Special master batch for hot press molding transparent polypropylene as well as preparation method and application of master batch

Abstract

The invention provides a master batch special for hot press molding transparent polypropylene as well as a preparation method and application of the master batch. The master batch special for the hot press molding transparent polypropylene comprises the following components in percentage by weight: 76.5-94.7% of polypropylene resin; 5-20% of a composite transparent nucleating agent (comprising four composite transparent nucleating agents of sorbitol, phosphate, rosin and carboxylate, which are compounded according to the weight percentage of 55-85: 5-15: 5-15: 5-15)); 0.1-5% of a compatibilizer; 0.1-5% of a lubricant; 0.1-3% of an antioxidant master batch; wherein the compatibilizer is a compatilizer, a coupling agent or a dispersing agent. The master batch special for hot-press molding transparent polypropylene is uniformly mixed with polypropylene matrix resin in the production of hot-press molding polypropylene products such as disposable cola cups, can effectively and directly reduce the agglomeration phenomenon generated by a nucleating agent, can be secondarily crystallized and dispersed in the hot-press molding process, and effectively improves the transparency and mechanical properties of polypropylene; and the preparation method has the advantages of low cost and easiness in processing.

Description

technical field [0001] The invention relates to a special masterbatch for polypropylene, in particular to a special masterbatch for hot-pressing transparent polypropylene and a preparation method and application thereof. Background technique [0002] With the rapid development of the national economy, the amount of thin-walled transparent containers such as disposable cola cups, milk cups and ice cream cups has increased year by year. Because polypropylene has the characteristics of high heat resistance and good hygiene, it is widely used in the production of this field. [0003] At present, most of the transparent disposable water cup manufacturers use hot pressing technology to produce this product, that is, firstly, the polypropylene base resin is extruded into a sheet of a certain thickness, and then a cup of a certain volume is prepared by hot pressing with an automatic hydraulic cup making machine. Hot press molding is a simple and common processing method in the plas...

AI Technical Summary

Problems solved by technology

Since the transparent nucleating agent is relatively difficult to disperse, it is easy to reunite locally, which will cause large fluctuations in the transparency of the disposable water cup and unstable quality; in order to ensure the transparency of the disposable water cup, the manufacturer will further increase the addition of the nucleating agent volume, which will lead to an increase in production costs

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