THEMESPRAY 85 Spray foam system
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Product Description
THEMESPRAY 85 is a two component, 1:1 ratio, carbon dioxide
blown, rigid foam system which when processed through suitable
spray machinery ( Gusmer, Glas-Craft/Probler etc ) will produce
a rigid foam of approximate density 85kg/m3 with exceptionally
good compressive strength and a smooth surface.
Uses
THEMESPRAY 85 is used for:
- Speciality scenic replication.
THEMESPRAY 85 should preferably be applied under factory
conditions and the reactivity of the system can be tailored to suit
the conditions likely to prevail at the time of application. It is
essential that the foam is protected from damage during
installation, ultra-violet radiation and atmospheric degradation by
a suitable elastomeric coating.
Equipment
THEMESPRAY 85 can be processed through all standard foam
spray machines. The machine should be capable of maintaining
the mix ratio at ±2% accuracy and controlling the component
temperatures at 40-60oC (variable).
Recommended machine settings
|
Block Temperature
|
Minimum, operating |
120-140°F / 50-60°C
|
| Hose Temperature |
Minimum, operating |
120°F / 50°C |
| Chemical Pressures |
Minimum, operating |
500 psi, |
| |
not greater than 200 psi
difference iso / res
|
Storage, Handling and Personal Protection
The recommendations in our Safety Data Sheet for this product
must be followed at all times.
Spray Techniques
The guidelines in Isothane Limiteds standard
specification should be followed but the general requirements
are as follows.
- The substrate should be clean, dry and free of dirt,
grease, oil and loose particles.
- In certain cases primer may be necessary to maximise
adhesion.
- Factory conditions must be suitable for spraying
with regard to humidity and ambient temperature..
Physical Properties
THEMESPRAY 85 is a two component, modified polyurethane rigid foam which, sprayed
through suitable foam machinery, gives a product of nominal density 80kg/m³.
Laboratory test results
(cup tests at 20°C):- |
|
|
| Cream time |
4-5
|
seconds |
| Tack free time |
35-40
|
seconds |
| Rise time |
48-52
|
seconds |
| Free rise density |
75-80
|
kg/m³ |
SG
|
1.09
|
@ 25°C |
| Viscosity |
1480
|
cps @ 25°C |
Properties of Foam Core
Material sprayed onto a steel substrate at 15ºC using GUSMER or GLAS-CRAFT
equipment, to give a 65mm total thickness – see table on page 3.
Fire Safety
Rigid polyurethane foams are organic, combustible materials and may present a fire risk in
certain applications if exposed to fire and/or heat. Do not use welding and cutting torches,
flame or any other ignition sources.
Typical Properties Of
THEMESPRAY 85 Foam Core |
Value |
Test Method |
| Overall Core density |
70-90 kg/m³ |
BS4370 |
| Core density |
70 kg/m³ |
BS4370 |
| Compressive strength - Parallel to rise |
500 kpa |
BS4370 |
| Tensile strength - Perpendicular to rise |
500 kpa |
BS4370 |
| Shear strength - Perpendicular to rise |
350 kpa |
BS4370 |
| Close Cell Content |
90 % min. |
ASTM D2856 |
| Thermal Conductivity -10°C Mean Aged |
0.030 W/mK |
ASTM C518 |
| |
|
(ANACON) |
| Water Absorption - 7 days no head |
0.24 kg/m² |
ASTM D2127 |
| Dimensional Stability - 7 days @ -15° C |
1% vol. |
BS4370 |
| (Linear Change) - 7 days @ 80°C |
+2.0% vol. |
BS4370 |
|