• DANA Sandwich Panels are manufactured in automatic sandwich panel press with Polyurethane foam injection .Combination of wide variety of facing materials, surface patterns and insulations offer the customers a wide choice of panels to choose from.

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Surface Finish Types Top & Bottom Sheet Material Types Insulation Types
           Plain           Pre-Painted Aluminum Polyurethane   (PUR)

Insulation Specification

  • Thermal Conductivity Value : Amount of heat (W) passing through a material having surface of 1 M2 and thickness 1 M in order to rise temperature by 1oC . Units are W/m K
  • K value (Insulation Value) : Thermal conductivity divided by thickness of the material [ W / m2 K]
  • U value (Total Insulation Value) : Also known as Overall Heat Transfer Coefficient determined by the insulation value of the various materials forming the panel . [ W / m2 K ] , KCal/m2 h oC , BTU/ F t2 h oF
On Continuous System   Density K value
   Polyurethane   (PUR) 35-40 Kg/m3 0.022 w/m2K

Please note : Lower the K value , better is insulation capability

Polyurethane Properties

  • Mechanical Characteristic of Foam
 Density  35-40 kg/m3 (as per BSEN 1602:1997)
 Tensile Stress  150 kpa (as per BSEN 1608:1997)
 Compression Resistance  100 kpa (as per ASTM C165 :2000)
 Shear Resistance  150 kpa (as per ASTM 271/271M)
 Fire Property   B2/ B3 as per DIN 4102-1
  • Insulation Capacity
K Value – Thermal Conductivity 0.022 w/m2K
 Tolerance + /- 0.002
  • Water Absorption of the foam after 24 hours: 1.0 % of Volume
  • Closed Cell content > 94%
  • Overall Heat Transfer Coefficient (U) varies with the thickness of the panel
Polyurethane Panel U Value chart
 Core Thickness in mm    40    50    75   100
 Overall Heat Transfer Coefficient “U”  Value
 W / M2 oC  0.525 0.420  0.290  0.210
 KCAL / M2 h oC  0.451  0.361  0.247  0.181
 BTU / F t2 h oF  0.092  0.074  0.050  0.037