Low-density flame-retardant polypropylene foam material and preparation method thereof
A technology of flame-retardant polypropylene and foaming materials, applied in the field of low-density flame-retardant polypropylene foaming materials and their preparation, can solve the problems of unbalanced foaming effect and flame-retardant performance, and achieve environmental protection and pollution-free foaming costs. , low VOC content, uniform apparent quality effect
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[0043] Example 1
[0044] Method for preparing low-density flame retardant polypropylene foamed materials, including the following steps:
[0045] (1) Weigh 73 parts by weight, 73 parts of polypropylene, 20 flame retardants, 3 copies of iron oxide, 3 servants, 0.3 parts of polyethylene wax, 0.3 stearate, tougain 6 parts of the agent, the antioxidant 1010 and the antioxidant 168 were 0.2 parts, and the above components were mixed in a low speed mixer for 20 minutes, and in the twin screw extruder, the extruder 1 to the 12-region temperature is set to 150 ° C, 180 ° C, 200 ° C, 200 ° C, 200 ° C, 200 ° C, 205 ° C, 205 ° C, 205 ° C, 205 ° C, 210 ° C, 210 ° C, the head is 200 ° C, the mixture is melted, kneaded Flame-retardant polypropylene material is obtained by mixing, extrusion, cooling, granulation, drying.
[0046] (2) Put the flame retardant polypropylene material into the autoclave, using supercritical fluid techniques for foaming, the specific process parameters are: control t...
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[0047] Example 2 and Example 3 show that the product formulation for preparing the flame-retardant polypropylene material is adjusted to prepare a low density flame retardant polypropylene foam material in the premise of the foaming process parameter.
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