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WO2025074978A1 - Film pour papier isolant de moteur et son procédé de fabrication - Google Patents

Film pour papier isolant de moteur et son procédé de fabrication Download PDF

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Publication number
WO2025074978A1
WO2025074978A1 PCT/JP2024/035035 JP2024035035W WO2025074978A1 WO 2025074978 A1 WO2025074978 A1 WO 2025074978A1 JP 2024035035 W JP2024035035 W JP 2024035035W WO 2025074978 A1 WO2025074978 A1 WO 2025074978A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
elastomer
crystalline resin
insulating paper
less
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.)
Pending
Application number
PCT/JP2024/035035
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English (en)
Japanese (ja)
Inventor
聡史 竹中
徹 佐々木
正登志 阿部
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.)
AGC Inc
Original Assignee
Asahi Glass Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Publication of WO2025074978A1 publication Critical patent/WO2025074978A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
    • C08L71/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
    • C08L81/02—Polythioethers; Polythioether-ethers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/56—Insulating bodies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/30—Windings characterised by the insulating material

Definitions

  • the present invention relates to a film for motor insulating paper and a method for manufacturing the same.
  • Engineering plastics such as polyaryletherketone and polyarylene sulfide have excellent heat resistance and mechanical properties, and are widely used as molding materials in a variety of fields.
  • Patent Document 1 discloses a film containing an aromatic polyether ketone resin and a fluoropolymer, in which the fluoropolymer forms a dispersed phase and the aromatic polyether ketone resin has a crystallinity of less than 6%.
  • US Pat. No. 5,399,633 discloses a film containing polyaryletherketone and a fluoroelastomer, the fluoroelastomer forming a dispersed phase.
  • Patent Document 3 discloses a molded article made of a thermoplastic resin having a specific shear stress and a fluoroelastomer dispersed in the thermoplastic resin.
  • compositions of engineering plastics such as polyaryl ether ketone and elastomers disclosed in Patent Documents 1 to 3 are said to have improved flexibility, flex resistance, and low dielectric properties, and to have excellent impact resistance and moldability.
  • molded products such as films formed from these compositions, it is difficult to achieve a good balance between mechanical properties such as flex resistance and flexibility, heat resistance properties such as dimensional stability, and electrical properties such as electrical insulation.
  • electrical properties such as electrical insulation.
  • the inventors focused on the relationship between the crystallinity of a composition of an engineering plastic such as polyaryl ether ketone and an elastomer, and the crystallinity of the engineering plastic itself that constitutes the composition. As a result, they discovered that by controlling the crystallinity within a specified range, a film with excellent durability and a highly balanced set of mechanical properties, heat resistance, and electrical properties can be obtained, and that such a film is useful as an insulating sheet for motors, generators, etc.
  • an engineering plastic such as polyaryl ether ketone and an elastomer
  • [6] The film for motor insulating paper according to any one of [1] to [5], wherein the crystallinity of the film is 10% or more and 70% or less relative to the crystallinity of the crystalline resin.
  • [9] The film for motor insulating paper according to any one of [1] to [8], wherein the average dispersed particle size of the elastomer is less than 5.0 ⁇ m.
  • the present invention provides a film for motor insulating paper that has a good balance of mechanical properties such as bending resistance and flexibility, heat resistance such as dimensional stability, and electrical properties such as electrical insulation, as well as a method for producing the same, and motor insulating paper that includes the film for motor insulating paper.
  • the "volume" of a thermoplastic crystalline resin or elastomer is a value calculated by dividing the mass (g) of the crystalline resin or elastomer by its specific gravity (g/cm 3 ).
  • the "specific gravity” of a thermoplastic crystalline resin or elastomer is a value at 23°C measured by the water displacement (suspension) method.
  • the "Mooney viscosity (ML 1+10 , 121°C)" of an elastomer is a value measured at 121°C in accordance with JIS K6300-1:2000 (corresponding international standards ISO 289-1:2005, ISO 289-2:1994).
  • the crystallinity of the present film relative to the crystallinity of the crystalline resin is likely to be reduced to a predetermined range and converged. Therefore, it is presumed that the present film has a highly balanced electrical property such as electrical insulation while maintaining mechanical properties such as bending resistance and flexibility based on the crystalline resin, and heat resistance such as dimensional stability.
  • the crystallinity of the present film is preferably 10 to 70%, and more preferably 10 to 40%.
  • the crystallinity of the present film is preferably 10 to 70%, and more preferably 30 to 60%.
  • the tensile modulus of the present film is preferably 3600 MPa or less, and from the viewpoint of flexibility, is more preferably 3550 MPa or less, even more preferably 3500 MPa or less, and even more preferably 3000 MPa or less.
  • the lower limit of the tensile modulus of the present film is not particularly limited, but is preferably, for example, 1500 MPa or more, and more preferably 2000 MPa or more.
  • the tensile modulus of the present film after being left at 200° C. for 500 hours is preferably 1500 MPa or more, more preferably 2000 MPa or more, and even more preferably 2100 MPa or more.
  • the tensile modulus of the present film after being left at 200° C. for 500 hours is not particularly limited, but is preferably, for example, 4000 MPa or less.
  • the tensile modulus of the present film after being left at 200° C. for 500 hours is within the above range, it is likely to have sufficient heat resistance for practical use.
  • the dielectric constant of the present film is preferably less than 3.5, more preferably 2.5 or less, and is preferably 1 or more.
  • the film has excellent heat resistance and oil resistance, and is likely to maintain electrical properties such as electrical insulation over a long period of time.
  • the inception voltage of partial discharge is likely to be increased, and as a result, the occurrence of partial discharge is likely to be suppressed.
  • the elongation at break of the present film is preferably 10 to 250%, more preferably 40 to 250%, and even more preferably 50 to 250%.
  • the processability is likely to be improved.
  • the film has an elongation at break after being left at 200° C. for 500 hours of preferably 10 to 250%, more preferably 20 to 250%, and even more preferably 30 to 250%.
  • the PAS is preferably a polymer having 70 mol % or more of the following unit (a) based on all the constituent units. [-Ar-S-] ...(a)
  • Ar represents a divalent aromatic group having one or more benzene rings.
  • the divalent aromatic group may have a substituent such as an alkyl group having 1 to 10 carbon atoms, a nitro group, a phenyl group, an alkoxy group having 1 to 10 carbon atoms, a carboxy group, or a metal carboxylate base (sodium salt, lithium salt, etc.).
  • a substituent such as an alkyl group having 1 to 10 carbon atoms, a nitro group, a phenyl group, an alkoxy group having 1 to 10 carbon atoms, a carboxy group, or a metal carboxylate base (sodium salt, lithium salt, etc.).
  • the ratio of unit (a) to all constituent units is preferably 80 mol% or more from the viewpoint of toughness, more preferably 85 mol% or more, and may be 100 mol%.
  • the PAS may further have other units besides unit (a).
  • other units include polyfunctional units having three or more bonds, in which one or more -S- are further bonded to Ar in unit (a).
  • the PAS has a polyfunctional unit as another unit, the PAS has a branched structure or a crosslinked structure.
  • PAS either a linear type PAS, whose molecular structure does not have a branched or crosslinked structure, or a crosslinked type PAS, whose molecular structure has a branched or crosslinked structure, can be used. From the viewpoint of making it easier to improve the toughness of this film, a linear type PAS is preferred.
  • polyphenylene sulfide (PPS), in which Ar in unit (a) is a phenylene group, is more preferred from the standpoint of mechanical properties and heat resistance.
  • PAEK polyether ketone
  • PEEK polyether ether ketone
  • PEKK polyether ketone ketone
  • the PAEK may be used alone or in combination of two or more kinds.
  • the fluoroelastomer may be a fluoroelastomer consisting of only one or more units selected from the group consisting of TFE units, HFP units, VdF units, VF units, and CTFE units.
  • the fluoroelastomer may be a fluoroelastomer containing one or more units selected from the group consisting of TFE units, HFP units, VdF units, VF units, and CTFE units, and other monomer units other than TFE units, HFP units, VdF units, VF units, and CTFE units.
  • TFE/P-containing copolymer examples include TFE/P (meaning a copolymer composed of TFE units and P units; the same applies to others), TFE/P/VF, TFE/P/VdF, TFE/P/E, TFE/P/TFP, TFE/P/PAVE, TFE/P/1,3,3,3-tetrafluoropropylene, TFE/P/2,3,3,3-tetrafluoropropylene, TFE/P/TrFE, TFE/P/DiFE, TFE/P/VdF/TFP, and TFE/P/VdF/PAVE.
  • TFE/P meaning a copolymer composed of TFE units and P units; the same applies to others
  • TFE/P/VF meaning a copolymer composed of TFE units and P units; the same applies to others
  • TFE/P/VF meaning a copolymer composed of TFE units and P units; the same applies to others
  • HFP/VdF-containing copolymers examples include HFP/VdF, TFE/VdF/HFP, TFE/VdF/HFP/TFP, TFE/VdF/HFP/PAVE, VdF/HFP/TFP, and VdF/HFP/PAVE.
  • TFE/PAVE-containing copolymer examples include TFE/PAVE, TFE/PMVE, and TFE/PMVE/PPVE.
  • the fluoroelastomer may be a commercially available product, or may be synthesized by emulsion polymerization, solution polymerization, suspension polymerization, bulk polymerization, or the like.
  • the fluoroelastomer may have a functional group at the end.
  • the functional group is preferably at least one selected from the group consisting of an iodine atom, an epoxy group, and a carboxylic anhydride group, and more preferably an iodine atom.
  • the "average dispersed particle diameter" of the elastomer is determined by observing the cross section of the film with a scanning electron microscope (SEM) and calculating the arithmetic mean of the maximum diameters of 100 randomly selected domains (dispersed particles).
  • plasticizer examples include phthalates and adipates.
  • flame retardants include aluminum hydroxide, magnesium hydroxide, magnesium carbonate, antimony trioxide, sodium antimonate, antimony pentoxide, phosphazene compounds, phosphate esters (triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl phenyl phosphate, 2-ethylhexyl diphenyl phosphate, etc.), ammonium polyphosphate, melamine-melam-melem polyphosphate, red phosphorus, molybdenum compounds, boric acid compounds, and polytetrafluoroethylene.
  • the total amount of such components is preferably 0.1 to 50% by volume, more preferably 1 to 40% by volume, and even more preferably 3 to 30% by volume.
  • the composition constituting the film can be prepared, for example, by melt-kneading a crystalline resin and an elastomer, and, if necessary, other components.
  • the other components may be added when the crystalline resin and the elastomer are melt-kneaded, or may be added after the crystalline resin and the elastomer are melt-kneaded.
  • the elastomer before melt-kneading is preferably in a crumb-like form.
  • the number average particle size of the elastomer before melt-kneading is preferably 10 mm or less, more preferably 8 mm or less, and even more preferably 6 mm or less.
  • the conveyability by the screw during melt-kneading is likely to be stable.
  • volume ratio of the crystalline resin to the elastomer in the melt kneading are the same as those described above for the volume ratio of the crystalline resin to the elastomer in the present composition.
  • the volume ratio of the crystalline resin and the volume ratio of the elastomer are within the above-mentioned ranges, the appearance of the strand obtained during melt kneading is less rough.
  • the total volumetric percentage of the crystalline resin and the volumetric percentage of the elastomer is within the above-mentioned range, and the volumetric percentage of the crystalline resin is within the above-mentioned range, flexibility is easily exhibited.
  • melt kneading devices can be used.
  • a single screw extruder or twin screw extruder is preferred, a twin screw extruder is more preferred, and a twin screw extruder equipped with a screw with a high kneading effect is even more preferred.
  • a screw with a high kneading effect can be selected that has a sufficient kneading effect on the material to be melt kneaded and does not apply excessive shear force.
  • An example of a melt kneading device is the Labo Plastomill Kneader (manufactured by Toyo Seiki Seisakusho).
  • the crystalline resin and elastomer may be premixed and supplied to the melt kneading device, or the crystalline resin and elastomer may be supplied separately to the melt kneading device.
  • the other components may be premixed with either the crystalline resin or the elastomer and the other component and supplied to the melt kneading device, or the other components may be supplied to the melt kneading device separately from the crystalline resin and the elastomer.
  • the other components may also be added after the crystalline resin and the elastomer are melt kneaded.
  • the melt-kneading temperature is preferably set depending on the crystalline resin and elastomer, and is preferably 200 to 450°C, more preferably 240 to 400°C, further preferably 250 to 350°C, and particularly preferably 280 to 330°C.
  • the melt-kneading temperature is within the above range, the elastomer is easily dispersed in the crystalline resin, coarse particles of the elastomer are unlikely to remain, and the elastomer is unlikely to be thermally decomposed, and is likely to have excellent heat resistance.
  • the residence time of the material to be melt-kneaded in the melt-kneading device is preferably from 10 to 290 seconds, more preferably from 20 to 240 seconds, and even more preferably from 30 to 210 seconds.
  • the residence time of the material to be melt-kneaded in the melt-kneading device is within the above range, the elastomer is easily dispersed in the crystalline resin, coarse particles of the elastomer are unlikely to remain, and thermal decomposition of the elastomer is unlikely to be promoted.
  • Another embodiment of the present invention relates to a method for producing a film for motor insulating paper (hereinafter also referred to as "the present production method"), which comprises melt-molding a composition (the present composition) containing a thermoplastic crystalline resin and an elastomer, and then cooling at 180°C or higher, the film having a thickness of 50 to 1000 ⁇ m, a dimensional change rate calculated by the following formula (X) of less than 10%, the elastomer being dispersed in the crystalline resin, and a crystallinity of 95% or less relative to the crystallinity of the crystalline resin.
  • the present production method comprises melt-molding a composition (the present composition) containing a thermoplastic crystalline resin and an elastomer, and then cooling at 180°C or higher, the film having a thickness of 50 to 1000 ⁇ m, a dimensional change rate calculated by the following formula (X) of less than 10%, the elastomer being dispersed in the crystalline resin, and
  • the manufacturing method is characterized in that the composition is melt-molded into a film and then cooled to 180°C or higher.
  • the elastomer is more likely to function as a crystal nucleating agent, making it easier for the mechanism described above to manifest.
  • the properties based on the crystalline resin and elastomer are more fully exhibited, resulting in a film with excellent heat resistance, electrical insulation, and dimensional stability.
  • This film can be particularly well suited for use as a film for motor insulating paper that constitutes the insulating sheets of rotating electrical machines such as motors, generators, and inverters.
  • the present invention includes motor insulating paper that includes this film.
  • This film can also be used favorably in speaker diaphragms, trauma and fracture plates, insulating paper such as various electrical insulating adhesive tapes, sealing tape for oil and natural gas pipes, release film, film for covering electric wires, flexible printed circuit boards, rigid circuit boards, coverlay, housing for electronic devices, heat-resistant rolls for office equipment, films for impregnating other fiber composite films, insulating tape for film capacitors, and for fastening elements in electrolytic capacitors such as aluminum and tantalum.
  • insulating paper such as various electrical insulating adhesive tapes, sealing tape for oil and natural gas pipes, release film, film for covering electric wires, flexible printed circuit boards, rigid circuit boards, coverlay, housing for electronic devices, heat-resistant rolls for office equipment, films for impregnating other fiber composite films, insulating tape for film capacitors, and for fastening elements in electrolytic capacitors such as aluminum and tantalum.
  • the present film is not limited to the configurations of the above-mentioned embodiments.
  • the present film may have any other configuration in addition to the configurations of the above-mentioned embodiments, or may be replaced with any configuration that produces a similar effect.
  • the manner of use of the present film may have any other configuration in addition to the configurations of the above-mentioned embodiments, or may be replaced with any configuration that produces a similar effect.
  • Example 1 Crystalline resin A1 and elastomer B1 were mixed in the volume ratio shown in Table 1, and then the mixture was fed to the base end of the screw of a twin-screw extruder (Technovel Co., Ltd., KZW32TW-45MG-NH (-1500), screw diameter: 30 mm ⁇ , L/D: 24) using a feeder so that the flow rate was 15.0 kg/hour.
  • a twin-screw extruder Technovel Co., Ltd., KZW32TW-45MG-NH (-1500), screw diameter: 30 mm ⁇ , L/D: 24
  • compositions 2 to 6 Pellets of compositions 2 to 6 were obtained under the same conditions as in Example 1, except that the volume ratio of crystalline resin A1 and elastomer B1 was changed as shown in Table 1. When it was difficult to form strands, the composition was cooled with water instead of air, and cut with a pelletizer. Next, Compositions 2 to 6 were extruded into a film under the same conditions as in Example 1, and then cooled by passing one side of the film through a metal roll maintained at the temperature shown in Table 1 so as to come into contact with the film, thereby obtaining a film having a thickness of 150 ⁇ m.
  • Example 7 Crystalline resin A2 and elastomer B2 were mixed in the volume ratio shown in Table 2, and then the mixture was fed to the base end of the screw of a twin-screw extruder (Technovel Co., Ltd., KZW32TW-45MG-NH (-1500), screw diameter: 30 mm ⁇ , L/D: 24) using a feeder so that the flow rate was 15.0 kg/hour.
  • a twin-screw extruder Technovel Co., Ltd., KZW32TW-45MG-NH (-1500), screw diameter: 30 mm ⁇ , L/D: 24
  • compositions 8 to 12 Pellets of compositions 8 to 12 were obtained under the same conditions as in Example 1, except that the volume ratio of crystalline resin A2 and elastomer B2 was changed as shown in Table 1. When it was difficult to form strands, the composition was cooled with water instead of air, and cut with a pelletizer. Next, Compositions 8 to 12 were extruded into a film under the same conditions as in Example 7, except that the cylinder rotation speed of the single-screw extruder was changed to 27 rpm in Example 10, 20 rpm in Example 11, and 13.5 rpm in Example 12. The film was then cooled by passing it through a metal roll maintained at the temperature shown in Table 2 so that one side of the film was in contact with the metal roll, thereby obtaining a film having a thickness of 150 ⁇ m.
  • a dumbbell-shaped test piece as specified in ASTM D638 TYPEV was cut out, and the tensile modulus was measured using a TENSILON (manufactured by A&D Co., Ltd., model: RTF-1350) in accordance with JIS K7161 (corresponding international standard ISO 527-1:2012) with a load cell rating of 10 kN, a chuck distance of 115 mm, and a speed of 50 mm/min.
  • TENSILON manufactured by A&D Co., Ltd., model: RTF-1350
  • Breakdown voltage An impulse partial discharge tester (DWX-05PD, manufactured by Electronic Control International Co., Ltd.) was used for the measurements.
  • the film obtained in each example was placed on a PD sensor distance of 10 cm and a test electrode ⁇ 25 flat electrode.
  • the device was then set to 1.5 kV at the start of the test, 3.7 kV at the end of the test, and a step of 2%, and measurements were taken at three different locations per sheet, seven times per test.
  • the breakdown voltage was obtained as the average value of the last five measured values. The measurements were performed at 23°C.
  • the films of Examples 1 and 7 are excellent in terms of mechanical properties, heat resistance (rate of dimensional change) and electrical insulation properties in a well-balanced manner. From Examples 2, 4, and 5, it can be seen that as the elastomer content in the composition constituting the film increases, the ratio of the crystallinity of the film to the crystallinity of the crystalline resin A1 constituting the composition decreases, and the electrical insulation properties improve. From Examples 8, 10, and 11, it can be seen that as the elastomer content in the composition constituting the film increases, the ratio of the crystallinity of the film to the crystallinity of the crystalline resin A2 constituting the composition decreases, and the dimensional change rate decreases.
  • the cooling temperature after melt molding of the composition is different between the film of Example 2 and the film of Example 3, and even though the ratio of the crystallinity of the film to the crystallinity of the crystalline resin A1 constituting the composition is approximately the same, the dimensional change rate is large for the film of Example 3. A similar tendency is observed for the films of Examples 8 and 9, and the film of Example 9 has a large dimensional change rate.
  • Partial Discharge Inception Voltage Square test pieces with sides of 50 mm were cut out from each of the films obtained in Examples 1, 6, 7, and 12, and the partial discharge inception voltages (PDIV) of the test pieces were measured using a partial discharge meter (model number "QM-50") manufactured by Mitsubishi Electric Wire Industries, Ltd. In the measurement, the test pieces were sandwiched between a stainless steel plate and a brass electrode, and an AC voltage was applied between the stainless steel plate and the brass electrode at a voltage rise rate of 200 Vrms/sec, and the voltage value was determined when the discharge charge amount measured by the partial discharge meter reached 100 pC.
  • PDIV was measured at 25°C and 150°C, and the PDIV measured value at 150°C (relative value) relative to the PDIV measured value at 25°C was calculated.
  • the test piece was immersed in oil for a long period of time, the oil was wiped off, and then the PDIV was measured at 25°C.
  • the measured value after immersion in oil (relative value) to the measured value before immersion in oil was calculated and used as an index of oil resistance. The above results are shown in Table 3.
  • the film of the present invention has a good balance of mechanical properties such as bending resistance and flexibility, heat resistance such as dimensional stability, and electrical properties such as electrical insulation. Therefore, it can be suitably used as a film for motor insulating paper that constitutes the insulating sheets of rotating electrical machines such as motors, generators, and inverters.

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
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  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention propose : un film pour papier d'isolation de moteur, qui est excellent en termes de propriétés mécaniques telles que la résistance à la flexion et la flexibilité, la résistance à la chaleur telle qu'une stabilité dimensionnelle, et des caractéristiques électriques telles que l'isolation électrique d'une manière bien équilibrée ; et son procédé de fabrication.　Ce film pour papier d'isolation de moteur est moulé à l'état fondu à partir d'une composition qui contient une résine cristalline thermoplastique et un élastomère, présente une épaisseur comprise entre 50 µm et 1 000 µm, présente un taux de changement dimensionnel inférieur à 10 %, comprend l'élastomère dispersé dans la résine cristalline, et présente une cristallinité de 95 % ou moins par rapport à la cristallinité de la résine cristalline.　(X) : Le taux de variation dimensionnelle (%) = (1 - (L1/L0)) × 100 dans la formule, L0 représente la longueur du film dans la direction MD, et L1 représente la longueur du film dans la direction MD après avoir été laissé à une température de 200 °C pendant une heure.
PCT/JP2024/035035 2023-10-06 2024-10-01 Film pour papier isolant de moteur et son procédé de fabrication Pending WO2025074978A1 (fr)

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JP2023-174235 2023-10-06
JP2023174235 2023-10-06

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017169394A (ja) * 2016-03-17 2017-09-21 日東シンコー株式会社 回転電機用絶縁紙
WO2017188280A1 (fr) * 2016-04-28 2017-11-02 旭硝子株式会社 Composition de copolymère comprenant du fluor, procédé de préparation de la composition de copolymère comprenant du fluor, et article moulé
WO2019198771A1 (fr) * 2018-04-13 2019-10-17 Ａｇｃ株式会社 Composition de résine, moulage et application associée
JP2020089995A (ja) * 2018-12-04 2020-06-11 三菱ケミカル株式会社 積層フィルム
WO2023136248A1 (fr) * 2022-01-12 2023-07-20 Ａｇｃ株式会社 Composition de résine, corps moulé, et utilisation associée

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JP2017169394A (ja) * 2016-03-17 2017-09-21 日東シンコー株式会社 回転電機用絶縁紙
WO2017188280A1 (fr) * 2016-04-28 2017-11-02 旭硝子株式会社 Composition de copolymère comprenant du fluor, procédé de préparation de la composition de copolymère comprenant du fluor, et article moulé
WO2019198771A1 (fr) * 2018-04-13 2019-10-17 Ａｇｃ株式会社 Composition de résine, moulage et application associée
JP2020089995A (ja) * 2018-12-04 2020-06-11 三菱ケミカル株式会社 積層フィルム
WO2023136248A1 (fr) * 2022-01-12 2023-07-20 Ａｇｃ株式会社 Composition de résine, corps moulé, et utilisation associée

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