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Bulk density versus hydrostatic pressure characteristics of plastics in powder and pellet form
Author(s) -
Smith N. M.,
Parnaby J.
Publication year - 1980
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760201210
Subject(s) - materials science , pellet , extrusion , hydrostatic pressure , isothermal process , hydrostatic weighing , hydrostatic equilibrium , composite material , mechanics , mechanical engineering , thermodynamics , engineering , physics , medicine , quantum mechanics , body weight
Isothermal bulk density data measured for a number of commercially important plastics are presented for practical ranges of uniform hydrostatic pressure. Regression fitted polynomials are given for each plastic to facilitate the use of the data in computer‐aided lumped‐parameter, extrusion screw feed‐zone design methods. The cylindrical pressure‐test cell used for determining the data is described together with the theory governing its reliable operation.