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The Release of Disperse Dyes from Thickener Films during Thermal Processes
Author(s) -
Hawkyard C. J.
Publication year - 1981
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1981.tb03582.x
Subject(s) - polymer , homogeneous , chemical engineering , disperse dye , materials science , layer (electronics) , sodium , polymer chemistry , starch , chemistry , organic chemistry , composite material , dyeing , physics , engineering , thermodynamics
The dye release properties of hydrophilic polymer layers containing disperse dye particles have been studied. Polymers which form homogeneous films, such as sodium alginate, act as barriers to the passage of dye vapour, unless the weight of the dye particles initially present in the layer exceeds the weight of polymer. Sodium carboxymethyl starch does not behave in this way, as the polymer film is heterogeneous. Evidence is presented for much improved dye release from coatings containing homogeneous film–forming polymers by the emulsification of hydrocarbons into print pastes. The driedcoatings take on a cellular structure which allows disperse dye vapour to be readily released.