Moisture-resistant, coated thermoplastic film having enhanced ad

Details Moisture-resistant, coated thermoplastic film having enhanced ad Moisture-resistant, coated thermoplastic film having enhanced ad

1989-11-01

1990-05-08

Lusignan, Michael

Coating processes

With stretching or tensioning

427322, 427341, 4273935, B05C 3107, B05D 312

Patent

active

049237136

ABSTRACT:
A two-step, sequential coating method is disclosed which permits the use of aqueous precursor solutions to coat water-insoluble compounds onto thermoplastic film. In a preferred embodiment, an aqueous oleic acid/ammonium oleate solution is coated onto amorphous polyester sheet which is subsequently monoaxially oriented by stretching in the machine direction, and coated with an aqueous solution of calcium hydroxide, thereby forming a layer of calcium oleate in situ. The coated film is subsequently biaxially oriented by stretching in the transverse direction, and heat-set.

REFERENCES:
patent: 4486483 (1984-12-01), Caines
patent: 4554200 (1985-11-01), Caines
patent: 4775593 (1988-10-01), Heberger et al.

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