Purofoam INT
Integral (Shell) Systems
Polyurethane foams can be rigid, flexible, semi-rigid or semi-flexible depending on the formulated polyol system used and the properties of the isocyanate. Foams whose internal structure is flexible and open-celled, whose shell is hard and partially stretchable are called INTEGRAL foams, briefly INTEGRAL PU (polyurethane). Integral polyurethanes are sometimes also called SEMI-RIGID PU foams. The most important properties of Semi-Rigid foams are shock absorption, quenching and absorption. For this reason, they are mostly used for vibration suppression and noise-sound isolation. Integral Polyurethanes are used in the production of final parts, just like in RIMs. The part that comes out of the mold goes either to the shelf or to the trash. For this reason, the trio of raw materials, molds and machines must be fully compatible. Undoubtedly, the mold release or in-mold paints must be chosen with the same precision. Integral polyurethanes are extensively used in the automotive industry and office furniture industry.
Scope of application
- Automotive industry (steering wheel, gear knob, armrest, bumper, door panels, engine hoods, etc.),
- Motorcycle / bicycle seat and accessories,
- Office chair armrests,
- Medical applications
Purofoam FLX
Flexible Foam Systems
Flexible polyurethane foams are obtained by polymerizing polyols with a single-stage diisocyanate in the presence of foaming agents. Polyethers and flexible chain polyesters are used as polyol component. The number of secondary hydroxyl groups and primary hydroxyl groups is important for cross-linking. For a typical polypropylene oxide triol, it is sufficient to add 100 parts of polyol to 46 parts of toluenediisocyanate.
Flexible foams are open-cell polyurethanes with limited flexibility and deformability. It is popularly known as sponge with its widespread usage. Low density sponges (13-40 kg/m³) are produced with slabstock technology in continuous lines, high density foams (40-80 kg/m³) are produced by molding method. In applications made with the molding method, the liquid polyol system and isocyanate are injected into the mold with the help of a machine. The foam formed as a result of the reaction takes the shape of the mold and has a flexible structure. Generally used isocyanates are prepolymers based on MDI or TDI. If the prepared polyol systems are not used with the recommended isocyanates, technical problems arise or sponges with the desired physical properties cannot be obtained. The products produced with these systems are elastic and malleable. Physical repellent agents are used, low emission and odourless systems. These flexible foams have high elasticity, compression set, rupture, elongation, tensile strength, low permanent deformation and non-flammability.
Scope of application
- Automotive Industry
- Furniture Industry
- Medical Industry
Purofoam HRD
Rigid Foam (Contunious) Systems
Purofoam HRD are systems that are mainly produced for the purpose of isolation (insulation), but that we encounter in many areas of our lives day by day. Rigid polyurethane foams are very similar in construction technique to flexible foams. The most important difference is in the polyol component used. Polyethers containing more than three hydroxyl groups per molecule are used to form the rigid structure. These polyethers are prepared by using substances such as pentaerythritol and sorbitol. If polyethers with three hydroxyls are to be used, their molecular weights must be very small. Thus, much higher crosslinking densities are achieved in rigid foams than in flexible foams. Diphenylmethane diisocyanate, which is less volatile than tolylene diisocyanate, can be used as the isocyanate monomer. The foams used in sandwich panels are shaped as a facade or roof in the section called lower and upper metal rollform. The shaped metal is heated before the application of the polyurethane by advancing at the top and bottom of the line. By applying polyurethane to the heated surface, it is conveyed to the saw section and packaged, proceeding on the press band where appropriate molds are placed according to the desired thickness.
Scope of application
- Building and Cooling equipment (hot water tanks, refrigerators, cold room warehouses, etc.)
- Sandwich panel (roof-facade panels)
- Wood imitation foam polyurethane applications
- Refrigerated safe and MOBO applications
- Building insulation
- Decorative products (interior and exterior coatings, jamb applications)
- Spray applications
- Furniture industry
- Medical applications
- Electrical applications
- Packaging foam
- Stone wool / glass wool adhesive
- Mini bar applications
- Solar collectors, combi boilers, boiler
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