Dielectric endurance of thermoset laminates

Conclusions drawn from these tests would indicate that for selecting thermosetting plastic laminates to be used as a dielectric medium, it is important to know the temperature at which the equipment is to be operated, the atmospheric conditions to be encountered, the mechanical strain and the dielectric stress to be applied. If the equipment is used under dry conditions and the mechanical strength requirements are not severe, paper-base laminates are very satisfactory. If humid conditions are factors it would be advisable to use the more water-resistant paper-base grades such as Grade XXXP and XXXPC. Under dry conditions requiring high mechanical strength it may be necessary to use a fabric grade such as LE and under continuous humid conditions requiring high mechanical strength it may be necessary to use Grade N-1. If are resistance is an important requirement Grade G-5 is indicated.