Epoxy Prepregs

WE 91

HIGH & MEDIUM TACK EPOXY PREPREG
  • WE 91-1 high tack resin matrix
  • WE 91-2 medium tack resin matrix
  • 60 day out-life at 21°C / 70°F
  • High flow matrix
  • Cure from 85°C to 120°C / 185°F to 250°F

WE 91 is part of Gurit’s comprehensive offering of structural composite product solutions comprising of three main product groups; Prepreg, SPRINT™ and SparPreg™. This unique product range provides technically and commercially competitive engineering materials, ideal for use either solely, or in conjunction with other Gurit products from within the range.

Gurit’s WE 91 prepreg product range comprises of two tack variants; WE 91-1 high tack and WE 91-2 medium tack prepregs.

WE 91 is a high flow epoxy prepreg ideally suited to structural composite component manufacture. It can be cured at temperatures as low as 85°C / 185°F, but can also be used for the rapid manufacture of components through its 45-minute cure at 120°C / 250°F. All of this can be achieved together with an out-life of 60 days at 21°C / 70°F. WE 91-2 is designed for vacuum bag processing and offers excellent mechanical performance on glass and carbon fibre reinforcements.

Typical Applications

Gurit’s WE 91 product range uses a high flow, low tack epoxy prepreg ideally suited to the manufacture of thick sections such as turbine blade roots or spars.

ESSENTIAL PRODUCT

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

Technical Data

​Cure Temp/Time

WE 91-1 offers flexible curing options. The recommended minimum cure is 720 minutes at 80°C (176°F) with a 1°C (1.8°F) per minute ramp-rate

PROPERTY OVEN / VAC BAG TEST STANDARD
Typical Laminate 4 plies of WE 91-1 XE600 (biax) prepreg with 35% resin content
Typical Ramp Time 1–2°C (2–4°F) per minute
-
Cure Temperature 85°C (185°F)
120°C (248°F) -
Cure Dwell Time 600 (min)
90 (min) -
Cure Pressure -1bar (14.5Psi) -
De-mould Temperature < 60°C (140°F)
-
Dry Tg1 (DMA) 110 - 125°C / 230 - 257°F
ASTM D2078

WE 91-2 offers flexible curing options. The recommended minimum cure is 720 minutes at 80°C (176°F) with a 1°C (1.8°F) per minute ramp-rate

PROPERTY OVEN / VAC BAG TEST STANDARD
Typical Laminate 4 plies of WE 91-2 XE600 (biax) prepreg with 35% resin content
Typical Ramp Time 1–2°C (2–4°F) per minute
-
Cure Temperature 85°C (185°F)
120°C (248°F) -
Cure Dwell Time 600 (min)
90 (min) -
Cure Pressure -1bar (14.5Psi) -
De-mould Temperature < 60°C (140°F)
-
Dry Tg1 (DMA) 110 - 125°C / 230 - 257°F
ASTM D2078
​​Resin Prop

WE 91-1
4mm resin cast oven cured using standard processing techniques and cured at 120°C (175°F) for 90 minutes

PROPERTY 90 MINUTES @ 120°C (175°F) TEST STANDARD
Tensile Strength 76 MPa 11 Ksi ISO 527-2
Tensile Modulus 3.0 GPa 0.44 Msi ISO 527-2
Flexural Strength 119 MPa 17 Ksi ISO 178
Flexural Modulus 4.0 GPa 0.58 Msi ISO 178
Compressive Strength 143 MPa 21 Ksi ISO 604

WE91-2
4mm resin cast oven cured using standard processing techniques and cured at 120°C (175°F) for 90 minutes

PROPERTY 90 MINUTES @ 120°C (175°F) TEST STANDARD
Tensile Strength 88 MPa 12.8 Ksi ISO 527-2
Tensile Modulus 3.3 GPa 0.48 Msi ISO 527-2
Compressive Strength 118 MPa 17 Ksi ISO 604
Compressive Modulus 3.9 GPa 0.57 Msi ISO 604
​91-1 Cured Lam

WE 91-1

Cured using standard processing techniques and a minimum cure time of 90 minutes at 120°C (250°F)

PROPERTY XE600
UC1600 TEST STANDARD
Fabric / Fibre Description 600g/m2 Stitched Biaxial using E-glass 1600g/m2 Unidirectional E-glass -
Resin Content 35%
32% -
Cure Method Vacuum bag cured at -1bar
-
Cure Schedule 90 minutes at 120°C (250°F) -
Glass Transition Temperature (DMA) 110-125°C 230-257°F 110-125°C 230-257°F ISO 6721
Cured Ply Thickness 0.45mm 0.018in 1.22mm 0.048in ASTM D 3171
0° Tensile Cured Fibre Volume 51.5% 51.2% ASTM D 3171
0° Tensile Strength 544 MPa 79 Ksi 1028 MPa 40 Ksi ISO 527-4
0° Tensile Modulus 30 GPa 4.4 Msi 47 GPa 1.9 Msi ISO 527-4
+/-45° Comp Str Fibre Volume 50.0% - ASTM D 3171
+/-45° Compressive Strength 151 MPa 22 Ksi - - SACMA SRM1-94
+/-45° Compressive Modulus Fibre Volume 51.2% - ASTM D 3171
+/-45° Compressive Modulus 13 GPa 1.84 Msi - - SACMA SRM1-94
90° Tensile Fibre Volume - 48.9% ASTM D 3171
90° Tensile Strength - - 35 MPa 1.4 Ksi ISO 527-4
90° Tensile Modulus - - 9.3 GPa 0.37 Msi ISO 527-4
+/-45° IPS Fibre Volume - 49.8%
+/-45° In-Plane Shear Strength - - 48 Mpa 1.9 Ksi ISO 14129
+/-45° In-Plane Shear Modulus - 4.4 GPa 0.17 Msi ISO 14129
+/-45° In-Plane Shear Posissons Ratio - 0.60
0° ILSS Fibre Volume 45.4% - ASTM D 3171
0° ILSS 41 MPa 1.6 Ksi - - ISO 14130
+/-45° ILSS Fibre Volume - 38.0% ASTM D 3171
+/-45° ILSS - - 35 MPa 5.1 Ksi ISO 14130
​91-2 Cured Lam

WE 91-2

Cured using standard processing techniques and a minimum cure time of 90 minutes at 120°C (250°F)

PROPERTY YE1200/TEA50
XE600 / TEA50 TEST STANDARD
Fabric / Fibre Description 1200g/m2 Stitched Triaxial using E-glass with a 50g/m2 glass fleece 600g/m2 Stitched Biaxial using E-glass with a 50g/m2 glass fleece -
Resin Content 43%
43% -
Cure Method Vacuum bag cured at -1bar
-
Cure Schedule 90 minutes at 120°C (250°F) -
Glass Transition Temperature (DMA) 110-125°C 230-257°F 110-125°C 230-257°F ISO 6721
Cured Ply Thickness 1.01mm 0.040in 0.61mm 0.024in ASTM D 3171
0° Tensile Cured Fibre Volume 45.2% - ASTM D 3171
0° Tensile Strength 656 MPa 26 Ksi - - ISO 527-4
0° Tensile Modulus 24 GPa 0.93 Msi - - ISO 527-4
0° Comp Str Fibre Volume 44.5% - ASTM D 3171
0° Compressive Strength 537 MPa 21 Ksi - - SACMA SRM1-94
0° Compressive Modulus Fibre Volume 46.4% - ASTM D 3171
0° Compressive Modulus 31 GPa 1.2 Msi - - SACMA SRM1-94
+/-45° Tensile Cured Fibre Volume - 39.3% ASTM D 3171
+/-45° Tensile Strength - - 144 MPa 21 Ksi ISO 527-4
+/-45° Tensile Modulus - - 11.9 GPa 1.7 Msi ISO 527-4
+/-45° Compressive Str. Fibre Volume - 36.4% ASTM D 3171
+/-45° Compressive Strength - - 167 MPa 24 Ksi SACMA SRM1-94
+/45° Compressive Mod. Fibre Volume - 35.8% ASTM D 3171
+/-45° Compressive Modulus - - 10.5 GPa 1.52 Msi SACMA SRM1-94
0° ILSS Fibre Volume 45.4% - ASTM D 3171
0° ILSS 41 MPa 1.6 Ksi - - ISO 14130
+/-45° ILSS Fibre Volume - 38.0% ASTM D 3171
+/-45° ILSS - - 35 MPa 5.1 Ksi ISO 14130
​3rd Party Cert

WE 91-1

CERTIFICATE ISSUER CERTIFICATE
Germanischer Lloyd WP 1230025 HH
​Ancillaries
PRODUCT DESCRIPTION
SF 80 SPRINT™ Toughened Surfacing Film
SA 80 Epoxy Adhesive Film
SP 9435 Mono-Component Epoxy System