ASTM D7724-18e1

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 31-May-2018
• ICS: 83.040.20 - Rubber compounding ingredients
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.31 - Non-Carbon Black Components of Carbon Black

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation: D7724 − 18
Standard Test Method for
Carbon Black—Non-Dispersible Matter by Mechanical
1
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
ε NOTE—Corrected Section 11 editorially in January 2020.
1. Scope E11 Specification for Woven Wire Test Sieve Cloth and Test
Sieves
1.1 This test method covers the determination of non-
dispersible matter after mechanical water flushing of regular
3. Summary of Test Method
untreated carbon blacks. It may not be applicable to oil-treated
3.1 A sample of carbon black is mechanically flushed with
carbon blacks because the oil would prevent proper wetting of
water through a wire-mesh screen of a specified size until all
the black by water.
that remains is a non-dispersible matter of carbon black. The
1.2 The values stated in SI units are to be regarded as
non-dispersible matter is dried, weighed, and the amount of
standard. No other units of measurement are included in this
residue is expressed as mg/kg (ppm) of the original sample.
standard.
4. Significance and Use
1.3 This standard does not purport to address all of the
4.1 The quantity of non-dispersible matter of carbon black
safety concerns, if any, associated with its use. It is the
is important in some molded or extruded products as it may
responsibility of the user of this standard to establish appro-
relate to the surface appearance of those products. The maxi-
priate safety, health, and environmental practices and deter-
mum amount of non dispersible matter and the minimum size
mine the applicability of regulatory limitations prior to use.
of the particles to be analyzed in each application is normally
1.4 This international standard was developed in accor-
determined and agreed to between the user and the producer.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Apparatus
Development of International Standards, Guides and Recom-
3
5.1 Sieve Apparatus, as shown in Fig. 1.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. 5.2 Balance, with a sensitivity of 0.01 g.
5.3 Analytical Balance, with a sensitivity of 0.1 mg.
2. Referenced Documents
5.4 Oven, gravity-convection type, capable of temperature
2
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-
3
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
Industries 5.6 Weighing Dishes.
6. Precautions
1
6.1 Install the apparatus as described in the manufacturer’s
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
instructions and keep it clean at all times to prevent contami-
Black Components of Carbon Black.
nation.
Current edition approved June 1, 2018. Published July 2018. Originally approved
in 2011. Last previous edition approved in 2016 as D7724 – 11 (2016). DOI:
3
10.1520/D7724-18E01. The sole source of supply of the apparatus known to the committee at this time
2
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 [e-mail]. 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
1
the ASTM website. 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
1

---------------------- Page: 1 ----------------------
´1
D7724 − 18
FIG. 1 Schematic Diagram of NDA Test Equipment
6.2 Examine the sieves each time they are used to make sure 8.6 Based on a predefined program the sample will be
that no cracks or holes have developed. flushed through the sieve by the water spray nozzles. For
details refer to Fig. 1.
7. Sampling
8.7 A vacuum is applie
...

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.
´1
Designation: D7724 − 18 D7724 − 18
Standard Test Method for
Carbon Black—Non-Dispersible Matter by Mechanical
1
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
ε NOTE—Corrected Section 11 editorially in January 2020.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
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
3
5.1 Sieve Apparatus, as shown in Fig. 1.
5.2 Balance, with a sensitivity of 0.01 g.
1
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 June 1, 2018. Published July 2018. Originally approved in 2011. Last previous edition approved in 2016 as D7724 – 11 (2016). DOI:
10.1520/D7724-18.10.1520/D7724-18E01.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
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
1
technical committee, which you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
´1
D7724 − 18
FIG. 1 Schematic Diagram of NDA Test Equipment
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.
3
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 agreed upon between the purchaser and the carbon black manufacture.
5.6 Weighing Dishes.
6. Precautions
6.1 Install the apparatus as described in the manufacturer’s instructions and keep it clean at all times to prevent contam
...