Oil-impregnatable insulating board

Details Oil-impregnatable insulating board Oil-impregnatable insulating board

1981-04-27

1986-06-17

Chin, Peter

Paper making and fiber liberation

Processes and products

Multi-layer waterlaid webs or sheets

162132, 162133, 162138, 162146, D21H 102

Patent

active

045954577

ABSTRACT:
An aqueous slurry comprising fibrous particles of a heat-resistant aromatic polymer and short fibers made of said polymer or insulating inorganic short fibers, or a mixture thereof, is made into a wet web and, after adjusting the water content to 50 to 95 weight %, said wet web is laid up in a desired number of layers, and then the laminate is dewatered and dried for integration under pressure at a temperature not exceeding the softening point of said aromatic polymer, thereby obtaining an oil-impregnatable insulating board with high strength and capable of uniform impregnation of oil therein.

REFERENCES:
patent: 3915791 (1975-10-01), Langdon
patent: 4060451 (1977-11-01), Uchiyama et al.
patent: 4091058 (1978-05-01), Sander et al.
patent: 4096313 (1978-06-01), Fujita et al.

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