Products
Black Knight is Melmart’s eco acoustical underlayment ideal for use under all of our laminate, engineered and solid hardwood. If you are going to be floating the floor, look no further than this underlayment. The value proposition with Black Knight is simple, very high end specifications at a very competitive price point. With this 3 mm pad you will get a full vapour barrier, significant sound absorption qualities, non-allergenic, and approved for use over radiant heat.
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SPECIFICATIONS |
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IIC Rating |
71 |
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FIIC Rating ( Field Test ) |
70 |
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STC Rating |
67 |
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% of Sound Transmission Loss |
70% Over 800hz |
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Water Resistance |
Waterproof (Moisture can not penetrate closed cell membranes) |
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Thickness |
3 mm total |
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Roll Dimensions |
43” High – 9 3/4” Diameter |
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Roll Weight |
18 lbs. |
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Square Footage per Roll |
200 sf |
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Rolls per Pallet |
25 Rolls |
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TECHNICAL PARAMETERS |
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Test Item |
Method |
Unit |
L-4000 |
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Tensile Strength |
JISK – 6767 |
Mpa |
> 0.12 |
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Elongation at Break |
JISK – 6767 |
% |
> 200 |
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Density |
JISK – 6767 |
G/cm3 |
0.022 – 0.025 |
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Eear Strength |
JISK – 6767 |
N/m |
> 850 |
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Compressive Strength |
JISK – 6767 |
Mpa |
> 0.035 |
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The change rate of size after heating |
JISK – 6767 |
% |
< -3 |
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Permanent deformation after press |
JISK – 6767 |
% |
< 5.5 |
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Water absorptivity |
JISK – 6767 |
G/cm3 |
0.003 |
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Thermal conductivity |
JISK – 6767 |
W/MK |
0.035 |
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Alkalinity resistance |
No Obvious Change |
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Salt resistance |
No Obvious Change |
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Oil resistance |
No Obvious Change |
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Acid resistance |
No Obvious Change |
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Combustibility |
Auto- extinguishing quality Grade 1 |
FEB / 2010 / 001 SPC |
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Smoke content |
20 SDR |
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Oxygen index |
27 OI |
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