| abstract |
The invention discloses a rubber material for preparing inner and outer rubber or an intermediate film of a railway brake pipe, which comprises the following raw materials in parts by weight: 100 parts of base material, 3-5.5 parts of anti-aging agent, and 60-120 parts of carbon black , 10-30 parts of white carbon black, 5 parts of zinc oxide, 1.5-2 parts of stearic acid, 5-20 parts of plasticizer, 3-5 parts of coupling agent, 5-8 parts of binder, 2-5 parts Sulfur, 1-2 parts of accelerator; the base material is one or more of EPDM rubber, natural rubber, butadiene rubber, and nitrile rubber. The invention also discloses a railway brake pipe, which sequentially includes an inner rubber layer and an outer rubber layer from the inside to the outside. The inner rubber layer and the outer rubber layer are provided with three braided layers, and a braided layer is arranged between two adjacent braided layers. There is a middle rubber layer; the inner rubber layer, the middle rubber layer and the outer rubber layer are all extruded from rubber material, and the braided layer is woven from polyester thread. The normal temperature stiffness, low temperature flexibility, burst strength, weather resistance and aging resistance of railway brake hoses are all better than neoprene hoses. |