Prepregs

Prepregs

Prepregs

Prepreg Materials

Pre-impregnated materials (prepregs) are reinforcement fibres or fabrics into which a pre-catalysed resin system has been impregnated by a machine. The resin systems in these materials react very slowly at room temperature, giving rise to working times of many days or months. Prepreg resins can only be fully cured by heating them to the prescribed cure temperature. The accuracy of the machinery used to combine the fabric or fibre with the resin ensures that laminates produced from prepregs have more consistent and higher fibre contents than can be achieved by wet lay-up techniques. This allows the use of very tough, strong resin systems that would be too high in viscosity to be impregnated by hand.

SPRINT™ Materials

SPRINT™ materials consist of a layer of fibre reinforcement either side of a pre-cast, pre-catalysed resin film with a very lightweight tack film on one face. The material therefore has the appearance of dry reinforcement, which has resin concealed at its centre. SPRINT™ materials are produced by a process that differs from conventional prepreg so that the fibres in the reinforcements remain dry and un-impregnated by the resin. SPRINT™ materials are laid up in a mould and vacuum bagged as for conventional prepreg. However, when the vacuum is applied, the air transport properties of the dry reinforcement enable air trapped in the fibre bundles and between layers to be easily removed. When the temperature is then raised for the cure, the resin film softens and flows into the air-free reinforcement. The void content of the resultant laminate is extremely low (typically 0-0.5%).

Product Selector

Range

Gurit Products 

Main Features

Cure

Recommended Processing Method

Max Tg1

Typical Applications

75

SE 75
SF 75-90
SA 75-90
MP 75-90

  • High performance system
  • Versatile fast curing from 70 to 120°C
  • Optimised handling and out life for large structure manufacture

35 mins at 120°C

12 hrs @ 70°C

  • Vacuum Bagging

125°C

  • Race boats
  • Agricultural booms
  • Super yachts
  • Commercial boat components
  • Production boat components
  • Wind Turbines
  • Radomes

90

ST 90 SPRINT
SF 75-90
SA 75-90
MP 75-90
  • Fast curing system for large industrial composite structures.
  • Available in prepreg and semi-preg formats
  • Optimised for heavy weight glass and carbon reinforcements (300 – 1800gsm)

12 hrs @ 70°C

 45 mins at 120°C

  • Vacuum Bagging

120°C

140

 
  • High performance fast curing systems for press and autoclave applications
  • Flow controlled to produce high quality parts with high cosmetic finish
  • Hot in Hot Out (HiHo) capability without post cure in

Press: HiHo 10 mins at 135°C

Autoclave: 20 mins at 135°C

  • Autoclave
  • Press Moulding
  • Vacuum Bagging

140°C

  • Car body panels
  • Cosmetic parts
  • Structural components
  • Medical prosthetics
180  SE 180  Press: HiHo 5 mins at 150°C 175°C

130FR

SE 130FR
ST 130FR
SF 130FR
  • Non halogen fire retardant system capable of meeting stringent fire standards.
  • Fast curing and optimised with ancillary products to manufacture high quality monolithic and sandwich structures at lowest total manufacturing cost

6 hrs @ 85°C

45 mins at 120°C

  • Autoclave
  • Press Moulding
  • Vacuum Bagging

120°C

  • Rail exterior structures and panels
  • Commercial marine panels
  • Civil engineering structures

 

Gurit SPRINT™ - an advanced prepreg