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GMS Composites EP – 280

Producer:  GMS Composites
GMS Composites EP-280 is a formulated epoxy resin matrix prepreg with long shelf life. The product has a versatile curing cycle from as low as 80°C or as high as 150°C, thus enabling the product to be used to produce a wide range of composite items, from large structures to numerous small components. EP-280 is available in a range of substrates such as carbon, glass or aramid. The product also has good dynamic strength properties as well as outstanding hot-wet resistance. The prepreg has good flow and the tack of EP-280 can be varied.
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Identification & Functionality


Features & Benefits

Materials Features
Product Highlights
  • Variable cure cycle 80°C – 150°C
  • Good surface finish
  • Suitable for a range of structures and processes
  • Excellent shelf life
  • Wide range of fibre substrates available
  • Made in Australia

Applications & Uses


EP-280 can be used to produce structural components with carbon, glass or aramid fibers. It can also be used in the construction of sandwich structures. The versatility of EP-280 means that large complex structures as well as small basic components can be produced. It is possible to utilise EP-280 in a number of industries and applications such as marine, sports and leisure, industrial components, automotive and wind turbine blades.


Cured Properties
ValueUnitsTest Method / Conditions
Flexural Strength at 23°C146 - 156MPaCured neat Formulation Cycle for 10hrs at 90°C
Ultimate Elongation at 23°C6.0 – 7.0%Cured neat Formulation Cycle for 10hrs at 90°C
Flexural Modulus at 23°C3150 - 3400MPaCured neat Formulation Cycle for 10hrs at 90°C
Flexural Strength at 70°C100 - 110MPaCured neat Formulation Cycle for 10hrs at 90°C
Ultimate Elongation at 70°C5.0 – 5.6%Cured neat Formulation Cycle for 10hrs at 90°C
Flexural Modulus at 70°C2500 - 2800MPaCured neat Formulation Cycle for 10hrs at 90°C
Tg (DSC, 10 K/min)102 - 108°CCured neat Formulation Cycle for 10hrs at 90°C
Interlaminar shear strength (12 layers UD e-glass (425gsm) 3.2mm thick laminate )62 - 66MpaCured neat Formulation Cycle for 10hrs at 90°C

Technical Details & Test Data


The versatility of GMS Composites EP-280 means a range of cure cycles, pressures and ramp up rates can be adopted all of which will depend greatly on the part being produced. Below is a guide to cure cycles.

Temperature (°C) Time
80 12 hrs
90 8 hrs
100 4 hrs
110 2 hrs 30mins
120 1 hrs
130 30 min
140 25 mins
150 20 mins
  • Heat ramp up rate – 2°C / min
  • Pressure – 1 bar
Gel Time

Hot plate

Temperature (°C) Time
80 210-240
90 120-160
100 40-60
110 17-25
120 6-10
130 2-5

Values are indicative of small samples of neat resin formulation. Gel times may vary significantly in composites depending on fibre content and laminate thickness.

Storage & Handling


Customers should ensure appropriate workplace OH&S guidelines are followed when working with this product. Appropriate measures should be taken to avoid contact with skin and eyes. Avoid inhalation of dust or fumes that may be released or created when machining, cutting or curing.

Shelf Life

Room temperature (23°C) > 6 weeks
Refrigerated (-18°C) 12 months

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Technical Data Sheet
GMS Composites EP – 280
EP – 280 Technical Data Sheet
Technical Data Sheet
Products: GMS Composites EP – 280
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