Preparation method of halogen-free low-smoke flame retardant crosslinked polyolefin insulation material for photovoltaic cable

Abstract

The invention discloses a preparation method of a halogen-free low-smoke flame retardant crosslinked polyolefin insulation material for a photovoltaic cable. The halogen-free low-smoke flame retardant crosslinked polyolefin insulation material for the photovoltaic cable is prepared by carrying out processes including pretreatment, internal mixing, twin-screw extrusion, single-screw extrusion pelleting, air cooling and packaging on resin, an inorganic flame retardant, a liquid flame retardant, a liquid crosslinking agent, nano-scale ceramics, white carbon black and a processing aid. According to the preparation method, the volume resistivity of a product is larger than that required in standard requirement by one order of magnitude; and the product has acid resistance and alkali resistance, and the performance of the product meets the performance of 125 DEG C halogen-free low-smoke flame retardant crosslinked polyolefin insulation material.

Description

technical field [0001] The invention belongs to the field of polymer material modification, and in particular relates to a method for preparing a halogen-free, low-smoke, flame-retardant cross-linked polyolefin insulating material for photovoltaic cables. Background technique [0002] The country vigorously promotes green energy, and green energy industries such as photovoltaic power generation have developed vigorously. However, due to long-term exposure to outdoors, photovoltaic cables will encounter various harsh natural environments during use, including large temperature differences between day and night, sunlight, Weathering, humidity, acid rain, freezing and sea water, etc. These natural environments will seriously affect the life and performance of the charging cable, and even reliability and safety, causing property damage and personal injury. Due to the flexible use of photovoltaic cables, it is inevitable that there will be artificial bending, twisting, dragging o...

AI Technical Summary

Problems solved by technology

[0002]The country vigorously promotes green energy, and green energy industries such as photovoltaic power generation have developed vigorously. However, due to long-term exposure of photovoltaic cables to the outdoors, various A harsh natural environment, including large temperature differences between day and night, sunlight, weathering, humidity, acid rain, freezing and sea water, etc., these natural environments will seriously affect the life and performance of the charging cable, and even reliability and safety, resulting in property damage and personal injury

Due to the flexible use of photovoltaic cables, it is inevitable that there will be artificial bending, twisting, dragging or even stretching, which will easily cause mechanical damage to the charging cable; properties of the material, causing damage to the cable