ASTM D3192-00

Standard Test Methods for Carbon Black Evaluation in NR (Natural Rubber)

SCOPE
1.1 These test methods cover the standard materials, test formulation, mixing procedure, and test methods for the evaluation and production control of carbon blacks in natural rubber (NR).  
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: 09-May-2000
• ICS: 83.040.20 - Rubber compounding ingredients
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.71 - Carbon Black Testing in Rubber

Relations

• Replaced By: ASTM D3192-02 - Standard Test Methods for Carbon Black Evaluation in NR (Natural Rubber)
• Effective Date: 10-Jun-2002

Standards Content (Sample)

Designation: D 3192 – 00
Standard Test Methods for
1
Carbon Black Evaluation in NR (Natural Rubber)
This standard is issued under the fixed designation D 3192; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope carbon black production. They may also be used for the
preparation of reference compounds, to confirm the day-to-day
1.1 These test methods cover the standard materials, test
reliability of testing operations used in the rubber industry, for
formulation, mixing procedure, and test methods for the
the evaluation of experimental compounds, and quality control
evaluation and production control of carbon blacks in natural
of production compounds.
rubber (NR).
1.2 The values stated in SI units are to be regarded as the
4. Standard Test Formula
standard. The values in parentheses are for information only.
4.1 Standard Formula:
1.3 This standard does not purport to address all of the
A
Material IRM No. Quantity, parts
safety concerns, if any, associated with its use. It is the
by mass
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- Natural rubber, SMR L . 100.00
Stearic acid 21 3.00
bility of regulatory limitations prior to use.
Zinc oxide 91 5.00
Benzothiazyl disulfide 2 0.60
2. Referenced Documents
Sulfur 31 2.50
B
Carbon black . 50.00
2.1 ASTM Standards:
Total 161.10
D 412 Test Methods for Vulcanized Rubber and Thermo-
C
Batch factor:
2
plastic Rubbers and Thermoplastic Elastomers— Tension
Test Method A—Mill 4.00
D 1799 Practice for Carbon Black—Sampling Packaged
Test Method B—Internal Mixer 6.00
2
Test Method C—Miniature Internal 0.40
Shipments
Mixer
D 1900 Practice for Carbon Black—Sampling Bulk Ship-
_____________
2
ments
A
D 2084 Test Method for Rubber Property—Vulcanization IRM 91 is available from R. E. Carroll, Inc., 1570 North Olden Ave., Trenton, NJ
2
08638; (800) 257–9365. IRM 2, IRM 21 and IRM 31 are available from Akron
Using Oscillating Disk Cure Meter
Rubber Development Lab, 2887 Gilchrist Road, Akron, OH 44305; (330)
D 3182 Practice for Rubber—Materials, Equipment, and
794–6600.
B
Procedures for Mixing Standard Compounds and Prepar-
Use 75.00 parts by mass of carbon blacks in the N-800 and N-900 series.
2
C
ing Standard Vulcanized Sheets Weigh rubber and carbon black to the nearest 1 g, sulfur and accelerator to the
nearest 0.02 g, and all other compounding materials to the nearest 0.1 g.
D 4483 Practice for Determining Precision for Test Method
2
Standards in the Rubber and Carbon Black Industries
5. Sampling and Sample Preparation
5.1 Samples shall be taken in accordance with Practice
3. Significance and Use
D 1799 or Practice D 1900.
3.1 The major portion of carbon black consumed by the
5.2 The carbon black shall be conditioned before weighing
rubber industry is used to improve the physical properties, life
and mixing by heating for1hinan oven set at 125 6 1°C. The
expectancy, and utility of rubber products. These test methods
black shall be placed in an open vessel of suitable dimensions
provide a natural rubber formulation and directions for evalu-
so that the depth of black is no more than 10 mm during
ating carbon black intended for use in rubber products.
conditioning. The black conditioned as above shall be stored in
3.2 These test methods may be used to characterize carbon
a closed moisture-proof container until ready for mixing.
black in terms of specific properties of the standard compound.
These test methods are useful for the quality assurance of
6. Mixing Procedures
6.1 For general mixing procedure refer to Practice D 3182.
1
The following mixing procedures are acceptable in testing
These test methods are under the jurisdiction of ASTM Committee D24 on
Carbon Black and are the direct responsibility of Subcommittee D24.71 on Carbon
carbon black: 1) Test Method A—Mill Mix, 2) Test Method
Black Testing in Rubber.
B—Internal Mixer, and 3) Test Method C—Miniature Internal
Current edition approved May 10, 2000. Published July 2000. Originally
Mixer.
published as D 3192-73. Last previous edition D 3192-97.
2
Annual Book of ASTM Standards, Vol 09.01.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D 3192
6.2 Mill Mix—Test Method A: Duration, min Accumulative,
min
6.2.1 Set the mill opening at 1.4 mm (0.055 in.) and adjust and maintain roll temperature at 70 6 5°C. 0 0
3
6.2.2 Add rubber and band on the front roll. Make two ⁄4cuts from each side. 2.0 2.0
3
6.2.3 Set mill opening at 1.65 mm (0.065 in.). Add stearic acid. Make one ⁄4 cut from each side. 2.5 4.5
3
6.2.4 Add sulfur, accelerator, and zinc oxide. Make two ⁄4 cuts from each side. 2.0 6.5
6.2
...