereof by a suction (not shown).
  • a suction not shown
  • the conveyor 12 is driven by rollers 13 to convey the melt-blown nonwoven fabric 2 formed on the conveyor 12 to a winding device 14.
  • the rate of movement of the conveyor 12 is determined as appropriate in consideration of the apparent density of the melt-blown nonwoven fabric 2 to be obtained in view of the discharging rate of the resin. Typically, the rate of movement of the conveyor is within a range of greater than or equal to 1.5 m/min and less than or equal to 6.0 m/min.
  • the melt-blown nonwoven fabric 2 that has been formed in the nonwoven fabric formation step is wound into roll form by the winding device 14. Note that the melt-blown nonwoven fabric 2 may be cut into predetermined lengths and collected as a product in sheet form instead of in roll form.
  • the method described above makes it possible to manufacture the melt-blown nonwoven fabric 2 having a good strength without performing calendering.
  • various conventional treatments and processes for nonwoven fabrics can be performed on the melt-blown nonwoven fabric 2.
  • calendering is not performed on the melt-blown nonwoven fabric 2 after the nonwoven fabric formation step. This is because calendering reduces the air permeability of the melt-blown nonwoven fabric 2.
  • the surface state of the melt-blown nonwoven fabric 2 manufactured by the melt-blown nonwoven fabric manufacturing method described above differs between a surface thereof that has been in contact with the conveyor 12 and a surface thereof opposite to the surface that has been in contact with the conveyor 12.
  • the ultrasound reflection intensity depends on the elasticity and the density of the surface of the nonwoven fabric.
  • the original melt-blown nonwoven fabric normally has top and bottom sides different from each other. Calendering reduces the difference between the top and bottom sides of the nonwoven fabric, which means that the elasticity and the density are changed at least at one side. This is considered the reason of how calendering reduces the air permeability.
  • the larger one of the reflection intensities is preferably 1.2 times or more and 3.0 times or less the smaller one of the reflection intensities, and more preferably 1.2 times or more and 2.5 times or less the smaller one of the reflection intensities.
  • the melt-blown nonwoven fabric with the ultrasound reflection intensity ratio between the opposite surfaces falling within the above range tends to have high strength and excellent air permeability.
  • the ultrasound reflection intensity is the average of values measured at 100 or more points under the measurement conditions shown below. Note that a gain may be applied to an output signal as necessary if reflected waves are weak.
  • the melt-blown nonwoven fabric satisfying the above-specified reflection intensity ratio preferably has a thickness of greater than or equal to 0.1 mm and less than or equal to 0.4 mm, and more preferably greater than or equal to 0.1 mm and less than or equal to 0.3 mm.
  • the melt-blown nonwoven fabric having a thickness within the above-specified range is readily manufactured in a stable manner, and tends to be formed homogeneous.
  • the melt-blown nonwoven fabric satisfying the above-specified reflection intensity ratio preferably has an apparent density of greater than or equal to 50 kg/m 3 and less than or equal to 350 kg/m 3 , and more preferably greater than or equal to 100 kg/m 3 and less than or equal to 350 kg/m 3 .
  • the melt-blown nonwoven fabric having an apparent density within the above-specified range tends to achieve both a good strength and a good air permeability.
  • the melt-blown nonwoven fabric satisfying the above-specified reflection intensity ratio preferably has an average pore size of greater than or equal to 2.5 um and less than or equal to 5.0 ⁇ m as measured using a permeability porometer, and more preferably greater than or equal to 2.5 um and less than or equal to 4.6 um.
  • the melt-blown nonwoven fabric having an average pore size within the above-specified range tends to achieve both a good air permeability and a good filtration performance.
  • the melt-blown nonwoven fabric satisfying the above-specified reflection intensity ratio preferably has an average fiber diameter of greater than or equal to 0.5 um and less than or equal to 3.0 um, which is an average of values of the diameter of 100 or more fibers as determined based on an electron microscope image, and more preferably greater than or equal to 0.5 ⁇ m and less than or equal to 2.5 ⁇ m.
  • the melt-blown nonwoven fabric satisfying the above-specified reflection intensity ratio preferably has a tensile strength in an MD direction of greater than or equal to 2.0 N/m 2 and less than or equal to 15.0 N/m 2 , and more preferably greater than or equal to 3.0 N/m 2 and less than or equal to 10.0 N/m 2 .
  • the melt-blown nonwoven fabric preferably has a tensile elasticity in the MD direction of greater than or equal to 100 MPa and less than or equal to 400 MPa, and more preferably greater than or equal to 120 MPa and less than or equal to 350 MPa.
  • the melt-blown nonwoven fabric preferably has a tensile strength in a TD direction of greater than or equal to 2.0 N/m 2 and less than or equal to 8.0 N/m 2 , and more preferably greater than or equal to 2.5 N/m 2 and less than or equal to 6.0 N/m 2 .
  • the melt-blown nonwoven fabric preferably has a tensile elasticity in the TD direction of greater than or equal to 50 MPa and less than or equal to 200 MPa, and more preferably greater than or equal to 70 MPa and less than or equal to 130 MPa.
  • the tensile strength and the tensile elasticity are values that are measured in accordance with measurement methods employed for working examples described below.
  • the MD direction refers to a direction along a direction in which the melt-blown nonwoven fabric moves during the manufacture of the melt-blown nonwoven fabric.
  • the TD direction refers to a direction perpendicular to the MD direction.
  • Fiber occupancy in different locations in the melt-blown nonwoven fabric in a thickness direction of the melt-blown nonwoven fabric can be determined by performing an x-ray computed tomography analysis involving scanning the melt-blown nonwoven fabric in the thickness direction of the melt-blown nonwoven fabric and obtaining data of fiber distributions on planes in the melt-blown nonwoven fabric that are perpendicular to the thickness direction, in accordance with a method described below for the working examples.
  • the x-ray computed tomography analysis allows for calculation of an average fiber occupancy FO1 in a range extending across 15% of the thickness from one surface of the melt-blown nonwoven fabric, an average fiber occupancy FO2 in a range extending across 15% of the thickness from the other surface, and an average fiber occupancy AFO across the melt-blown nonwoven fabric.
  • the melt-blown nonwoven fabric having a gradient in fiber occupancy on planes perpendicular to the thickness direction tends to be excellent in air permeability while also being excellent in strength.
  • an occupancy variation rate as calculated in accordance with the following equation is preferably greater than or equal to 10%, more preferably greater than or equal to 12% and less than or equal to 30%, and further preferably greater than or equal to 13% and less than or equal to 25%.
  • the melt-blown nonwoven fabric having an occupancy variation rate within the above-specified range tends to be excellent in air permeability while also being excellent in strength.
  • Occupancy variation rate (%) (
  • the melt-blown nonwoven fabric described above can be readily manufactured by the above-described method.
  • the melt-blown nonwoven fabric described above which achieves both a good strength and a good air permeability, is suitably used for filter applications. More specifically, the melt-blown nonwoven fabric described above is suitably used as a filter for treatments of extracorporeal circulation, purification of antibody drugs, purification of viruses for gene therapy, and the like.
  • melt-blown nonwoven fabrics each having a width of 600 mm were manufactured using a melt-blown nonwoven fabric manufacturing device 1 having a configuration illustrated in FIG. 1 under conditions shown in Table 1.
  • Polyethylene terephthalate (PET, melting point: 260°C) was used as a resin.
  • the rate of movement of the conveyor was 2.9 m/min.
  • calendering was not performed after the melt-blown nonwoven fabric had been manufactured.
  • calendering was performed on the melt-blown nonwoven fabric using calendering rolls at a roll temperature shown in Table 1 under a condition of a roll-to-roll clearance of 0.10 mm to 0.11 mm.
  • a mean flow pore size was measured and taken as the average pore size using a permeability porometer (manufactured by Porous Materials Inc.).
  • each melt-blown nonwoven fabric was used as a sample and was observed by scanning electron microscopy. Based on an electron microscope image obtained, the diameter of 100 or more randomly selected fibers was measured. A number average of 100 or more measured values was calculated as the average fiber diameter. The variation coefficient was determined by dividing a standard deviation of the fiber diameter by the average fiber diameter.
  • the MD direction refers to a direction along the direction in which the melt-blown nonwoven fabric moves during the manufacture of the melt-blown nonwoven fabric.
  • the TD direction refers to a direction perpendicular to the MD direction.
  • a test piece having a width of 8 mm and a length of 40 mm was cut out of each of the melt-blown nonwoven fabrics obtained.
  • a universal testing instrument (RTG-1210, manufactured by A & D Company, Limited) was used. The test piece was fixed at opposite ends thereof using chucks set at an interval of 20 mm, and was pulled at a pulling rate of 20 mm/min.
  • the ultrasound reflection intensity was measured at 100 or more points in an area of 75 mm ⁇ 75 m of each melt-blown nonwoven fabric under the measurement conditions listed below.
  • the ultrasound reflection intensity is defined as the average of the values measured at 100 or more points.
  • the ultrasound reflection intensity was measured for each of a surface that had been in contact with the conveyor 12 during the manufacture of the melt-blown nonwoven fabric and a surface that had been facing toward the nozzle holes 11.
  • ultrasound was transmitted and received by an ultrasonic vibrator (ultrasound transceiver) connected to a pulser/receiver (ULTRA SONIC RECEIVER JPR600C, manufactured by JAPAN PROBE) to measure the ultrasound reflection intensity.
  • the pulser/receiver was connected to a high-speed digitizer (NI PIX-1033 (chassis), NI PIX-5114, manufactured by NATIONAL INSTRUMENTS CORP.), and the high-speed digitizer was connected to a personal computer for data processing.
  • melt-blown nonwoven fabrics obtained in the Examples and the Comparative Examples four sheets or eight sheets of the melt-blown nonwoven fabric were stacked, and 300 mL of air was caused to pass through the stack from an air-permeable surface thereof having an area of 642 mm 2 through application of a weight of 567 g.
  • the time (seconds) required for all of the 300 mL of air to pass through was measured, and thus the air permeability was evaluated.
  • the air permeability was evaluated using a Gurley type densometer (manufactured by Toyo Seiki Seisaku-sho, Ltd. Japan).
  • the sheets of the melt-blown nonwoven fabric were stacked so that surfaces A, which had been in contact with the conveyor 12 during the manufacture of the melt-blown nonwoven fabric, of the melt-blown nonwoven fabric would not make contact with one another, and surfaces B, which had been facing toward the nozzle holes 11, of the melt-blown nonwoven fabric would not make contact with one another.
  • the air was supplied in a direction from the surfaces B.
  • Example 2 and Comparative Example 1 the air permeability of a 32-sheet stack of the melt-blown nonwoven fabric was further evaluated.
  • melt-blown nonwoven fabric of Example 2 Comparison between the melt-blown nonwoven fabric of Example 2 and the melt-blown nonwoven fabric of Comparative Example 2 indicates that the air permeability of the uncalendered melt-blown nonwoven fabric of Example 2 was better than that of the calendered melt-blown nonwoven fabric of Comparative Example 2.
  • Table 4 indicates that the ultrasound reflection intensity ratio between the opposite surfaces of the melt-blown nonwoven fabric of each Example was greater than or equal to 1.2 and less than or equal to 3.0 as a result of the melt-blown nonwoven fabric being uncalendered. Furthermore, Tables 1 to 3 indicate that the melt-blown nonwoven fabric of Comparative Example 1, which was obtained under a condition of a distance of greater than 75 mm between the conveyor and the nozzle holes, had a low apparent density and a relatively low strength.
  • melt-blown nonwoven fabrics were manufactured using the melt-blown nonwoven fabric manufacturing device 1 having the configuration illustrated in FIG. 1 under conditions shown in Table 5.
  • Polypropylene (PP, melting point: 160°C) was used as a resin.
  • the thickness, the apparent density, the average pore size, the average fiber diameter, and the variation coefficient were measured in the same manner as in Example 1.
  • Tables 2 to 6 show results of these measurements.
  • Resin Resin temp. at nozzle holes (°C) Hot gas temp. (°C) Hot gas flow rate (NL/ min./ m) Resin discharging rate (cm 3 / min./ hole) Distance between conveyor and nozzle holes (mm) Temp.
  • Example 5 With respect to each of the melt-blown nonwoven fabrics of Examples 5 and 6, the ultrasound reflection intensity ratio between the opposite surfaces was determined in the same manner as in Example 1 to be greater than or equal to 1.2 and less than or equal to 3.0.
  • the melt-blown nonwoven fabrics of Comparative Examples 8 to 10 which were manufactured under a condition of a distance of greater than 75 mm between the conveyor and the nozzle holes, each resulted in a significantly low apparent density. Consequently, it was impossible to ensure a desired strength for the melt-blown nonwoven fabrics of Comparative Examples 8 to 10 without performing calendering.
  • FIGS. 3 and 4 are graphs showing results of the analysis.
  • a positive side of an axis representing thickness direction ( ⁇ m) corresponds to a direction toward the conveyor-ward surface of each melt-blown nonwoven fabric in the thickness direction of the melt-blown nonwoven fabric.
  • a negative side of the axis corresponds to a direction toward the nozzle-ward surface of each melt-blown nonwoven fabric in the thickness direction of the melt-blown nonwoven fabric.
  • the x-ray computed tomography analysis was performed by a method described below.
  • a micro x-ray computed tomography scanner (MicroXCT-400) manufactured by Xradia was used as an x-ray computed tomography device.
  • Data of fiber distributions in each melt-blown nonwoven fabric was obtained by scanning the melt-blown nonwoven fabric in the thickness direction using the x-ray computed tomography device.
  • Two-dimensional data related to the fiber distributions was obtained at a thickness interval of 0.05 mm from the scan data.
  • images were formed through grayscale processing of the thus obtained two-dimensional data.
  • FIG. 4 shows a grayscale image of a central portion of the melt-blown nonwoven fabric of Example 2 in the thickness direction as an example of the images formed through the grayscale processing.
  • Pixel values were generated from data of the images formed through the grayscale processing. Based on the thus obtained pixel values, predetermined binarization was performed on the grayscale images. With respect to each of the binarized grayscale images, the percentage of the total area of the fibers relative to the entire area of the image (fiber occupancy (%)) was determined.
  • a histogram of a per-luminance (for each of 256 (0 to 255) shades in an 8-bit image) distribution of pixels was obtained based on each image formed through the grayscale processing.
  • the thus obtained histogram in which the horizontal axis represents luminance, had two peaks.
  • a maximum value I max of the luminance, a minimum value I min of the luminance, and an average value ⁇ 0 of the luminance were determined.
  • a value between I max and I min was selected as a threshold T.
  • the histogram was divided into two classes, a class 1 and a class 2, based on the threshold T.
  • the class 1 and the class 2 were to each include one peak.
  • Variance ⁇ 1 2 , mean ⁇ 1 , and frequency n 1 were determined with respect to the class 1.
  • Variance ⁇ 2 2 , mean ⁇ 2 , and frequency n 2 were determined with respect to the class 2.
  • the degree of separation S was determined for each of all possible thresholds T between the maximum value I max and the minimum value I min by the method described above.
  • the threshold T that provides the highest degree of separation S was taken to be the threshold for the banalization.
  • Table 7 shows an average (AFO) of values of the fiber occupancy (%) in different locations in the thickness direction of each melt-blown nonwoven fabric, an average fiber occupancy (FO1) in a range extending across 15% of the thickness from the nozzle hole-ward surface, and an average fiber occupancy (FO2) in a range extending across 15% of the thickness from the conveyor-ward surface, which were determined based on results of the above-described x-ray computed tomography analysis, and a difference (
  • Occupancy variation rate % FO 1 ⁇ FO 2 / AFO ⁇ 100 [Table 7] Fiber occupancy Average fiber occupancy difference between opposite surfaces (%) Occupancy variation rate Average Average fiber occupancy in range extending across 15% of thickness from surface (nozzle hole-ward surface) Average fiber occupancy in range extending across 15% of thickness from surface (conveyor-ward surface) Ex. 2 38.5 31.7 41.1 9.32 24.2 Ex. 4 35.4 30.3 35.3 5.04 14.2 Comp. Ex. 6 50.1 50.7 48.5 2.19 4.4 Comp. Ex. 7 26.3 25.1 27.0 1.92 7.3
  • melt-blown nonwoven fabrics of Examples 2 and 4 that were excellent in air permeability while also being excellent in strength had an occupancy variation rate of no less than 10%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nonwoven Fabrics (AREA)

Claims (10)

  1. Procédé de fabrication d'étoffe non tissée préparée par fusion-soufflage, comprenant :
    une étape de décharge de résine dans laquelle une résine fondue est déchargée depuis une tête de filière dotée d'une buse ayant une pluralité de trous ;
    une étape de formation de fibres dans laquelle des fibres sont formées par insufflation de gaz chaud vers les trous de la buse, et ainsi la résine fondue déchargée est mise sous la forme de fibres, le gaz chaud s'écoulant depuis les trous de la buse en direction d'un convoyeur opposé à la tête de filière ; et
    une étape de formation d'étoffe non tissée dans laquelle une étoffe non tissée préparée par fusion-soufflage est formée par déposition des fibres sur le convoyeur au moyen d'un flux du gaz chaud,
    dans lequel
    un calandrage n'est pas effectué après l'étape de formation d'étoffe non tissée,
    le gaz chaud a une température supérieure ou égale au point de fusion de la résine et inférieure ou égale au point de fusion + 100°C,
    le gaz chaud a un débit supérieur ou égal à 1000 Nl/min/m et inférieur ou égal à 7000 Nl/min/m,
    la résine est déchargée par chacun des trous de la buse à une vitesse de décharge supérieure ou égale à 0,006 cm3/min et inférieure ou égale à 0,3 cm3/min,
    la résine a, au niveau des trous de la buse, une température supérieure ou égale au point de fusion de la résine et inférieure ou égale au point de fusion + 100°C,
    la distance minimale entre le convoyeur et les trous de la buse est supérieure ou égale à 10 mm et inférieure ou égale à 75 mm, et
    l'atmosphère entre le convoyeur et les trous de la buse a une température supérieure ou égale à 110°C et inférieure ou égale à 160°C,
    dans lequel la température de l'atmosphère entre le convoyeur et les trous de la buse est mesurée par thermographie en un emplacement éloigné de deux mètres de la surface avant de la tête de filière, la surface avant étant une surface parallèle à la direction de la largeur de l'étoffe non tissée obtenue par fusion-soufflage.
  2. Procédé de fabrication d'étoffe non tissée préparée par fusion-soufflage selon la revendication 1, dans lequel la résine est une résine à base de polyester ou une résine à base de polyoléfine.
  3. Procédé de fabrication d'étoffe non tissée préparée par fusion-soufflage selon la revendication 1 ou 2, dans lequel l'étoffe non tissée préparée par fusion-soufflage a deux surfaces opposées à partir desquelles des ultrasons sont réfléchis à différentes intensités de réflexion,
    l'une des intensités de réflexion est 1,2 fois ou plus et 3,0 fois ou moins supérieure à une autre des intensités de réflexion, et
    les intensités de réflexion sont chacune une moyenne des valeurs mesurées en 100 points ou plus dans des conditions de mesure comprenant:
    une distance de 155 mm entre un transducteur d'ultrasons et une surface de l'étoffe non tissée ;
    une fréquence de 360 kHz ;
    une température de mesure de 22°C ;
    une tension appliquée de 500 V ;
    un nombre d'ondes de 5 pour des ondes en rafale ;
    un taux de compression d'impulsions de 100 %, et
    100 points de mesure ou plus dans une zone de 25 mm x 40 mm.
  4. Etoffe non tissée préparée par fusion-soufflage obtenue par le procédé selon la revendication 1, ayant deux surfaces opposées à partir desquelles des ultrasons sont réfléchis à différentes intensités de réflexion,
    l'une des intensités de réflexion étant 1,2 fois ou plus et 3,0 fois ou moins supérieure à une autre des intensités de réflexion,
    dans laquelle
    les intensités de réflexion sont chacune une moyenne des valeurs mesurées en 100 points ou plus dans des conditions de mesure comprenant:
    une distance de 155 mm entre un transducteur d'ultrasons et une surface de l'étoffe non tissée ;
    une fréquence de 360 kHz ;
    une température de mesure de 22°C ;
    une tension appliquée de 500 V ;
    un nombre d'ondes de 5 pour des ondes en rafale ;
    un taux de compression d'impulsions de 100 %, et
    100 points de mesure ou plus dans une zone de 25 mm x 40 mm.
  5. Etoffe non tissée préparée par fusion-soufflage selon la revendication 4, ayant une épaisseur supérieure ou égale à 0,1 mm et inférieure ou égale à 0,4 mm.
  6. Etoffe non tissée préparée par fusion-soufflage selon la revendication 4 ou 5, ayant une masse volumique apparente supérieure ou égale à 50 kg/m3 et inférieure ou égale à 350 kg/m3.
  7. Etoffe non tissée préparée par fusion-soufflage selon l'une quelconque des revendications 4 à 6, ayant une grosseur de pore moyenne supérieure ou égale à 2,5 µm et inférieure ou égale à 5,0 µm, telle que mesurée au moyen d'un poromètre à perméabilité.
  8. Etoffe non tissée préparée par fusion-soufflage selon l'une quelconque des revendications 4 à 7, ayant un diamètre de fibre moyen supérieur ou égal à 0,5 µm et inférieure ou égal à 3,0 µm, le diamètre de fibre moyen étant une moyenne de valeurs de diamètre de 100 fibres ou plus, telles que déterminées sur la base d'une image au microscope électronique.
  9. Etoffe non tissée préparée par fusion-soufflage selon la revendication 4, ayant un taux de variation d'occupation supérieur ou égal à 10 %, le taux de variation d'occupation étant calculé à partir de l'occupation de fibre moyenne FO1 dans une plage s'étendant sur 15 % de part et d'autre de l'épaisseur de l'étoffe non tissée préparée par fusion-soufflage à partir d'une surface de celle-ci, de l'occupation de fibre moyenne FO2 dans une plage s'étendant sur 15 % de part et d'autre de l'épaisseur à partir d'une surface opposée, et de l'occupation de fibre moyenne AFO pour toute l'étoffe non tissée préparée par fusion-soufflage, sur la base de l'équation suivante : taux de variation d ′ occupation % = FO 1 − FO 2 / AFO × 100 ,
    Figure imgb0010
     l'occupation de fibre moyenne FO1, l'occupation de fibre moyenne FO2 et l'occupation de fibre moyenne AFO étant déterminées sur la base de résultats d'une analyse tomodensitométrique impliquant le balayage de l'étoffe non tissée préparée par fusion-soufflage dans la direction de l'épaisseur de l'étoffe non tissée préparée par fusion-soufflage et l'obtention de données de distributions des fibres sur des plans dans l'étoffe non tissée préparée par fusion-soufflage perpendiculaires à la direction de l'épaisseur.
  10. Etoffe non tissée préparée par fusion-soufflage selon l'une quelconque des revendications 4 à 8, ayant un taux de variation d'occupation supérieur ou égal à 10 %, le taux de variation d'occupation étant calculé à partir de l'occupation de fibre moyenne FO1 dans une plage s'étendant sur 15 % de part et d'autre de l'épaisseur de l'étoffe non tissée préparée par fusion-soufflage à partir d'une surface de celle-ci, de l'occupation de fibre moyenne FO2 dans une plage s'étendant sur 15 % de part et d'autre de l'épaisseur à partir d'une surface opposée, et de l'occupation de fibre moyenne AFO pour toute l'étoffe non tissée préparée par fusion-soufflage, sur la base de l'équation suivante : taux de variation d ′ occupation % = FO 1 − FO 2 / AFO × 100 ,
    Figure imgb0011
     l'occupation de fibre moyenne FO1, l'occupation de fibre moyenne FO2 et l'occupation de fibre moyenne AFO étant déterminées sur la base de résultats d'une analyse tomodensitométrique impliquant le balayage de l'étoffe non tissée préparée par fusion-soufflage dans la direction de l'épaisseur de l'étoffe non tissée préparée par fusion-soufflage et l'obtention de données de distributions des fibres sur des plans dans l'étoffe non tissée préparée par fusion-soufflage perpendiculaires à la direction de l'épaisseur.
EP20782329.5A 2019-03-29 2020-03-27 Procédé de fabrication de tissu non-tissé par fusion-soufflage et tissu non-tissé fabriqué par fusion-soufflage Active EP3943655B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019068822 2019-03-29
PCT/JP2020/014392 WO2020203932A1 (fr) 2019-03-29 2020-03-27 Procédé de fabrication de tissu non-tissé par fusion-soufflage et tissu non-tissé fabriqué par fusion-soufflage

Publications (3)

Publication Number Publication Date
EP3943655A1 EP3943655A1 (fr) 2022-01-26
EP3943655A4 EP3943655A4 (fr) 2022-06-15
EP3943655B1 true EP3943655B1 (fr) 2023-10-11

Family

ID=72668987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20782329.5A Active EP3943655B1 (fr) 2019-03-29 2020-03-27 Procédé de fabrication de tissu non-tissé par fusion-soufflage et tissu non-tissé fabriqué par fusion-soufflage

Country Status (4)

Country Link
EP (1) EP3943655B1 (fr)
JP (1) JPWO2020203932A1 (fr)
CN (1) CN113950547A (fr)
WO (1) WO2020203932A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022059413A1 (fr) * 2020-09-16 2022-03-24 株式会社カネカ Tissu non tissé calandré et son procédé de production
CN113502602A (zh) * 2021-05-17 2021-10-15 辽宁盛京堂新材料科技有限公司 一种基于抗菌熔喷布的加工装置及其加工工艺
CN114687070A (zh) * 2022-03-15 2022-07-01 安徽金春无纺布股份有限公司 一种熔喷复合无纺布制备装置

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2801063B2 (ja) * 1990-03-12 1998-09-21 三井化学株式会社 穿孔メルトブロー不織布の製造方法及び装置
JPH06136656A (ja) 1992-10-26 1994-05-17 Unitika Ltd ペーパーライク不織布
US5582907A (en) * 1994-07-28 1996-12-10 Pall Corporation Melt-blown fibrous web
JPH08144166A (ja) * 1994-11-21 1996-06-04 Toyobo Co Ltd ポリアミド極細繊維不織布およびその製造法
JP2000238156A (ja) * 1999-02-23 2000-09-05 Toray Ind Inc 積層不織布およびその製造方法ならびに感熱孔版用原紙およびその製造方法
TW565586B (en) * 1999-06-07 2003-12-11 Kuraray Co Porous sheet
WO2005107920A1 (fr) * 2004-05-12 2005-11-17 Ambic Co., Ltd. Matériau pour filtre à air
TW200829323A (en) * 2007-01-05 2008-07-16 jun-jie Chen Manufacturing method of winding type filter in multiple spray-fusing nonwoven fabric
JP6190687B2 (ja) * 2013-10-02 2017-08-30 三井化学株式会社 液体用フィルタ
CN104695135A (zh) * 2013-12-04 2015-06-10 上海杰事杰新材料(集团)股份有限公司 一种可生物降解无纺布及其制备方法
CN107709646B (zh) * 2015-06-30 2021-07-16 株式会社可乐丽 无纺布及其制造方法
CN110709552A (zh) * 2017-06-08 2020-01-17 可乐丽可乐富丽世股份有限公司 纤维结构体、成型体及吸音材料
JP7129984B2 (ja) * 2017-08-10 2022-09-02 株式会社クラレ メルトブローン不織布、それを用いた積層体、メルトブローン不織布の製造方法およびメルトブロー装置

Also Published As

Publication number Publication date
CN113950547A (zh) 2022-01-18
WO2020203932A1 (fr) 2020-10-08
EP3943655A4 (fr) 2022-06-15
JPWO2020203932A1 (fr) 2020-10-08
EP3943655A1 (fr) 2022-01-26

Similar Documents

Publication Publication Date Title
EP3943655B1 (fr) Procédé de fabrication de tissu non-tissé par fusion-soufflage et tissu non-tissé fabriqué par fusion-soufflage
RU2748508C2 (ru) Нетканый материал спанбонд с извитыми тонкими волокнами и улучшенной однородностью
EP3395426A1 (fr) Non-tissé filé-lié pour filtre et procédé de fabrication dudit tissu
TWI580833B (zh) 高膨鬆度之紡黏網
EP1386651B1 (fr) procede d'elaboration de ce materiau filtrant
EP3269860B1 (fr) Étoffe non tissée laminée
EP2792777B1 (fr) Tissu non tissé en fibre mélangée, stratifié, filtre et procédé de production d'un tissu non tissé en fibre mélangée
KR101953662B1 (ko) 해도 섬유, 혼섬사 및 섬유 제품
EP2650419A1 (fr) Etoffe non tissée obtenue par fusion-soufflage, procédé pour sa production et dispositif pour le réaliser
EP1662025A2 (fr) Fibre de polyéthylène à haute ténacité
EP2412857B1 (fr) Procédé de production pour tissu non tissé à filament
EP2985377B1 (fr) Tissu non tissé à fibre mélangée et son procédé de fabrication
WO1994023098A1 (fr) Fibre de polytetrafluoroethylene, materiau cotonneux contenant ladite fibre, et procede de production dudit materiau
EP3187637A1 (fr) Non-tissé de fusion-soufflage et son procédé de fabrication
EP3272922A1 (fr) Tissu non tissé et son procédé de fabrication
EP2899303A1 (fr) Fibre composite de polysulfure de phénylène et étoffe non tissée
EP3351671A1 (fr) Tissu non tissé et filtre à air comprenant celui-ci
Melike et al. Submicron aerosol filtration performance of centrifugally spun nanofibrous polyvinylpyrrolidone media
CN111133142B (zh) 纺粘无纺布
JP7110795B2 (ja) スパンボンド不織布
EP3812027A1 (fr) Tissu non-tissé filé-lié destiné à être utilisé dans des filtres, et son procédé de fabrication
JP2002500282A (ja) 超吸収性繊維の不織ウェブとその製造方法
JP2797482B2 (ja) 均繊度の良好な不織布
JP2005171453A (ja) 牽切紡績糸の製造方法
JP2018202295A (ja) エアフィルター及びその製造方法

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20211022

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

A4 Supplementary search report drawn up and despatched

Effective date: 20220512

RIC1 Information provided on ipc code assigned before grant

Ipc: D04H 1/56 20060101ALI20220506BHEP

Ipc: D04H 3/009 20120101ALI20220506BHEP

Ipc: D04H 3/007 20120101ALI20220506BHEP

Ipc: D01D 5/08 20060101ALI20220506BHEP

Ipc: D04H 3/16 20060101AFI20220506BHEP

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20230202

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20230516

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230726

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602020019170

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20231011

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1620316

Country of ref document: AT

Kind code of ref document: T

Effective date: 20231011

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240211

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240211

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240112

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240111

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240212

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240325

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240111

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231011