Verfahren zur Herstellung von Mehrschichtbogenpackungen

摘要

Sheet materials and packages made therefrom, and capable of holding hard-to-hold products such as methyl salicylate and other volatile components, in one form include a foil layer (12) and a layer (14) of EVOH between foil layer (12) and the enclosed product. A carboxy-modified adhesive layer (18) is disposed between the EVOH layer (14) and the product. Additional layers (28, 30, 32, 34, 36, 38, 40) are used in the sheet material for purposes of adhesion, appearance, protection, body, and the like. A coextruded film structure comprises an EVOH layer (514), a surface layer (516), an intervening adhesive layer (518), and a fourth covering layer (519) for covering and protecting the EVOH layer (514), especially from physical abuse. Packages made from the sheet materials and coextruded film can be in the form of sachets, pouches and bags, or in the form of dispensing tubes.