Reactive adhesive, laminate, and package

Abstract

Provided are: a reactive adhesive containing a polyol composition (A) and a polyisocyanate composition (B), wherein the water contact angle on the surface of a dry coating, obtained by coating 3.0 g / m2 of the polyol composition (A) in terms of solid material on a polyethylene terephthalate film, is at least 65 degrees; a laminate in which a plurality of sheets of film or paper are bonded with theadhesive; and a laminate or package in which the adhesive is the reactive adhesive. The polyol composition (A) is preferably (1) a reaction product of a polyhydric alcohol and a polybasic acid havingan alkyl side chain having 6 or more carbon atoms, or a reaction product of a polybasic acid and a polyhydric alcohol having an alkyl side chain having 6 or more carbon atoms, or (2) a mixture of a reaction product of a polyhydric alcohol and a polybasic acid and a polyhydric alcohol having an alkyl side chain having 6 or more carbon atoms or a polybasic acid having an alkyl side chain having 6 ormore carbon atoms.

Description

technical field [0001] The present invention relates to a reactive adhesive, a laminate and a package using the reactive adhesive. Background technique [0002] Conventionally, lamination of various plastic films, or lamination (lamination) of plastic films, metal vapor-deposited films, and metal foils has been used in various applications, such as packaging of food, pharmaceuticals, and daily necessities. Materials, protective wall materials, roof materials, solar panel materials, battery packaging materials, window materials, outdoor floor materials, lighting protection materials, automotive parts, billboards, stickers and other outdoor industrial applications, injection molding simultaneous decoration methods, etc. Use for decorative purposes, etc. [0003] For these laminates, various plastic films, metal vapor-deposited films, or metal foils are appropriately combined according to the required properties in various applications, and an adhesive corresponding to the req...

AI Technical Summary

Problems solved by technology

However, under such high-speed coating (also called high-speed processing) conditions, it goes without saying that solvent-free reactive adhesives that do not use organic solvents, even dry lamination that can use organic solvents for viscosity adjustment In the reactive adhesive of the type, there is also the problem that orange peel, white, streak, and bubble appearance defects are likely to occur depending on the base material.

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