High-pressure hose is used in mine hydraulic support, oil field development, construction, lifting transportation, metallurgical forging, mining equipment, ships, injection molding machinery, agricultural machinery, all kinds of machine tools and industrial sectors of the mechanized, automated hydraulic system with a certain pressure And temperature of petroleum-based (such as mineral oil, soluble oil, hydraulic oil, fuel oil, lubricants) and water-based liquids (such as emulsion, oil and water emulsion, water) and liquid-driven pipeline, the use of different high pressure Hoses need to use different rubber production, including nitrile rubber reclaim can be used for the production of oil resistance demanding oil drilling hose.
The use of nitrile rubber reclaimed rubber production of high pressure oil hose (oil drilling hose), the choice of nitrile rubber reclamation, curing system design, antioxidant selection, reinforcing agent selection, plasticizer selection and other aspects need careful consideration, Make the most reasonable formula:
1, the choice of curing system: The use of nitrile rubber reclaimed rubber production of high-pressure hose, the general choice of sulfur / accelerator curing system, by adjusting the amount of sulfur to adjust the high-pressure hose set tensile stress and hardness; usually sulfur dosage 0.5-2.0 copies , Use of thiuram and thiazole accelerators.
2, anti-aging agent: nitrile reclaimed rubber high pressure oil hose formula, the amount of antioxidant generally 1.5-2.0 copies, not more than 5 copies, but also with 1-2 copies of paraffin and nitrile rubber reclaimed rubber hose formula Good use of anti-aging agent is not easy to be extracted by the oil, without affecting the other properties of rubber products under the premise of appropriate increase in dosage.
3, reinforcing filler: nitrile rubber reclaimed rubber production when the hose can be formulated in the product to add a certain amount of carbon black, calcium carbonate, talc and other reinforcing agents to improve the rubber processing technology to improve the high pressure resistant oil hose resistance Abrasion and aging resistance; under normal circumstances, the amount of high-pressure oil hose Reinforcing agent shall not exceed 60, the amount of over the General Assembly resulting in rubber compound hardening, processing difficult situation.
4, the use of nitrile rubber reclaimed rubber production of high-pressure oil hose, you also need to add a variety of plasticizers, softeners, nitrile rubber to reduce the viscosity of reclaimed rubber, improve plasticity and improve process performance.
5, in order to improve the performance of nitrile rubber reclaimed, but also in the nitrile reclaimed rubber high pressure oil hose formulations add a small amount of natural rubber, the amount of 15 or less, to improve rubber processing and low temperature resistance; a small amount of natural rubber in Nitrile reclaimed rubber product formulations can also play a role in tackifying plasticization. (Under normal circumstances, the lower the acrylonitrile content of acrylonitrile reclaimed rubber, the better the compatibility with natural rubber)
Produced by different manufacturers of high-pressure oil hose performance indicators are different, the use of nitrile rubber reclaimed products and product formulations are also very different.
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