Rubber hose and preparation method thereof

Abstract

The invention relates to the technical field of fireproof materials, in particular to a rubber hose and a preparation method thereof. The rubber hose sequentially comprises a lining layer, a first steel wire framework layer, a middle rubber bonding layer, a second steel wire framework layer and an outer rubber layer in the pipe diameter direction; the lining layer is prepared from nitrile rubber and NBR / PVC rubber and plastic alloy; the first steel wire framework layer is compounded on the lining layer; the middle rubber bonding layer is compounded on the steel wire framework layer; the middle rubber bonding layer is prepared from nitrile rubber and chloroprene rubber; the second steel wire framework layer is compounded on the middle rubber bonding layer; the outer rubber layer is compounded on the second steel wire framework layer; the outer rubber layer is prepared from nitrile rubber, rubber and plastic alloy and a compound flame retardant; the compound flame retardant is prepared from the following components in parts by weight: 12 to 20 parts of polyphosphamide, 10 to 17 parts of pentaerythritol, 7 to 9 parts of melamine, 20 to 30 parts of antimony trioxide, 24 to 30 parts of white carbon black, 1-5 parts of a silane coupling agent, and 2 to 4 parts of tricresyl phosphate. The rubber hose has excellent fire resistance and ultrahigh pressure performance.

Description

technical field [0001] The invention relates to the technical field of fireproof materials, in particular to a rubber hose and a preparation method thereof. Background technique [0002] Steel wire braided rubber hose is mainly used in aircraft fuel, mine hydraulic pressure, oil field, construction machinery and other equipment to transport high temperature and high pressure kerosene, engine oil and other flammable and explosive media. Ordinary hoses are difficult to withstand flames, and once they break, the liquid conveyed inside will leak, adding fuel to the fire and increasing the fire, causing the accident to further expand. In order to ensure safety, a high-pressure multifunctional composite hose with fire resistance is designed. [0003] The existing fire-resistant hose generally adopts a multi-layer structure design, and the fire-resistant performance of the hose is realized through additional layers such as fire-resistant and flame-retardant layers, armored protect...

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Problems solved by technology

[0003] The existing fire-resistant hose generally adopts a multi-layer structure design, and the fire-resistant performance of the hose is realized through additional layers such as fire-resistant and flame-retardant layers, armored protective layers, and protective sleeves, and an additional outer coating layer with specific properties is added to solve the problem of the rubber outer coating layer. Insufficient, the fire resistance of the high-pressure hose cannot be solved through the mixing of rubber materials, let alone the bonding between the connecting layers of the high-pressure hose

Or the existing rubber has reached the level of fire resistance and heat insulation, but the joints have no heat insulation protection, and the metal joints have excellent heat conduction and heat transfer performance, and good heat insulation effects cannot be achieved only by the heat insulation of the braided skeleton layer

The high temperature will finally act on the adhesive layer and inner rubber layer in the hose through metal heat transfer. Due to the high pressure resistance and oil resistance design of the inner rubber layer, it cannot withstand the high temperature transferred by the metal, which will cause rubber aging, cracking, carbonization and loss of elasticity, and joints will not be able to Tightened at both ends of the hose, it will eventually cause leakage at the joint, or even the joint will come off under the action of high pressure pulse

[0004] Furthermore, the existing single flame retardant blending effect is poor; the reaction of compound flame retardants in the market cannot be controlled, and cannot be applied in existing working conditions, and the cost is high; the product structure process is complicated, and the molding process is complicated. The cost is higher than that of rubber materials; the outer coating layer materials are mostly non-rubber materials such as asbestos heat insulation layer, heat insulation protective sleeve, fireproof coating, etc., which have poor softness, small bending radius of the hose, and poor low temperature resistance; the flame retardant outer coating layer Adhesion difference between

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