GB/T 39714.1-2020 in English
VALIDPlastics—Polytetrafluoroethylene(PTFE) semi-finished products—Part 1:Requirements and designation
- Issued on:2020-12-14
- Implemented on:2021-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$185.00
| Standard No: | GB/T 39714.1-2020 |
| Document status: | VALID |
| Title in English: | Plastics—Polytetrafluoroethylene(PTFE) semi-finished products—Part 1:Requirements and designation |
| Title in Chinese: | 塑料 聚四氟乙烯（PTFE）半成品 第1部分：要求和命名 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-12-14 |
| Implemented on: | 2021-07-01 |
| ICS Classification: | 83.140.01-Rubber and plastics products in general |
| Chinese Classification: | G31-Basic standards and general methods for synthetic resin and plastic |
| Professional Classification: | GB-National Standard |
| Related Keywords: | semi-finished products
recycled resin products implementation suggestions e1-e3 grade products products plastics polytetrafluoroethylene |
| Related Topics: | PTFE
PTFE gb plastic semi-finished product Main component of polyethylene Quartering requirements for samples ene into PTFE standard Quarter plastic tube GB/T 39714.1 GB/T 39714.1-2020 |
《GB/T 39714.1-2020塑料 聚四氟乙烯（PTFE）半成品 第1部分：要求和命名》由TC15（全国塑料标准化技术委员会）归口，TC15SC9（全国塑料标准化技术委员会工程塑料分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
Interpretation of the core content of the standard
This standard applies to semi-finished products of PTFE containing ≤1% comonomer, including new materials, recycled resins and products containing ≤1.5% colorants. According to the tensile properties, it is divided into 4 grades (Grade 1 is the highest), and subdivided into three categories: processing type (P), dimensionally stable type (S) and electrical type (E).
Comparison of key performance indicators
| Performance category | Grade 1 | Grade 2 | Grade 3 | Grade 4 |
|---|---|---|---|---|
| Tensile strength (MPa) | ≥25.0 | ≥20.0 | ≥15.0 | ≥10.0 |
| Fractural strain (%) | ≥280 | ≥200 | ≥150 | ≥75 |
Electrical Strength Grading System
Electrical (E-type) products are divided into 8 levels (E1-E8) according to dielectric strength. Take skimmed film as an example:
- E1 level: ≥100kV/mm (high-end electrical insulation)
- E4 level: 40-60kV/mm (conventional industrial applications)
- E8 level: <10kV/mm (non-critical scenarios)
During the test, the >1mm sample needs to be processed to a thickness of (1±0.1)mm.
Detailed explanation of the naming rules
Use 5-segment coding: shape code + tolerance code + type code + grade + special requirements. For example:
FbS1E7 means: skived plate (b tolerance) / dimensionally stable type (S) / mechanical properties level 1 / electrical strength level E7
Recycled resin should be marked with the suffix REC, such as MbP3REC.
Implementation suggestions
- E1-E3 grade products are preferred for electrical applications
- High ductility materials of level 1-2 are recommended for dynamic sealing scenarios
- Pay special attention to the density range of recycled resin products (2.14-2.23g/cm³)
- Key size parts should choose S type to ensure <0.5% dimensional change rate
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