Controlled, micro-scale film formation of waterborne dispersions

The film formation on a micro-scale of latex material is described. Waterbo rne polymer dispersions dried below their Tg are treated by laser or direct heat treatment by means of a tip (diameter 5 mum) of a micro thermal analy sis apparatus (mu -TA). Both methods give a linewidth, line thickness and d ot-sizes in the micron range. The layer thickness decreases during fusion o f the particles because of the loss of voids during film formation. Non tre ated areas can be washed away selectively. Laser treatment gives a more smo oth surface than direct thermal treatment with a mu -TA tip. Copyright (C) 2001 John Wiley & Sons, Ltd.