| 摘要 |
The invention relates to a closing device made by injection, and meant to be put into or removed from the neck of a bottle or another liquid container, and which is made of a thermoplastic elastomer namely styrene block copolymer, expanded with an expansion agent, such as azodicarbonamide or sodium hydrogen carbonate used in ratio of 1 to 5% by weight in a mixture with elastomer and which optionally contains filling material, colouring agent and lubricant and is in shape of a cork with round edges, with a radius of curvature preferably convex, sized to fit a bottle neck such as wine bottle The invention also discloses the process of manufacturing this closing device by injection |
