High-efficiency reinforced halogen-free flame retardant functional masterbatch for polyoxymethylene direct injection molding and preparation method thereof

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 masterbatch and a preparation method thereof which can be directly applied to injection molding of polyoxymethylene products; the functional masterbatch is composed of A and B two It is composed of two kinds of masterbatches. The mass percentage of A masterbatch is as follows: glass fiber 50.0~70.0 wt.%, high flow polyoxymethylene 22.0~40.0 wt.%, polyoxyethylene 5.0~7.0 wt.%, polytetrafluoroethylene Powder 1.0~3.0 wt.%, Antioxidant 0.1~0.3 wt.%. Compared with the traditional plastic functional masterbatch, the functional masterbatch prepared by the present invention avoids the processing of polyoxymethylene in the enhanced halogen-free flame retardant modification system. During the process, the decomposition of the flame retardant and the matrix resin is caused by the mutual shear friction and heat generation between the glass fiber and the flame retardant, and at the same time solves the problem of mutual loss of modification performance caused by the mismatch of the processing temperature of the above two modification systems. Significantly enhanced the modification efficiency of both.

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 the injection molding processing of polyoxymethylene 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 re...

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