摘要:
Provided is a method for manufacturing a sleeve printing plate capable of forming an image pattern which applies printing on an object to be printed by laser engraving without generating cracks and chippings in a printing plate made of a photosensitive resin. The method for manufacturing a sleeve printing plate by making a printing plate made of a photosensitive resin surround an outer peripheral surface of a circular cylindrical sleeve body and forming an image pattern on the printing plate by laser engraving includes the steps of: washing and cooling the printing plate with water; applying heating treatment to the printing plate at a predetermined temperature; and applying heat radiation treatment to the printing plate after the heating treatment.
摘要:
A method for manufacturing of a tool for production of synthetic image devices comprises cutting (210) a surface structured plate, giving a respective first and second edge. The plate has geometrical structures—microimages or focusing elements—in a first surface. Cells comprising the geometrical structures have a predetermined period in a first direction. The first edge is brought (212) to face the second edge in a close proximity. The first direction of a first area of the plate adjacent to the first edge is positioned with a predetermined angle with respect to the first direction of a second area of the plate adjacent to the second edge. A relative translation in said same plane between the first edge and the second edge is adapted (214) for bringing a first cell border in the first area to a predetermined distance, relative a corresponding second cell border in the second area. The first and second edges are mutually fixated (216) and mounted (218) onto a cylindrical support. A tool for manufacturing of synthetic image devices is also disclosed.
摘要:
A method of preparing a flexographic printing master including an optional elastomeric floor, an optional mesa relief, and an image relief are applied in this order on a flexographic printing support includes applying and curing fluid droplets thereby building up a plurality of layers of fluid on top of each other, wherein each fluid droplet applied is at least partially cured before an adjacent fluid droplet is subsequently applied, with the exception that a fluid droplet applied during building up at least one layer of fluid is not cured before an adjacent fluid droplet of the same layer is subsequently applied.
摘要:
A coating device for coating a peripheral surface of a sleeve body with a coating formulation includes a vertical support column for supporting a sleeve body in a vertical position coaxial with a coating axis, a carriage slideable along the vertical support column, and an annular coating stage attached to the carriage and moveable therewith for containing the coating formulation and for coating a layer of the coating formulation onto the peripheral surface of the sleeve body during a sliding movement of the carriage along the vertical support column. The coating device includes an irradiation stage that is arranged to be moveable with the annular coating stage and to provide radiation to at least partially cure the layer of coating formulation onto the peripheral surface so as to prevent flow off of the coating formulation.
摘要:
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.
摘要:
A method of making a flexographic printing sleeve forme includes the steps of forming a sleeve body by providing one or more at least partially cured uniform layers on a sleeve carrier; forming a relief image on the sleeve body by imagewise jetting a curable jetting fluid; and optionally overall post-curing; characterized in that between formation of the sleeve body and formation of the relief image no polishing or grinding is performed.
摘要:
The invention provides an extended print sleeve having a longitudinal axis and adapted to form a printing form having a circumferential seam with no printing surface disposed a distance D along said longitudinal axis from one end thereof, comprising: a first print element; and a second print element; wherein each print element comprises a separate cylindrically-shaped support having a photosensitive layer thereon and disposed at a fixed position along said longitudinal axis, and wherein said second print element has a length substantially equal to distance D.
摘要:
A method of making a photopolymer sleeve blank for use in flexographic printing is provided which includes providing a base sleeve, applying a cushion layer over the base sleeve which is substantially transparent to curing radiation, applying an optional barrier layer over the cushion layer, and applying a photopolymer layer over the barrier or cushion layer. The inner surface of the base sleeve is then exposed to curing radiation such that the radiation penetrates the sleeve and cushion layer to substantially cure a portion of the thickness of the photopolymer layer.
摘要:
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.