Toray Plastics (america), Inc.

Jan K Moritz

John Fitch

Stefanos L Sakellarides

Robert T Ervolino

Steven J Sargeant

Yasuo Nishigaki

Pat Andrews

Yuji Shimizu

Keunsuk P Chang

Tracy Paolilli

Mark Vincent Loen

James E Velliky

Bonnie Adams

Kari Shoolbraid

Takafumi Sakai

Christopher Nothnagle

Michael G Fatica

Gerardo Eugenio Rada Murga

G Vincent Sharps, Jr

Paige Manuel

Gianfranco Chicarella, Jr

A formable biaxially-oriented film includes a first layer. The first layer includes from about 10 to about 90 wt. % crystalline polyester and from about 10 to about 90 wt. % of a formability enhancer to assist in increasing the polymeric chain flexibility. The formability enhancer has a melting point less than about 230&#xb0; C. The film has a MD and a TD Young's Modulus of at least 10% lower than a crystalline polyester film in the absence of the formability enhancer. The film may further include a second layer, which includes an amorphous copolyester. The second layer may be adjacent to or attached to the first layer.

Method of forming a formable polyester film

Embodiments herein relate to a polymer film comprising an anti-blushing composition in a blend comprising polyethylene terephthalate (PET) and polybutylene terephthalate (PBT); wherein the blend contains at least 50 wt. % of PBT; wherein the anti-blushing composition comprises a phosphorus containing compound but excludes certain phosphorus compounds; and wherein the anti-blushing composition is configured to prevent blushing in the polymer film laminated directly to a metal substrate sheet and exposed to steam at a temperature of 260&#xb0; F. for 90 minutes.

Anti-blush and chemical resistant polyester film

Embodiments herein relate to a polymer film comprising an anti-blushing composition in a blend comprising polyethylene terephthalate (PET) and polybutylene terephthalate (PBT); wherein the blend has an intrinsic viscosity above 0.75 and contains at least 50 wt. % of PBT; wherein the anti-blushing composition comprises a phosphorus containing compound but excludes certain phosphorus compounds; and wherein the anti-blushing composition is configured to prevent blushing in the polymer film laminated directly to a metal sheet and exposed to steam at a temperature of 260&#xb0; F. for 90 minutes.

Embodiments herein relates to a Bisphenol A-free multi-layer biaxially oriented polyester (BOPET) film, for lamination on metal sheets, which could be used for food containers. The BOPET film has at least one outer release layer, which aids in the release of food, such as a high protein food source, when food is cooked and sterilized in direct contact with the outer release layer. The BOPET film can be laminated to metals used in the manufacture of food containers with the outer release layer being exposed to allow a direct food contact between the surface of the outer release layer and food. More particularly, the invention relates to a novel outer release layer resin composition comprising an ultra high molecular weight siloxane polymer and a polyethylene trephthalate resin; and an alkali-metal phosphate and a phosphoric acid compound added, during polymerization of the outer release layer resin composition, as a catalyst/additive package to the ingredients forming the outer release layer resin composition. A wax component can be added in the outer release layer, for more robust release performance.

Polyester film incorporating silicone for release of canned meat products

Biaxially oriented film and metal laminate composite thereof useful for manufacturing food containers with good resistance to blushing during steam sterilization, comprising a blend of PBT and PET and also incorporating color pigment comprising polar functional groups. The films possess improve resistance to trans-esterification during melt processing, resulting in enhanced crystallinity levels present in the laminated film which leads to little or no blush discoloration during steam sterilization.

Blush-resistant film including pigments

An embodiment relates to a multi-layer, biaxially oriented polyester (BOPET) film comprising a food contact substance, wherein the BOPET has a percent release in a retort test after can lamination such that substantially all food contacting the BOPET during the retort test is released. Another embodiment relates to a method comprising applying a food contact material comprising a food contact substance to a multi-layer, biaxially oriented polyester (BOPET) film, wherein the food contact material is prepared at around room temperature without heating.

Starch coated polyester film for release of canned meat products

Coextruded biaxially oriented sealable polyester films having at least one heat-sealable layer and at least one base layer. The heat-sealable layer has a sealing temperature on APET or PETG trays of at least 250&#xb0; F. (121&#xb0; C.) for seal strength of at least 1,500 g/in of film width, and a static and dynamic coefficient of friction of 0.28 or less. The heat-sealable layer includes one or more amorphous polyesters and one low melting point crystallizable polyester, such as polybutylene terephthalate (PBT).

Heat sealing polyester films with low coefficient of friction

A carrier film of thermoplastic polyester has releasable metal adhesive properties suitable for a metal transfer in which the polyester film is metalized and the metal layer is subsequently transferred to a permanent adhesive-coated substrate. The metal layer is in direct contact with the polyester carrier film and no intermediate release layer is present. Desired metal adhesion is provided by dispersing an suitable surfactant, and optionally, a hydrocarbon wax, uniformly into the polyester film. Surfactant on the outer surface of the carrier film modifies metal adhesion to the polyester such that the metal can be removed in a metal transfer operation.

Releasable polyester high gloss metal transfer film method

A metal transfer film of thermoplastic polymer includes a polymeric carrier film, a layer of metal to be transferred onto an article, and a layer of retention adhesive suitable for bonding the transferred metal layer to a surface of the article. The transferable metal layer is adjacent between the carrier film and the retention adhesive layer. Optionally, the carrier film has a releasably adhesive layer on the side in contact with the metal. The retention adhesive is a polyvinyl amine crosslinked with citric acid. The retention adhesive is deposited on the metal layer from a liquid solution and dried to a non-tacky, solid coating enabling handling of the metal transfer film in conventional film processing unit operations. The dry retention adhesive can be activated by the metal transfer operator remotely from the adhesive application process and provides significant oxygen, moisture and aroma barrier properties to the metal covered article.

Metal transfer film and method of using same

Releasable polyester high gloss metal transfer film

A composite includes a multilayer polyethylene terephthalate (PET) film having a base layer and an adjacent skin layer. The PET of the skin layer has inherent viscosity of about 0.70-0.90 and carboxyl endgroup concentration of less than 25 eq/T. The base layer can be affixed to a thin metal sheet. Optionally, the base layer of a second multilayer PET film with a skin layer inherent viscosity of about 0.70-0.90 and carboxyl endgroup concentration of less than 25 eq/T can be affixed to the opposite side of the metal sheet. The composite is suited for making food and chemical containers such as food storage cans that resist blush discoloration from steam contact during container formation and age degradation during extended storage of harsh chemical products.

Method of packaging product in container with blush and chemical resistant polyester film

Blush and chemical resistant polyester film

A carrier film of thermoplastic polyester has releasable metal adhesive properties suitable for a metal transfer in which the polyester film is metalized and the metal layer is subsequently transferred to a permanent adhesive-coated substrate. The metal layer is in direct contact with the polyester carrier film and no intermediate release layer is present. Desired metal adhesion is provided by dispersing a suitable surfactant, and optionally, a hydrocarbon wax, uniformly into the polyester film. Surfactant on the outer surface of the carrier film modifies metal adhesion to the polyester such that the metal can be removed in a metal transfer operation.

Releasable polyester metal transfer film

The invention is a laminating process which is directed toward economical production methods for scalable amounts of production which develop properties suitable for a broad based product line. In particular, the product is capable of important key components of commercial properties such as adhesion, scratch resistance, chemical inertness, and bending without failure.

Applying biaxially oriented polyester onto a metal substrate

The novel method can produce a grooved profile metalized polymeric film capable of generating a rainbow iridescent effect without mechanically embossing the film. The method calls for applying a thin uniform thickness coating layer of thermally deformable polymer composition on a thermally stable base layer. Process operating conditions are controlled to heat the composite coating layer surface effectively such that light diffraction-scale grooves of about 5,000-10,000 grooves/cm develop in the coating layer. The grooves are created by shocking the coating layer surface with a sudden burst of heat supplied by film metalization after coating layer application.

Growing community of inventors

North Kingstown, RI, United States of America

Jan K Moritz