Continuous gradient dyeing of plastic ribbon

Details Continuous gradient dyeing of plastic ribbon Continuous gradient dyeing of plastic ribbon

1984-01-09

1985-06-04

Coe, Philip R.

Bleaching and dyeing; fluid treatment and chemical modification

Nontextile, dyeing process or product, including inorganic...

8519, 8154, 118405, 118419, 427164, B05C 302

Patent

active

045212147

ABSTRACT:
There is described a process for producing, in a continuous manner, a gradient dyeing across the width of a long strip of a plastic sheet and an apparatus used therefor. In a preferred embodiment of the invention, the orientation of the plastic strip is maintained substantially constant during the passage through a dye bath, and the dye liquid level is repetitively varied by use of a liquid level control means. This invention is particularly useful for making gradient-dyed plastic sheets which in turn are used for making sunglass lenses.

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