The fire hose is a special hose used to transport fire extinguishing agents (such as water, foam, etc.), which is generally composed of an inner rubber layer, a reinforcing layer and an outer rubber layer, and the rubber part is generally processed with natural rubber, styrene-butadiene rubber and butadiene rubber as the main raw materials. Tire reclaimed rubber has the basic performance characteristics of rubber, good compatibility with natural rubber and synthetic rubber, and can be appropriately mixed into the production of inner rubber and outer rubber of fire hoses to reduce the cost of raw materials.
1. Application formula of tire reclaimed rubber in the inner rubber layer of fire hose
The rubber layer in the fire hose is in direct contact with and transports the medium such as fire fighting water, which requires the inner surface to be smooth and flawless, with good water resistance, corrosion resistance, sealing and certain corrosion resistance, so as to prevent the erosion caused by the conveying medium; Generally, it is made of natural rubber, natural rubber/styrene-butadiene rubber and processed with rubber; The appropriate amount of tire reclaimed rubber needs to be adjusted.
Natural rubber/styrene-butadiene rubber/tire reclaimed rubber combined to produce fire hose inner rubber layer formula: 30 parts of natural rubber, 30 parts of styrene-butadiene rubber, 40 parts of tire reclaimed rubber, 5 parts of zinc oxide, 1.5 parts of stearic acid, 0.8 parts of antioxidant J, 1.2 parts of antioxidant DFC, 48 parts of high wear-resistant carbon black, 75 parts of clay, 3 parts of coumaron resin, 2.5 parts of heavy oil, 0.3 parts of accelerator M, 0.88 parts of accelerator DM, 1.62 parts of sulfur; Total 239.8 copies.
2. Application formula of tire reclaimed rubber in the outer rubber layer of fire hose
The outer rubber layer of the fire hose should play the role of protecting the reinforcing layer and the inner rubber layer, requiring certain wear-resistant, weather-resistant and other properties, and is mostly processed with natural rubber/styrene-butadiene rubber and rubber as the main raw material, and the reasonable use of tire reclaimed rubber can not only reduce the cost of raw materials, but also improve the aging resistance and processing technology performance of the fire outer rubber layer.
Natural rubber/styrene-butadiene rubber/tire reclaimed rubber combined to produce fire hose outer rubber layer formula: 45 parts of natural rubber, 20 parts of styrene-butadiene rubber, 35 parts of tire reclaimed rubber, 4 parts of zinc oxide, 1.66 parts of stearic acid, 0.85 parts of antioxidant J, 1.2 parts of antioxidant DFC, 1 part of paraffin, 13 parts of high wear-resistant carbon black, 10 parts of semi-reinforcing carbon black, 67 parts of light calcium carbonate, 3.3 parts of coumarone resin, 3.3 parts of heavy oil, 0.32 parts of accelerator M, 0.85 parts of accelerator DM, sulfur 1.52 copies; Total 208 copies.
Natural rubber has good elasticity, high mechanical strength, low temperature resistance, tear resistance, styrene-butadiene rubber wear-resistant, aging-resistant, heat-resistant performance, tire reclaimed rubber retains some of the performance characteristics of natural rubber E4LYY89 and styrene-butadiene rubber and low price, good processing performance, three kinds of rubber combined with the production of fire hose inner rubber layer, outer rubber layer, can give the hose good pressure resistance, wear resistance, aging resistance and elasticity, improve processing performance, reduce raw material costs.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits