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1. COMPOSITES TECHNICAL INSIGHTS
Fibres are the primary structural element providing mechanical strength in composite structures. Working together with the resin system, they create lightweight, stiff, and high-performance components.
Today, the most commonly used reinforcement fibres in composite manufacturing are glass fibre, carbon fibre, and aramid-based fibres. Each material offers different advantages depending on mechanical performance, weight, cost, and intended application.
Glass Fibre
Glass fibre is the most widely used reinforcement material in the composites industry. Thanks to its cost efficiency, availability, and balanced mechanical properties, it is used across marine, industrial, and structural applications.
Various weave styles, densities, and application-specific configurations are available.
Carbon Fibre
Carbon fibre is an advanced reinforcement material preferred for applications requiring high stiffness and low weight.
Its exceptional strength-to-weight ratio makes it widely used in racing yachts, aerospace, defense, and other high-performance structural applications.
Carbon composite structures allow lighter, stiffer systems with faster load response characteristics.
Aramid Fibres
Aramid-based fibres are known for their impact resistance and energy absorption capabilities.
They are commonly used in areas where impact performance and structural toughness are critical.
Fibre Selection
Selecting the correct reinforcement depends on application requirements, load conditions, manufacturing method, and cost targets.
Different fibre types can also be combined within hybrid composite structures.
2. RESIN SYSTEMS
Resins are the primary binding system that holds fibre layers together and enables load transfer within composite structures.
The most commonly used resin systems in composite manufacturing are polyester, vinylester, and epoxy.
Polyester Resin
Polyester resins have been widely used in composite manufacturing for many years due to their cost efficiency and ease of application.
Different viscosity options make them suitable for various production methods such as hand lay-up and infusion.
Vinylester Resin
Vinylester resins provide improved mechanical performance and chemical resistance compared to polyester systems.
They offer significant advantages in marine environments, particularly regarding osmotic resistance.
Epoxy Resin
Epoxy systems are among the highest-performance resin solutions used in advanced composites.
Their excellent bonding capability, low shrinkage, and superior mechanical properties make them ideal for high-performance structural applications.
They are widely used in prepreg systems and advanced lamination processes.
Resin Selection
The correct resin system is selected based on mechanical requirements, manufacturing method, operating temperature, cost targets, and service conditions.
3. CORE MATERIALS
Core materials used in sandwich composite structures are designed to increase stiffness while minimizing overall weight.
With proper core selection, lighter, stiffer, and more efficient structures can be achieved.
PVC & PET Foams
PVC and PET foams are among the most commonly used core materials today.
Their different density options allow optimization based on application requirements.
Perforated and grooved versions are available for infusion processes.
Balsa
Balsa is a natural core material known for its low density.
While capable of providing excellent stiffness, its natural characteristics require careful evaluation depending on the application.
Honeycomb Structures
Honeycomb structures are advanced core systems offering high stiffness at very low weight.
They are available in aluminum, plastic, and aramid-based configurations.
Nomex honeycomb systems, in particular, provide high-performance solutions for prepreg applications.
4. LAMINATION METHODS
Lamination is the process of combining fibres and resin systems to create composite structures.
The performance of a composite component depends not only on the materials used, but also on the quality of the lamination process itself.
Hand Lay-Up
Hand lay-up is one of the most traditional composite manufacturing methods.
It is commonly used for simpler applications and cost-sensitive production.
Vacuum Bagging
Vacuum bagging is used to reduce air entrapment and remove excess resin during lamination.
This process enables more controlled and higher-quality laminates.
Infusion
Infusion technology is based on the controlled flow of resin into dry laminate stacks under vacuum.
It provides improved laminate consistency, lower void content, and controlled resin distribution.
Today, it is widely used in large high-quality composite structures.
Prepreg & Autoclave
In prepreg systems, resin is pre-impregnated into the fibre under controlled conditions.
Cured under vacuum and controlled temperature, these systems offer some of the highest laminate quality levels currently achievable.
Autoclave processing further improves consolidation through additional pressure.
5. COMPOSITE QUALITY
High-quality composite manufacturing is achieved not only through material selection, but through complete control of the entire production process.
The key factors defining composite quality include:
- Fibre orientation
- Resin ratio
- Void content
- Consolidation quality
- Curing conditions
- Manufacturing discipline
Void-free and homogeneous laminates result in lighter, stronger, and longer-lasting structures.
In advanced composites, quality depends not only on materials, but also on process control, experience, and attention to detail.