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Standard Test Method for Dichloromethane-Soluble Matter in Cellulose
Automatische name übersetzung:
Standard Test Method for Dichlormethan-löslichen Stoffes in Cellulose
NORM herausgegeben am 1.6.2010
Bezeichnung normen: ASTM D3971-89(2010)
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.6.2010
SKU: NS-25556
Zahl der Seiten: 2
Gewicht ca.: 6 g (0.01 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
dissolving types of cellulose pulps, extractives, fat, removal efficiency of bleaching and pulping, resin, soxhlet, wax, Cellulose and cellulose derivatives, Dichloromethane, Extractives content, ICS Number Code 85.040 (Pulps)
Significance and Use | ||
Dichloromethane-soluble materials are typically referred to as extractives. These extractives are comprised of organic materials that originated in the wood or cotton. The measure is an indication of the efficiency of removal of these substances during pulping and bleaching. The extractive level is of concern to dissolving pulp users since the presence of large amounts of extractives could inhibit the processing of cellulose into the desired derivative. |
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1. Scope | ||
1.1 This test method covers the determination of dichloromethane-soluble matter in cellulose and is applicable to dissolving-type cellulose pulps prepared from cotton or wood. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||
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Historisch
1.6.2007
Historisch
1.6.2011
Historisch
1.10.2009
Historisch
1.6.2011
Historisch
1.6.2013
Historisch
1.6.2013
Letzte Aktualisierung: 2024-09-13 (Zahl der Positionen: 2 429 660)
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