METHOD FOR PRODUCING RESIN FILM

WIPO Patent Application WO/2022/215723

A1

This method for producing a resin film comprises the following steps. A step for preparing, as a starting material, at least either a film label that comprises an ink layer and a resin layer or a resin bottle to which the film label is fitted; a step for recovering a thermoplastic resin having a specific gravity of less than 1 from the starting material; and a step for obtaining a resin film having a specific gravity of less than 1 by means of extrusion molding, while having a molding material contain the recovered thermoplastic resin. The step for recovering a thermoplastic resin having a specific gravity of less than 1 comprises the following sub-steps. A sub-step in which the starting material or the resin layer is divided into individual pieces; a sub-step in which the ink layer is removed from the film label or each piece of the film label, thereby obtaining the resin layer or pieces of the resin layer, from each of which the ink layer has been removed; and a sub-step in which the starting material, the resin layer or pieces of the starting material or the resin layer are subjected to specific gravity separation, thereby recovering the starting material, the resin layer or the pieces of the starting material or the resin layer, each having a specific gravity of less than 1.

TAKAICHI JUN (JP)
WATANABE NOBUHIRO (JP)
KIBAYASHI TATSUYA (JP)
KAMEI KENSUKE (JP)

PCT/JP2022/017248

October 13, 2022

April 07, 2022

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GUNZE KK (JP)

B32B27/00; B29B17/02; B29C48/21; B32B7/027; B32B7/028; B32B27/20; B32B27/32; B65D65/40; C08L23/08; C08L45/00; C08L57/02

JPH11333952A	1999-12-07
JP2007090876A	2007-04-12

TACHIBANA, Kenji et al. (JP)

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