UL-approved GRP profiles

Various of our GRP profiles are also available in UL-approved versions.

This ensures our customers easier approval in their UL system and enables them to open up additional markets.

the dr Dietrich Müller GmbH mainly supplies profiles that are used as insulating profiles in all areas of electrical engineering. Our profiles are used in particular in transformer construction as a dogbone and as a corner profile, as well as in electrical engineering as a slot wedge.

The UL approval is of particular importance here.

Reinforcement of the GRP profiles

In principle, all GRP profiles are cross-reinforced with glass fiber mats. Longitudinal forces are absorbed by rovings (unidirectional glass fibres), which are arranged in the core of the profiles. The profiles are equipped with a surface fleece for improved UV and weather resistance.

Manufacturing process for GRP profiles: pultrusion

The pultrusion process is a continuous manufacturing process in which reinforcing fibers (we focus on glass fibres) are impregnated with a thermosetting resin. Polyester and epoxy resin systems are used as resin systems in our production.

The glass fibers impregnated in the resin are fed to the heated tool according to the profile geometry. Curing takes place in the tool.

The GRP profile is pulled continuously through the tool with a trigger and cut to size with a saw.

Tools for manufacturing GRP profiles

In our tables you can see which tools we have already created. New tools are constantly being added. So if you need other dimensions, please send us an inquiry.

Applications for GRP profiles

Electrical engineering:

Groove wedges, groove head inserts, clamps, bandage rings, holding blocks, strips

transformer construction :

Rods, cooling channels, tie rods, supports, covers, air gaps, winding bodies

Switch construction:

Shift rods, tie rods, push rods, spacers, fasteners

General electrical engineering:

Terminal strips, antenna masts, brush holders

peel off tissue

It is also possible to roughen the surface of the GRP profiles with a tear-off fabric so that they can be glued more easily.

Machined parts from GRP profiles

Of course you can also buy machined parts made of GRP profiles from us. These can then be installed as ready-to-install insulating parts should be used.