Agfa Graphics Nv

Agfa Gevaert Nv

Agfa-gevaert

Geert Van Dyck

Etienne A Van Thillo

David Tilemans

Peter Bracke

Stefaan K De Meutter

Johan August Loccufier

Hieronymus Andriessen

Frank Louwet

August M Marien

Bert Groenendaal

Joris Van Garsse

A method for inkjet varnishing a substrate includes the steps of jetting a micro-pattern of a varnish having a viscosity of less than 30 mPa&#xb7;s at 45&#xb0; C. and at a shear rate of 30 sto a portion of the substrate by one or more printheads having nozzles with a nozzle diameter of no more than 30 &#x3bc;m, and at least partially curing the micro-pattern within 500 milliseconds after jetting to provide a micro-roughness to the portion of the substrate.

Methods for inkjet varnishing

A combination of: a) an inkjet print head having a nozzle density of at least 600 dpi and nozzles with an outer nozzle diameter D smaller than 25&#x3bc;m; and b) a UV curable inkjet composition containing 0 to 10 wt % of one or more monofunctional monomers and at least A wt % of 2-(2-vinyloxyethoxy)ethyl acrylate, wherein both wt % are based on the total weight of the UV curable inkjet composition; and wherein A is defined by the formula 100 wt %&#x2212;D&#xd7;3.0 wt %/&#x3bc;m&#x2266;A&#x2266;100 wt %&#x2212;D&#xd7;1.0 wt %/&#x3bc;m.

UV curable inkjet compositions for high-density print heads

A radiation curable inkjet printing method for producing printed flexible foils and plastic bags wherein a web-like polymeric substrate having a maximum value for Tan &#x3b4; between 40&#xb0; C. and 110&#xb0; C. and a surface energy Sis printed upon using a single pass inkjet printer with a non-aqueous radiation curable inkjet liquid having a surface tension S, wherein Sis smaller than Sby at least 4 mN/m, and curing the radiation curable liquid on the substrate at a surface temperature equal or higher than the temperature of the maximum value for Tan &#x3b4; and smaller than the melting point of the polymeric recording medium. A single pass inkjet printer is also disclosed.

Single pass radiation curable inkjet printing methods for producing printed flexible foils and plastic bags

A single pass inkjet printing method includes the steps of: a) providing a radiation curable inkjet ink set containing at least a first and a second radiation curable inkjet ink having a dynamic surface tension of no more than 30 mN/m measured by maximum bubble pressure tensiometry at a surface age of 50 ms and at 25&#xb0; C.; b) jetting a first radiation curable inkjet ink on an ink-jet ink-receiver moving at a printing speed of at least 35 m/min.; c) at least partially curing the first inkjet ink on the ink receiver within the range of 40 to 500 ms after the first inkjet ink landed on the ink receiver; d) jetting a second radiation curable inkjet ink on the at least partially cured first inkjet ink; and e) at least partially curing the second inkjet ink within the range of 40 to 500 ms after the second inkjet ink landed on the first inkjet ink.

Single pass inkjet printing method

A layer configuration on a support, the layer configuration comprising a layer containing a polymer containing optionally substituted 3,4-alkylenedioxythiophene structural units, in which the two alkoxy groups may be the same or different or together represent an optionally substituted oxy-alkylene-oxy bridge, and a compound selected from the group consisting of polyphosphoric acids, polyphosphoric acid salts, thia-alkanedicarboxylic acids, cyclohexadiene compounds and polyhydroxy-compounds selected from the group consisting of tetronic acid derivatives; ortho-dihydroxybenzene compounds with at least one sulpho group, compounds according to formula (I):HO&#x2014;CH&#x2014;CH(OH)&#x2014;(CH)&#x2014;S&#x2014;CH&#x2014;C(R)(R)&#x2014;CH&#x2014;S&#x2014;(CH)&#x2014;CH(OH)&#x2014;CH&#x2014;OH&#x2003;&#x2003;(I)wherein Rand Rare independently H, &#x2014;OH or alkyl, and n and m are independently 1, 2 or 3; compounds according to formula (II):HO&#x2014;(CH)&#x2014;S&#x2014;CH&#x2014;S&#x2014;(CH)&#x2014;OH&#x2003;&#x2003;(II)wherein p and q are independently 2, 3 or 4; compounds hydrolyzable to tetronic acid derivatives; compounds hydrolyzable to compounds according to formula (I); and sulpho-substituted 2-thia-alkyl-benzimidazole compounds.

Layer configuration with improved stability to sunlight exposure

A receptor element for non-impact printing is provided comprising a support and an image receiving layer containing at least 80% by weight with respect to the total weight of the layer of a polymer with between 0.5 and 20 mole % of moieties carrying sulphonic acid groups. Preferably the polymer is a polyester comprising between 0.5 and 20 mole % with respect to the total acid content of moieties provided by sulphoisophthalic acid and the sulpho groups are present in free acid form.

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Ham, Belgium

Geert Van Dyck