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Electrical insulation paper, methods of manufacture, and articles manufactured therefrom

A technology of electrical paper and products, applied in the direction of organic insulators, plastic/resin/wax insulators, papermaking, etc., can solve the problems of expensive aramid fiber paper, excessive burns, etc.

Inactive Publication Date: 2015-08-26
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, aramid fiber papers such as Nomex are relatively expensive and exhibit "heat-over-burn" for many of the applications in which they are used

Method used

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  • Electrical insulation paper, methods of manufacture, and articles manufactured therefrom
  • Electrical insulation paper, methods of manufacture, and articles manufactured therefrom
  • Electrical insulation paper, methods of manufacture, and articles manufactured therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0184] Material

[0185] Materials used in the examples are shown in Table 1.

[0186] Table 1

[0187] components

chemical description

source, seller

ULTEM9011

Polyetherimide (PEI)

SABIC Innovative Polymers

TWARON

Aramid fiber

Teijin Aramid BV

TWARON

Aramid fiber

Teijin Aramid BV

[0188] Twaron is a para-aramid polymer, specifically poly-p-phenylene terephthalamide (PpPTA), commercially available from Teijin Aramid BV.

[0189] Techniques and steps

[0190] Tensile strength was determined by ASTM D828.

[0191] Percent elongation was determined by ASTM D828.

[0192] Young's modulus was determined by ASTM D638.

[0193] Determination of Elmendorf Tear Strength by ASTM D1922

[0194] Samples were prepared according to the recipe shown in Table 2:

[0195] Table 2

[0196]

[0197] Papermaking technology: Fiber slurry is formed by combining fibers in water. The fibers were deposited on a screen to...

Embodiment approach 1

[0211] Embodiment 1. A fiber substrate, comprising a cured product of a fiber composition, based on the total weight of fibers in the fiber composition, the fiber composition comprising: polyimide fibers from about 10wt.% to about 65wt.%, about 10wt.% .% to about 30wt.% of fibers selected from aramid fibrids or polycarbonate fibers, about 25wt.% to about 70wt.% of aramid fibers; wherein the cured product has a value greater than 0 to less than 8 mil [203.2 microns / 0.2032mm] thickness.

Embodiment approach 2

[0212] Embodiment 2. Electrical paper including the fiber substrate of Embodiment 1.

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Abstract

A fibrous substrate comprising a consolidated product of a fiber composition is provided comprising polyimide fibers; fibers selected from aromatic polyamide fibrids or polycarbonate fibers; aromatic polyamide fibers. A process of preparing a fibrous substrate is disclosed, comprising forming a layer from a slurry comprising a suspension solvent; and fiber composition comprising a combination of polyimide fibers; aromatic polyamide fibers; aromatic polyamide fibrids; each based on the total weight of the fibers in the fiber composition; dewatering the layer; and consolidating the layer to form the fibrous substrate; wherein a layer of polyimide fiber aromatic polyamide fibrid is applied to each surface of the fibrous substrate either before or after said consolidating step, and the substrate and polyimide layers are together subjected to a consolidating step. In another embodiment, articles comprising the above fibrous substrates are provided.

Description

technical field [0001] The present disclosure relates to electrical insulating papers. Background technique [0002] Various types of electrical machines contain electrical insulating paper to non-conductively isolate live parts and electrical leads from non-conductive parts and housing elements. Electrical insulating papers are primarily manufactured from one of two materials: cellulose fibers or aramid fibers. Both materials have significant hygroscopicity, which has a detrimental effect on the electrical properties of the material as well as the system-level performance of the insulation system. Therefore, extensive drying practices and manufacturing considerations need to be observed to keep these materials sufficiently dry. [0003] Furthermore, cellulose paper has limited thermal properties such that natural cellulosic materials begin to exhibit significant long-term degradation during exposure to temperatures in excess of about 120°C. Furthermore, the cellulose deg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/34D21H25/04D21H13/26D21H17/00H01B3/52
CPCH01B3/48D21H17/72D21H13/26H01B3/52D21H13/20
Inventor 戴维·史密斯托马斯·阿杰伊本尼·伊齐基尔·戴维约翰·雷蒙德·克拉恩保罗·洛克耶丹尼斯·洛克耶埃里克·奥托·托伊奇彼得·詹姆斯·朱伯
Owner SABIC GLOBAL TECH BV
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