Importance

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Abstract

The present invention relates to a method of embossing a multi-layer film. In the method of embossing the multi-layer film using an embossing apparatus is used comprising a material supply unit for supplying at least one resin material, a T-plate for discharging the individually supplied materials into a film, a cooling roller for cooling and conveying for embossing a surface of the film the film discharged from the T-plate, an embossing roller conveyed from the cooling roller positioned at a predetermined interval from the T-plate and a transfer roller for transferring the embossed film, the cooling roller is formed to have a smooth outer surface so that one side of the film to be manufactured has high printability and transparency, the transfer roller conveys the film from the cooling roller and is positioned at a predetermined interval from the T-plate opposite the side where the embossing roller engages film conveyed from the cooling roller, and a vacuum suction chamber is longitudinally formed at the position where the film discharged from the T-plate comes into contact with the cooling roller to prevent entry of air or impurities between the cooling roller and the film, whereby the resin materials having different deformation temperatures supplied from the material supply unit are disposed through the T-plate into the film having a three-layer structure which includes a base film layer to be in contact with the cooling roller, an embossing film layer on which embossments are to be formed by bringing the embossing film layer into contact with the embossing roller and an adhesive film layer for adhesion between the base film layer. The embossing film layer, and the embossments are formed only on the embossing film layer of the film using the embossing roller which engages the film conveyed from the cooling roller, after which the film is cooled by the cooling roller and then separated therefrom through the transfer roller.

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First Claim