Continuous lamination processes and large panel presses make it possible to produce laminated panels up to 12 m long. The combination of STYROFOAM™ core and steel surface gives panels structural strength and high insulating performance and enables entire walls to be formed, without the need for horizontal joints.
STYROFOAM extruded polystyrene insulation is widely used as the core material for cold store panels. It provides an ideal bonding surface for lamination to food-safe colour-coated steel.
water and water vapour resistance: the closed cell structure makes it highly resistant to water in all forms, minimising the risk of ice build up;
long-term thermal performance: minimal degradation from repeated freeze/thaw cycles;
low thermal conductivity: the required thermal performance can be achieved with minimal thickness of insulation, maximising space utilisation;
long-term performance: minimising maintenance and running costs;
close dimensional tolerance: STYROFOAM can be supplied cut to accuracies of +/- 0.5mm, making it ideal for precision bonding.
STYROFOAM LB-A is available in widths up to 1200mm for use in panels for chill rooms and mid-range cold stores. Dow manufactures billets of STYROFOAM which are supplied to a network of specialist fabricators. Dow can also supply customers directly with material in bespoke sizes, subject to minimum volume requirements.
The thickness of insulation in the panel core required to achieve a specified thermal performance (D) is calculated by the following equation:
D = λ.∆t/Q
D = thickness of insulation (m)
Λ = lambda value of insulation (W/mK)
∆t = difference between internal and external temperatures
Q = Heat flow (W/m2)
Commonly used values for heat flow (Q) range from 8 - 10 W/m2.
Panel span capabilities:
The spanning capabilities of panels with cores of STYROFOAM are determined from known bending and I-beam principles. The theoretical deflection (d) of a panel supported at both ends with evenly distributed load is calculated from:
d = 5.P.l3/384.E.I + P.l/8.A.G
d = deflection (mm)
P = load (N/mm) x Span (mm)
l = span (mm)
E = modulus of elasticity of the skin material (N/mm2)
I = moment of inertia of the panel (mm4)
A = distance between neutral axes of the facings x panel width (mm2)
G = shear modulus of the core