US20020132546A1 - Melt-blown, non-woven fabric of polyarylene sulfide and method for producing same - Google Patents

Melt-blown, non-woven fabric of polyarylene sulfide and method for producing same Download PDF

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US20020132546A1
US20020132546A1 US09/317,986 US31798699A US2002132546A1 US 20020132546 A1 US20020132546 A1 US 20020132546A1 US 31798699 A US31798699 A US 31798699A US 2002132546 A1 US2002132546 A1 US 2002132546A1
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melt
blown
woven fabric
polyarylene sulfide
pas
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Hidenori Yamanaka
Osamu Komiyama
Shigeo Fuji
Mitsuru Kawazoe
Takashi Mikami
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DIC Corp
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Publication of US20020132546A1 publication Critical patent/US20020132546A1/en
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    • 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
    • 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
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • 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
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/76—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from other polycondensation products
    • D01F6/765—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from other polycondensation products from polyarylene sulfides
    • 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
    • D04H3/016—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the fineness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/68—Melt-blown nonwoven fabric

Definitions

  • the non-woven fabrics are produced by various methods such as a dry method, a wet method, a spun-bounding method and a melt-blowing method.
  • the melt-blowing method has been often used to produce the non-woven fabrics for battery separators, since the melt-blown, non-woven fabrics are constituted by extremely fine fibers.
  • the non-woven polypropylene fabrics are disadvantageous in that they are insufficient in heat resistance, chemical resistance, flame retardance, etc. depending on their applications.
  • the non-woven polypropylene fabrics are likely to be insufficient in holding an electrolyte solution, because the battery separators have recently been made thin as the capacity of the batteries increases.
  • Japanese Patent Laid-Open No. 63-315655 discloses a melt-blown, non-woven fabric of polyphenylene sulfide having a basis weight variable within 7% and constituted by polyphenylene sulfide fibers having an average diameter of 0.5 denier or less and at least partially fused or entangled to each other, which is produced from polyphenylene sulfide having a weight average molecular weight of 20,000-70,000.
  • this non-woven fabric is disadvantageous in having a larger average fiber diameter, because the polyarylene sulfide having a weight average molecular weight of 20,000 or more is used to provide the non-woven fabric with sufficient strength.
  • an object of the present invention is to provide a melt-blown, non-woven fabric constituted by extremely fine polyarylene sulfide fibers and a method for producing it stably.
  • melt-blown, non-woven fabric of the present invention is produced from polyarylene sulfide having a non-Newtonian coefficient of 1.05-1.20.
  • the method for producing a melt-blown, non-woven fabric according to the present invention comprises the steps of:
  • FIG. 1 is a schematic view showing a screw kneading-type heating apparatus for producing branched polyarylene sulfide by a thermal oxidation cross-linking treatment
  • FIG. 2 is a schematic view showing an example of apparatus for producing the melt-blown, non-woven fabric of the present invention from polyarylene sulfide;
  • PAS used in the present invention may be a homopolymer or a copolymer mainly composed of an arylene sulfide repeating unit represented by the following general formula:
  • the above arylene sulfide repeating unit may be substituted in a range within 30 mol % by at least one repeating unit selected from the group consisting of those represented by the following formulae (i)-(v):
  • R 1 represents an alkyl group, a nitro group, a phenyl group or an alkoxyl group.
  • the PAS used in the present invention is substantially non-linear (branched) polymer.
  • the non-linearity (degree of branching) of PAS may be represented by a non-Newtonian coefficient (N).
  • the PAS used in the present invention should have a non-Newtonian coefficient of 1.05-1.20.
  • the non-Newtonian coefficient (N) is an exponent term in the following equation (1):
  • SR represents a shear rate [1s]
  • SS represents a shear stress [dyn/cm 2 ]
  • K is a constant.
  • the PAS nears a linear polymer as the non-Newtonian coefficient (N) nears 1, and the larger the non-Newtonian coefficient (N), the higher the percentage of branched or cross-linked structure in the PAS.
  • the substantially non-linear PAS can be produced by a method for introducing the branched structure or a cross-linking method.
  • a mixture of an alkaline metal sulfide and a dihaloaromatic compound can be subjected to a polymerization reaction together with a polyhaloaromatic compound having three or more halogen substituents to introduce the branched structure to PAS.
  • Alkaline metal sulfides may be lithium sulfide, sodium sulfide, potassium sulfide, rubidium sulfide, cesium sulfide, etc. Also usable as the alkaline metal sulfides are alkaline metal hydrosulfides corresponding to the alkaline metal sulfides and alkaline metal hydrates neutralized by alkaline metal hydroxides. Among them, sodium sulfide is preferable because of inexpensiveness.
  • dihaloaromatic compounds may be represented by the following general formula:
  • X represents a halogen atom
  • R represents an alkyl or alkoxyl group having 1-3 carbon atoms
  • n represents an integer of 0-3.
  • Preferred dihaloaromatic compounds may be, for example, dihalobenzenes represented by following formulae (vi) and (vii):
  • X 1 represents a halogen atom, or mixtures thereof.
  • p-dichlorobenzene (vi) is particularly preferable.
  • the p-isomer is preferably 85 mol % or more.
  • the polyhaloaromatic compounds having 3 or more halogen substituents may be 1,2,3-trichlorobenzene, 1,2,4-trichlorobenzene, 1,3,5-trichlorobenzene, 1,3-dichloro-5-bromobenzene, 2,4,6-trichlorobenzene, 1,2,3,5 -tetrabromobenzene, hex achlorob enzene, 1,3,5 -trichloro-2,4,6-trimethylbenzene, 2,2′,4,4′-tetrachlorobiphenyl, 2,2′,6,6′-tetrabromo-3,3′,5,5′-tetramethylbiphenyl, 1,2,3,4-tetrachloronaphthalene, 1,2,4-tribromo-6-methylnaphthalene, etc. and mixtures thereof.
  • the degree of branching of PAS may be controlled by adjusting the amount of the polyhaloaromatic compound added.
  • the amount of the polyhaloaromatic compound is preferably 0.001-0.6 mol %, more preferably 0.01-0.3 mol %, based on 100 mol % of the alkaline metal sulfide (sulfur atom).
  • the PAS prepared with 0.001-0.6 mol % of the polyhaloaromatic compound has a non-Newtonian coefficient of 1.05-1.20.
  • the polymerization reaction is carried out in a polar solvent.
  • the preferred polar solvent is an amide solvent such as N-methyl-2-pyrroridone (NMP), dimethylacetamide, etc. or a sulfone solvent such as sulforane, etc.
  • NMP N-methyl-2-pyrroridone
  • An alkaline metal salt of carboxylic acid, sulfonic acid, etc., alkaline hydroxide, etc. may preferably be added to control the degree of polymerization of PAS.
  • the polymerization reaction is preferably carried out at 180-300° C. for 2-10 hours in an inert gas atmosphere. After the polymerization reaction, the reaction mixture is filtered, and the resultant polymer is sufficiently washed with de-ionized warm water and dried to provide a branched PAS.
  • Methods of adding the polyhaloaromatic compound to the reaction mixture are not restrictive.
  • the polyhaloaromatic compound may be added simultaneously with the alkaline metal sulfide and the dihaloaromatic compound.
  • the polyhaloaromatic compound may also be introduced in the form of a solution in an organic solvent such as NMP into the reactor under pressure with a high-pressure pump at an optional stage.
  • the PAS obtained by adding the polyhaloaromatic compound is a substantially non-linear polymer, because it comprises 0.001-0.6 mol %, based on 100 mol % of repeating units each containing one sulfur atom, of branched repeating units containing two or more sulfur atoms.
  • the branched repeating unit is exemplified by the following formulae (viii) and (ix):
  • the alkaline metal sulfide, the dihaloaromatic compound and their polymerization method may be the same as those explained in the previous column entitled “(1) Method for introducing branched structure.”
  • the thermal oxidation cross-linking treatment may be conducted after the polyhaloaromatic compound is added.
  • the thermal oxidation cross-linking treatment is carried out in an oxygen-containing atmosphere such as the air, a mixed gas of oxygen and an inert gas (argon, carbon dioxide, etc.), etc.
  • an oxygen-containing atmosphere such as the air, a mixed gas of oxygen and an inert gas (argon, carbon dioxide, etc.), etc.
  • the oxygen content is preferably 0.5-50 volume %, more preferably 10-25 volume %.
  • the oxygen content exceeds 50 volume %, too much radical is formed, making the polymer have extremely high melt viscosity and darker color.
  • the oxygen content is less than 0.5 volume %, the thermal oxidation cross-linking takes place very slowly.
  • the thermal oxidation cross-linking temperature is preferably 160-260° C., more preferably 180-230° C. When it is lower than 160° C., the thermal oxidation cross-linking takes too long period of time, making the entire process economically disadvantageous. On the other hand, when it exceeds 260° C., the PAS is likely to decompose.
  • the thermal oxidation cross-linking time is preferably 1-120 hours, more preferably 3-100 hours. The degree of cross-linking can preferably be controlled by adjusting the thermal oxidation cross-linking time.
  • the screw kneading-type heating apparatus 1 has an inverted cone-shaped bath 10 enclosed by a heating jacket 11 and containing a screw 12 .
  • the heating jacket 11 is connected to a heating medium-circulating system 11 a.
  • the inverted cone-shaped bath 10 has an upper cover 10 a provided with an inlet 13 for PAS and a driving motor 14 .
  • a link 15 fixed to a shaft 14 a of the driving motor 14 has a tip end rotatably connected to an upper end of the screw 12 .
  • a lower end of the screw 12 is rotatably connected via a universal joint to a shaft 10 b fixed to a bottom of the inverted cone-shaped bath 10 .
  • the screw 12 is rotated by the driving motor 14 along a conical orbit as shown by the arrow in FIG. 1 on an inner wall of the inverted cone-shaped bath 10 .
  • the PAS thus obtained has a non-Newtonian coefficient of 1.05-1.20 as described above.
  • Additives such as a heat stabilizer, a light stabilizer, a flame retardant, a plasticizer, an antistatic agent, a foaming agent, a nucleating agent, etc. and/or thermoplastic resins such as polyethylene terephthalate, polypropylene, polyethylene, etc. may be added in suitable amounts to the PAS, if necessary.
  • These additives are preferably melt-blended with PAS at 280-340° C., preferably 280-320° C. using a blending machine such as a single-screw extruder, a double-screw extruder, a Banbury mixer, a kneading roll, a Brabender mixer, a plastgraph, etc. to achieve good dispersion.
  • FIG. 3 shows a cross-section of the die 22 .
  • the die 22 is constituted by an upper die plate 41 , a lower die plate 42 , an upper gas plate 43 and a lower gas plate 44 . These parts are assembled to form nozzles 30 , gas-blowing slits 31 , 32 , and upper and lower gas chambers 45 , 46 communicating with the slits 31 , 32 .
  • Each nozzle 30 is constituted by an upstream portion connected to an opening 47 for introducing PAS, a middle portion for forming a resin chamber 48 , and a downstream portion having an orifice through which the PAS is extruded.
  • the hot gas-conveying pipes 24 , 24 are connected to the upper gas chamber 45 and the lower gas chamber 46 , respectively.
  • Heaters 33 , 34 for maintaining the nozzles 30 at a predetermined temperature are embedded in the upper die plate 41 and the lower die plate 42 , respectively.
  • the PAS is supplied to the extruder 21 through the hopper 23 , melt-kneaded, charged into the resin chamber 48 of the die 22 through the opening 47 under pressure, and extruded through the nozzles 30 .
  • the molten PAS extruded through the nozzles 30 is drawn by a hot gas blown at a high velocity through the slits 31 , 32 to form extremely fine fibers 28 , which are then deposited to a predetermined thickness on a collecting surface such as a rotating collector roll 27 , thereby forming a non-woven fabric 29 .
  • the PAS is preferably melt-blown at a temperature about 15-75° C. higher than the melting point of the PAS.
  • the melt-blowing temperature is preferably 300-360° C.
  • the PAS may remain partially not molten.
  • the PAS is provided with a non-uniform melt viscosity that is often too high to form the extremely fine fibers, thereby forming thick and/or non-uniform fibers.
  • melt-blowing temperature exceeds 360° C.
  • the viscosity of the molten PAS is rather increased by excess oxidative degradation or cross-linking in the die 22 , particularly in the residence region of the die 22 .
  • the melt-blowing cannot be carried out stably, failing to produce uniform PAS fibers having an average fiber diameter of 10 ⁇ m or less.
  • an inner diameter of each nozzle 30 is preferably 0.1-1.0 mm, particularly 0.2-0.8 mm.
  • the nozzles 30 are maintained preferably at a temperature of 300-360° C.
  • the temperature of the nozzles is lower than 300° C.
  • the PAS is rapidly solidified immediately after extrusion through the nozzles 30 , whereby the PAS is too insufficiently drawn (crystallized) to provide the resultant non-woven fabric with a high heat resistance (heat shrinkability).
  • the temperature of the nozzles exceeds 360° C., the monofilaments of PAS are too much fused together to provide fibers with uniform diameters.
  • the extrusion speed of the PAS through the nozzles 30 is preferably 0.1-1.5 g/minute, particularly 0.2-1.0 g/minute.
  • the temperature of the hot gas blown through the slits 31 , 32 is preferably 300-360° C.
  • the temperature of the hot gas is lower than 300° C.
  • the PAS is rapidly solidified immediately after extrusion through the nozzles 30 , whereby the PAS is too insufficiently drawn (crystallized) to provide the resultant non-woven fabric with a high heat resistance (heat shrinkability).
  • the temperature of the hot gas exceeds 360° C., the monofilaments of PAS are too much fused together to provide fibers with uniform diameters.
  • the blowing rate of the hot gas stream through the slits 31 , 32 for drawing 1 kg/hr of PAS is preferably 30-100 Nm 3 /hr, particularly 40-70 Nm 3 /hr. A lower blowing rate of the hot gas would not enable the resultant fibers to have high tensile strength.
  • the preferred blowing pressure of the hot gas is 0.2-1.0 kgf/cm 2 G.
  • an inert gas such as a nitrogen gas, etc. is preferably introduced into the hopper 23 to prevent oxygen from entering, thereby preventing the PAS from suffering increase in melt viscosity due to excessive oxidative cross-linking in the melt extrusion process.
  • the extremely fine PAS fibers thus formed are continuously collected on the collector roll 27 while entangling with each other.
  • the distance between the die 22 and the collector roll 27 is preferably 5-100 cm, particularly 20-50 cm. When the distance exceeds 100 cm, the fiber flow is disturbed and the fibers are completely solidified before deposition, failing to obtain non-woven fabrics in which the fibers are sufficiently fused and entangled with each other. On the other hand, when the distance is less than 5 cm, the fibers are excessively fused with each other.
  • melt-blown, non-woven fabrics thus formed may further be subjected to such treatments as heat setting with a heating roll, calendering, annealing, infrared irradiation, induction heating, etc.
  • melt-blown, non-woven PAS fabric of the present invention has
  • [0063] (2) a basis weight of 5-500 g/m 2 , preferably 10-300 g/m 2 , particularly 20-100 g/m 2 .
  • the average fiber diameter is less than 0.1 ⁇ m, the fibers are less likely to be deposited orderly on the collector in the melt-blowing step, whereby the melt-blown fibers are cut to short length and scattered as flies, failing to form non-woven fabrics having uniform structures.
  • PAS-2 branched polyarylene sulfide
  • PAS-3 linear polyarylene sulfide
  • Comparative Synthesis Example 1 was charged into an oven with internal air circulation and subjected to a thermal oxidation cross-linking treatment at 230° C. for 4 hours, to obtain a polyarylene sulfide (PAS-5).
  • PAS-5 polyarylene sulfide
  • the polyarylene sulfide (PAS-1) obtained in SYNTHESIS EXAMPLE 1 was charged into a double-screw extruder of an apparatus for forming a melt-blown, non-woven fabric shown in FIG. 1, melt-kneaded and conveyed to a die having 300 nozzles each having an inner diameter of 0.4 mm linearly arranged at an interval of 0.8 mm and heated at 330° C.
  • a collector roll placed 50 cm away from the die was rotated at such a velocity as to provide a non-woven fabric having a basis weight of 50 g/m 2 .
  • the resultant extremely fine fibers were continuously collected and formed into a melt-blown, non-woven fabric.
  • melt-blown, non-woven fabric thus obtained was measured with respect to an average fiber diameter by the following method and evaluated with respect to melt-blowing stability by the following criteria. The results are shown in Table 1.
  • SR represents a shear rate [1/s]
  • SS represents a shear stress [dyn/cm 2 ]
  • K is a constant.
  • EXAMPLE 1 was repeated except for using the PAS-3, 4 and 7 obtained in COMPARATIVE SYNTHESIS EXAMPLES 1-3, respectively, instead of the PAS-1 to produce melt-blown, non-woven fabrics. An average diameter of the PAS fibers in the resultant non-woven fabrics was measured, and the melt-blowing stability was evaluated. The results are shown in Table 1. TABLE 1 Average Melt- Melt Vis- Non- Fiber Blow- cosity V 6 Newtonian Diameter ing No. Resin (poise) Coefficient N ( ⁇ m) Stability Example 1 PAS-1 300 1.13 7.5 Good Example 2 PAS-2 295 1.09 8.1 Good Example 3 PAS-5 400 1.19 9.5 Good Example 4 PAS-6 320 1.06 5.7 Good Comp. Ex. 1 PAS-3 310 1.02 15.0 Poor Comp. Ex. 2 PAS-4 80 1.00 13.1 Poor Comp. Ex. 3 PAS-7 450 1.22 17.3 Poor
  • melt-blown, non-woven fabrics of EXAMPLES 1-4 made of branched or cross-linked polyarylene sulfide are constituted by extremely fine fibers produced with good melt-blowing stability.
  • melt-blown, non-woven fabrics of Comparative Examples 1 and 2 made of the linear polyarylene sulfides are constituted by relatively thick fibers produced with poor melt-blowing stability.
  • melt-blown, non-woven fabric of COMPARATIVE EXAMPLE 3 made of the excessively cross-linked polyarylene sulfide are constituted by relatively thick fibers produced with poor melt-blowing stability.
  • melt-blown, non-woven fabrics of the present invention are produced from branched and/or cross-linked polyarylene sulfides having a non-Newtonian coefficient of 1.05-1.20, they are constituted by extremely fine fibers and can be produced with remarkable stability.
  • Such melt-blown, non-woven fabrics are useful for battery separators, liquid filters, gas filters, etc.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Filaments (AREA)
  • Nonwoven Fabrics (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
US09/317,986 1998-05-27 1999-05-25 Melt-blown, non-woven fabric of polyarylene sulfide and method for producing same Abandoned US20020132546A1 (en)

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JP14592198A JP3951078B2 (ja) 1998-05-27 1998-05-27 ポリアリーレンスルフィド製メルトブロー不織布及びその製造方法
JP10-145921 1998-05-27

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US20090162276A1 (en) * 2007-12-19 2009-06-25 Tepha, Inc. Medical devices containing melt-blown non-wovens of poly-4-hydroxybutyrate and copolymers thereof
US20110114274A1 (en) * 2008-07-18 2011-05-19 Toray Industries, Inc. Polyphenylene sulfide fiber, method for producing the same, wet-laid nonwoven fabric, and method for producing wet-laid nonwoven fabric
US20120276360A1 (en) * 2010-03-15 2012-11-01 Kolon Glotech, Inc. Conjugated fiber having excellent flame retardancy and color fastness and interior fabric using the same
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CN112281308A (zh) * 2020-09-08 2021-01-29 陈晶华 一种非纺织布生产用熔喷设备
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US20210095405A1 (en) * 2017-12-28 2021-04-01 3M Innovative Properties Company Ceramic-coated fibers including a flame-retarding polymer, and methods of making nonwoven structures
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JPH11335959A (ja) 1999-12-07
DE69910490T2 (de) 2004-06-24
EP0960967A1 (de) 1999-12-01
DE69910490D1 (de) 2003-09-25
EP0960967B1 (de) 2003-08-20
JP3951078B2 (ja) 2007-08-01

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