Low-dielectric-constant insulating paper and preparation method thereof
A low dielectric constant, insulating paper technology, applied in insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of reducing the dielectric constant of insulating paper and increasing the cost of synthetic fibers, achieving low cost and improving insulation. performance, the effect of prolonging the safety life
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[0014] Example 1
[0015] In this example, the required test materials are: cardboard (component A), and silica hollow microsphere particles with an average diameter of 500 nm (component B). After beating the cardboard according to the general insulating paper making procedure, dilute it to 0.4wt.%, dissolve it in a fiber dissociator for 3 minutes, and remove the vibrated SiO 2 Pour the hollow microsphere suspension into the fiber dissociator and continue stirring for 10 minutes to make it evenly mixed. The stirring temperature is normal temperature, the stirring time is 1-20min, and the stirring rate is 3000r·min. -1 , SiO 2 The amount of hollow microsphere suspension is 5wt.%, and finally, it is copied on a paper former to make a basis weight of 120g / m 2 After being compacted, the preparation is completed by drying at 105 degrees Celsius for 5 minutes. The prepared insulating paper contains SiO 2 The mass percentage of hollow microspheres is 5%. SiO 2 Preparation method of hollo...
Example Embodiment
[0017] Example 2
[0018] In this embodiment, the required test materials are: cardboard (component A), and silica hollow microsphere particles with a diameter of 500 nm (component B). After beating the cardboard according to the general insulating paper making procedure, dilute it to 0.4wt.%, dissolve it in a fiber dissociator for 3 minutes, pour the vibrated SiO2 hollow microsphere suspension into the fiber dissociator and continue stirring Let it mix evenly in 10 minutes, the stirring temperature is normal temperature, the stirring time is 1-20min, and the stirring rate is 3000r·min -1 . Finally, the insulating paper with a basis weight of 120g / m2 is made on the paper former. After compaction, the preparation is completed by drying at 105 degrees Celsius for 5 minutes. The mass percentage of SiO2 hollow microspheres in the prepared insulating paper is 3%.
[0019] The dielectric constant of the modified insulating paper after immersion in oil was measured. The dielectric cons...
Example Embodiment
[0020] Example 3
[0021] In this embodiment, the required test materials are: cardboard (component A), and silica hollow microsphere particles with a diameter of 500 nm (component B). After beating the cardboard according to the general insulating paper making procedure, dilute it to 0.4wt.%, dissolve it in a fiber dissociator for 3 minutes, pour the vibrated SiO2 hollow microsphere suspension into the fiber dissociator and continue stirring Let it mix evenly in 10 minutes, the stirring temperature is normal temperature, the stirring time is 1-20min, and the stirring rate is 3000r·min -1 . Finally, the insulating paper with a basis weight of 120g / m2 is made on the paper former. After compaction, the preparation is completed by drying at 105 degrees Celsius for 5 minutes. The mass percentage of SiO2 hollow microspheres in the prepared insulating paper is 7%.
[0022] The dielectric constant of the modified insulating paper after immersion in oil was measured. The dielectric cons...
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