822 results about "Flexography" patented technology

Processes are provided for depositing multiple color filter materials on a substrate to form color filters. In a first process, the surface characteristic of a substrate is modified by radiation so that a flowable form of a first color filter material will be deposited on a first area, and converted to a non-flowable form. A second color filter material can then be deposited on a second area of the substrate. In a second process, first and second color filter materials are deposited on separate donor sheets and transferred by radiation to separate areas of the substrate. A third process uses flexographic printing to transfer the first and second color filter materials to the substrate.

The present invention relates to inks and more particularly, to fluorescent ink formulations including quantum dots for various printing processes such as inkjet, flexographic, screen printing, thermal transfer, and pens. The inks include one or more populations of fluorescent quantum dots dispersed in polymeric material, having fluorescence emissions between about 450 nm and about 2500 nm; and a liquid or solid vehicle. The vehicle is present in a ratio to achieve an ink viscosity, surface tension effective, drying time and other printing parameters used for printing processes.

The present invention involves a method for making a relief image. A film that includes a carrier sheet and an imageable material is used to form a mask image that is opaque to a curing radiation. In one embodiment, the mask image is formed on the carrier sheet while in another embodiment, the mask image is formed on a receptor sheet. The mask image is then transferred to a photosensitive material, such as a flexographic printing plate precursor. The resulting assembly is exposed to the curing radiation resulting in exposed and unexposed areas of the photosensitive material. The carrier sheet or the receptor sheet may be removed from the mask image either before or after exposure to the curing radiation. Finally, the photosensitive material and mask image assembly is developed with a suitable developer to form a relief image.

A curable jettable liquid for manufacturing a flexographic printing plate comprising at least one photo-initiator, at least one monofunctional monomer, at least 5 wt % of a polyfunctional monomer or oligomer and at least 5 wt % of a plasticizer both based on the total weight of the curable jettable liquid capable of realizing a layer after curing having an elongation at break of at least 5%, a storage modulus E′ smaller than 200 MPa at 30 Hz and a volumetric shrinkage smaller than 10%.

Laser imageable flexographic printing elements, including printing plates and printing sleeves and methods of making the laser imageable flexographic printing elements using a collapsible cross-linkable material comprising a curable elastomer, a material that absorbs laser radiation at a selected wavelength, and microspheres are disclosed. A laser is used to collapse and melt the collapsible cross-linkable material to form a relief image on the printing element. The printing element is thereafter cured by face exposure to crosslink and cure the formed relief image. The invention addresses a market need for eliminating chemical processing of printing elements, thus going from printing element to press much more quickly and using an environmentally friendly process.

Apparatus and method for digitally building up flexographic plates by ink jetting plate pre-cursor material onto a substrate via an offset blanket and forming the plates by successively polymerizing the ink jet fluid.

A method of forming a photopolymer layer on a printing substrate (e.g., flexographic printing sleeves and cylinders) is provided. The method includes providing a photopolymer composition that contains a photopolymer and at least one monomer bonded to the photopolymer. The monomer can help reduce the hardness of the resulting photopolymer composition. In addition, the method also includes spraying the photopolymer composition onto a rotating generally cylindrical surface of the printing substrate. In one embodiment, the sprayed photopolymer composition is then cured. The resulting photopolymer layer is seamless and continuous and, in some embodiments, has a hardness of between about 50 to about 70 Shore A.

Flexographic printing plates and other relief images can be formed from a laser-ablatable element having a laser-ablatable layer that is at least 20 μm in thickness. The laser-ablatable layer includes a film-forming material that is a laser-laser-ablatable material or the film-forming material has dispersed therein a laser-ablatable material. The laser-ablatable material is a polymeric material that when heated to 300° C. at a rate of 10° C./minute, loses at least 60% of its mass to form at least one predominant low molecular weight product. The element can be imaged by ablation at an energy of at least 1 J/cm2 to provide a relief image.

Optically variable water-based inks, methods of providing security information, and documents are provided. The optically variable water-based inks are suitable for flexographic printing processes, and the optically variable water-based inks display a viewing angle dependent color shift between at least a first color and at least a second color. The optically variable water-based inks may be used to provide security information and to flexographically print documents.

An optical imaging head for direct engraving of flexographic printing plates, comprising: at least two groups of radiation sources, each group comprising at least one radiation source, wherein the radiation sources within each group emit radiation having the same intensity and spot size, different from the intensity and spot size of radiation sources in the other groups, said groups of radiation sources operating simultaneously.

The invention relates to a method for producing flexographic printing forms by engraving a printing relief on a flexographic printing element that can be laser engraved, said element having a photochemically cross-linked relief layer. The relief layer is transparent and comprises oxidic, siliceous or zeolitic solid matter with a particle size between 1 and 400 nm in a quantity of between 0.1 and 8 wt. % in relation to the quantity of all components in the relief layer.

Flexographic printing plates crosslinkable by photopolymerization are produced by exposing the plates to a light source and washing out (developing) with a solvent the non-crosslinked areas that are masked out during the exposure process. The invention provides terpene ester-based solvents suitable for use in the development of photopolymer printing plates. The solvents, which include terpene esters alone or terpene esters mixed with organic solvents and/or non-solvents, are effective in developing a a large number of different photopolymer printing plates and can produce images superior to those obtained with commercially available solvents currently used in such applications.

In a laser-engravable flexographic printing element, the relief-forming layer comprises a conductivity carbon black having a specific surface area of at least 150 m²/g and a DBP number of at least 150 ml/100 g. Flexographic printing plates are produced by a process in which a printing relief is engraved into said flexographic printing element by means of a laser system.

A relief (or flexographic) printing precursor has first and second radiation-sensitive layers, or a plurality of radiation-sensitive layers. The first radiation-sensitive layer is sensitive to a first imaging radiation having a first λ_max. The second radiation-sensitive layer is disposed on the first radiation-sensitive layer and is sensitive to a second imaging radiation having a second λ_max that differs from the first λ_max by at least 25 nm. An infrared radiation ablatable layer can be present and is opaque or insensitive to the first and second imaging radiations and contains an infrared radiation absorbing compound. These relief printing precursors can be used to prepare flexographic printing plates, cylinders, or sleeves where the ablatable layer is used to form an integral mask on the element. Use of the invention provides a relief image without any loss in the strength of the small dots and can be carried out using multiple irradiation steps using the same apparatus.

A flexographic printing plate is prepared from a photosensitive element having a photopolymerizable elastomeric layer with specific rheological properties. The element is imagewise exposed and thermally treated to form a relief structure suitable for flexographic printing.

A linear printing machine with exchangeable printing modules for printing on hollow bodies. The machine includes a transport system including a drive, using which the hollow bodies to be printed on are transported through the linear printing machine and at least a first printing station and a second printing station which is arranged downstream of the first printing station in the conveying direction of the hollow bodies. At least one drying station dries the ink on the hollow bodies which have been printed on. A machine controller controls at least the transport of the hollow bodies through the linear printing machine, wherein each of the printing stations is prepared to accommodate a printing module comprising a drive of its own, and wherein the printing module can be connected to the machine controller via an interface, wherein the printing modules print on the hollow bodies using a printing method selected from screen printing and/or flexographic printing and/or offset printing and/or cold embossing and/or hot embossing and/or laser colour transfer and/or inkjet.

A method of making a relief image on a flexographic print plate including imagewise exposing a mask including an imageable material disposed on a mask substrate to form an imaged mask having a mask image in the imageable material disposed on the mask substrate, the mask image including mask image areas each having a highlight value. The method further includes laminating the imaged mask to a front surface of a flexographic printing plate precursor, and exposing selected areas of the flexographic printing plate precursor to an imagewise addressable curing radiation via a back surface of the flexographic printing plate precursor based on the highlight values of corresponding mask image areas of the mask image.

A laser-engravable flexographic printing precursor or other patternable material can be laser-engraved to provide a relief image. The relief image is formed in an elastomeric, relief-forming, laser-engravable layer comprising a thermoplastic elastomeric nanocrystalline polyolefin that is melt processable. The laser-engraveable composition can be readily recycled and reformed into another flexographic printing plate precursor.

The invention relates to a flexographic printing water-based ink for food packaging, which comprises an acrylic resin binder, an addition agent, a colorant and deionized water. The flexographic printing water-based ink is good in moving resistance after solidified crosslinking is adopted and is prepared by premixing, sanding and dispersing water-based polyacrylic acid resin having no toxic effect on the human body, food-grade colorants, addition agents and the like according to a fixed proportion. The obtained ink utilizes flexographic printing to form pictures, and after high-temperature drying treatment is performed to a sample, the ink is high in adhesion, resists hot water of 80 DEG C and has a certain acidproof and alkaliproof performance. The water-based ink can replace traditional solvent ink, is applied to various plastics and paper printing, and is particularly used for the printing surface (such as the surface of a paper plate) directly contacted with food or the printing surface of a toy possibly closely contacted with sense organs of infants, thereby greatly improving safety performance.