Production capacity and output of my country's rubber hose industry
The rubber hose industry has a history of 40 years in my country, and it has now become one of the main industries in my country's rubber industry. In recent years, with the rapid development of my country's automobile manufacturing, oil exploration, agricultural water conservancy, marine chemical industry and construction industries, the demand for rubber hoses has increased day by day. At the same time, it is close to international standards, which promotes the continuous improvement of traditional rubber hose technology, production methods, standards and structure, and a number of rubber hose backbone enterprises with advanced equipment and strong comprehensive strength have emerged. According to incomplete statistics, as of the end of 1996, there were 148 production plants at or above the county and city level in the rubber hose industry in my country, and there were also a batch of township rubber hose enterprises, at about 300. If the output of rubber hoses in township enterprises is included, the annual production capacity exceeds 180 million standard meters of rubber hoses. There are 30 manufacturers in my country that produce compressed air rubber hoses, water delivery, general-purpose rubber rubber hoses, fabric-reinforced water-absorbing rubber hoses, oxygen, acetylene rubber hoses for welding, and dilute acid-base rubber hoses. The total output of rubber hose production plants annually exceeds 60 million standard meters. The annual output of rubber hoses in my country was 80 million standard meters in 1997 and 98 million standard meters in 1998. At present, the proportion of rubber hoses reinforced by steel wire, fiber braided or wound in my country's rubber hose industry has been greatly increased. Compared with the output of cloth hose, it is 60% to 40%. The production capacity is above 180 million standard meters, which basically meets the domestic demand, and the production capacity is relatively large, and there are still a certain number of rubber hoses that can be exported.
my country's rubber hose industry production status
my country's rubber hose industry has made considerable progress in its production in the past ten years. The variety and quantity of elastomers for rubber hoses, steel wires and fibers for reinforcement have also increased significantly. At present, there are dozens of rubbers and elastomers used in the production of rubber hoses. The commonly used ones are: natural rubber, styrene butadiene rubber, EPDM, nitrile rubber, hydrogenated nitrile rubber, neoprene, Chlorosulfonated polyethylene, chlorinated polyethylene and fluorine rubber. In addition, some thermoplastic elastomers, such as ethylene-acrylic acid elastomers and polyacrylic acid elastomers, have also been used. This shows that the types of rubber hoses produced have increased significantly, and there are more choices of reinforcing materials for rubber hoses. The grade of fiber and steel wire can basically meet the needs of rubber hose production. In the production of air and water low-pressure rubber hoses, rayon and polyester fibers are still used as reinforcing materials, and steel wires are still used as reinforcing materials for rubber hoses in the production of medium and high-pressure hydraulic rubber hoses. The selected steel wire is Depending on the pressure and size of the hydraulic rubber hose produced, the diameter of the steel wire varies from 0.20mm to 0.80mm. In the production of large-caliber rubber hoses, steel cords and flat steel wires are also used as reinforcement materials, which have high strength, compactness and fatigue resistance.
From the perspective of the rubber hose industry, the molding process used is the same as abroad. It is also the hard core method, the soft core method and the coreless method. The soft core method and the coreless method are used to produce rubber hoses. many. From the perspective of the vulcanization process, most of them still use nylon water-wrapped cloth for steam vulcanization. In the past ten years, nylon water-covered cloth has replaced pure cotton water-covered cloth. The use of nylon cloth tape has been successful in many domestic hose manufacturers. This is a measure to improve the appearance quality of rubber hoses. The appearance quality of the rubber hose wrapped with nylon water-wrapped cloth fully meets the requirements of the HG2185-91 rubber hose appearance quality standard. With the increase in the amount of synthetic rubber, hydraulic rubber hoses, high-pressure resin rubber hoses, rubber hoses for oil fields, rubber hoses for the automotive industry, and large-caliber and long-length rubber hoses have all been industrialized one after another. The proportion of fiber weaving and winding structure has increased, and the gap with the advanced level of the world rubber hose industry has been greatly shortened.