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Rubber Joint and Pipe Fittings Sterilization

2013/7/1 15:11:29      Click£º

On the present market, the most common rubber joint pipe fittings are EPDM, NBR, silicone rubber, butyl rubber, natural rubber, viton rubber and neoprene material, etc. Their characteristics are different, so the applications are different. Butyl rubber, for example, with high elastic characteristics, can be made in a flexible rubber joint; Silicon rubber is used to do all kinds of rubber elbow pipe fittings; EPDM can be made into high temperature resistant, acid and alkali resistant rubber joint, in a lot of rubber pipe in the design manual has a detailed review about their performance, go here.

In rubber pipe, many rubber joints used in water supply and drainage pipe are required aseptic, non-toxic, and harmless before installation. So one or more strict sterilization processing are necessary. Even the rubber joint produced in the clean room, can only guarantee that the product contains relatively less foreign substances, finally still need the sterilization processing. So, in addition to consider whether or not the material resistance using the environment, whether can provide the pipeline safety seal and other factors, but also consider the rubber joint factory whether have the sterilization process, the purpose of sterilization is to kill the rubber joint sphere attached microorganisms, including bacteria, viruses and mold, etc. There are many kinds of sterilization methods.

Rubber joint use of gamma ray radiation sterilization strictly. Gamma rays are usually generated by radioactive isotope cobalt 60. The method can be at room temperature, volatile and not damage the rubber joint and heat sensitive material. Gamma radiation can result in changes of the molecular structure of rubber joint, causing material to harden and become fragile, discoloration, loss of elasticity, etc. After rubber by gamma radiation, usually there are two reactions: one is broken happens and to reduce the molecular weight; 2 it is to produce macromolecular radicals and coupled with each other increase the crosslink density. In the process of polymer materials exposed to radiation, chain scission and crosslink mechanism exist at the same time, the general is given priority to with a. In 0-200 kgy was found after gamma radiation, fluorine rubber, nitrile rubber and nitrile rubber hardness of cyanide and stretching stress increase, and tensile elongation decreased. Tested by the test data, this a few of the rubber after affected by gamma radiation, are likely to give priority to with cross linking reaction; That these changes may be due to the rubber crosslink density increase.

High pressure steam sterilization method is using high pressure saturated steam. Its operation duration and temperature range depends on the product performance and requirements. Under the common condition is at 121 ¡ã C for 15 minutes or longer. High pressure steam sterilization requirements must be able to fully contact rubber joint surface of sphere for sterilization.


Every rubber joint through special disinfection sterilization processing, its characteristics:

1. The rubber joint materials are derived from natural rubber, organic acids, phenols content is rich.

2. Non-toxic and pollution-free, no pollution, no pollution, pipeline water quality, it does not hurt the skin, non-toxic side effects for human.

3. Product non-corrosive, safe and reliable, and burst pressure strong work pressure.

Rubber joint of a tolerance depends on the type of sterilization and formula. the final product sterilization method decides appropriate rubber parts. In other words, if there are many kinds of sterilization method can be used, it is necessary to take into account the rubber joint installation tolerance of the parts in the pipeline. Sometimes, because of the special design products, including rubber joint used for pipe need not be affected by the maximum dose. So ultimately depends on the actual test to check whether rubber joints conform to the requirements of pipeline transport medium.