GB/T 1845.2-2021 in English
VALIDPlastics—Polyethylene (PE) moulding and extrusion materials—Part 2:Preparation of test specimens and determination of properties
- Issued on:2021-08-20
- Implemented on:2022-03-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
| Standard No: | GB/T 1845.2-2021 |
| Document status: | VALID |
| Title in English: | Plastics—Polyethylene (PE) moulding and extrusion materials—Part 2:Preparation of test specimens and determination of properties |
| Title in Chinese: | 塑料 聚乙烯（PE）模塑和挤出材料 第2部分：试样制备和性能测定 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2021-08-20 |
| Implemented on: | 2022-03-01 |
| Superseding: |
GB/T 1845.2-2006 Plastics―Polyethylene(PE) moulding and extrusion materials―Part 2: Preparation of test specimens and determination of properties
|
| ICS Classification: | 83.080.20-Thermoplastic materials |
| Professional Classification: | GB-National Standard |
| Related Keywords: | test specimens
electrical strength test sample machine test item density test method specimen preparation key points |
| Related Topics: | gb plastic
Polyethylene sample preparation plastic pe GBT1845.2 GB/T 1845.2-2006 GB/T 1845.2-2021 Polyethylene material chemical performance testing |
《GB/T 1845.2-2021塑料 聚乙烯（PE）模塑和挤出材料 第2部分：试样制备和性能测定》由TC15（全国塑料标准化技术委员会）归口，TC15SC1（全国塑料标准化技术委员会石化塑料树脂产品分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
Core changes in the standard revision
| Technical parameters | 2006 version requirements | 2021 version new regulations | Impact analysis |
|---|---|---|---|
| State adjustment time | 40-96h | 16-96h | Shorten the pretreatment cycle and improve the detection efficiency |
| Relative humidity control | 50%±5% | 50%±10% | Relax environmental control requirements |
| Electrical strength test sample | Not specified | ≥60×≥60×1mm | Specification dimensional consistency |
Key technologies for specimen preparation
Key points for injection molding process control
When the Melt flow rate meter measures MFR≥1g/10min:
- Melt temperature: 210±10℃
- Mold temperature: 40±5℃
- Injection speed: 100±20mm/s
Innovation requirements for performance measurement
Newly added Differential Scanning CalorimeterDetermination of glass transition temperature:
- Test standard: GB/T19466.2
- Heating rate: 10℃/min
- Data acquisition: inflection point of secondary heating curve
Implementation suggestions for international standard differences
Key difference handling solutions
Compared with ISO17855-2:2016:
- Add Brittle temperature testing machine test item (GB/T5470)
- Modify the density test method to GB/T1033 series
- Add clear requirements for sample state adjustment
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 24149.2-2017 in English
Plastics-Polypropylene(PP) compound for automobile-Part 2:Instrument panel
2017-11-01 -
GB/T 40006.5-2021 in English
Plastics—Recycled plastics—Part 5：Acrylonitrile-butadiene-styrene (ABS) materials
2021-10-11 -
GB/T 34691.2-2017 in English
Plastics-Thermoplastic polyester (TP) moulding and extrusion materials- Part 2:Preparation of test specimens and determination of properties
2017-11-01 -
GB/T 22271.1-2021 in English
Plastics—Polyoxymethylene(POM) moulding and extrusion materials—Part 1:Designation system and basis for specification
2021-10-11 -
GB/T 41489-2022 in English
Plastics—Polyamides—Determination of ε-caprolactam and ω-laurolactam by gas chromatography
2022-04-15 -
GB/T 3682.2-2018 in English
Plastics-Determination of the melt mass-flow rate(MFR)and melt volume-flow rate (MVR) of thermoplastics-Part 2:Method for materials sensitive to time-temperature history and/or moisture
2018-10-01
