System for determining stretch characteristics of thermoplastic

Details System for determining stretch characteristics of thermoplastic System for determining stretch characteristics of thermoplastic

1994-05-31

1995-08-08

Chilcot, Jr., Richard E.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

73 37, G01N 318

Patent

active

054388783

ABSTRACT:
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.

REFERENCES:
patent: 4090394 (1978-05-01), Herman et al.

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