GB/T 40006.7-2021Plastics - Recycled plastics - Part 7: Polycarbonate (PC) materials (English PDF)
塑料 再生塑料 第7部分：聚碳酸酯(PC)材料
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 11, 2021
Implementation date
May 1, 2022
Scope
GB/T 40006.7-2021 is the English-translated version of 塑料 再生塑料 第7部分：聚碳酸酯(PC)材料.
Part 7 of China's national standard series for recycled plastics, covering polycarbonate. It specifies the classification and naming, the requirements, the test methods and the inspection rules.
Polycarbonate is the most valuable of the commodity engineering plastics and the hardest to recycle well, and both facts have the same cause: it is a polyester, and polyesters hydrolyse.
Water absorbed into the granules will, at the temperature needed to melt it, cut the polymer chains - so a batch dried inadequately before processing comes out with a fraction of its molecular weight and none of the toughness that makes polycarbonate worth using.
Recycled feedstock is worse in this respect than virgin, because it has spent years absorbing moisture and has already been through one heat history. The standard's requirements accordingly focus on molecular weight and impact strength, which are the properties that reveal whether the material was handled properly.
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Document preview — GB/T 40006.7-2021
National Standard of the People's Republic of China
- Classification
- G 32
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Classification and designation
- 5 Requirements
- 6 Test method
- 7 Inspection rules
- 8 Marking
- 9 Packaging, transportation and storage
Foreword
This document specifies the classification and designation, requirements, test methods, inspection rules, marking, packaging, transportation and storage of recycled PC plastics.
This document is applicable to recycled PC plastics granules made of waste polycarbonate plastics by screening, sorting, cleaning, melting extrusion and granulation, and other processes. The matrix of the recycled PC plastic is thermoplastic polyester containing carbonic acid and aromatic diphenol compounds specified in GB/T 35513.1, and the polyester may be homopolymer, copolymer or mixture of the two.
This document does not apply to recycled PC plastics from hazardous wastes such as medical wastes, pesticide packaging and radioactive wastes.
This document does not apply to mixed recycled plastics of polycarbonate and other resin materials.
1 Scope
This document specifies the classification and designation, requirements, test methods, inspection rules, marking, packaging, transportation and storage of recycled PC plastics.
This document is applicable to recycled PC plastics granules made of waste polycarbonate plastics by screening, sorting, cleaning, melting extrusion and granulation, and other processes. The matrix of the recycled PC plastic is thermoplastic polyester containing carbonic acid and aromatic diphenol compounds specified in GB/T 35513.1, and the polyester may be homopolymer, copolymer or mixture of the two.
This document does not apply to recycled PC plastics from hazardous wastes such as medical wastes, pesticide packaging and radioactive wastes.
This document does not apply to mixed recycled plastics of polycarbonate and other resin materials.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1033.1 Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion method liquid pyknometer method and titration method
GB/T 1040.1-2018 Plastics — Determination of tensile properties — Part 1: General principles
GB/T 1040.2 Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and extrusion plastics
GB/T 1843-2008 Plastics — Determination of izod impact strength
GB/T 2035 Terms and definitions for plastics
GB/T 2547 Plastic resins — Sampling
GB/T 2918 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
GB/T 8170 Rules of rounding off for numerical values & expression and judgment 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 14190-2017 Testing methods of fiber grade polyester (PET) chip
GB/T 17037.1 Plastics — Injection moulding of test specimens of thermoplastic materials — Part 1:General principles,and moulding of multipurpose and bar test specimens
GB/T 19466.2 Plastics — Differential scanning calorimetry (DSC) — Part 2: Determination of glass transition temperature
GB/T 30102 Plastics — Guidelines for recovery and recycling of plastics waste
GB/T 33352 General rules of screening application of restricted substances in electrical and electronic products — X-Ray fluorescence spectrometry
GB/T 35513.2-2017 Plastics - Polycarbonate (PC) moulding and extrusion materials - Part 2: Preparation of test specimens and determination of properties
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1033.1 Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion method liquid pyknometer method and titration method
GB/T 1040.1-2018 Plastics — Determination of tensile properties — Part 1: General principles
GB/T 1040.2 Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and extrusion plastics
GB/T 1843-2008 Plastics — Determination of izod impact strength
GB/T 2035 Terms and definitions for plastics
GB/T 2547 Plastic resins — Sampling
GB/T 2918 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
GB/T 8170 Rules of rounding off for numerical values & expression and judgment 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 14190-2017 Testing methods of fiber grade polyester (PET) chip
GB/T 17037.1 Plastics — Injection moulding of test specimens of thermoplastic materials — Part 1:General principles,and moulding of multipurpose and bar test specimens
GB/T 19466.2 Plastics — Differential scanning calorimetry (DSC) — Part 2: Determination of glass transition temperature
GB/T 30102 Plastics — Guidelines for recovery and recycling of plastics waste
GB/T 33352 General rules of screening application of restricted substances in electrical and electronic products — X-Ray fluorescence spectrometry
GB/T 35513.2-2017 Plastics - Polycarbonate (PC) moulding and extrusion materials - Part 2: Preparation of test specimens and determination of properties
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 40006.1-2021, GB/T 2035 and GB/T 30102 apply.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 40006.1-2021, GB/T 2035 and GB/T 30102 apply.
4 Classification and designation
The designation and classification of recycled PC plastics shall be carried out according to GB/T 40006.1-2021.
The characteristic properties of recycled PC plastics are melt mass-flow rate (MFR) and notched izod impact strength.
The melt mass-flow rate is measured according to GB/T 3682.1-2018, with the test condition of 300°C and the load of 1.2 kg. The melt mass-flow rate is divided into three intervals, each of which is represented by a numeric code, as shown in Table 1. If the melt mass-flow rate is close to the critical value of the interval, the supplier shall specify the interval to which it belongs.
Table 1 Melt mass-flow rate interval in character set 4
Number code Melt mass-flow rate g/10min 1 <=10 2 >10~35 3 >35
The notched izod impact strength is measured at 6.15 and is divided into five intervals, each of which is represented by a numeric code, as shown in Table 2. If the notched izod impact strength is near the critical value of the interval, the supplier shall indicate the interval to which it belongs.
Table 2 Notched izod impact strength interval in character set 4
Number code Notched izod impact strength kJ/m2 1 <=5 2 >5~30 3 >30~40 4 >40~50 5 >50
See Table 3 for designation rules.
Table 3 Rules for designation
National standard reference No. Characteristic project set
Character set 1 Character set 2 Character set 3 Character set 4 Character set 5
Optional Required Optional Optional Optional Optional
GB/T 40006.1 PC (REC)-B2-C-1 No M 1-5 No
Example: Recycled PC plastic from industrial product (1), which is in blue (B2) and in cylindrical (C) shape, has no filler and is used for injection molding (M), with the melt mass-flow rate (MFR 300/1.2kg) of 8 g/10min (1) and the notched izod impact strength of 63 kJ/m2 (5), is named:
GB/T 40006.1-PC (REC)-B2-C-1, M, 1-5 [simplified name: PC (REC)-B2-C-1]
4 Classification and designation
The designation and classification of recycled PC plastics shall be carried out according to GB/T 40006.1-2021.
The characteristic properties of recycled PC plastics are melt mass-flow rate (MFR) and notched izod impact strength.
The melt mass-flow rate is measured according to GB/T 3682.1-2018, with the test condition of 300°C and the load of 1.2 kg. The melt mass-flow rate is divided into three intervals, each of which is represented by a numeric code, as shown in Table 1. If the melt mass-flow rate is close to the critical value of the interval, the supplier shall specify the interval to which it belongs.
Table 1 Melt mass-flow rate interval in character set 4
Number code Melt mass-flow rate g/10min 1 <=10 2 >10~35 3 >35
The notched izod impact strength is measured at 6.15 and is divided into five intervals, each of which is represented by a numeric code, as shown in Table 2. If the notched izod impact strength is near the critical value of the interval, the supplier shall indicate the interval to which it belongs.
Table 2 Notched izod impact strength interval in character set 4
Number code Notched izod impact strength kJ/m2 1 <=5 2 >5~30 3 >30~40 4 >40~50 5 >50
See Table 3 for designation rules.
Table 3 Rules for designation
National standard reference No. Characteristic project set
Character set 1 Character set 2 Character set 3 Character set 4 Character set 5
Optional Required Optional Optional Optional Optional
GB/T 40006.1 PC (REC)-B2-C-1 No M 1-5 No
Example: Recycled PC plastic from industrial product (1), which is in blue (B2) and in cylindrical (C) shape, has no filler and is used for injection molding (M), with the melt mass-flow rate (MFR 300/1.2kg) of 8 g/10min (1) and the notched izod impact strength of 63 kJ/m2 (5), is named:
GB/T 40006.1-PC (REC)-B2-C-1, M, 1-5 [simplified name: PC (REC)-B2-C-1]
5.1 General requirements
The main material of recycled PC plastics shall be polycarbonate. There shall be no impurities and oil pollution. It shall be uniform in particle size and has no obvious color difference.
5.1 General requirements
The main material of recycled PC plastics shall be polycarbonate. There shall be no impurities and oil pollution. It shall be uniform in particle size and has no obvious color difference.
5.2 Characterization of the main material
5.2 Characterization of the main material
5.2.1 Infrared spectroscopy
The typical infrared spectrum of polycarbonate is shown in Figure A.1 in Annex A. The spectrum of recycled PC plastics shall have the characteristic absorption peak of polycarbonate in Figure A.1.
5.2.1 Infrared spectroscopy
The typical infrared spectrum of polycarbonate is shown in Figure A.1 in Annex A. The spectrum of recycled PC plastics shall have the characteristic absorption peak of polycarbonate in Figure A.1.
5.2.2 Glass transition temperature
The glass transition temperature (Tg) of recycled PC plastics generally ranges from 136°C to 155°C.
5.2.2 Glass transition temperature
The glass transition temperature (Tg) of recycled PC plastics generally ranges from 136°C to 155°C.
5.3 Odor grade
It shall meet the requirements of 5.3 in GB/T 40006.1-2021.
5.3 Odor grade
It shall meet the requirements of 5.3 in GB/T 40006.1-2021.
5.4 Restricted substance content
5.4 Restricted substance content
5.4.1 Heavy metal
It shall meet the requirements of 5.4 in GB/T 40006.1-2021.
5.4.1 Heavy metal
It shall meet the requirements of 5.4 in GB/T 40006.1-2021.
5.4.2 Polybrominated biphenyls and other organic compounds
The content requirements of polybrominated biphenyls and other organic compounds in recycled PC plastics shall meet the requirements of 5.4 in GB/T 40006.1-2021. See Table 4 for the requirements of total bromine content and total chlorine content.
Table 4 Total bromine content and total chlorine content of recycled PC plastics
Name of restricted substances Unit Premium grade Qualified
Total bromine content mg/kg <=100 >100~1000
Total chlorine content mg/kg <=100 >100~1000
5.4.2 Polybrominated biphenyls and other organic compounds
The content requirements of polybrominated biphenyls and other organic compounds in recycled PC plastics shall meet the requirements of 5.4 in GB/T 40006.1-2021. See Table 4 for the requirements of total bromine content and total chlorine content.
Table 4 Total bromine content and total chlorine content of recycled PC plastics
Name of restricted substances Unit Premium grade Qualified
Total bromine content mg/kg <=100 >100~1000
Total chlorine content mg/kg <=100 >100~1000
5.4.3 Bisphenol A limit
The limit of bisphenol A of recycled PC plastic shall meet the needs of its related application fields.
5.4.3 Bisphenol A limit
The limit of bisphenol A of recycled PC plastic shall meet the needs of its related application fields.
5.5 Radioactive substances
It shall meet the requirements of 5.5 in GB/T 40006.1-2021.
5.5 Radioactive substances
It shall meet the requirements of 5.5 in GB/T 40006.1-2021.
5.6 Appearance and performance requirements
See Table 5 for the properties and performance requirements of recycled PC plastics.
Note: See Annex B for other properties or test items that may be used for recycled PC plastics.
5.6 Appearance and performance requirements
See Table 5 for the properties and performance requirements of recycled PC plastics.
Note: See Annex B for other properties or test items that may be used for recycled PC plastics.
Contents of GB/T 40006.7-2021 Foreword i Introduction ii
9 Packaging, transportation and storage
Annex A (Informative) Typical infrared spectrum of polycarbonate
Annex B (Informative) Other properties of recycled PC plastics Bibliography
Referred in GB/T 40006.7-2021:
GB/T 1033.1-2008 Plastics - Methods for determining the density of non-cellular plastics - Part 1: Immersion method liquid pyknometer method and titration method *
GB/T 1040.1-2018 Plastics—Determination of tensile properties—Part 1:General principles *
GB/T 1040.2-2022 Plastics—Determination of tensile properties—Part 2: Test conditions for moulding and extrusion plastics *
GB/T 1843-2008 Plastics - Determination of izod impact strength *
GB/T 2035-2008 Terms and definitions for plastics *
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 *
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values *
GB/T 9341-2008 Plastics - Determination of flexural properties *
GB/T 9345.1-2008 Plastics - Determination of ash - Part 1: Generalmethods *
GB/T 14190-2017 Testing methods of fiber grade polyester (PET) chip *
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 19466.2-2004 Plastics -Differential scanning calorimetry(DSC) - Part 2:Determination of glass transition temperature *
GB/T 30102-2013 Plastics - Guidelines for the Recovery and Recycling of Plastics Waste *
9 Packaging, transportation and storage
Annex A (Informative) Typical infrared spectrum of polycarbonate
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 1033.1Plastics -- Methods for determining the density of non-cellular plastics -- Part 1: Immersion method, liquid pycnometer method and titration method
- GB/T 1040.1-2018Plastics - Determination of tensile properties - Part 1: General principles
- GB/T 1040.2Plastics – Determination of Tensile Properties – Part 2: Test Conditions for Moulding and Extrusion Plastics
- GB/T 1843-2008Plastics - Determination of izod impact strength
- GB/T 2035Plastics - Vocabulary
- GB/T 2547Plastics — Sampling methods
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Related Standards
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 1040.2-2022 — Plastics – Determination of Tensile Properties – Part 2: Test Conditions for Moulding and Extrusion Plastics
GB/T 14190-2017 — Test methods for fibre grade polyester (PET) chip
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