General Datasheet
PDS-SA80-16-0224 1
SA 80
TOUGHENED EPOXY ADHESIVE FILM
Low temperature cure
Designed for bonding prepreg skins to honeycomb and foam cores
Compatible with Gurit SE84LV, SPARPREG, ST94 & ST95 products
Toughened for impact resistance and peel strength
Controlled flow for maximum bond integrity
Lloyd s Register certified formats
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-SA80-16-0224 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 and Spabond formulated
resin 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. 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-SA80-16-0224 3
PRODUCT INFORMATION
AVAILABILITY
SA 80 is available in a variety of fabric forms, normally supplied on
a single silicon paper. 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 level – High
Colour – Green
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 292 P
Temperature at Minimum Viscosity 89 C 192 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)
PDS-SA80-16-0224 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
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 – 1 hr / 120 C (248 F)
Adhesive Film Weight (excl. 25g carrier) – 250g/m
2
Lap Shear Strength on Steel STEEL
36 MPA 5.2 Ksi BS 5350 C5
0 Climbing Drum Peel, Tool Face * PEEL 229 N/ 75mm BS 5350 C13
0 Climbing Drum Peel, Vac Bag Face* PEEL 337 N/ 75mm BS 5350 C13
* SE84LV / HEC skins either side of 48kg/m
3
Aramid Honeycomb
PDS-SA80-16-0224 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