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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 Limited’s 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