Heat mode recording material and method for producing driographic printing plates
AssigneeAgfa-Gevaert
InventorsEric Verschueren, Joan Vermeersch, Jean Van Trier
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Abstract
The present invention provides a heat mode recording material comprising on a flexible support having an oleophilic surface (i) a recording layer containing a light-to-heat converting substance capable of converting radiation into heat and (ii) an oleophobic surface layer, wherein said oleophobic surface layer and said recording layer may be the same layer, characterized in that the kinetic coefficient of friction (.mu..sub.k) of said material when sliding one side of said material over the other side of said material is not more than 2.6.
Claims8
A heat mode recording material comprising on a flexible support having an oleophilic surface (i) a recording layer containing a light-to-heat converting substance capable of converting radiation into heat and (ii) an oleophobic surface layer, wherein said oleophobic surface layer and said recording layer may be the same layer, wherein said heat mode recording material comprises a back side coating which contains between 175 and 750 mg/m.sup.2 of gelatin, between 50 and 1000 mg/g.sup.2 of colloidal silica with a surface area of at least 100 m.sup.2 /gr and between 1 and 100 mg/m.sup.2 of amorphous silica and wherein the kinetic coefficient of friction (.mu..sub.k) of said material when sliding one side of said material over the other side of said material is not more than 2.6.
A heat mode recording material comprising on a flexible support having an oleophilic surface (i) a recording layer containing a light-to-heat converting substance capable of converting radiation into heat and (ii) an oleophobic surface layer, wherein said oleophilic surface layer and said recording layer may be the same layer, wherein said heat mode recording material comprises a back side coating comprising between 100 and 500 mg/m.sup.2 of a polymethyl-methacrylate latex, between 5 and 50 mg/m.sup.2 of colloidal silica with a surface area of at least 100 m.sup.2 /gr, between 3 and 30 mg/m.sup.2 of a polyethylene wax, between 3.1 and 12 mg/m.sup.2 of polystyrene sulphonic acid, between 0.9 and 4 mg/m.sup.2 of poly(3,4-ethylenedioxythiophene) and between 10 and 100 mg/m.sup.2 of polymethyl-methacrylate matting agent and wherein the kinetic coefficient of friction (.mu..sub.k) of said material when sliding one side of said material over the other side of said material is not more than 2.6.
A heat mode recording material comprising on a flexible support having an oleophilic surface (i) a recording layer containing a light-to-heat converting substance capable of converting radiation into heat and (ii) an oleophobic surface layer, wherein said oleophobic surface layer and said recording layer may be the same layer, wherein said heat mode recording material comprises a back side coating which comprises polyvinyl alcohol, TiO.sub.2 and hydrolyzed tetraalkyl orthosilicate, wherein SiO.sub.2 constitutes between 7 and 30 weight % of the total weight of said matrix, TiO.sub.2 constitutes between 63 and 83 weight % of the total weight of said matrix and polyvinyl alcohol constitutes between 7 and 30 weight % of the total weight of said matrix, the total weight of said matrix lying between 5 and 10 g/m.sup.2 and wherein the kinetic coefficient of friction (.mu..sub.k ) of said material when sliding one side of said material over the other side of said material is not more than 2.6.
Dependencies are inferred from the claim text.