Continuous process for the dyeing of polymers

Details Continuous process for the dyeing of polymers Continuous process for the dyeing of polymers

1987-09-25

1989-02-07

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Drawing or stretching of preform with dyeing, process or...

8513, 8516, 8512, 264 78, D06P 700, D06P 379

Patent

active

048028860

ABSTRACT:
A continuous process for the dyeing of melt-extrudable polymers that are capable of being dyed, is disclosed. The process comprises extruding molten polymer through an orifice, contacting the extruded polymer while still in a molten state with an aqueous solution of a dye for said polymer, and withdrawing the resultant dyed polymer from the aqueous solution. The process may be used for the dyeing of e.g. modified polyolefins, polyamides, ionomers and the like. In preferred embodiments the process may be used in the extrusion coating of wire or other continuous filamentary material to provide color-coded products.

REFERENCES:
patent: 3264272 (1966-08-01), Rees
patent: 3864315 (1975-02-01), Ohno et al.
patent: 4369039 (1983-01-01), Coates
patent: 4612155 (1986-09-01), Wong et al.

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