Preparation method of lubricating masterbatch

Abstract

A preparation method of a lubricating masterbatch comprises the following steps: 1) performing surface treatment of silica; 2) weighing 8%-15% by weight of treated silica, 1%-2% by weight of PE wax, 3%-5% by weight of oleic amide, 8%-10% by weight of POE elastomer and 68%-80% by weight of random polypropylene; 3) feeding all the weighed raw materials in a mixing device for mixing according to thecorresponding proportions for 15 minutes at a mixing speed of less than 100 rpm; 4) feeding the uniformly mixed raw materials into a twin-screw extruder for extrusion and granulation; and 5) cooling and granulating extruded plastic strips to form the lubricating masterbatch. Compared with the existing method of surface treatment by directly mixing inorganic lubricators such as coupling agent grafted silica, the surface treatment method of the preparation method has better effect and does not produce agglomeration.

Description

technical field [0001] The invention relates to a method for preparing an open-ended master batch, which belongs to the field of plastic master batch production. Background technique [0002] Plastic film is widely used in food packaging, medical packaging, stationery packaging and agricultural use. However, after the plastic is blown into a film, it is easy to form a vacuum-tight bond between the film layers, which is difficult to separate, which brings difficulties to packaging applications. [0003] There are three main aspects to the adhesion of plastic films: one is that after the film is closed, the film forms a vacuum tight state, which makes it difficult to separate; the other is that after the film is formed, the distance between the film layers is close, and there is van der Waals force between the molecules, which makes the film layers adsorb and adhere to each other: The third is that due to molecular thermal movement and migration, after the two films are close...

AI Technical Summary

Problems solved by technology

[0010] The present invention overcomes the shortcomings in the prior art, provides a method for preparing open-ended master batches, prevents the agglomeration of inorganic anti-opening agents, and effectively solves the agglomeration phenomenon of inorganic powders in the process of processing and adding, ensuring that the inorganic Uniform dispersion of powder in the film without affecting the film production process