High-efficiency enhanced halogen-free flame-retardant functional master batch for polypropylene direct injection molding and preparation method of functional master batch

Abstract

The invention belongs to the technical field of plastic modification and processing and in particular relates to a high-efficiency enhanced halogen-free flame-retardant functional master batch capableof being directly applied to injection molding of polypropylene products and a preparation method of the functional master batch. The functional master batch is prepared by combining a master batch Aand a master batch B, wherein the master batch A comprises the following components in percentage by mass: 50.0-70.0% of glass fibers, 15.0-35.0% of high-fluidity polypropylene, 5.0-10.0% of an elastic ionomer, 3.0-6.0% of atactic polypropylene, 1.0-3.0% of maleic anhydride grafted polypropylene, 1.0-3.0% of polytetrafluoroethylene powder and 0.1-0.3% of an antioxidant. Compared with the traditional plastic functional master batch, the functional master batch prepared by the invention has the advantages that the condition that the modification effectiveness is low because the glass fibers andthe flame retardant perform mutual shearing friction to produce heat in the processing procedures of an enhanced halogen-free flame-retardant polypropylene modified system is avoided, the problem that mutual modification effectiveness damage is caused by mismatching of processing temperatures of the two modified systems is solved, and the modification effectiveness of the two is obviously enhanced.

Description

technical field

[0001] The invention belongs to the technical field of plastic modification and processing, and in particular relates to a high-efficiency enhanced halogen-free flame-retardant 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 resistanc...

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