When using Stanyl in E&E applications one of the main functions is electrical
insulation. The insulating power of a thermoplastic can be expressed in
The material conducts current homogeneously, through the bulk or via
Related properties: volume resistivity
and dielectric strength.
The material breaks down and conducting paths are formed through the bulk
Related properties: breakdown voltage and
The surface is degraded gradually by the electric field, arcing and/or
contamination, and conducting paths are formed in the surface.
Related properties: arc resistance, high voltage tracking rate and
comparative tracking index.
Also heat formation, caused by above phenomena (or by other electrical
sources) may ignite the material.
properties: hot wire ignition and high-ampere arc ignition.
The combination of metal, insulating material, moisture and contaminants may
cause special chemical and physical degradation processes.
Related properties: electrolytic corrosion.
Effects of alternating current are polarization (loss of current and
electronic signal noise), related to the dielectric constant and
dissipation of energy (temperature rise), related to dissipation factor or
The exact levels of the electrical properties mentioned above depend on the
specific grade, temperature, and moisture content. In general these
properties are sufficiently retained at elevated temperatures to fulfill
critical application requirements. Detailed information is available in the
product databaseor the
In addition, Stanyl offers low and stable values for dielectric constants at
high frequencies which is key in designing today's IT
Moisture uptake may increase the dielectric constant, however this effect is
only seen at low frequencies and not at the high frequencies typically
encountered in current or future IT equipment (see graph below). DSM has
developed a Stanyl portfolio combining excellent performance for E&E
applications with outstanding long-term performance, including several
Low and stable dielectric constant of Stanyl at high frequencies.