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(1923 products available)
Sealants
Expansive PU polyurethane foam sealants are flexible and can be applied under varying temperatures. Sealants are often waterproof, airtight, and provide resistance to chemical action and fungal growth. Due to this property, they are suitable for windows, doors, and roof structures.
Systems Insulation
Systems insulation is a particular type of insulation that allows the building to hold the desired temperature and thus reduce energy consumption. This foam insulation is often sprayed in hard-to-reach areas like ceilings and walls.
Low-pressure adhesive
Low-pressure adhesive PU adhesives are used in the furniture and automotive industry. When applied, they expand at low pressure to form a firm bond. They are selected mostly due to their resistance to moisture and temperature, which enables them to operate under extreme conditions without degrading.
Two-component system
These systems consist of a resin and hardener that users mix fully before applying them. The product's final properties depend on how they are formulated, meaning suppliers can vary the foam to suit different needs. These are popular in construction for insulation and sealing and their variations in firmness.
Coatings
Coating PUs provide surfaces and materials with a protective layer. Their development is based on the versatility of the materials, which include water and UV resistance. These features make them particularly good at safeguarding structures. Since these coatings can be applied to various substrates, industries ranging from construction to automotive to retail use them.
Thermal Insulation
Expanding PU foam provides thermal insulation. It minimizes the transfer of heat, keeping buildings cooler in the summer and, conversely, keeping them warmer in winter. Insulation has become a standard procedure in modern energy-efficient construction.
High R-value
The foam has a high R-value, which is an indication of thermal resistance, thus sealing air leaks. The good sealing of air leaks means better energy efficiency since the conditioned air in a building remains conditioned.
Mechanical Strength
Expanding PU foam insulations are also noted for their compressive strength. This means that they can resist mechanical deformation. Their rigidity means that they can withstand pressures without collapsing. This property, therefore, provides long-term service protection to the structures.
Acoustic insulation
The foam has good sound absorption properties. They minimize sound transmission through walls, ceilings, and floors. Their effectiveness in this feature makes them ideal for use in theaters, recording studios, and other places where sound control is crucial.
Moisture Resistance
The closed cells in the expanding PU foam make it resistant to moisture. It is possible to have application areas in which condensation is prevalent, like roofs and basements. In such areas, moisture resistance means better durability and lesser chances of molds forming.
Building construction
In building construction, polyurethane spray foam is a conventional insulation material. Due to its expansive nature, it can fill gaps and cracks, providing a continuous insulation layer with minimal heat contact. This feature leads to improved energy efficiency in residential and commercial buildings.
Automotive industry
Polyurethane foam is widely used in the automotive industry. For instance, it is used in upholstery, cushions, and sealing applications. Expanding PU foam is usually applied in sealing gaps and cracks within the body structure. With its elasticity and ability to expand, it provides an airtight and watertight seal that improves the vehicle's insulation.
Furniture and bedding
Polyurethane foam is mainly used in the furniture and bedding industries. It is the foam used in sofas, chairs, and mattresses. The expanding PU foam is responsible for offering comfort and support by shaping the body's contour and returning to its original shape.
Aerospace
Polyurethane foam is used for thermal insulation and soundproofing materials in the aerospace industry. Due to its lightweight, varying density, and good insulating properties, the foam is well suited to meet the rigorous demands of this high-tech environment.
Packaging industry
The packaging industry uses expanding PU foam as a cushioning material. It is especially useful in protecting fragile items during transport. The foam can be molded to the product's shape, providing support on all sides and absorbing shock from impacts during handling and shipping.
Foam density
Buyers should consider foam density as one of the key factors in the expansion of PU foams. Generally, higher-density foams have greater structural strength and insulating capacity, while lower density foams are lightweight, with greater buoyancy. The intended application usually dictates the appropriate density.
Foam type
Buyers will find two main types of PU foams: open-cell and closed-cell foams. Open-cell foams are softer, more flexible, and more absorbent of sound. They are ideal for indoor insulation applications. Closed-cell foams are denser, more rigid, and provide better insulation and moisture barriers. They are suitable for outdoor and high-moisture environments.
Application method
The method of application will also be a determining factor for buyers when choosing the right product. Some expanding PU foams come prepackaged in aerosol cans for small DIY or home projects. Others are professional-grade foams, requiring special equipment to spray them for larger construction projects. Buyers should ensure they choose a product compatible with their application method.
Temperature conditions
Some PU foams are formulated to work best under specific temperatures. Buyers should look for foam that is suitable for conditions in their region for best results. If the intended application involves an extreme heat or cold condition, buyers should look for a formulation specifically resistant to such conditions.
Expansion ratio
Different expanding PU foams have different expansion ratios. Some formulations can expand up to 30 times their original volume. Expansion ratios play a key role when filling large cavities or small gaps. Buyers should look for foam with an expansion ratio suitable for their application to avoid wastage or insufficient filling.
Yes, expansive PU foam can be painted over. However, applying paint directly on the foam without appropriate preparation will result in a disadvantage. Most likely, the paint will either dissolve the foam or will not adhere well. To achieve better results, buyers should use a primer compatible with foam.
In most cases, the final result of PU foam application mainly depends on surface preparation. For better adhesion, buyers should clean and roughen the surface before applying the foam. There are also various primers and adhesives available that can improve adhesion.
Yes, exposure to UV light will cause PU foam to degrade over time. This is due to the fact that UV rays break down the chemical structure of the foam. They result in loss of insulation properties and integrity as well as discoloration. To prevent such degradation, experts recommend coating the foam with a protective layer.
Expansive PU foam has always been formulated for various applications. It includes construction tasks requiring insulation under high temperatures. Buyers should choose high-temperature formulations resistant to degradation under extreme heat.
The sealing capacity of expanding PU foam will reduce with time. It will also depend on the environmental factors it has been exposed to. Typically, hail, rain, and extreme temperatures will cause the foam to degrade faster. Generally, it's advised to inspect the foam every few years.
