LAMINATED FILM FOR THERMOCOMPRESSION BONDING LAMINATION

PURPOSE:To improve the adhesive strength and bright feel of the laminated film by laminating a thermally welded polymer layer having the m. p. of a specific temp. on one surface of a base material layer and a polyolefin layer having the m. p. of another specific temp. on the opposite surface and spe...

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Bibliographische Detailangaben
Hauptverfasser: SATO JUNYA, MURAKAMI SEIJI, SASAKI KIKUJI
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:PURPOSE:To improve the adhesive strength and bright feel of the laminated film by laminating a thermally welded polymer layer having the m. p. of a specific temp. on one surface of a base material layer and a polyolefin layer having the m. p. of another specific temp. on the opposite surface and specifying the surface roughness of the polyolefin layer. CONSTITUTION:The thermally welded polymer layer having 50 to 105 deg.C m. p. is laminated on one surface of the base material layer consisting of a biaxially stretched polypropylene (PP) film and the polyolefin layer having 108 to 155 deg.C m. p. on the opposite surface. In addition, the surface roughness of the polyolefin layer is specified to 0.005 to 0.19mum. The base material layer consisting of the biaxially stretched PP is the film essentially composed of PP and the thermally welded polymer is not particularly limited and is preferably an ethylene copolymer. For example, low-density polyethylene, straight chain polyethylene, ethylene/propylene random copolymer, etc., are used for the polyolefin to constitute the polyolefin layer. Thus, the adhesive strength and bright feel are improved.