56results about How to "Increased printing life" patented technology

A lithographic printing plate precursor is disclosed, comprising a metal support having formed thereon an anodic oxide film, and an image-forming layer containing a light-to-heat converting agent, or a light-sensitive layer capable of image-forming with infrared laser exposure provided in this order from the support.

The present invention provides an imageable element including a lithographic substrate and an imageable layer disposed on the substrate. The imageable layer includes a radically polymerizable component, an initiator system, and a polymeric binder. The imageable element further includes a tetraarylborate salt. The presence of the tetraarylborate salt may provide improved imaging speed and may enhance press life due to better adhesion between the imageable layer and the substrate. The tetraarylborate salt may be present in the imageable layer, an interlayer, or a separate layer between the substrate and the imageable layer. The imageable element may be imaged and mounted on-press without a separate development step.

A high-quality hot rolled steel sheet is manufactured with a high production efficiency and a low cost, from a long, hot slab, using a combination of continuous casting facilities and a plate reduction press machine.

The present invention provides a capture member for directly capturing ink droplets ejected to an area other then a recording medium, among ink droplets ejected from a printer head for ink jet recording, wherein said member comprises a porous plastic produced by sinter molding of plastic particles, and contains an impregnating agent impregnated therein.

Disclosed is a lithographic printing plate support obtainable by subjecting an aluminum plate to an electrochemical graining treatment with an aqueous solution containing hydrochloric acid, anodizing treatment and alkali metal silicate treatment at least, wherein: a surface of the support has a grained shape in which large pits with a mean aperture diameter of 2 to 10 μm and small pits with a mean aperture diameter of 0.05 to 0.8 μm overlap with each other, with the mean ratio of depth to aperture diameter of the small pits being 0.2 to 0.6; a surface area difference ΔS⁵⁰ defined by equation (1):

ΔS⁵⁰=(S_x⁵⁰−S₀⁵⁰)/S₀⁵⁰×100 (%)   (1)

in which S_x⁵⁰ is the actual area of a 50 μm square region of the surface as determined by three-point approximation from three-dimensional data obtained by measuring the region with an atomic force microscope at 512×512 points and S₀⁵⁰ is the geometrically measured area of the same region, is 20 to 40%; the alkali metal silicate treatment is performed using an aqueous solution of pH 11.5 to 13.0 which contains an alkali metal silicate; and an amount of Si atoms deposited to the surface is 3.0 to 15.0 mg/m². The presensitized plate according to the present invention allows not only the press life but also the resistance to scumming by ink spreading, resistance to scumming by leaving and resistance to scumming by failed deletion, and the water visibility as well, to be excellent, even if an FM screen is used for halftone.

The invention discloses scaling powder used for high-precision nanometer soldering paste. The raw materials of the scaling powder comprise, by mass, 20%-30% of solvent, 30%-50% of rosin, 3%-8% of surfactant, 2%-5% of thixotropic agents, 5%-10% of organic acid, 2%-5% of organic amine and 2%-5% of inhibiter. Compared with the prior art, the scaling powder used for the high-precision nanometer soldering tin paste has the advantages that 1, each grain of tin powder is wrapped in the scaling powder and makes entire contact with the scaling powder, the tin powder cannot adhere to a net or a scraper in the printing process, and the defects of skipping printing and lessening soldering paste are decreased; 2, the friction among the tin powder is reduced through nanometer particles on the surface of the tin powder, and the printing service life of the soldering paste is prolonged; 3, the thixotropic agents forme a fine anti-setting net-shaped structure, and big crystals cannot be separated out to cause the phenomenon of false thickening; and 4, each grain of the tin powder in the soldering paste keeps in good contact with the scaling powder by adding polyamide resin nanometer powder, and the soldering efficiency of the scaling powder is improved.

The invention discloses a manufacturing method of a composite screen printing plate. The manufacturing method comprises the following steps of 1) screen pulling and compounding; 2) film layer manufacturing; 3) coating an adhesive layer; 4) coating a film; 5) drying; 6) laser; 7) cleaning; and 8) detection and packaging. By means of the mode, the manufacturing method of the composite screen plate has the advantages that when the screen printing plate is used, the film layer is not easy to wear and break, the printing life is prolonged by one time or more, the printing life of a conventional plate-making screen printing plate is averagely increased by about 50 thousand, the average energy of the screen printing life prepared by the method can reach 100 thousand or above and even higher, theprinting line at the later stage is not expanded, and the efficiency of the battery piece is obvious; and the manufactured screen printing plate is better in ink permeability, so that the limitation of the high-precision narrow line width can be greatly reduced, on the basis of the same type of ink printing, the width of the designed line can be compressed by 2-5 microns, the printing is good, theline type is good, and therefore the efficiency of the battery piece is obviously improved.

A method for making a lithographic printing plate is disclosed which comprises the steps of: (i) providing a negative-working, heat-sensitive lithographic printing plate precursor comprising a support having a hydrophilic surface or which is provided with a hydrophilic layer and a coating provided thereon, the coating comprising an image-recording layer which comprises hydrophobic thermoplastic polymer particles and a hydrophilic binder, wherein the hydrophobic thermoplastic polymer particles have an average particle size in the range from 45 nm to 63 nm, and wherein the amount of the hydrophobic thermoplastic polymer particles in the image-recording layer is at least 70% by weight relative to the image-recording layer; (ii) exposing the coating to heat or infrared light, thereby inducing coalescence of the thermoplastic polymer particles at exposed areas of the coating; (iii) developing the precursor by applying an aqueous alkaline solution, thereby removing non-exposed areas of the coating from the support, wherein the aqueous alkaline solution has a pH≧10 and comprises a surfactant.

The invention discloses a manufacture method of a multi-angle or zero-angle screen printing plate. The manufacture method comprises the following specific steps of 1) drawing a net and compounding thenet; 2) carrying out a screen printing plate washing treatment; 3) performing graph scanning; 4) preparing a film layer; 5) coating an adhesive layer; 6) coating a film; 7)drying; 8) carrying out laser etching; 9) cleaning; and 10) detecting and packaging. By means of the mode, the manufacture method of the multi-angle or zero-angle screen printing plate has the advantages that the contour of theline formed by laser is clear and flat, the line width is uniform, the shape of the painted line is better, and has obvious advantages compared with conventional plate making; the polymer composite layer is not easy to fall off, so that the plate making yield is greatly improved; when the screen printing plate is used, the film layer is not easy to wear and break, the printing life is prolonged by more than one time, the printing lines in the later period cannot be expanded, and the efficiency of the battery piece is obvious; and the manufactured screen printing plate line is better in ink permeability, so that the limitation of the high-precision narrow line width can be greatly reduced, the printing is good, the line type is good, and the efficiency of the battery piece is improved moreobviously.

A lithographic printing plate precursor comprising: a support; and an image recording layer comprising a polymerization initiator, a polymerizable compound and a polymer binder and being removable with at least one of a printing ink and a fountain solution, wherein the polymerizable compound and the polymer binder are defined so that a film made by the polymerizable compound and the polymer binder has an elastic modulus of 30 g/mm³ or less.

The invention discloses a method capable of obtaining an ultraviolet light protection layer on a surface of a development roller. The method comprises the following steps of: irradiating an ultraviolet light having certain wavelength to the surface of the development roller having a high-molecular rubber layer; during the decomposition of an organic matter on the surface of the rubber layer, absorbing the ultraviolet light to cut off a chemical structure of a surface layer of the rubber layer; and cross-linking and vulcanizing high-molecular rubber again to obtain the ultraviolet light protection layer which is 0.1 to 0.3 mm thick on the surface of the rubber layer. The invention also provides a device for implementing the method. The invention has the advantages that: a coating material is not required; material cost is effectively saved; energy consumption is reduced; process time is short; process efficiency is improved by over 200 times; due to no atomization, environmental pollution is reduced; and when the development roller is used for printing, risks of drop-off and abrasion of a coating are avoided, printing quality is effectively improved, and printing service life is prolonged.

Data is printed predetermined number of times on a print area having a width W₂ smaller than the maximum print width W₁ of a print head (26) by using predetermined ink nozzles (26d) while moving a print medium F relative to the print head (26) in a state that the position of the print head (26) in a direction perpendicular to a feeding direction X of the print medium F is fixed. After that, the print head (26) is moved in the direction perpendicular to the feeding direction X of the print medium F each time printing has been performed the predetermined number of times while the print medium F is moved at a predetermined pitch at a time, and printing is again performed on the print area by using ink nozzles (26d) which are different at least partly from the ink nozzles (26d) which were used before the move, in the state that the print head (26) is fixed.

The invention relates to a UV-CTP plate imaging coating layer resistant to UV ink. The UV-CTP plate imaging coating layer is characterized by comprising consituents based on percent by mass: 10-60% of solvent resistant resin, 2-12% of solubilizer, 3-25% of dissolution promotion resin, 10-65% of film forming resin, 0-1% of dissolution resistant resin, 6-30% of ester matter of alkylphenol-formaldehyde resin and 2-heavy nitrogen-1-naphthoquinone-4-sulfonyl chloride, 0-30% of ester matter of pyrogallol-acetone resin and 2-heavy nitrogen-1-naphthoquinone-5-sulfonyl chloride, 0-20% of alcohol-resistant dissolution inhibitor and 0.85-2% of dye. With the adoption of the abovementioned technical scheme, the UV-CTP plate imaging coating layer resistant to the UV ink is provided by the invention, is high in UV ink resistance, cannot be dissolved, and has a long printing lifetime.

The invention discloses a hyperfine double three-dimensional high molecular material integrated screen printing plate which comprises a screen frame, a polyester screen, a steel wire gauze, high molecular film layers, high molecular pattern regions, photosensitive glue pattern regions and photosensitive glue lines. The high molecular pattern regions are separately arranged on the high molecular film layers and stretch to the bottom of the steel wire gauze, the photosensitive glue pattern regions fill the high molecular pattern regions, the photosensitive glue lines are arranged in the middle parts of the photosensitive glue pattern regions, and the high molecular pattern regions and the photosensitive glue lines are of hollowed structures. In this way, the high molecular materials in middle non-printed regions of the lines are super high in abrasive resistance and high in printing resistance, the service life of screen printing can be prolonged greatly, the deformation quantities of the silk screen and the patterns are reduced greatly, the printing quality can be improved greatly, high strength of high molecules is combined and high resolution of the photosensitive glue is also available, and meanwhile, new patterns can be re-manufactured after the screen printing plate is recovered and back-washed, so that the cost is saved greatly.

A support for a lithographic printing plate is composed of a metal base that has been grained and anodized then subjected to treatment with an aqueous solution containing an inorganic fluorine compound and a phosphate compound, followed or preceded by treatment with a silicate compound-containing aqueous solution, and an intermediate layer which lies on the treated metal base and contains an acid group-bearing polymeric compound. Presensitized plates composed in part of the support, when used as on-machine development type plates, have a good on-machine developability, high sensitivity, long press life and good resistance to scumming. When used as positive or negative-working thermal plates, such presensitized plates efficiently utilize heat in image formation, have a high sensitivity and a long press life, and minimize scumming in non-image areas.

A photopolymerizable composition comprising a polymer having a radical polymerizable group and a unit represented by the following formula (I):

wherein Q¹ represents a cyano group or COX²; X¹ and X² each independently represent —R— or a halogen atom, R represents a hetero atom; R^a and R^b each independently represent a hydrogen atom, a halogen atom, a cyano group or an organic residual group; X¹ and X² may be taken together to form a cyclic structure; R^a and R^b may be taken together to form a cyclic structure; and X¹ and R^a or R^b may be taken together to form a cyclic structure.