What is a PU panel?

A sandwich panel is a structure made of three layers:

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• Core
• Two side skin

Sandwich panels are used in applications where a combination of high structural rigidity and low weight is required. The following is the list of the applications whereby sandwich panel is used:

• Cold Storage
• Pack Houses
• CA Chambers
• Ripening Chambers
• Freezer Rooms
• Clean Rooms
• Control Rooms
• Insulated Roofs
• Wall Claddings
• Partition
• Prefabricated Houses and shelters
• Portable Cabins
• Health Centers and Schools, Stadiums, Warehouses
• Communication Shelters
• Insulated Sheds
• Sub Zero Temperature Areas

PU Sandwich Panel:

Polyurethane rigid foam is the core in these kinds of panels. A special feature of polyurethanes is their method of production. Generally, metering and mixing four or more streams of liquid components containing polyurethane precursors at the processing stage produce polyurethanes. Thus, the final, high molecular weight polymer is normally manufactured by the manufacture of Sandwich Panel who has a PU sandwich panel production line. In the production line of sandwich panel, one section is dedicated to performing this process, called &#;PU Foaming Machine&#; or &#;Metering Machine&#;.

Polyurethane has been used as a considerably suitable thermal insulator since . Holding very high insulator properties, Polyurethanes result in energy-saving and consequently related charges up to %60. Since the use of fossil fuels gives birth to about %80 of the world&#;s carbon dioxide (CO2), therefore, use of polyurethane can be a suitable method for reducing energy consumption and, as a result, reduced CO2 gas as one of the most principal causes of global warming. Moreover, polyurethane insulator while holding higher efficiency in thermal insulation, it is considered lightweight and cost-effective compared to other thermal and cold insulators.

There might be questions about resistibility against fire; which is explained by the fire resistance rate. The fire-resistance rating means the duration for which a passive fire protection system can withstand a standard fire resistance test.

Tests according to DIN -1, fire behavior of building materials and building components. Classification of building materials according to EN -1:

• A Class: non-combustible materials &#; Test according to DIN EN ISO (non-inflammable classes)

&#; A1 Class: without organic content,

&#; A2 Class: with organic content

• B Class: combustible materials (such as textiles, furniture, and other interiors)

&#; B1 Class : Flame Retardant

&#; B2 Class: Normal Flammability (self&#;extinguishing)

&#; B3 Class: Easily Flammable (not usable in Industrial Buildings)

In most countries, the PU of the Sandwich panel must pass the classification of B2. The purpose of the test according to DIN -1: -05 section 6.1 is the classification of building materials (except floor coverings) on the basis of their fire behavior. The classification of polyurethane foam in a polyurethane sandwich panel is determined by the raw material used in the foaming machine when manufacturing rigid PU foam.

A sandwich panel with polyurethane typically consists of two sheets. The sheets could be PPGI (pre-painted galvanized iron, also known as pre-coated steel, coil coated steel, color coated steel coated by a hot dip zinc substrate), PPGL (pre-painted Galvalume iron, coated by a hot dip zinc substrate),  Aluminum sheets, and paper foils. The sheets are formed or in other words grooved as required by The Roll Forming Machine.

There are two production lines for manufacturing PU sandwich panels:

Manufacturing sandwich panel methods are mentioned above whereby machinery for manufacturing sandwich panels has significant differences.

In the continuous PU Sandwich Panel Line, the speed of production is almost 10 times more than the discontinuous PU Sandwich Panel Line. Furthermore, manpower required would be significantly reduced when using continuous PU Sandwich Panel machinery. In the Continuous Sandwich Panel, Line Rock wool sandwich panel can also be manufactured by extending the equipment.

PU Sandwich Panel Sizes and Types:

There are different types of PU sandwich which can be manufactured with both continuous and discontinues sandwich panel line:

• PU Wall Panel for Cold Rooms
  Typical Size of Cold Room Sandwich Panel: 120, 150, 170, 200 mm
• PU Roof Panels
  The number of Grooves can be selected / Typical Size of Roof Sandwich Panel: 40, 50, 60, 70, 80, 90, 100, 120 mm
• PU Wall Panels
  Typical Size of Wall Sandwich Panel: 40, 50, 60, 70, 80, 90, 100, 120, 150, 170, 200 mm
• Secret Fix Panels (hidden screw sandwich panel, boltless sandwich panel, and hidden joint sandwich panel)
  Typical Size of Secret Fix Sandwich Panel: 40, 50, 60, 70, 80, 90, 100, 120, 150, 170, 200 mm
• Solar Roof Panels
  Typical Size of Roof Sandwich Panel: 40, 50, 60, 70, 80, 90, 100, 120 mm
• Duct Panel
  Typical Size of Duct Panel Sandwich Panel: 20, 30 mm
• Board Panel
  Typical Size of Board Panel Sandwich Panel: 20, 30, 40, 50, 70, 100, 120, 150, 200 mm

Weight And Length Of PU Sandwich Panel

The two factors which determine the sandwich panel weight are:

1. The thickness of skin, previously mentioned that the sheets could be PPGI (pre-painted Galvanized iron, also known as pre-coated steel, coil coated steel, color coated steel coated by a hot dip zinc substrate), PPGL (pre-painted Galvalume iron, coated by a hot dip zinc substrate),  Aluminum sheets and paper foils.
2. The density of PU foam produced by metering or foam machine in the sandwich panel production line.

The length of the sandwich panel produced by continuous sandwich panel production depends on the usage requirements which could be a minimum of 0.5 meters to 22-meter long. Yet, sandwich panels are normally produced less than 12 meters for easier transportation and avoiding over-length cargo.

How Much Does It Cost?

The two main factors which determine the sandwich panel prices:

• The thickness of the sandwich panel
• The type and thickness of the skin

Therefore, the price of the sandwich panel will be different with every single specification and request. There is of course one more factor in sandwich panel prices; the country in which sandwich panel is produced. The raw material of sandwich panel could be available in some countries, so sandwich panel manufacturer can easily access the raw material, and sandwich panel might be lower in those countries whereas in some countries raw material for sandwich panel production might be imported (associated import cost to be added) and locally not available. As a result, the sandwich panel price will be higher.

Thermal Insulation of PU Sandwich Panel: 

Want more information on heat resistant materials for roofing? Feel free to contact us.

Thermal Transmittance or K-value is the rate of transfer of heat through a structure (which can be a single material or a composite), divided by the difference in temperature across that structure. The units of measurement are W/m²K. The K-value is determined by the thickness of the sandwich panel.

The below chart shows an example of approx. weight and K-value of the sandwich panel where 40 ± 2 (kg/m³) density of sandwich panel is considered consistent and PPGI for both sides of PU foam is 0.5 mm.

The thickness of the Sandwich panel line (mm) 40 50 60 80 100 120 150 200 Weight of Sandwich Panel  (kg/m2) 10.1 10.6 11 11.9 12.8 13,4 14.7 16,8 Thermal Transmission K-Value of Sandwich Panel (w/m2 K) 0.52 0.43 0.35 0.27 0.21 0.18 0.14 0.11

Comparing 30 mm PU Sandwich Panel with Other Materials in Equivalent:

 

Following is the List of Advantages of Sandwich Panels:

• Lightweight (resulting to save and use less material in buildings and reduced total costs)
• Low heat transfer coefficient
• Fire resistance class of B1 and B2 Low
• Installation cost
• Moisture insulator
• Sound insulator
• Appropriate mechanical features (against shear, tensile, and pressure forces)
• Low energy consumption (cooling and heating cost-effectiveness)
• High resistance against microbial and biologic contamination
• Product appearance and various color options

Gone are the days of thatched roofing and earthen tiles. Today, there are now a variety of roofing materials that abound in the market. These provide homeowners with both durable and inexpensive options, including the Polyurethane Sandwich Panel.

Polyurethane (PU) is a material found in everyday items such as refrigerators, automobiles, shoes, and even beds. It is a synthetic material with numerous applications. For example, the flexible foam used in mattresses is made from PU. It&#;s also utilized in shoe soles, tires, and furniture padding.

Its wide usage is due to the various advantages it provides. These include flexibility, high load capacity, strong bonding ability, and a cost-effective manufacturing technique. It&#;s also resistant to tears, abrasions, water, oil, grease, mold, mildew, and fungus. This has led PU to become frequently utilized in a variety of consumer and commercial products. Similarly, it is also used as roofing in the construction industry in the Philippines, particularly as a Polyurethane Sandwich Panel.

A Closer Look at the Polyurethane Sandwich Panel

The core of these panels is the polyurethane rigid foam. Polyurethanes are distinguished by their manufacturing process, as they are made by measuring and mixing four or more streams of liquid components containing polyurethane precursors during the production stage.

As a result, a high-molecular-weight polymer is often produced by a Sandwich Panel manufacturer through a PU sandwich panel production line. One section of the sandwich panel production line, known as the &#;PU Foaming Machine&#; or &#;Metering Machine,&#; is dedicated to this procedure.

Since , polyurethane has been utilized as a highly effective thermal insulator. Polyurethanes have excellent insulating characteristics, resulting in energy savings of up to 60%. Because the use of fossil fuels produces around 80% of the world&#;s carbon dioxide (CO2), polyurethane can be an effective way to reduce energy use. As a result, it can help decrease CO2 emissions, which is one of the most significant causes of global warming. Furthermore, polyurethane insulators are regarded as lightweight and cost-effective when compared to other thermal insulators, while having better thermal insulation efficiency.

Do you want to know more about PU Sandwich Panels? Read Revealing the Magic: How Insulated Panels Work

Polyurethane Sandwich Panel Uses and Applications

Polyurethane Sandwich Panels, often known as PU Panels, are structures consisting of polyurethane foam sandwiched between two side skins made of a different material, such as metal. Thermal insulation is provided by foam in between. The mix of materials allows PU to be lightweight, durable, as well as resistant to corrosion and extreme weather.

The three layers that make up the PU Sandwich Panel (the core and the two side skins) are used whenever a combination of high structural rigidity and low weight is needed. Some examples of its applications include pack houses, CA chambers, ripening chambers, freezer rooms, control rooms, insulated roofs, and wall claddings. They are also often used to build prefabricated houses and shelters, portable cabins, health centers, schools, stadiums, and warehouses.

Here are the other advantages of PU sandwich panels:

• Lightweight
• Fire resistant
• Has a low installation cost
• Can be a moisture insulator
• Can be a sound insulator
• Can withstand shear, tensile, and pressure forces
• Great for cooling and heating
• Has a high resistance against microbial and biologic contamination
• Can come in various color options and types

The Union Galvasteel Corporation&#;s Standard PU Panel

Union Galvasteel Corporation offers a wide array of products, including PU Sandwich Panel roofing. Our Roofing PU Panel and Standard PU Panel consist of a rigid foam insulation layer sandwiched between two structural metal skin surfaces. The core is made of Polyurethane and Polyisocyanurate insulated panels that form a strong bond to the outer skin, which makes the panels durable.

These panels are better than traditional wood framing and are less susceptible to shifting. These make them one of the best roofing materials for homes and commercial structures.

Installing our PU panels is easy and requires less time and manpower, as compared to other materials. They are also effective as thermal insulation, keeping the roof from absorbing too much heat. This means that you can save money as you will consume less electricity to cool your home.

Union Galvasteel Corporation is the market leader in the manufacturing and distribution of pre-painted and other galvanized roofing materials, as well as insulated panels for commercial, industrial, and residential use. Aside from these, we also have other insulated metal panels for sale, which means that we have the right materials for whatever type of structure you plan to build.

We have the largest and most diversified distribution network in the industry, with roll-forming plants, warehouses, and sales offices in strategic locations throughout the country. We ensure that we create only the best by hiring the top talent, adhere to operational excellence, and ensure that our technology is top-notch. We are relentless in exploring proactive ways towards improvement, which sets us apart from the rest in the field.

We started as a pioneer in the Philippine cement industry, but are now the market leader in the manufacturing and distribution of various roofing and building products. Learn more about our services or call these numbers for assistance: (02) --23, -, (049) 545- to 86, (Globe), and (Smart). We always seek to explore creative, innovative, and environment-friendly ways to push the boundaries in our industry.

Don&#;t forget to reach out to us to learn more about our products and services! We aim to help Filipinos build better lives, so that we may all proudly exclaim, &#;Sa tibay at ganda, panalo ka!&#;

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