Foam Sheets, PVC Foamed Sheets, india

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Foam Sheets - PVC Foamed Sheets

INTRODUCTION
FINLIGHT PVC foamed sheets are ideal for use in advertising, construction and industry. FINLIGHT sheets feature
lightweight, durable and versatile surfaces which can be painted, printed, embossed, engraved or milled, according to customer specifications. FINLIGHT sheets can be fabricated and installed in an easy way with conventional tools and simple handling methods, thus guaranteeing cost-effectiveness. FINLIGHT white sheets are available in 2 mm and 3 mm thickness and have been specially designed for Digital Print Mounting Application. FINLIGHT can be distinguished by a smooth matte finish on both sides.

MAIN FEATURES
FINLIGHT features the following benefits :
• Half the weight of solid P.V.C. sheets.
   (Specific gravity 0.70- 0.75)
• Same thickness at lower cost.
• Superior impact resistance. Good mechanical    properties. Good insulation, lower heat transmission.
• Easily worked with conventional tools, prints and    paints.
• Can be easily bonded, vacuum formed, nailed and    bolted.
• Low Flammability and selfextinguishing.
• Low water absorption.
• High chemical resistance.
• Meet various international standards.
• Non-toxic.

TYPICAL APPLICATIONS
Advertising - Signs, displays and exhibition boards, etc.
Construction - Models, partitions, wall cladding, interior
decoration, air conditioning ducts, etc.
Industry - Control cabinets and panels, structures for corrosive environments, ducts, etc.
Thanks to the fact that FINLIGHT is ideally suited for use in food processing plants. The sheets are safe for contact with infants and children.
These applications are the most obvious uses for FINLIGHT sheets; other uses are constantly being found, limited only by a user’s inventiveness.

PRODUCT SPECIFICATIONS

FINLIGHT can be provided with protective polyethylene film on one side, on request.

WELDING : FINLIGHT sheets can be welded to each other or to other rigid PVC sheets with standard hot-air welding equipment, or using the Hot-Blade method. FINLIGHT requires the same treatment as other thermoplastic materials, as follows :
• Proper preparation of the surfaces to be joined.
• Selecting the appropriate welding temperature.
• Correct joining pressure or force.

For Hot - Air Welding
• It is essential that there be even heat distribution on the welded surfaces. Localized overheating (hot spots) must be avoided.
• Excellent results are obtained with normal PVC welding rods.

Recommended Working Conditions
• Angle starting groove of 600C.
• Welding temperature approx. 2800C- 2900C.
• Welding speed approx. 1 ft/min

For Hot Blade Welding
• For butt welding of 3.0 mm - 6.0 mm thick
• FINLIGHT, the time and temperature may vary slightly
according to the sheet thickness.
• Hot Blade temperatures : 2400C- 2500C
Parts must be kept pressed together until the materials have
solidified. Any residual welding beads or ridges can be removed
with conventional cutting blades or tools.

FABRICATION DATA

THERMOFORMING
FINLIGHT sheets are lightly expanded materials, due to their closed cell structure. However, they can be thermoformed using vacuum forming, pressure forming or a combination of the two. Standard tools used in thermoforming of plastic sheets may be used on FINLIGHT.
Larger FINLIGHT sheets require air support to avoid excessive sagging. For shallow forms almost any type of equipment for conventional thermoforming will produce satisfactory results. For more complex deep draw forms, double-sided (sandwich-type) heaters are necessary. FINLIGHT’s reaction to working is markedly different from solid plastics. The working cycle is usually shorter,
and the radius and depth of draw are limited to the extent that the surface of the material will stretch.

FORMING TEMPERATURE
A. THERMO-ELASTIC RANGE 1150C-1300C
Good extensibility of material, contour definitions are somewhat limited. The ORIGINAL smooth FINLIGHT surface is retained.
Recommended maximum draw ratio h:d approx. 1:1.25
B. THERMO-ELASTIC RANGE 1600C-1700C.
Medium extensibility, contour definition excellent, surface gets a grainy look due to slight after-expansion in the skin. Larger sheets need air support to prevent sagging. At thermoforming temperatures of 1600C-1700C, slight changes in colour of the sheet may take place.

HEATING CYCLE
With radiation heat sources, the heating cycles are much shorter than for solid plastics, and depend on the type of forming machine.
Ceramic type infrared heaters are most suitable. Double sided (top & bottom) heating is strongly recommended, especially for thicker sheets.

Approximate Heating Cycle for Single-Sided Heating with Ceramic Heaters
Heater Element Temperature : 4500C
Power Density : 20 kw/sq.m.

Approximate Heating Cycle for Double-Sided Heating with Ceramic Heaters
Heater Temperature : Top - 3800C, Bottom - 1500C
Power density : 40 kw/sq.m.

Foam Sheets - PVC Foamed Sheets