ASTM D5230-14e1

Standard Test Method for Carbon Black—Automated Individual Pellet Hardness

SIGNIFICANCE AND USE
4.1 Individual pellet hardness is related to several carbon black characteristics. Among these are mass strength and attrition. The subsequent level of dispersion obtained in some mixed compounds containing the carbon black may be affected by pellet hardness. Acceptable pellet hardness must be agreed to by the user and the producer.
SCOPE
1.1 This test method covers a procedure for measuring individual pellet hardness of carbon black by the automated pellet hardness tester.  
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.  
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.

General Information

• Status: Historical
• Publication Date: 31-Aug-2014
• ICS: 83.040.20 - Rubber compounding ingredients
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.51 - Carbon Black Pellet Properties

Relations

• Replaces: ASTM D5230-14 - Standard Test Method for Carbon Black—Automated Individual Pellet Hardness
• Effective Date: 01-Sep-2014
• Referred By: ASTM D8466-22 - Standard Guide for Recovered Carbon Black—Carbon Black Test Methods for Testing rCB
• Effective Date: 01-Sep-2014
• Referred By: ASTM D5817-20 - Standard Practice for Carbon Black, Pelleted—Reduction, Blending, and Drying of Gross Samples for Testing
• Effective Date: 01-Sep-2014
• Referred By: ASTM D3053-23 - Standard Terminology Relating to Carbon Black
• Effective Date: 01-Sep-2014
• Referred By: ASTM D4122-17(2023) - Standard Practice for Carbon Black—Evaluation of an Industry Reference Black
• Effective Date: 01-Sep-2014

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D5230 − 14
Standard Test Method for
1
Carbon Black—Automated Individual Pellet Hardness
This standard is issued under the fixed designation D5230; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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 1.1 and 5.1 editorially in October 2016.
1. Scope either break with a rapid force reduction or the pellet will
simply compress. The individual pellet hardness is the maxi-
1.1 This test method covers a procedure for measuring
mum force prior to a force reduction of at least 3 cN or the
individual pellet hardness of carbon black by the automated
maximum force required to compress the pellet to 90 %,
pellet hardness tester.
whichever comes first.
1.2 The values stated in SI units are to be regarded as the
standard. The values in parentheses are for information only.
4. Significance and Use
1.3 This standard does not purport to address all of the
4.1 Individual pellet hardness is related to several carbon
safety concerns, if any, associated with its use. It is the
black characteristics. Among these are mass strength and
responsibility of the user of this standard to establish appro-
attrition. The subsequent level of dispersion obtained in some
priate safety and health practices and determine the applica-
mixedcompoundscontainingthecarbonblackmaybeaffected
bility of regulatory limitations prior to use.
by pellet hardness. Acceptable pellet hardness must be agreed
to by the user and the producer.
2. Referenced Documents
2
2.1 ASTM Standards:
5. Apparatus
D1511Test Method for Carbon Black—Pellet Size Distri-
5.1 Automated Pellet Hardness Tester, capable of achieving
bution
an absolute measuring accuracy of 62 cN (2 gf) for the force
D1799 Practice for Carbon Black—Sampling Packaged
measurement and 60.1 mm for the diameter measurement and
Shipments
a relative accuracy of 60.5 cN (0.5 gf) for the force measure-
D1900Practice for Carbon Black—Sampling Bulk Ship-
ment and 0.02 mm for the diameter measurement and consist-
ments
ing of the following major components and characteristics.
D4483Practice for Evaluating Precision for Test Method
5.1.1 A means for automatic loading of a pellet on the
StandardsintheRubberandCarbonBlackManufacturing
transport platen for transporting the pellet so as to contact the
Industries
second platen with a minimum force. Typically one platen
E11Specification forWovenWireTest Sieve Cloth andTest
containsaforcemeasuringdevice.Therequiredforcetodetect
Sieves
the contact shall not exceed 2 cN (2 gf),
5.1.2 A means for applying the force at a constant rate,
3. Summary of Test Method
5.1.3 Ameans for transporting the pellet so to minimize its
3.1 A sample of carbon black is passed through two sieves
movement during the application of force.
to isolate a fraction of uniform size.An appropriate amount of
5.1.4 Ameans for measuring the diameter of the individual
pellets from this portion is selected and placed into the tester.
pellet under test as measured along the axis of the application
The individual pellets are pressed against a platen with a load
of force.
cell for measuring force. As pressure is applied the pellet will
5.1.5 A control device for directing the instrument through
the test cycle that includes crushing the pellet under controlled
1
This test method is under the jurisdiction ofASTM Committee D24 on Carbon
conditions, measuring and storing the results of the initial
Black and is the direct responsibility of Subcommittee D24.51 on Carbon Black
diameter and crush force determinations, cleaning the frag-
Pellet Properties.
ments from the platen surfaces, and starting the next cycle.
Current edition approved Sept. 1, 2014. Published October 2014. Originally
5.1.6 An algorithm for determining the individual test end
approved in 1992. Last previous edition approved in 2013 as D5230–13. DOI:
10.1520/D5230-14E01.
point (determination) as the maximum observed force prior to
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the first occurrence of either a specified reduction in diameter
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
or a specified reduction in force from the maximum force
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. observed,
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
´1
D5230 − 14
5.1.7 A program for calculating for a specified number of 8.3 Conduct the test following the instructions in the equip-
pellets the d
...

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: D5230 − 14 D5230 − 14
Standard Test Method for
1
Carbon Black—Automated Individual Pellet Hardness
This standard is issued under the fixed designation D5230; 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 1.1 and 5.1 editorially in October 2016.
1. Scope
1.1 This test method covers a procedure for measuring individual pellet hardness of carbon black by the automated pellet
hardness tester.
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
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
2.1 ASTM Standards:
D1511 Test Method for Carbon Black—Pellet Size Distribution
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 passed through two sieves to isolate a fraction of uniform size. An appropriate amount of pellets
from this portion is selected and placed into the tester. The individual pellets are pressed against a platen with a load cell for
measuring force. As pressure is applied the pellet will either break with a rapid force reduction or the pellet will simply compress.
The individual pellet hardness is the maximum force prior to a force reduction of at least 3 cN or the maximum force required to
compress the pellet to 90 %, whichever comes first.
4. Significance and Use
4.1 Individual pellet hardness is related to several carbon black characteristics. Among these are mass strength and attrition. The
subsequent level of dispersion obtained in some mixed compounds containing the carbon black may be affected by pellet hardness.
Acceptable pellet hardness must be agreed to by the user and the producer.
5. Apparatus
5.1 Automated Pellet Hardness Tester, capable of achieving an absolute measuring accuracy of 62 cN (2 gf) for the force
measurement and 60.1 mm for the diameter measurement and a relative accuracy of 60.5 cN (0.5 gf) for the force measurement
and 0.02 mm for the diameter measurement and consisting of the following major components and characteristics.
5.1.1 A means for automatic loading of a pellet on the transport platen for transporting the pellet so as to contact the second
platen with a minimum force. Typically one platen contains a force measuring device. The required force to detect the contact shall
not exceed 2 cN (2 gf),
5.1.2 A means for applying the force at a constant rate,
1
This test method is under the jurisdiction of ASTM Committee D24 on Carbon Black and is the direct responsibility of Subcommittee D24.51 on Carbon Black Pellet
Properties.
Current edition approved Sept. 1, 2014. Published October 2014. Originally approved in 1992. Last previous edition approved in 2013 as D5230 – 13. DOI:
10.1520/D5230-14.10.1520/D5230-14E01.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
´1
D5230 − 14
5.1.3 A means for transporting the pellet so to minimize its movement during the application of force.
5.1.4 A means for measuring the diameter of the individual pellet under test as measured along the axis of the application of
force.
5.1.5 A control device for directing the instrument through the test cycle that includes crushing the pellet under controlled
conditions, measuring and storing the results of the initial diameter and crush force determinations, cleaning the fragments from
the platen surfaces, and starting the next cycle.
5.1.6 An algorithm for determining the individual
...