High-efficiency composite PBT heat conduction and dispersion material, and preparation method and applications thereof
A technology of heat dissipation material and preheating temperature, which is applied in the field of high-efficiency composite PBT heat conduction and heat dissipation materials and its preparation, can solve the problems of failing to pass the UL94V0 thin-wall test standard and low flame retardant level, and achieve good mechanical properties, high insulation, and easy The effect of processing
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[0036] Example 1
[0037] In this embodiment, the PBT heat conductive material is prepared from PBT with a mass ratio of 8:2 and heat conductive masterbatch, wherein the heat conductive masterbatch is prepared from the following raw materials:
[0038] 70% polyester
[0039] Metal oxide 20%
[0040] Nitride 10%
[0041] The preparation method is as follows:
[0042] (1) The metal oxide, nitride and polyester fiber are blended and doped at a stirring rate of 80r / min, and extruded using a twin-screw extruder. The preheating temperature of the screw area of the twin-screw extruder is 200℃, the screw speed is 200r / min, and the heat-conducting masterbatch is obtained;
[0043] (2) Blend PBT and heat-conducting masterbatch at a stirring rate of 100r / min, and extrude using a twin-screw extruder. The preheating temperature of the screw area of the twin-screw extruder is 300°C, so The screw speed of the twin-screw extruder is 300 r / min to obtain the PBT heat conducting and heat dissipation m...
Example Embodiment
[0044] Example 2
[0045] In this embodiment, the PBT heat-conducting and heat-dissipating material is prepared from PBT with a mass ratio of 7.5:2.5 and heat-conducting masterbatch, wherein the heat-conducting masterbatch is prepared from the following raw materials:
[0046] Polyester fiber 65%
[0047] Metal oxide 15%
[0048] Nitride 20%
[0049] The preparation method is as follows:
[0050] (1) The metal oxide, nitride and polyester fiber are blended and doped at a stirring rate of 80r / min, and extruded by a twin-screw extruder. The preheating temperature of the screw area of the twin-screw extruder is 300℃, the screw speed is 150r / min, the heat dissipation masterbatch is obtained;
[0051] (2) Blend PBT and heat-conducting masterbatch at a stirring rate of 150r / min, and extrude using a twin-screw extruder. The preheating temperature of the screw area of the twin-screw extruder is 260°C, so The screw speed of the twin-screw extruder is 250 r / min to obtain the PBT heat conducti...
Example Embodiment
[0052] Example 3
[0053] In this embodiment, the PBT heat-conducting and heat-dissipating material is prepared from PBT with a mass ratio of 8.5:1.5 and heat-conducting masterbatch, wherein the heat-conducting masterbatch is prepared from the following raw materials:
[0054] 75% polyester
[0055] Metal oxide 15%
[0056] Nitride 10%
[0057] The preparation method is as follows:
[0058] (1) The metal oxide, nitride and polyester fiber are blended and doped at a stirring rate of 70r / min, and extruded by a twin-screw extruder. The preheating temperature of the screw area of the twin-screw extruder is 250℃, the screw speed is 180r / min, and the heat dissipation masterbatch is obtained;
[0059] (2) Blend PBT and heat-conducting masterbatch at a stirring rate of 150r / min, and extrude using a twin-screw extruder. The preheating temperature of the screw area of the twin-screw extruder is 380°C. The screw speed of the twin-screw extruder is 250 r / min to obtain the PBT heat conducting ma...
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