Production method and production device for resin powder or inorganic powder
The present invention provides a method and an apparatus for producing a resin powder or an inorganic powder and capable of easily removing the metal component generated from the sieving wire mesh itself in addition to space saving and a high processing speed in the sieving step while maintaining the classification capacity of the sieving wire mesh. The method including: a sieving step of sieving a resin powder to be processed or an inorganic powder to be processed using a sieving wire mesh having a Vickers hardness of 220 HV or more; and a magnetic separation step of removing, from a resin powder or an inorganic powder containing a metal component after the sieving step, the metal component using a magnetic separator. The apparatus including: a sieving wire mesh having a Vickers hardness of 220 HV or more; and a magnetic separator.
1. A method for producing a resin powder or an inorganic powder, the method comprising:
a sieving step of sieving a resin powder to be processed or an inorganic powder to be processed using a sieving wire mesh having a Vickers hardness of 220 HV to 320 HV; and
a magnetic separation step of removing, from a resin powder or an inorganic powder containing a metal component after the sieving step, the metal component using a magnetic separator, wherein
the resin powder contains a crosslinked polymer, and
the inorganic powder contains an inorganic ion exchanger.
2. The production method according to claim 1 , wherein a tensile strength of a material constituting the sieving wire mesh is 500 N/mm 2 or more.
3. The production method according to claim 1 , wherein the crosslinked polymer is a water-absorbing resin.
4. An apparatus for producing a resin powder or an inorganic powder, the apparatus comprising: a sieving wire mesh having a Vickers hardness of 220 HV to 320 HV; and a magnetic separator, wherein
the resin powder contains a crosslinked polymer, and
the inorganic powder contains an inorganic ion exchanger.
5. The apparatus for producing the resin powder or the inorganic powder according to claim 4 , wherein a tensile strength of a material constituting the sieving wire mesh is 500 N/mm 2 or more.