Study On The Preparation Of Coated Trademark Fabric And Its Fast Inkjet Printing Performance

Due to the traditional solvent dry coating and PA6 wet coating finishing of trademark fabrics,digital ink-jet printing is prone to slow ink absorption,unclear printing patterns,low color fastness to friction,which is difficult to promote the application.Waterborne acrylic inks for digital printing mainly use water-soluble acrylic resin as the binder.Based on similar compatibility principles,waterborne polyacrylate is used as the coating agent for trademark fabrics,which is expected to improve its absorption of Waterborne inks.In this paper,the influence of four kinds of waterborne polyacrylates with different modified structures on the surface structure and spray printing performance of the trademark fabric is studied firstly,the suitable coating agent is selected,and the dosage ratio of the coating agent and the filler is optimized;secondly,the influence of kaolin,calcium carbonate and silicon dioxide on the surface morphology and spray printing performance of the trademark fabric is studied,and kaolin and calcium carbonate are selected to be added into the coating slurry.Finally,the influence of the amount of crosslinking agent and baking process conditions on the coating performance was studied,and the coating formula and process suitable for digital inkjet printing trademark fabric were developed.By studying the rheological properties of the coating slurry with different modified structures on the coating slurry,the surface structure,mechanical properties,feel,fast-drying properties of ink absorption,print clarity,and fastness to rubbing of coated trademark fabrics.It was found that the particle size distribution of EC-507 modified styrene-acrylic emulsion was uniform,and the prepared coating slurry had the best rheological properties;After coating,the contact angle of the trademark fabric is 33.76°,the ink absorption and quick drying performance is good;the roundness of the ink dot is 0.68,the printing clarity is high;the color fastness to dry friction reaches 4 levels.On the basis of this,EC-507 modified styrene acrylic emulsion was used as coating agent,and the effect of the ratio of coating agent and filler on the printing performance of the trademark fabric was investigated.The results showed that the spraying performance of the coated trademark fabric was the best when the ratio of coating agent and filler was 1:3.The influence of kaolin,calcium carbonate,silica and other fillers on the spray printing performance of the trademark fabric was studied systematically.It was found that the printing clarity of the trademark fabric after kaolin coating was the highest,but the color fastness to friction was lower;the color fastness to friction of the trademark fabric after calcium carbonate coating was the best,reaching grade 4 or above;After coating with silica,the trademark fabric will appear infiltration phenomenon and the color fastness to rubbing is low.Therefore,kaolin and calcium carbonate are selected to be compounded,and the compounding proportion is optimized.The results show that when the ratio of kaolin and calcium carbonate is 7:5,the color fastness to rubbing of the coated trademark fabric reaches 4 or more grades,and the spray printing performance of the trademark fabric meets the requirements.Finally,the amount of crosslinking agent and the baking process after coating were further optimized,and the formulation and baking process of the coated fabric suitable for digital inkjet printing were determined.Among them,water 100 g,EC-507 modified styrene acrylic emulsion 25 g,compound filler 75 g(kaolin and calcium carbonate according to mass ratio 7:5),dispersant 1.5 g,crosslinking agent 0.375 g(cross linker dosage control).1.5%of the total coating agent;baking temperature 150?,baking time 90 s.