WO2021132411A1 - Nontissé filé-lié, milieu filtrant multicouche, milieu filtrant pour filtres plissés et filtre plissé - Google Patents

Nontissé filé-lié, milieu filtrant multicouche, milieu filtrant pour filtres plissés et filtre plissé Download PDF

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Publication number
WO2021132411A1
WO2021132411A1 PCT/JP2020/048314 JP2020048314W WO2021132411A1 WO 2021132411 A1 WO2021132411 A1 WO 2021132411A1 JP 2020048314 W JP2020048314 W JP 2020048314W WO 2021132411 A1 WO2021132411 A1 WO 2021132411A1
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Prior art keywords
woven fabric
filter
melting point
less
polyester
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PCT/JP2020/048314
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English (en)
Japanese (ja)
Inventor
仁 溝上
吉田　潤
幸司 北村
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東レ株式会社
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Priority to JP2021506355A priority Critical patent/JPWO2021132411A1/ja
Publication of WO2021132411A1 publication Critical patent/WO2021132411A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic 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
    • D04H3/009—Condensation or reaction polymers
    • D04H3/011—Polyesters
    • 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
    • D04H3/14—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 yarns or filaments produced by welding
    • D04H3/147—Composite yarns or filaments
    • 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 spunbonded non-woven fabric, a filter laminated filter medium, a filter medium for a pleated filter, and a pleated filter, which are excellent in rigidity, durability, and post-workability.
  • Patent Documents 1 and 2 disclose a high-weight spunbonded non-woven fabric in which thermoplastic continuous filaments are partially fused and integrated.
  • Patent Document 3 discloses a filter base material fused by a metal roll composed of a pair of engraving rolls and a flat roll to a spunbonded nonwoven fabric having a relatively high basis weight.
  • Patent Document 4 describes a spunbonded nonwoven fabric composed of fibers made of a high melting point polymer and composite fibers made of a low melting point polymer and partially fused, and the fibers on the surface layer of the nonwoven fabric are described.
  • non-woven fabrics for filters having a high grain size characterized in that the low melting point polymers are fused or softened to each other by melting or softening.
  • Patent Document 5 when the longitudinal direction of the non-woven fabric is bent into peaks and valleys and pleated to form a filter unit, the fibers constituting the non-woven fabric are oriented along the longitudinal direction to increase the folding resistance. Is disclosed.
  • JP-A-2007-231500 Japanese Unexamined Patent Publication No. 2010-12241 Japanese Unexamined Patent Publication No. 2012-17529 Japanese Unexamined Patent Publication No. 2005-7268 Japanese Unexamined Patent Publication No. 2001-62217
  • an object of the present invention is to provide a spunbonded nonwoven fabric having rigidity and uniformity of basis weight, and also excellent in dust collecting performance and mechanical properties.
  • the present inventors have found a method for obtaining a substrate for a filter by opening a thermoplastic continuous filament by a specific method in the step of forming a fiber web. It was found that the uniformity of the basis weight of the filter substrate can be remarkably improved. Furthermore, it was found that this non-woven fabric makes it possible to achieve both mechanical properties of rigidity and breathability and dust collection performance.
  • the spunbonded nonwoven fabric of the present invention is a spunbonded nonwoven fabric composed of thermoplastic continuous filaments and having a partially fused fusion portion, and the textured CV value of the spunbonded nonwoven fabric is 6.0%.
  • the apparent density is 0.20 g / cm 3 or more and 0.30 g / cm 3 or less
  • the rigidity in the MD direction and / or CD direction is 3 mN or more and 50 mN or less
  • the grain size is 90 g / m 2 or more and 150 g / m 2 or less. is there.
  • the thermoplastic continuous filament has a polyester-based low-melting point polymer having a melting point lower than the melting point of the polyester-based high-melting point polymer around the polyester-based high-melting point polymer. It is a composite type filament arranged.
  • the ratio of the area of the fused portion is 5% or more and 15% or less.
  • the rigidity in the MD direction is 3 mN or more and 20 mN or less, and the ratio of the rigidity in the MD direction / CD direction is 3 or more.
  • the average single fiber diameter of the thermoplastic continuous filament is 8.0 ⁇ m or more and 26.0 ⁇ m or less.
  • the filter laminated filter medium of the present invention is formed by laminating a PTFE film on the spunbonded non-woven fabric.
  • the filter medium for a pleated filter of the present invention comprises the above-mentioned filter laminated filter medium.
  • the pleated filter of the present invention is made by using the above-mentioned filter medium for pleated filter.
  • a spunbonded nonwoven fabric having an excellent balance between dust collection performance and pressure loss, and excellent mechanical strength, high rigidity, and uniform basis weight can be obtained.
  • FIG. 1 is a schematic perspective view showing an example of a filter medium for a dust collector pleated filter of the present invention.
  • FIG. 2 is a diagram for explaining a configuration of a test system for carrying out a collection performance test according to an embodiment of the present invention.
  • the spunbonded nonwoven fabric of the present invention is a spunbonded nonwoven fabric composed of thermoplastic continuous filaments and having a partially fused fusion portion, and the textured CV value of the spunbonded nonwoven fabric is 6.0% or less.
  • the apparent density is 0.20 g / cm 3 or more and 0.30 g / cm 3 or less
  • the rigidity in the MD direction and / or the CD direction is 3 mN or more and 50 mN or less
  • the grain size is 90 g / m 2 or more and 150 g / m 2 or less.
  • polyester is particularly preferably used as the thermoplastic resin used as a raw material for the thermoplastic continuous filament constituting the spunbonded nonwoven fabric of the present invention.
  • Polyester is a polymer polymer obtained by polymerizing an acid component and an alcohol component as monomers.
  • aromatic dicarboxylic acids such as phthalic acid (ortho), isophthalic acid and terephthalic acid, aliphatic dicarboxylic acids such as adipic acid and sebacic acid, and alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid are used. be able to.
  • the alcohol component ethylene glycol, diethylene glycol, polyethylene glycol and the like can be used.
  • polyester examples include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate, polylactic acid, polybutylene succinate, and the like, which will be described later.
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • PTT polytrimethylene terephthalate
  • polyethylene naphthalate polylactic acid
  • polybutylene succinate and the like
  • polyester raw materials include crystal nucleating agents, matting agents, pigments, fungicides, antibacterial agents, flame retardant hydrophilic agents, metal oxides, aliphatic bisamides and / / as long as the effects of the present invention are not impaired.
  • an aliphatic monoamide or the like can be added.
  • metal oxides such as titanium oxide improve spinnability by reducing surface friction of fibers and preventing fusion between fibers, and also increase thermal conductivity during fusion molding by a thermal roll of a non-woven fabric. This has the effect of improving the meltability of the non-woven fabric.
  • aliphatic bisamides such as ethylene bisstearic acid amide and / or alkyl-substituted aliphatic monoamides have the effect of enhancing the releasability between the thermal roll and the non-woven fabric web and improving the transportability.
  • the thermoplastic continuous filament used in the present invention preferably comprises a high melting point component and a low melting point component.
  • the thermoplastic continuous filament is a polyester which is a low melting point component having a melting point of 10 ° C. or more and 140 ° C. or less lower than the melting point of the polyester-based high melting point polymer around the polyester-based high melting point polymer which is a high melting point component.
  • the filament is a composite filament in which a low melting point polymer is arranged.
  • the melting point of the polyester-based low-melting-point polymer in the present invention is 10 ° C. or higher, more preferably 20 ° C. or higher, and further preferably 30 ° C. or higher with respect to the melting point of the polyester-based high-melting point polymer. It is possible to obtain an appropriate fusion property in the above.
  • the heat resistance of the spunbonded non-woven fabric is lowered by lowering the melting point of the polyester-based low melting point polymer to 140 ° C. or lower, more preferably 120 ° C. or lower, still more preferably 100 ° C. or lower than the melting point of the polyester-based high melting point polymer. Can be suppressed.
  • the melting point of the polyester-based high melting point polymer in the present invention is preferably in the range of 200 ° C. or higher and 320 ° C. or lower.
  • the melting point of the polyester-based high melting point polymer is preferably 200 ° C. or higher, more preferably 210 ° C. or higher, and further preferably 220 ° C. or higher.
  • a filter having excellent heat resistance can be obtained.
  • the melting point of the polyester-based high melting point polymer to preferably 320 ° C. or lower, more preferably 300 ° C. or lower, and further preferably 280 ° C. or lower, a large amount of thermal energy for melting during the production of the non-woven fabric is consumed for production. It is possible to suppress the deterioration of the sex.
  • the melting point of the polyester-based low melting point polymer in the present invention is preferably in the range of 160 ° C. or higher and 250 ° C. or lower.
  • a step of applying heat during pleating filter manufacturing such as heat setting during pleating, is performed. Excellent morphological stability even after passing.
  • the melting point of the polyester-based low melting point polymer is preferably 250 ° C. or lower, more preferably 240 ° C. or lower, a filter having excellent meltability during the production of a non-woven fabric and excellent mechanical strength can be obtained.
  • the melting point of the thermoplastic resin is a differential scanning calorimeter (for example, "DSC-2" type manufactured by Perkin Elmer Japan Co., Ltd.), a temperature rise rate of 20 ° C./min, and a measurement temperature range of 30 ° C.
  • the temperature at which an extreme value is given in the obtained melting heat absorption curve is defined as the melting point of the thermoplastic resin.
  • a resin whose melting endothermic curve does not show an extreme value in a differential scanning calorimeter it is heated on a hot plate and the temperature at which the resin is melted by microscopic observation is defined as the melting point.
  • thermoplastic resin is polyester
  • a combination of a pair of polyester-based high-melting point polymer and polyester-based low-melting point polymer (hereinafter, may be described in the order of polyester-based high-melting point polymer / polyester-based low-melting point polymer).
  • examples thereof include combinations of PET / PBT, PET / PTT, PET / polylactic acid, PET / copolymerized PET, and the like.
  • the combination of PET / copolymerized PET is excellent in spinnability. Is preferably used.
  • isophthalic acid copolymerized PET is preferably used because it is particularly excellent in spinnability.
  • Examples of the composite form of the composite filament include concentric sheath type, eccentric sheath type, and sea island type. Among them, the composite form is concentric because the filaments can be fused uniformly and firmly. A core-sheath type is preferable. Further, examples of the cross-sectional shape of the composite filament include a circular cross section, a flat cross section, a polygonal cross section, a multi-leaf cross section, and a hollow cross section. Among them, it is preferable to use a filament having a circular cross section as the cross-sectional shape.
  • the composite filament for example, there is a method of mixing a fiber made of a polyester-based high melting point polymer and a fiber made of a polyester-based low melting point polymer, but in the case of the mixed fiber method, the fibers are uniform. It is difficult to fuse, for example, where fibers made of polyester-based refractory polymer are densely packed, the fusion becomes weak, and the mechanical strength and rigidity are inferior, which makes it unsuitable as a pleated filter.
  • the content ratio of the polyester-based high melting point polymer to the polyester-based low melting point polymer is preferably in the range of 90:10 to 60:40 in terms of mass ratio, and more preferably in the range of 85:15 to 70:30. This is a preferred embodiment.
  • the polyester-based refractory polymer By setting the polyester-based refractory polymer to 60% by mass or more and 90% by mass or less, the rigidity and heat resistance of the spunbonded non-woven fabric can be improved.
  • the polyester-based low melting point polymer is 10% by mass or more and 40% by mass or less to form a spunbonded nonwoven fabric by fusion and used, the composite filaments constituting the spunbonded nonwoven fabric are firmly fused to each other. It has excellent mechanical strength and can withstand the filtration wind speed sufficiently.
  • the average single fiber diameter of the thermoplastic continuous filament constituting the spunbonded nonwoven fabric of the present invention is preferably in the range of 8.0 ⁇ m or more and 26.0 ⁇ m or less.
  • the average single fiber diameter of the thermoplastic continuous filament is preferably 9.0 ⁇ m or more, more preferably 10 ⁇ m or more.
  • the air permeability of the spunbonded non-woven fabric can be improved and the pressure loss can be reduced. .. It is also possible to reduce the number of yarn breaks when forming the thermoplastic continuous filament and improve the stability during production.
  • the average single fiber diameter of the thermoplastic continuous filament is 26.0 ⁇ m or less, preferably 25.0 ⁇ m or less, more preferably 24.0 ⁇ m or less, the uniformity of the spunbonded non-woven fabric is improved and the surface of the non-woven fabric is made dense. It is possible to improve the collection performance, such as making it easier to filter dust on the surface layer. This can extend the life of the filter.
  • the average single fiber diameter ( ⁇ m) of the spunbonded nonwoven fabric is a value obtained by the following method.
  • (I) Randomly collect 10 small piece samples from the spunbonded non-woven fabric.
  • (Ii) Take a photograph of the surface of the collected small piece sample with a scanning electron microscope or the like capable of measuring the fiber thickness in the range of 500 to 2000 times.
  • (Iii) A total of 100 fibers, 10 fibers each, are arbitrarily selected from the photographs taken from each small piece sample, and the thickness thereof is measured. The fiber is assumed to have a circular cross section, and the thickness is the single fiber diameter.
  • (Iv) The value calculated by rounding off the second decimal place of those arithmetic mean values is taken as the average single fiber diameter.
  • the spunbonded nonwoven fabric of the present invention is produced by sequentially performing the following steps (a) to (c).
  • (A) A step of melt-extruding a thermoplastic polymer from a spinneret, and then pulling and drawing the thermoplastic polymer by air soccer to obtain a thermoplastic continuous filament.
  • (B) A step of forming a fiber web by regulating and depositing a fiber arrangement with a fiber-spreading plate on a net conveyor that moves the obtained filament.
  • C A step of partially fusing the obtained fiber web. In the present invention, it is preferable that the steps (a) to (c) are performed and then further processed into a pleated shape.
  • thermoplastic continuous filament forming step First, the thermoplastic polymer is melt-extruded from the spinneret. Then, this is towed and stretched by air soccer to obtain a thermoplastic continuous filament.
  • thermoplastic continuous filament a composite filament in which a polyester-based low-melting-melting polymer having a melting point lower than the melting point of the polyester-based high-melting-melting polymer is arranged around the polyester-based high-melting-melting polymer is used as the thermoplastic continuous filament, there is no case.
  • a polyester-based high-melting point polymer and a polyester-based low-melting-melting polymer are melted at a temperature equal to or higher than the melting point (melting point + 70 ° C.), respectively, and around the polyester-based high-melting-melting polymer to the melting point of the polyester-based high-melting-melting polymer.
  • a composite filament in which a polyester-based low melting point polymer having a low melting point of 10 ° C. or higher and 140 ° C. or lower is arranged after spinning from the pores with a spinning mouthpiece having a base temperature of 10 ° C. or higher and (melting point + 70 ° C.) or lower. , It is towed and stretched at a spinning speed of 4000 m / min or more and 6000 m / min or less by air soccer to spin a thermoplastic continuous filament such as a filament having a circular cross section.
  • the non-woven fabric of the present invention is a so-called spunbonded non-woven fabric, and is a step of forming a fiber web by regulating and depositing a fiber arrangement with a fiber-spreading plate on a net conveyor that moves spun thermoplastic continuous filaments.
  • a net that sucks a thermoplastic continuous filament with an ejector and injects the thermoplastic continuous filament and pressure air (air) from an open fiber plate having a slit shape at the bottom of the ejector to regulate the fiber arrangement and move. It has a step of depositing on a conveyor to obtain a fiber web.
  • the spunbonded non-woven fabric is made of the filament (long fiber). By doing so, the rigidity and mechanical strength can be increased as compared with the case of a non-woven fabric made of short fibers composed of discontinuous fibers, which can be preferable as a pleated filter.
  • the temperature for temporary fusion is preferably 70 ° C. or higher and 120 ° C. or lower lower than the melting point of the polyester-based low melting point polymer. By setting the temperature in this way, the transportability can be improved without excessively fusing the fibers to each other.
  • the linear pressure for temporary fusion is preferably 30 kg / cm or more and 70 kg / cm or less. By setting the linear pressure for temporary fusion to 30 kg / cm or more, more preferably 40 kg / cm or more, it is possible to impart the mechanical strength required for transporting the fiber web to the next step. By setting the linear pressure for temporary fusion to 70 kg / cm or less, more preferably 65 kg / cm or less, excessive fusion between the fibers can be prevented.
  • a step of partially fusing the fiber web is performed.
  • the fused portion of the spunbonded nonwoven fabric is referred to as a fused portion
  • the other non-fused portion is referred to as a non-fused portion.
  • the method of partial fusion is not particularly limited. Fusion by a thermal emboss roll or fusion by a combination of an ultrasonic oscillator and an emboss roll is preferable. In particular, fusion by embossing roll is most preferable from the viewpoint of improving the strength of the non-woven fabric.
  • the temperature of fusion by the thermal embossing roll is preferably 5 ° C. or higher and 60 ° C. or lower lower than the melting point of the polymer having the lowest melting point existing on the fiber surface of the non-woven fabric, and more preferably 10 ° C. or higher and 50 ° C. or lower. Excessive fusion can be prevented by setting the temperature difference between the temperature of fusion by thermal embossing roll and the melting point of the lowest melting point polymer present on the fiber surface of the non-woven fabric to 5 ° C or higher, more preferably 10 ° C or higher. it can. On the other hand, by setting the temperature difference to 60 ° C. or lower, more preferably 50 ° C. or lower, uniform fusion can be performed in the non-woven fabric.
  • the linear pressure for fusion is preferably 30 kg / cm or more and 90 kg / cm or less.
  • the linear pressure for fusion is preferably 30 kg / cm or more, more preferably 40 kg / cm or more, it is possible to impart the strength required for pleating processability to the non-woven fabric when used as a spunbonded non-woven fabric. Excessive fusion can be prevented by setting the linear pressure for fusion to 90 kg / cm or less, more preferably 80 kg / cm or less.
  • the ratio of the area of the fused portion of the spunbonded nonwoven fabric of the present invention (hereinafter, may be simply referred to as the fused area ratio) is the ratio of the fused portion to the total area of the nonwoven fabric, and is the total area of the nonwoven fabric. 5% or more and 15% or less is a preferable range.
  • the fused area ratio is 5% or more, more preferably 6% or more, still more preferably 8% or more, sufficient strength of the non-woven fabric can be obtained, and the surface does not easily fluff.
  • the fused area ratio is 15% or less, more preferably 14% or less, still more preferably 13% or less, the voids between the fibers are reduced, the pressure loss is increased, and the collection performance may be lowered. Absent.
  • a digital microscope for example, "VHX-5000" manufactured by Keyence Co., Ltd.
  • VHX-5000 manufactured by Keyence Co., Ltd.
  • the fused area ratio (%) is calculated by rounding off the first digit after the decimal point as a percentage.
  • the area (cm 2 ) of the fused portion in the rectangular frame is divided by 1.0 cm 2 , which is the area of the rectangular frame, and then the third decimal place is rounded off.
  • the landing area ratio can be calculated.
  • the MD direction refers to the sheet transport direction at the time of manufacturing the spunbonded non-woven fabric, that is, the winding direction in the non-woven fabric roll
  • the CD direction is the sheet transport direction, that is, the winding direction in the non-woven fabric roll. It refers to the direction of vertical intersection.
  • the MD direction and the CD direction are determined by the following procedure.
  • A In the plane of the spunbonded non-woven fabric, an arbitrary direction is determined, and a test piece having a length of 38.1 mm and a width of 25.4 mm is collected along that direction.
  • test piece having a length of 38.1 mm and a width of 25.4 mm is collected in the directions rotated by 30, 60, and 90 degrees from the collecting direction.
  • C The rigidity and softness of each test piece is measured based on the method for measuring the rigidity and softness of the spunbonded non-woven fabric described later for the test pieces in each direction.
  • D The direction in which the value obtained by the measurement is the highest is the MD direction of the spunbonded non-woven fabric, and the direction orthogonal to this is the CD direction.
  • the direction 15 parallel to the ridgeline of the mountain portion 12 is the CD direction.
  • the direction 14 orthogonal to the CD direction is the MD direction.
  • the area of each fused portion is preferably 0.3 mm 2 or more and 5.0 mm 2 or less.
  • the thickness is preferably 0.3 mm 2 or more and 5.0 mm 2 or less.
  • the fused portion forms a recess, and the thermoplastic continuous filaments constituting the non-woven fabric are fused by heat and pressure. That is, the portion where the thermoplastic continuous filaments are fused and aggregated as compared with the other portions is the fused portion.
  • the portion where the thermoplastic continuous filaments are fused and aggregated as compared with the other portions is the fused portion.
  • the portion where the thermoplastic continuous filament is fused and aggregated by the convex portion of the emboss roll becomes the fusion portion.
  • the fused portion is a convex portion of the roll having unevenness and a flat roll.
  • the portion where the thermoplastic continuous filaments of the non-woven fabric are aggregated by being fused with and is composed of a pair of upper rolls and lower rolls in which a plurality of linear grooves arranged in parallel are formed on the surface, and the grooves of the upper roll and the grooves of the lower roll intersect at a certain angle.
  • the fused portion means a portion where the thermoplastic continuous filaments of the non-woven fabric are aggregated by being fused by the convex portion of the upper roll and the convex portion of the lower roll.
  • the portion fused between the upper convex portion and the lower concave portion or the upper concave portion and the lower convex portion is not included in the fusion portion referred to here.
  • the shape of the fused portion in the spunbonded non-woven fabric of the present invention is not particularly specified, and a roll having a predetermined pattern of unevenness is used only on the upper side or the lower side, and a flat roll having no unevenness is used as the other roll. It consists of a pair of upper rolls and lower rolls with multiple parallel linear grooves formed on the case or surface, so that the grooves on the upper roll and the grooves on the lower roll intersect at an angle. Even when the convex portion of the upper roll and the convex portion of the lower roll are fused to each other in the embossed roll provided in the above, the shape of the fused portion is circular, triangular, quadrangular, parallelogram, or elliptical. , Rhombus, etc.
  • the arrangement of these fused portions is not particularly specified, and may be regularly arranged at equal intervals, randomly arranged, or a mixture of different shapes. Among them, from the viewpoint of uniformity of the non-woven fabric, those in which the fused portions are arranged at equal intervals are preferable. Further, in terms of partial fusion without peeling the non-woven fabric, it is composed of a pair of upper rolls and lower rolls in which a plurality of linear grooves arranged in parallel are formed on the surface, and the grooves of the upper rolls are formed. Using an embossed roll provided so as to intersect with the groove of the lower roll at a certain angle, a parallelogram fusion formed by fusing the convex portion of the upper roll and the convex portion of the lower roll. The wearing part is preferable.
  • the spunbonded non-woven fabric of the present invention has a rigidity of 3 mN or more and 50 mN or less in the MD direction and / or the CD direction.
  • the rigidity is 3 mN or more, more preferably 4 mN or more, and further preferably 5 mN or more
  • pleating can be performed while maintaining the strength and shape retention of the non-woven fabric.
  • it is 50 mN or less, preferably 40 mN or less, more preferably 30 mN or less, and further preferably 20 mN or less, the folding resistance during pleating is not large and the unevenness is sharply finished.
  • the rigidity in the present invention is set to 6.7.4 "Gare method (JIS method)" of JIS L1913: 2010 "General non-woven fabric test method” 6.7 “Rigidity and softness (JIS method and ISO method)". According to this, the value obtained by doing the following.
  • the longitudinal direction of the non-woven fabric is the MD direction of the sample.
  • test piece collected so that the longitudinal direction of the sample is the MD direction is used for the measurement of the rigidity in the MD direction
  • the longitudinal direction of the sample is used for the measurement of the stiffness in the CD direction.
  • the rigidity in the present invention may satisfy the above range by either the rigidity in the MD direction or the rigidity in the CD direction, but it is preferable that at least the rigidity in the MD direction satisfies the above range. It is more preferable that both the rigidity in the MD direction and the rigidity in the CD direction satisfy the above ranges.
  • the stiffness of the spunbonded nonwoven fabric of the present invention in the MD direction is preferably 3 mN or more and 20 mN or less. It is more preferably 4 mN or more, still more preferably 5 mN or more. It is preferable to set the above range because the pleated shape retention can be maintained. When it is 20 mN or less, preferably 18 mN or less, more preferably 15 mN or less, the folding resistance at the time of pleating is not large, and the uneven finish state of the pleated shape can be sharpened, which is preferable.
  • the ratio of the rigidity and softness of the spunbonded non-woven fabric of the present invention in the MD direction / CD direction is 3 or more.
  • the pleated shape retention is dominated by the rigidity in the MD direction, which is the folding direction, and the rigidity in the CD direction is not particularly limited, but is 2 mN or more, preferably 3 mN or more, and has a preferable rigidity in the MD direction / CD direction.
  • the ratio is 3 or more, particularly preferably 3.5 or more.
  • the basis weight of the spunbonded non-woven fabric in the present invention is in the range of 90 g / m 2 or more and 150 g / m 2 or less.
  • the basis weight is 90 g / m 2 or more, the rigidity required for pleats can be obtained, which is preferable.
  • the basis weight is 150 g / m 2 or less, preferably 140 g / m 2 or less, more preferably 130 g / m 2 or less, it is possible to suppress an increase in pressure loss when used as a filter, and the life of the filter. Can be lengthened. But it is preferable.
  • the scale referred to here is that three samples with a size of 50 cm in the MD direction and 50 cm in the CD direction are sampled, each mass is measured, and the average value of the obtained values is converted per unit area, and the first decimal point is used. Obtained by rounding off the place.
  • the basis weight CV value of the spunbonded nonwoven fabric of the present invention is 6.0% or less.
  • the basis weight CV value of the spunbonded nonwoven fabric of the present invention is more preferably 5.5% or less, still more preferably 5.0% or less. Within such a range, the non-woven fabric can be made denser as the uniformity of the non-woven fabric is improved, so that the collection efficiency can be easily improved and a satisfactory filter life can be easily obtained, which is preferable. On the other hand, it is more preferable that the basis weight CV value is 1.0% or more in order to secure a certain amount of air permeability of the spunbonded non-woven fabric and reduce the pressure loss to facilitate the life of the filter.
  • the thickness of the spunbonded nonwoven fabric in the present invention is preferably 0.40 mm or more and 0.60 mm or less, and more preferably 0.42 mm or more and 0.58 mm or less.
  • the thickness is preferably 0.40 mm or more and 0.60 mm or less, and more preferably 0.42 mm or more and 0.58 mm or less.
  • the rigidity can be improved and a non-woven fabric suitable for use as a filter can be obtained.
  • a spunbonded nonwoven fabric having excellent handleability and workability as a filter can be obtained.
  • the thickness (mm) of the spunbonded nonwoven fabric adopts a value obtained by measuring by the following method.
  • the apparent density of the spunbonded nonwoven fabric in the present invention is preferably 0.20 g / cm 3 or more and 0.30 g / cm 3 or less.
  • the apparent density is 0.20 or more and 0.30 g / cm 3 or less, the spunbonded non-woven fabric has a dense structure, and dust does not easily enter the inside, and the dust collecting property is excellent.
  • a more preferable range of the apparent density is 0.22 g / cm 3 or more 0.28 g / cm 3 or less.
  • the air permeability per unit grain of the spunbonded non-woven fabric in the present invention is 0.15 ((cm 3 / (cm 2 ⁇ sec)) / (g / m 2 )) or more and 1.00 ((cm 3 / (cm 2))). -Second)) / (g / m 2 )) or less is preferable.
  • the air flow rate per unit is 0.15 ((cm 3 / (cm 2 ⁇ s)) / (g / m 2 )) or more, preferably 0.20 ((cm 3 / (cm 2 ⁇ s))). When it is / (g / m 2 )) or more, it is possible to suppress an increase in pressure loss.
  • the air flow rate per unit is 1.00 ((cm 3 / (cm 2 ⁇ sec)) / (g / m 2 )) or less, preferably 0.90 ((cm 3 / (cm 2 ⁇ sec)). )) / (G / m 2 )) or less, the dust is less likely to stay inside, and the dust collection property is good.
  • the air permeability per unit grain of the spunbonded non-woven fabric ((cm 3 / (cm 2 ⁇ sec)) / (g / m 2 )) is as follows: JIS L1913: 2010 “General non-woven fabric test method” 6.8 "Breathability (JIS method)” 6.8.1 "Frazil method” The value obtained by dividing the value measured by the above-mentioned scale is adopted. (I) Collect 10 test pieces of 150 mm ⁇ 150 mm at equal intervals in the CD direction of the spunbonded non-woven fabric.
  • the tensile strength in the MD direction per unit basis weight of the spunbonded nonwoven fabric of the present invention (hereinafter, may be referred to as MD tensile strength per unit basis weight) is 3.8 (N / 5 cm) / (g / m 2). ) Or more, more preferably 4.0. It is (N / 5 cm) / (g / m 2 ) or more.
  • the tensile strength in the CD direction per unit basis weight (hereinafter, may be referred to as CD tensile strength per unit basis weight) must be 2.0 (N / 5 cm) / (g / m 2 ) or more.
  • the tensile strength of the spunbonded non-woven fabric is as follows: JIS L 1913: 2010 "General non-woven fabric test method” 6.3 “Tensile strength and elongation (ISO method)" 6.3.1 "Standard time” The value obtained by dividing the value measured based on the above by the above-mentioned scale is adopted.
  • (I) Collect 3 test pieces of 30 cm ⁇ 5 cm with the long side in the MD direction at equal intervals in the MD direction per 1 m.
  • Three 30 cm ⁇ 5 cm test pieces with the long side in the CD direction are collected at equal intervals in the MD direction at 3 points per 1 m.
  • the spunbonded non-woven fabric of the present invention has excellent rigidity, basis weight uniformity, air permeability, collection performance and mechanical properties, and is therefore used for intake filter applications for gas turbines. It is preferably used as a filter material for an intake filter filter used for a liquid filter application such as a dust collector filter or an electric discharge machine, and for purifying intake air of a gas turbine or an automobile engine.
  • the filter medium for a filter can be obtained, for example, by laminating the above-mentioned spunbonded non-woven fabric with a substrate made of a PTFE film or nanofibers. Further, the filter medium for a pleated filter of the present invention can be obtained by forming a filter laminated filter medium and then pleating it to form a pleated shape.
  • the upper end and the lower end of the cylinder can be fixed to form a cylindrical pleated filter, or the end portion of the filter medium for the pleated filter is made of a metal material. It can be a panel type pleated filter fixed to the inner wall of a frame material such as a square type or a round type made of a polymer resin material.
  • ⁇ is the viscosity of the polymer solution
  • ⁇ 0 is the viscosity of orthochlorophenol
  • t is the drop time of the solution (seconds)
  • d is the density of the solution (g / cm 3 )
  • t 0 is the drop of orthochlorophenol.
  • Time (seconds) and d 0 represent the density of orthochlorophenol (g / cm 3 ), respectively.
  • the intrinsic viscosity (IV) was calculated from the relative viscosity ⁇ r by the following formula.
  • -Intrinsic viscosity (IV) 0.0242 ⁇ r +0.2634
  • Thickness of spunbonded non-woven fabric As the thickness gauge, "TECLOCK” (registered trademark) SM-114 manufactured by Teklock Co., Ltd. was used. (4) Apparent density of the non-woven fabric The apparent density of the spunbonded non-woven fabric was calculated by the above method. (5) Aeration rate of spunbonded non-woven fabric (cm 3 / (cm 2 seconds)) The air volume was measured using a breathability tester "FX3300-III” manufactured by Swiss Textest. (6) Rigidity and softness (mN) of spunbonded non-woven fabric Rigidity and softness were measured using a Gale / flexibility tester "GAS-10" manufactured by Daiei Seiki Seisakusho Co., Ltd.
  • Tension strength of spunbonded non-woven fabric (N / 5 cm) As a constant speed extension type tensile tester, Tensilon "RTC-1250A” manufactured by Toyo Baldwin Co., Ltd. was used. (8) Percentage of the area of the fused portion of the spunbonded non-woven fabric (%) A KEYENCE digital microscope "VHX-5000" was used to measure the ratio of the fused area of the spunbonded non-woven fabric.
  • FIG. 2 is a diagram for explaining a configuration of a test system for carrying out a collection performance test according to an embodiment of the present invention.
  • the test system 21 shown in FIG. 2 includes a sample holder 22 for setting a test sample M, a flow meter 23, a flow rate adjusting valve 24, a blower 25, a dust supply device 26, a switching cock 27, and a particle counter 28. To be equipped.
  • the flow meter 23, the flow rate adjusting valve 24, the blower 25, and the dust supply device 26 are connected to the sample holder 22.
  • the flow meter 23 is connected to the blower 25 via a flow rate adjusting valve 24. Dust is supplied to the sample holder 22 from the dust supply device 26 by the intake air of the blower 25.
  • a particle counter 28 is connected to the sample holder 22, and the number of dusts on the upstream side and the number of dusts on the downstream side of the test sample M can be measured via the switching cock 27, respectively.
  • a polystyrene 0.309U 10 wt% solution manufactured by Nacalai Tesque, Inc.
  • the air volume is adjusted by the flow rate adjusting valve 24 so that the filter passing speed is 3.0 m / min, and the dust concentration is 20,000 to 70,000 / (2.83 ⁇ 10 -4 m 3 (0.01 ft 3 )).
  • the number of dust upstream and the number of dust downstream of the test sample M were measured with a particle counter 28 (manufactured by Rion Co., Ltd., KC-01D) in the range of dust particle size of 0.3 to 0.5 ⁇ m. ..
  • the obtained value was substituted into the following formula, and the first decimal place of the calculated value was rounded off to obtain the collection performance (%).
  • Collection performance (%) [1- (D1 / D2)] x 100
  • D1 the number of dusts downstream (total of 3 times)
  • D2 the number of dusts upstream (total of 3 times).
  • Pleat workability (points) of spunbonded non-woven fabric (1) The spunbonded nonwoven fabric is cut to a width of 240 mm, and while the spunbonded nonwoven fabric is heated to 150 ° C. and compressed, the distance from the ridgeline of the apex of the pleated molded product to the ridgeline of the next apex becomes 35 mm. It was pleated in this way to obtain a pleated molded product.
  • This pleated molded product is wound around a porous cylindrical core made of polypropylene by 45 threads, the ends of the pleated molded product are heat-sealed, and then caps made by injection molding are fused to both ends on the cylindrical shape. A pleated filter was prepared.
  • -Polyester resin A Polyethylene terephthalate (PET) dried to a moisture content of 50 mass ppm or less, having an intrinsic viscosity (IV) of 0.65 and a melting point of 260 ° C.
  • Polyester resin B Copolymerized polyethylene terephthalate (CO-PET) dried to a moisture content of 50 mass ppm or less, having an intrinsic viscosity (IV) of 0.64, an isophthalic acid copolymerization rate of 11 mol%, and a melting point of 230 ° C.
  • a filament having a circular cross-sectional shape is spun at a speed of 4900 m / min, and the fiber arrangement is regulated and deposited by an open fiber plate having a slit on a moving net conveyor to form a fiber web composed of fibers having an average single fiber diameter of 14.8 ⁇ m. Collected.
  • the collected fiber webs were tentatively fused to the collected fiber webs by a calendar roll composed of a pair of flat rolls under the conditions of a temperature of 140 ° C. and a linear pressure of 50 kg / cm. Subsequently, an embossed roll composed of a pair of engraving rolls having a fused area ratio of 10% and an area of 1.6 mm 2 per fused portion was used, and the temperatures of the upper and lower embossed rolls were both set to 200 ° C. to make the fibers. The fibers were fused under the condition that the linear pressure applied to the web was 70 kg / cm to obtain a spunbonded non-woven fabric having a grain size of 130 g / m 2.
  • the apparent density of the obtained spunbonded non-woven fabric is 0.25 g / cm 3 , the air flow rate is 45 cm 3 / (cm 2 ⁇ sec), and the air flow rate per grain is 0.35 (cm 3 / (cm 2 ⁇ sec)).
  • the stiffness in the MD direction is 10.2 mN
  • the stiffness in the CD direction is 2.3 mN
  • the ratio of the stiffness in the MD direction / CD direction is 4.4. The value was 3.6%.
  • Table 1 The results are shown in Table 1.
  • Example 2 Under the same conditions as in Example 1, the basis weight was 150 g / m, except that the spinning speed was changed so that the average single fiber diameter was 14.4 ⁇ m and the speed of the net conveyor was changed to make the basis weight 150 g / m 2.
  • a spunbonded non-woven fabric of m 2 was obtained. The apparent density of the obtained spunbonded non-woven fabric is 0.28 g / cm 3 , the air flow rate is 35 cm 3 / (cm 2 ⁇ sec), and the air flow rate per grain is 0.23 (cm 3 / (cm 2 ⁇ sec)).
  • MD direction stiffness is 13.3 mN
  • CD direction stiffness is 3.4 mN
  • stiffness is MD direction / CD direction ratio is 3.9
  • grain CV value is 3. It was 0.4%.
  • Example 3 Except that the basis weight by adjusting the speed of the net conveyor was changed to 120 g / m 2, under the same conditions as in Example 1, the average single fiber diameter of fibers of 14.8Myuemu, basis weight of 120 g / m 2 Span A bonded non-woven fabric was obtained.
  • the apparent density of the obtained spunbonded non-woven fabric is 0.24 g / cm 3 , the air volume is 55 cm 3 / (cm 2 seconds), and the air permeability per grain is 0.46 (cm 3 / (cm 2 seconds)).
  • MD direction stiffness is 7.1 mN
  • CD direction stiffness is 2.0 mN
  • stiffness is MD direction / CD direction ratio is 3.6
  • grain CV value is 3. It was 8.8%. The results are shown in Table 1.
  • Example 4 Except that the basis weight by adjusting the speed of the net conveyor was changed to 100 g / m 2, under the same conditions as in Example 1, the average single fiber diameter of fibers of 14.8Myuemu, basis weight of 100 g / m 2 Span A bonded non-woven fabric was obtained.
  • the apparent density of the obtained spunbonded non-woven fabric is 0.22 g / cm 3
  • the air flow rate is 70 cm 3 / (cm 2 ⁇ sec)
  • the air flow rate per grain is 0.70 (cm 3 / (cm 2 ⁇ sec)).
  • MD direction stiffness is 6.3 mN
  • CD direction stiffness is 1.1 mN
  • stiffness is MD direction / CD direction ratio is 5.7
  • grain CV value is 4. It was .2%. The results are shown in Table 1.
  • Example 5 Under the same conditions as in Example 1, the basis weight was 150 g / m, except that the spinning speed was changed so that the average single fiber diameter was 10.1 ⁇ m and the speed of the net conveyor was changed to make the basis weight 150 g / m 2.
  • a spunbonded non-woven fabric of m 2 was obtained. The apparent density of the obtained spunbonded non-woven fabric is 0.29 g / cm 3 , the air flow rate is 30 cm 3 / (cm 2 ⁇ sec), and the air flow rate per grain is 0.20 (cm 3 / (cm 2 ⁇ sec)).
  • MD direction stiffness is 6.6 mN
  • CD direction stiffness is 2.1 mN
  • stiffness is MD direction / CD direction ratio 3.1
  • grain CV value is 3. It was .1%. The results are shown in Table 1.
  • the characteristics of the obtained non-woven fabric are as shown in Table 1, and all of the spunbonded non-woven fabrics of Examples 1 to 5 have a rigidity of 5 mN or more in the MD direction and a ratio of the rigidity in the MD direction / CD direction.
  • the value was 3.5 or more
  • the CV value of the texture was 4.5% or less
  • the rigidity and the uniformity of the texture were excellent
  • the spunbonded non-woven fabric showed good characteristics.
  • the collection efficiency was 29% or more and the pressure loss was 20 Pa or less, both of which were good.
  • an embossed roll composed of a pair of engraving rolls having a fused area ratio of 18% and an area of 0.7 mm 2 per fused portion, under the conditions of a temperature of 200 ° C. and a linear pressure of 60 kg / cm.
  • a spunbonded non-woven fabric having a grain size of 130 g / m 2 was obtained, which consisted of fibers having an average single fiber diameter of 16.5 ⁇ m.
  • the apparent density of the obtained spunbonded non-woven fabric is 0.32 g / cm 3 , the air flow rate is 35 cm 3 / (cm 2 ⁇ sec), and the air flow rate per grain is 0.27 (cm 3 / (cm 2 ⁇ sec)).
  • MD direction stiffness is 5.4 mN
  • CD direction stiffness is 1.9 mN
  • stiffness is MD direction / CD direction ratio is 2.8
  • grain CV value is 6. It was 8.8%. The results are shown in Table 2.
  • MD direction stiffness is 2.6 mN
  • CD direction stiffness is 1.0 mN
  • stiffness is MD direction / CD direction ratio is 2.6
  • grain CV value is 7. It was 0.4%.
  • a filament having a circular cross-sectional shape is spun at a speed of 4900 m / min, and the fiber arrangement is regulated and deposited by an open fiber plate having a slit on a moving net conveyor to form a fiber web composed of fibers having an average single fiber diameter of 12.8 ⁇ m. Collected.
  • Embossed rolls and flat rolls made of engraving rolls are used for the collected fiber webs, and the upper and lower embossed rolls and flat rolls are fused at 170 ° C and the linear pressure applied to the fiber webs is 70 kg / cm.
  • the spunbonded non-woven fabric having an area ratio of 16% and an area of 0.7 mm 2 per fused portion was fused to obtain a spunbonded non-woven fabric having a grain size of 130 g / m 2.
  • the apparent density of the obtained spunbonded non-woven fabric is 0.34 g / cm 3 , the air flow rate is 21 cm 3 / (cm 2 ⁇ sec), and the air flow rate per grain is 0.18 (cm 3 / (cm 2 ⁇ sec)).
  • MD direction stiffness is 4.0 mN
  • CD direction stiffness is 1.6 mN
  • stiffness is MD direction / CD direction ratio is 2.5
  • grain CV value is 3. It was .2%. The results are shown in Table 2.
  • an embossed roll composed of a pair of engraving rolls having a fused area ratio of 10% and an area of 1.6 mm 2 per fused portion, under the conditions of a temperature of 200 ° C. and a linear pressure of 60 kg / cm.
  • a spunbonded non-woven fabric having a grain size of 130 g / m 2 was obtained, which consisted of fibers having an average single fiber diameter of 16.5 ⁇ m.
  • the apparent density of the obtained spunbonded non-woven fabric is 0.25 g / cm 3 , the air flow rate is 55 cm 3 / (cm 2 ⁇ sec), and the air flow rate per grain is 0.42 (cm 3 / (cm 2 ⁇ sec)).
  • MD direction stiffness is 7.0 mN
  • CD direction stiffness is 2.6 mN
  • stiffness is MD direction / CD direction ratio 2.7
  • grain CV value is 6. It was 9.9%. The results are shown in Table 2.
  • the basis weight is 120 g / m 2 composed of fibers having an average single fiber diameter of 14.8 ⁇ m under the same conditions as in Example 3 except that the clearance between the embossed roll and the flat roll is adjusted to reduce the thickness of the non-woven fabric.
  • Spunbonded non-woven fabric was obtained.
  • the apparent density of the obtained spunbonded non-woven fabric is 0.31 g / cm 3
  • the air flow rate is 42 cm 3 / (cm 2 ⁇ sec)
  • the air flow rate per grain is 0.35 (cm 3 / (cm 2 ⁇ sec)).
  • MD direction stiffness is 6.1 mN
  • CD direction stiffness is 2.2 mN
  • stiffness is MD direction / CD direction ratio is 2.8
  • grain CV value is 3. It was 9.9%. The results are shown in Table 2.
  • Comparative Examples 1 and 2 have the same basis weight as Examples 1 and 4, they are easily clogged with dust and have a high pressure loss. Therefore, the collection efficiency was also inferior, and the basis weight uniformity was also inferior. In addition, in Comparative Example 2, the rigidity and softness were low, and the pleating workability was also inferior. Further, in Comparative Example 3, the diameter of the single fiber was narrowed, and the uniformity of the basis weight was superior, but the density was high, so that the air flow rate was low, the pressure loss was high, and it was inferior.
  • Comparative Example 4 the fused area ratio of Comparative Example 1 was 10%, the area per fused portion was 1.6 mm 2, and the density was as low as that of Example 1, but the basis weight CV value was inferior. Yes, the pressure loss was low, but the dust was easily clogged and the collection efficiency was inferior.
  • Comparative Example 5 the density of Example 3 was increased, and the basis weight CV value was superior, but the air volume was low, so that dust was easily clogged and the pressure loss was high, which was inferior.

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

Abstract

La présente invention concerne un nontissé filé-lié qui présente une excellente rigidité et une excellente uniformité de poids, tout en ayant une excellente performance de collecte de poussière et d'excellentes caractéristiques mécaniques. Selon la présente invention, un nontissé filé-lié est conçu à partir de filaments continus thermoplastiques, tout en ayant une partie fondue qui est partiellement fondue ; et ce nontissé filé-lié présente une valeur CV de poids inférieure ou égale à 6,0 %, une densité apparente de 0,20 g/cm3 à 0,30 g/cm3, une résistance à la flexion de 3 mN à 50 mN, et un poids de 90 g/m2 à 150 g/m2.
PCT/JP2020/048314 2019-12-23 2020-12-23 Nontissé filé-lié, milieu filtrant multicouche, milieu filtrant pour filtres plissés et filtre plissé WO2021132411A1 (fr)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6269874A (ja) * 1985-09-17 1987-03-31 旭化成株式会社 成型加工用不織シ−トとその製造方法
JPS6218661B2 (fr) * 1978-01-24 1987-04-23 Toyo Boseki
JP2006034216A (ja) * 2004-07-29 2006-02-09 Toray Ind Inc 柔軟性防草シート
JP2013154269A (ja) * 2012-01-27 2013-08-15 Toyobo Co Ltd フィルターろ材
WO2017038977A1 (fr) * 2015-09-03 2017-03-09 東レ株式会社 Procédé de fabrication et dispositif de fabrication de non-tissé filé-lié
WO2017110365A1 (fr) * 2015-12-22 2017-06-29 東レ株式会社 Non-tissé filé-lié pour filtre et procédé de fabrication dudit tissu
JP2018061924A (ja) * 2016-10-11 2018-04-19 倉敷繊維加工株式会社 エアフィルター用不織布濾材
WO2020004007A1 (fr) * 2018-06-25 2020-01-02 東レ株式会社 Tissu non-tissé filé-lié destiné à être utilisé dans des filtres, et son procédé de fabrication

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6218661B2 (fr) * 1978-01-24 1987-04-23 Toyo Boseki
JPS6269874A (ja) * 1985-09-17 1987-03-31 旭化成株式会社 成型加工用不織シ−トとその製造方法
JP2006034216A (ja) * 2004-07-29 2006-02-09 Toray Ind Inc 柔軟性防草シート
JP2013154269A (ja) * 2012-01-27 2013-08-15 Toyobo Co Ltd フィルターろ材
WO2017038977A1 (fr) * 2015-09-03 2017-03-09 東レ株式会社 Procédé de fabrication et dispositif de fabrication de non-tissé filé-lié
WO2017110365A1 (fr) * 2015-12-22 2017-06-29 東レ株式会社 Non-tissé filé-lié pour filtre et procédé de fabrication dudit tissu
JP2018061924A (ja) * 2016-10-11 2018-04-19 倉敷繊維加工株式会社 エアフィルター用不織布濾材
WO2020004007A1 (fr) * 2018-06-25 2020-01-02 東レ株式会社 Tissu non-tissé filé-lié destiné à être utilisé dans des filtres, et son procédé de fabrication

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