Epoxy Prepregs

ST 70

LOW TEMPERATURE EPOXY SPRINT™
  • Award winning SPRINT™ matrix
  • Long out-life at room temperature
  • Zero volatile / solvent content
  • Available with a range of reinforcements
  • Controllable in thick sections
  • Low exothermic properties
  • Excellent laminate quality, low bleed

ST 70 is part of the range of SPRINT™ products. This unique product range provides technically and commercially competitive engineering materials, ideal for use either solely, or in conjunction with other products from within the product range along with other Gurit products.

ST 70 is a hot melt, Diuron free epoxy SPRINT™ ideally suited to the manufacture of thick sections. It can be cured at temperatures as low as 70°C / 160°F, but can also be used for the rapid manufacture of components through its 25-minute cure at 120°C / 250°F. All of this can be achieved together with an out-life of 21 days at 21°C / 70°F.

ST 70 is designed for vacuum bag processing and offers excellent mechanical performance on glass fibre reinforcements. Currently ST 70 is manufactured into a SPRINT™ structure with E-glass and Carbon fibres, which are manufactured into biax or woven materials.

Typical Applications

ST 70 is widely used in sandwich structures with honeycomb, foam and balsa cores, primarily with the toughened SA 70 Adhesive Film.

Essential Product

Readily available to purchase via Gurit's global distributor network click to find a distributor near you.

Technical Data

​SPRINT™ Props.

ST 70 CARBON UNCURED PROPERTIES

SPRINT™ Reinforcement ST70/RC303T/51%/RC303T ST70/RC660T/51%/RC660T
Resin Content (%) 51 51
Fibre Weight (g/m2) 600 1320
Aerial Weight (g/m2) 1200
2640
Product Code SA11-4475
SA11-4477
Resin Weights Available 41-50% 41-50%
Stitch Type/Weave Twill Twill
Fleeced No No
Backer Type 100um MDPE 100um MDPE
Available Roll Length (m) - -
Available Roll Width (mm) 1270 1270
Packing Type Packing type dependent on the length of roll requested

ST 70 GLASS UNCURED PROPERTIES

SPRINT™ Reinforcement WRE581T/42%/WRE581T XE905/S/S
Resin Content (%) 42 43
Fibre Weight (g/m2) 1200 900
Aerial Weight (g/m2) 2068
1785
Product Code SA11-4399
SA21-4396
Resin Weights Available 35-50% 35-50%
Stitch Type/Weave Twill PE Stitch
Fleeced No No
Backer Type 100um MDPE 100um MDPE
Available Roll Length (m) - -
Available Roll Width (mm) 1270 1270
Packing Type Packing type dependent on the length of roll requested
​​Carbon Cured Props.

ST 70 CARBON

SPRINT™ Reinforcement RC303/RC RC660T/RC TEST METHOD
16 hours 70°C 51% 51% -
Tg1 (°C) (Laminate) 85 85 DMA
Tg Peak Tan Delta 104 104 DMA
0° Tensile Strength 835 MPa 835 MPa BS EN ISO 527
0° Tensile Modulus 49.4 GPa 50.34 GPa BS EN ISO 527
0° Tensile Strength Norm. to 60%Vf 1213 MPa 1017.7 MPa BS EN ISO 527
0° Tensile Modulus Norm. to 60%Vf 72 GPa 72 GPa BS EN ISO 527
0° Compressive Strength 478 MPa
519.9 MPa
ISO 14126
0° Compressive Modulus 40.9 GPa 42.4 GPa ISO 14126
0° Comp Strength Norm. to 60%Vf 694.9 MPa 735.9 MPa ISO 14126
0° Comp Modulus Norm. to 60%Vf 59.4 GPa 60 GPa
ISO 14126
ILSS (MPa) 57 MPa 49 MPa BS EN ISO 14130
45° Tensile Strength 127 MPa 155.9 MPa BS EN ISO 527
45° Tensile Modulus 11 GPa 12 GPa BS EN ISO 527
Core Bonding Fracture Toughness Peel (J/m2) P500 core 600 600 GURIT INTERNAL
​Glass Cured Props.

ST 70 GLASS

SPRINT™ Reinforcement WRE581T/42%/WRE581T XE 905/S/S TEST METHOD
16 hours 70°C 42% 43% -
Tg1 (°C) (Laminate) 85 85 DMA
Tg Peak Tan Delta 99 99 DMA
0° Tensile Strength 391 MPa 401.5 MPa BS EN ISO 527
0° Tensile Modulus 21.86 GPa 22.7 GPa BS EN ISO 527
0° Compressive Strength 468.9 MPa

ISO 14126
0° Compressive Modulus 21.1 GPa
ISO 14126
ILSS (MPa) 57.11 MPa 49.4 MPa BS EN ISO 14130
45° Tensile Strength 177.14 MPa
BS EN ISO 527
45° Tensile Modulus 12.2 GPa
BS EN ISO 527
Core Bonding Fracture Toughness Peel (J/m2) P500 core 690 405 GURIT INTERNAL
​Third Party Certs.
CERTIFICATE ISSUER CERTIFICATE
Germanischer Lloyd WP 1330034 HH
Germanischer Lloyd WP 1330033 HH
Germanischer Lloyd WP 1330035 HH
Germanischer Lloyd WP 1330036 HH
​Ancillary Prod.
PRODUCT DESCRIPTION
SF 70 SPRINT™ Toughened Surfacing Film
SA 70 Epoxy Adhesive Film
SP 11100 Monocomponent Paste