From Lightweighting to Manufacturability: The Trends Shaping Thermoplastic Composites

I've spent my career working across aerospace and defense markets, specifically in manufacturing and materials engineering, including engineering roles at Northrop Grumman, ST Engineering and GE Aviation before joining James Cropper Advanced Materials in late 2025.

Today, as Business Development Manager for Aerospace & Defence, I work closely with OEMs, Tier 1 suppliers and materials specialists to understand how advanced material technologies can support evolving design and manufacturing requirements.

The biggest shift was the focus on industrialisation.

Historically, many thermoplastic discussions centred on proving material performance. This year, the conversation had moved decisively towards production, with significant attention given to automation, manufacturing yield, production rates, supply chain robustness and qualification.

That's important because it signals a more mature market. The industry is moving beyond proving that thermoplastics work and towards solving the practical challenges of deploying them at production scale.

Aerospace manufacturers are under pressure to increase production rates while continuing to reduce weight and cost.

Thermoplastics offer several advantages in that context. Faster processing, improved repairability and the ability to use welding technologies all provide opportunities to simplify manufacturing and assembly.

Thermoplastic welding was a particularly prominent topic at TCC. As aircraft manufacturers pursue higher production rates, reducing part count and assembly complexity becomes increasingly important. Industry demonstrators have shown that replacing mechanically fastened assemblies with welded thermoplastic structures can reduce weight while simplifying production and assembly processes.

Durability remains a major focus, particularly as composite structures are used in increasingly demanding applications.

Delamination continues to be a critical failure mechanism in fiber reinforced composites, affecting long-term durability under fatigue, impact and out-of-plane loading conditions. That's driving greater focus on the interlaminar region and how materials can improve damage tolerance without creating weight or process penalties.

Thermoplastic interleaves are one example. Independent testing of OPTIVEIL® thermoplastic veils has demonstrated improvements in interlaminar fracture toughness of up to 350% in Mode I and 430% in Mode II, with minimal weight addition from just 5gsm. The result is improved resistance to crack initiation and propagation while remaining compatible with established composite manufacturing processes.

What was interesting at TCC was how often performance discussions centred on material architecture rather than simply fibers and resins in isolation.

Aerospace remains one of the most exciting opportunities, particularly in secondary and semi-structural applications where manufacturers are looking to increase production efficiency while maintaining demanding performance requirements.

Advanced Air Mobility is another area generating significant interest. Many programmes are still defining their manufacturing strategies, creating opportunities to implement thermoplastic structures and joining methods from the outset.

Beyond aerospace, we're seeing growing interest from automotive, consumer electronics and sporting goods manufacturers. While the applications differ considerably, the common objective is often the same: achieving lightweight, mechanically efficient structures that can be manufactured at commercial scale.

One of the recurring themes at TCC was material efficiency.

As composite structures become more sophisticated, manufacturers are looking more closely at how reinforcement is distributed throughout a structure. The focus is increasingly on placing reinforcement where it delivers the greatest benefit without adding unnecessary weight or manufacturing complexity.

Our recently launched UNIMAT® product addresses this through a highly aligned discontinuous fiber architecture. By aligning up to 95% of fibers it provides directional reinforcement while remaining compatible with established composite manufacturing processes. The technology can be manufactured in formats ranging from 20–200 g/m² and at industrial scale, with production capability exceeding 2 million m² annually.

Applications such as secondary aerospace structures, thermoplastic welded assemblies, advanced air mobility structures and other semi-structural components are particularly interesting because they require a balance of mechanical performance, formability and production efficiency. These are exactly the types of challenges that aligned discontinuous fiber technologies are designed to address.

Materials that enable simpler manufacturing and more efficient structures.

The industry has largely moved beyond proving the capabilities of thermoplastics. The next challenge is implementation, how manufacturers integrate these materials into production environments while meeting performance, certification and cost requirements.

That's why discussions around automation, thermoplastic welding, fracture toughness and reinforcement architecture featured so heavily at TCC. The next phase of innovation will come from combining material performance with manufacturing practicality.

The future will be defined by how effectively materials, processes and manufacturing strategies work together to enable the next generation of composite structures instead of focusing on a single break through material.