Jim Throne on June 25th, 1997

Introduction The class of thermoplastic polyesters has two major subclasses – polybutylene terephthalate or PBT, and polyethylene terephthalate or PET – and two minor subclasses – PET copolymer such as Eastman’s PETG, and polyethylene naphthanate or PEN. With the exception of the copolymers, all polyesters can be crystallized, albeit very slowly when compared with polyethylenes. […]

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Jim Throne on June 14th, 1997

Since Dr. Nam Suh and his colleagues patented a technique for producing microcellular foam in 1987, there has been an international flurry of activity in this area. This technical note reviews some of the boundaries of the current and expected technologies. Microcellular Foam – A Definition In a recent publication [J.L. Throne, Thermoplastic Foams,Sherwood Publishers, […]

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