Classifications

• • 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
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/02—Elements
  • C08K3/04—Carbon
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/34—Heterocyclic compounds having nitrogen in the ring
  • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
  • C08K5/3477—Six-membered rings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/34—Heterocyclic compounds having nitrogen in the ring
  • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
  • C08K5/3477—Six-membered rings
  • C08K5/3492—Triazines
  • C08K5/34924—Triazines containing cyanurate groups; Tautomers thereof
• • 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
• • 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
  • C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K2201/00—Specific properties of additives
  • C08K2201/002—Physical properties
  • C08K2201/005—Additives being defined by their particle size in general

Definitions

• the present invention relates to flame-retardant insulating sheets and electric/electronic devices. This application claims priority based on Japanese Patent Application No. 2021-204328 filed in Japan on December 16, 2021, the content of which is incorporated herein.
• thermoplastic resins Conventionally, flame retardants have been added to thermoplastic resins to impart flame retardancy to resin moldings.
• a method of blending a large amount of an oligomer or polymer of a carbonate derivative of brominated bisphenol A has been used.
• thermoplastic resin composition containing a cyclic phosphorus compound and a cellulose-based resin and a film-like molded product obtained by molding the composition have been disclosed as solutions to these problems.
• the cyclic phosphorus compound is said to not only act as a flame retardant, but also contribute to improving the moldability, heat resistance, bending strength, etc. of the film-like molded product (see Patent Document 1).
• flame-retardant insulating sheets There are various uses for flame-retardant insulating sheets. For example, in electrical/electronic equipment, flame-retardant insulating sheets are sandwiched between circuit boards to prevent short circuits between the circuit boards. When such a flame-retardant insulating sheet is long, it is wound into a roll before use, and when it is not long, it is laminated in its thickness direction before use. are often stored In the case of resin sheets, when they are stacked and stored in this way, there is a problem that sticking tends to occur and the handleability is deteriorated, but the flame-retardant insulating sheet also has the same problem. do. In contrast, conventional flame-retardant insulating sheets, including the film-like molded article disclosed in Patent Document 1, are not intended to solve such problems.
• An object of the present invention is to provide a flame-retardant insulating sheet that can suppress sticking when stored in layers, and an electric/electronic device using the flame-retardant insulating sheet.
• a flame-retardant insulating sheet wherein the flame-retardant insulating sheet contains a polycarbonate resin and a flame retardant, the flame retardant comprises a nitrogen-containing compound
• a flame-retardant insulating sheet wherein the flame-retardant insulating sheet contains a polycarbonate resin and a flame retardant, the flame retardant comprises a nitrogen-containing compound, and the ridges on at least one surface of the flame-retardant insulating sheet
• a flame-retardant insulating sheet capable of suppressing sticking when stored in a piled state, and electrical/electronic equipment using the flame-retardant insulating sheet are provided.
• a flame-retardant insulating sheet contains a polycarbonate resin and a flame retardant, the flame retardant is a nitrogen-containing compound, and the peak points of at least one surface of the flame-retardant insulating sheet Arithmetic mean curvature (Spc) is 200 (1/mm) or more (in this specification, this flame-retardant insulating sheet may be referred to as "flame-retardant insulating sheet (1)").
• “Arithmetic mean curvature of peak points (Spc)” means the average of the principal curvatures of the peak points of the surface.
• the flame-retardant insulating sheet (1) has flame-retardant and insulating properties, it is suitable as a flame-retardant insulating sheet provided between circuit boards in electric/electronic devices. is.
• the flame-retardant insulating sheet (1) has an Spc of at least one surface of 200 (1/mm) or more, so that the point of contact with other objects is sharp, so it is stored in a pile.
• a long flame-retardant insulating sheet (1) is rolled and stored, and a non-long flame-retardant insulating sheet (1) is stacked in its thickness direction and stored. In both case and case, sticking of the flame-retardant insulating sheet (1) is suppressed.
• the flame-retardant insulating sheet (1) uses a flame-retardant resin composition containing the polycarbonate resin and a flame retardant (herein sometimes referred to as "flame-retardant resin composition (1)"). can be manufactured by
• the flame-retardant insulating sheet (1) contains the polycarbonate resin, it has excellent bending workability, punching workability, heat resistance and insulating properties.
• the polycarbonate resin contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) is produced, for example, by a phosgene method in which a dihydroxydiaryl compound and phosgene are reacted, or a dihydroxydiaryl compound and diphenyl carbonate, etc. is obtained by a transesterification method of reacting with a carbonate ester of
• examples of the dihydroxydiaryl compound include bisphenol A, bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxy phenyl)ethane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)octane, bis(4-hydroxyphenyl)phenylmethane, 2,2-bis(4-hydroxyphenyl) -3-methylphenyl)propane, bis(hydroxyaryl)alkanes such as 1,1-bis(4-hydroxy-3-tert-butylphenyl)propane; 1,1-bis(4-hydroxyphenyl)cyclopentane, Bis(hydroxyaryl)cycloalkanes such as 1,1-bis(4-hydroxyphenyl)cyclohexane; Dihydroxydiaryl ethers such as 4,4'-dihydroxydiphenyl ether and 4,4
• the dihydroxydiaryl compounds may be used singly or in combination of two or more. When using together, the combination and ratio thereof can be arbitrarily selected.
• the weight average molecular weight (Mw) of the polycarbonate resin is not particularly limited.
• the weight average molecular weight is, for example, preferably 15,000 to 35,000, more preferably 20,000 to 35,000, even more preferably 20,000 to 30,000.
• the weight-average molecular weight is within such a range, variations in the thickness of the flame-retardant insulating sheet (1) become smaller.
• the "weight average molecular weight” is a polystyrene equivalent value measured by a gel permeation chromatography (GPC) method.
• a molecular weight modifier, a catalyst, etc. may be used during the production of the polycarbonate resin in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1).
• the flame retardant contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) consists of a nitrogen-containing compound.
• the flame-retardant insulating sheet (1) contains a flame retardant made of a nitrogen-containing compound, so that it has sufficient flame retardancy.
• a nitrogen-containing compound means a compound having a nitrogen atom as a constituent atom.
• the flame retardant (nitrogen-containing compound) is preferably a compound having a triazine skeleton in that the flame retardancy of the flame-retardant insulating sheet (1) is further enhanced.
• the compound having a triazine skeleton (flame retardant) contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) includes, for example, melamine; butylmelamine, trimethylolmelamine, hexamethylolmelamine, hexamethoxy Melamine derivatives such as methyl melamine and melamine phosphate; cyanuric acid; cyanuric acid derivatives such as methyl cyanurate, diethyl cyanurate, trimethyl cyanurate and triethyl cyanurate; isocyanuric acid; , trismethyl isocyanurate, trisethyl isocyanurate, bis(2-carboxyethyl) isocyanurate, 1,3,5-tris(2-carboxyethyl) isocyanurate, tris(2,3-epoxypropyl) isocyanurate, etc.
• group includes not only an atomic group having a structure in which multiple atoms are bonded, but also a single atom, unless otherwise specified.
• the flame retardant (nitrogen-containing compound) contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) may be of only one type, or may be of two or more types. When there are more than one species, their combination and ratio can be arbitrarily selected.
• the flame retardant (nitrogen-containing compound) contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) is melamine, It is more preferably one or more selected from the group consisting of melamine derivatives, melamine cyanurate, melamine cyanurate derivatives, melamine isocyanurate and melamine isocyanurate derivatives, more preferably melamine cyanurate.
• the average particle size of the flame retardant (nitrogen-containing compound) contained in the flame-retardant insulating sheet (1) and flame-retardant resin composition (1) is preferably 0.3 to 32 ⁇ m, more preferably 0.7 to 30 ⁇ m. more preferably 1 to 30 ⁇ m, for example, 0.7 to 7 ⁇ m, 1 to 10 ⁇ m, or 10 to 30 ⁇ m.
• the flame-retardant insulating sheet (1) has higher flame retardancy.
• the flame retardant is better dispersed in the resin or resin composition (e.g., flame-retardant resin composition (1)), for example, by the laser diffraction / scattering particle size distribution measurement method described below, the The average particle size of the flame retardant can be measured more easily. However, these are examples of the average particle size.
• average particle size means the particle size of 50% accumulated particles measured by laser diffraction/scattering particle size distribution measurement, Sometimes referred to as "D50".
• the content ratio of the flame retardant (nitrogen-containing compound) to the content of the polycarbonate resin is 2 to 10% by mass.
• it may be either 2 to 8% by mass and 2 to 6% by mass, or may be either 6 to 10% by mass and 8 to 10% by mass, It may be 4 to 8% by mass.
• the ratio is equal to or higher than the lower limit, the flame retardancy of the flame-retardant insulating sheet (1) is further enhanced. Excess use of a flame retardant is suppressed because the said ratio is below the said upper limit. However, these are only examples of the above ratios.
• the flame-retardant insulating sheet (1) may further contain a coloring material in addition to the polycarbonate resin and the flame retardant.
• the flame-retardant insulating sheet (1) is colored by containing the coloring material and has concealing properties, so it is suitable as a flame-retardant insulating sheet provided between circuit boards in electric/electronic devices. be.
• the flame-retardant insulating sheet (1) further contains a coloring material in addition to the polycarbonate resin and the flame retardant
• the flame-retardant insulating sheet (1) contains the polycarbonate resin, the flame retardant and the coloring material. It can be produced using the flexible resin composition (1).
• the coloring material contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) may be, for example, a known coloring material used in combination with a thermoplastic resin.
• the coloring material include coloring materials for imparting concealability to the flame-retardant insulating sheet (1) containing the coloring material.
• "Hiding property" means the degree to which the base is not seen through.
• a coloring material having a high hiding property has a high ability to hide the underlying color.
• coloring material contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) include organic pigments, inorganic pigments, and dyes.
• the colorant contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) is preferably a black colorant in terms of imparting higher concealment to the flame-retardant insulating sheet (1).
• the black colorant include carbon black, titanium black, iron oxide, and graphite.
• the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) may contain only one colorant, or two or more colorants. Any combination and ratio thereof can be selected.
• the coloring material contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) is carbon black. is preferably
• the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) further contain a coloring material in addition to the polycarbonate resin and the flame retardant, the content of the coloring material with respect to the content of the polycarbonate resin.
• the amount ratio is preferably 0.01 to 0.25% by mass, for example, may be 0.01% by mass or more and less than 0.15% by mass, or 0.15 to 0.25% by mass may be
• the flame-retardant insulating sheet (1) has higher flame retardancy and higher hiding power. Excessive use of the coloring material is suppressed when the ratio is equal to or less than the upper limit.
• the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) may contain a silicate compound.
• the ratio of the content of the silicate compound to the content of the polycarbonate resin is preferably less than 2% by mass, It is more preferably less than 1% by mass, even more preferably less than 0.5% by mass, even more preferably less than 0.1% by mass, and particularly preferably 0% by mass.
• the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) are, if necessary, the polycarbonate resin, the flame retardant, the coloring material, and It may contain other components that do not correspond to any of the above.
• the other components can be arbitrarily selected according to the purpose and are not particularly limited.
• Examples of the other components include other resins that do not fall under the polycarbonate resin, and various additives known in the art that do not fall under the category of silicate compounds.
• the other components contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) may be one kind, may be two or more kinds, or may be two or more kinds. In that case, their combination and ratio can be arbitrarily selected.
• Examples of the other resins contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) include polyolefin, polyester, polyethylene terephthalate, polyarylate, polybutylene terephthalate, polylactic acid, and styrene-based copolymer. Copolymers (copolymers having structural units derived from styrene), polyacetals, polyamides, polyphenylene ethers, polyphenylene sulfides, polymethyl methacrylates, cellulose ester resins, and the like.
• polystyrene resin examples include high-density polyethylene, polypropylene, polybutene, ethylene-(meth)acrylic acid copolymer, ethylene-methyl(meth)acrylate copolymer, ethylene-ethyl(meth)acrylate copolymer, ethylene- vinyl acetate copolymer, maleic anhydride-modified polyethylene, carboxylic acid-modified polyethylene, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, and the like.
• (meth)acrylic acid is a concept that includes both “acrylic acid” and “methacrylic acid”.
• the other resins contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) may be one kind, two or more kinds, or two or more kinds. In that case, their combination and ratio can be arbitrarily selected.
• additives contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) include stabilizers, lubricants, processing aids, antistatic agents, antioxidants, neutralizers, ultraviolet Examples include absorbents, dispersants, thickeners, and the like.
• the additives contained in the flame-retardant insulating sheet (1) and the flame-retardant resin composition (1) may be of only one type, or may be of two or more types. , their combination and ratio can be arbitrarily selected.
• the ratio of the total content of the polycarbonate resin and the flame retardant to the total mass of the flame-retardant insulating sheet (1) (([flame-retardant insulating sheet (1) Content of polycarbonate resin (parts by mass)] + [content of flame retardant in flame-retardant insulating sheet (1) (parts by mass)]) / [total mass of flame-retardant insulating sheet (1) (parts by mass) ] ⁇ 100) is preferably 80% by mass or more, more preferably 90% by mass or more, for example, 95% by mass or more, 97% by mass or more, and 99% by mass or more good too.
• the ratio is usually the ratio of the total content of the polycarbonate resin and the flame retardant to the total content (parts by mass) of the components that do not vaporize at room temperature in the flame-retardant resin composition (1) (( [Content of polycarbonate resin in flame-retardant resin composition (1) (parts by mass)] + [content of flame retardant in flame-retardant resin composition (1) (parts by mass)]) / [flame-retardant resin It is the same as the total content of components that do not vaporize at room temperature in composition (1) (parts by mass)] ⁇ 100).
• the ratio of the content of the other components to the total mass of the flame-retardant insulating sheet (1) is preferably 20% by mass or less, and 10% by mass or less. is more preferable, and may be, for example, 5% by mass or less, 3% by mass or less, or 1% by mass or less.
• the ratio is usually the ratio of the content of the other components ([flame-retardant resin composition ( Content of other components in 1) (parts by mass)]/[Total content of components that do not vaporize at room temperature in flame-retardant resin composition (1) (parts by mass)] ⁇ 100).
• the Spc of one side or both sides of the flame-retardant insulating sheet (1) is 200 (1/mm) or more, for example, 400 (1/mm) or more, 600 (1/mm) or more, and 700 (1/mm) or more. (1/mm) or more.
• the Spc is equal to or higher than the lower limit, the point of contact with other objects becomes sharp, so sticking of the flame-retardant insulating sheet (1) when stored in a pile is suppressed. be.
• the Spc of the sheet surface is a value measured in accordance with ISO 25178, not limited to the case of the flame-retardant insulating sheet (1).
• the upper limit of Spc on one side or both sides of the flame-retardant insulating sheet (1) is not particularly limited.
• the Spc is preferably 2100 (1/mm) or less in that the Spc does not become excessive and the flame-retardant insulating sheet (1) can be more easily produced.
• Spc of one side or both sides of the flame-retardant insulating sheet (1) is, for example, 200 to 2100 (1/mm), 400 to 2100 (1/mm), 600 to 2100 (1/mm), and It may be anywhere from 700 to 2100 (1/mm).
• the Spc of both surfaces of the flame-retardant insulating sheet (1) may be the same or different regardless of whether each is 200 (1/mm) or more.
• At least one surface (Spc of 200 (1/mm) or more) of the flame-retardant insulating sheet (1) preferably has a 60° glossiness of 25 or less, for example, 20 or less, 15 or less. , and 10 or less.
• the 60° glossiness of one or both surfaces of the flame-retardant insulating sheet (1) is equal to or less than the upper limit, the smoothness of the surface is further suppressed, and the flame-retardant insulating sheet (1) is improved. , sticking when stored in piles is further suppressed.
• the 60° glossiness of the surface of the sheet is a value measured according to JIS Z8741.
• the lower limit of the 60° glossiness of one side or both sides (Spc of 200 (1/mm) or more) of the flame-retardant insulating sheet (1) is not particularly limited.
• the 60° glossiness is preferably 5 or more from the viewpoint that the low 60° glossiness does not become excessive and the flame-retardant insulating sheet (1) can be more easily produced.
• the 60° glossiness of one side or both sides (Spc of 200 (1/mm) or more) of the flame-retardant insulating sheet (1) is, for example, 5 to 25, 5 to 20, 5 to 15. , and any of 5 to 10.
• the 60° glossiness of both surfaces of the flame-retardant insulating sheet (1) may be the same or different.
• the thickness of the flame-retardant insulating sheet (1) is not particularly limited and can be arbitrarily selected according to the purpose.
• the thickness of the flame-retardant insulating sheet (1) is preferably 30-900 ⁇ m, and may be any one of 300-600 ⁇ m, 600-900 ⁇ m, and 400-500 ⁇ m.
• the flame-retardant insulating sheet (1) is flame-retardant and can meet the UL94 vertical flammability test V-0 standard.
• the flame-retardant insulating sheet (1) is produced by, for example, using the flame-retardant resin composition (1) and applying a known molding method such as a calendering method, an extrusion method, a pressing method, or a casting method to obtain a resin sheet. can be manufactured by forming At this time, the resin sheet obtained above may be used as the flame-retardant insulating sheet (1) as it is. Alternatively, one side or both sides of the resin sheet obtained above is brought into contact with, for example, a heated press plate whose surface condition is adjusted, the resin sheet is heated and pressed by the press plate, and the surface condition of the press plate is changed. By transferring onto one side or both sides of a resin sheet, a flame-retardant insulating sheet (1) in which the Spc of one side or both sides satisfies the above conditions (Spc is adjusted) can be produced.
• a known molding method such as a calendering method, an extrusion method, a pressing method, or a casting
• the 60° glossiness of one or both surfaces of the flame-retardant insulating sheet (1) is also obtained by transferring the surface state of the press plate to these surfaces in the same manner as in the above adjustment of Spc. Adjustable.
• a flame-retardant insulating sheet according to one embodiment of the present invention contains a polycarbonate resin and a flame retardant, the flame retardant comprises a nitrogen-containing compound, and the peaks of at least one surface of the flame-retardant insulating sheet Density (Spd) is 8000 (1/mm 2 ) or more (in this specification, this flame-retardant insulating sheet may be referred to as “flame-retardant insulating sheet (2)”).
• "Mountain vertex density (Spd)" means the number of peak points per unit area. A large Spd indicates a large number of contact points with other objects.
• the flame-retardant insulating sheet (flame-retardant insulating sheet (2)) of the present embodiment has flame-retardant and insulating properties, it is suitable as a flame-retardant insulating sheet provided between circuit boards in electric/electronic devices. is. Since the flame-retardant insulating sheet (2) has an Spd of 8000 (1/mm 2 ) or more on at least one surface thereof, the number of contact points with other objects increases and the contact area decreases. Sticking is suppressed when the sheets are stacked and stored. For example, a long flame-retardant insulating sheet (2) is rolled and stored, and a non-long flame-retardant insulating sheet (2) is stacked and stored in its thickness direction. In both case and case, sticking of the flame-retardant insulating sheet (2) is suppressed.
• the flame-retardant insulating sheet (2) may further contain a coloring material in addition to the polycarbonate resin and the flame retardant.
• the flame-retardant insulating sheet (2) is colored by containing the coloring material and has concealing properties, so it is suitable as a flame-retardant insulating sheet provided between circuit boards in electric/electronic devices. be.
• the flame-retardant insulating sheet (2) uses a flame-retardant resin composition containing the polycarbonate resin and a flame retardant (in this specification, may be referred to as "flame-retardant resin composition (2)").
• the flame-retardant insulating sheet (2) can be manufactured by When the flame-retardant insulating sheet (2) further contains a coloring material in addition to the polycarbonate resin and the flame retardant, the flame-retardant insulating sheet (2) contains the polycarbonate resin, the flame retardant and the coloring material. It can be produced using the flexible resin composition (2).
• the flame-retardant resin composition (2) is, if necessary, other components that do not fall under any of the polycarbonate resin, the flame retardant, and the coloring material, as long as the effects of the present invention are not impaired. may contain
• the polycarbonate resin, the flame retardant, the coloring material and the other components contained in the flame-retardant insulating sheet (2) and the flame-retardant resin composition (2) are the flame-retardant insulating sheet (1) and the flame-retardant resin composition (2), respectively. It is the same as the polycarbonate resin, the flame retardant, the coloring material and the other components contained in the flame-retardant resin composition (1).
• the flame-retardant resin composition (2) may be the same as the flame-retardant resin composition (1), and detailed description thereof will be omitted.
• the peak density (Spd) of at least one surface of the flame-retardant insulating sheet (2) is 8000 (1/mm 2 ) or more, for example, 10000 (1/mm 2 ) or more, 12000 (1/mm 2 ) or more. mm 2 ) or more, or 15000 (1/mm 2 ) or more.
• the upper limit of Spd on one side or both sides of the flame-retardant insulating sheet (2) is not particularly limited.
• the Spd is preferably 22000 (1/mm 2 ) or less from the viewpoint that the Spd is not excessive and the flame-retardant insulating sheet (2) can be more easily produced.
• Spd of one side or both sides of the flame-retardant insulating sheet (2) is, for example, 8000 to 22000 (1/mm 2 ), 10000 to 22000 (1/mm 2 ), 12000 to 22000 (1/mm 2 ), and 15000 to 22000 (1/mm 2 ).
• the Spd of both surfaces of the flame-retardant insulating sheet (2) may be the same or different regardless of whether they are 8000 (1/mm 2 ) or more.
• the flame-retardant insulating sheet (2) has the above-described flame-retardant insulating sheet (1) except that at least one surface thereof satisfies the above Spd condition instead of the above-described Spc condition. ) may be the same as
• the flame-retardant insulating sheet (2) is flame-retardant and can meet the UL94 vertical flammability test V-0 standard.
• the 60° glossiness of at least one surface of the flame-retardant insulating sheet (2) is preferably 25 or less, for example, 20 or less, 15 or less, and 10 or less.
• the 60° glossiness of one or both surfaces of the flame-retardant insulating sheet (2) is equal to or less than the upper limit, the smoothness of the surface is further suppressed, and the flame-retardant insulating sheet (2) is improved. , sticking when stored in piles is further suppressed.
• the lower limit of the 60° glossiness of one side or both sides (Spd of 8000 (1/mm 2 ) or more) of the flame-retardant insulating sheet (2) is not particularly limited.
• the 60° glossiness is preferably 5 or more in that the low 60° glossiness does not become excessive and the flame-retardant insulating sheet (2) can be more easily produced.
• the 60° glossiness of one side or both sides of the flame-retardant insulating sheet (2) (the side with Spd of 8000 (1/mm 2 ) or more) is, for example, 5 to 25, 5 to 20, 5 to 15, and may be any of 5-10.
• the 60° glossiness of both surfaces of the flame-retardant insulating sheet (2) may be the same or different.
• the thickness of the flame-retardant insulating sheet (2) is not particularly limited and can be arbitrarily selected according to the purpose.
• the thickness of the flame-retardant insulating sheet (2) is preferably 30-900 ⁇ m, and may be any one of 300-600 ⁇ m, 600-900 ⁇ m, and 400-500 ⁇ m.
• the flame-retardant insulating sheet (2) is produced by, for example, using the flame-retardant resin composition (2) and applying a known molding method such as a calendering method, an extrusion method, a pressing method, or a casting method to obtain a resin sheet. can be manufactured by forming At this time, the resin sheet obtained above may be used as the flame-retardant insulating sheet (2) as it is. Alternatively, one side or both sides of the resin sheet obtained above is brought into contact with, for example, a heated press plate whose surface condition is adjusted, the resin sheet is heated and pressed by the press plate, and the surface condition of the press plate is changed. By transferring onto one side or both sides of a resin sheet, a flame-retardant insulating sheet (2) having Spd on one side or both sides satisfying the above conditions can be produced.
• the 60° glossiness of one or both surfaces of the flame-retardant insulating sheet (2) is also obtained by transferring the surface state of the press plate to these surfaces in the same manner as in the above adjustment of Spd. Adjustable.
• a flame-retardant insulating sheet according to one embodiment of the present invention contains a polycarbonate resin and a flame retardant, wherein the flame retardant comprises a nitrogen-containing compound, and at least one surface of the flame-retardant insulating sheet has a gloss of 60°. degree is 25 or less (in this specification, this flame-retardant insulating sheet may be referred to as "flame-retardant insulating sheet (3)").
• “60° glossiness” means the intensity ratio between incident light and specularly reflected light (reflected light with the same incident angle and reflection angle) when an object is irradiated with light at an incident angle of 60°.
• the flame-retardant insulating sheet (flame-retardant insulating sheet (3)) of the present embodiment has flame-retardant and insulating properties, it is suitable as a flame-retardant insulating sheet provided between circuit boards in electric/electronic devices. is.
• the flame-retardant insulating sheet (3) has a 60° glossiness of 25 or less on at least one surface thereof, so that the smoothness of the surface is suppressed, and sticking is suppressed when stacked and stored. be.
• a long flame-retardant insulating sheet (3) is wound into a roll and stored, and a non-long flame-retardant insulating sheet (3) is stacked in its thickness direction and stored. In both case and case, sticking of the flame-retardant insulating sheet (3) is suppressed.
• the flame-retardant insulating sheet (3) may further contain a coloring material in addition to the polycarbonate resin and the flame retardant.
• the flame-retardant insulating sheet (3) is colored by containing the coloring material and has a concealing property, so it is suitable as a flame-retardant insulating sheet provided between circuit boards in electrical/electronic equipment. be.
• the flame-retardant insulating sheet (3) uses a flame-retardant resin composition containing the polycarbonate resin and a flame retardant (in this specification, may be referred to as "flame-retardant resin composition (3)").
• the flame-retardant insulating sheet (3) contains a coloring material in addition to the polycarbonate resin and the flame retardant
• the flame-retardant insulating sheet (3) contains the polycarbonate resin, the flame retardant and the coloring material. It can be produced using the flexible resin composition (3).
• the flame-retardant resin composition (3) is, if necessary, other components that do not fall under any of the polycarbonate resin, the flame retardant, and the coloring material, as long as the effects of the present invention are not impaired. may contain
• the polycarbonate resin, the flame retardant, the coloring material and the other components contained in the flame-retardant insulating sheet (3) and the flame-retardant resin composition (3) are the flame-retardant insulating sheet (1) and the flame-retardant resin composition (3), respectively. It is the same as the polycarbonate resin, the flame retardant, the coloring material and the other components contained in the flame-retardant resin composition (1).
• the flame-retardant resin composition (3) may be the same as the flame-retardant resin composition (1), and detailed description thereof will be omitted.
• the 60° glossiness of at least one surface of the flame-retardant insulating sheet (3) is 25 or less, and may be, for example, 20 or less, 15 or less, or 10 or less.
• the 60° glossiness of one or both surfaces of the flame-retardant insulating sheet (3) is equal to or less than the upper limit, the smoothness of the surface is further suppressed, and the flame-retardant insulating sheet (3) is improved. , sticking when stored in piles is further suppressed.
• the lower limit of the 60° glossiness of one side or both sides of the flame-retardant insulating sheet (3) is not particularly limited.
• the 60° glossiness is preferably 5 or more in that the low 60° glossiness does not become excessive and the flame-retardant insulating sheet (3) can be more easily produced.
• the 60° glossiness of one side or both sides of the flame-retardant insulating sheet (3) may be, for example, any of 5-25, 5-20, 5-15, and 5-10.
• the 60° glossiness of both surfaces of the flame-retardant insulating sheet (3) may be the same or different regardless of whether they are 25 or less.
• the flame-retardant insulating sheet (3) has the above-described flame-retardant insulating sheet (3) except that at least one surface thereof satisfies the above 60° gloss condition instead of the above-described Spc condition. It may be the same as sheet (1).
• the flame-retardant insulating sheet (3) is flame-retardant and can meet the UL94 vertical flammability test V-0 standard.
• the thickness of the flame-retardant insulating sheet (3) is not particularly limited and can be arbitrarily selected according to the purpose.
• the thickness of the flame-retardant insulating sheet (3) is preferably 30-900 ⁇ m, and may be any one of 300-600 ⁇ m, 600-900 ⁇ m, and 400-500 ⁇ m.
• the flame-retardant insulating sheet (3) is produced by, for example, using the flame-retardant resin composition (3) and applying a known molding method such as a calendering method, an extrusion method, a pressing method, or a casting method to obtain a resin sheet. can be manufactured by forming At this time, the resin sheet obtained above may be used as the flame-retardant insulating sheet (3) as it is. Alternatively, one side or both sides of the resin sheet obtained above is brought into contact with, for example, a heated press plate whose surface condition is adjusted, the resin sheet is heated and pressed by the press plate, and the surface condition of the press plate is changed. By transferring to one side or both sides of the resin sheet, the flame-retardant insulating sheet (3) satisfying the above-mentioned conditions can be produced with the 60° glossiness of one side or both sides.
• a known molding method such as a calendering method, an extrusion method, a pressing method, or a casting method to obtain a resin sheet
• a flame-retardant insulating sheet (1) having an Spc of 200 (1/mm) or more has a 60° glossiness of 25 or less.
• a flame-retardant insulating sheet (1) and a flame-retardant insulating sheet (2) having a surface Spd of 8000 (1/mm 2 ) or more and having a 60° glossiness of 25 or less. (2) can be mentioned.
• both the flame-retardant insulating sheet (1) satisfying the above relationship between Spc and 60° glossiness and the flame-retardant insulating sheet (2) satisfying both the above relationship between Spd and 60° glossiness are , has a very limited configuration.
• An electric/electronic device is provided by the flame-retardant insulating sheet according to one embodiment of the present invention described above, that is, the flame-retardant insulating sheet (1) and the flame-retardant insulating sheet (2). ) and the flame-retardant insulating sheet (3).
• An example of the electric/electronic device of the present embodiment includes an electric/electronic device configured by sandwiching the flame-retardant insulating sheet between circuit boards. In such an electrical/electronic device, the flame-retardant insulating sheet prevents short circuits between circuit boards.
• Example 1 ⁇ Manufacturing flame-retardant insulating sheet>> Using a twin-screw extruder, the PC(1) (100 parts by mass) and the MC(1) (6 parts by mass) were melt-kneaded to produce pellets corresponding to the flame-retardant resin composition. Using a co-rotating twin-screw extruder, a T-shaped die, etc., the obtained pellets were extruded into a sheet, and the thickness thereof was adjusted. A pair of press plates were provided. The Spc measured according to ISO 25178 for the surface of one of the press plates is 1400 (1/mm), and the Spc measured according to ISO 25178 for the surface of the other press plate is 1900. (1/mm).
• the sheet obtained above is sandwiched between a pair of press plates having the above Spc, and the press plates are heated to about 180°C using a hot press, and pressurized while melting PC (1) to rapidly cool. By doing so, a desired flame-retardant insulating sheet (thickness: 400 ⁇ m) was obtained.
• Comparative Example 1 sticking of the flame-retardant insulating sheet was not suppressed.
• the Spc was 76 (1/mm), the Spd was less than the detection limit, and the 60° glossiness was 34.
• the present invention can be used as a flame-retardant insulating sheet provided between circuit boards in electrical/electronic equipment (for example, high-voltage equipment such as industrial power supplies and in-vehicle equipment).
• electrical/electronic equipment for example, high-voltage equipment such as industrial power supplies and in-vehicle equipment.

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• 2022
  • 2022-12-16 JP JP2023567854A patent/JP7754202B2/ja active Active
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