1. Key Technical Points of Chemi-Tech's Epoxy Resin Defoaming Technology
In epoxy resin production and processing, foam control requires special attention to the following elements:
1. System Compatibility Control
- Compatibility window between defoamer and resin matrix
- Stability performance in different curing systems (amine/anhydride)
- Evaluation of impact on final product transparency
2. Process Adaptability
- Volatility control during vacuum degassing
- Thermal stability under high-temperature curing conditions
- Dispersion maintenance during high-speed mixing
3. Performance Balance
- Balance between immediate defoaming efficiency and persistent foam suppression
- Control of impact on resin viscosity
- Influence on post-curing surface condition
2. Typical Problem Solutions
Case 1: Bubble Issues in Electronic Encapsulation Resin
An electronic materials manufacturer encountered these problems when using conventional defoamers:
- Defoamer volatilization during vacuum degassing
- Micro-bubbles appearing on cured surfaces
- Device packaging qualification rate dropped to 82%
Improvements made by Chemi-Tech's technical team:
1. Selected higher molecular weight modified polysiloxane system
2. Added special anchoring groups to enhance interfacial bonding
3. Optimized additive amount to 0.3%
Results after improvement:
- 65% reduction in volatilization under vacuum
- Improved surface smoothness after curing
- Product qualification rate recovered to above 98%
Case 2: Resin Process Optimization for Wind Turbine Blades
A composite materials manufacturer encountered these issues during large blade production:
- Bubble accumulation at flow front during resin infusion
- Significant fluctuations in interlayer bonding strength
- Product porosity exceeding standards
The solution included:
2. Adjusted defoamer particle size distribution (D50=8-12μm)
3. Implemented staged addition process (resin pre-mixing + pre-infusion supplement)
Implementation results:
- 80% reduction in flow-front bubbles
- 42% decrease in standard deviation of interlayer shear strength
- Product porosity stabilized below 0.5%
SUPPORTERS OF CHEMICAL TECHNOLOGYDEDICATED TO A BETTER LIFE
