C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 13/02 (2006.01) C08K 3/00 (2006.01) C08K 5/132 (2006.01) C08K 5/3475 (2006.01) C08K 13/04 (2006.01) C08L 23/08 (2006.01)
Patent
CA 2348458
The present invention is directed to a thin packaging film made out of a thermoplastic material with anti-UV properties, characterized in that its composition further comprises a combination of at least one organic compound with at least one inorganic UV-absorbent compound, for improved barrier against UV rays, and improved transparency. Preferably, the organic compound is a benzotriazole, and the inorganic compound is micronized zinc oxide. More preferably, the material for the film further comprises a binder compound, for example a benzophenone, in order to improve the compatibility between the organic component and the base-resin. Preferably, the film thickness is below 80µm, more preferably below 35µm.
L'invention concerne un film d'emballage mince constitué d'une matière thermoplastique dotée de propriétés anti-UV et caractérisé en ce qu'il se compose également d'une combinaison d'au moins un composé organique et d'au moins un composé inorganique à absorbance UV, ce qui permet d'obtenir une meilleure protection contre les rayonnements UV ainsi qu'une meilleure transparence. De préférence, le composé organique est un benzotriazole tandis que le composé inorganique est un oxyde de zinc microfin. Idéalement, la matière du film comprend également un composé de liaison, par exemple, un benzophénone, ce qui permet d'améliorer la compatibilité entre le composé organique et la résine de base. De préférence, l'épaisseur du film est inférieure à 80 mu m, idéalement 35 mu m.
Hirn Thomas Wolfgang Friedrich
Menif Rached
Dimock Stratton Llp
The Procter & Gamble Company
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