What are the black O sealing rings used on the faucet? Are they poisonous?
Large manufacturers need good sealing, graphite material is used, and the use of a long time without rust!
First, the faucet O ring is used to seal.Two, the tap pressure is very low (relative to industry), manufacturers consider the competitiveness, the user is considering the life. NBR is resilient, inexpensive and easy to obtain.Three, at room temperature, nitrile rubber is non-toxic, and dissolved in oil will dissolve nitrile rubber, in 70 degrees of water temperature, began to crack a small amount, at 120 degrees when a large amount of cracking.Four, no one will tell you the real reason why such a leader has been caught.
It's silicone. It's non-toxic and tasteless.Fluorine glue should not, fluorine glue more expensive than silica gel; nitrile should also not, nitrile odor, and the price is not cheaper than silica gel.You can judge for yourself:1., smell, silicone basically no flavor;2., burn, silicone burning without black smoke, ashes are white powder;3., if the surface looks oily feeling, certainly not silicone.
