These are the techniques we use.
PFT Profiles focuses mainly on the development and manufacture of half-finished composites.
Composites are, as the word states, materials that comprise at least two different materials. The term advanced composites generally means a composition of two materials of different physical or chemical properties.
The main reason that composite materials are used in more and more applications is their extreme light weight, their exceptional mechanical properties and low maintenance characteristics. In other words, they are strong, light and durable! Pultrusion is a semi-automated, continuous production process for manufacturing fibre-reinforced plastic profiles. The main advantage of this technique is that relatively thin profiles can be manufactured, while maintaining and even increasing the product strength. Additionally, this technique allows for any length profile to be produced.
Pultrusion is based on the principle whereby fibres are first drawn through a resin bath, then through specific preforming systems with various functions. These shape the fibres into the desired form and ensure thorough impregnation of the filament fibre. The resin and fibres are then, in the specified or desired proportions, pulled through a heated die.
During this stage, the resin undergoes polymerisation whereby the fibres are encased in the solidified resin. The profile that emerges from the die is a fully hardened, fibre-reinforced plastic profile. The heart of the process is the “gripper”, that literally pulls the profile through the process: this is the “pul(l)” in pultrusion.
Generally, after the gripper process stage, an automated cutting process follows that cuts the profiles to the desired length. The product is now ready as a half-finished product and can be incorporated into the customers’ product.
The most common fibre orientation runs along the length of the profile. However, we have developed special techniques that make almost any fibre orientation possible.
PFT Profiles uses the following fibres: E-glass fibre, R-Glass fibre, aramid and many types of carbon fibres (STS, UTS, IMS etc.) as well as – in development – natural flax fibre.
Types of resin we use include polyester resins, epoxy vinyl ester resins, epoxy resins and polyurethane resins. Each resin has its specific application and function for our clients.
A customer who processes our product into a broomstick will most certainly be satisfied with an E-glass/polyester with chalk filling and pigment. On the other hand, a customer from the aeronautics industry will settle for nothing less than profiles with UTS/IMS carbon fibre in a complex fibre orientation with an epoxy system that is resistant to high temperatures.
To achieve the desired results, many different types of additives can be included in the production process such as colour pigments, flame retardants, filling materials, etc.