Dic Corporation

Yutaka Hamasuna

Yasuhiro Sente

Yoshitomo Nagata

Takashi Mihara

Shin-ichi Ohara

Choichi Takada

Hiroshi Ebato

Hideyasu Teramoto

Hideoki Iwanami

Takashi Tamaoka

Shin-Ichi Ohara

Provided are a laminating adhesive, a laminate, and a packaging material which are excellent in retorting resistance and content resistance. The adhesive includes a polyol composition (A) including a polyester polyol (A1), and a polyisocyanate composition (B) including a polyisocyanate compound (B1), in which the polyester polyol (A1) is a reaction product of a composition including a polycarboxylic acid and a polyhydric alcohol, the polycarboxylic acid including a tetramer acid. The laminate and the packaging material are produced using the adhesive.

Adhesive, laminate, and packaging material

A method for separating and recovering a layered film laminated and adhered with a reactive adhesive, the method including a step 1 of immersing the layered film in an alkaline solution while stirring the layered film with heating at 20° C. to 90° C. or ultrasonically vibrating the layered film and a step 2 of recovering separated single-layered films that constitute the respective layers of the layered film. The reactive adhesive is preferably a reactive adhesive containing a polyisocyanate composition and a polyol composition and more preferably a reactive adhesive containing a polyisocyanate composition, a polyol composition, and a compound having an acidic group.

Separation/recovery method for laminated film

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Tokyo, Japan

Yutaka Hamasuna