Polyurethane Insulation Panel, Flame Resistant PU Panel

Polyurethane insulation panels, commonly referred to as PUR, are frequently utilized as structural insulated panels within the construction industry. These panels are produced through a method known as uniform dispersion molding (UDM), which ensures consistent PU injection between the panel skins.

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Thermal Insulation

• The major advantage of polyurethane insulation panels is their exceptional thermal insulation properties. With a thermal conductivity coefficient of just 0.023w/m*k, these panels outperform almost all other foam materials available on the market.

• Moreover, the PU insulation panel is designed to be impermeable to water and various other liquids. Its skins are also laminated with a tongue-and-groove edge profile, facilitating straightforward connection and installation.

Features of Polyurethane Insulation Panels

• PU foam does not retain moisture, preventing the loss of R-values commonly associated with moisture absorption in fiberglass insulation (even 1% moisture can halve fiberglass batt R-value).
• Every panel is molded with a tongue-and-groove edge profile, ensuring rapid and accurate alignment at panel joints.
• Additionally, polyurethane insulation panels are connected utilizing a patented cam-lock system, which can reduce installation time by up to 30% compared to other structural insulated panels (SIPs).

Flame Resistant Polyurethane Insulation Panels

TOPOLO also offers a flame-resistant polyurethane insulation panel that complies with current energy efficiency standards while meeting European fire resistance benchmarks. These PU insulation panels are rated from F to B-s1, d0 in the Euro-class classification. We may delve deeper into the fire-resistant characteristics of PU in future discussions.

Applications

Polyurethane insulation panels find varied applications, including in building walls, cold storage facilities, and mobile panel structures.

PU vs EPS in Insulation

The debate over whether expanded polystyrene (EPS) or polyurethane (PUR) panels offer superior insulation has persisted for years. This discussion hinges on several factors that must be understood to arrive at a conclusive answer.

• INSULATION TYPES

EPS is a rigid, closed-cell foam made from hollow, spherical beads fused together via steam. Comprising 98% air, it is chemically inert.

Conversely, polyurethane insulation is created from a foam material that incorporates low-conductivity gas within its cells. This is achieved through a chemical reaction between a polyol (an alcohol featuring multiple reactive hydroxyl groups) and a diisocyanate or polymeric isocyanate, aided by various catalysts and additives.

• COMPARISON OF R-VALUE

Polyurethane boasts one of the highest initial R-values per inch in the market, surpassing EPS when comparing equivalent thicknesses. However, EPS insulation maintains its initial R-value for an extended duration after installation.

Polyurethane achieves higher initial R-values through the thermal resistance offered by its blowing agent, but it can lose R-value over time due to thermal drift. According to research by the Building Science Corporation, thermal drift describes the gradual loss of R-value in foam that contains captive blowing agents as air infiltrates the foam's cells, substituting the lower-conductivity blowing agent.

The most significant thermal drift in polyurethane typically occurs within the first two years. The Oak Ridge National Laboratory conducted research into the long-term effects of thermal drift on R-value, finding that within just 2-5 years, the thermal resistance of EPS and polyurethane insulation panels converges nearly to equivalence.

• COST COMPARISON

While polyurethane insulation panels come at a higher price than EPS foam panels, this cost accounts for the initial R-value advantage. Yet, the study from Oak Ridge National Laboratory demonstrates that this R-value diminishes with time due to thermal drift, and after five years, the long-term thermal resistance is comparable.

• FIRE AND MOISTURE RESISTANCE

TOPOLO's polyurethane insulation panels have undergone independent testing, yielding a one-hour fire resistance rating. Although EPS insulation is classified as combustible, it does not spontaneously ignite; rather, it behaves similarly to materials like wood or paper. Fire codes typically necessitate a fire barrier on the interior face of any wall, irrespective of insulation type, easily achieved by utilizing gypsum wallboard.

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