Polyurethane foam is one component, curing with moisture in air, expanding while curing, semi-rigid in aerosol form for installation, grouting and insulation material.
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Flexible Polyurethane Foams are used mainly for assembly of doors and windows, infilling applications, sound and heat insulations, waterproof barriers and insulation against fire. Polyurethane Foam reacts rapidly with moisture in the air and expands after application. Polyurethane bonds extremely well to the surfaces applied thanks to its high adhesion power.
Where are They Used?
Door and window assembly is the most effective usage areas of PU Foams. It is used for the insulation of electricity installations, hot and cold water pipes, adhesion of roofing tiles, tightness of terraces, concrete shear wall buildings, industrial roof insulation, cold storage houses and ice plants, decks of ship and yacht, filling of the voids between external thermal insulation materials, adhesion of insulation materials, filling of the voids and insulation of dry food storages.
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How is it Used?
straw and pistol apparatus are screwed on the valve installed on the tin. The canister is shaken vigorously for 20 minutes and apply pressure to the trigger of pipet or pistol by holding it upside down. How strong the pressure is the output is so intensive. The foam is always applied from downward to upward for vertical surfaces. Take care that temperature of ambience and canister should remain in the range given in product TDS during application.
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What are the PU Foam Types?
Polyurethane foams may be divided into two sections depending on its application type and purpose.
1- PU Foams according to their Application Type;
Foams with Straw: It may be called as type of most frequent and best seller foam in the market. It is used with the straw apparatus supplied with each canister. It is preferred for filling broad voids (average 200% - 250%) due to its high expansion rate. Akfix Maximum PU Foam 805, 940, 806, 840, 820 coded products are preferred for the foam applications with straw.
Foams with Pistoles (Professional): It is used with a special application gun. The product mostly addresses the professionals. It is preferred to fill relatively narrow voids due to its low expansion rate (average %0%-60%). Akfix foams with guns having codes of 805P, 850, 840P, 820P offer an effective solution for filling small voids.
2- PU Foams in Accordance with Their Intended Use;
Foams for Filling Voids: It is standard and most frequently used foam type.
Adhesion Foams: These are the foams having increased adhesive property due to having very low (minimal) expansion rates compared to standard foams and denser polymer. Heat insulation materials like EPX, XPS, aerated concrete, brick and different construction materials like marble may be bonded with these products. For these group of products; Akfix 960, 960P, 962P coded products are preferred.
Contribution of Polyurethane Foams to Sound, Heat and Water Insulation;
It is required to apply PU Foam accurately for a good insulation.
Sound Insulation
They are used for filling voids between materials used for sound insulation, door and window voids, preventing passing of sound, heat and air, insulation the environment of the vent ducts, chimneys and climatic units protruding from the buildings and many more similar fields.
Heat insulation
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2 components rigid (strong) foams are preferred for heat insulation. Akfix 812 PU foam developed for low temperatures - like 25° C degree and Akfix 885 PU Foam for up to -25° C degree temperature ensure a perfect heat insulation even under very challenging conditions.
Water insulation
Water can in no way damage the foam that is properly applied and cured completely. One component polyurethane foams are preferred for external environment applications, decorative pools, attaching decorative stones to each other, preventing water leakage from joints of the mechanisms like climatic units on caravan type vehicles and antennas. Akfix polyurethane foams provide long life and effective solution for sound, heat and water insulation applications.
Frequently Asked Questions
How long the structure stands as long as it does not expose intense UV lights. UV lights cause deformation of the foam corrupting its structure. Dried foam can be protected from hazardous lights by painting surface.
Rigid foam is applied to roofs of buildings and have a perfect heat insulation capability. One living on the top floor does not feel moisture, humidity and therefore molding in case if there is no point in another place that may create thermal bridge.
There are fire resistant foams in fire classifications of B1 and B2 according to German Standard DIN and these products resist against the fire for a certain time when exposed to flame directly or remain in a place where fire continues. Akfix B1, B2 Foams resist against the fire up to 217 minutes. Akfix 820, 820P, 840, 840P coded foams are preferred among fire resistant products.
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The most practical way to clean wet foam is to use foam cleaner. The foam that is contaminated around during application may be removed from all building materials, skin, textile products by spraying foam cleaner on it before it gets dried. It is possible to clean foam residues easily with Akfix 800C foam cleaner. Acetone can also be used in case where foam cleaner is not available. Cured foam can only be cleaned by mechanical ways like utility knife etc.
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Which Names Are They Referred By In The World?
Names commonly used in the market; one component pu foam, polyurethane pu foam, OCF pu foam sealant, gap filling pu foam, window assembling pu foam, mounting pu foam, montage pu foam, heat insulation pu foam, sound isolation pu foam, door assembling pu foam, Insulation foam, construction foam.
Flexible polyurethane foam is used as cushioning for a variety of consumer and commercial products, including bedding, furniture, automotive interiors, carpet underlay and packaging. Flexible foam can be created in almost any variety of shapes and firmness. It is light, durable, supportive and comfortable.
Flexible polyurethane foam accounts for about 30 percent of the entire North American polyurethane market, and is used largely for bedding, furniture and in the automotive industry.
Rigid polyurethane and polyisocyanurate (polyiso) foams create one of the world's most popular, energy-efficient and versatile insulations. These foams can significantly cut energy costs while making commercial and residential properties more efficient and comfortable.
According to the U.S. Department of Energy, heating and cooling account for about 56 percent of the energy use in a typical U.S. home, making it the largest energy expense for most homes. To maintain uniform temperature and lower noise levels in homes and commercial properties, builders turn to rigid polyurethane and polyisocyanurate foam. These foams are effective insulation materials that can be used in roof and wall insulation, insulated windows, doors and air barrier sealants.
The uses of polyurethanes in the coatings, adhesives, sealants and elastomers (CASE) market offer a broad and growing spectrum of applications and benefits. Polyurethane coatings can enhance a product&#;s appearance and lengthen its lifespan. Polyurethane adhesives can provide strong bonding advantages, while polyurethane sealants provide tighter seals. Polyurethane elastomers can be molded into almost any shape, are lighter than metal, offer superior stress recovery and can be resistant to many environmental factors.
Thermoplastic polyurethane (TPU) offers a myriad of physical property combinations and processing applications. It is highly elastic, flexible and resistant to abrasion, impact and weather. TPUs can be colored or fabricated in a wide variety of methods and their use can increase a product's overall durability.
TPU is an elastomer that is fully thermoplastic. Like all thermoplastic elastomers, TPU is elastic and melt-processable. In addition, it can be processed on extrusion, injection, blow and compression molding equipment. It can be vacuum-formed or solution-coated and is well suited for a wide variety of fabrication methodologies. TPU can provide a considerable number of physical property combinations, making it an extremely flexible material adaptable to dozens of uses such as construction, automotive and footwear.
Car bumpers, electrical housing panels and computer and telecommunication equipment enclosures are some of the parts produced with polyurethanes using reaction injection molding (RIM). Adding design flexibility, the polyurethane RIM process produces parts that are usually not achievable using typical injection molding processes, such as thick- and thin-walled parts, encapsulated inners and foamed cores. In addition to high strength and low weight, polyurethane RIM parts can exhibit heat resistance, thermal insulation, dimensional stability and a high level of dynamic properties. Automotive, construction, appliance, furniture and recreation and sporting goods are a few of the markets and applications using RIM technology.
Polyurethane binders are used to adhere numerous types of particles and fibers to each other. Their primary areas of use are in the manufacturing of wood panels, rubber or elastomeric flooring surfaces and sand casting for the foundry industry. The highest volume application for polyurethane binders is in the manufacture of Oriented Strand Board (OSB). These wood panels are used in structural sheathing and flooring, manufactured housing, joists and beams and shop panels. Rebond carpet underlay uses polyurethane binders to adhere scrap pieces of foam, which are often flexible polyurethane foam, together in its production.
Waterborne polyurethane dispersions (PUDs) are coatings and adhesives that use water as the primary solvent. With increasing federal regulation on the amount of volatile organic compounds (VOCs) and hazardous air pollutants (HAPs) that can be emitted into the atmosphere, PUDs are being used in more industrial and commercial applications.
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