FYZB-3A sorbent is a new-type special sorbent developed on the basis of 3A molecular sieve for the special requirement of double-layer vacuum glass in air conditioning rooms, trains, automobiles and hotels. After being filled in the sealing ring of double-layer vacuum glass doors and windows, it can adsorb the moisture in the air and some air inside to make it vacuum, so that it will not bring about the condensation or icing, and keep high transparency and good thermal insulating effect when there are changes between cold and hot. It is extensively used abroad and highly regarded by customers.