1. Tensile strength: When the insulating board is subjected to tensile load, it must be able to withstand the stress without being broken
2. Punching strength: A measure of the ability to withstand pressure without being broken.
3. Tear strength: The force required for tearing is required to meet the corresponding specifications.
4. Toughness: It is the strength of the folded or insulating board that can meet the corresponding requirements when it is bent. To determine the performance of solid insulation, you can try to sample and measure the degree of polymerization of paper or cardboard, so as to analyze whether the solid insulation is touched or whether there is low temperature overheating that causes local aging of the coil insulation when there is a fault in the transformer, or to determine the aging degree of the solid insulation.