A kind of PE melt index adjustment masterbatch and preparation method thereof

Abstract

The invention discloses a PE melt index regulating masterbatch and a preparation method thereof. The masterbatch comprises: 8-12 parts of EVA resin, 1,4-bis-tert-butylperoxycumene 45 parts by weight ~55 parts, 10~15 parts of polyethylene grafted maleic anhydride, 20~25 parts of inorganic dispersant, 4~6 parts of Fischer-Tropsch wax, 0.1~0.2 part of surfactant; the preparation method includes the improvement of inorganic dispersant properties, high-speed mixing and granulation steps of the various material components. The PE melt index regulating masterbatch and its preparation method provided by the present invention, said PE melt index regulating masterbatch has an excellent melt index regulating function, can effectively reduce the melt index of PE material, avoid the phenomenon of extrusion stacking and large diameter Due to the high melt index of the PE pipe, the phenomenon of upper thickness and lower thickness caused by self-flowing sag occurs, and the phenomenon of transitional crosslinking does not occur, so that the product can maintain thermoplasticity, has good applicability, and has a wide range of applications; the preparation method The process is simple, does not require heating, and is 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