cgb QuickPreg: innovative semi-finished products for pressing

QuickPreg is cgb's name for prepregs

cgb QuickPreg is a semi-finished product similar to a prepreg. It is manufactured in a special procedure developed by cgb. The big advantage compared to conventional fabrics is the free-running carbon fibre between two crossing points. This lower ondulation increases the fibre-parallel rigidity by up to 20%. Saturating the rovings according to the cgb method leads to high degree of wetting which finally leads to a significantly lower void content when processed in pressing machinery.

Optimised fibre orientation

cgb can manufacture semi-finished components up to a size of 12 to 16 meters using this method and additionally accomplishes a very short production time for the CFRP-panels. The fibre orientation of the final component is predetermined in the construction phase of the component. A cgb QuickPreg-panel can be composed of an arbitrary number of layers. Even with over 5mm thickness the final panels maintain very good drapability.

Excellent: Fibre volume and quality of laminate

cgb QuickPreg can be used very well when pressing formed components. The panels can be reformed in preheated and cold forms of steel, aluminum and plastics. Even at low locking pressures and without elaborate mechanical presses a fibre volume content of over 60 % and excellent laminate qualities can be achieved. Already available steel presses can still be utilized.

Laser-method for component assemblies

When creating component assemblies cgb glues the individual components with a special method. With a laser the matrix is cracked exposing the carbon fibres. Subsequently the fibres of the components are directly bonded.

Properties and advantages of cgb QuickPreg

• Individually optimized fibre orientation (0-90°) and buildup sequence; fibre orientation is ideally aligned respective of optimized properties of the final component
• Individual choice of fibres specific to the use case
• Specially formulated resin permits manufacturing cycles close to mass production
• Simple (standard-) handling by suitable pre-treatment
• Process-related outstanding impregnation of filaments
• High fibre volume content (approx. 60%), extremely low void content
• Excellent laminate quality
• Very high drapability even at over 5mm thickness of final panels
• Stable fibre-ply even upon strong recasting
• Clipping-free for smooth surfaces due to data-based semi-finished component manufacture
• Present pressing tools can be continued to be utilised
• Short production time of CFRP-Panels
• Semi-finished components up to a size of 12 to 16 meters are possible
• Laser-method for gluing of assemblies
• Conception of prototypes up till series production

Application of cgb QuickPreg

• Aerospace and astronautics engineering
• Ship building
• Automotive and superstructure construction
• Alternative energies (solar power, wind energy)
• Building construction
• Sports equipment
• Stage and exhibition stand construction
• Container construction