B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 49/24 (2006.01)
Patent
CA 2341691
The invention relates to the use of an opaque multilayered polypropylene film as in-mold label in blow--molding. The label is built up from a base layer and at least two top layers, where the base layer comprises vacuole-initiating fillers and pigments. The film has an overall thickness of at least 85 µm, and the base layer contains a combination of tertiary aliphatic amine and fatty acid amide, and both top layers contain an antiblocking agent. The density of the film is in the range from 0.65 to 0.85 g/cm3, and the film has been corona- or flame-treated on both surfaces.
L'invention concerne l'utilisation d'un film polypropylène opaque multicouche comme étiquette surmoulée dans un procédé de moulage par soufflage. L'étiquette comporte une couche de base et au moins deux couches extérieures. La couche de base contient des charges amorçant les vacuoles, ainsi que des pigments. Le film présente une épaisseur totale d'au moins 85 mu m et la couche de base contient une combinaison d'amine aliphatique tertiaire et d'amide d'acide gras, et les deux couches extérieures contiennent des agents antiadhérents. La masse volumique du film est de l'ordre de 0,65 à 0,85 g/cm<3> et le film est traité sur ses deux faces par décharge corona ou à la flamme.
Biddiscombe Helen
Schaan Josef
Wieners Gerhard
Fetherstonhaugh & Co.
Hoechst Trespaphan Gmbh
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