Apparatus to obtain flow rates (melt index) in plastics via fixe

Details Apparatus to obtain flow rates (melt index) in plastics via fixe Apparatus to obtain flow rates (melt index) in plastics via fixe

1992-10-15

1994-11-22

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3320

Patent

active

053672607

ABSTRACT:
A pulsed NMR analysis system and process comprising an air curtain (137), sample throughput system (P, LI, V1, V2) and user system controls (104) to establish digitized free induction decay curves (C) , from which components functions are determined using linear or nonlinear regression techniques to correlate the curve components to the target nuclei and to flow rates in plastic including MI and FRR for polyethylene and MF for polypropylene.

REFERENCES:
patent: 4489275 (1984-12-01), Sancier et al.
patent: 5015954 (1991-05-01), Dechene et al.
patent: 5049819 (1991-09-01), Dechene et al.
patent: 5111145 (1992-05-01), Sepponen
American Society for Testing and Materials document Designation: D 1238-90b, pp. 393-399, Table 5, p. 406, Table 2.

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