GB/T 40006.3-2021 English PDF (GBT40006.3-2021)

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GB/T 40006.3-2021: Plastics - Recycled plastics - Part 3: Polypropylene(PP) materials
GB/T 40006.3-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.080.20
CCS G 32
Plastics - Recycled plastics -
Part 3: Polypropylene (PP) materials
ISSUED ON: MAY 21, 2021
IMPLEMENTED ON: DECEMBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3 
Introduction ... 4 
1 Scope ... 6 
2 Normative references ... 6 
3 Terms and definitions ... 8 
4 Classification and designation... 8 
5 Requirements ... 8 
6 Test methods ... 10 
7 Inspection rules ... 13 
8 Marking ... 15 
9 Packaging, transportation and storage ... 15 
Appendix A (Informative) Typical infrared spectrograms of polypropylene ... 17 
Appendix B (Informative) Other properties of polypropylene recycled plastic 19 
Bibliography ... 20 
Plastics - Recycled plastics -
Part 3: Polypropylene (PP) materials
1 Scope
This document specifies the classification and designation, requirements, test
methods, inspection rules, marking, packaging, transportation and storage, etc.
of polypropylene recycled plastics.
This document applies to polypropylene recycled plastic particles made from
waste polypropylene plastics as raw materials through processes such as
screening, classification, cleaning, melt extrusion granulation (including
granulation processes such as bracing, hot cutting and/or water cutting). The
matrix of the polypropylene recycled plastic is all propylene homopolymers
specified in GB/T 2546.1, as well as other propylene copolymers with 1-olefin
monomers less than 50% in mass fraction, and a blend of the above polymers
with a mass fraction of not less than 50%.
This document does not apply to polypropylene recycled plastics from
hazardous wastes and radioactive wastes such as medical waste, pesticide
packaging.
This document does not apply to polyethylene and polypropylene mixed
recycled plastics.
2 Normative references
The contents of the following documents, through normative references in this
text, constitute indispensable provisions of this document. Among them, for
dated references, only the edition corresponding to that date applies to this
document. For undated references, the latest edition (including all amendments)
applies to this document.
GB/T 1033.1 Plastics - Methods for determining the density of non-cellular
plastics - Part 1: Immersion method, liquid pycnometer method and titration
method
GB/T 1040.2 Plastic - Determination of tensile properties - Part 2: Test
conditions for moulding and extrusion plastic
GB/T 1043.1-2008 Plastics - Determination of Charpy impact properties -
Part 1: Non-instrumented impact test
GB/T 2035 Terms and definitions for plastics
GB/T 2546.2-2003 Plastics - Polypropylene (PP) moulding and extrusion
materials - Part 2: preparation of test specimens and determination of
properties
GB/T 2547 Plastic resins - Sampling
GB/T 2918 Plastics - Standard atmospheres for conditioning and testing
GB/T 3682.1 Plastics - Determination of the melt mass-flow rate (MFR) and
melt volume-flow rate (MVR) of thermoplastics - Part 1: Standard method
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 9341 Plastics - Determination of flexural properties
GB/T 9345.1-2008 Plastics - Determination of ash - Part 1: General methods
GB/T 17037.1-2019 Plastics - Injection moulding of test specimens of
thermoplastic materials - Part 1: General principles, and moulding of
multipurpose and bar test specimens
GB/T 19466.3 Plastics - Differential scanning calorimetry (DSC) - Part 3:
Determination of temperature and enthalpy of melting and crystallization
GB/T 19466.6 Plastics - Differential scanning calorimetry (DSC) - Part 6:
Determination of oxidation induction time (isothermal OIT) and oxidation
induction temperature (dynamic OIT)
GB/T 30102 Plastics - Guidelines for the recovery and recycling of plastic
waste
GB/T 37426 Plastics - Test specimens
GB/T 39690.1-2020 Plastics - Mixtures of polypropylene (PP) and
polyethylene (PE) recyclate derived from PP and PE used for flexible and
rigid consumer packaging - Part 1: Designation system and basis for
specification (ISO 18263-1:2015, IDT)
GB/T 40006.1-2021 Plastics - Recycled plastic - Part 1: General rules
SH/T 1541.1 Plastics - Test methods for the appearance of plastics - Part 1:
Visual method
6 Test methods
6.1 Determination of test results
For the test results, adopt the rounding value comparison method. It shall be
carried out in accordance with the provisions of GB/T 8170.
6.2 Specimen preparation
For the preparation of injection-moulded specimens of polypropylene recycled
plastic, see the provisions of 3.2 in GB/T 2546.2-2003.
According to GB/T 17037.1-2019, prepare specimens. The shape of the
specimen conforms to the tensile specimen type A1 and the bar specimen type
B1 (80 mm×10 mm×4 mm) specified in GB/T 37426.
6.3 Standard atmospheres for conditioning and testing of specimens
6.3.1 Conditioning of specimens
Unless otherwise specified in the test method, for unfilled PP recycled plastic,
the conditioning of the specimen shall be in accordance with the provisions of
GB/T 2918. The atmosphere for conditioning is temperature 23 °C±2 °C; time
is at least 40 h and not more than 96 h. For the specimens of filled PP recycled
plastic material, the requirement of relative humidity of 50%±10% shall be
added.
6.3.2 Standard atmospheres for testing
All tests shall be carried out in the standard test atmospheres specified in GB/T
2918. The temperature is 23 °C±2 °C. The relative humidity is 50%±10%.
6.4 Qualitative analysis of main material
6.4.1 Infrared
According to the infrared spectroscopy of transmission method and attenuated
total reflection method specified in Appendix A of GB/T 40006.1-2021, the
material is qualitatively determined.
The film pressing temperature is 210 °C. The recommended film thickness is
30 μm~40 μm.
For the compressed film samples, perform full-band infrared spectroscopy
scans. The resolution is 4 cm-1. The number of scans is at least 32 times.
6.14 Charpy notched impact strength
The injection-moulded specimens are type B1 80 mm×10 mm×4 mm bar
specimens prepared according to 6.2.
The conditioning of specimens and the standard atmospheres for testing shall
be carried out in accordance with 6.3.
The test is carried out in accordance with the provisions of GB/T 1043.1-2008.
It is recommended to use machined notch. The spline shall be notched within
1 h~4 h of injection moulding. The notch type is type A.
6.15 Oxidation induction time
Test according to GB/T 19466.6. The test temperature is 200 °C. The test
container is an aluminum dish. Take three specimens for testing and report the
average value.
7 Inspection rules
7.1 Inspection classification and inspection items
7.1.1 Inspection classification
The inspection of polypropylene recycled plastic products can be divided into
two types: exit-factory inspection and type inspection.
7.1.2 Inspection items
7.1.2.1 Exit-factory inspection items
The exit-factory inspection of polypropylene recycled plastics shall include at
least:
a) Particle appearance;
b) Ash;
c) Density;
d) Melt mass-flow rate;
e) Tensile strength;
f) Odor.
7.1.2.2 Type inspection items
Polypropylene recycled plastics s...