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GB/T 37427-2019 English PDF (GBT37427-2019)

GB/T 37427-2019 English PDF (GBT37427-2019)

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GB/T 37427-2019: Plastics -- Acrylonitrile-butadiene-styrene (ABS) compound for automobile

This Standard specifies the classification and naming, technical requirements, test methods, inspection rules, markings and accompanying documents, packaging, transportation and storage of acrylonitrile-butadiene-styrene (ABS) compound for automobile. This Standard applies to melt-blending ABS compounds for automotive interior parts, exterior parts and functional parts, of which, ABS is the base, heatresistant agent and/or other additives are added.
GB/T 37427-2019
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 83.080.20
G 32
Plastics - Acrylonitrile-butadiene-styrene (ABS)
compound for automobile
ISSUED ON: MAY 10, 2019
IMPLEMENTED ON: APRIL 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Classification and naming ... 5
4 Technical Requirements ... 6
5 Test methods ... 7
6 Inspection rules ... 10
7 Markings and accompanying documents ... 11
8 Packaging, transportation and storage ... 11
Plastics - Acrylonitrile-butadiene-styrene (ABS)
compound for automobile
1 Scope
This Standard specifies the classification and naming, technical requirements, test methods, inspection rules, markings and accompanying documents,
packaging, transportation and storage of acrylonitrile-butadiene-styrene (ABS) compound for automobile.
This Standard applies to melt-blending ABS compounds for automotive interior parts, exterior parts and functional parts, of which, ABS is the base, heat- resistant agent and/or other additives are added.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 250-2008, Textiles. Tests for colour fastness. Grey scale for assessing change in colour
GB/T 1033.1-2008, Plastics. Methods for determining the density of non- cellular plastics. Part 1: Immersion method, liquid pycnometer method and titration method
GB/T 1040.2-2006, Plastic. Determination of tensile properties. Part 2: Test conditions for moulding and extrusion plastic
GB/T 1633-2000, Plastics. Thermoplastic materials. Determination of Vicat softening temperature (VST)
GB/T 1843-2008, Plastics. Determination of Izod impact strength
GB/T 2547-2008, Plastic resins. Sampling
GB/T 2918-2018, Plastics. Standard atmospheres for conditioning and
testing
GB/T 3682.1-2018, Plastics. Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics. Part 1:Standard method 5.3 Particle appearance
Perform according to the provisions of SH/T 1541-2006.
5.4 Density
The sample is the middle portion of the type-1A injection molding sample that is prepared in accordance with 5.1.
The conditioning of the sample is carried out in accordance with 5.2.
The test shall be carried out in accordance with the provisions of method A of GB/T 1033.1-2008.
5.5 Melt mass flow rate
The test shall be carried out in accordance with the provisions of method A of GB/T 3682.1-2018. The test condition is U (temperature: 220??C, load: 10 kg). Before the test, the sample shall be dried at (80 ?? 3)??C for 2 h.
5.6 Tensile yield stress
The sample is the type-1A sample that is prepared in accordance with 5.1. The conditioning of the sample is carried out in accordance with 5.2.
The test is carried out according to GB/T 1040.2-2006; it uses type-1A sample; the test speed is 50 mm/min.
5.7 Bending strength and flexural modulus
The sample is an 80 mm ?? 10 mm ?? 4 mm strip sample that is prepared in
accordance with 5.1.
The conditioning of the sample is carried out in accordance with 5.2.
The test is carried out according to the provisions of GB/T 9341-2008; the test speed is 2 mm/min.
5.8 Izod notched impact strength
The sample is an 80 mm ?? 10 mm ?? 4 mm strip sample that is prepared in
accordance with the provisions of 5.1. The notch of the spline shall be processed within 1h ~ 4h after injection molding; the notch type is type-A in GB/T1 843-2008. The spline, of which the notch is processed, is the sample of the Izod notched impact strength.
The conditioning of the sample is carried out in accordance with 5.2.
The sample is an injection molding sample, of which the diameter is (80 ?? 2) mm (the thickness does not exceed 10 mm), that is prepared in accordance with 5.1.
The conditioning of the sample is carried out in accordance with 5.2.
The test is carried out in accordance with the provisions of ISO 6452:2007; it uses a method of determining the condensed component mass. The test
temperature is (100 ?? 0.5)??C; the heating time is (16 ?? 0.1) h.
6 Inspection rules
6.1 Inspection classification
The inspection of ABS compounds for automobile can be divided into two types: type inspection and factory inspection.
6.2 Inspection items
All items in Chapter 4 are type inspection items. In any of the following cases, type inspection shall be carried out:
a) when the new product is tested and certified;
b) after formal production, if there is a major change in raw materials or processes, which may affect product performance;
c) when the production is resumed after the production unit is overhauled; d) when the factory inspection result is significantly different from the previous type inspection result;
e) when the superior quality supervision institution proposes a requirement to carry out type inspection.
The factory inspection of ABS compounds for automobile shall include at least density, melt mass flow rate, Izod notched impact strength, and Vicat softening temperature.
6.3 Batch rules
The ABS compounds for automobiles are batched with the products of the same designation which are produced by the same production line, the same raw materials, and the same process. The production factory can also batch the products according to a certain production cycle or storage silo. Products are inspected and accepted in batches.
6.4 Sampling plan

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