High temperature paper

D - Textiles – Paper – 21 – H

Patent

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Details

D21H 27/30 (2006.01) D21H 27/38 (2006.01) D21H 13/26 (2006.01) D21H 17/36 (2006.01)

Patent

CA 2481840

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.

La présente invention concerne une structure de papier qui comprend deux couches externes et au moins une couche interne. Les deux couches externes comprennent une fibre de pâte à papier sensiblement cellulosique et la couche interne comprend une fibre réfractaire et un liant polymère, et de préférence une fibre de pâte à papier cellulosique. Dans un mode de réalisation préféré de l'invention, la structure comprend au moins trois couches internes, toutes constituées de fibre de pâte à papier cellulosique, de fibre réfractaire et de liant polymère. La structure de papier obtenue trouve des utilisations notamment en tant que papier réfractaire pour transformateur dans le cadre de la réalisation de transformateurs.

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