Quantitative Analysis of Ageing Condition of Insulating Paper Using Infrared Spectroscopy

Table 1

Ageing processes for different types of kraft paper.

Kraft paper	Ageing process
Dennison 22HCC (0.076 mm)	In oxygen saturated mineral oil at 130°C. Experiment time: 912 hours.
Manning 220 (0.063 mm)
Dennison 22HCC (0.076 mm)	Thermal ageing using an oven at 124°C. Experiment time: 110 hours.
Manning 220 (0.063 mm)
Dennison 22HCC (0.076 mm)	In oxygen saturated mineral oil at 124°C. Experiment time: 712 hours.
Manning 220 (0.063 mm)
Cottrell (0.076 mm)
Dennison 42HCC (0.127 mm)
Dennison 22HCC (0.076 mm)