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Electrically insulating resin sheet

An electrical insulation, resin sheet technology, used in insulators, insulators, organic insulators, etc., can solve the problems of reduced installation accuracy, reduced operation efficiency, and a lot of time and effort in installation, achieving excellent insulation, good precision, and heat resistance. Excellent effect

Inactive Publication Date: 2014-01-08
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the case of the above-mentioned mounting method, depending on the shape of the object, jigs, etc. will get in the way, and it becomes difficult to mount the insulating film on the object.
In addition, the installation operation requires a lot of time and effort, and therefore, there is also a problem that the operation efficiency is lowered
Furthermore, there is also a problem that mounting accuracy (accuracy of mounting position, etc.) decreases

Method used

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  • Electrically insulating resin sheet
  • Electrically insulating resin sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Add 667.7g N-methyl-2-pyrrolidone (NMP) in a 1000ml four-necked flask, heat to 70 degrees, add 250g polyetherimide (PEI) resin (manufactured by SABIC Innovative Plastics company, UItem1000, glass Transition temperature: 223° C., tensile breaking stress: 117 MPa, tensile modulus: 3138 MPa), and stirred for 5 hours to prepare a PEI resin solution.

[0110]To the prepared PEI resin solution, 30 parts by weight of polypropylene glycol with a weight average molecular weight of 400 was added to 100 parts by weight of the PEI resin, and stirred to prepare a transparent uniform solution. The homogeneous solution was coated on a PET film by comma direct coating, and then heated at 130° C. for 8 minutes to remove NMP by evaporation to obtain a phase-separated structure. The obtained phase-separated structure was placed in a 30 L pressure-resistant container, and carbon dioxide was injected in an atmosphere of 45°C. After pressurizing to 25 MPa, carbon dioxide was injected at a f...

Embodiment 2

[0112] An electrically insulating resin sheet was produced in the same manner as in Example 1, except that 60 parts by weight of polypropylene glycol with a weight average molecular weight of 400 was added to the prepared PEI resin solution relative to 100 parts by weight of the PEI resin.

Embodiment 3

[0114] Add 667.7g N-methyl-2-pyrrolidone (NMP) in the four-necked flask of 1000ml, be heated to 70 degree, add 250g polyethersulfone (PES) resin (BASF company manufactures therein, E2010, glass transition temperature: 225° C., tensile breaking stress: 68 MPa, tensile modulus: 2282 MPa), and stirred for 5 hours to prepare a PES resin solution.

[0115] To the prepared PES resin solution, 35 parts by weight of polypropylene glycol with a weight average molecular weight of 400 was added to 100 parts by weight of the PES resin, and stirred to prepare a transparent uniform solution. Then, an electrical insulating resin sheet was produced by the same method as in Example 1.

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Abstract

The purpose of the present invention is to provide an electrically insulating resin sheet having excellent heat resistance and insulating properties, and which, after being deformed in a predetermined shape by application of an external force, can maintain the predetermined shape even when the external force is removed. This electrically insulating resin sheet has a porosity of 10-60%, a stress relaxation percentage of at least 20% when stretched 5% at 23 DEG C and maintained in this state for 10 minutes, and a breakdown voltage of at least 25 kV / mm.

Description

technical field [0001] The present invention relates to an electrical insulating resin sheet, particularly an electrical insulating resin sheet used as an electrical insulator of a motor coil. Background technique [0002] In equipment such as motors, generators, and transformers, as insulators such as ground insulators (slots, spacers, wedges, etc.), interlayer insulators (coil interlayers, etc.), and conductor insulators, the most commonly used is polytene terephthalate. Ethylene glycol formate (PET) film. Especially in equipment such as high-voltage AC motors, industrial DC motors, and generators, the demand for heat resistance is increasing due to the trend of higher voltage, larger capacity, and smaller and lighter weight. As an insulator, H-class Super engineering plastics such as polyimide (PI), polysulfone (PSF), polyethersulfone (PES), polyetherimide (PEI), polyphenylene sulfide (PPS), and polyetheretherketone (PEEK) formed film. [0003] An electrically insulati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/56C08J9/26H01B3/30H01B3/42H01B17/60
CPCH02K1/04H02K3/34H01B3/30H01B3/301C08J5/18H01B3/427C08J2379/08H01B17/60B32B5/18C08J2381/06H01B3/306H01B3/42C08J9/28C08J2201/0464C08J2205/044C08J2207/06Y10T428/249953Y10T428/249991B23B27/00B32B5/24B32B27/065
Inventor 池永纮子笠置智之八锹晋平秋山恵子
Owner NITTO DENKO CORP