Cryovac, Inc.

W. R. Grace Co.-conn.

W. R. Grace & Co., Cryovac Div.

George Dean Wofford

John R Wolf

Marvin Russell Havens

Blaine C Childress

Ronald D Moffitt

Solomon Bekele

Gautam P Shah

Robert Babrowicz

Kelly Ray Ahlgren

Bradford E Webster

Anton L Timmons

John G Bradfute

Rafizi Ramli

Christopher Brown

Larry Bikle McAllister

William Peyton Roberts

Ram Kumar Ramesh

Vincent W Herran

Cedric M Lulham

Kimberly Ann Mudar

Gloria G Toney

Steven G Friedrich

Martindale Nelson

Lawrence R Norpoth

Stephen Floyd Compton

Gregory E McDonald

Charles Rice Barmore

Andrew W VanPutte

Kenneth Chrisman

Jeffrey Linyard Walker

Alan S Weinberg

Julian L Pruitt

Jay B Wilson

C Michael Lulham

David Wayne Grams

Robert D All

Howard D Connor

Shawn D Harris

F Ted Oakhill

William Z Snow

Jack L Shriver, Jr

Steve B Garland

Kyle B Bullock

Jack L Shriver

Larry B Mcallllister

A multilayer, heat-shrinkable film generally includes at least one bulk layer and a microlayer section comprising at least 10 microlayers, each of which has a thickness ranging from about 0.001 to 0.015 mil. The ratio of the thickness of any of the microlayers to the thickness of the bulk layer is at least about 1:2. The film has a total free shrink (ASTM D2732-03) of at least about 10% at 200&#xb0; F.

Multilayer, heat-shrinkable film comprising a plurality of microlayers

A multilayer, heat-shrinkable film generally includes at least one bulk layer and a microlayer section comprising a plurality of microlayers. The ratio of the thickness of any of the microlayers to the thickness of the bulk layer ranges from about 1:2 to about 1:40.

The present invention is directed to a heat-shrinkable, thermoplastic film or bag which contains at least one homogeneous ethylene alpha-olefin copolymer having a density of at least 0.90 g/cc. Oriented films made in accordance with the present invention exhibit improved optics and improved impact resistance. A homogeneous ethylene alpha-olefin may be present in a monolayer film either alone or in a blend or may be included in one or more layers of a multilayer film in accordance with the present invention.

Heat shrinkable films containing single site catalyzed copolymers

The present invention is directed to a heat-shrinkable, thermoplastic film or bag which contains at least one homogeneous ethylene alpha-olefin copolymer with at least some limited long chain branching. Oriented films made in accordance with the present invention exhibit improved processability as well as improved physical properties such as excellent optics and impact resistance. A homogeneous ethylene alpha-olefin with long chain branching may be present in a monolayer film either alone or in a blend or may be included in one or more layers of a multilayer film in accordance with the present invention.

Heat shrinkable films containing single site catalyzed copolymers having long chain branching

A packaged product has a food product having an added liquid thereon, and a packaging article at least partially surrounding the food product. The packaging article having a seal layer comprising a member selected from the group consisting of a slip agent and a surfactant. The slip agent or surfactant causes contamination from the added liquid to bead up or wet out, respectively, thereby permitting heat sealing through the contamination with a lower leaker rate than would otherwise be the case.

Packaging product, process for making same, and product made therefrom

Meat package with reduced leaker rates

A heat-shrinkable multilayer film comprises (A) a first layer, which is an outer layer, and which comprises polyolefin; (B) a second layer comprising at least one member selected from the group consisting of polyolefin, polystyrene, and polyurethane, wherein the second layer has a thickness of from about 10 to 50 percent, based on a total film thickness; (C) a third layer comprising a polyamide having a melting point of 160&#xb0; C. and below; and (D) a fourth layer, which is an outer layer, the fourth layer comprising polyester. The first layer preferably serves as a seal layer in a heat-shrinkable bag. The third layer provides enhanced orientability of the tape from which the film is formed, thereby providing improved total free shrink and lower shrink temperature. The third layer also provides greater optical clarity and permits the presence of a thicker polyamide layer, thereby increasing impact strength and improving the O-barrier of the film. The high melting polyester of the fourth layer permits at least two bags, having product therein, to be stacked on top of one another and sealed simultaneously, without sticking to one another, thereby doubling the output of a vacuum chamber machine. A bag and a process of making a packaged product are also disclosed.

Stack sealing method using multilayer packaging film

A heat-shrinkable multilayer film comprises (A) a first layer, which is an outer layer, and which comprises polyolefin; (B) a second layer comprising at least one member selected from the group consisting of polyolefin, polystyrene, and polyurethane; (C) a third layer comprising at least one member selected from the group consisting of amorphous polyester and polyester having a melting point of from about 130&#xb0; C. to about 260&#xb0; C.; (D) a fourth layer, which is an outer layer, the fourth layer comprising at least one member selected from the group consisting of polyester, polyamide and polyurethane. The first layer preferably serves as a seal layer in a heat-shrinkable bag. The third layer provides enhanced impact strength, optics, grease-resistance, and free-shrink of the film, and renders the tape more easily orientable. The high melting polyester, polyamide, and/or polyurethane of the fourth layer permits at least two bags, having product therein, to be stacked on top of one another and sealed simultaneously, without sticking to one another, thereby doubling the output of a vacuum chamber machine. A bag and a process of making a packaged product are also disclosed.

Heat-shrinkable multilayer packaging film comprising inner layer comprising a polyester

Film and sheet materials, and articles made therefrom, such as bags, pouches, trays, etc., comprise one or more layers of homogeneous alpha-olefin/vinyl aromatic copolymer, preferably an ethylene/styrene copolymer. The alpha-olefin/vinyl aromatic copolymer has properties which can provide a desired performance characteristics such as impact resistance, printability, RF sealability, free shrink, optics, high permeability, etc. The homogeneous alpha-olefin/vinyl aromatic copolymer may be present in a monolayer film, either alone or in a blend, or may be included in one or more layers of a multilayer film. Also included is a multilayer thermoformable article comprising a web having a film of such alpha-olefin/vinyl aromatic copolymers thereto.

Film containing alpha-olefin/vinyl aromatic copolymer

A heat-shrinkable multilayer film comprises (A) a first layer, which is an outer layer, and which comprises polyolefin; (B) a second layer comprising at least one member selected from the group consisting of polyolefin, polystyrene, and polyurethane; (C) a third layer comprising at least one member selected from the group consisting of amorphous polyester and polyester having a melting point of from about 130&deg; C. to about 260&deg; C.; (D) a fourth layer, which is an outer layer, the fourth layer comprising at least one member selected from the group consisting of polyester, polyamide and polyurethane. The first layer preferably serves as a seal layer in a heat-shrinkable bag. The third layer provides enhanced impact strength, optics, grease-resistance, and free-shrink of the film, and renders the tape more easily orientable. The high melting polyester, polyamide, and/or polyurethane of the fourth layer permits at least two bags, having product therein, to be stacked on top of one another and sealed simultaneously, without sticking to one another, thereby doubling the output of a vacuum chamber machine. A bag and a process of making a packaged product are also disclosed.

A packaging cushion is disclosed for supporting and protecting objects during shipment. The cushion has upper and lower surfaces and one or more compartments for supporting the objects in positions so that the objects are higher than the lower surfaces of the cushions. The cushions may include upper and lower nodes which increase the separation distance between the objects when the cushions are stacked one on top of another. The cushions may be held in a stack by an outer box, or by wrapping the stack of cushions in a protective film, eliminating the need for an outer box.

Packaging cushion and packaging assemblies incorporating same

A heat-shrinkable film containing a homogeneous ethylene/alpha-olefin copolymer has a high impact strength and a high free shrink. The film can be a monolayer film or multilayer film, with the homogeneous ethylene/alpha-olefin copolymer present alone or in a blend, and in one or more film layers. The film is especially suited for use in heat-shrinkable bags, which can be used for the packaging of various products, especially meat.

High impact strength film containing single site catalyzed copolymer

Growing community of inventors

Duncan, SC, United States of America

George Dean Wofford