59results about How to "Excellent printing resistance" patented technology

According to the present invention there is provided an imaging element comprising on a support having a hydrophilic surface in the order given a photosensitive layer insoluble in an aqueous alkaline solution and capable of becoming soluble in said aqueous alkaline solution upon exposure with actinic light and a thermosensitive layer comprising a masking dye rendering said thermosensitive layer opaque to light for which said photosensitive layer has spectral sensitivity and said imaging element further comprising a compound A capable of converting light into heat comprised in said thermosensitive layer or a layer adjacent thereto, characterized in that said thermosensitive layer further comprises thermoplastic particles of a hydrophobic polymer.

In order to provide a computer-to-plate (CTP) plate in which an image can be inscribed by a laser beam having Ithe maximum strength in a near infrared or infrared region, and heat processing is not necessary prior to developing a latent image, and which allows the use of a conventional printing apparatus as it is upon printing, (I) a lithographic printing plate is provided which has on a substrate, a photosensitive layer comprising a photosensitive composition containing a crosslinking agent, an aqueous dispersion of resin fine particles made of a resin which is self water-dispersible having a carboxylic group and a functional group capable of performing cross-linking reactions with the crosslinking agent, and an infrared absorption agent; and (II) an image forming method is provided which is characterized in that after an image has been formed on a photosensitive layer of the lithographic printing plate set forth in the above (I) by using a laser beam, the image is subjected to wet development.

The invention discloses a manufacturing method of a metal alloy composite screen plate. The manufacturing method comprises the following specific steps of 1) carrying out net pulling compounding; 2) manufacturing an alloy sheet pattern outer contour; 3) preparing a film layer; 4) coating an adhesive layer; 5) coating a film; 6) drying; 7) laser; 8) cleaning; and 9) detecting and packaging. In thisway, according to the manufacturing method of the metal alloy composite screen plate, a metal alloy sheet is adopted to replace traditional mesh cloth, and the manufacturing method has low elongationrate, better dimensional stability, printing resistance, puncture resistance, double supports of the metal alloy sheet and the film layer are adopted, the service life of the bonding strength far beyond a silk-screen and the film layer can be improved by 30% or above, and under the action of a high-molecular adhesive, the adhesion force of the high-molecular composite layer is extremely high, theplate making yield is greatly improved, the production cost is saved, the printing is good, the line type is good, and the efficiency of a battery piece is obviously improved.

To provide an original plate for a planographic printing plate, which is excellent in any of sensitivity, and printing resistance, scumming resistance and easy viewability of a water rise in the use of the original plate as the planographic printing plate. In this original plate for the planographic printing plate, an image recording layer, where an image can be formed by heat, is provided on a substrate for the planographic printing plate, which is obtained by applying electrochemical surface roughing using an aqueous solution containing at least hydrochloric acid, anodic oxidation and alkaline-metal silicate treatment to an aluminum plate. The substrate for the planographic printing plate has a grained surface with a structure wherein a large pit with an average opening diameter of 2-10 [mu]m and a small pit with an average opening diameter of 0.05-0.8 [mu]m are superposed on each other, and the average ratio of the depth of the small pit to the opening diameter thereof is in a range of 0.2-0.6. In terms of the substrate for the planographic printing plate, a surface area difference [Delta]S50, which is obtained by means of an atomic force microscope, is in a range of 20-40%, and the coating weight of Si atoms on the surface of the substrate for the planographic printing plate is in a range of 1.0-12.0 mg/m2. (C)2004,JPO&NCIPI.

An objective is to provide a planographic printing plate material exhibiting excellent properties such as printing durability, resistance to chemicals and anti-stain at the beginning of printing via restart of printing, and also a planographic printing plate exhibiting excellent properties such as printing durability, resistance to chemicals and anti-stain at the beginning of printing via restart of printing. Disclosed is a planographic printing plate comprising a support and provided thereon, an image portion and a non-image portion, wherein the non-image portion comprises a water-soluble phosphobetaine compound.

A photosensitive composition comprising: a sensitizing dye represented by the following formula (I):

in which A represents an optionally substituted aromatic ring or an optionally substituted hetero ring; X represents an oxygen atoms a sulfur atom, or —N(R₆)—; and R₁, R₂, R₃, R₄, R₅, and R₆ each independently represents a hydrogen atom or a monovalent non-metal atomic group; an activator compound being capable of causing a chemical change due to a mutual action with light absorption of the sensitizing dye represented by the formula (1) so as to generate at least one of a radical, an acid and a base; and a compound being capable of reacting with at least one of a radical and an acid so that physical or chemical characteristics thereof change irreversibly.

The invention provides a coextrusion casting polyester film and a preparation method thereof. The polyester film is made by a coextrusion casting technique, wherein the inner and outer layers are isophthalic acid modified PET (Polyethylene Terephthalate) resin and the middle layer is maleic anhydride graft modified by PP (Propene Polymer) resin. The invention further provides a preparation method of the coextrusion casting polyester film. According to the technical scheme of the invention, the polyester film provided by the invention is high in elongation at break, difficult to become fragile after being stored for long time and capable of being adhered to the surface of a metal plate, so that the problem that the single layer of casting polyester film is easy to become fragile after being stored for long time in the prior art is solved.

The invention relates to the field of ink jet printing, and discloses polyvinyl alcohol ester sulfonate, a synthetic method thereof, a hydrophilic plate for printing and application thereof, and a printing plate. The polyvinyl alcohol ester sulfonate contains a chemical structure represented as the formula (1), wherein the sum of m and n is a positive integer of 400 to 5000; n/(m+n) is 0.05 to 1;x is a positive integer of 1 to 3; A1-A4 are independently hydrogen or C1-C6 alkyl groups; M is Li, Na, K or NH4. The hydrophilic high-molecular compound can greatly improve hydrophilicity of a coating layer and improve printability of the hydrophilic plate.

The invention relates to the field of ink jet printing, and discloses a polyvinyl alcohol ester benzene sulfonate and a synthesis method thereof, a hydrophilic plate used for printing, applications, and a printing plate. The polyvinyl alcohol ester benzene sulfonate contains the chemical structure represented as the formula (I), wherein the sum of m and n is a positive integer of 400 to 5000, n/(m+ n) is 0.05-1, A1-A4 are independently hydrogen, C1-C6 alkoxyl groups or halogen elements, M is Li, Na, K or NH4. The hydrophilic high-molecular compound can greatly improve hydrophilicity of the coating layer and improves printability of the hydrophilic plate.

Provided are a curable composition including a sail compound having a) an organic anion in which, in Hansen, solubility parameter, δd is 16 or more, δp is 16 or more and 32 or less, and δH is 60% or less of δp and b) a counter cation, a lithographic printing plate precursor having an image-recording layer containing the curable composition, a method for producing a lithographic printing plate using the lithographic printing plate precursor, and a compound that is used in the image-recording layer in the lithographic printing plate precursor.

A photopolymerizable composition contains: (A) addition polymerizable compound having an ethylenically unsaturated double bond; (B) one of an alkali-soluble binder and an alkali swelling binder, (C) a titanocene compound, and

(D) a triazine compound represented by the following formula (I):

wherein Q₁ and Q₂ each independently represents a halomethyl group; X represents an electron withdrawing substituent having a Hammett's σ value of from 0 to +0.8, exclusive of a COOH group; and n represents an integer of from 0 to 5.

The invention discloses a composite hydrophillic printing substrate and manufacturing and regenerating methods thereof. The composite hydrophilic printing substrate comprises an aluminium foil, a substrate layer arranged on a side surface of the aluminium foil, a hydrophillic layer arranged on the side of the substrate layer far from the aluminium foil and an organic plate connected to the side ofthe aluminium foil which is not provided with the hydrophillic layer. The manufacturing method comprises the following steps: coating the substrate layer on at least one side surface of the selectedaluminium foil; coating the hydrophillic layer on the side surface of the substrate layer far from the aluminium foil; coating photosensitive emulsion on a side surface of the hydrophillic layer far from the aluminium foil, and coating adhesive glue on a side surface of the aluminium foil far from the substrate layer; and adhering the organic plate to the surface of the aluminium foil coated withthe adhesive glue and pressing through lamination. The regenerating method comprises the following steps: cleaning to remove ink on the printing substrate; soaking the printing substrate with solutionof a treating agent to remove a picture and text part; and coating hydrophillic dispersion on the prior hydrophillic layer to form a new hydrophillic layer. The composite hydrophillic printing substrate has simple process and low cost.

The invention brings forward a long-pressrun photosensitiser for printing of blanket and towel. The long-pressrun photosensitiser is prepared by mainly using a modified polyvinylalcohol aqueous solution, modified vinyl acetate, acrylate, an organosilicone monomer copolymer emulsion and modified photosensitive urethane acrylate. The photosensitiser provided by the invention has good long-pressrun performance. Without a long-pressrun paint, pressrun number can meet actual use requirements, platemaking process is minimized, and platemaking efficiency is raised. During production, use of the long-pressrun paint is reduced, and the damage of an organic solvent in the long-pressrun paint to workers and the environment is avoided.

The present invention provides a lithographic printing plate material excellent in printing durability, blanket stain prevention, and post-stand stain prevention; an aluminum support for a lithographic printing plate material and an aluminum support for a lithographic printing plate material imparted to the lithographic printing plate material The production method is characterized in that, for the aluminum support body, sequentially implement in the electrolytic solution with hydrochloric acid as the main body at a current density of 35A/dm ² ~150A/dm ² , Current capacity 600A×sec/dm ² ~1500A×sec/dm ² Perform AC electrolysis rough surface treatment; make the aluminum plate dissolve in 3~5g/m ² Etching treatment; in the electrolyte with hydrochloric acid as the main body, at a current density of 15-30A/dm ² , Electricity 100~400A×sec/dm ² Perform AC electrolysis for rough surface treatment; the amount of undissolved dirt remaining on the dirt in an acidic solution mainly composed of phosphoric acid is 0.05-0.3g/m ² treatment; anodizing treatment to form a rough surface.

The invention provides a polymerizable composition comprising: a binder polymer containing at least an acid group having an acid dissociation constant (pKa) of 5.5 or more and a radical addition polymerizable group, and a radical-generating compound capable of generating a radical with light or heat. Further, the invention provides a negative-working planographic printing plate precursor which has a recording layer containing the polymerizable composition. Use of the polymerizable composition of the invention provides a planographic printing plate precursor that is capable of forming high-quality images free from stains in non-image portions, and further has high strength in formed image portions and excellent printing endurance.

An objective is to provide an image recording material exhibiting an excellent exposure visualization property as well as an image formation process employing the image recording material, and further to provide not only a printing plate material exhibiting excellent on-press developability and printing durability, but also an image formation process employing the printing plate material, accompanied with an excellent exposure visualization property. Also disclosed is an image recording material possessing a support and provided thereon, a thermosensitive image formation layer, wherein the thermosensitive image formation layer contains thermoplastic spherical particles having an average particle diameter of 100 - 500 nm, and exhibits a structural color originated with the thermoplastic spherical particles.