Eastman Chemical Company

Eastman-kodak Company

Max Lamar Carroll, Jr

Lanney Calvin Treece

Eric Gray Olsen

Marcus David Shelby

Michael Paul Ekart

Stephen Weinhold

A method and apparatus for determining the stretching characteristics of a polymer composition suitable for use in manufacturing a thermoplastic article, such as a bottle and preferably a bottle having PET, PEN and mixtures thereof, are provided. The method includes the steps of heating a bottle preform of the polymer composition to at least its glass transition temperature then free-blowing the preform in a manner so that the inflation pressure is varied inversely relative to the expansion of the article during at least a portion of the inflation step. An apparatus for free-blowing the thermoplastic articles in accordance with the method is also disclosed.

Technique for free-blowing plastic preforms

An apparatus and a method for molding of polyester articles having low acetaldehyde content directly from a melt without intermediate solidification of the molten polyester. A melt to mold process is used wherein an acetaldehyde stripping agent is mixed into a polyester melt before devolatilization in a flash tank. The devolatilized polyester is pumped out of the flash tank and injected into a mold, thus forming a shaped article. The apparatus may include one or more flash tanks in one devolatilization line, or multiple devolatilization lines may be used stemming from one main polymerization reactor. The final shaped article should contain less than 10 ppm of acetaldehyde.

Apparatus and method for molding polyester articles having low

The present invention relates to an apparatus and method for producing molded polyester articles. More particularly, the invention concerns an apparatus and method for continuously producing molded polyester articles having low acetaldehyde content from a melt prepared by continuously reacting polyester precursors. The polyester is prepared and formed into useful shaped articles in a single, integrated, continuous melt-to-mold process without an intermediate solidification of the melt.

Apparatus and method for molding of polyester articles directly from a

A process for producing polyester articles, which generates little or no polyester waste. The process provides esterification or transesterification of one or more dicarboxylic acids or their dialkyl esters, polycondensation to produce a high molecular weight polyester, and molding or shaping of the polyester for produce the desired product. Scrap produced during the molding process is recycled back to the esterification or transesterification or polycondensation portion of the process. Optionally, the scrap may also be recycled to intermediate steps prior to the molding operation.

Process for continuously producing polyester articles with scrap recycle

Disclosed are a method and apparatus for determining the stretching characteristics of thermoplastic articles such as bottles on a consistently accurate basis by making an initial measurement such as dimension or volume, stretching the article to the onset of strain hardening, and correlating the measurements to a physical property such as inherent viscosity, intrinsic viscosity or molecular weight of the thermoplastic article.

System for determining stretch characteristics of thermoplastic articles

Method of determining stretch characteristics of thermoplastic articles

Poly(tetramethylene terephthalate) having an inherent viscosity of from about 0.6 to about 1.4 is modified by the addition of from about 5 to about 35 percent by weight of polyethylene having a density of about 0.918 gm./cc. and a melt index from about 0.1 to about 10.0 to provide an extrusion film or coating composition especially for the coating of substrates at very high line speeds, while resulting in consistent coating characteristics.

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Kingsport, TN, United States of America

Max Lamar Carroll, Jr