ASTM D3313-05a
(Test Method)Standard Test Method for Carbon Black—Individual Pellet Hardness
Standard Test Method for Carbon Black—Individual Pellet Hardness
SIGNIFICANCE AND USE
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.
Note 1—Test Method D 5230 is the preferred standard for testing of individual pellet hardness. It is recognized that Test Method D 3313 relies on operator judgement, thus adding an additional source of variation for this test.
SCOPE
1.1 This test method covers a method for measuring the hardness of individual pellets of carbon black.
1.2 The values stated in SI units are to be regarded as the standard. The values given 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
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Standards Content (Sample)
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Designation: D3313 − 05a
StandardTest Method for
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Carbon Black—Individual Pellet Hardness
This standard is issued under the fixed designation D3313; 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. Scope 4. Significance and Use
1.1 This test method covers a method for measuring the 4.1 Pellet hardness is related to several carbon black char-
hardness of individual pellets of carbon black. acteristics. Among these are mass strength and attrition. The
subsequent level of dispersion obtained in some mixed com-
1.2 The values stated in SI units are to be regarded as the
pounds containing the carbon black may be affected by pellet
standard. The values given in parentheses are for information
hardness.Acceptable pellet hardness must be agreed to by the
only.
user and the producer.
1.3 This standard does not purport to address all of the
NOTE 1—Test Method D5230 is the preferred standard for testing of
safety concerns, if any, associated with its use. It is the
individual pellet hardness. It is recognized that Test Method D3313 relies
responsibility of the user of this standard to establish appro-
on operator judgement, thus adding an additional source of variation for
priate safety and health practices and determine the applica-
this test.
bility of regulatory limitations prior to use.
5. Apparatus
2. Referenced Documents
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5.1 Pellet-Hardness Tester, of a type capable of measuring
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2.1 ASTM Standards:
the pellet hardness of the individual pellet in grams-force
D1511Test Method for Carbon Black—Pellet Size Distri-
(centinewtons). A suitable tester must exhibit the following
bution
characteristics:
D1799Practice for Carbon Black—Sampling Packaged
5.1.1 Initial contact force must be applied so that the force
Shipments
area rests lightly on the pellet before proceeding,
D1900Practice for Carbon Black—Sampling Bulk Ship-
5.1.2 Itmustbecapableofapplyingforceataconstantrate,
ments
5.1.3 It must possess an accurate means of measuring the
D4483Practice for Evaluating Precision for Test Method
applied force, and
StandardsintheRubberandCarbonBlackManufacturing
5.1.4 During the test, the applied force and base plate must
Industries
be controlled so as not to cause the pellet to move or roll prior
D5230Test Method for Carbon Black—Automated Indi-
to crushing.
vidual Pellet Hardness
E11Specification forWovenWireTest Sieve Cloth andTest NOTE 2—A two-pan torsion balance with 100-g dial and transparent
foot mounted so it can be moved directly over the pellet will serve to
Sieves
convert a balance to a pellet hardness tester, as needed.
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3. Summary of Test Method
5.2 Mechanical Sieve Shaker, (see Test Method D1511).
3.1 A sample of carbon black is passed through two sieves
5.3 Sieves—U.S. Standard sieves or equivalents, conform-
to isolate a fraction of uniform size.The most spherical pellets
ing to Specification E11. Sieve Nos. 12 (1700-µm) and 14
from this portion are selected and brought into contact with a
(1400-µm) shall be used.
measuring device as force is applied. Pellet hardness is the
maximum force required to crush the pellets.
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Thesolesourceofsupplyofthepellet-hardnesstester(Model-SPelletStrength
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This test method is under the jurisdiction ofASTM Committee D24 on Carbon Tester with lab jack) known to the committee at this time is A. L. Sweigart,
Black and is the direct responsibility of Subcommittee D24.51 on Carbon Black Technical Service Shop, 1206 Hemlock St., Borger, TX 79007. If you are aware of
Pellet Properties. alternative suppliers, please provide this information to ASTM International
Current edition approved Dec. 1, 2005. Published January 2006. Originally Headquarters.Your comments will receive careful consideration at a meeting of the
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approved in 1974. Last previous edition approved in 2005 as D3313–05. DOI: responsible technical committee, which you may attend.
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10.1520/D3313-05A. The sole source of supply of the mechanical sieve shaker (Ro-Tap) known to
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or the committee at this time is W. S. Tyler, 8570 Tyler Blvd., Mentor, OH 44060. If
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM you are aware of alternative suppliers, please provide this information to ASTM
Standards volume information, refer to the standard’s Document Summary page on International Headquarters. Your comments will receive careful consideration at a
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the ASTM website. meeting of the responsible technical committee, which you may attend.
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