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GB/T 12672-2009 English PDF (GBT12672-2009)

GB/T 12672-2009 English PDF (GBT12672-2009)

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GB/T 12672-2009: Acrylonitrile-butadiene-styrene (ABS) resin
GB/T 12672-2009
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.080.20
G 32
Replacing GB/T 12672-1990
Acrylonitrile-butadiene-styrene (ABS) resin
丙烯腈-丁二烯-苯乙烯(ABS)树脂
ISSUED ON: JULY 17, 2009
IMPLEMENTED ON: FEBRUARY 01, 2010
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Classification and naming ... 5 
4 Requirements ... 6 
5 Test method ... 6 
6 Inspection rules ... 8 
7 Signs ... 9 
8 Packaging, transportation, storage ... 9 
Appendix A (Informative) Comparison of national standard naming and enterprise
designation of ABS resin products ... 11 
Acrylonitrile-butadiene-styrene (ABS) resin
1 Scope
This standard specifies the classification, nomenclature, requirements, test methods,
inspection rules, marking, packaging, transportation, storage of acrylonitrile-butadiene-
styrene (ABS) resin (hereinafter referred to as ABS resin).
This standard is applicable to ABS resin, which is composed of styrene and acrylonitrile
copolymer as continuous phase AND polybutadiene and other components as dispersed
phase.
This standard does not apply to flame retardant, reinforced or other modified ABS
resins.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For the dated references, the subsequent amendments
(excluding corrections) or revisions do not apply to this Standard; however, parties who
reach an agreement based on this Standard are encouraged to study if the latest versions
of these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB/T 1040.2-2006 Plastics - Determination of tensile properties - Part 2: Test
conditions for moulding and extrusion plastics (ISO 527-2:1993, IDT)
GB/T 1043.1-2008 Plastics - Determination of Charpy impact properties - Part 1:
Non - instrumented impact test
GB/T 1633-2000 Plastics - Thermoplastic materials--Determination of Vicat
softening temperature (VST) (idt ISO 306:1994)
GB/T 2547-2008 Plastic resins - Sampling
GB/T 2918-1998 Plastics - Standard atmospheres for conditioning and testing (idt
ISO 291:1997)
GB/T 3398.2-2008 Plastics - Determination of hardness - Part 2: Rockwell hardness
(ISO 2039-2:1987, IDT)
GB/T 3682-2000 Determination of the melt mass-flow rate (MFR) and the melt
volume-flow rate (MVR) of thermoplastics (idt ISO 1133:1997)
of 23 °C ± 2 °C, a relative humidity of 50% ± 10%, for a duration of at least 16 hours.
All tests shall be carried out, in the standard test environment, which is specified in
GB/T 2918-1998, at a temperature of 23 °C ± 2 °C, a relative humidity of 50% ± 10%.
5.4 Appearance of particles
Carry out in accordance with the provisions of SH/T 1541-2006.
5.5 Melt's mass flow rate (MFR)
Carry out according to the provisions of method A in GB/T 3682-2000. The test
conditions are U (temperature: 220 °C, load: 10 kg).
5.6 Tensile properties
The specimen is 1A-type specimen, which is prepared in accordance with 5.2.
The state conditioning of the specimen shall be carried out, according to the provisions
of 5.3.
The test is carried out in accordance with the provisions of GB/T 1040.2-2006. When
testing the tensile modulus of elasticity, the test speed is 1 mm/min. When testing tensile
yield stress, the test speed is 50 mm/min.
5.7 Bending properties
The specimen is a long specimen of 80 mm × 10 mm × 4 mm, which is prepared
according to 5.2.
The state conditioning of the specimen shall be carried out, according to the provisions
of 5.3.
The test is carried out, according to the provisions of GB/T 9341-2008, at the test speed
of 2 mm/min.
5.8 Notched impact strength of simply supported beams
The specimen is a long specimen of 80 mm × 10 mm × 4 mm, which is prepared
according to 5.2. The specimen strip shall be notched, within 1 h ~ 4 h after injection
molding. The notch is the type-A notch in GB/T 1043.1-2008.
The state conditioning of the specimen shall be carried out, according to the provisions
of 5.3.
The test is carried out, according to the provisions of GB/T 1043.1-2008.
5.9 Vicat softening temperature
The specimen is a long specimen of 80 mm × 10 mm × 4 mm, which is prepared
according to 5.2.
The state conditioning of the specimen shall be carried out, according to the provisions
of 5.3.
The test is carried out, according to the provisions of the B50 method in GB/T 1633-
2000 (using a force of 50 N and a heating rate of 50 °C/h).
5.10 Rockwell hardness
The specimen is an injection-molded specimen, which has a recommended size of 50
mm × 50 mm × 6 mm AND is prepared in accordance with 5.2.
The state conditioning of the specimen shall be carried out, according to the provisions
of 5.3.
The test is carried out, according to the provisions of GB/T 3398.2-2008.
6 Inspection rules
6.1 Inspection classification and inspection items
The tensile modulus of elasticity only needs to be checked when the designation of ABS
resin product is determined. In addition to this item, the inspection of ABS resin
products is divided into two categories: type inspection and exit-factory inspection.
All items in Chapter 4 are type inspection items.
The exit-factory inspection of various ABS resins shall include particle appearance,
melt's mass flow rate, tensile yield stress, simply supported beam impact strength,
flexural strength, Vicat softening temperature, Rockwell hardness.
6.2 Group-batching rules and sampling plan
6.2.1 Group-batching rules
ABS resin is batched, by the same designation of products, which are produced on the
same production line, by the same raw materials, through the same process. The
manufacturer can also batch the products, according to a certain production cycle or
storage silo.
Products are inspected and accepted in batches.
6.2.2 Sampling plan
Production inspection can be sampled at the sampling port of the silo, OR a specific
sampling plan can be determined, according to the actual situation, such as the
production cycle.
The sampling of the packaged products shall be carried out, in accordance with the
provisions of GB/T 2547-2008.
6.3 Judgment rules and re-inspection rules
6.3.1 Judgment rules
ABS resin shall be inspected by the quality inspection department of the manufacturer,
in accordance with the test methods, which are specified in this standard. The quality
of the product shall be judged, according to the inspection results and the technical
requirements in this standard; meanwhile a certificate shall be provided.
When the product leaves the factory, each batch of products shall be accompanied by a
product quality inspection certificate. The certificate of conformity shall indicate the
product name, designation, batch number, implemented standard; meanwhile it shall be
stamped with a special seal for quality inspection and an inspector seal.
6.3.2 Re-inspection rules
If any indicator of the inspection result does not meet the requirements of this standard,
the item can be re-inspected by re-sampling. The re-inspection results are used as the
basis for the quality judgment of the batch of products.
7 Signs
There shall be obvious signs on the outer packaging bags of ABS resin products. The
content of the s...
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