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AssigneeGrazioli S.p.A.
InventorVittorio Grazioli
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The method for making a graphic representation on objects made of a polyolefin polymer, consists of printing a graphic representation on a face of a first film made of a stretched polymer, chosen among a polyester polymer and an acrylic polymer, associating the first film with a second film in order to obtain a membrane formed by the associated first and second films containing the graphic representation between them, transferring the membrane inside an injection mold and injecting a polyolefin polymer in the mold for forming the object, obtaining at least a partial melting of the second film so that the membrane forms one body with said object.
A method of making a graphic representation on an object made of a polyolefin polymer, comprising the steps of:
A membrane for making a graphic representation on objects made of a polyolefin polymer, comprising a first transparent film formed by a polymer chosen selected from the group which consists of a polyester polymer, an acrylic polymer and a polyamide polymer, said graphic representation being printed on one face of said first film, said first film being associated with a second film, by means of a polypropylene adhesive, so that said graphic representation is visible through said transparent first film.
An injection molded object comprising an external layer formed by a polymer selected from the group which consists of a polyester polymer, an acrylic polymer and a polyamide polymer, a first lower layer formed by at least one ink adapted to define a graphic representation, a second lower layer formed by an adhesive polymer, a third lower layer formed by a polyolefin polymer having a lower melting point than that of said external layer, said third layer adhering by melting to the body of said molded object.
A molded object according to clam 22 wherein the melting point of said external layer is comprised between 185.degree. C. and 300.degree. C., and preferably between 205.degree. C. and 280.degree. C. and more preferably between 220.degree. C., and 265.degree. C., said external layer being formed with a polyester polymer.
Dependencies are inferred from the claim text.