D - Textiles – Paper – 06 – P
Patent
D - Textiles, Paper
06
P
D06P 1/90 (2006.01) D06P 1/651 (2006.01)
Patent
CA 2524725
A process for tinting a molded article is disclosed. The process entails applying by spraying or by flow coating a hot, dye-solution onto at least a portion of the surface of a molded article to obtain a tinted article and washing the tinted article. In addition to the dissolved dye, the dye solution that is substantially free of particulate matter contains an aqueous solution of an organic solvent and a surfactant. The article is one molded of a thermoplastic molding composition. In an embodiment of the invention, the dye solution is prepared by filtering a hot aqueous solution through a bag filter that contains a dye to obtain a hot, dye-solution. In a further embodiment, activated carbon is used to purify the dye solution to obtain a dye-free aqueous solution.
L'invention concerne un procédé pour teindre un article moulé. Ledit procédé comprend l'application par pulvérisation ou l'application par aspersion d'une solution chaude, colorante sur au moins une partie de la surface de l'article moulé, ce qui permet d'obtenir un article teint et de laver ledit article teint. En plus du colorant dissout, la solution colorante, sensiblement exempte de matières particulaires, contient une solution aqueuse d'un solvant organique et d'un surfactant. L'article est moulé dans une composition de moulage thermoplastique. Dans un mode de réalisation, la solution colorante est préparée par filtrage d'une solution aqueuse chaude à travers un filtre sous forme de sac, lequel contient un colorant permettant d'obtenir une solution colorante chaude. Dans un autre mode de réalisation de l'invention, du charbon actif est utilisé pour purifier la solution colorante, ce qui permet d'obtenir une solution aqueuse exempte de colorant.
Archey Rick L.
Derikart David M.
Nikolakopoulos Michael
Pyles Robert A.
Bayer Materialscience Llc
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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