Reconstituted mica materials, reconstituted mica prepreg materia

Details Reconstituted mica materials, reconstituted mica prepreg materia Reconstituted mica materials, reconstituted mica prepreg materia

1984-06-18

1986-03-18

Schofer, Joseph L.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428283, 428324, 428363, 428454, 524449, 174120C, 174137B, B32B 1904

Patent

active

045768560

ABSTRACT:
A reconstituted mica material produced by sheet forming a slurry containing mica flakes prepared by disintegrating unfired mica and comprising (i) mica flakes having a particle size of 1.7 mm or more and an aspect ratio of 150 or more, (ii) mica flakes having a particle size of 1.0 mm or more and less than 1.7 mm and an aspect ratio of 150 or more, (iii) mica flakes having a particle size of 0.25 mm or more and less than 1.0 mm and an aspect ratio of 100 or more, and (iv) mica flakes having a particle size of less than 0.25 mm and an aspect ratio of 100 or more, in definite ranges, gives reconstituted mica prepreg materials, reconstituted mica products and insulated coils having excellent mechanical and electrical properties.

REFERENCES:
patent: 3026222 (1962-03-01), Rogers, Jr. et al.
patent: 3133217 (1964-05-01), Wohlferth et al.
patent: 3470045 (1969-09-01), Bronnvall et al.
patent: 3618753 (1971-11-01), Glasspoole
patent: 4085250 (1978-04-01), Smith
patent: 4491618 (1985-01-01), Kuwajima et al.

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