Competence and experience
with engineering plastics

Whether semi-finished products, tailored blanks or machined components. We are your partner.

This Website is currently under construction.

GTP German Thermoplast GmbH has been firmly established in Schwentinental near Kiel for many years now, where it has specialised in the extrusion and processing of high-quality thermoplastics. We supply a wide variety of customers from a vast range of industries and regions with semi-finished products and machined components.
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Tradition and innovation

With our distinct entrepreneurial spirit, we shape our future on the basis of our tradition as a former family company.

Competence and experience

With our roughly 60 years of experience, we offer customers an extensive portfolio of different products and services.

Proximity to markets

We put our customers at the centre of everything we do and nurture trusting, sustainable partnerships.

Our services


With our 19 extruders, we are capable of producing round bars, hollow rods and sheets in a diverse range of sizes.


Our semi-finished products are subjected to a tempering process in order to guarantee optimum dimensional stability.

Cutting service

If you require your semi-finished product in specific dimensions, we would be happy to cut it to size for you.

Prefabricated part machining

Looking for prefabricated products? We will be happy to prepare these for you using our machinery.

Our product portfolio

Our delivery programme offers a wide selection of semi-finished products made of thermoplastics, either cast or extruded. Many products are available for you in stock. You select the shape, colour, dimensions and desired material.
We will be happy to advise you on choosing the right materials.

Here at GTP German Thermoplast, we give shape to plastic.