Infusion VS Hand Layup

When discussing composite manufacturing, resin infusion is often presented as the superior alternative to hand layup. The reality is more nuanced. Each process has its strengths, and the right choice depends on the project requirements, production volume, and structural objectives.

Resin Infusion:

✅ Higher fiber content, lower resin consumption, improved laminate consistency, better weight control, and reduced emissions during production.

⚠️ More complex setup, higher tooling requirements, and greater process planning.

Hand Layup:

✅ Lower initial investment, greater flexibility for small runs, a simpler process, and easier implementation for custom parts.

⚠️ Higher resin content, increased laminate weight, greater dependency on operator skill, and less repeatability between parts.

In general, infused laminates achieve higher fiber content and better weight efficiency, while hand layup requires less planning and lower upfront investment but demands more labor during production. Neither process is universally better — the goal is to select the method that best aligns with the vessel's performance targets, production strategy, and budget.

At MIMTec, we support shipyards by developing laminate schedules and structural solutions tailored to the chosen manufacturing process, ensuring performance expectations are met regardless of how the part is built.