Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1996-08-22
1998-09-22
Robinson, Ellis P.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
264 75, 264 78, 2641761, 26417311, 26417312, 26417316, 26417621, 425114, 425130, 4251311, 425462, 15624411, 15624427, 156269, 428 357, 428212, 428192, 428195, 428207, 4283197, 428339, B32B 900
Patent
active
058110461
ABSTRACT:
Process and device for producing two-colored or multicolored switchboard films, dashboard films or dashboards for motor vehicles produced therefrom using at least one backing film or backing layer, at least one upper film or upper layer which is arranged thereon and contains dyes and/or color pigments. The polymer melts for these films or layers come from two or more extruders and are supplied first to an adapter or a black box having at least one opening or a gap for the backing film or layer and at least one further opening for the upper film or upper layer. According to the invention, an adapter or a black box is used in which a wedge-shaped projection or a projection of triangular cross section is arranged. At least two different-colored polymer compositions in melt form, having identical viscosity or virtually identical viscosity (difference in MFI at 230.degree. C./2.16 kg of 0 to 0.5 g/10 min), are employed for the upper film or upper layer, and are first of all separated or partially separated by the wedge-shaped projection or projection of triangular cross section in the adapter or in the black box but then, after having passed through the adapter or the black box, are guided alongside one another, the different-colored melts of the upper films combining with the melt layer of the lower film or lower layer prior to exiting the extruder die.
REFERENCES:
patent: 5262108 (1993-11-01), Minke et al.
Dous Eberhardt
Schattauer Uwe
Alkor GmbH Kunststoffe
Bahta Abraham
Robinson Ellis P.
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