What is the reason for the formation of bubbles during high-temperature molding of solid silicone gel with platinum vulcanizing agent?
The reason for the formation of bubbles during high-temperature molding of solid silicone gel with platinum vulcanizing agent
The reason for the formation of bubbles in solid silicone gel during high-temperature molding after adding platinum vulcanizing agent may involve multiple factors. Here are some common reasons and their solutions:
1. Excessive moisture content in the material:
Reason: Silicone material absorbs moisture during storage or processing, resulting in the evaporation of moisture and the formation of bubbles during high-temperature molding.
Solution: Ensure that silicone materials are stored in a dry environment and undergo appropriate drying treatment before use.
2. Uneven mixing of vulcanizing agents:
Reason: The uneven mixing of platinum vulcanizing agent and silicone material leads to incomplete local vulcanization reaction and the generation of bubbles.
Solution: Ensure that the vulcanizing agent is thoroughly mixed with the silicone material, using appropriate mixing equipment and processes.
3. Mold design issues:
Reason: Unreasonable mold design resulted in the formation of bubbles during the filling process of silicone material.
Solution: Optimize the mold design to ensure good exhaust and avoid material bubbles during the filling process.
Optimize the uneven mixing of vulcanizing agents, mold design,
4. Injection speed too fast:
Reason: The injection speed is too fast, causing bubbles to form in the silicone material in the mold.
Solution: Adjust the injection speed to ensure that the silicone material is evenly filled into the mold.
5. Improper vulcanization temperature and time:
Reason: Excessive vulcanization temperature or insufficient vulcanization time can cause bubbles to form during the curing process of silicone materials.
Solution: Adjust the vulcanization temperature and time according to the characteristics of silicone material to ensure sufficient vulcanization process.
6. Environmental humidity impact:
Reason: The high humidity in the molding environment causes the silicone material to absorb moisture and produce bubbles during the molding process.
Solution: Control the humidity of the molding environment to ensure a dry environment.
7. Material quality issues:
Reason: There are quality issues with the silicone material itself, such as impurities or impure substances, which can cause bubbles to form during molding.
Solution: Choose a reliable silicone material supplier to ensure material quality.
By comprehensively considering the above factors and taking corresponding measures, it is possible to effectively reduce or avoid the problem of bubbles generated during the high-temperature molding process of solid silicone gel. If you need more specific solutions or technical support, please feel free to contact me at any time.
