KLIMA-PUR® is a high-performance window system made of bioPolyurethane (BioPUR), designed for energy-efficient and sustainable construction. The material combines outstanding thermal insulation (Uf ≤ 0.8 W/m²K) with excellent acoustic damping and high dimensional stability, outperforming traditional PVC, aluminium, and timber frames.
Its dense microcellular structure and low thermal conductivity result in superior envelope performance and long-term durability (30–40 years), while maintaining a lightweight design. KLIMA-PUR® profiles are fully recyclable, enabling circular manufacturing and reducing embodied carbon compared to fossil-based alternatives.
Product development
To develop the optimal bio-based polyurethane (bioPUR) foam and window frame, the Design of Experiments (DOE) is structured to optimize key performance metrics, including thermal conductivity, density, fire resistance, and processability.
The five formulations were assessed based on considerations such as polyol compatibility with other biobased polyols, average functionality of the polyol phase, which represents the average number of reactive sites per molecule and influences crosslinking density, viscosity, bio-based content, and ease of processing.
Tests
– Free Foaming Test (Open Mould)
– Plate Moulding Test (Closed Mould)
– Hardness-temperature resistance evaluation
– Thermal Conductivity Tests
– Fire Resistance Test
– Integration of Recycled Filler
Product safety
KLIMA-PUR® profiles are made of bioPolyurethane (BioPUR) material free from hazardous substances such as foaming agents, plasticizers, or heavy metals. The product is manufactured using aromatic isocyanates and renewable polyols, resulting in a low-VOC formulation that ensures safe indoor air quality and compliance with REACH and RoHS regulations.
During handling and installation, no particular hazards are expected under normal conditions. Standard personal protective equipment (gloves and safety glasses) is recommended when cutting or machining the profiles. In case of fire, carbon monoxide (CO) and carbon dioxide (CO₂) may be released as with any organic polymer. Firefighting measures should use foam, CO₂, or dry chemical extinguishers.
Waste and off-cuts can be mechanically recycled or chemically reprocessed into new BioPUR components, contributing to circularity and minimizing landfill disposal.