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The silicone tube can use alkaline disinfection?
Generally need to disinfect the silicon rubber tubes are food grade or medical grade, is produced by platinum sulfide high temperature catalytic production. General price is relatively high.
Recently, a client when it comes to a problem, they with sodium hydroxide to medical silica gel tube disinfection is found to produce white flocculent material. What is the reason? Is not the silicone tube can not use alkaline disinfection, or silicone tube quality problem? Below small make up to discuss the reason of this problem.
Generally speaking, the medical silicon rubber tube needs to meet the national standard of food hygiene standards, the United States FDA food hygiene class 2600 regulations, the European Union 2011 food hygiene level of relevant regulations and standards. Three regulations related detection methods and indicators are different, but they are international generic food hygiene standards, the domestic general will follow the European Union or the United States to detect the relevant testing standards. The United States to pay more attention to the detection of the total amount of material migration test, the EU's testing standards pay more attention to heavy metals and the migration of hazardous substances. Xiao Bian temporarily exclude this conjecture.
Secondly, small guess may be found with sodium hydroxide alkali silica gel reaction. Xiao Bian made 3 experiments, one is ice water, one is warm water, one is boiling water. Found after half an hour, the ice in a silica gel tube without any strange, and the warm water in the silicone tube above has a small amount of white flocculent material. Finally, the amazing found the boiling water in the silica gel tube is filled with white flocculent material.
The above experiments also confirmed that the small series of view is correct, sodium hydroxide is at room temperature and the silica gel will be a slight reaction, the production of sodium silicate solution, the high temperature will be intense reaction, and the production of sodium silicate weak soluble in water, will produce the phenomenon of crystallization precipitation.
Therefore, silicone tube can be disinfected with alkali, just with alkali cleaning and disinfection of the silicone tube and need disinfection or water treatment at room temperature and high temperature will react and produce a white flocculent material, white flocculent material is production of sodium silicate crystallization.
In this paper, from Shenzhen City, Qi Yu Silicone Rubber Co., Ltd.: http://www.szhcty.com/news_v.asp? Id=625
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