Fire retardant cushion rubber of fire retardant canvas laminated core conveyer belt and preparation method thereof

Abstract

The invention relates to a preparation method for fire retardant cushion rubber of a fire retardant canvas laminated core conveyer belt, which is characterized by comprising the following steps: firstly plasticating nitrile rubber; then respectively putting plasticize nitrile rubber, stearic acid, petroleum softener, meta resol thickening agent, semi-strengthening carbon black, high wear-resistant carbon black, white carbon black, pot clay, polyvinyl chloride plastic paste, zinc oxide, magnesium oxide, aluminium hydroxide and the like for banburying; and then adding an accelerating agent for overturning milling, hot milling and sheeting, arranging layer cloth on rolled rubber sheets, and rolling the rubber sheets for forming the conveyor belt. The cushion rubber of the fire retardant laminated core conveyer belt in underground coal mines is used to make the fire retardant laminated core conveyer belt in the underground coal mines inherit the prior mechanical property of a common canvas laminated core conveyer belt and maintain the good fire retardance of a whole woven core conveyer belt; and the preparation method is simple and has easy operation.

Description

technical field [0001] The invention relates to a flame-retardant buffer glue for a flame-retardant canvas laminated core conveyor belt used in underground coal mines and a preparation method thereof. It is used in the production of flame-retardant conveyor belts for underground coal mines that meet the MT830-1999 standard. Background technique [0002] The roadway transportation (also known as trough transportation) of the mining face in the coal mine is widely used in the transportation mode of the belt conveyor. Due to the gradual retraction of the conveying distance during the mining process, the configured conveyor belt needs to be shortened and reconnected many times. The fabric core conveyor belt is the easiest to cut and fast to connect, so it is widely used on the conveyor of the coal mine mining roadway. [0003] Before the 1970s, the conveyor belts used for trough conveying were ordinary canvas core conveyor belts. This kind of conveyor belt has good mechanical...

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the high softening point and high modulus of polyvinyl chloride, the hardness of the conveyor belt made is relatively high. When the temperature is below -10°C, the belt body is stiff and has poor troughability and is easy to break, which seriously affects normal use.

[0006] 2. The wear resistance of polyvinyl chloride plastic is poor, which is only equivalent to 1 / 5 of rubber material; when using rubber material to stick the surface, due to the excessive difference in modulus between the two phases, the thickness of the rubber covering glue is limited within 2mm, exceeding this limit Then the cover glue will fall off during use

This kind of structural defect will cause the poor running stability of the conveyor belt, and it is easy to deviate, which will affect the normal operation of the conveyor belt.

[0008] 4. This kind of belt body, especially the high-grade belt body, can only be connected mechanically, and the joint strength is only equivalent to 40% of the belt strength, which is easy to damage and requires a lot of maintenance