| 摘要 |
The invention refers to stoppers for closing bottles. The stopper for closing bottles, more particularly wine bottles, is made of synthetic material, having a cylindrical shape to be inserted in the bottle neck. Into it there is made at least a through longitudinal duct (2), wherein in the middle part there is transversely arranged at least a membrane (3) with microholes permitting the passage of oxygen from the bottle interior to the outer ambient and viceversa, at the same time the membrane is fixed inside a tube (4), placed into the through duct. The size of the microholes is chosen so as to avoid the passage of liquid and constitutes 0,01à0,5 Ám. The membrane is made of acrylic copolymer film fixed onto a support of nonwoven fabric, and the synthetic material of which the stopper is made, possess to a group of polyethylene resins into which a foaming agent was added. |
