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Choosing the right rubber material depends on many different parameters: operating temperature, weather and ozone, contact media, dynamic load, 

The required function of the rubber roller and the prevailing conditions of use are the most important criteria for choosing the right rubber quality. Even the development of a new rubber compound can be necessary to obtain all the desired properties. Here we differentiate between the following properties (excerpt):

• MECHANICAL: hardness (Shore A, IRHD), tear resistance and elongation at break,  tear-growth resistance,  abrasion,  elasticity, compression set
• THERMAL: thermal conductivity, thermal expansion
• ELECTRICAL: volume resistance (insulating, antistatic, conductive)
• CHEMICAL: oil, fue, solvents, water, acids, alkalis

In collaboration with an external laboratory, we are able to assess the behaviour of a rubber compound in response to environmental influences or various contact media using a range of tests. These include, for example, the standard swelling test.

However, as laboratory conditions never prevail in practice – with many other influencing factors coming into play – we also have the option of using our roller test rig to test rubber rollers in liquid contact media under realistic, dynamic conditions. In this process, a pair of rollers is tested whilst rotating continuously within the contact medium.

The real-world conditions, for example of a CtP processor, can thus be accurately simulated.