专利名称：Disconnectable film, layered product and
process for its preparation
发明人：FERRARIS, GIUSEPPE,LUDWIG,
PETER,MUNNINGER, WILHELM, DR.,RINK,TOMAS FEDERICO,TSCHENET, WERNER
申请号：EP01102010.4申请日：20010130公开号：EP1167436A1公开日：20020102
专利附图：
摘要：The material includes a mixture of silicone-modified polyethylene and adherent
polyolefin. An Independent claim is included for the method of manufacture. Bands ofsubstrate- (16) and covering- (20) materials are each unwound from a roll (14, 18). Theyare led together onto a cooling cylinder (10) with pressure roller (12). Lining material isextruded between the bands. Having wrapped part of the cylinder circumference duringits rotation, the laminate (28) is led off to be wound on a roll (34). Preferred features:LDPE, low density polyethylene, is used. The polyethylene is graft copolymerized withthe silicon. It is mono-extruded. It is co-extruded with polyolefin, preferably LDPE. Alaminar material based on the foregoing is claimed. Polyethylene is mixed with thesilicone. The silicon proportion in the polyethylene is 0.1-3 wt%. The covering layercomprises non-polar plastic sheet, especially polyolefin. The silicone proportion of thepolyethylene tends to 0.1 wt%. The silicon proportion of the polyethylene approaches 3wt%. The layer of lining material is mono-extruded. The mono-extrudate lining medium, is10-40 mu m thick. The layer of lining material is coextruded with polyolefin, preferablyLD polyethylene. In the coextrudate the polyolefin is 1-30 mu m thick and the extrusionlining material is 1-10 mu m thick. The extrusion lining material faces the covering layer.The substrate layer is coated externally with a layer of self adhesive and covered withsiliconized separation material. In the method, wide-slot mono-extrusion of the liningmedium is carried out. The lining material is wide-slot coextruded, together withpolyolefin, preferably a LD polyethylene.
申请人：FRANTSCHACH INNCOAT GMBH,RITRAMA SPA
地址：Angererstrasse 25 83064 Raubling DE,Via della Guerrina 108 20052 Monza(Milano) IT
国籍：DE,IT
代理机构：Meyer-Roedern, Giso, Dr.
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