Perseus Materials is developing a continuous composite manufacturing system that combines continuous fiber reinforcement with adaptable geometries and self-propagating chemistry. The technology is designed to manufacture large structural components without the massive ovens, molds, tooling, and autoclaves traditionally required for composite production. Pulse 2.0 interviewed Perseus Materials Co-Founder and CEO Daniel Lee to learn more.
Daniel Lee’s Background
When asked about his background and the research that became the foundation of Perseus Materials’ technology, Lee shared:
I did my postdoctoral work at Stanford. Both my advisers studied under Bob Grubbs, who won the 2005 Nobel Prize for catalysis research that became the foundation of our technology. We were developing strong, recyclable resins. During that research, we noticed our chemistry moved heat in completely unexpected ways.
How Perseus Materials Started
When discussing how the idea for Perseus Materials came together, Lee explained:
Perseus came out of research I was doing at Stanford with my original Co-Founder, John Feist, who was a Ph.D. student at the time. We published a paper together in Nature Chemistry on creating strong polymers that could also break down for recyclability. We thought we’d use this chemistry in composites, particularly for wind turbine blades, where recyclability seemed most valuable.
But as we learned more about composite manufacturing and 3D printing, we realized our chemistry solved much bigger problems than recyclability. The way our resin moves heat was completely different from conventional approaches. Most composite manufacturers try to avoid the kind of exothermic behavior our chemistry creates, but we realized we could lean into it.
That opened up possibilities for eliminating massive ovens, reducing tooling costs, and manufacturing at speeds that weren’t previously possible. We spun out the company about two years ago and pivoted from the recyclability value proposition to focus on large-scale, high-throughput manufacturing.
Building A Boat
When asked about his favorite memory from working at Perseus Materials, Lee reflected:
We successfully built a boat using our proprietary composite manufacturing technology and validated our assembly methods in real-world conditions. It tested our team in ways we hadn’t faced before: coordination across disciplines, grit when things didn’t go as planned, and execution under pressure. We crushed all three. Watching the team come together and pull that off is when I knew we had something special.
Core Products And Technology
When describing Perseus Materials’ core products and features, Lee detailed:
Perseus is building a continuous composite manufacturing system that blurs the line between pultrusion and 3D printing. Think of it as getting the quality and fiber volume fractions of pultrusion with continuous fiber reinforcement, but with the ability to change the cross-section of the part as it comes out.
The core technology is based on self-propagating chemistry. Traditional composite manufacturing depends on machines to supply heat and energy through ovens or heated tools. We embed the energy into the material itself through a polymerization reaction that creates so much heat that it excites neighboring resin molecules, creating a self-propagating cure. This happens in what we call an adaptable die. We’ve taken the concept of a pultrusion die and made it flexible and actuatable, so it can change shape as the part is being pulled through.
This lets us manufacture very large composite structures without the machine needing to be larger than the part. We’re talking about parts 60 to 130 meters long for wind turbine applications. We can apply autoclave-level pressures of 90 to 120 PSI out in the open air using mechanical actuators, and we can pull thick laminates at around 30 centimeters per minute while the cure propagates through the material.
For companies building large composite structures, we’re changing lead times from months to days and eliminating the massive capital investment in molds and autoclaves. You get the structural performance you need without the tooling costs that make traditional composite manufacturing prohibitively expensive at scale.
Ensuring Process Repeatability
When asked about challenges facing Perseus Materials and the wider additive manufacturing sector, Lee acknowledged:
The biggest challenge is repeatability. When you’re 3D printing 30 small parts and one fails, you still have 29 that work. Perseus is making large contiguous parts. If we have an irreparable defect at meter 99 out of 100, we have to throw away the entire part. So, our process has to be extremely reliable.
This puts a much higher burden on process control than traditional 3D printing. We’re building digital twins to monitor process parameters continuously, tracking everything that could introduce variability.
Technology Evolution
When discussing how Perseus Materials’ technology has evolved since launching, Lee described:
Perseus began by focusing on recyclability for wind turbine blades, but we quickly realized the composite manufacturing challenges went far beyond recyclability. Wind blades need to be extremely inexpensive, around $10 per kilogram versus $100 per kilogram in aerospace, which creates completely different constraints around automation, labor, and material costs.
As we developed the technology, we realized the same fundamental approach of controlling how heat moves through materials could be adapted to multiple composite manufacturing processes. We’ll then apply the learnings to filament winding, where we can change the diameter as we go or add elbows into parts. We also developed a version using chopped fibers as a form of shape-changing extrusion.
The chemistry itself has evolved from purely focusing on recyclability to optimizing for this self-propagating cure behavior and the very specific control we need over how the reaction front moves through space and time.
Major Company Milestones
When asked about Perseus Materials’ most significant milestones, Lee highlighted:
The recent Lockheed Martin and Roadrunner Venture Studios investments show the demand for large-scale manufacturing that is quick and affordable. Lockheed Martin is particularly interested in how we can accelerate design and prototyping while eliminating tooling costs entirely.
Customer Pilots
When invited to discuss specific customer projects, Lee revealed:
We are focused on an initial pilot with a major wind turbine manufacturer involving structural components. The initial phase is for a smaller component under 20 feet for material validation.
We are also exploring defense applications with our close partners.
Funding And Expansion
When asked about Perseus Materials’ funding and how the capital will support its growth, Lee reported:
We’ve raised funding from private capital with federal and state government support. The recent investments from Lockheed Martin and Roadrunner Venture Studios will enable Perseus to expand our team, fulfill our first customer orders, and grow our physical footprint.
Market Opportunity
When discussing the total addressable market Perseus Materials is pursuing, Lee outlined:
We’re going after large structural components across multiple industries, including wind energy, shipbuilding, marine defense, and aerospace. These are markets where parts are getting bigger every year and traditional manufacturing can’t keep up.
There are, of course, differences across industries that manifest in customer acquisition costs. In addition to traditional customer acquisition costs like samples, demonstrations, and lead generation, there are technical development and materials validation costs and timelines, which can be much greater and more difficult. So, instead of trying to sell different products to the same customer profile, we are focused on selling the “same” product to different customers.
No two customers will ask for the same part, but the closest we can get to minimizing these technology and materials validation costs is to offer geometric variations of a common structural shape. The one we’re focused on is the I-beam. The I-beam, including S-, W-, and H-beams, as well as its many analogues, exists in every structural part across every industry. The I-beam is a mass-efficient way of resisting bending loads. In construction, they’re called I-beams. For airfoils, we call them spars. If you use a portion of one to stiffen a skin, we call it a stringer.
But topologically, and for load-bearing purposes, these are all similar. By focusing our resources on solving these challenges and offering customers enough variation for their needs, we can minimize the cost of customer adoption and material validation.
What is the total addressable market for making something strong enough to be useful for infrastructure? This isn’t about making one industry better. We think in terms of part families. If you can solve the manufacturing challenge for one of these part types, you unlock applications across wind, marine, defense, and aerospace simultaneously.
There are customer acquisition costs to crossing industries on the business side, but if you’re making essentially the same part topology for different applications, you’re trading off some of those business costs with reduced technical and qualification costs. A 60-meter wind blade shell and a ship hull are fundamentally similar manufacturing challenges.
Perseus Materials’ Differentiators
When asked what differentiates Perseus Materials from its competition, Lee emphasized:
Three things fundamentally differentiate us.
First, the chemistry. We’re using ROMP-based resins that exhibit self-propagating high-temperature synthesis behavior. The resin generates the heat for curing, so the machine doesn’t have to supply it. It’s a complete rethinking of where energy comes from in the manufacturing process.
Perseus is also not constrained by part size the way traditional composite manufacturing is. Your tool doesn’t have to be larger than your part because we’re pulling it continuously through an adaptable die. Whether you’re making a 15-meter part or a 130-meter part, the machine is the same size.
Finally, Perseus is achieving autoclave-level consolidation pressures of 90 to 120 PSI out in the open air through mechanical actuation. We’re getting molding quality without the massive capital expense of autoclaves or huge heated tools.
The real differentiation is that Perseus is not trying to make 3D printing a little better. Doubling production by doubling capital expenditures isn’t real scalability. We’re going after the fundamental constraints and eliminating them through chemistry and process changes.
Future Goals
When discussing Perseus Materials’ future goals, Lee noted:
Perseus is exploring defense-relevant applications more deeply, such as composite structures for maritime platforms and potentially aerospace applications. We want to develop variations of our core process for different geometries, including filament winding with variable diameters and different approaches to airfoil components and structural elements.
Long term, the vision is much bigger. We’re entering an era where economics and national security require us to move away from exquisite custom parts toward higher production volumes with predictable quality. But standardized parts don’t work functionally in most industries. We want to give designers the value of standardized parts with just enough customizability that they can make what they need.
We want to make designing and using composites so convenient that they become the default building material. If we can make it easier to build enormous structures using composites, we can reshape infrastructure, defense platforms, and renewable energy. This is how America builds at scale.
Digital-To-Physical Manufacturing
When invited to discuss the broader mission behind Perseus Materials’ technology, Lee concluded:
The other thing I’d highlight is that while Perseus uses continuous fiber reinforcement and our process looks like molding in many ways, we maintain the digital-to-physical transformation that makes 3D printing valuable. We program the shape, we have a digital file, and we can change designs without retooling. We’re trying to bring design for manufacturability back to the forefront, giving engineers a building block they can rely on to create their skeleton and then fill everything else in around it.
This is about making it easier to build the enormous structures that drive renewable energy, national defense, and infrastructure. And if we can do that while making American manufacturing more competitive globally, that’s the mission.
