Master batch capable of adjusting melt index of PE and preparation method thereof

Abstract

The invention discloses a master batch capable of adjusting the melt index of PE and a preparation method thereof. The master batch comprises the following components in parts by weight: 8 to 12 partsof EVA resin, 45 to 55 parts of 1,4-bis (tert-butylperoxy)isopropyl benzene, 10 to 15 parts of polyethylene grafted maleic anhydride, 20 to 25 parts of an inorganic dispersing agent, 4 to 6 parts ofFischer-Tropsch wax and 0.1 to 0.2 part of a surfactant. The preparation method comprises the following steps: modification of the inorganic dispersing agent; mixing of all the material components ata high speed; and granulating. According to the invention, the master batch has an excellent melt index adjusting function, can effectively reduce the melt index of a PE material, avoids the phenomenaof extrusion stacking and formation of a large-caliber PE pipe with a thick upper part and a thin lower part caused by self-flowing drooping due to a too high melt index, is free of the phenomenon ofexcessive crosslinking, allows a product to maintain thermoplasticity, and has good applicability and a wide application range; and the preparation method is simple in process, free of heating and easy to implement.

Description

technical field [0001] The invention relates to the technical field of plastic processing and modification, in particular to a masterbatch for adjusting PE melt index and a preparation method thereof. Background technique [0002] The melt index of PE material is a value that reflects its processing fluidity. The higher the melt index, the better its processing fluidity, and vice versa. Usually, in PE pipe extrusion process, PE industrial blue and white barrel production process, HDPE hollow type blow molding, HDPE film, HDPE wire drawing process, the melt index is required to be controlled in a suitable range, such as PE solid wall pipe (water supply pipe ), the melt index is required to be between 0.2-0.25g / 10min (190°C, 5kg), while the bellows is required to be controlled at 0.8-1.0±0.1g / 10min (190°C, 5kg). When the melt index is too low, then Difficult to process, but the melt index is too high, prone to stacking, resulting in increased weight and cost, especially for l...

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a PE melt index adjusting masterbatch and its preparation method, aiming at solving the problem that existing melt index adjusters cannot effectively adjust the melt index of PE material, so that in In the production process, it is easy to cause stacking and self-flowing phenomenon, which increases the cost of the product, and the problem of poor adaptability of the existing melt index regulator