A high-efficiency flame-retardant and antibacterial functional masterbatch for direct injection molding of polypropylene and its preparation method

Abstract

The invention belongs to the technical field of plastic modification and processing, and in particular relates to a high-efficiency flame-retardant and antibacterial functional masterbatch which can be directly applied to injection molding processing of polypropylene products and a preparation method thereof; the functional masterbatch consists of two kinds of masterbatches A and B Combined, the mass percentage of A masterbatch is as follows: silver-loaded zinc inorganic antibacterial agent 6.0~10.0 wt.%, filler 50.0~70.0 wt.%, elastic ionomer 18.0~38.0wt.%, dispersant 0.5~ 1.0 wt.%, lubricant 0.5~0.1 wt.%; compared with the traditional plastic functional masterbatch, the functional masterbatch prepared by the present invention avoids the strong direct impact of the silver-loaded zinc inorganic antibacterial agent and the brominated flame retardant on the twin-screw. Under the action of shearing, the interaction between silver, zinc ions and bromide ions leads to mutual loss of modification performance, which significantly improves the modification performance of the two; the masterbatch is easy to disperse and process, and can be simply mixed with polypropylene resin according to the ratio After injection molding, and achieved excellent modification effect.

Description

technical field [0001] The invention belongs to the technical field of plastic modification and processing, and in particular relates to a high-efficiency flame-retardant and antibacterial functional masterbatch which can be directly applied to injection molding processing of polypropylene products and a preparation method thereof. Background technique [0002] Using twin-screw extruder to implement melt blending is a traditional method for plastic modification. Using the high-efficiency and excellent mixing performance of co-rotating twin-screw extruders, thermoplastics and various modified additives can be continuously melt-blended and extruded After granulation, the prepared modified special material will be used again for injection or extrusion processing to form various products. This technical route not only effectively improves the physical and mechanical properties of plastic products such as strength, toughness, stiffness, creep resistance, and flexure resistance, b...

AI Technical Summary

Problems solved by technology

However, in the processing process, the strong shearing effect of the twin-screw will lead to ion adsorption and even chemical reaction between the silver and zinc ions and the brominated flame retardant, which interferes with the modification effect of the two, resulting in its Mutual loss of antibacterial and flame retardant performance, or even complete failure

This typical phenomenon of mutual loss of additive modification performance seriously affects the modification effect of brominated flame retardants and silver-loaded zinc inorganic antibacterial agents.

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