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Comparison of Polycarbonate Sheets with Conventional Materials


Polycarbonate multiwall sheets are substantially superior to all the conventional skylight materials in almost all areas of comparison. The following comparison chart will provide you a better insight on its superiority:
Property Polycarbonate FRP
Impact Resistance Excellent Good
Weather Resistance Excellent Poor
Temperature Res. Up to 120 Deg. C Below 100 Deg. C
Light Transmission Up to 89% Up to 80% **
Fire Spread Self Extinguishing Flammable
Thickness Uniform Varying
Maintenance Easy Difficult*
TAC Approval
(% of Total Roof Area)
5% Only 2%
In addition to the above Comparison chart, it would be pertinent to mention here that multiwall polycarbonate sheets provide excellent value for money and perform effectively for years with minimum maintenance. Since Polycarbonate multiwall sheets are made from extruded sheets, no thickness variations occur. However, FRP sheets have varying thickness across section of the sheets.

Types of Polycarbonate Sheets:
Compact / Transparent Polycarbonate Sheets
These are solid polycarbonate sheets which are available in clear and tinted variants. These sheets are generally chosen for applications where vision through the glazing medium is necessary. These sheets are available in a range of thicknesses from 1.3mm to 8mm. These sheets have been extensively used for manufacturing riot shields employed by Rapid Action Forces as personal protection during riot control and mob dispersal. Embossed / Textured Polycarbonate Sheets These are solid polycarbonate sheets with a texture on one surface.

The purpose of texturing is to provide light diffusion and prevent see-through vision as deemed necessary for a variety of applications.

Sheets are available in clear and tints, usually in thickness ranging from 2mm upto 6mm. 2mm thick embossed polycarbonate sheets are the most commonly preferred material for industrial skylighting after thermoforming the same into matched profiles. Opal White Polycarbonate Sheets These are solid polycarbonate sheets with milky white colour. These sheets are available in 1.3mm, 1.5mm, 1.7mm, 2mm & 3mm thickness. Most popularly used for ‘glow signs’ these sheets are gaining popularity in industrial skylights due to their excellent light diffusion and minimal glare. Multiwall Sheets Multiwall sheets, as their name suggests are hollow or fluted polycarbonate sheets which have two thin walls separated by vertical ribs. The hollow air gap provides excellent thermal insulation property and the sheets are extremely light weight.

The vertical ribs also provide superb rigidity to these sheets.

Multiwall sheets are a product of choice for atria, vaulted skylights, canopies, awnings and large skylight domes in commercial areas. These sheets provide excellent economic value for such applications. Multiwall sheets are available in clear, tints and opal white variants. The thickness range is as follows: 4mm, 6mm, 8mm, 10mm, 10mm Triple wall & 16mm Triple wall.
 
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