Significance and Use
Visual dispersion ratings correlate with certain important physical properties of the compound. A rating of 5 indicates a state of dispersion developing near maximum properties, while a rating of 1 would indicate a state of dispersion developing considerably depressed properties. Normally, the visual dispersion ratings indicate the following levels of compound quality:
|Visual Dispersion Rating||Classification|
|4 to 5||High|
|3 to 4||Intermediate|
|2 to 3||Low|
|1 to 2||Very low|
1.1 These test methods cover the degree of dispersion of carbon black in rubber. Three test methods are described as follows:
| Test Method A—Visual Inspection|| 3-11|
| Test Method B—Agglomerate Count||12-23|
| Test Method C—Microroughness Measurement|
| with Profilometer||24-34|
| Test Method D—Microroughness Measurement with IFM||35-43|
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D3182 Practice for Rubber--Materials, Equipment, and Procedures for Mixing Standard Compounds and Preparing Standard Vulcanized Sheets
D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries
agglomerate count for carbon black dispersion; carbon black; carbon black dispersion in water; dispersion; interference microscope ; micro-roughness measurement; profilometer; visual inspection for carbon black dispersion; Agglomerate count method; Carbon black; Dispersion; Microscopic examination; Rubber compounding materials; Visual examination--rubber;
ICS Number Code 83.040.20 (Rubber compounding ingredients)
ASTM International is a member of CrossRef.
Citing ASTM Standards
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