Diesel and kerosene resistant high-shrinkage heat-shrinkable tube for optical fiber splicing and sealing and preparation method thereof

The invention provides a diesel and kerosene resistant high-shrinkage heat-shrinkable tube for optical fiber splicing and sealing and a preparation method thereof. Firstly a formula of a radiation crosslinking polyolefin base material is broken through, high density polyethylene with high mechanical strength and high crystallization property is selected as a main ingredient, a small amount of flexible medium density polyethylene with excellent low temperature performance and linear low density polyethylene with good processability are taken as auxiliary materials, and working procedures such as preparing, mixing, pelletizing by extrusion, sheet extruding and irradiating are carried out, so that the heat-shrinkable tube is obtained. The heat-shrinkable tube can realize the shrinkage requirement reaching 6 times according to deviation between an optical fiber splice closure and the diameter of an optical fiber and can be used normally after being soaked by diesel and kerosene for a long time ...