The production of polyurethane rigid foam sandwich panels has become a fundamental tool for high performance building systems.
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Although the processability between PIR and PUR panels is similar but with certain differentiating nuances, such as processing temperatures, higher in the case of PIR panels, or the use of adhesives to improve the adhesion between the sheet and the foam, in the case of PIR panels, although more and more PUR panels producers are also using an adhesive in certain panels to guarantee the adhesion between the sheet and the foam, the field of application of PUR/ PIR sandwich panels is very similar, and they can be used for:
- External enclosure: facades and roofs.
- Compartmentalisation of interior spaces: fire sectors, partitions, food processing rooms, clean rooms, cold rooms, etc...
Advantages of PUR/PIR sandwich panels
The advantages of
- Thermal insulation: It is one of the thermal insulation products with the lowest thermal conductivity coefficient. It guarantees the absence of thermal bridges thanks to the homogeneity of the insulation at all points of the panel. The assembly also minimises thermal bridges thanks to the joints, normally tongue and groove, between panels. Reduced insulation thickness thanks to the low thermal conductivity coefficient of the polyurethane foam.
- Optimisation of usable space, since a minimum thickness is required to achieve a maximum thermal insulation level.
- Virtually no water absorption due to the closed cell structure of the polymer, which makes them waterproof.
- Mechanical properties that give the panels great rigidity and low weight, which facilitates and economises transport, handling, installation and structural sizing. Ease of machining and cutting.
- Reaction to fire performance which makes PUR/PIR sandwich panels fire safe.
- PUR/PIR sandwich panels are a prefabricated product, sustainable in their manufacture and very light for transport to the construction site. The construction of a building, both residential and industrial, with polyurethane sandwich panels generates very little waste which makes the building process more sustainable. It is recyclable: the metal sheet is melted and the polyurethane is recycled using three techniques; mechanical recycling, chemical recycling or incineration with energy recovery. The insulating capacity of polyurethane sandwich panels helps to reduce energy consumption.
The advantages of PUR / PIR sandwich panels is what makes these insulation panels even more attractive for health, safety and environment:
Properties of PUR/PIR sandwich panels
In terms of properties, the main difference between PUR/PIR sandwich panels lies in their composition. The foam obtained with PIR (Polyisocyanurate) systems contains a high degree of aromaticity due to the formation of the polyisocyanurate structure, providing a higher thermal stability compared to urethane (PUR) groups, thus improving its fire resistance.
The PIR foam reacts safely to fire by forming a carbonised surface layer that protects and prevents the penetration of fire into the inner layers. In the composition of PIR panels, as a general rule, there is a lower concentration of flame retardants than in PUR panels, thus generating less smoke during combustion. There are even PIR panels on the market that are free of halogen flame retardants.
Even so, the products must be tested to determine their fire behaviour with the reaction and fire resistance test methods according to current regulations depending on the location.
In terms of thermal properties, PIR remains stable in a higher temperature range than PUR.
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Renewable and Recyclable Sourced Product Management
At Synthesia Technology we reaffirm our commitment to sustainability by promoting the circularity of materials and improving the environmental performance of our products, all to reduce our impact on the planet.
Since , Synthesia Technology has been using BIO-based raw materials from renewable resources and recycled PET in the production of polyols, a key raw material used in the manufacture of high-performance core insulation sandwich panels with PIR technology, demonstrating that it is possible to use plastic responsibly, recycling it into a new product that helps to reduce energy consumption and CO2 emissions, to the benefit of all.
Visit our website for the most important commercial references for PIR insulation systems for continuous lamination.
First of all, sandwich panels are widely used in construction, such as industrial plants, warehouses, cold storage, box packaging, light steel housing, original building mezzanine rooms, movable board rooms, various purification rooms, air-conditioned rooms, etc., which are a very suitable building material. So what is sandwich panel? let me tell you.
The sandwich panel is an insulated composite board formed by combining a color coated steel sheet or other panel and a bottom plate with a heat insulating core material through a binder (or foaming).
First, regarding the panel and the bottom plate, color coated sheets, galvanized sheets, plywood, stainless steel sheets, PVC, and the like are usually used. A color coated panel having a substrate that is hot dip galvanized or galvanized and an electro-galvanized substrate. The surface coating will not bend, the strength is high, the pressure is good, and it is more suitable for countries or regions with large rainfall or large snowfall. The color coating on the surface is beautiful and beautiful, which can prevent the substrate from corroding and falling off, which is better than the galvanized sheet. Stainless steel plate, good corrosion resistance, toughness is difficult to process; bonding effect is sometimes not good, need processing, the price is higher than color-coated plate or galvanized sheet; PVC foam board is mainly made of polyvinyl chloride (PVC), smooth surface Beautiful, lightweight, flame retardant, moisture-proof, soundproof, anti-corrosion, easy to cut, good weather resistance, acid, and alkali resistance. Alkali resistant and easy to clean. Due to the limited length of each component, the compactness of the plywood is not very good and it is difficult to solve the cracking phenomenon.
Secondly, regarding the main core material of the composite board, EPS, rock wool, glass wool, polyurethane and the like are commonly used. The foam board is made of expandable polystyrene (EPS) granules, which are shaped like chemical fertilizer granules, pre-expanded by heating, and become larger particles like white pearls, and then made into a micro-closed by heat-pressing in a mold. The foam structure of the whole structure has a better heat preservation effect and is relatively cheap, but the fireproof function is poor. Polyurethane, energy-saving performance, the high fire insulation performance of materials, the price is relatively high. The rock wool board is made of basalt stone as the main raw material. After high-temperature melting, the inorganic fiber is made from high-speed centrifugal equipment, and a certain proportion of the binder is uniformly added to be baked into a large plate. The rock wool strip is cut into rock wool according to the production needs. It is a non-combustible body with good fire resistance, and its price is higher than EPS but lower than polyurethane. Glass wool is a kind of light-weight, heat-resistant, elastic, and otherwise insulating material. It is widely used in chemical, pharmaceutical, factory, heavy industrial machinery and equipment, construction, vehicles, and aerospace. It is an ideal heat-dissipating, fire-proof and sound-absorbing material. Also, its price is higher than EPS but lower than polyurethane.
Now you know how to choose the right sandwich panel? If you are interested in the sandwich panels, please contact me.
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