Preparation method for polymer composite particle material, and three-dimensional printing method by using polymer composite particle material

A preparation method for a polymer composite particle material, wherein the polymer composite particle material can be used as a material in three-dimensional printing for improving mechanical property of a three-dimensional printed finished product;

• the preparation method comprises the following steps:
• a first heating step:
• putting a polymer powder and a carbon powder into a mixing mill, and performing mixing for a first time under a condition that a cavity temperature of the mixing mill is a first temperature;
• a second heating step:
• raising the cavity temperature of the mixing mill from the first temperature to a second temperature at a speed of 1-10° C./min, and maintaining the second temperature for a second time;
• and
• a third heating step:
• raising the cavity temperature of the mixing mill from the second temperature to a third temperature at a speed of 0.1-5° C./min, and maintaining the third temperature for a third time to obtain the polymer composite particle material for three-dimensional printing, wherein
• when the first temperature, the second temperature, and the third temperature are set to be T1, T2, and Ta3 respectively, and a melting point of the polymer powder is set to be Tm, T1, T2, T3, and Tm satisfy the following relational expressions:
• 1
• /
• 4
• ⁢
• T
• ⁢
• 1
• ≤
• T
• ⁢
• 1
• ≤
• 3
• /
• 4
• ⁢
• T
• ⁢
• 1
• ;
• 0
• ≤
• Tm
• -
• T
• ⁢
• 2
• ≤
• 20
• ;
• and
• 5
• ≤
• T
• ⁢
• 3
• -
• T
• ⁢
• 2
• ≤
• 30
• ;
• when the first time, the second time, and the third time are set to be X1, X2, and X3 respectively, X1, X2, and X3 satisfy the following relational expressions:
• 30
• ⁢
• min
• ≤
• X
• ⁢
• 1
• +
• X
• ⁢
• 2
• +
• X
• ⁢
• 3
• ≤
• 200
• ⁢
• min
• ,
• and
• X
• ⁢
• 1
• ,
• X
• ⁢
• 2
• ,
• and
• ⁢
• X
• ⁢
• 3
• ⁢
• are
• ⁢
• all
• ⁢
• not
• ⁢
• zero
• .