EASILY RELEASABLE LAMINATED FILM

PURPOSE:To obtain the title film which can be imparted with a favorable air- permeability as required by a method wherein, at least one side of the surfaces of a synthetic resin film without penetrated hole to a synthetic resin film with perforations is processed by corona discharge and the two film...

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Bibliographic Details
Main Authors TSUBATA SEIICHIRO, NAGAMATSU MIKIHARU, KODAMA EIJI
Format Patent
LanguageEnglish
Published 08.05.1989
Subjects
LAYERED PRODUCTS
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
PERFORMING OPERATIONS
TRANSPORTING
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Summary:PURPOSE:To obtain the title film which can be imparted with a favorable air- permeability as required by a method wherein, at least one side of the surfaces of a synthetic resin film without penetrated hole to a synthetic resin film with perforations is processed by corona discharge and the two films are laminated together, while setting the bonding strength of the interface of the two films at 5-100g/20mm width. CONSTITUTION:A penetration-holed synthetic resin film 1 having a plurality of perforations 3 is faced to a synthetic resin film 2 without penetration hole. At least one surface facing each other is processed by corona discharge followed by the lamination of the two films. At that time, the bonding strength at the interface 4 of the films 1 and 2 is set at 5-100g/20mm width. By such a structure, a double layered film for packaging, which can be imparted with a favorable air-permeability as necessary, and easily releasable under a specific use condition, is obtained.
Bibliography:Application Number: JP19870272528