A high thermal conductivity thermoplastic powder coating with uniform particle size distribution and preparation method thereof
A particle size distribution and powder coating technology, applied in powder coatings, polyamide coatings, coatings, etc., can solve problems such as restricting the development of powder coatings, uneven heat transfer and melting, and affecting coating quality, and achieve particle size distribution Good uniformity, fine particle size, and excellent thermal conductivity
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Embodiment 1
[0033] (1) Grind the soluble salt first, then add it to a high-speed mixer with thermoplastic polymers and graphene microchips to disperse evenly, and then extrude and granulate through a screw extruder to obtain a composite thermoplastic polymer; the soluble salt is chlorine Sodium chloride; the thermoplastic polymer is polyethylene; the speed of dispersion in the high-speed mixer is 520r / min, and the time is 10min; the temperature of screw extrusion is 165°C;
[0034] The ratio of each raw material is, by weight, 52 parts of soluble salt, 58 parts of thermoplastic polymer, and 1.2 parts of graphene microflakes;
[0035](2) The composite thermoplastic polymer prepared in step (1) is first pulverized by a jet mill, and then classified and sieved by a sieve to obtain a fine polymer; the jet mill is a vortex jet mill, and the pulverization It is carried out under liquid nitrogen freezing conditions using high-speed airflow, the speed of high-speed airflow is 420m / s; the classifi...
Embodiment 2
[0038] (1) Grind the soluble salt first, then add it to a high-speed mixer with thermoplastic polymers and graphene microchips to disperse evenly, and then extrude and granulate through a screw extruder to obtain a composite thermoplastic polymer; the soluble salt is chlorine Sodium chloride; the thermoplastic polymer is polypropylene; the speed of dispersion in the high-speed mixer is 580r / min, and the time is 8min; the temperature of screw extrusion is 175°C;
[0039] The ratio of each raw material is, in parts by weight, 58 parts of soluble salt, 52 parts of thermoplastic polymer, and 1.4 parts of graphene microflakes;
[0040] (2) The composite thermoplastic polymer prepared in step (1) is first pulverized by a jet mill, and then classified and sieved by a sieve to obtain a fine polymer; the jet mill is a vortex jet mill, and the pulverization It is carried out under liquid nitrogen freezing conditions using high-speed airflow, the speed of high-speed airflow is 480m / s; th...
Embodiment 3
[0043] (1) Grind the soluble salt first, then add it to a high-speed mixer with thermoplastic polymers and graphene microchips to disperse evenly, and then extrude and granulate through a screw extruder to obtain a composite thermoplastic polymer; the soluble salt is chlorine Sodium chloride; the thermoplastic polymer is polyamide; the speed of dispersion in the high-speed mixer is 560r / min, and the time is 9min; the temperature of screw extrusion is 170°C;
[0044] The ratio of each raw material is, by weight, 56 parts of soluble salt, 54 parts of thermoplastic polymer, and 1.3 parts of graphene microflakes;
[0045] (2) The composite thermoplastic polymer prepared in step (1) is first pulverized by a jet mill, and then classified and sieved by a sieve to obtain a fine polymer; the jet mill is a vortex jet mill, and the pulverization It is carried out under liquid nitrogen freezing conditions using high-speed airflow, the speed of high-speed airflow is 460m / s; the classificat...
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