G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 3/08 (2006.01) B29C 49/80 (2006.01) G01N 3/10 (2006.01) G01N 3/12 (2006.01) G01N 33/44 (2006.01) B29C 49/00 (2006.01) B29C 49/06 (2006.01) G01N 3/00 (2006.01) G01N 3/02 (2006.01) G01N 33/00 (2006.01)
Patent
CA 2147125
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.
On divulgue une méthode et un appareil pour déterminer de manière toujours exacte les caractéristiques d'étirement d'objets thermoplastiques, comme des bouteilles, en prenant une mesure initiale comme la dimension ou le volume, en étirant l'objet jusqu'à l'apparition du phénomène d'écrouissage, et en établissant une corrélation entre les mesures et une propriété physique comme l'indice logarithmique de viscosité, l'indice limite de viscosité ou le poids moléculaire de l'objet thermoplastique.
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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