Hot melt adhesives for Adhesives for the production of composite panels

Main features

Lamination of flat panels

Sandwich panels

For the production of composite and honeycomb panels

Applicable with both Slot Nozzle and Roller Coater

Adhesives for the production of composite panels

Composite panels, also known as sandwich panels, are becoming increasingly popular, especially in the industrial construction industry. They form a cost-effective alternative to conventional building materials and offer numerous construction and installation advantages in various fields of application. For example, they can be installed as cladding for walls and roofs and are accompanied by improved heat and sound insulation. Therefore, they are used especially in lightweight construction for industrial, storage, sports, entertainment or commercial buildings. Other areas of application include shipbuilding, rail vehicles, flooring, partition walls, furniture and much more. Thanks to their thermo-insulating properties, composite panels are also used in the construction of cold stores and rooms with reduced temperature.

Advantages of composite panels

The biggest advantage of composite panels is certainly the wide range of applications. Sandwich panels can be installed vertically as well as horizontally and are characterised by quick and easy installation.
Sandwich panels are available in a wide variety of sizes and also shapes. They can also be laminated with a wide variety of decorative foils to create visually appealing facades and interior walls. This means that there are no limits to the creative design of architects and builders.
Thanks to the lightweight construction of the composite panels, they have a low dead weight but at the same time offer improved heat and sound insulation compared to conventional building materials. When high-quality materials are used, the composite façade panels can also contribute to fire safety, as the panel core is usually made of non-combustible or only flame-retardant materials such as mineral wool, PUR foam or polystyrene.

Production of composite panels and honeycomb panels

Sandwich panels owe their name to their layered structure. As a rule, it consists of an outer cladding made of metal, such as steel sheets or plastic panels made of PVC, and a core formed of different materials depending on the area of application. A multilayer core made of materials such as mineral wool, polyurethane foam, polystyrene and others acts as a thermal insulator. However, the core can equally be made of aluminium honeycomb, polycarbonate, polyetherimide and polypropylene honeycomb, PVC foam, etc.
Reactive polyurethane hot melt adhesives are characterised by a wide adhesion spectrum and therefore this variety of materials can be processed to produce composite panels with the desired sizes, thicknesses and fillings.
As a rule, PUR adhesive is heated in special drum melters before processing and then applied to the panels by roller application. The layers of material are placed on the open adhesive layer and then pressed in a calender. The great advantage of PUR adhesives for the construction industry is that they are free of formaldehyde and enable a linear continuous production process with high production output. This is because there is no standing time in static presses. Different materials, sizes and quantities can be flexibly realised in the same production line, so that order-based production (“on-demand”) is possible to reduce storage volume.
At the same time, PUR hotmelt adhesives guarantee durable and resilient bonding, as they are characterised by high temperature and moisture resistance. Composite façade panels are continuously exposed to the weather and therefore the adhesive must meet the highest requirements.
Depending on the production process and the technical equipment of the line, certain parameters must be adhered to. Therefore, it is particularly important to choose the right PUR adhesive for the production of composite panels and honeycomb panels to ensure a process-safe and high-performance production.
If you have any questions or problems with the production of composite panels, sandwich panels or honeycomb panels, please contact us and we will be happy to advise you on how to optimise your production and possibly even reduce your material consumption.