Method and equipment for improving metallocene catalyzed polythene working property

Abstract

The present invention relates to a method for improving workability of metallocene catalyst polyethylene and its equipment. It is characterized by that the metallocene catalytic polyethylene materialis processed and extruded out by means of ultrasonic extruding equipment, said material is heated, plasticized and molten, heat temp. is 120-220 deg.c, after the molten material is irradiated by ultrasonic wave, it is flowed out from mouth die capillary of machine head, its ultrasonic frequency is 10-30 KHz, irradiation power is 5-110 w / g. Said invention effectively improves the workability of the metallocene catalytic polyethylene so as to greatly raise its application property.

Description

1. Technical field [0001] The invention relates to the field of polymer processing, in particular to the technical field of metallocene catalyzed polyethylene processing. 2. Technical background [0002] Polyethylene is the most important general-purpose plastic in the world, accounting for about 30% of plastic production. Metallocene catalyzed Polyethylene (mPE) is a new generation of polyethylene catalyzed and polymerized by metallocene catalysts. Its excellent performance has attracted widespread attention from the world plastics industry. developed greatly. Metallocene catalysts are different from traditional Zeigler-Natta catalysts. They can strictly control the molecular structure of polymers, so that mPE has more excellent properties than other PEs, such as: high purity, high transparency, high strength, high toughness, High heat seal strength and the ability to "customize" the properties of the resin as required. However, the disadvantage of mPE is that it has poo...

AI Technical Summary

Problems solved by technology

However, the above-mentioned chemical methods and physical and mechanical means are used to modify mPE, while improving its processing performance, it often causes major changes in the molecular structure of mPE, thereby affecting its performance; and the use of improved processing equipment to improve mPE The effect of processing performance is good, but there are problems that cannot be ignored, such as high cost and single use of processing equipment.

Images