Composite container having foamed adhesive

Abstract

A multi-ply tubular container for products is provided having a first ply wrapped into a tubular shape and having an inner surface and a second ply wrapped into a tubular shape and having an outer surface positioned in face-to-face contact with the inner surface of the first ply. At least one of the first and second plies is a body ply formed of fibrous paperboard. A foamed adhesive is placed between the inner surface of the first ply and the outer surface of the second ply. The foamed adhesive reduces moisture contact with the paperboard body ply and results in increased container strength and lower manufacturing costs. The foamed adhesive is preferably a foamed aqueous adhesive. The foamed adhesive may be a substantially pure resin adhesive or a mixture of a resin and at least one filler. The two plies may comprise a paperboard body ply and a liner ply adhered together using a foamed adhesive placed therebetween. Additional layers, such as additional paperboard plies or label plies, may also be added to the tubular container and adhered using a foamed adhesive. An apparatus and method for constructing tubular containers is also provided.

Dependencies are inferred from the claim text.