General Datasheet
SE75-08-0422 1
SE 75
High Performance Prepreg System
New generation, hot melt, epoxy prepreg
Builds on the established heritage and performance of SE84LV, with more
versatile cure possibilities
12 hours at 70 C (158 F)
6 hours at 80 C (176 F)
35 minutes at 120 C (248 F)
Exceptional mechanical and thermal performance
8 weeks shelf life at 18-22 C (73 F)
Optimised for large structure vacuum bag processing
Suitable for a wide range of Marine and Industrial applications
Specifically formulated for large open mould vacuum processes
Lloyd s Register Certified Formats Available
INTRODUCTION
SE 75 is an extremely versatile hot melt epoxy prepreg system. It builds on the established good handling and performance of SE
84LV but has more versatile cure possibilities from 12 hours at 70 C (158 F) to 45 minutes at 120 C (248 F), whilst maintaining
an 8 week shelf life at 18-22 C. This flexibility combined with its exceptional mechanical and thermal performance makes it suitable
for a wide range of marine and industrial applications.
TYPICAL END USE APPLICATIONS
SE 75 can be used for any high-performance structure. Its long shelf life at 18-22 C means it is particularly suited to large
components that need to remain in mould for long durations prior to curing.
SE75-08-0422 2
INSTRUCTIONS FOR USE
PREPARATION
When preparing the lay-up the prepreg should be removed from
the freezer and allowed to thaw in a sealed bag. This may take 6
to 24 hours depending on roll size. This prevents atmospheric
moisture from condensing on the prepreg which may cause
voiding on cure. The mould surface should be release coated and
must have been tested for vacuum integrity prior to lay-up.
LAYING-UP
The following procedure is recommended for preparing out of
autoclave vacuum cured laminates.
1. Place the lay-up on a tool which has been treated with a high
temperature release agent or film. Insert a thermocouple into the
lay-up near the centre ply of the thickest edge section, outside the
net trim line.
2. Apply a peel ply to the surface of the lay-up if required, a heat
scoured nylon peel ply is strongly recommended. For thin
laminates a prepreg peel ply should be considered to prevent over
bleed of resin. Cover the peel ply entirely with a low bleed
perforated release film. Typically a minimum of 150g/m breather
fabric should be used to control the resin bleed and air flow.
3. Install a vacuum bag. Position part in the oven or autoclave and
draw vacuum to check for bag or system leaks.
4. It is not recommended to cure SE 75 under vacuum pressures
of less than 85%.
5. Cure as described in the following section
6. Upon completion of cure, turn off heat and cool until part
temperature has fallen below 60 C (140 F). When fully cooled,
the part may be debagged, trimmed and machined as necessary.
A post-cure is not required.
CORE BONDING
This product can be used in conjunction with typical core
materials. Representative test panels should be made to ensure
that the laminate construction, curing method and other variables
allow full filling of any cuts or slits in the foam. The cure cycles
given in this datasheet are for typical monolithic flat panels and
may not be appropriate for sandwich panels.
When using Nomex or aluminium honeycombs, the separate
SA75-90 adhesive film is recommended and full details of use are
provided on the product data sheet. This adhesive film can be
supplied with or without lightweight glass carrier, or in some cases
it can be supplied directly coated onto one face of the SE 75
prepreg.
The system is fully compatible with Ampreg wet layup epoxy
systems and therefore all types of cores may be bonded to a first
skin by using a separate wet-bonding operation. In this case, the
addition of filler powders to the appropriate resin system is
required to provide the correct paste-like consistency.
THIN LAMINATES
When using very thin laminates (e.g. with a total laminate fibre
weight of less than 300-400gm
2
), care needs to be taken to avoid
extracting excessive amounts of resin during the cure process. To
avoid this, a microporous release film can be used, and for
particularly critical components, a prepreg peel ply should be used.
CURE CYCLE
Commence the heat-up cycle, between 0.3 C (0.5 F)/min and 2 C
(3.6 F)/min to the final cure temperature. At 70 C (158 F), the
temperature should be held for 12 hours. Faster cures are obtained
at elevated temperatures, e.g. 6 hours at 80 C (176 F), 45 minutes
at 120 C (248 F). All temperatures measured by thermocouple
installed on the laminate surface. Vacuum should be maintained as
high as possible throughout the cure cycle.
If a ramp rate of less than 0.3 C/min (0.5 F/min) is used, users
should satisfy themselves that this allows adequate resin flow.
CURING AT 70 C (158 F)
When curing at 70 C (158 F) it is important to ensure the
temperature is monitored from the lowest thermocouple reading in
the laminate. 70 C (158 F) should be treated as the minimum cure
temperature for SE75; 65-70 C (149-158 F) will not generate
adequate mechanical properties.
SE75-08-0422 3
PRODUCT INFORMATION
AVAILABILITY
SE 75 is available in unidirectional carbon formats ranging in
weight from 120 to 600g/m
2
, also woven or multiaxial
reinforcements in carbon or glass from 100-1200g/m
2
. The
product formats listed to the right also benefit from 3
rd
Party
Certification.
COMPATIBLE ADHESIVE FILMS
SA75-90 adhesive film has been developed specifically for this
prepreg system. This can be supplied with or without a supporting
medium in 150g to 400g film weights.
PRODUCT DESCRIPTION STATUS CERTIFICATION
SE 75 HMC UD Prepreg
150 – 600g/m
2
Valid
Lloyds Register
LR21106133ALP-01
SE 75 HEC UD Prepreg
150 – 600g/m
2
Valid
Lloyds Register
LR21106188ALP
SE 75 IMC UD Prepreg
150 – 600g/m
2
Valid
Lloyds Register
LR21106189ALP
SE 75 RC Series Prepreg
RC200T RC660T
Valid
Lloyds Register
LR21106185ALP
SE 75 XC Series Prepreg
XC150 XC611
Valid
Lloyds Register
LR21106184ALP-01
SE 75 XC Series Prepreg
XC150 XC611
Valid
DNV-GL TA-DNVGL-
CP-0431-07273-0
PREPREG PROPERTIES
RHEOLOGY DATA
SE 75 resin viscosity profile conducted at 1 C (1.8 F)/minute.
TRANSPORT & STORAGE
When stored sealed & out of direct sunlight.
PROPERTY VALUE
Minimum Viscosity 1.2 Pa.s 12 P
Temperature at Minimum Viscosity 94 C 201 F
STORAGE TEMP UNIT VALUE
-18 C 0 F months 24
+18-22 C 64-72 F weeks 8
All prepreg materials should be stored in a freezer when not in use
to maximise their useable life, since the low temperature reduces
the reaction of resin and catalyst to virtually zero. However, even
at -18 C (0 F) the temperature of most freezers, the material will
eventually become unworkable.
When not in use SE 75 products should be maintained at -18 C
(0 F). To avoid condensation allow the rolls to reach room
temperature before removing the plastic wrapping.
HEALTH AND SAFETY
Please refer to SDS for up to date information specific to this
product.
TYPICAL CURE TIME & TEMPERATURES
0.3 C (0.5 F)/min should be considered the minimum ramp rate. Alternative cure cycles and processes can be used.
PROPERTY 70 C CURE (158 F) 80 C CURE (176 F) 120 C CURE (248 F) TEST STANDARD
Processing Method Vacuum Bag / Autoclave Vacuum Bag / Autoclave Vacuum Bag / Autoclave
Typical Ramp Rate 0.3 2 C/minute 0.3 2 C/minute 0.3 2 C/minute –
Cure Time 12 hrs* 6hrs* 45 minutes* –
Cure Pressure -1 Bar / +6 Bar -1 Bar / +6 Bar -1 Bar / +6 Bar –
Dry Tg (DMA) 85 C 98 C 125 C ASTM D7028
* Please refer to each product Technical Datasheet for minimum cure of ancillary products SA75-90, SFG75-90, SF75-90 and MP75-90.
1
10
100
1000
10000
100000
1000000
20 40 60 80 100 120
COMPLEX VISCOSITY (PA.S)
TEMPERATURE ( C)
SE75-08-0422 4
MECHANICAL PROPERTIES
CURED RESIN PROPERTIES
Resin cast oven cured for 12 hours at 70 C (158 F). Mean values.
PROPERTY SYMBOL UNIT
12 HOURS @ 70 C
(158 F)
6 HOURS @ 80 C
(176 F)
45 MINUTES @ 120 C
(248 F)
TEST STANDARD
Cured resin density cured g/cm 1.19 1.19 1.19 Archimedean principle
Tensile Strength T MPa 68 82 83 ISO 527-2
Tensile Modulus ET GPa 3.8 3.4 3.0 ISO 527-2
Flexural Strength F MPa 117 123 117 ISO 178
Flexural Modulus EF GPa 3.8 3.5 2.9 ISO 178
Compressive Yield
Strength
C MPa 147 140 117 ISO 604
UNIDIRECTIONAL LAMINATE PROPERTIES
Mean values derived from data from a single batch, cured 6 hours at 80 C (176 F). Customers with specific requirements must carry out tests
to prove conformity.
PROPERTY SYMBOL UNIT HEC FIBRE 150g/m HEC FIBRE300g/m HEC FIBRE 600g/m TEST STANDARD
Typical Fibre Density fibre g/cm 1.8 1.8 1.8 –
Fibre Modulus Efibre GPa 227-257 227-257 227-257 –
Resin Content – % 32-37 32-37 32-37 ASTM D3171 Method II
Fibre Volume Fraction Vf % 55 56 55 ASTM D3171 Method II
0 Tensile Strength** XT MPa 2775 2494 2188 ISO527-5
0 Tensile Modulus ** ET GPa 138 141 144 ISO527-5
0 Compressive Strength** XC MPa 1356 1390 1410 SACMA SRM1-94
0 Compressive Modulus** EC11 GPa 120 126 130 SACMA SRM1-94
90 Tensile Strength YT MPa 49 38 21 ISO527-5
90 Tensile Modulus ET22 GPa 8.7 8.7 8.6 ISO527-5
0 Flexural Strength XF MPa 1490 1538 1450 ISO14125
0 Flexible Modulus EF11 GPa 107 109 122 ISO14125
0 ILSS XILSS MPa 86 85 86 ISO14130
** Normalised to 60% Vf
PROPERTY SYMBOL UNIT IMC FIBRE 150g/m IMC FIBRE300g/m IMC FIBRE 450g/m TEST STANDARD
Typical Fibre Density fibre g/cm 1.79 1.79 1.79 –
Fibre Modulus Efibre GPa 275-310 275-310 275-310 –
Resin Content – % 32-37 32-37 32-37 ASTM D3171 Method II
Fibre Volume Fraction Vf % 58 59 58 ASTM D3171 Method II
0 Tensile Strength** XT MPa 2765 2722 2511 ISO527-5
0 Tensile Modulus ** ET GPa 172 177 172 ISO527-5
0 Compressive Strength** XC MPa 1450 1422 1458 SACMA SRM1-94
0 Compressive Modulus** EC11 GPa 157 143 152 SACMA SRM1-94
90 Tensile Strength YT MPa 33 39 TBA ISO527-5
90 Tensile Modulus ET22 GPa 8.3 7.9 TBA ISO527-5
0 Flexural Strength XF MPa 1387 1474 TBA ISO14125
0 Flexible Modulus EF11 GPa 134 134 TBA ISO14125
0 ILSS XILSS MPa 86 88 81 ISO14130
** Normalised to 60% Vf
SE75-08-0422 5
PROPERTY SYMBOL UNIT HMC FIBRE 150g/m HMC FIBRE300g/m HMC FIBRE 600g/m TEST STANDARD
Typical Fibre Density fibre g/cm 1.8 1.81 1.8 –
Fibre Modulus Efibre GPa 365-405 365-405 365-405 –
Resin Content – % 32-37 32-37 32-37 ASTM D3171 Method II
Fibre Volume Fraction Vf % 58 57 61 ASTM D3171 Method II
0 Tensile Strength** XT MPa 2515 2318 2226 ISO527-5
0 Tensile Modulus ** ET GPa 223 208 221 ISO527-5
0 Compressive Strength** XC MPa 1322 1122 1115 SACMA SRM1-94
0 Compressive Modulus** EC11 GPa 194 187 186 SACMA SRM1-94
90 Tensile Strength YT MPa – 26 21.8 ISO527-5
90 Tensile Modulus ET22 GPa – 7 7.2 ISO527-5
0 Flexural Strength XF MPa 1319 1397 1349 ISO14125
0 Flexible Modulus EF11 GPa 178 200 163 ISO14125
0 ILSS XILSS MPa 81 86 82 ISO14130
** Normalised to 60% Vf
CARBON WOVEN LAMINATE PROPERTIES
Mean values derived from data from a single batch cured using standard processing techniques and standard cure of 6 hours at 80 C
(176 F). Where test directions are given, they are with respect to the warp direction of the roll. Fabrics contained in these prepregs are 2X2
twill woven with High Elongation Carbon (HEC).
*Normalised to 55% fibre volume fraction
PROPERTY SYMBOL UNIT RC200T RC416T RC660T TEST STANDARD
Uncured Resin Content
–
% 39-45 39-45 39-45 ASTM D 3171 Method II
Cured Ply Thickness
–
mm 0.18 0.43 0.64 ASTM D792
Fibre Volume Fraction Vf
% 49 48 58 ASTM D 3171 Method II
0 Tensile Strength* XT
MPa 751 909 963 ISO 527-4
0 Tensile Modulus* ET GPa 71 63 59 ISO 527-4
0 Flexural Strength XF MPa 853 832 – ISO 527-4
0 Flexible Modulus EF11 GPa 53 51 – ISO 527-4
0 Compressive Strength* XC MPa 743 681 496 SACMA SRM1-94
0 Compressive Modulus* EC22 GPa 62 54 54 SACMA SRM1-94
ILSS M MPa 63 53 50 ISO 14130
SE75-08-0422 6
*Normalised to 55% fibre volume fraction
BIAXIAL (+/-45 ) CARBON LAMINATE PROPERTIES
Mean values derived from data from a single batch. Where test directions are given, they are with respect to the direction of the roll. Cured 12 hrs at 70 C
(158 F). Fabrics contained in these products are 2 layers of unidirectional High Elongation Carbon (HEC) fibres stitched together at +/-45 to each other.
HEC fibres are characterised by having a tensile modulus between 227-257GPa
PROPERTY SYMBOL UNIT XC150 XC411 XC611 TEST STANDARD
Resin Content
–
% 42 42 42
ASTM D 3171 Method
II
Cured Ply Thickness
–
mm 0.16 0.43 0.61 ASTM D792
Fibre Volume Fraction Vf % 53 52 56
ASTM D 3171 Method
II
+45 Tensile Strength* XT MPa 1128 992 726 ISO 527-4
+45 Tensile Modulus* ET GPa 62 67 66 ISO 527-4
-45 Tensile Strength* XT MPa 1193 857 723 ISO 527-4
-45 Tensile Modulus* ET GPa 59 67 66 ISO 527-4
+45 Flexural Strength XF MPa 930 1013 – ISO 527-4
+45 Flexible Modulus EF11 GPa 54 56 – ISO 527-4
-45 Flexural Strength XF MPa 987 903 – ISO 527-4
-45 Flexible Modulus EF11 GPa 56 58 – ISO 527-4
+45 Compressive Strength* XC MPa 694 739 432 SACMA SRM1-94
+45 Compressive Modulus* EC22 GPa 56 58 59 SACMA SRM1-94
-45 Compressive Strength* XC MPa 690 702 553 SACMA SRM1-94
-45 Compressive Modulus* EC22 GPa 56 60 61 SACMA SRM1-94
ILSS M MPa 65 56 34 ISO 14130
SE75-08-0422 7
NOTICE
All advice, instruction or recommendation is given in good faith but the selling Gurit entity (the
Company) only warrants that advice in writing is given with reasonable skill and care. No further duty
or responsibility is accepted by the Company. All advice is given subject to the terms and conditions
of sale (the Conditions) which are available on request from the Company or may be viewed at
Gurit s Website: www.gurit.com/terms-and-conditions.aspx
The Company strongly recommends that Customers make test panels in the final process conditions
and conduct appropriate testing of any goods or materials supplied by the Company prior to final
use to ensure that they are suitable for the Customer s planned application. Such testing should
include testing under conditions as close as possible to those to which the final component may be
subjected. The Company specifically excludes any warranty of fitness for purpose of the goods other
than as set out in writing by the Company. Due to the varied nature of end-use applications, the
Company does, in particular, not warrant that the test panels in the final process conditions and/or
the final component pass any fire standards.
The Company reserves the right to change specifications and prices without notice and Customers
should satisfy themselves that information relied on by the Customer is that which is currently
published by the Company on its website. Any queries may be addressed to the Technical Services
Department.
Gurit is continuously reviewing and updating literature. Please ensure that you have the current
version by contacting your sales contact and quoting the revision number in the bottom left-hand
corner of this page.
TECHNICAL CONTACT INFORMATION
For all other enquiries such as technical queries:
Telephone + 44 1983 828000 (08:30 17:00 GMT)
Email technical.support@gurit.com
24-HOUR CHEMICAL EMERGENCY NUMBER
For advice on chemical emergencies, spillages, fires or exposures:
Europe +44 1273 289451
Americas +1 646 844 7309
APAC +65 3158 1412
All trademarks used or mentioned in this document are protected by law.
E customer.support@gurit.com
W www.gurit.com