Sandwich PU Wall Panel

Insulated Sandwich pu wall panels are made up of polyurethane foam which is sandwiched between two PPGI/ PPGL sheets. Alfa Sandwich puf panels are widely used in PEB Constructions, Schools, industrial buildings, refrigerated warehouses in the present days as it is fast and easy to assembly. Alfa Sandwich pu wall panels are available in various sizes along with various types of Sheets like GI sheets, SS sheets.
The raw material used for manufacturing PU panel is CFC free and fire retarded grade. Panels are provided with Tongue & Grove joints and specially designed Camlocks to enhance airtight assembly. PUF Sandwich panels are available with pre coated GI sheets, SS sheets or as directed.
The standard density of the pu panel is 40±2 Kg.m3. Also available in different density.

Manufacturing Process

The top and bottom coil (sheet metal) are clamped onto the plants unwinding unit and fed into the machine. In the first step, “corona system” cleans both reverse sides of the sheet metal using high frequency to remove greases and dirt and to guarantee the best possible subsequent full spread adhesion between foam and sheet metal. Thereafter the protective films are rolled onto outside of both metal sheets. The sheets are then brought together, the bottom sheet is foamed by the swinging foam head and the top sheet is mechanically steadied. Immediately after that, the panel is fed into the heated drying tunnel where the foam expands to its full volume, binds to the sheets and transforms both sheets to one robust, shear resistant composite structural panel. After leaving the tunnel the panels are cut according to your specification using flying saw/cutter.

Specifications

Panel thickness available 30mm, 40mm, 50mm, 60mm, 80mm, 100mm, 120mm
Panel width available 1000mm
Panel length available 2000mm-12000mm
Average density 38± 2kg/m
Thermal conductivity 0.024-0.03 W/m
Temperature range -40+800C
Free from CFC CFC free
Type of foam B1, B2, B3, PIR
Heat transfer co-efficient -0.022W/M2*k
Pressure 0.10Mpa
Cubic Area Change =1%(-30 C – 100 C/96h)
Finish Ribbed, Micro Ribbed, Plain Ribbed
Polyester primer 5 micron Non-toxic food-graded STANDARD polyester finish paint.
RAL 9010 color : 20 micron
Back coat 5 micron
Resistance to saline mist 5 micron
500h (ECCA TB) 100 h (ASTM D 2247)

Advantages

  • Tongue and groove type joinery system.
  • Hidden self tapping screws for aesthetic appeal.
  • Great energy saver
  • Fast and easy installation
  • Light weight
  • Space saving
  • Various designs.vivid colours.
  • Energy conservation as per ECBC code.
  • High load bearing capacity at low weight.
  • Excellent and durable thermal insulation.
  • capacity for rapid erection without lifting equipments.Easier installation in hostile weather conditions.
  • Easy repair and replacement in case of damage.
  • Long life and very low maintenance cost
  • Good sound insulation
  • Reasonable fire reaction and resistance

Applications

  • Industrial Buildings.
  • Partitions-Semi Glazed.
  • Commercial Buildings.
  • Warehouse/Godown.
  • Cold storage/Blast Freezers.
  • Farm House.
  • Pharmaceutical Manufacturing units.
  • Air Handling Units.
  • Poultry Form.
  • Dairy industry.
  • Malls/Departmental Stores.

Energy Efficiency

with 80 mm thick sandwich panels with polyurethane rigid foam, the U value is 0.297 W/(m K).In comparison, asolid wall with 24 cm thick masonry and 2 cm plaster walls has a U value of 1.85 W/(m K).
Rigid polyurethane foam combines excellent thermal insulation properties with good mechanical strength,making it an outstanding construction material that does not rot,mold-resistant,odorless and non-toxic for all conceivable applications,The foam is resistant to the chemicals typically used in construction and is compatible with most solvent-containing adhesives,paints and wood preservatives. Polyurethane rigid foam is extremely durable and can be installed easily and securely,ensuring cost-effective,efficient construction.

puf panels energy Efficiency