Patent DE2909902A1 successfully refreshed from Google Patents.
DE2909902A1
Expired / Lapsed
DE
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Plastic powder grain structure determn. - by heating suspension in fluid causing swelling and measuring ultrasonic attenuation
Assignee: Huels AG
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Filing: 1979-03-14
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Granted: —
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Expires: 1999-03-14
Abstract
Abstract The grain structure of plastic powder is investigated by suspending it in a fluid which can cause it to swell, pref. at normal pressure below the temp. where swelling starts. After stirring the suspension is heated at a constant rate of rise of the temp. to produce a significant swelling. During the heating period the suspension or a part of it is exposed to the sonic vibrations of an ultrasonic generator with a frequency between 0.02 and 20 MHz. The attenuation of the sound waves is measured continuously and represents a direct measure for the grain structure of the plastic powder.
Inventors
- 👤 Klaus-Rudolf Dipl Ing Dr Meyer
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-08 08:38
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N29/00; G01N29/02; G01N29/032
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