American Can Company

American National Can Company

Suzanne E Schaefer

John P Eckstein

Lee J Murray, Jr

William S Gillespie

Jack E Knott, Ii

Sheet materials and packages capable of holding hard-to-hold products such as methyl salicylate. The preferred embodiments include a foil layer 12 and a layer 14 of EVOH between foil layer 12 and the enclosed product. An anhydride modified adhesive layer 18 is disposed between the EVOH layer 14 and the product 52. Additional layers are used in the sheet material for purposes of adhesion, appearance, protection, body, and the like. One embodiment of the invention is a coextruded film comprising the EVOH layer 514, a surface layer 516 of LLDPE, an intervening adhesive layer 518, and a fourth covering layer 519 for covering and protecting the EVOH layer 514, especially from physical abuse. The sheet materials of the invention may be made into packages by means of fin seals 54 or lap seals 50.

Laminates and laminated tubes and packages

Sheet materials and packages capable of holding hard-to-hold products such as methyl salicylate. The preferred embodiments include a foil layer 12 and a layer 14 of EVOH between foil layer 12 and the enclosed product. A carboxy modifed adhesive layer 18 is disposed between the EVOH layer 14 and the product 52. Additional layers are used in the sheet material for purposes of adhesion, appearance, protection, body, and the like. One embodiment of the invention is a coextruded film comprising the 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. The sheet materials of the invention may be made into packages using fin seals 54 and lap seals 50.

Laminates and laminated tubes and packages for hard-to-hold products

Sheet materials and packages capable of holding hard-to-hold products such as methyl salicylate. The preferred embodiments 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 52. Additional layers are used in the sheet material for purposes of adhesion, appearance, protection, body, and the like. One embodiment of the invention is a coextruded film comprising the 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. A method is disclosed wherein the sheet materials of the invention may be made into packages using fin seals 54 and lap seals 50.

Methods of making improved packages

The invention is in an improved multiple layer packaging sheet material which can be formed into closed and sealed packages suitable for holding products containing substantial fractions of cyanoacrylate. The invention depends on the positioning of high density polyethylene in direct contact with the cyanoacrylate-type product, and positioning a primer on the other side of the high density polyethylene. Preferred embodiments of the sheet structure include additional layers to provide barrier and abuse resistance properties, and the necessary adhesive materials to hold the various layers of the structure together with good adhesion. Additional layers are contemplated. The sheet structure can be formed into a package which positions the high density polyethylene adjacent the cyanoacrylate product, and between it and the other layers at all locations of contact between the cyanoacrylate product and the packaging sheet material.

Multiple layer sheet material

A collapsible dispensing tube has a multi-layer sheet material sealed over its dispensing orifice to provide a hermetically sealed tube. The multi-layer sealant sheet comprises two layers of metal foil separated by a polymer layer firmly adhered to the metal foil layers. A polymeric layer is adhered to the outer surface of one of the metal foil layers and serves to seal the tube orifice. The laminated sheet may be sealed across the orifice by the application of radio-frequency energy.

Collapsible dispensing tube with an orifice sealed with multi-layer

The invention is an improved multiple layer packaging sheet material which can be formed into closed and sealed packages suitable for holding products containing substantial fractions of cyanoacrylate. The invention depends on the positioning of high density polyethylene in direct contact with the cyanoacrylate-type product, and positioning a primer on the other side of the high density polyethylene. Preferred embodiments of the sheet structure include additional layers to provide barrier and abuse resistance properties, and the necessary adhesive materials to hold the various layers of the structure together with good adhesion. Additional layers are contemplated. The sheet structure can be formed into a package which positions the high density polyethylene adjacent the cyanoacrylate product, and between it and the other layers at all locations of contact between the cyanoacrylate product and the packaging sheet material.

The invention is in an improved packaging tube and the packages, containing product, made therefrom. The packaging is suitable for holding products containing substantial fractions of cyanoacrylate-type components. The invention depends on the use of special multiple layer sheet material for the tube sidewall and a covering strip over the inside surface of the tube longtitudinal sideseam. A layer of high density polyethylene is positioned on the inside surface of the tube, such that it is the surface in direct contact with the product. A primer layer having a Lewis base-type component, such as polyethylene imine, is between the surface of the high density polyethylene layer which is disposed away from the product and subsequent layers which may be susceptible to interaction with the product. Preferred embodiments of the package use sheet materials having additional layers to provide barrier, heat sealability, and abuse resistance properties, and the necessary adhesive materials to hold the various layers of the structure together with good adhesion. Additional layers are contemplated. The covering strip is high density polyethylene, and it covers and protects the edge of the sheet material on the inside of the package at the tube longitudinal sideseam.

Dispensing tube package

This invention is a multiple layer packaging film in which the outer polymeric layers cooperate to achieve, between themselves, a relatively constant coefficient of friction differential, a fin seal capability, and a lap seal capability; even after the film is stored in wound-up roll form.

Growing community of inventors

Neenah, WI, United States of America

Suzanne E Schaefer