Inflaming retarding aerosis polyamide arc extinguishing composite material
A composite material and polyamide technology are used in the preparation of miniature circuit breakers, flame-retardant gas-generating polyamide arc-extinguishing composite materials and their preparation fields, which can solve the problems of less arc-extinguishing materials and achieve excellent mechanical properties and thermal decomposition temperature. The effect of reduced, high arc extinguishing performance
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Embodiment 1
[0034] Use the following weights of ingredients:
[0035]
[0036] Stir and mix polyamide 66, polyamide 6 and heat stabilizer (1098, 168) evenly, and then feed them into the twin-screw extruder from a feeder with precision metering; Water-absorbing compound (sodium polyacrylate), arc-extinguishing gas-generating flame-retardant compound (melamine cyanurate) and gas-generating accelerator (potassium nitrate) are stirred evenly at high speed, and added from the precision metering feeder through the fourth section of the side feeding port Twin-screw extruder; the polyamide prepolymer is fed from the sixth section of the barrel by a liquid metering feeder, fully plasticized, melted, compounded, extruded, drawn, water cooled, pelletized and dried to obtain Polyamide composite materials; among them, the aspect ratio of the twin-screw extruder is 36:1, and the temperature of each section of the screw is: the temperature of each working section from the first barrel to the eighth b...
Embodiment 2
[0038] Use the following weights of ingredients:
[0039]
[0040] The preparation method of the polyamide composite material is the same as in Example 1, and the polyamide composite material is obtained. The temperature of each section of the screw is: the temperature of each working section from the first barrel to the eighth barrel is 240±5, 240±5, 240±5, 240±5, 230±5, 230±5, 230±5 , 230±5, the temperature of the head is 230±5℃.
Embodiment 3
[0042] Use the following weights of ingredients:
[0043]
[0044]
[0045] The preparation method of the polyamide composite material is the same as in Example 1, and the polyamide composite material is obtained. The temperature of each section of the screw is: the temperature of each working section from the first section of the machine barrel to the eighth section of the machine barrel is 230 ± 5, 230 ± 5, 230±5, 230±5, 220±5, 220±5, 220±5, 220±5, the temperature of the machine head is 220±5℃.
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