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Press

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

Pertinax

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

COMPOSITES EUROPE 2011

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

FIEE ELÉTRICA 2011

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

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Direct request:

Enquiries from the United Kingdom:

Dr. Dietrich Mueller UK Limited

Tel    +44 7549 834830
Fax   +44 2476 996466

info.uk@~No~Spam~mueller-ahlhorn.com

 

Enquiries from all other countries:

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E-Mail: info@~No~Spam~mueller-ahlhorn.com

Let us know, which product you are
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Tensile behaviour

Tensile strength, elongation and tensile modulus describe the behaviour of a film under tensile stress. Chart 8 states typical values for GE films at room temperature.

Chart 8: Tensile behaviour at room temperature


These properties are important for the usage of adhesive tapes as well as at processing of films on rolls.

Tension and elongation

Tension-/elongation curves illustrate the short-term load capacity. Diagram 2 shows a typical curve with a definition of the parameter.


Diagram 2: Typical tension-/elongation curve



Tensions can be calculated with the help of fundamental technical equations for mechanical properties. They are based on Hooke's law of elasticity, therefore the tension acts directly proportional to the elongation in the linear region. Above the proportional limit the material behaviour differs from this constant.

According to Hooke, it applies:

E= σ / ε
Whereat: σ = Tensile strength (N/mm2)
E = elasticity modulus (N/mm2)
ε = Elongation (mm/mm)

Like most thermoplasts, Lexan®, Valox® and Ultem® also show a resilient behaviour at tensile strength in the area up to the proportional limit. That means that the films elongate and when the tensile is relieved, they return in their original status. The conjoined measurement differences should be considered during printing and/or die-cutting tense films.


This behaviour can be calculated relative precise or compensate with the help of this formula:

ε = F / A x E
Whereat: ε = Elongation (mm/mm)
F = Draw (N)
A = Cross-section area of the film (mm², width x thickness)
E = Tensile modulus (N/mm²), depends on the temperature

The value “E” changes with temperature.

Under tension a corresponding change of width can be quantified with the help of the Poisson ratio. This number is 0.38 for Lexan® and Valox® films (Ultem® films 0.42). When multiplied by the elongation from the above mentioned formula, it can be calculated how much the width minimizes.

Tear resistance

The tear resistance of a film complies with the needed strength until there are formation or distension of cracks generated. The tension is noted and the tear resistance or tear propagation strength is usually staten in Newton. It can also be phrased as strength per thickness. Maybe then it is not possible to state relevant comparisons between different materials and/or films of different thicknesses. Chart 9 mentions tear resistances, measured according to ASTM D1004 and ASTM D1925.


Chart 9: tear resistance and –propagation strength

Friction behaviour

Valox® films are an excellent surface material for numerous load-bearing applications because of their high smooth walls. Valox® also offers very low static and dynamic frictional coefficients in contact with metals. The static frictional coefficient of Valox® film is 0.39 measured according to ASTM D1894.

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