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Low-smoke and halogen-free fire-retardant rubber material for covering layer of conveyor belt and preparation method thereof

A technology of flame-retardant rubber and covering layer, which is applied in the field of low-smoke halogen-free flame-retardant rubber material for conveyor belt covering layer and its preparation, which can solve the problems of affecting the conveying efficiency of the conveyor belt, the difficulty of reducing the resistance, and the increase of smoke concentration. Achieve excellent surface modification, improve dispersion, and improve service life

Inactive Publication Date: 2009-11-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding an appropriate amount of conductive carbon black to the traditional carbon black reinforced rubber system can effectively reduce the surface resistance, but adding too much carbon black to the system with a large amount of inorganic hydroxide will cause the hardness to be too high and affect the transportation Belt Conveying Efficiency
Another effective way to reduce surface resistance is to add antistatic agents. Since most antistatic agents are plasticizers at the same time, they can reduce surface resistance and hardness. However, when filling a large amount of hydroxide system The surface resistance can be reduced only by adding an antistatic agent, but it is difficult to reduce the resistance to an ideal range, and if the amount of antistatic agent added is too large, the smoke concentration will increase significantly when the material is burned, which does not meet the requirements of low smoke

Method used

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  • Low-smoke and halogen-free fire-retardant rubber material for covering layer of conveyor belt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The formulation system is as follows:

[0033] Raw rubber matrix: nitrile rubber (230S) 100

[0034] Nano-inorganic filler: nano-magnesium hydroxide (particle size 150-200 nm) 90

[0035] Modifier: Silane KH-845-4 5

[0036] Flame Retardant Synergist: Red Phosphorus 6

[0037] Expandable graphite (commercially available) 3.5

[0038] Antistatic plasticizer: conductive carbon black (commercially available) 5

[0039] TP-90B 20

[0040] Vulcanizing agent: Sulfur 1.5

[0041] Activator: Zinc Oxide 5

[0042] stearic acid 2

[0043] Vulcanization accelerator: CZ 1.2

[0044] DM 1

[0045] Antiaging agent: RD 1

[0046] 4010NA 2

[0047] The nano-magnesium hydroxide modification method is to dilute the silane KH-845-4 with 3 times the mass of acetone, mix it with nano-magnesium hydroxide, stir evenly, and then dry.

[0048] On the 6-inch open-type rubber mixing machine, adjust the roll distance...

Embodiment 2

[0050] The formulation system is as follows:

[0051] Raw rubber matrix: EP-35 100

[0052] Nano-inorganic filler: nano-magnesium hydroxide (particle size 150-200 nm) 130

[0053] Modifier: Si69 10

[0054] Flame Retardant Synergist: Red Phosphorus 7

[0055] Expandable graphite 3

[0056] Antistatic Plasticizer: Conductive Carbon Black 5

[0057] TP-90B 40

[0058] Vulcanizing agent: Sulfur 1.5

[0059] Activator: Zinc Oxide 5

[0060] stearic acid 2

[0061] Vulcanization Accelerator: CZ 2

[0062] DM 1.5

[0063] Antiaging agent: RD 1

[0064] MC 2.5

[0065] The modification method of nano-magnesium hydroxide is to dilute Si69 with 3 times the mass of acetone, mix it with nano-magnesium hydroxide, stir it evenly, and then dry it.

[0066] On the 6-inch open-type rubber mixing machine, adjust the roll distance to be less than 0.2mm and pass three times, then increase the roll distance to about 3mm, and th...

Embodiment 3

[0068] The formulation system is as follows:

[0069] Raw rubber matrix: nitrile rubber (220S) 100

[0070] Nano-inorganic filler: nano-aluminum hydroxide (particle size 150-200 nm) 60

[0071] Modifier: Si69 10

[0072] Flame Retardant Synergist: Red Phosphorus 10

[0073] Expandable graphite 2

[0074] Antistatic Plasticizer: Conductive Carbon Black 15

[0075] TP-90B 20

[0076] Vulcanizing agent: Sulfur 1.5

[0077] Activator: Zinc Oxide 5

[0078] stearic acid 2

[0079] Vulcanization Accelerator: CZ 2

[0080] DM 1

[0081] Antiaging agent RD 1.5

[0082] 4010 2

[0083] The above nano-aluminum hydroxide modification method is to dilute Si69 with 3 times the mass of acetone and mix it with nano-aluminum hydroxide, stir evenly and then dry.

[0084] On the 6-inch open-type rubber mixing machine, adjust the roll distance to be less than 0.2mm and pass three times, then increase the roll dista...

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Abstract

The invention relates to a low-smoke and halogen-free fire-retardant rubber material for a covering layer of a conveyor belt and a preparation method thereof. The preparation method comprises the following steps: filling a rubber system by adopting nano hydroxid, carrying out surface modification on nano hydroxid, matching proper fire-retardant synergist and antistatic plasticizer, and obtaining the low-smoke and halogen-free fire-retardant rubber material. The fire retardant property, the mechanical property and the antistatic property of the low-smoke and halogen-free fire-retardant rubber material all meet the requirement of a low-smoke and halogen-free fire-retardant conveyor belt covering rubber material used for underground coal mines.

Description

technical field [0001] The invention relates to a low-smoke, halogen-free, flame-retardant rubber material for a conveyor belt covering layer and a preparation method thereof. Background technique [0002] Flame-retardant conveyor belts are mainly used for the transportation of coal mine materials, especially in underground coal mines. Due to the large amount of combustible gas and the limited space with poor air circulation, the safety performance requirements for flame-retardant conveyor belts are very high. At present, the conveyor belts used in underground coal mines are mostly based on halogen-containing substrates such as PVC or PVG (PVC / NBR combined) or by adding halogen-containing flame-retardant systems. Although good flame-retardant effects have been achieved and flame-retardant properties can be basically achieved And the balance of mechanical properties and processing properties. However, there are still disadvantages of low strength, short service life, and low...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L9/06C08L9/02C08L23/16C08K13/06C08K9/06C08K3/22C08K3/02C08K3/04B29C35/02B65G15/38B29L7/00
Inventor 田明尹云山张立群包志方陶小明李晓林
Owner BEIJING UNIV OF CHEM TECH
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