The invention relates to a plastic hose for a mine and a preparation method. The plastic hose comprises 90-110 parts of
polyvinyl chloride, 28-34 parts of
dibutyl phthalate, 36-44 parts of chlorinated paraffin-52, 3-5 parts of stabilizing agent, 1 part of
stearic acid, 7-9 parts of
flame retardant and 14-16 parts of
carbon black. The preparation method comprises the following steps: adding the
polyvinyl chloride into a stirrer; respectively adding half of the
dibutyl phthalate, half of the chlorinated paraffin-52, half of the stabilizing agent and half of the
stearic acid while stirring; adding the rest of the
dibutyl phthalate, the rest of the chlorinated paraffin-52, the rest of the stabilizing agent and the rest of the
stearic acid when the temperature of the materials is 50 DEG C; adding the lame retardant and the
carbon black when the temperature of the materials is 75-80 DEG C; stopping stirring when the temperature of the materials is 85-90 DEG C; granulating to obtain plastic
soft layer granular materials when the temperature of the materials is cooled to 50-60 DEG C; and feeding a mold and the plastic
soft layer granular materials into an extruder and preparing a product.The plastic hose for the mine, provided by the invention, has the advantages of big
crankshaft radius, easiness for bending, high antistatic coefficient and good
flame-retardant effect, good sealing effect; and the preparation method is simple and convenient and is convenient to operate.