GB/T 2567-2021 in English
VALIDTest methods for properties of resin casting body
- Issued on:2021-08-20
- Implemented on:2022-03-01
- File Format:PDF
- Delivery:Via email within 5 business days
$301.00
《GB/T 2567-2021树脂浇铸体性能试验方法》由TC39（全国纤维增强塑料标准化技术委员会）归口，主管部门为中国建筑材料联合会。
Introduction
Core changes in standards and technological innovations
| Technical dimension | 2008 version regulations | 2021 version updates | Technical impact |
|---|---|---|---|
| Specimen processing | Mechanical cutting + grinding is allowed | Prioritize the use of CNC machining equipment for one-time molding | Reduce human errors and improve data consistency |
| Dimensional accuracy | Tensile specimen ≥200mm | Strictly limit the range of 200-220mm | Eliminate the influence of dimensional deviation on the results |
| Moduli calculation | Manual calculation method only | New calculation formula for automatic recording device | Adapt to the trend of digital testing |
| Equipment requirements | Testing machine needs to be calibrated regularly | Delete the mandatory calibration clause | Link with current metrology regulations |
Key points for implementing key test methods
1. Specimen preparation specifications
The new standard emphasizes the standardized production process of U-shaped mold frame in conjunction with the glass/steel plate template, and requires uniform application of the release agent. The curing process is divided into:
- Room temperature curing: 24-48h demoulding and then need to be placed for more than 504h
- Post-curing: 24h at room temperature and then temperature rise
- Heat curing: controlled by the parameters of the resin supplier
2. Innovation in mechanical properties testing
Typical application of tensile test
The test of an epoxy resin casting showed that the elastic modulus measured by the automatic recording device reduced the deviation by 42% compared with the manual calculation, verifying the reliability of formula (3):
Et = (σ0.0025 - σ0.0005) / (0.0025 - 0.0005)
Recommendations for the implementation of the standard
Laboratory construction requirements
- Environmental control: strictly maintain (23±2)℃, (50±10)%RH
- Equipment selection: 0.0001g precision balance is recommended, and the load error of the testing machine is ≤±1%
- Staff training: focus on mastering the operation of CNC processing equipment and automatic data collection
Quality control nodes
| Detection stage | Control indicators | Acceptance criteria |
|---|---|---|
| Specimen processing | Surface defects | No dense bubbles/cracks (5.1.4.5) |
| State adjustment | Putting time | ≥24h (5.3.1) |
| Data validity | Coefficient of dispersion | Impact test <5% (6.4.2.2) |
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