EP 0272497 B1 19930623 - LOW-DIELECTRIC CONSTANT PRESS BOARD FOR OIL IMPREGNATION INSULATION
Title (en)
LOW-DIELECTRIC CONSTANT PRESS BOARD FOR OIL IMPREGNATION INSULATION
Publication
Application
Priority
- JP 18092687 A 19870722
- JP 28330186 A 19861128
- JP 29579086 A 19861212
- JP 30975086 A 19861224
Abstract (en)
[origin: EP0272497A2] The present invention is directed to a low-dielectric constant press board for oil impregnation insulation which comprises a poly(4-methylpentene-1) fiber and/or a poly(3-methylbutene-1) fiber and a kraft pulp. This press board may be formed by first laminating the mixed wet sheets of the poly(4-methylpentene-1) fiber and/or the poly(3-methylbutene-1) fiber and the kraft pulp, and then heating/pressing the laminate integrally. In this case, the wet sheets of the kraft pulp (2) alone may be disposed over and under the mixed wet sheets (1), or over, under and between the mixed wet sheets. Further, the press board may additionally contain at least one selected from polyethylene terephthalate fibers and polyphenylene sulfide fibers in an amount of less than 28 wt%.
IPC 1-7
IPC 8 full level
D21H 27/38 (2006.01); H01B 3/00 (2006.01); H01B 3/18 (2006.01); H01B 3/42 (2006.01); H01B 3/52 (2006.01); D21H 11/04 (2006.01); D21H 13/10 (2006.01); D21H 13/14 (2006.01); D21H 13/24 (2006.01)
CPC (source: EP)
D21H 27/38 (2013.01); H01B 3/008 (2013.01); H01B 3/185 (2013.01); H01B 3/421 (2013.01); H01B 3/52 (2013.01); D21H 11/04 (2013.01); D21H 13/10 (2013.01); D21H 13/14 (2013.01); D21H 13/24 (2013.01)
Designated contracting state (EPC)
CH DE GB LI SE
DOCDB simple family (publication)
EP 0272497 A2 19880629; EP 0272497 A3 19900131; EP 0272497 B1 19930623; DE 3786335 D1 19930729; DE 3786335 T2 19930930
DOCDB simple family (application)
EP 87117570 A 19871127; DE 3786335 T 19871127