The current electrostatic electret methods mainly include electrostatic spinning method, corona discharge method, triboelectric method, thermal polarization method, low energy electron beam bombardment method, etc., among which corona discharge method is currently the best electrostatic electret method.
In the corona discharge method, the melt-blown fiber web is charged with one or more sets of corona discharge through the electrostatic generator needle electrode (voltage is generally 5-10KV) before winding, and the needle tip is charged when a high voltage is applied The air below generates corona ionization and local breakdown discharge. Carriers are deposited on the surface of the meltblown cloth by the electric field. Part of the carriers will penetrate into the surface layer and be trapped by the trap of the electret masterbatch. Become an electret filter material.
Increasing the charge on the surface of the melt-blown cloth can be obtained by the electret treatment process of the corona discharge method, but to make this electrostatic storage not decay, then the composition and structure of the material of the melt-blown electret material is needed to help charge retention. The way to improve the charge storage capacity of electret materials can be to induce charge traps by introducing additives with charge storage properties.
Therefore, Spunbond nonwoven Suppliers with ordinary melt-blown production lines, the production of melt-blown production lines for air filtration materials requires the addition of high-voltage electrostatic discharge devices in the production lines, and the addition of electret masterbatch, such as tourmaline, to the production raw material polypropylene (PP) particle.
In the corona discharge method, the melt-blown fiber web is charged with one or more sets of corona discharge through the electrostatic generator needle electrode (voltage is generally 5-10KV) before winding, and the needle tip is charged when a high voltage is applied The air below generates corona ionization and local breakdown discharge. Carriers are deposited on the surface of the meltblown cloth by the electric field. Part of the carriers will penetrate into the surface layer and be trapped by the trap of the electret masterbatch. Become an electret filter material.
Increasing the charge on the surface of the melt-blown cloth can be obtained by the electret treatment process of the corona discharge method, but to make this electrostatic storage not decay, then the composition and structure of the material of the melt-blown electret material is needed to help charge retention. The way to improve the charge storage capacity of electret materials can be to induce charge traps by introducing additives with charge storage properties.
Therefore, Spunbond nonwoven Suppliers with ordinary melt-blown production lines, the production of melt-blown production lines for air filtration materials requires the addition of high-voltage electrostatic discharge devices in the production lines, and the addition of electret masterbatch, such as tourmaline, to the production raw material polypropylene (PP) particle.
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