Roofing PPU panel sandwich

Roofing a panel sandwich — the easy three-layer panels consisting from two external the zinced and painted sheets (covered with a protective film) and a heater layer from rigid polyurethane foam (PUR) of the European production with a density of 40-42 kg/m3.

It is known that today the most power effective heater applied in the construction and refrigerating markets is polyurethane foam (PPU, PUR). Coefficient of heat conductivity of this material of 0,022 W / m*k.

The PANEL CONSTRUCTIONS company offers wall and roofing a panel sandwich with thermal insulation from PPU (PUR) from which in short terms you will be able to construct or warm:

• shop, supermarket, mall;
• production, office building;
• logistic complex, refrigerating warehouse;
• climatic chamber;
• storage for vegetables, fruit;
• hen house, objects of agricultural purpose;
• service station, gas station, car wash;
• change house, protection post;
• the refrigerator, shop on wheels;
• the fast-built energy saving house, giving, garage, any other utility room.

Polyurethane (PPU, PUR) call the chemical polymeric compounds which are formed in result of reaction between liquid isocyanates and polyols. At a certain ratio of an isocyanate and polyol the rigid polyurethane foam (PPU) having porous structure with the closed cells filled with gas with extremely low heat conductivity turns out. Besides excellent heat-insulating qualities rigid polyurethane foam (PPU) has sufficient hardness and can maintain considerable loadings.

Technological process of production a sandwich of panels with thermal insulation from polyurethane foam (PPU) is divided into two stages. At the first stage the profile of sheet material with "thorn groove" locks is formed, at the second stage already under a press to be made filling of intersheet space a PUR panel sandwich by polyurethane foam which forms a heater layer. As thermal insulation only qualitative two-component polyurethane (PUR) of production Dow Chemical is used.

Unique characteristics of PPU:

• low heat conductivity of polyurethane foam (0,022 W / M*K) remains more than 50 years;
• low weight of PPU (40-42 kg/m3);
• high adhesive durability;
• environmental friendliness. On hygienic norms application in refrigerating equipment for food products is authorized;
• parovodonepronitsayemost;
• it is not subject to decomposition and rotting;
• does not collapse as a result of seasonal temperature fluctuations, an atmospheric precipitation;
• it is steady to aggressive (acid and alkaline) to Wednesdays;
• it is steady against influence of rodents and insects;
• it is steady against influence of a fungus and mold;
• good acoustic isolation.

Comparison of PPU with other heat-insulating materials

*** At a thickness of metal facings a sandwich of panels of 0.45 mm, PPU density - 42 kg/m3, density of mineral wool - 115 kg/m3, expanded polystyrene density - 50 kg/m3

As facing materials a sandwich of the PPU panels can be applied:

• rolled galvanized steel 0,45-0,6 mm thick;
• rolled galvanized steel with a polymeric covering polyester 0,45-0,6 mm thick;
• rolled stainless steel of the AISI304 brand (for foodstuff) or AISI430 (for nonfood products) 0,5-0,6 mm thick;
• paper with a density of 150-200 g/m2;
• folgirovanny paper;
• moisture resistant plywood or oriyentirovanno-struzhechny plate (OSB);