Presentation: The main characteristics of an insulator 

Dimensional 

• The main dimensional characteristics of an insulator
  
• Thickness
  
• The main surface to be as smooth as possible for low-friction insertion in automatic processes
  
• Grammage or surface density and yield
  
• Resin rates, mainly applicable to tapes

Mechanical

• Rigidity: difficult to characterise, a requirement for automatic insertion, as opposed to manual.
  
• Tearing (pre-scored or not) in respect of automatic insertion or motor/alternator lead-out finishing operations (trimming off of the insulation coming out of the slot).
  
• Traction in a longitudinal or transverse direction is the parameter that measures aging over time.

Thermal 

• Electrical insulation, with good mechanical properties, it must have as high a thermal conductivity as possible.
  
• A rise in temperature must not alter any of its dielectric or mechanical properties.