Method for preparing high filling plastic masterbatch for polypropylene woven bag

Abstract

The invention relates to a method for preparing a high filling plastic masterbatch for a polypropylene woven bag. The method includes that inorganic powders with particle sizes of 1250 meshes, such as calcite powders, marble powders or talcum powders, are selected; an active auxiliary with the weight of 1-1.5% of the weight of the inorganic powders is added to the inorganic powders, and the mixture is heated and mixed in a high-speed mixer to coat the active auxiliary on the surface of the inorganic powders; a polypropylene resin with the weight of 5-10% of the weight of the inorganic powders and a polyethylene wax with the weight of 5-10% of the weight of the inorganic powders are added when the material temperature rises to 105-120 DEG C; mixing is continued, and the material temperature continues rising; the polyethylene wax gradually melts and mixed materials are stuck into granules the moment current of the high-speed mixer rises; rotation speeds of the high-speed mixer are adjusted into low speeds at the moment, a discharge valve is opened to discharge the materials, and the materials are cooled and crushed and then conveyed to a double-screw extruder for pelleting to obtain the high filling plastic masterbatch for the polypropylene woven bag. Under same strength of the woven bag, the high filling plastic masterbatch is large in filling amount, surfaces of weave wires are smooth, and production costs of the woven bag are effectively reduced.

Description

technical field [0001] The invention relates to a method for preparing high-filling plastic masterbatches for polypropylene woven bags, and belongs to the technical field of plastic filling modification. Background technique [0002] In the production process of woven bags, first of all, a certain amount of filled plastic masterbatch needs to be added to polypropylene and mixed, and then drawn into silk and woven into belts, which can not only improve the covering rate and coloring rate of silk, but also reduce the color of woven bags. the cost of. In the past, due to the defects of poor dispersion and coarse particle size of the filled plastic masterbatch, when the filled plastic masterbatch is added to polypropylene for mixing, the filling amount can generally only be added about 25%, and the filling amount is small. If the filling amount is increased, the strength of the yarn will be significantly reduced. At the same time, the ordinary plastic masterbatch is filled into...

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a method for preparing high-filling plastic masterbatches for polypropylene woven bags, mainly aiming at the poor dispersion of the existing filling plastic masterbatches in braiding and the low binding force between inorganic powder and polypropylene resin in the masterbatches To overcome the shortcomings of coarse powder particle size, less filling, rough surface of woven wire, expensive polypropylene woven bags, etc.