GB/T 36089-2018 English PDF (GBT36089-2018)

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GB/T 36089-2018: Acrylonitrile-butadiene rubber (NBR)
GB/T 36089-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.060
G 35
Acrylonitrile - Butadiene Rubber (NBR)
丙烯腈-丁二烯橡胶 (NBR)
ISSUED ON. MARCH 15, 2018
IMPLEMENTED ON. OCTOBER 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative References ... 4 
3 Technical Requirements ... 5 
4 Test Methods ... 6 
5 Inspection Rules ... 8 
6 Packaging, Marking, Transportation and Storage ... 9 
7 Shelf Life ... 9 
Acrylonitrile - Butadiene Rubber (NBR)
1 Scope
This Standard specifies the technical requirements, test methods, inspection rules,
product packaging, marking, transportation, storage and shelf life of acrylonitrile-
butadiene rubber (NBR) [namely, nitrile rubber (NBR)].
This Standard is applicable to nitrile rubber, which takes butadiene and acrylonitrile as
the monomer, and adopts low-temperature emulsion polymerization in production; this
standard is applicable to three types of nitrile rubber, namely, intermediately bound
acrylonitrile, intermediately and highly bound acrylonitrile, and highly bound
acrylonitrile.
2 Normative References
The following documents are indispensable to the application of this Standard. In terms
of references with a specified date, only versions with a specified date are applicable
to this Standard. The latest version (including all the modifications) of references
without a specified date is applicable to this Standard.
GB/T 528 Rubber, Vulcanized or Thermoplastic - Determination of Tensile Stress-
strain Properties
GB/T 531.1 Rubber, Vulcanized or Thermoplastic - Determination of Indentation
Hardness - Part 1. Duromerer Method (Shore Hardness)
GB/T 1232.1 Rubber, Unvulcanized - Determinations Using a Shearing-disc
Viscometer - Part 1. Determination of Mooney Viscosity
GB/T 4498.1-2013 Rubber - Determination of Ash - Part 1. Muffle Furnace Method
GB/T 9869 Rubber - Measurement of Vulcanization Characteristics with the
Oscillating Disc Curemeter
GB/T 15340 Rubber, Raw Natural and Raw Synthetic - Sampling and Further
Preparative Procedures
GB/T 16584 Rubber - Measurement of Vulcanization Characteristics with
Rotorless Curemeters
GB/T 19187 Sampling Procedures for Inspection of Raw Synthetic Rubber
GB/T 19188 Rubber, Raw Natural and Raw Synthetic - General Guidance on
Storage
GB/T 24131-2009 Rubber, Raw - Determination of Volatile Matter Content
GB/T 24797.3 Film for Wrapping Rubber Bales – Part 3. Ethylene-propylene-diene
Rubber (EPDM), Acrylonitrilebutadiene Rubber (NBR), Hydrogenerated Nitrile-
butadiene Rubber (HNBR), Acrylic-ethylene Rubber (AEM) and Acrylic Rubber
(AMC)
GB/T 34685-2017 Acrylonitrile-butadiene Rubber (NBR) - Evaluation Procedure
SH/T 1157.1 Rubber, Raw - Determination of Bound Acrylonitrile Content in
Acrylonitrile-butadiene Rubber (NBR) - Part 1. Combustion (Dumas) Method
SH/T 1157.2-2015 Rubber, Raw - Determination of Bound Acrylonitrile Content in
Acrylonitrile-butadiene Rubber (NBR) - Part 2. Kjeldahl Method
SH/T 1159-2010 Acrylonitrile-butadiene Rubber (NBR) - Determination of the
Swelling Ratio
3 Technical Requirements
3.1 Appearance
The primary shape of nitrile rubber is block, with uniform colors and no foreign matters.
3.2 Technical Indicators
Please refer to Table 1 for the test items and technical indicators of nitrile rubber.
hardness tester.
5 Inspection Rules
5.1 Inspection Items
5.1.1 Model inspection
In accordance with the technical requirements in Table 1, model inspection shall be
conducted in trial production of new products; when there are significant changes in
raw materials and technologies; when production is resumed after suspension; after a
certain stipulated inspection cycle. In terms of model inspection items in Table 1,
different inspection cycles and frequencies can be stipulated.
5.1.2 Exit-factory inspection
Volatile compounds, Mooney viscosity and compound acrylonitrile in Table 1 are exit-
factory inspection items. Through the negotiation with users, other items in Table 1 can
also be stipulated as exit-factory inspection items.
5.2 Group Rules and Sampling Plans
5.2.1 Group rules
Condensed and dried products based on a jar of evenly mixed rubber cement shall be
considered as one batch. Products with uniform quality, and the same raw materials
and technological conditions shall be considered as one batch. The mass of each
batch shall not exceed 100 t.
5.2.2 Sampling plans
In exit-factory inspection, take samples in accordance with time frames. Samples that
are taken by time frames shall be prepared in accordance with GB/T 15340. In
arbitration test, conduct sampling and sample preparation in accordance with the
stipulation in GB/T 19187.
5.3 Determination Rules
5.3.1 Exit-factory determination rules
Conduct inspection and acceptance check in accordance with the mixed laboratory
sample stipulated in GB/T 19187. When any item does not conform to the technical
requirements in Table 1, take the reserved sample and conduct re-inspection of the
unqualified item. In accordance with the re-inspection result, determine the mass.
5.3.2 Arbitration determination rules