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Discover now our wide-ranged job offers and have a carreer at Dr. Dietrich Müller. We are looking for:

  • Wholesale and Foreign Trader
  • Graduated in Electrical Engineer


PCIM Europe Nuremberg 2015

Thermally conductive pad: Thermipad TP 22715 with 15 W/mK

SPIE Smart Structures/NDE conference

Electronics & Components Hong Kong

Imports and exports of the electrical industry


InnoTrans Berlin

World Energy Engineering Congress Washington

Enova Paris

International Electric & Automation Show Bucharest

CFRP profiles

Energie Impulse Aachen

Water-jet cutting

 CWIEME in Berlin 2013

Coil Winding 2013

Thermiglue TL 23010

Coil Winding 2012

CWIEME Berlin 2012

Italian bobbin manufacturer

Working hours

NEC Birmingham UK

Advanced Engineering UK 2011

Clean Energy Expo Asia 2011

Contract 4S iPhone protectors


Electric Drives Production Conference

MOTEK 2011 and Bondexpo

IAA 2011

Norton TH

ArpaxX-Aramid Paper

Slot insulation material

Bern and public transport

Germany with great opportunities in the field of electric cars

Stamp parts from Valox for the lighting industry

Thermal management for LED – Applications

APTIV films are available as a new high performance materials

ArpaxX - push up the heat: Dr. Dietrich Müller GmbH

ZVEI: The Electrical Industry expects that the boom will continue in 2012

Lectures at the CWIEME Berlin 2011

CWIEME Berlin 2011: Dr. Dietrich Müller GmbH with a large product range

Increased Growth Forecast for the German Electrical Industry

Hannover Messe CoilTechnica:  A Good and Positive Response for Dr. Dietrich Müller

Delivery situation in Japan

FIEE: A resounding success for Dr. Dietrich Müller


Dr. Dietrich Müller: Punched parts made ​​of 3M VHB Tape

Dr. Dietrich Müller: Nomex® parts in self-adhesive version.

Dr. Müller GmbH CoilTechnica, Hannover.

MT in different varieties and Thermiflex

Dr. Müller GmbH: New product for the solar industry

Dr. Dietrich Müller registered as a UL – „Repackaged Recognized Components“ Company.

CWIEME Berlin 2010: Dr. Mueller in Ahlhorn

Dr. Mueller: High technology and innovation at one time in one venue

Dr. Müller GmbH continues its leadership as a supplier of Ultem films

Dr. Müller GmbH: New product line for films release

Dr. Müller proud of the opening of the Germany's first offshore wind park

Müller and Temac: Distribution agreement sealing materials

Get involved with the latest insulation product offerings at the Coil Winding 2010 – Dr. Müller GmbH


Direct request:

Enquiries from the United Kingdom:

Dr. Dietrich Mueller UK Limited

Tel    +44 7549 834830
Fax   +44 2476 996466


Enquiries from all other countries:

Tel: +49 4435 971010
Fax: +49 4435 971011

Let us know, which product you are
looking for and we will give you the
adress of the right distributor.



ArpaxX Aramid paper

(Ahlhorn, 15.07.2011)

ArpaxX – push up the heat

Nothing is so good that it can not be further improved and optimized. The ArpaxX series brings Dr. Dietrich Müller GmbH a completely new generation of premium Aramid Paper on the market that sets technology standards in all respects, from manufacturing to customer use.

Aramid paper and boards are essential materials in building modern insulation systems in electrical engineering, due to the outstanding physical properties of the all-rounder in insulation techniques, used for example in electric motors and generators (slot insulation, ground insulation and phase insulation), and in transformers (layer insulation, moldings, spacers, cylinders, end rings, moldings, etc.) and many other fields of electrical engineering. In particular, with the high temperature resistance of the material, it is thanks, if used extensively, that with the use of ArpaxX papers and boards the life of electrical appliances is increased significantly and the premature failure rate can be reduced to an absolute minimum.

High flexibility with „adjustable“ dialectic strenght and a wide range of paper and board thicknesses.

This new product line of Dr. Dietrich Müller GmbH is developed and produced in Germany. The production process is characterized by high flexibility,and depending on the requirement, the optimal composition of fibers and binders can be calculated though a specially developed mathematical-physical model with the dielectric strength set to the individual customer requirements.

Also ArpaxX sets new standards, whereby a much wider range of individual paper and board thicknesses can be realized. Thus, the minimum Aramid paper thickness is 0.025 mm, while the possible maximum thickness of calendered aramid boards of 50 mm is an increase equal to five times when measured against the previous standard. The ArpaxX series is also characterized by a heat resistance of up to 275 ° C, a dielectric strength of 40kV/mm, maximum heat shrinkage at 1.0 percent, and a thermal conductivity of 0.25 W / mk. Special papers can be manufactured with a dielectric strength of up to 80 kV / mm.

Quality „Made in Germany“ – also for environmental reasons

To improve the quality of the material, the production process was also optimized. It succeeded in developing ArpaxX to reduce, contamination by foreign substances, nodules, and air entrapment to an absolute minimum, which has significantly improved the homogeneity of the aramid paper with all the related positive benefits that follow.

By producing in Germany, the usual high standards apply here in terms of sustainability and environmental protection. For the sake of the environment, special emphasis was placed on a closed water cycle in the production process. Since the calendering is carried out purely by mechanical means and avoids aggressive industrial adhesives, ArpaxX products are fully recyclable. The specially developed mathematical and physical model for calculating the individual fiber-binder ratio also leads to significant material and cost optimization.

These are the three types in the ArpaxX Aramid Paper series:

ArpaxX L

The aramid paper is specially designed for the production of laminates, which are used in the insulation of motors, transformers and generators. The product can be of the calendered variety in thicknesses of 0.05 - 0.08 - 0.13 - 0.18 mm. Availability in the uncalendered version is in thicknesses of 0.13 and 0.18 mm.

 ArpaxX N

Papers and boards from ArpaxX N can be used directly as surface insulation in all known application areas. Their use extends across AC and DC motors up to large generators in power plant technology, where it can be used in wet and dry transformers and chokes.

The calendered version is available in rolls of thickness 0.025, 0.040, 0.050, 0.080, 0.130, 0.180, 0.250, 0.300, 0.380, 0.450, 0.510, 0.610, 0.630, 0.650, 0.760 mm. Uncalendered we offer rolls in thicknesses of 0.130 mm, 0.180 mm, 0.250 mm, 0.380 and 0.580 mm.

As a low-density, the board's thicknesses are 1 - 4 mm, as a medium-density 1 – 10 mm and as a high density 1 – 20 mm, each made in 0.5 mm increments.

ArpaxX S

For papers and boards in this category, there is no specification - for that you decide. In ArpaxX S are paper and boards, which are developed by us for special applications. Thus, for example papers are produced which have the same thickness with a 50 percent higher dielectric strength than ArpaxX N.

These special compositions are suitable for your individual scalable properties, ideal for use in wind power generators, for drives in the field of electric vehicles and the manufacture of honeycomb materials in vehicle construction.