Performance standard for oil resistance of vulcanizates
2022-04-08 15:40:20
In addition to meeting the basic mechanical performance requirements as a rubber hose, the oil-resistant hose should also meet the oil-resistant performance requirements. The oil resistance of rubber refers to the ability of the vulcanizate to resist oil, that is, when the rubber product is in contact with various oils for a long time, the oil can penetrate into the rubber to expand (or increase its volume), or the oil medium Soluble compounding agents (such as plasticizers) can be drawn from the vulcanizate, causing the vulcanizate to shrink (or decrease in volume). On the afternoon of April 8, 2020, Gao Xidong, Vice Chairman of the Standing Committee of the Municipal Party Committee, and Wu Yupei, Secretary of the Party Development Working Committee, checked fire safety and continued to work. Zhao Hongliang, Chairman and CEO of Litong Hydraulic Technology Co., Ltd., followed the leaders to visit the Litong Exhibition Hall, and gave a brief introduction to the three pillars of Litong Hydraulic Technology Co., Ltd.: industrial hydraulic hoses and fittings, industrial hoses and fittings, compound rubber and Sealing products and their representative products are systematically described. On March 1, 2014, it was awarded the top ten hoses of 2013-2014, and the pulse of Litong hydraulic winding hose exceeded 1 million times. On March 8, 2014, Litong hydraulic chain Changsha flagship store opened. On April 1, 2014, the company launched the "Artery" series products, and the quality of the hose has reached a new level.
On April 15, 2014, Litong Hydraulics participated in the 2014 China Import and Export Fair. The company actively attracts multi-disciplinary talents and focuses on the research and development of new materials. With technical support, Litongcai can continue to maintain the ability of research and development and innovation, and the ability to export advanced products. It recruits professional counterparts directly from colleges and universities all year round, and has established CNAS certified by China. The certification laboratory has market-approved research and development achievements, and has been awarded as an innovative enterprise in Luohe City. The company develops a variety of high-end rubber compounds to ensure high-end products. At the same time, it introduces high-end experimental equipment and production equipment from Germany. The oil used is organic oil, hydraulic oil, engine oil, fuel oil and other oils. The evaluation of oil resistance is usually to measure the percentage change in volume (or mass) of vulcanizate in oil after soaking at a specified temperature and time, or the percentage change (or difference) in hardness with standard test oil. The oil resistance of vulcanizates depends primarily on the chemical properties of the rubber, the vulcanization system, and the oil used.
Chemical pipelines are used for chemical transportation, with excellent performance and resistance to various strong corrosive chemicals. Especially suitable for the delivery of acids, bases, copper, aldehydes, esters, aromatics, aliphatic hydrocarbons. Chemical lines are suction and discharge hoses that are particularly flexible in their bending properties. Suitable products can be selected according to the size of the hose and the corrosiveness of the chemicals being transported to ensure the durability of the hose. The material of the chemical fiber tube is also different, and there are certain differences in the use process.
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