Method for preparing flame-retardance-modified-by-red-phosphorus plastic raw material

Abstract

The invention discloses a method for preparing a flame-retardance-modified-by-red-phosphorus plastic raw material. The method comprises the following steps: (A) cleaning wastes: putting plastic wastes and a mixture, which is prepared from nylon 6 and nylon 66 through mixing according to the mass ratio of 3: 1, into a pickling tank, soaking for 2 days, then, fishing out and air-drying; (B) crushing the air-dried wastes, heating to melt the wastes, adding a flame-retardant masterbatch-1330 material, PMMA resin, a flame-retardant masterbatch, tetrafluoroethylene, paraffin, polyphenylene sulfide and red phosphorus, and enabling the raw material to be viscous; (C) carrying out double-roller smelting at the temperature of 178+ / -2 DEG C, carrying out plastication for 3 minutes, carrying out mulling for 5-7 minutes, extruding the viscous raw material obtained in the step (B), so as to form strips, arranging a cutter in front of the extruder, cutting the strips once every 1mm, so as to form small strips, and enabling the cut small strips to fall onto a water-cooled conveying belt, wherein the temperature of a single-screw extruder is 180 DEG C, 190 DEG C or 205 DEG C; (D) cooling the small strips by the water-cooled conveying belt during conveying, and bagging until the small strips are conveyed to the tail end, thereby obtaining flame-retardance-modified-by-red-phosphorus plastic raw material granules. The method is simple in preparation, convenient in use and high in waste utilization ratio.

Description

[0001] technical field [0002] The invention relates to the technical field of plastic raw materials. In particular, it relates to a method for manufacturing red phosphorus modified flame-retardant plastic raw materials. [0003] Background technique [0004] In people's daily life, various plastic products are used. These plastic products are not easy to degrade after being discarded, and random discarding will cause pollution problems. Therefore, the recycling of these discarded plastic products is a technical problem that needs to be solved. At present, the application of a series of plastics including polyethylene, polypropylene, polyvinyl chloride, polystyrene and polyester covers all aspects of industrial and agricultural production and people's daily life. However, with the wide and large application of plastic boxes and plastic products, various waste plastics and waste plastic products are also produced in large quantities. These waste plastics are difficult to d...

AI Technical Summary

Problems solved by technology

However, with the wide and large application of plastic boxes and plastic products, various waste plastics and waste plastic products are also produced in large quantities. These waste plastics are difficult to degrade in the natural environment and can only be disposed of by incineration or landfill.

However, when incinerated, many harmful gases such as hydrogen chloride will be produced due to high-temperature combustion, which will cause great harm to the environment.

In the landfill process, the toxic substances in the plastic will seep out, causing secondary pollution and affecting the use value of the land.