GB/T 37564-2019 in English
VALIDTest method of creep performance for dipped cords
- Issued on:2019-06-04
- Implemented on:2020-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 37564-2019浸胶帘线蠕变性能试验方法》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC13（全国橡胶与橡胶制品标准化技术委员会浸胶骨架材料分会）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 specifies the creep performance test method of dipped cord under constant load and temperature environment, focusing on monitoring the deformation characteristics of the material under long-term stress. The main technical parameters include:
| Key indicators | Technical requirements | Allowance deviation |
|---|---|---|
| Test temperature range | Room temperature -150℃ | ±1.5℃ |
| Load weight accuracy | - | ±2g |
| Pre-tension | 0.045cN/dtex | ±0.005 |
Technology evolution analysis
Compared with traditional static tensile tests, this standard introduces the time dimension as a key variable to more realistically simulate the conditions in which rubber products such as tires are subjected to continuous stress in actual use. The main technological breakthroughs are:
- Temperature control accuracy is improved to ±1.5℃ to ensure data comparability in high temperature environments
- Clear requirements for the anti-untwisting mechanism to solve the problem of fiber structure changes during long-term testing
- Establish a standardized creep rate calculation formula: C=(L1-L0)/L0×100%
Implementation Suggestions
Case: When a tire company used this standard to test polyester dipped cord, it was found that:
- Under the conditions of 100℃/0.88cN/dtex, the 60-minute creep rate exceeded the industry benchmark by 15%
- The creep rate was reduced to the acceptable range by adjusting the proportion of the RFL bonding system in the dipping formula
It is recommended to focus on the following during implementation:
- Specimen adjustment must meet the (24±2)h equilibrium time
- Non-destructive marking method should be used for measuring section marking
- Comparative test must strictly maintain consistent environmental parameters
Application areas of the standard
This standard is not only applicable to dipped cord, but can also be extended to:
- Development of polyester/nylon skeleton materials for tires
- Durability evaluation of aramid cords for conveyor belts
- Selection of rubber hose reinforcement layer materials
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