High molecular polymer powder material and preparation method thereof
The present invention provides a method for preparing a high molecular polymer powder material comprising the following steps: adding 20 parts of a high molecular powder material and 0.1 to 10 parts of carbon black into a mixing tank, and performing high-speed stirring for the first time to obtain a high molecular carbon black mixed powder material; adding the high molecular carbon black mixed powder material, 0.1 to 1 part of a flow aid, and 80 parts of a polymer powder material into the powder mixing tank; and performing high-speed stirring for a second time followed by sieving to obtain the high molecular polymer powder material.
1. A method of preparing a macromolecule polymer powder material, comprising:
adding 20 parts of macromolecule powder material and 0.1˜10 parts of carbon black into a stirring tank for a first high-speed stirring to obtain a macromolecule carbon black mixed powder material, wherein the macromolecule powder material is chosen from thermoplastic polyurethane powder material, ethylene-vinyl acetate copolymer powder material, polyethersulfone powder material, polyphenylene sulfide powder material, or polyether ether ketone powder material, and wherein the first high-speed stirring comprises:
a temperature of the stirring tank is maintained at 30˜40° C.;
a stirring rate of the stirring tank is 1500˜2000 r/min; and
a stirring time of the stirring tank is 0.5˜5 min; and
adding the macromolecule carbon black mixed powder material, 0.1˜1 part of flow aid, and 80 parts of the macromolecule powder material into a powder mixing tank for a second high-speed stirring, and then sieving, to obtain the macromolecule polymer powder material having an average particle size of 40˜75 μm, wherein the flow aid is chosen from fumed silica, fumed alumina, or nano titanium dioxide, wherein the second high-speed stirring comprises a first stage and a second stage, wherein the first stage comprises:
a temperature of the powder mixing tank is maintained at 70˜80° C.;
a stirring rate of the powder mixing tank is 1200˜1500 r/min; and
a stirring time of the powder mixing tank is 1˜20 min; and
wherein the second stage comprises:
the temperature of the powder mixing tank is maintained at 30˜40° C.;
the stirring rate of the powder mixing tank is 600˜800 r/min; and
the stirring time of the powder mixing tank is 3˜150 min.
2. The method of preparing the macromolecule polymer powder material according to claim 1 , wherein the carbon black has an average particle size of 60˜1000 nm.
3. The method of preparing the macromolecule polymer powder material according to claim 2 , wherein the carbon black has an average particle size of 60˜100 nm.
4. The method of preparing the macromolecule polymer powder material according to claim 2 , wherein a coverage rate of the carbon black on a surface of the macromolecule polymer powder material after sieving is 20%˜500%.