초록 ▼

Multilayer film structures and packages therefrom which are particularly suited for containing organics such as organic liquids or solvents, e.g., amines, diamines, triamines, xylenes, tolene, ethoxyethanols, urethanes, or epoxies, or the like, or materials containing organics are disclosed as are m

Multilayer film structures and packages therefrom which are particularly suited for containing organics such as organic liquids or solvents, e.g., amines, diamines, triamines, xylenes, tolene, ethoxyethanols, urethanes, or epoxies, or the like, or materials containing organics are disclosed as are methods for containing such organics. The film structures have two layer elements. The first layer element has a flexible barrier material layer and a sealant layer; the second layer element has a high barrier material layer; and when formed into a package such as a pouch the sealant layer is disposed interiorly and is used to seal the package together. Suitable materials for the high barrier material include metal foil, e.g., aluminum foil, and nylon coated on at least one side with a polyvinylidene chloride copolymer; the flexible barrier material layer is suitably nylon; and, the sealant is preferably ethylene vinyl acetate. Additional layers such as additional primer, adhesive, tie or sealant layers can also be present as can at least one protective layer disposed over the high barrier material layer. The packages of this invention can contain the organics in varying conditions, including elevated heat and/or humidity, without blistering, bubbling, cracking or product permeation.

대표청구항 ▼

[ What is claimed is:] [1.] A flexible package adapted for packaging an organic liquid or organic solvent, said package having an interior and an exterior, said package further having at least a pair of sidewalls in a face to face relation, said sidewalls comprising a coextruded first layer element

[ What is claimed is:] [1.] A flexible package adapted for packaging an organic liquid or organic solvent, said package having an interior and an exterior, said package further having at least a pair of sidewalls in a face to face relation, said sidewalls comprising a coextruded first layer element and a second layer element, said first layer element comprising a flexible barrier material layer consisting essentially of a nylon and a separate sealant layer, said second layer element having a high barrier layer selected from the group consisting of a metal foil, a nylon and a vinylidene chloride copolymer wherein, said flexible barrier material layer is disposed between said sealant layer and said second layer element and the sealant layer of said sidewalls being in contact with said material comprising an organic liquid or organic solvent, said sealant layer being selected from the group consisting of halogen free olefin and olefin-based materials, said package being sealed by said sealant layers of said sidewalls being adhered together about the edges of said sidewalls such that said second layer element or flexible barrier layer are not in contact with said material comprising an organic liquid or organic solvent, wherein said layer elements have a thickness of at least 1.5 mils (0.038 mm).