FORMATHANE®
LIQUID POLYURETHANE
MIXING INSTRUCTIONS
Forman Insulation Sales Limited's Formathane® packs provide a two component, easily
mixed liquid system for the production of rigid polyurethane foam.
Foam made from correctly mixed Formathane® system exhibits a low thermal
conductivity, low water permeability, tight closed and uniform cell structure which adheres
to most metal, plastic and wood surfaces.
The foam has excellent strength to weight ratio and resists most solvents, oil and petrol.
RECOMMENDED MIXING INSTRUCTIONS
To obtain ideal foam characteristics, it is recommended that the components temperature,
prior to mixing, be in the range of 15ºc to 22ºc.
EQUIPMENT
1.
A balance accurate to +/- 0.5% with sufficient range to cover the total weight of
materials to be foamed.
2.
A suitable vessel, such as a strong cardboard cup or polyethylene pail.
3.
An agitator - a strong shaft fitted with a circular disc is recommended.
4.
A mixing device - a hand held or mounted electric drill capable of mixing at 2500
to 3500 rpm is recommended.
MIXING BY HAND IS NOT SUITABLE
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METHOD
1.
The required amount of material is calculated from the volume of the space to be
filled.
Allowance should be made for the material that will be left in the mixing vessel
after pouring is completed.
As an approximate guide, 1kg of mixed Formathane® will yield 1 cubic foot of
finished product.
2.
The amount of each individual component can be calculated from th e
resin/activator ratio of 1 pbw: 1 pbw.
NB: The resin is labelled Blue, the activator is labelled Red.
3.
The required amount of resin is then weighed into the "tared" mixing vessel to +/0.5%, then the required amount of activator is weighed into the mixing vessel on
top of the resin.
4.
Immediately mix the two components with the appropriate high speed mixer until
the mixture is thoroughly blended, ie no streaking, or until 20 seconds has
elapsed.
5.
Pour the mixture into the prepared space that is to be foamed as soon as possible.
The foam mixture will expand to its full volume in 3-4 minutes. The surface
of the foam will be "Tack-Free" in approximately 15 minutes.
The foam will cure at room temperature, attaining its maximum physical
properties in about 24 hours.
If pouring is done into metal moulds, or between metal skins, preheating the
metal to approximately 40-50ºc reduces the curing cycle and enhances
adhesion of the foam to the metal face.
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STORAGE AND PACKAGING
Formathane® Resin (Blue Label) contains volatile HCFC 141b (boiling point 23ºc). Care
should be taken to seal the containers properly when not in use to avoid losses of 141b.
Avoid storing containers in direct sunlight to minimise pressure generation within the
container.
Storage temperatures between 15ºc and 25ºc are recommended.
CAUTION
Polyurethane systems consist of a resin reacting with an activator. The
activator contains an organic isocynate (MDI) which is toxic in low vapour
concentrations and can induce skin or eye irritations and/or respiratory
difficulties.
All foaming operations should be carried out in a well ventilated area and personnel
should be equipped with protective eyewear and clothing. If foaming is performed in an
enclosed area then a ventilating fan or the correct form of gas mask should be provided.
The chemical, physical and physiological properties of these materials are not fully
known. Their handling or use may be hazardous. References to potential uses are
intended only to suggest consideration and investigation. We make no warranty that any
particular chemical is suitable for any particular use and no such warranty is to be
implied.
FORMATHANE® is a registered tradename of Forman Insulation Sales
Limited.
The information in this leaflet is issued in good faith.
Forman Building Systems Ltd can accept no responsibility for omissions or errors in content or interpretation.
CALL FREE NATIONWIDE 0800 45 4000
AUCKLAND
09 276 4000
HAMILTON
07 850 8395
ROTORUA
07 348 2733
WELLINGTON
04 568 7132
www.forman.co.nz
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CHRISTCHURCH
03 379 9329
DUNEDIN
03 474 1800