General Datasheet
PDS-SA80-15-0618 1
SA 80
TOUGHENED EPOXY ADHESIVE FILM
Low temperature cure
Designed for bonding prepreg skins to honeycomb and certain cores
Compatible with SE 84LV, SE 91 & SE 85 prepregs & ST 93 SPRINT products
Toughened for impact resistance and peel strength
Controlled flow for maximum bond integrity
Lloyd s Register Certified Formats Available
INTRODUCTION
SA 80 adhesive film is a toughened film unsupported or on a glass carrier with excellent tack and drape characteristics.
It offers many advantages over traditional wet lay-up techniques for
bonding of composite skins to cores, including; consistent bond-line
thickness and weight, high strain to failure, high toughness, handling
convenience, controlled flow and an 8 week out -life at ambient
temperature (18-22 C/64-72 F).
PDS-SA80-15-0618 2
INSTRUCTIONS FOR USE
CURING SCHEDULE
CORE BONDING
Various core materials can be used with the adhesive film system,
including certain foams (provided that special procedures are
followed) and honeycombs.
The system is fully compatible with Ampreg 22, Ampreg 26 and
Ampreg Pregel liquid epoxy systems.
NOMEX OR ALUMINIUM HONEYCOMB CORES
1. Core to First Skin
For bonding honeycomb into place onto a cured laminate, a
minimum of a 250g film should be used, with extra resin film used
where there are any steps, wrinkles or unevenness in the laminate.
Apply the film over the laminate with the paper side uppermost then
remove the release paper. Bed in the honeycomb core to the film
and splice the core segments with a wrap of at least two layers of
film applied to each honeycomb edge. After positioning all the core
pieces, vacuum the core in place using at least 80% vacuum and
cure the adhesive film for a minimum of 4 hours at 85 C (185 F).
The full cure required will be achieved when the outer skin is cured
and bonded into place, using one of the cure cycles below.
2. Second Skin to Core
One procedure is to co-cure the outer skin together with the core
bond. For this, a single layer of 250g adhesive film should be rolled
over the honeycomb surface, and bedded well into the cells. In this
way it should be possible to reposition misplaced prepreg plies,
without disturbing the adhesive layer. With a controlled flow system
such as SE 70, care should be taken to ensure that excess resin is
not removed from the adhesive interface, by using a fine
microporous release film. It is also critical when using this process
that adequate precautions are taken to perforate the SA 80 skin to
allow air removal from the Nomex prior to gelation. Failure to do so
will result in skin blow off (contact Gurit Technical Services or see
SE 84LV / SA 80 Processing Notes for details).
PVC FOAM
Due to the wide variety of PVC and other foams available and the
cure temperatures involved, special procedures have been
developed which must be carefully followed when using foam with
SA 80. For details of these processes, please contact Technical
Services. Use of SA 80 with untreated PVC foams is not
recommended due to potential inhibition of cure.
CORECELL FOAM
Use of Corecell foam is preferable to PVC.
For full cure of SA 80 to be achieved, one of the following cure
cycles is recommended. If SA 80 is being co-cured with a
prepreg skin, then the cure cycle used for SA 80 will also be
that of the prepreg in the laminate. Where required cure cycle
of the prepreg being used and the SA 80 is different, then
whichever cure is the longest should be applied.
VACUUM TECHNIQUES
Consolidation of the core bond can be obtained either by
vacuum or pressure bags. Heating can be economically and
effectively achieved with either space heaters under an
insulated tent or heated blankets with insulation on top. Details
of the various types of system are available from Technical
Services.
A schematic diagram of a typical vacuum bag arrangement is
shown below.
PDS-SA80-15-0618 3
PRODUCT INFORMATION
AVAILABILITY
SA 80 is available in a variety of fabric forms, normally supplied on
a single silicon paper. Please contact Technical Support to discuss
specific requirements and availability. The product formats listed to
the right also benefit from 3
rd
Party Certification
PRODUCT DESCRIPTION STATUS CERTIFICATION
SA 80 Adhesive Film Valid
Lloyd s Register
MATS/4922/1
PROPERTY UNIT SA 80
Tack – High
Colour – Pale Green or Black
Adhesive Film Weight (standard products) g/m
2
100 150 150
250 400
Glass Carrier Weight g/m
2
– – 25 25 25
Total Film Weight g/m
2
100 150 175 275 425
PREPREG PROPERTIES
RHEOLOGY DATA
SA 80 resin viscosity profile conducted at 1 C (1.8 F) per minute.
TRANSPORT & STORAGE
When stored sealed & out of direct sunlight.
PROPERTY VALUE
Minimum Viscosity 71.4 Pa.s 714 P
Temperature at Minimum Viscosity 86 C 187 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, some reaction will still occur. In most cases after
some years, the material will become unworkable.
HEALTH AND SAFETY
Please refer to product SDS for up to date information specific
to this product.
MINIMUM CURE TIME & TEMPERATURE
Recommended minimum cure is 12 hours at 80 C (176 F) using vacuum bag processing.
PROPERTY OVEN / VAC BAG TEST STANDARD
Typical Ramp Rate 1 2 C (2 4 F) per minute –
Cure Temperature 80 C (176 F) 90 C (194 F) 100 C (212 F) 110 C (230 F) 120 C (248 F) –
Cure Dwell Time 12 hours 6 hours 3 hours 90 minutes 60 minutes –
Cure Pressure -1bar (14.5 Psi) –
Dry Tg1 (DMA) 99 C / 210 F ISO 6721 (DMA)
10
100
1000
10000
100000
30 50 70 90 110 130
COMPLEX VISCOSITY (P)
TEMPERATURE ( C)
PDS-SA80-15-0618 4
LAMINATE PROPERTIES
CURED RESIN PROPERTIES
Oven cured using standard vacuum bag processing techniques and a cure of 60 minutes at 120 C (248 F).
PROPERTY SYMBOL SA 80 TEST STANDARD
Tensile Strength T 48 MPa 7 ksi ISO 527-2
Tensile Modulus ET 2.5 GPa 0.36 Msi ISO 527-2
Flexural Strength F 90 MPa 13 Ksi ISO 178
Flexural Modulus EF 2.2 GPa 0.32 Msi ISO 178
Charpy acN 2.81 kJ / m
2
ISO 179-1
Fracture Toughness KIC 2.61 MPa.m
0.5
ASTM D5045
CURED ADHESIVE MECHANICAL PROPERTIES
Oven cured using standard vacuum bag processing techniques and a cure of 60 minutes at 120 C (248 F).
PROPERTY SYMBOL SA 80 TEST STANDARD
Cure cycle – 12 hrs / 80 C (176 F) 1 hr / 120 C (248 F) 12 hrs / 80 C (176 F)
Adhesive Film Weight (excl. 25g carrier) – 250g/m
2
300g/m
2
300g/m
2
Shear Strength on Steel STEEL
– 36 MPA 5.2 Ksi 38 MPA 5.5 Ksi BS 5350 C5
Shear Strength on Aluminium ALU
– 24 MPa 3.5 Ksi – – BS 5350 C5
Cleavage Strength on Steel CLEAVage – 12.1 kN 2720 lbf 11.5 kN 2585 lbf BS 5350 C1
0 Climbing Drum Peel* PEEL 185 N / 75.5mm – – – – BS 5350 C13
90 Climbing Drum Peel* PEEL 170 N / 75.5mm – – – – BS 5350 C13
0 Plate Shear Strength* 11
1.9 MPa 0.28 Ksi – – – – ASTM C273
0 Plate Shear Modulus* G11 64 MPa 9.3 Ksi – – – – ASTM C273
90 Plate Shear Strength* 22
3.4 MPa 0.49 Ksi – – – – ASTM C273
90 Plate Shear Modulus* G22 96 MPa 14 Ksi – – – – ASTM C273
* SE84LV / RE200 Glass Skins either side of 15mm Aramid Honeycomb
PDS-SA80-15-0618 5
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