E.i. Dupont De Nemours and Company

Alcoa Inc.

Cryovac, Inc.

Stephen Robert Tanny

I-Hwa Lee

David D Zhang

Sassan Hojabr

Terrance D Kendig

Jeffrey Allen Chambers

Stewart Carl Feinberg

Janet W Rivett

Jeffrey Alan Hanks

Diane McCauley Hahm

Philip S Blatz

Karl-Heinz Johannes Reilmann

Anthony Matthew Angelo

Samuel W Chastain

Karen U Blaskovitz

Alister M Soutar

Vladimir Antonov

Disclosed are compositions of ethylene/(meth)acrylate copolymers, polyolefins (e.g., polyethylene and polypropylene), optional tackifier resins and optional fillers that provide very strong, tight hermetic heat seals yet are easily peelable. These compositions are useful as an adhesive layer in multilayer structures that are useful as packaging lidding films. Also disclosed are packages that comprise these multilayer structures.

Composition comprising ethylene copolymers and polyolefin

Disclosed are compositions comprising ethylene/vinyl acetate copolymers, tackifying resins and optionally polyolefins (for example, polyethylene and polypropylene) that provide strong, tight hermetic heat seals with an easily peelable opening feature to fluoropolymers such as polychlorotrifluoroethylene. Also disclosed are multilayer structures and packages comprising these compositions.

Compositions of ethylene/vinyl acetate copolymers for heat-sealable easy opening packaging

A composite building panel that includes a fabric reinforcing sheet between one of the metal skins and the core of the panel. The fabric reinforcing sheet, which is preferably made from aramid fibers improves the impact resistance and penetration resistance of the building panel without substantially increasing weight and without adding fuel content to the panel system.

Impact resistant building panels

The present invention provides a resin composition made from admixing starting materials comprising: (a) 0 to 90 parts by weight of a polyolefin; (b) 5 to 95 parts by weight of a functional polyolefin; (c) 5 to 40 parts by weight of a polystyrenic; and (d) 0 to 30 parts by weight of an elastomer, where the total amount of components of (a), (b), (c) and (d) in the resin composition is 100 parts by weight. In a further embodiment, component (a) is a non-olefin copolymer and component (c) is high impact polystyrene. The resin compositions are useful as adhesives for metal and polyolefin substrates.

Low activation temperature adhesive composition with high peel strength and cohesive failure

A peelably sealed package includes a web having a peelable layer and a substrate having a surface layer. The peelable layer includes a blend of: i) from about 3 to about 15 weight parts polybutylene, ii) from about 40 to about 75 weight parts ionomer, and iii) from about 20 to about 55 weight parts ethylene/unsaturated ester copolymer such as a vinyl ester of aliphatic carboxylic acid or an alkyl ester of acrylic or methacrylic acid. The surface layer of the substrate includes a polyethylene having a density of from about 0.915 to about 0.93 g/cc, an ionomer, or a mixture of these polymers. The peelable layer of the web and the surface layer of the substrate are peelably sealed to each other in one or more selected areas. The peelable layer may form a peelable seal having a peel strength that is essentially equivalent regardless of whether the contact surface of the substrate is a polyethylene or an ionomer.

Peelably sealed packaging

Polyethylene-based adhesive compositions which contain as little as 5 weight percent, and up to 35 weight percent of an acid-grafted metallocene polyethylene have superior peel strength to comparable compositions containing an acid grafted non-metallocene and EVA or EMA polyethylene. Compositions where the acid-grafted metallocene polyethylene component is based on a metallocene polyethylene having a melt-flow ratio of less than 6.53 and an Mw/Mn of greater than the melt flow ratio less 4.63 are as good adhesive compositions as those based on metallocene resins falling outside these parameters.

Adhesive compositions based on blends of grafted metallocene catalyzed and polar ethylene copolymers

Adhesive compositions based on blends of grafted metallocene catalyzed

The present invention relates to bonding resins having excellent adhesion to polar polymers, particularly ionomers, acid copolymers and ethylene vinyl alcohol copolymer. These resins preferably contain: 1) an ethylene polymer or copolymer (ungrafted, grafted or partially grafted); 2) a grafted elastomer; and 3) optionally, an ethylene alpha olefin copolymer which is wholly or partially grafted. Preferred grafting comonomers include maleic anhydride and derivatives thereof.

Adhesion compositions for multilayer structures

The present invention is directed to extrudable sealants which are particularly well suited for bonding a metal based, lidding material to a polystyrene container. The most preferred sealant compositions of the present invention preferably contain an acid copolymer, a tackifier and a polyolefin.

Extrudable adhesive compositions and methods relating thereto

Lidding of a sealant layer adhered to a substrate is provided wherein the sealant layer is a blend of ethylene/unsaturated ester copolymer with ethylene/unsaturated acid/unsaturated ester terpolymer, and wherein the sealant layer provides a peel strength of 500 to 2200 g/cm.sup.2 to a wide variety of container materials, with the peel strength being substantially insensitive to operating variations in seal temperature, and the sealant layer has a higher cohesive strength than the peel strength of its seal to the container material.

Lidding for containers

Polymeric blends particularly useful as adhesives for nylon prepared from an ethylene polymer and a second polymer grafted with maleic anhydride.

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Newark, DE, United States of America

Stephen Robert Tanny