From Legacy Quad to All-New Double-Double
Traditional Quad laminates—based on [0, ±45, 90] ply angles—have dominated since the 1960s but come with limitations:
- Thousands of stacking sequence permutations.
- Complex mid-plane symmetry to prevent warping.
- Discrete ply angles, restricting precision and flexibility.
Enter Double-Double (DD):
Our groundbreaking approach replaces Quad with [±Φ/±Ψ], offering continuous ply angle variables and simple 4-ply building blocks. NASA Langley and JPL hailed it as “revolutionary,” and studies predict up to 50% weight savings.
Key Benefits of DD
- Unmatched Flexibility:
- DD allows continuous ply angles (e.g., 30°, 31°, or 31.5°), unlike Quad’s rigid increments.
- Covers the entire property field uniformly with precision, eliminating Quad’s 3:1 bias towards hard laminates.
- Simplified Design:
- No need for mid-plane symmetry—stack without restrictions.
- Ply drops can occur on the surface, preserving laminate integrity and reducing defects.
- Cost and Time Efficiency:
- Avoids the complexity of thousands of Quad stacking sequences.
- Reduces testing and design costs by orders of magnitude.
Applications
- Weight Savings:
- Studies confirm 50% weight reduction in tapered composite structures using DD, while maintaining stiffness and strength.
- Optimization and manufacturing are now achievable without the complications of Quad.
- Innovative Products Debuting at JEC World 2025:
- 2.6-meter-wide DD prepreg tape
- Zero longitudinal thermal expansion tubes
- DD moldable prepreg tape
- New DD golf shaft
- Free Design Manual:
A comprehensive guide, complete with supporting data for DD products, will be available to showcase DD’s maturity for industry use.
Experience the Future of Lamination
With DD, the complexities of Quad laminates become a thing of the past. From aerospace to consumer products, this innovation offers unmatched weight savings, simplicity, and scalability.
Let’s shape the future of composites with Double-Double.
👉 Discover More
👉 Download the Free DD Manual
