Table notes


Nominal value is an average value of a mechanical property at a nominal density. Minimum value is a minimum guaranteed mechanical property a material has independently of density. 1) Typical density variation –10% to +15% 2) Perpendicular to the plane. All values measured at +23°C. 3) Thermal conductivity at +20°C. 4) Water vapour permeability has been tested for densities 45-80kg/m3


.


Matrix 7-7 is PVC based and has a low carbon footprint compared to core materials such as PET (Credit Diab Group).


product but the company stated that Matrix 7-7 has been used in decks for customers in Finland and Estonia. Matrix 7-7 delivers good mechanical


properties for its weight. Please refer to Tables 1 and 2. Technical information available at the time of writing states that: “Continuous operating temperature


Higher densities yields lower values, hence, the water vapour permeability < 4.0 • 10-8


m2 /s. *) Testing is ongoing. Values will be published as soon as completed.


[of Matrix 7-7] is –200°C to +70°C. The foam can be used in sandwich structures, for outdoor exposure, with external skin temperatures up to +85°C. Normally Divinycell Matrix 7-7 can be processed at up to +90°C with minor dimensional changes. Maximum processing temperature is dependent on


time, pressure and process conditions”. Further information on compatibility with specific processing parameters cannot be given in this feature. SBI


* Environmental declarations, Plastics Europe: www.plasticseurope.org.


Ship & Boat International July/August 2010


47


Feature 2


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