#Bismaleimide (BMI) tooling prepregs offer high-temperature performance and durability for composite parts, yet longstanding manufacturing challenges impact cost and lead time.
As David Leach discusses in his latest #CompositesWorld piece, process evaluations show that novel BMI polymer chemistry addresses these issues, enabling an initial cure at 121°C on lower-cost master molds, followed by a 204°C free-standing post-cure.
Key advantages include:
- Reduced risk of vacuum bag failure from off-gassing, as nylon bags withstand exposure below 149°C.
- Comparable tack, drape, and handling to legacy BMI systems, with at least 4 weeks out-time.
- Maintained mechanical properties, toughness, and thermal stability, with less than 1.2% weight loss after 10,000 hours at 177°C.
Evaluations by Janicki and Kaneka North America on demonstration tools confirm durability through 84-137 cycles, with high-quality parts and vacuum integrity.
For details on how this approach streamlines tooling for aerospace and high-growth composite applications, read the full article. https://lnkd.in/gMDXtE_z
source : Composites World
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