method for annealing of elastomers and plastomeren items by concomitant treatment with warmth and vacuum in the absence of oxygen, and the thus obtained gegenstaende.

摘要

1. A secondary heating process for products made from elastomers possessing a network of plastomers resistant to heat, by the action of heat and vacuum, characterized in that the following stages are performed in succession : introduction of the products into an evacuated enclosure insulated against loss of heat, pumping out the air in the enclosure until a pressure between 0.01 and 200 millibars preferably between 0.1 and 1 millibar, is obtained, introduction of an inert gas into the enclosure until a pressure of the order of atmospheric pressure, for example between 0.8 and 1.2 bars is obtained, heating the products, or articles made of the said products, in the enclosure and in the inert atmosphere, to a temperature between 140 and 260 degrees C, pumping out the gas to obtain a pressure between 0.01 and 200 millibars, preferably between 0.1 and 1 millibar, in the enclosure and to maintain it particularly for a period between 10 and 60 minutes, introduction of inert gas into the enclosure to a pressure of the order of atmospheric pressure, for example between 0.8 and 1.2 bars, cooling of the enclosure, removal of the products from the enclosure.