The process of covering involves attaching attractive decals (laminates) to a broad variety of component surfaces. This allows a wide range of different fabrics and surface weights to be attached to complex surfaces. The support parts and decal materials are bonded together using specially adapted adhesives. Our covering experts are able to cover difficult contours and tight radii in either a single step or with minimal reworking. This technique is used for parcel shelves, convertible soft tops, trunk covers and inserts.

Our processes allow us to manufacture components that meet the highest standards in terms of rigidity and temperature resistance while still managing to save on weight. Typical applications include self-supporting parcel shelves, convertible top compartment covers for cabriolets, and trunk floors for SUVs and convertibles. The process involves spraying honeycomb boards and fiberglass with PU before pressing them together. Several production stages later, the result is an extremely rigid sandwich construction with maximum load-bearing capacity and a very low weight thanks to the honeycomb core. What’s more, these honeycomb boards also offer a higher level of dimensional stability in comparison to conventional systems.

The thermoforming process involves producing visible parts for interiors and acoustic parts for the engine compartment. In the case of the visible parts for interiors, PUR recycled material, honeycomb boards, and natural and glass fibers are combined with thermoplastic or duroplastic materials and decorative fleeces. This technique is used for items such as parcel shelves, trunk components, and roller blind encapsulations.
Acoustic parts are made of either PUR foam or a combination of natural fiber, PUR foam, and duroplastic materials. This technique can be found in hood linings and encapsulation parts for engines and transmissions.

This process involves molding PUR recycled material (foam cut-outs) with bonding agents using pressurized and heated tools.
The advantages of composite foam can be found in the complex (3D) shapes it is capable of forming, not to mention the cost benefits afforded by the use of secondary raw materials. What’s more, its open-cell structure usually means composite foam is a better option than more recently developed foam types when it comes to acoustic effectiveness.
Greiner uses punching to manufacture a wide range of different damping parts and absorbers. This process involves punching out preset shapes from soft or recycling foam boards.
These punched parts are often used as damping parts on parcel shelves.