Process and apparatus for producing two-colored or multicolored

Details Process and apparatus for producing two-colored or multicolored Process and apparatus for producing two-colored or multicolored

1997-03-25

1999-01-12

Robinson, Ellis P.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

425114, 425130, 425257, 425462, 425465, 428207, 428212, 264 75, 2641761, 26417311, 26417312, 26417316, 26417621, 15624411, 15624427, 156269, B32B 900

Patent

active

058584048

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: 4780345 (1988-10-01), Gray
patent: 4828780 (1989-05-01), Luker
patent: 5262108 (1993-11-01), Minke et al.

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