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Method for indirectly applying printing liquid to a printing substrate

A printing material and liquid technology, applied in printing, copying/marking methods, printing devices, etc., can solve the problems of printing ink detachment and transmission, and achieve the effect of improving detachment, strong fluidity, and detachment improvement

Inactive Publication Date: 2015-05-27
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A problem that may exist in the above devices and methods of the prior art is that the printing ink is not completely or substantially completely detached from the intermediate carrier and transferred to the printing material

Method used

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  • Method for indirectly applying printing liquid to a printing substrate
  • Method for indirectly applying printing liquid to a printing substrate
  • Method for indirectly applying printing liquid to a printing substrate

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0128] A rubber belt is provided as intermediate carrier 2 , the structure of which is preferably comparable to that of offset blankets. An approximately 2 μm thick layer of TPnB (tripropylene glycol n-butyl ether, eg product tripropylene glycol butyl ether TPnB) is applied to the rubber belt by means of spray beams 18 . Water-based and binder-based inks are applied last.

example 2

[0130] A Teflon-coated conveyor belt is provided as intermediate carrier 2 . An approximately 4 μm thick layer of DPM is applied thereon as a separating layer (dipropylene glycol methyl ether, eg the product dipropylene glycol methyl ether DPM). The application can be effected by means of a roller system, in particular similar to an offset dampening device. A thin dispersed varnish layer of approximately 0.1 to approximately 1 μm is then applied, which is dried and then forms a skin on the DPM. A separate dryer can be provided for this purpose, in the figure 1 is not shown but can be placed directly behind the application device 18 . Water-based and binder-based inks, in particular so-called latex inks, are applied last.

example 3

[0132] A belt or a roller cover is used as intermediate carrier 2, the material of which is comparable to known offset blankets. A thin oil layer of approximately 0.1 to approximately 1 μm, in particular a vegetable oil such as sunflower oil, is applied as a separating layer to the intermediate carrier. Finally the organic solvent based ink is applied.

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Abstract

A method for the indirect application of printing liquid onto a printing material provides an intermediate carrier, preferably a circulating belt, a liquid conditioning medium including a first substance applied onto the intermediate carrier and a printing liquid, in particular an inkjet ink, including a second substance applied onto the conditioning medium on the intermediate carrier. The printing liquid is situated as droplets or a layer substantially on the conditioning medium and the droplets or the layer form a contact region on their underside with the conditioning medium. The printing liquid is heated, preferably by way of a dryer and the printing liquid is transferred from the intermediate carrier onto the printing material.

Description

technical field [0001] The invention relates to a method for the indirect application of a printing liquid to a printing substrate. Background technique [0002] Various methods and devices for indirect inkjet as described above are known from the prior art. In this case, a plurality of inkjet printing inks or inks are applied, ie sprayed, onto a surrounding intermediate carrier by means of inkjet printing heads positioned behind one another, depending on the printing image. The printing ink or the multicolored printing image is transferred from the intermediate carrier, for example a transfer belt or a transfer cylinder, to a substrate, for example a sheet or a paper web. The coloring is thus not transferred directly but indirectly via the surface of the transfer device to the substrate. The surface must therefore be realized or treated in such a way that the necessary ink transfer is possible, that is to say the surface must accept the ink and again be able to emit optio...

Claims

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Application Information

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IPC IPC(8): B41J2/005
CPCB41J2/005B41J2/01B41J2/20B41J2/435B41J2/475B41M1/14B41M1/42B41J2/0057B41M5/0017B41M5/0256B41J11/0021
Inventor B·拜尔M·格赖弗P·哈赫曼A·豪克R·金德根A·毛尔R·米勒H·皮茨A·朔伊雷尔M·施勒霍尔茨M·施万特
Owner HEIDELBERGER DRUCKMASCHINEN AG
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