Thermos bottle on the floor of the small point is how to play a role
Thermos heat preservation principle is the inner and outer bravery is separated, by the middle of the vacuum heat preservation effect. The tank outer layer is made of mercury, mercury is the only room temperature of liquid metal. Is the air blowing out of the tank
Sandwich is a vacuum of the vacuum flask, the small nozzle is left in the wake of the vacuum seal, don't get off, there is no heat preservation effect!
It is made after the completion of the left, nothing, but not broken. Otherwise you will lose heat preservation function.
In the process of production used for vacuum. For vacuum flask is double deck structure, is a vacuum between layer and layer, the sharp mouth is in the process of production used for pumping air into vacuum state, again after finished the vacuum sealed it, so the little tip never broken, otherwise can't heat preservation
Vacuum flask is double deck glass structure, its forming by blowing into the air, vacuum flask must be pulled out of the air inside after molding, vacuum, can heat preservation. Used to blow molding, in the process of production at the end of the production used for pumping air into vacuum state, again after finished the vacuum sintering block, it is formed a small tip. So the little tip don't break, or between two layers of the air out of heat preservation. Now inside the supermarket or mall sell double deck glass vacuum cup is also using this principle, only when the seal in order to beautiful and safe, the sealing is smooth, is no longer a small tip.
