PROCESS FOR PREPARING SHRINKABLE ARTICLES, APPARATUS FOR CARRYING OUT THIS PROCESS AND ARTICLES THUS OBTAINED

摘要

Shrink articles, such as shrink tubes, sleeves, caps and the like, are made from extrudable materials, by a procedure in which a parison is first injection-moulded or extruded, is then crosslinked and, in this crosslinked state, is distended, and, by cooling this distended shaped article, the distended state of the latter is fixed. According to the invention, such a procedure is characterised in that the base materials used for the shrink articles are polymers which, after the grafting of crosslinking agents (such as organo-silanes) on to them, are crosslinked under the influence of moisture before or during the shaping of the parison.