Insulating rubber kraal pad appearance, inspection norms, rounding a 1.
Spot mark depth and height is not beyond 2 rubber sheet thickness and service.
Bubbles per square meter, area of less than 1 cm are no more than 5, bubbles between arbitrary two bubble spacing not less than 40 mm.
Depth of impurities or rubber sheet thickness and length of 1/6 April.
Edge is not neat or shape of the surface width is not beyond 10 mm, length is not beyond the rubber sheet 1/10 of the total length of 5.
There is no crack, hardness (
Shao Er A)
: 55 -
70 three, tensile strength and elongation at failure: tensile strength (
0 250% elongation at failure acuity four, set out (
Permanent deformation of 25% or less, hot air aging (five
Six: tensile strength decline of 30% or less, absorbent 1 or less.
Seven, electrical insulating function experiment: 5% voltage resistance experiment 1:25 kv (
Should be no breakdown scene, stick to 1 min, 2 breakdown voltage 35 kv (or experiment