GB/T 39295-2020 in English
VALIDDetermination of the tack for water based adhesive
- Issued on:2020-11-19
- Implemented on:2021-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
《GB/T 39295-2020水性胶粘剂触粘性的测定》由TC185（全国胶粘剂标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
Introduction
Analysis of the core content of the standard
| Technical elements | GB/T39295-2020 requirements | Conventional methods in the industry |
|---|---|---|
| Test principle | Maximum value of light force short-time contact separation force | Constant pressure continuous bonding |
| Fixture accuracy | ±1g quality error | ±5g common |
| Contact pressure | 2N standard pressure | 1-5N varies |
Key test equipment specifications
The standard requires the use of a tactile adhesion tester, and its core parameters include:
- Range 0-100N, Force error ≤1%
- Separation speed (100±10)mm/min
- Total mass of upper fixture (200±1)g
Key points of sample preparation
Take water-based polyurethane adhesive for shoes as an example:
- Use PU leather/PU leather combination substrate
- Coating thickness ≤2.0mm
- Adjust at (23±2)℃ for 24h
Technology evolution background
This standard fills the gap in the quantitative evaluation of the instantaneous bonding performance of water-based adhesives. Compared with GB/T30779-2014, it focuses more on the adhesive characteristics during the operation window period. The drafting units include institutions in multiple fields such as footwear, chemical industry, and testing to ensure the practicality of the method.
Implementation Suggestions
| Operational Steps | Precautions |
|---|---|
| Sample Installation | It is strictly forbidden to touch the rubber surface for measurement |
| Data Processing | Remove extreme values and take the average of 3 times |
| Environmental Control | Strictly maintain 50±10%RH |
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