Plastics — Recycled plastics — Part 7: Polycarbonate (PC) 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
GB/T 40006.1-2021 Plastics — Recycled plastics — Part 1: General rules
SH/T 1541.1 Plastics — Test method for appearance of granules — Part 1: Visual method
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.
Foreword i
Introduction ii
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
Annex A (Informative) Typical infrared spectrum of polycarbonate
Annex B (Informative) Other properties of recycled PC plastics
Bibliography
Plastics — Recycled plastics — Part 7: Polycarbonate (PC) 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
GB/T 40006.1-2021 Plastics — Recycled plastics — Part 1: General rules
SH/T 1541.1 Plastics — Test method for appearance of granules — Part 1: Visual method
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.
Contents of GB/T 40006.7-2021
Foreword i
Introduction ii
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
Annex A (Informative) Typical infrared spectrum of polycarbonate
Annex B (Informative) Other properties of recycled PC plastics
Bibliography
