High temperature paper

Details High temperature paper High temperature paper

2006-09-26

2006-09-26

Hug, Eric (Department: 1731)

Paper making and fiber liberation

Processes and products

Multi-layer waterlaid webs or sheets

C162S123000, C162S132000, C162S146000, C162S157300, C162S164100, C156S181000, C156S182000, C428S479600, C428S573000, C442S412000, C442S416000

Reexamination Certificate

active

07112259

ABSTRACT:
Provided is a paper structure comprised of two outside layers and at least one inside layer. The two outside layers are comprised of substantially cellulosic pulp fiber, and the inside layer is comprised of a high temperature fiber and a polymeric binder, and preferably cellulosic pulp fiber. In a preferred embodiment, the structure comprises at least three inside layers, all comprised of cellulosic pulp fiber, high temperature fiber and a polymeric binder. The resulting paper structure finds particular use as a high temperature transformer paper in the manufacture of transformers.

REFERENCES:
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patent: 3681193 (1972-08-01), Nykopp
patent: 3756908 (1973-09-01), Gross
patent: 4267016 (1981-05-01), Okazaki et al.
patent: 4496583 (1985-01-01), Yamamoto et al.
patent: 4865691 (1989-09-01), White
patent: 5047469 (1991-09-01), Kitamura et al.
patent: 5166263 (1992-11-01), Ohgi et al.
patent: 5208104 (1993-05-01), Ueda et al.
patent: 5498314 (1996-03-01), Kinsley, Jr.
patent: 6544622 (2003-04-01), Nomoto
Search Report issued in International Application No. PCT/US02/38171, Jun. 2, 2003.

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