DE7341346U - Embossable, web-shaped print carrier - Google Patents

Description

Px 73 41 ⁷ ; 46.4 - J February 25, 1974 A 674

Applicant: E. Holtzmann & Cie. AG, Weisenbachfabrik

<1 Embossable, web-shaped one Print carrier)>

The invention relates to an embossable, single or multiple coated, web-shaped print carrier in particular for wallpaper paper to be printed in gravure or flexographic printing and a manufacturing process for such a print carrier.

In the conventional printing technology for the production of wallpapers, machine-smooth, wood-containing tepet base papers are used used, which have a low smoothness or high roughness and a relatively high, specific Vuiumen (approx. 1.2 to 2 cm / g) have. In order to maintain good embossability, these papers are in the course of their The manufacturing process in the paper machine is only weakly compressed with smoothing machines and is weak in this way smoothed. A separate smoothing process, e.g. with the help of a

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Superkaiander, which is commonly used for the production of high-quality, graphic papers for gravure printing is, at dar Urzeugung τοη wallpaper base paper with consideration of the desired embossing ability to Tenaeiden. Even the smoothness of these papers is kept within limits by adding τοη fillers to the substance input, e.g. kaolin, taking into account the embossability, among other things, technological properties on an ignition residue τοη the highest 15 - 20 percent by weight of the paper.

When using the high-pressure glue printing method in wallpaper printing technology, the printability properties of the standard wallpaper base paper used for this are not affected made special demands. For higher quality requirements, the printability property can be changed to Standard wallpaper base paper by applying an aqueous pigment-binder coating a τοη approx. 10 - 30 g / m Application weight with the help of a Terbessem air brush coating device. Such surface protection is a known as Fondstilche.

In the wallpaper industry, in addition to the high pressure glue printing process, the deep drusher process and there Flexographic printing * is used with growing proportions. These printing techniques are known, for example, from the production of weekly or fashion magazines or Tom Verpackungsföl: endruck. The gravure printing process provides to achieve high print quality particularly high demands on the surface quality of the printing paper, namely such that the surface is as high as possible

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Must have evenness, straightness and smoothness, if A complete and contoured transfer of the Printing inks on the dots on the rotogravure cylinder on which «printing paper is guaranteed». light or only unrolled anadxuokende fiaetorpunkte de » Tiefdruoksylimders are known in the professional world as so-called "missing Basterpuakte" or "niaaing dots". These Printing errors cause an uneven, "rapping", optitch uniureiohenden impression of the printed image «» hexrer.

The previously known, embossable struck supports only wallpaper

proven for intaglio printing because of their rough or insufficiently closed surface structure as largely unsuitable. When applying the known Fondatrlohe at the place the coarse micro-structure of the stripe surface and the rough, naso-smooth paper surfaces tone umgostrlohen standard Euro-papers self-evident above case »no re-obtainable Sruokunterlage given ·

Also used for wallpaper production Flexoprinters are about a floohdmckTorfa & ren with elajitl-looking printing forms, which »war dem naagel a great smoothness of the printing paper surface be able to compensate for their xlastisity to a certain extent. However, the quality of the Dsrackurgcbmisscs, for example besuglioh Brillatis, Druckglan », Kcntsastffektumg and optical density at Torget; ··· *** color consumption also through su high construction and gross ifagltlohmäflrtlten in the Druckpapi # röb «rfläeh · sewn tilig bceimflmfit.

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Papers that are smooth as a single layer or coarse, puffed up or glued cardboard with a smooth cover on one side »Was better printability than the machine-smooth, commercial standard tape-based base papers. she however, due to their "open" structure of the paper surface, by no means meet particularly high spray rates Quality of the BruokerseugBlsses mainly in gravure printing.

The task is based on the task of creating a printable, single or low-quality print carrier, in particular for wallpapers that are printed in rotogravure or flexographic printing, with the customary toe wallpaper paper required, such as strength properties in the known extent, ability to be tested should be preserved. The Keaaseiehneads de? Irfindeag can be seen in the fact that the Tanetengrundnaterial has at least one exceptional layer made of Pigaefttsa and binders in Cllttsohaber coating, the epeaifieohe volume of the finished Bruskirftger being greater than 1.2 on ³ / g. Such an approved print carrier, which is produced without smoothing using the Glittsohaber method, results in an extremely smooth surface, which is why printing in rotogravure or flexographic printing is not suitable, without that the usual ligth-like iron α wallpaper papitrea, in particular the prageability made 11 ig <, are influenced. There is a c-print surface similar to art, on which fir & okergebitiae, especially in rotogravure, can be obtained even if it is calibrated

734134 $ i2.i,

especially difficult to reproduce semitones and if the occurrence of so-called "missing dots" is excluded shall be.

Thorough investigations have shown that the carbon scraper brush experience has particular technological advantages compared to other known coating processes, which, for example, old air brush coating devices, Roller squeegee streaks are carried out with caution or whale coating devices. These do not produce the desired or even comparable print results.

The base material for the wallpaper can be either a conventional, machine-smooth wallpaper base or a cardboard box. There is no further advantage for anyone who * da «has a smooth surface on one side of the wallpaper base material. If the Ta ^ ttteaeruaoaatarlal has a ready · \ η « eLnstiti ^ smooth surface, 4er PltfMnt-BondteitULetrich especially · duaa usv4 iaalt wlrtsehaf Uioh can be punished without the aaeeetrebtea being affected. Such tapes "4jru &daaterlalLeii" are therefore produced in a unique "smoothness" manner. It \ '\ ü% «loh but also ain · one-sided flatUr, aehrla <| l (er, gepauUohUr or glued cardboard can be used.

The method of manufacturing a support of the specified

Art is expediently carried out in such a way that the coating slip containing pigments and binders is used exclusively Help clay smoothing scraper coating devices is applied to the wallpaper base material, and that the coating material is ready to use immediately after drying is complete Surface is a goal · A particular advantage in the production of the specified print carrier according to the invention is to be seen in the fact that the printable paper surface can be used without the subsequent use of τοπ other mechanical smoothing devices, which are usually, s.B. in the production of other graphic papers, such as magazine papers in connection with a smoothing doctor spreading device for Manufacture ron gravure papers are used. By the Avoiding such a subsequent, mechanical smoothing, e.g. with the help of a supercalender, is associated with the application of the invention, a compaction of the Termieden leaf structure, which would reduce the ability of the wallpaper base paper to be embossed. the Subsequent use of a machine smoothing unit in the same work step of the smoothing doctor coating should not be done excluded because this serves a different purpose, namely a calibration or improvement of the plantation and Dimensional stability of the wallpaper paper · These properties can suffer as a result of the application of the water-based coating material due to the swelling of the wallpaper base material «

If necessary, the smoothing doctor blade device can be a Be downstream of the brush direction, which results in an advantageous increase in the gloss effect of the applied pigment-binder coat.

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When removing smooth stadard paper, it can be difficult to apply a finishing coat on the pigments and binding with an application weight of 5-30 g / n, the torsion is also applied with the help of a smoothing device. According to a further development of the invention, this primer coat can be one or more Deekstrieh pigments and binders, each with an application weight of 5-30 g / a ^{2, with the} help of one or more smoothing butt coating devices, since it generally does not yet provide the desired coverage and the the desired printability "properties on a standard wallpaper base paper".

When using the features described, an embossable, single or multi-layer coated print carrier, especially for tape that is printed in gravure or flexographic printing » which has favorable printability properties. The specified manufacturing experience is 1st old Help 3 of the known Glättsehaber spreading devices easily and economically feasible.

Completion game 1

Is glued buplex cardboard old neck-free, one-sided smooth cover with the following properties:

ο Weight per unit area: 150 g / m

ρ
(Cover: 60 g / m, wood-free, smooth on one side,

2 2

Carrier: 60 g / m, containing wood pulp, glued with 10 g / m Starch paste)

Thickness: 0.156mm

specific volume: 1.21 cm / g

Smoothness according to Bekk: 160 sec.

the one-sided smooth side

Bendtsen roughness: 41 ml / min,

the one-sided smooth side

Ink consumption for opt. Density 1.2: 3.10 g / m with the Prüfbau test printer

Blackening value, S = 94.0 1 »\

( ς - resignation unprinted - remission printed , _nn . "^ ^b ~ remission unprinted" ^x ' ^{JU in; <}

with HAINDL-EINLEHNER gravure test printer is with the help of a G-scraper coating device

2 2

20 g / m application weight to a final weight of 150 g / m coated: The coating color has the following composition: Solids content: 50 percent by weight Pigment content: 90 T calcium carbonate

10 T aluminum silicate 0.4 T dispersant

Binder: 10 1 ° plastic dispersion polyacrylate

1 Io CMC

in each case calculated absolutely dry on the basis of pigment.

The coated paper has the following properties:

Weight per unit area: 148.8 g / m ² Thickness: 0.179 mm specific volume: 1.20 cm ⁵ / g Smoothness according to Bekk: 220 sec Roughness according to Bendta en: 55 ml / min Print colors use for opti cal density $ 1.2 1.58 g / πΤ Blackening value: S - 97.2 *

The usability test with the Prüfbau test printer gives excellent optical density values with very little Farby custom. The printability test with the HAIWDL-EINLEffliEE rotogravure printing test device results in an outstandingly closed, practically τοη "missing baster prints" -free printing case. The Drackergshnisse are looking » borrowed "missing baster points" clearly better than those of Coating orders that can be obtained with other known coating processes, see B. with an air brush coater, a boll squeegee or a Walsejattreicheinrich tion. The embossing ability of the coated cardboard is excellent.

Atta guide example 2

A conventional, holsschliffhaltiges, masehinenglattes Standard base wallpaper paper with the following properties' »

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Weight per unit area: 80 g / m ² Thickness: 0.143 mm specific volume: 1.81 cmVg Pulp content of the fiber substance
of the fapieress 35 weight percent Wood pulp portion of the fiber substance
of the paper: 65 percent by weight Glow residue of the paper: 18 percent by weight Gluing: 5/4 Smoothness according to Bekk: 10 tek, Bendtsen roughness: 571 ml / min.

is in each case with the help of a smoothing doctor coating device

2 with a primer τοη 30 g / m and a top mark τοη 20 g / m coated onto a surface weight of τοη 130 g / m. The composition of the coating slip is as in Example 1.

The printability properties are comparable to those in embodiment 1.

In the drawing, an aluminum guide example of a print carrier according to the invention is shown schematically on an enlarged scale. On a conventional machine-smooth wallpaper base paper 1, one can _{see a coating 2 produced by a smooth doctor brush application, including} pigments and binders.

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Claims (4)

Protection claims 1. Embossable, single or multiple coated, web-shaped print carrier, in particular for wallpaper paper to be printed in rotogravure or flexographic printing, characterized in that that read at least one wallpaper base material exclusively with a smoothing scraper brush application has produced coating of pigments and binders, the specific Volume of the pressure medium is greater than 1.2 cmVg. 2. Print carrier according to claim 1, characterized in that that the wallpaper base material is a conventional, machine-smooth wallpaper base paper is. 3. Print carrier according to claim 1, characterized in that the wallpaper base material is a cardboard box. 4. Print carrier according to claim 2 or%, characterized in that the wallpaper base material has a smooth surface on one side.