Bleaching and dyeing; fluid treatment and chemical modification – Nontextile – dyeing process or product – including inorganic... – Polymer from polyol and a polycarboxylic acid or derivative...
Patent
1991-09-30
1992-11-10
Clingman, A. Lionel
Bleaching and dyeing; fluid treatment and chemical modification
Nontextile, dyeing process or product, including inorganic...
Polymer from polyol and a polycarboxylic acid or derivative...
8495, 8506, 8582, 8922, 8933, 8938, D06P 352, C09B 6700
Patent
active
051620464
ABSTRACT:
A method of dyeing film of polyethylene terephthalate wherein the film is immersed in a dye bath of solvent dyes dissolved in a carrier consisting of glycerol triacetate, the dye bath being heated so the film is raised to the glass transition temperature of the film, and the dye and carrier are absorbed into the film. The dye and carrier are removed from the surface of the film by a washing bath, and the film is then heated to remove the carrier absorbed in the film without depreciating the dyestuff or the film.
REFERENCES:
patent: 4215992 (1980-08-01), Sato et al.
patent: 4581035 (1986-04-01), Wilson
patent: 4602916 (1986-07-01), Wilson
patent: 4609375 (1986-09-01), Wilson et al.
patent: 4812142 (1989-03-01), Brodmann
Clingman A. Lionel
Middleton James B.
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