ISSN:
0032-3888
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The interparticulate friction coefficient has been measured for a range of pellet cross-sections. This measurement is postulated as representing the integrity of the solid bed in plasticating extrusion, reciprocating-screw injection molding and extrusion blow molding. The value of the interparticulate friction coefficient has been found to be consistently greater for profiled pellet cross-sections such as bilobal and trilobal than for conventional pellets with circular cross-sections. It is postulated that this result means that solids beds formed from pellets with profiled cross-sections are less likely to fracture, or break-up, than are solids beds formed with conventional pellets, during plasticating extrusion, reciprocating-screw injection molding and extrusion blow molding. It is further postulated that this will result in surge inhibition, and allow the manufacturing units to run faster with fewer operational problems. The effects of normal load, pellet geometry, polymer molecular weight and agitation of the bed are also presented. In addition to the measurement of the interparticulate friction coefficients, the manufacturing procedures for profiled pellets are explained.
Additional Material:
14 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pen.760312303
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