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Liquid composition, ferroelectric insulation sheet, and method for producing same

A technology of composition and insulating sheet, applied in insulators, insulators, organic insulators, etc., can solve the problems of brittleness and low flexibility, and achieve the effect of high flexibility and high uniform dielectric properties

Pending Publication Date: 2021-10-26
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the ceramic sintered body has proble

Method used

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  • Liquid composition, ferroelectric insulation sheet, and method for producing same
  • Liquid composition, ferroelectric insulation sheet, and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0179] Example

[0180] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples.

[0181] 1. Preparation of Components and Components

[0182] [polymer]

[0183] F Polymer 1: A copolymer containing TFE-based units, NAH-based units, and PPVE-based units in the order of 98.0 mol%, 0.1 mol%, and 1.9 mol% (melting temperature: 300°C, melting temperature at 380°C Viscosity: 3×10 5 Pa s)

[0184] F Polymer 2: A copolymer without functional groups containing TFE-based units and PPVE-based units in the order of 97.5 mol% and 2.5 mol% (melting temperature: 305°C, melt viscosity at 380°C: 3×10 5 Pa s)

[0185] PTFE1: Homopolymer of TFE (melting temperature: 327°C, melt viscosity at 380°C: 2×10 9 Pa·s or above)

[0186] PVDF1: Solvent-soluble polyvinylidene fluoride

[0187] [powder]

[0188] F powder 1: powder composed of F polymer 1 with an average particle size of 2.6 μm

[0189] F powder 2: powder composed of ...

Example

[0199] (example 1)

[0200] After the N-methyl-2-pyrrolidone (NMP) of 38.5 mass parts, the nonionic fluorinated polyhydric alcohol of 1.5 mass parts, the F powder 1 of 30 mass parts, and the inorganic filler 1 of 30 mass parts are dropped in the tank, Put zirconia balls into the tank. Thereafter, the tank was rolled at 150 rpm for 1 hour to disperse F powder 1 and inorganic filler 1 in NMP to prepare dispersion 1.

[0201] Thereafter, the dispersion liquid 1 is coated on the surface of the metal foil 1 by a die coating method in a roll-to-roll manner to form a wet film. Thereafter, the metal foil 1 on which the wet film was formed was passed through a drying oven at 140° C. for 5 minutes, and dried by heating. Thereafter, the dried film was heated and fired at 380° C. for 10 minutes in a nitrogen furnace. Thereby, the laminated body 1 in which the FE sheet was formed on the surface of the metal foil 1 was produced. In addition, the thickness of the FE sheet was 50 μm.

Example

[0202] (Example 2)

[0203] Except having changed the inorganic filler 1 into the inorganic filler 2, the dispersion liquid 2 was prepared similarly to Example 1, and the laminated body 2 was obtained.

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Abstract

Provided are: a liquid composition from which a ferroelectric insulation sheet can be produced that has excellent flexibility, dielectric properties including a high dielectric constant and a low dielectric loss tangent, and bondability or adhesiveness; a method for producing a ferroelectric insulation sheet using said liquid composition; and a ferroelectric insulation sheet having excellent flexibility, the above-mentioned dielectric properties, and adhesiveness or bondability. A liquid composition according to the present invention comprises: powder including a tetrafluoroethylene-based polymer having a melt viscosity of 1*102-1*106 Pa.s at 380 DEG C, and having an average particle diameter of 30 [mu]m or less; an inorganic filler having a dielectric constant of 10 or more at 25 DEG C; and a liquid dispersion medium, wherein the liquid composition has a viscosity of 50-10,000 mPa.s at 25 DEG C.

Description

technical field [0001] The present invention relates to a liquid composition comprising a highly melt-processable tetrafluoroethylene polymer and a ferroelectric inorganic filler, a ferroelectric insulating sheet, and a method for producing the same. Background technique [0002] With the miniaturization and high functionality of electronic devices such as mobile phones, studies are underway to embed electronic components mounted on printed wiring boards into substrates. [0003] A small and thin capacitor can be constructed by interposing a ferroelectric insulating sheet as a dielectric layer between a pair of electrodes. Conventionally, capacitors for embedding in printed wiring boards have mainly used ceramic sintered bodies as ferroelectric insulating sheets. [0004] However, the ceramic sintered body has problems of low flexibility and brittleness after thinning. In order to solve such a problem, it has been proposed to use a ferroelectric insulating sheet containing...

Claims

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Application Information

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IPC IPC(8): C08J3/02H01B17/56C08L27/18H01B3/00H01B3/44C08K3/013H01G4/20H01G4/32
CPCC08J3/02C08K3/013C08L27/18H01B3/00H01B3/44H01B17/56H01G4/20H01G4/32C08K7/02C08K7/18H01B3/445H01G4/206
Inventor 笠井涉细田朋也山边敦美寺田达也
Owner ASAHI GLASS CO LTD
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