Detailed Project Report (DPR) on discontinuous puf panels using cyclopentane as a blowing agent

Detailed Project Report (DPR) on discontinuous puf panels using cyclopentane as a blowing agent
Code #3690
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India
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Industry Overview

Thermally insulated composite building elements, commonly known as sandwich panels, are used for roof and wall cladding to form efficient building envelopes and partition walls. These panels generally consist of an insulating foam core bonded between inner and outer galvanised sheet metal covers. They are manufactured using continuous or discontinuous production systems and are widely applied in industrial construction, including industrial halls, cold storage facilities, roofing systems, and wall structures.

Sandwich panels are composite elements designed to provide structural rigidity, load-bearing capacity, and thermal insulation. Common core materials include polyurethane (PUR), mineral fibre wool (MIWO), and polystyrene. The bonding between the facing sheets and shear-resistant core contributes to the rigidity of the panel, while the insulating core improves the thermal performance of the building envelope.

Polyols are polyhydric alcohols containing three or more hydroxyl groups and are combined with isocyanates to produce polyurethane systems used for thermal insulation, including refrigeration applications. Polyurethanes are addition polymers formed through the chemical reaction of polyols and isocyanates, which can occur readily at room temperature. Rigid low-density polyurethane foams are widely used as commercially available insulation materials.

Cost Estimation

Particulars Value
Plant Capacity 500 sq.mt/Day
Land & Building (6000 sq.mt.) Rs. 4.64 Cr
Plant & Machinery Rs. 4.95 Cr
Working Capital for 2 Months Rs. 1.42 Cr
Total Capital Investment Rs. 11.41 Cr
Rate of Return 32%
Break Even Point 48%

Content Index

  • INTRODUCTION
  • PROPERTIES AND CHARACTERISTICS
  • B.I.S. SPECIFICATION
  • ADVANTAGE AND APPLICATION OF PUF PANEL
  • PUF PANEL APPLICATION
  • BENEFIT AND SPECIFICATION
  • OF PUF PANEL IN STEEL STRUCTURE
  • BENEFIT OF PUF PANEL IN STEEL STRUCTURE
  • BENEFITS:
  • SPECIFICATION:
  • OVERVIEW OF INDIAN SANDWICH PANEL MARKET
  • THE SIGNIFICANT DRIVERS IN THE GLOBAL INSULATED PANEL MARKET WILL BE:
  • CYCLOPENTANE: THE ECO FRIENDLY BLOWING AGENT
  • WHY CYCLOPENTANE
  • CYCLOPENTANE VS CONVENTIONAL HCFC-141B:
  • PRESENT MANUFACTURE OF PUF PANEL
  • MARKET POSITION OF PUF PANELS
  • KEY DEVELOPMENTS IN THE SANDWICH PANEL MARKET
  • SANDWICH PANEL MARKET MAJOR PLAYERS
  • INCREASING DEMAND FOR BUILDING WALLS
  • PRESENT MANUFACTURERS/SUPPLIERS
  • OF DISCONTINUOUS SANDWICH PANEL
  • RAW MATERIALS
  • DIISOCYANATES
  • POLYOLS
  • RIGID POLYURETHANE FOAM –SANDWICH PANELS
  • CONSTRUCTION FOAMS
  • TRANSPORTATION FOAMS
  • SUMMARY OF AVAILABLE TECHNICAL OPTIONS
  • THE OPTIONS CAN THEREFORE BE SUMMARIZED AS FOLLOWS:
  • N- & ISO-PENTANE –
  • LIQUID HFCS –
  • CO2 (WATER BLOWN) –
  • MANUFACTURING PROCESS OF SANDWICH PANEL
  • PROCESS IN DETAILS
  • DISCONTINUOUS PRODUCTION OF SANDWICH PANELS
  • EXAMPLES OF PANEL DESIGNS AND CONNECTIONS
  • SINGLE-SHOT METHOD
  • MULTIPLE-SHOT METHOD
  • LANCE METHOD
  • WITHDRAWAL METHOD
  • MULTIPLE-OUTLET POURING
  • PANEL FOAMER
  • MOLD POSITIONS
  • PROCESS FLOW DIAGRAM
  • DISCONTINUOUS PANEL LINE
  • PRODUCTION OF PANELS
  • WITH DISCONTINUOUS METHOD
  • PUF PANEL FORMULATION
  • DETAILS OF PU DISCONTINUOUS PANEL LINE
  • PU DISCONTINUOUS SANDWICH PANEL LINE
  • ROLL FORMING LINE
  • HOT PRESS LINE
  • ADVANTAGES OF PUR SANDWICH PANEL
  • THE SPECIFICATION OF PANEL & STEEL
  • LINE SIZE
  • ELECTRIC CONSUMPTION
  • PRODUCTION TECHNOLOGIES OF SANDWICH PANEL
  • CONTINUOUS AND DISCONTINUOUS PANEL MANUFACTURING METHODS
  • TECHNICAL SPECIFICATION OF PUF PANEL
  • TECHNICAL SPECIFICATION
  • PROPERTIES OF PUF
  • FLOOR INSULATION BY PUF BLOCKS
  • PUF PANELS AVAILABLE UNDER FOLLOWING SPECIFICATION:
  • TESTING: FOR QUALITY CONTROL:
  • OTHER PROCESS FOR SANDWICH PANELS SANDWICH PANELS (CONTINUOUS PROCESS)
  • THE PANEL PROPERTIES:
  • SANDWICH PANELS WITH A MINERAL FIBRE WOOL INSULATION CORE
  • DIMENSIONAL TOLERANCE FOR SANDWICH PANELS
  • DIMENSIONAL TOLERANCES (GENERAL) FOR SANDWICH PANELS:
  • DIMENSIONAL TOLERANCES WITH CORRUGATIONS
  • TRANSVERSE BOW – CUPPING OF THE PANELS
  • SUBSIDY IN INDIA FOR SETTING UP COLD CHAIN
  • WHAT IS A COLD CHAIN
  • WHO CAN SETUP A COLD CHAIN
  • WHAT ARE THE CRITERIA’S FOR OBTAINING FINANCIAL ASSISTANCE FOR COLD CHAIN
  • WHAT IS THE AMOUNT OF FINANCIAL ASSISTANCE PROVIDED FOR SETTING UP OF COLD CHAIN BY MOFPI
  • HOW IS THE FINANCIAL ASSISTANCE PROVIDED DURING THE SETTING UP OF THE UNIT
  • HOW SHOULD THE APPLICATION FOR FINANCIAL ASSISTANCE BE MADE
  • PLANT LAYOUT
  • SUPPLIERS OF RAW MATERIALS
  • CYCLOPENTANE
  • SUPPLIERS OF PLANT AND MACHINERIES
  • SUPPLIERS OF PLANT & MACHINERIES (IMPORTED)

Appendix

  • APPENDIX – A:
  • 01. PLANT ECONOMICS
  • 02. LAND & BUILDING
  • 03. PLANT AND MACHINERY
  • 04. OTHER FIXED ASSESTS
  • 05. FIXED CAPITAL
  • 06. RAW MATERIAL
  • 07. SALARY AND WAGES
  • 08. UTILITIES AND OVERHEADS
  • 09. TOTAL WORKING CAPITAL
  • 10. TOTAL CAPITAL INVESTMENT
  • 11. COST OF PRODUCTION
  • 12. TURN OVER/ANNUM
  • 13. BREAK EVEN POINT
  • 14. RESOURCES FOR FINANCE
  • 15. INSTALMENT PAYABLE IN 5 YEARS
  • 16. DEPRECIATION CHART FOR 5 YEARS
  • 17. PROFIT ANALYSIS FOR 5 YEARS
  • 18. PROJECTED BALANCE SHEET FOR (5 YEARS)

Frequently Asked Questions

Sandwich panels are primarily used for roofing, wall cladding, and partitioning in buildings. They are widely applied in industrial halls, cold storage facilities, freezing units, office and administration buildings, and other structures where thermal insulation and rapid installation are important. Their composite construction combines external metal sheets with an insulating core, providing a combination of rigidity, load-bearing capability, and thermal performance.

A PUF sandwich panel is a composite building panel that uses rigid polyurethane foam as its insulating core. The polyurethane core is bonded between metal facing sheets, creating a lightweight and rigid construction element. PUF panels are used where thermal insulation is required, including industrial buildings, cold storage facilities, refrigeration applications, and building envelopes. The bonded structure also helps provide structural rigidity while reducing heat transfer through the roof or wall assembly.

Common sandwich panel insulation cores include polyurethane foam, mineral fibre wool, and polystyrene. Polyurethane and related rigid foam systems provide high thermal insulation, while mineral fibre wool can be selected where specific fire and acoustic performance requirements are important. The choice of core depends on the building application, required thermal characteristics, fire considerations, structural requirements, environmental conditions, and applicable technical specifications.

Polyurethane sandwich panels can be manufactured through continuous or discontinuous production methods. The process generally involves preparing the facing sheets, introducing the polyurethane system between the sheets, allowing the insulating core to form and bond, and controlling the panel dimensions and curing conditions. Discontinuous production can use different pouring and foaming methods, while continuous lines integrate several operations into a production sequence. Quality control includes checking panel dimensions, construction, and relevant physical and performance properties.

Polyols and isocyanates are the principal reactive components used to produce polyurethane materials. Polyols contain multiple hydroxyl groups, while isocyanates react with these groups to form polyurethane polymers. In rigid polyurethane foam systems, the reaction produces a cellular material suitable for thermal insulation. The formulation and processing conditions influence the resulting foam characteristics, including density, rigidity, thermal insulation performance, and suitability for applications such as sandwich panels and refrigeration insulation.

Continuous and discontinuous manufacturing differ mainly in how the panel production sequence is organised. Continuous lines integrate operations such as sheet handling, core formation, pressing, and cutting into a continuous production flow. Discontinuous production manufactures individual panels or batches using separate processing stages and methods. The appropriate system depends on production requirements, panel designs, product specifications, flexibility, equipment configuration, and the intended scale of operation.

Sandwich panels are suitable for cold storage facilities because their insulated core helps reduce heat transfer through walls and roofs. This supports the controlled internal temperatures required for refrigerated and frozen environments. The panels also combine insulation with a rigid composite structure and can be installed comparatively quickly. For cold-chain applications, panel selection should consider thermal performance, moisture control, joint detailing, surface materials, hygiene requirements, and the operating conditions of the facility.

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