ELECTRICAL INSULATING PAPER

The present invention includes 40 to 80 wt.% of aramid fibrid， 10 to 50 wt.% of aramid pulp， and 10 to 50 wt.% of aramid shortcut， wherein the aramid pulp has a length of 0.5 to 6 mm and 15 to 85 It relates to an electrical insulating paper， which is a para-aramid pulp with Schopper Riegler. Preferably， the fibrid is a para-aramid fibrid and/or the short cut is a para-aramid short cut. More preferably， the fibrid is a para-aramid fibrid， and the short cut is a para-aramid short cut. Compared to a system that satisfies the above requirements with a system containing only two of the above components， or less than 40 wt.% aramid fibrid， dielectric strength (expressed in kV/mm) and (Nm) It was found to show an increased value for the product of the tensile index (expressed as /g). The paper is relatively easy to manufacture and has good tear strength. The paper is particularly suitable for use in insulating conductors. The present invention pertains to an electrical insulating paper comprising 40-80 wt.% of aramid fibrid， 10-50 wt.% of aramid pulp， and 10-50 wt.% of aramid short-cut， the aramid pulp being para-aramid pulp with a length of 0.5-6 mm and a Schopper Riegler of 15-85. Preferably， the fibrid is para-aramid fibrid and/or the shortcut is para-aramid shortcut. More preferably， the fibrid is para-aramid fibrid， and the shortcut is para-aramid shortcut. It has been found that a paper meeting the above requirements shows an increased value for the product of the dielectric strength (expressed in k V/mm) and the tensile index (expressed in Nm/g)， as compared to systems comprising only two of the cited components， or less than 40 wt.% of aramid fibrid. The paper is relatively easy to manufacture， and has good tear strength. The paper is particularly suitable for use in insulated conductors. The present invention pertains to an electrical insulating paper comprising 40-80 wt.% of aramid fibrid， 10-50 wt.% of aramid pulp， and 10-50 wt.% of aramid short-cut， the aramid pulp being para-aramid pulp with a length of 0.5-6 mm and a Schopper Riegler of 15-85. Preferably， the fibrid is para-aramid fibrid and/or the shortcut is para-aramid shortcut. More preferably， the fibrid is para-aramid fibrid， and the shortcut is para-aramid shortcut. It has been found that a paper meeting the above requirements shows an increased value for the product of the dielectric strength (expressed in k V/mm) and the tensile index (expressed in Nm/g)， as compared to systems comprising only two of the cited components， or less than 40 wt.% of aramid fibrid. The paper is relatively easy to manufacture， and has good tear strength. The paper is particularly suitable for use in insulated conductors.