Efficient enhanced type halogen-free flame-retardant functional master batch for direct injection molding of nylon 6 and preparation method of efficient enhanced type halogen-free flame-retardant master batch

Abstract

The invention belongs to the technical field of plastic modification and processing, and particularly relates to an efficient enhanced type halogen-free flame-retardant functional master batch for direct injection molding of nylon 6 products and a preparation method of the efficient enhanced type halogen-free flame-retardant functional master batch. The functional master batch is formed by combining a mater batch A and a master batch B, the master batch A is prepared from the following materialss in percentage by weight: 50.0-70.0% of glass fibers, 20.0-35.0% of high-flow nylon 6 resin, 3.0-10.0% of maleic anhydride grafted elastic ionomer, 3.0-6.0% of star-shaped nylon 6 resin, and 0.1-0.3% of an antioxidant. Compared with traditional plastic functional master batches, the functional master batch prepared through the method avoids mutual modification efficiency loss caused by mutual shear abrasion of glass fibers and a flame retardant in the processing course of enhanced type halogen-free flame retardant nylon 6 modification systems, and meanwhile solves the problem of mismatched processing temperatures of the two modification systems is solved and remarkably enhances the modification efficiency of the two modification systems is remarkably enhanced; the mater batch has a feature of easy dispersion processing and can be directly and simply mixed with nylon 6 resin according tothe proportion and then subjected to injection molding, and an excellent modification effect can be achieved.

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 nylon 6 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, but...

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Problems solved by technology

The following technical advantages can be obtained by using the method of processing the two masterbatches separately: ① avoiding the direct blending of glass fiber and phosphorus / nitrogen flame retardants to generate internal friction and heat generation, resulting in the decomposition of phosphorus / nitrogen flame retardants; ② Solved the problem of mismatching processing temperature of glass fiber-reinforced nylon 6 and phosphorus-nitrogen compound flame-retardant nylon 6 two modified systems for melt blending; ③Using melt pultrusion technology to prepare a masterbatch that is stronger than traditional chopped glass fiber Reinforced masterbatch with larger fiber aspect ratio

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