Diamond paper is a high-strength insulating paper printed on both sides with diamond-shaped epoxy resin in stage "B" and is mainly used in the insulation of oil transformers .
The diamond-patterned resin coating melts at cooking temperatures and melts the layers of paper and conductors together, forming a rigid bond.
Prolonged heating of the coil during the normal cooking cycle hardens the resin so that the permanent resistance to internal heat can last throughout the life of the transformer.
Since the diamonds are spaced apart, the unprinted surface corresponds to 64%, in this way a secure adhesion of the insulation to the conductor is guaranteed .
Furthermore, the pre-preg resin of the diamonds crosslinks passing from the state B (pre-preg) to the state C (polymerized) firmly anchoring itself to itself or to metal parts with which it comes into contact, creating microchannels for the optimal circulation of the oil.
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