The Carbon Black Content Analyzer is designed based on the "Industrial Standards of the People's Republic of China" — specifically, **JTGE-50**, and follows the testing procedures outlined in the **"Carbon Black Content Test (Heat Loss)"** section of the *Testing Procedures for Geosynthetics*. This instrument is used to determine the carbon black content in polyethylene, polypropylene, and polybutylene plastics. The test involves high-temperature decomposition under a nitrogen atmosphere, followed by weight analysis of the remaining residue.
This device offers several advantages, including ease of use, simple operation, reliable performance, accurate measurement, and automatic temperature control. It is ideal for laboratories that require precise and consistent results in material testing.
### Scope of Application
The carbon black content testing device is applicable to **GB/T 2951.41**, which outlines the test methods for insulation and sheathing materials of cables. Specifically, it is used when a low-temperature winding test is required for polyethylene or PVC cables. This standard is equivalent to **IEC 60811-4-1**, ensuring compatibility with international testing protocols.
### Technical Parameters
1. **Tubular heating furnace**: Effective length 400mm, diameter 40mm
2. **Quartz tube**: Inner diameter 30mm, length 500mm
3. **Nitrogen (air) flow**: Adjustable from 0–3L/min
4. **Oxygen (air) flow**: Adjustable from 0–3L/min
5. **Heating furnace temperature range**: 0–1000°C (heated at a standard rate)
6. **Heating furnace power supply**: 220V, 3KW
7. **Test standards**: GB 13021-1991, GB/T 2951.41-2008
### Testing Procedure
1. **Preparation**: Heat the combustion boat to a high temperature, cool it in a desiccator for at least 30 minutes, and weigh it to the nearest 0.0001g. Place a sample of (1.0 ± 0.1)g of polyethylene into the combustion boat, reweigh it, and calculate the sample weight (A) by subtracting the boat’s weight.
2. **Combustion Setup**: Insert the combustion boat into the middle of the quartz tube. Seal one end of the glass combustion tube with a vented rubber plug and adjust the atmosphere system to ensure an oxygen content below 0.5%. Introduce nitrogen at the desired flow rate and maintain it throughout the heating process.
3. **Cooling and Weighing**: After the test, move the combustion boat to the instrument’s mouth without removing it immediately. Allow it to cool slightly in nitrogen, then place it in the desiccator for 20–30 minutes and reweigh it. Subtract the boat’s weight to obtain the residue weight (B).
4. **Final Combustion**: Replace nitrogen with oxygen in the quartz tube and burn the remaining carbon black completely. Cool the boat, reweigh it, and calculate the final residue weight (C).
5. **Result Calculation**:
- **Carbon Black Content** = (B × C) / A × 100%
- **Mineral Filler Content** = C / A × 100%
- **Filler Content** = B / A × 100%
- Where:
- **A** = Sample weight
- **B** = Residue weight after pyrolysis
- **C** = Residue weight after combustion
### User Interface and Operation
1. **Start the System**: Turn on the computer and connect it to the instrument. Click “Yes†to go online. You will be directed to the main interface.
2. **Set Parameters**: Adjust the temperature settings according to the test requirements. Once the set temperature is reached, the system will prompt you. Remove the combustion boat, weigh it, and the test is complete.
This comprehensive and user-friendly system ensures accurate and repeatable results, making it an essential tool for quality control and material testing in the plastics industry.
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