PROCESS FOR HIGHLY REMANENT FIBROUS COMPOSITE PRODUCTION Russian patent published in 2008 - IPC B01D39/16 

FIELD: physics.

SUBSTANCE: process for highly remanent fibrous composite production includes extrusion forming and subsequent pneumatic extrusion processing of granulated polyethylene filled with powdered strontium ferrite with mass concentration up to 30 %; before extrusion forming the filling material is during 10 minutes mixed with dioctylphtalate (polyethylene plasticizer) under ultrasonic radiation at 100 kHz; during subsequent pneumatic extrusion processing of granulated composition, pneumo-dispersive viscous-flow fibers container herein are additionally exposed to ultrasonic irradiation at 250 kHz at a distance 5-10 cm from spinneret and to magnetic field (1400 kA/m) at 10-20 cm from spinneret. The method ensures fine dispersion of ferrite particles in polyethylene-compatible low-viscous medium, facilitates homogeneous distribution of filling material in granules during extrusion beading and further pneumatic extrusion forming of fibrous material, improves deaggregation of ferrite particles, and provides ordered distribution of small particles within fibers.

EFFECT: increased remanence of fibrous composite.

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