PURPOSE: To obtain composite, which has satisfactory adhesion under use conditions and can easily be separated under non-use conditions, by a method wherein resin layer mainly made of simple or mixture of alginic acid and its derivatives is provided at joint interface between members.
CONSTITUTION: The composite concerned is produced by laminating film-or sheet-like member 2 and another film -or sheet-like member 3 to each other through primer layer 4 and adhesive layer 5. The members 2 and 3 are made of metal, synthetic resin, paper, glass, ceramic, wood or the like. The primer layer 4 is resin mainly made of simple or mixture of alginic acid and its derivatives such as sodium alginate, zince alginate, amino alginate or the like. At the adhesive layer 5, polyethylene, polypropylene, their mixture, polyurethane or the like is employed. The composite concerned is used for packaging liquid contents such as milk, juice drink or the like.
NAKANO TOSHIHIKO
SUGIYAMA ATSUNORI
