| 摘要 |
Method for hot forming polypropylene foil 1 which is intermittently being forwarded through a continuous heating zone A where it is heated to near but below its melting temperature, following which it is forwarded to a forming zone B where a pre-forming operation of the foil is performed, following which a final forming operation takes place by blowing a jet of a compressed pressure medium against one side of the foil 1. <IMAGE> |
