Patent ID: 6491783
Filing Date: 2002-12-10
Classification: B05C,B32B,C08G,C09J

Abstract:
A flexographic process for coating and laminating film, including the steps of:a) providing a coating and laminating system including: i) supply means for supplying mixed adhesive to a coating chamber; ii) return means for returning excess adhesive to a sump; iii) a first roller exposed to said coating chamber and receiving adhesive thereon; and iv) a second roller engaging said first roller, said second roller receiving adhesive from said first roller; b) providing an adhesive made up of Part A and Part B mixed together, wherein: i) Part A includes 12-99%, by weight, Bisphenol A or F Type Epoxy Resin; ii) Part B includes 6-99%, by weight, Amine Curing Agent; iii) said adhesive being 100% solids and composed of constituent ingredients substantially precluding said adhesive from imparting odors to food products packaged in films laminated with said adhesive; c) determining optimal stoichiometrical ratio between epoxy resin and curing agent; d) mixing parts A and B at a ratio such that the stoichiometrical ratio between epoxy resin and curing agent is at said optimal stoichiometrical ratio Â±50%, to form said adhesive; e) circulating said adhesive between said sump and said chamber; f) operating said rollers and thereby coating a first piece of film with adhesive; and g) laminating said first piece of film to a second piece of film.