ASTM D7724-11(2016)
(Test Method)Standard Test Method for Carbon Black—Non-Dispersible Matter by Mechanical Flushing (NDM)
Standard Test Method for Carbon Black—Non-Dispersible Matter by Mechanical Flushing (NDM)
SIGNIFICANCE AND USE
4.1 The quantity of non-dispersible matter of carbon black is important in some molded or extruded products as it may relate to the surface appearance of those products. The maximum amount of non dispersible matter and the minimum size of the particles to be analyzed in each application is normally determined and agreed to between the user and the producer.
SCOPE
1.1 This test method covers the determination of non-dispersible matter after mechanical water flushing of regular untreated carbon blacks. It may not be applicable to oil-treated carbon blacks because the oil would prevent proper wetting of the black by water.
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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Designation: D7724 − 11 (Reapproved 2016)
Standard Test Method for
Carbon Black—Non-Dispersible Matter by Mechanical
Flushing (NDM)
This standard is issued under the fixed designation D7724; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope non-dispersible matter is dried, weighed, and the amount of
residue is expressed as mg/kg (ppm) of the original sample.
1.1 This test method covers the determination of non-
dispersible matter after mechanical water flushing of regular
4. Significance and Use
untreated carbon blacks. It may not be applicable to oil-treated
4.1 The quantity of non-dispersible matter of carbon black
carbon blacks because the oil would prevent proper wetting of
is important in some molded or extruded products as it may
the black by water.
relate to the surface appearance of those products. The maxi-
1.2 The values stated in SI units are to be regarded as
mum amount of non dispersible matter and the minimum size
standard. No other units of measurement are included in this
of the particles to be analyzed in each application is normally
standard.
determined and agreed to between the user and the producer.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 5. Apparatus
responsibility of the user of this standard to establish appro- 3
5.1 Sieve Apparatus, as shown in Fig. 1.
priate safety and health practices and determine the applica-
5.2 Balance, with a sensitivity of 0.01 g.
bility of regulatory limitations prior to use.
5.3 Analytical Balance, with a sensitivity of 0.1 mg.
2. Referenced Documents
5.4 Oven, gravity-convection type, capable of temperature
2.1 ASTM Standards:
regulation within 61°C at 125°C and temperature uniformity
D1799 Practice for Carbon Black—Sampling Packaged
within 65°C.
Shipments
5.5 Sieves, diameter 100 mm, of either phosphor bronze or
D1900 Practice for Carbon Black—Sampling Bulk Ship-
stainless steel. The sieve shall be in accordance with Specifi-
ments
cation E11. The sieve size to be used shall be agreed upon
D4483 Practice for Evaluating Precision for Test Method
between the purchaser and the carbon black manufacture.
Standards in the Rubber and Carbon Black Manufacturing
5.6 Weighing Dishes.
Industries
E11 Specification for Woven Wire Test Sieve Cloth and Test
6. Precautions
Sieves
6.1 Install the apparatus as described in the manufacturer’s
3. Summary of Test Method
instructions and keep it clean at all times to prevent contami-
nation.
3.1 A sample of carbon black is mechanically flushed with
water through a wire-mesh screen of a specified size until all
6.2 Examinethesieveseachtimetheyareusedtomakesure
that remains is a non-dispersible matter of carbon black. The that no cracks or holes have developed.
7. Sampling
This test method is under the jurisdiction ofASTM Committee D24 on Carbon
7.1 Samples shall be taken in accordance with Practice
Black and is the direct responsibility of Subcommittee D24.31 on Non-Carbon
D1799 or Practice D1900.
Black Components of Carbon Black.
CurrenteditionapprovedJune1,2016.PublishedJuly2016.Originallyapproved
in 2011. Last previous edition approved in 2011 as D7724 – 11. DOI: 10.1520/
D7724-11R16. The sole source of supply of the apparatus known to the committee at this time
For referenced ASTM standards, visit the ASTM website, www.astm.org, or is Krahnen IQS, GmbH, Paffrather Str. 13–15, D-51069 Koeln, Germany. If you are
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM aware of alternative suppliers, please provide this information to ASTM Interna-
Standards volume information, refer to the standard’s Document Summary page on tional Headquarters.Your comments will receive careful consideration at a meeting
the ASTM website. of the responsible technical co
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7724 − 11 D7724 − 11 (Reapproved 2016)
Standard Test Method for
Carbon Black—Non-Dispersible Matter by Mechanical
Flushing (NDM)
This standard is issued under the fixed designation D7724; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the determination of non-dispersible matter after mechanical water flushing of regular untreated
carbon blacks. It may not be applicable to oil-treated carbon blacks because the oil would prevent proper wetting of the black by
water.
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
2.1 ASTM Standards:
D1799 Practice for Carbon Black—Sampling Packaged Shipments
D1900 Practice for Carbon Black—Sampling Bulk Shipments
D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Summary of Test Method
3.1 A sample of carbon black is mechanically flushed with water through a wire-mesh screen of a specified size until all that
remains is a non-dispersible matter of carbon black. The non-dispersible matter is dried, weighed, and the amount of residue is
expressed as mg/kg (ppm) of the original sample.
4. Significance and Use
4.1 The quantity of non-dispersible matter of carbon black is important in some molded or extruded products as it may relate
to the surface appearance of those products. The maximum amount of non dispersible matter and the minimum size of the particles
to be analyzed in each application is normally determined and agreed to between the user and the producer.
5. Apparatus
5.1 Sieve Apparatus, as shown in Fig. 1.
5.2 Balance, with a sensitivity of 0.01 g.
5.3 Analytical Balance, with a sensitivity of 0.1 mg.
5.4 Oven, gravity-convection type, capable of temperature regulation within 61°C at 125°C and temperature uniformity within
65°C.
This test method is under the jurisdiction of ASTM Committee D24 on Carbon Black and is the direct responsibility of Subcommittee D24.31 on Non-Carbon Black
Components of Carbon Black.
Current edition approved Nov. 1, 2011June 1, 2016. Published November 2011July 2016. Originally approved in 2011. Last previous edition approved in 2011 as
D7724 – 11. DOI: 10.1520/D7724-11.10.1520/D7724-11R16.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
The sole source of supply of the apparatus known to the committee at this time is Krahnen IQS, GmbH, Paffrather Str. 13–15, D-51069 Koeln, Germany. If you are aware
of alternative suppliers, please provide this information to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible
technical committee, which you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7724 − 11 (2016)
FIG. 1 Schematic Diagram of NDA Test Equipment
5.5 Sieves, diameter 100 mm, of either phosphor bronze or stainless steel. The sieve shall be in accordance with Specification
E11. The sieve size to be used shall be agre
...
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