New compositions based on a silica modified with organic groups, their preparation and their application, in particular as protonic conductors

摘要

PCT No. PCT/FR87/00241 Sec. 371 Date Mar. 2, 1988 Sec. 102(e) Date Mar. 2, 1988 PCT Filed Jun. 23, 1987 PCT Pub. No. WO88/00162 PCT Pub. Date Jan. 14, 1988.A device for perforating a pack made of flexible synthetic material and having a closing-off and pouring assembly including a cylindrical shank and a plug for interacting with the shank and for cutting and perforating the pack in order to access a liquid contained in the pack, is improved by providing the shank with a reinforcement attached to and extending from the base of the shank, partially inwardly toward the center of the shank. Also the method of manufacturing the device.