The invention belongs to the technical field of ink-jet printing media, and particularly discloses a lamp box
film coating liquid and a preparation method thereof. The lamp box
film coating liquid comprises an upper layer
coating liquid and a lower layer
coating liquid, and the upper layer
coating liquid is prepared from, by weight, 2-5 parts of
titanium dioxide, 2-5 parts of
acrylic acid copolymer emulsion, 1-3 parts of a surfactant and 3-7 parts of ethyl
alcohol; the lamp box
film coating liquid prepared by the method is divided into an upper layer and a lower layer, the upper layer is an ink absorbing layer, the lower layer is an
adhesive covering layer,
nitric acid solutions are respectively added into the prepared
silicon dioxide pre-dispersion liquid and the
titanium dioxide pre-dispersion liquid for continuous dispersion; by preparing coating liquid after adopting of the
nitric acid solutions, the light resistance and the
weather resistance of the coating can be improved, meanwhile, the covering power and the light
transmittance of the coating are also remarkably improved, the double-layer film coating liquid is prepared from different materials, the adaptability is high, double-layer structures prepared from different materials are combined with an acidic formula improved by adopting the
nitric acid solutions, and the overall performance of the coating liquid can be remarkably improved.