Insulating polyolefin laminate paper and method for producing sa

Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness

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162112, 162132, 162138, 428156, 428161, 428171, 428232, 4285375, 428511, 428162, B32B 300, B32B 2308, D03D 300

Patent

active

046736077

ABSTRACT:
An insulating polyolefin laminate paper and a method for producing such a paper in which first and second fiber paper layers are laminated to a polyolefin film layer. The fiber paper layers have an impermeability of 20 to 4000 Gurley-seconds. At least one of the fiber paper layers is mechanically deformed in such a manner that irregularities are produced having a depth of 2 to 50% of the thickness of the fiber paper layer. The mechanical deformation is accomplished prior to lamination. Before lamination, the water content of the fiber paper layers is controlled to be no more than 4%. Preferably, the thickness of the fiber paper layers is at least 30 microns. Furthermore, an electric power supply cable includes an insulating polyolefin laminate paper as an insulating layer.

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patent: 3294618 (1966-12-01), Busche et al.
patent: 3427394 (1969-02-01), McKean
patent: 3532800 (1970-10-01), Wyly et al.
patent: 3728465 (1973-04-01), Yasui et al.
patent: 4196044 (1980-04-01), Mussoni et al.
patent: 4487796 (1984-12-01), Lloyd et al.

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