Method of producing an electrically charged film

Details Method of producing an electrically charged film Method of producing an electrically charged film

B - Operations, Transporting

29

C

B29C 71/00 (2006.01) B29C 47/00 (2006.01)

Patent

CA 2459873

A method of producing an electrically charged film includes the steps of forming a molten thermoplastic material into a web, electrically charging the web while the web is at a temperature substantially at or above a solidification temperature thereof, cooling the web below the solidification temperature thereof after charging and winding the web into individual rolls immediately following the cooling step.

L'invention concerne un procédé de production d'un film chargé électriquement, consistant à former une bande continue à partir d'une matière thermoplastique en fusion, à charger électriquement la bande continue lorsque sa température est sensiblement égale ou supérieure à la température de solidification de la matière thermoplastique, à refroidir la bande continue pour réduire sa température à une valeur inférieure à la température de solidification de la matière thermoplastique après que la bande continue a été chargée, et à enrouler la bande continue pour former des rouleaux individuels immédiatement après l'étape de refroidissement.

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