| 摘要 |
A PROCESS FOR MANUFACTURING A BI-AXIALLY ORIENTED, HEAT-SHRINKABLE, POLYOLEFIN, MULTI-LAYER FILM COMPRISING A FIRST LAYER (A) COMPRISING AN ETHYLENE-(ALPHA)-OLEFIN COPOLYMER AND A SECOND LAYER (B), WHICH IS AN OUTER LAYER, COMPRISING AN ETHYLENE OR PROPYLENE HOMO- OR CO-POLYMER, WHICH PROCESS COMPRISES MELT EXTRUSION OF THE FILM POLYMERS THROUGH A FLAT DIE AND ORIENTATION OF THE OBTAINED CAST SHEET SIMULTANEOUSLY IN THE LONGITUDINAL AND THE TRANSVERSAL DIRECTIONS BY A SIMULTANEOUSLY TENTER.
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