A kind of plastic hose for mine and its preparation method

Abstract

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.

Description

technical field [0001] The invention relates to a hose and a preparation method, in particular to a plastic hose for mines and a preparation method thereof. technical background [0002] Gas is formed by anaerobic decomposition of cellulose and organic matter in the early stage of coal formation, and continues to be generated under high temperature and high pressure. Gas is insoluble in water, and its permeability is 1.6 times that of air. It cannot maintain the normal breathing of people and animals. When it reaches a certain concentration, it will cause people and animals to suffocate and die. The explosion caused casualties and serious economic losses. [0003] At present, most of the pipes used for gas extraction in underground mines are PE pipes, hard pipes or polyethylene pipes. Due to the bending of underground roads in mines, these pipes are not easy to bend, so they cannot be used in underground mines, and the sealing effect is poor, and gas is prone to occur. Lea...

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Problems solved by technology

[0003] At present, most of the pipes used for gas extraction in underground mines are PE pipes, hard pipes or polyethylene pipes. Due to the bending of underground roads in mines, these pipes are not easy to bend, so they cannot be used in underground mines, and the sealing effect is poor, and gas is prone to occur. Leakage; and high temperature conditions cannot occur in mines, and these pipes do not have antistatic and flame-retardant effects. Once static electricity is generated due to friction, the pipes are prone to burning, and because the pipes do not have the ability of flame retardancy and the gas is flammable and flammable. Explosive and other properties, prone to gas combustion or gas explosion, causing casualties, increasing production costs, and reducing economic benefits