What is the thermos bottle stopper made of wood?
This kind of material is resistant to decay and chemical resistance. Therefore, it can not play a chemical role in water, fat, gasoline, organic acid, salt, ester and so on, except for the corrosion of concentrated nitric acid, concentrated sulfuric acid, chlorine and iodine. It is widely used, such as bottle stopper, freezing equipment, insulation layer, life buoy, soundproof board and so on.
This structure allows the cork with elastic, sealing, heat insulation, sound insulation, electrical insulation and frictional resistance is very good, and non-toxic, tasteless, the proportion of small, soft and not easy to fire and other advantages, is still not man-made products worthy rival. In chemical properties, ester mixtures formed from several hydroxy fatty acids and phenolic acids are characteristic components of cork, collectively referred to as cork.
Cork (English professional presentation: cork; phellem), commonly known as cork, cork, cork. The skin product of cork layers very developed species, surface protective tissue of stem and root growth after. Ancient Egypt, Greece, and Rome were used to make nets, floats, insoles, stoppers, etc.. There were records of cork in the spring and Autumn Period in china. The main production of cork cork tree oak, Quercus variabilis. Usually 20 years or above, more than 20 cm DBH plants can be carried out by first stripping the skin, skin or skin called the primary. After every 10 to 20 years before stripping, the skin that recycled leather, thickness more than 2 cm in.
