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GMS Composites EP – 620

Producer:  GMS Composites
GMS Composites EP-620 prepreg is a special epoxy resin matrix system with long shelf life and high elongation. EP-620 is designed for composite applications requiring high energy absorption and impact resistance. 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-620 is available in a range of substrates such as carbon, aramid, s-glass, polyethylene or e-glass. The prepreg has good flow and the tack of EP-620 can be varied.
Product Resources

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Identification & Functionality

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Features & Benefits

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Product Highlights
  • Variable cure cycle 80°C – 150°C
  • Very high impact resistance
  • Suitable for a range of components and processes
  • Excellent shelf life
  • Wide range of fibre substrates available
  • Made in Australia

Applications & Uses

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Applications

When combined with fibres such as carbon, aramid, s-glass or polyethylene, EP-620 can be used to produce items requiring energy absorption and impact resistance such as ballistics components, automotive and motorsport products, marine components subject to impact, etc. These products have applications in industries such as defence, military, personal protection, vehicle protection, infrastructure shielding, motorsport, transport and marine. The versatility of EP-620 means that large complex structure as well as small basic components can be produced.

Properties

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Compatible Polymers & Resins
Cured Properties
ValueUnitsTest Method / Conditions
Flexural Strength105 - 115MPaCured neat Formulation Cycle for 1hrs at 120°C
Elongation at flexural strength5.2 – 5.7%Cured neat Formulation Cycle for 1hrs at 120°C
Ultimate Strength80 - 90MPaCured neat Formulation Cycle for 1hrs at 120°C
Ultimate Elongation10.5 – 11.5%Cured neat Formulation Cycle for 1hrs at 120°C
Flexural Modulus2850 – 3050MPaCured neat Formulation Cycle for 1hrs at 120°C
Tg (DSC, 10 K/min)65 - 70°CCured neat Formulation Cycle for 1hrs at 120°C
Fracture Toughness K1C2.20 – 2.35MPaÖmCured neat Formulation Cycle for 1hrs at 120°C
Fracture Energy G1C1400 - 1550J/m2Cured neat Formulation Cycle for 1hrs at 120°C
Tensile Strength60 – 70MPaCured neat Formulation Cycle for 1hrs at 120°C
Elongation at tensile strength3.0 – 4.0%Cured neat Formulation Cycle for 1hrs at 120°C
Ultimate Strength (tensile)50 - 60MPaCured neat Formulation Cycle for 1hrs at 120°C
Ultimate Elongation (tensile)8.5 – 10.0%Cured neat Formulation Cycle for 1hrs at 120°C
tensile Modulus2900 - 3100MPaCured neat Formulation Cycle for 1hrs at 120°C

Technical Details & Test Data

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Curing

The versatility of GMS Composites EP-620 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
90 100-160
100 35-45
110 22-30
120 10-15
140 3-6

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

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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

Most Viewed Documents

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Products
Document Name
Learn More
Technical Data Sheet
GMS Composites EP – 620
EP – 620 Technical Data Sheet
Technical Data Sheet
Products: GMS Composites EP – 620
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