EP0052237A2 - Papier pour béton lavé et procédé pour sa fabrication - Google Patents

Papier pour béton lavé et procédé pour sa fabrication Download PDF

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Publication number
EP0052237A2
EP0052237A2 EP81108383A EP81108383A EP0052237A2 EP 0052237 A2 EP0052237 A2 EP 0052237A2 EP 81108383 A EP81108383 A EP 81108383A EP 81108383 A EP81108383 A EP 81108383A EP 0052237 A2 EP0052237 A2 EP 0052237A2
Authority
EP
European Patent Office
Prior art keywords
concrete
paper
layer
washed
retarder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP81108383A
Other languages
German (de)
English (en)
Other versions
EP0052237A3 (fr
Inventor
Hans-Michael Pörner
Josef Dasch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mondi Inncoat GmbH
Original Assignee
PWA Kunststoff GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PWA Kunststoff GmbH filed Critical PWA Kunststoff GmbH
Publication of EP0052237A2 publication Critical patent/EP0052237A2/fr
Publication of EP0052237A3 publication Critical patent/EP0052237A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • B28B7/362—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article specially for making moulded articles from concrete with exposed aggregate

Definitions

  • the invention relates to a washed concrete paper, consisting of several layers, the cover layer containing a concrete setting retarder, and the cover layer being partially ornament-like to deactivate the retarder in these areas.
  • Usual washed concrete papers consist of a multi-layer material with the following layer structure from bottom to top: plastic-paper-bitumen-paper retarder.
  • the total thickness of the washed concrete paper is approximately 0.2 to 0.25 mm.
  • the retarder contained in the retarder layer has the task of delaying the solidification of the facing concrete on the visible surface of the wash concrete slab until the slab has hardened, so that the concrete that is still soft on the visible surface can be washed out and the desired wash concrete surface is created.
  • Washed concrete slabs are manufactured in presses at a pressure of 250 to 750 tons.
  • the washed concrete paper is placed in the press.
  • the facing is shaken in and then the filling of the back concrete.
  • the plates are pushed out of the press and placed vertically next to one another, or stored horizontally one on top of the other, until the desired strength is achieved.
  • the wash concrete paper is removed and the visible surface is washed.
  • the object of the invention is therefore to provide an ornament-washed concrete paper which can be produced both by machine and used for the fully automatic ornament plate production.
  • This paper With this paper, the production of ornamental panels with sharp contours between exposed concrete sections and washed concrete sections should be possible, with special emphasis being placed on really flat exposed concrete sections.
  • a washed concrete paper of the type mentioned which is characterized in that the oranment-like cover consists of a flexible, water-resistant and water-repellent lacquer layer with a thickness of at most 100 ⁇ m.
  • the lacquer layer of at most 100 ⁇ m used according to the invention leads to excellent results.
  • the lacquer layers can be printed on the retarder layer using the screen printing method, in particular also by machine.
  • the wash-concrete paper obtained is suitable for the mechanical production of ornament plates, and ornament plates with very good contour sharpness between exposed concrete sections and wash-concrete sections are obtained. In particular, really flat exposed concrete sections are obtained, which is not the case with the known ornament-washed concrete papers with a cardboard cover. According to the invention, there are decorative possibilities up to a very high degree of fineness.
  • ornament plates can be produced semi-automatically and fully automatically without using special negative molds or inserts.
  • the application can e.g. semi-automatically on vibrating tables and sliding presses, fully automatically on plate presses with steel matrices (e.g. Rinopresses and similar processes) or, depending on the grain size of the header, also on presses with the hardest possible rubber matrices.
  • a prefabricated concrete with an increased proportion of fine grain and stone powder is preferably used for the production of ornament plates using the ornament papers according to the invention.
  • the invention further relates to a process for the production of wash concrete paper with an ornament-like covering of the retarder layer, which is characterized in that, in the case of a conventional wash concrete paper, the retardation layer is partially covered in an ornament-like manner by printing in a screen printing process with a flexible, water-resistant and water-repellent lacquer with a dry layer thickness of at most 100 ⁇ m.
  • This type of process makes it possible, in addition to large runs, to machine even the smallest quantities at low cost.
  • lacquer refers both to the lacquer solutions used for the screen printing process and to the lacquer film covering remaining after drying. However, all thicknesses refer exclusively to the dry film thicknesses.
  • This lacquer layer has a maximum thickness of 100 ⁇ m, preferably up to 50 ⁇ m, with film thicknesses of 7 to 12 ⁇ m leading in practice to particularly good results.
  • Increasing the paint film thickness beyond 100 ⁇ m has no further advantage; on the contrary, one has to expect various disadvantages.
  • higher paint film thicknesses naturally require a higher paint coat need.
  • such lacquer film thicknesses are difficult to achieve without special measures with regard to the lacquer composition and the printing technique in the screen printing process, and finally, with larger lacquer film thicknesses, tension on the paper surface can also be expected, which in turn can endanger the flat position of the overall sheet.
  • the lower limit of the coating film thickness is not sharp and depends to a certain extent also on the properties of the coating used and the retarder type of the paper. A minimum thickness is therefore necessary in order to prevent diffusion of the retarder through the paint film under the influence of the concrete milk, since otherwise the contours between the exposed concrete sections and the washed concrete sections will be blurred.
  • the desired lacquer covering pattern is preferably applied with a single screen printing process.
  • the above-mentioned preferred range of the lacquer film thickness of 7 to 12 ⁇ m can be easily achieved.
  • a flexible, waterproof and water-repellent lacquer is used. It is preferably ensured here that the dried lacquer films are non-blocking, so that when using the ornament wash concrete papers printed according to the invention for the fully automatic production of ornament plates, faults are avoided with certainty.
  • the flexibility of the varnish is necessary so that the varnish film adheres well even when the printed wash concrete paper is bent or even kinked.
  • the paint film should be covered by the grain of the facing concrete must withstand high deformations due to high pressures without significant damage in order to prevent the retarder from penetrating at these points.
  • the varnish used according to the invention must also be water-resistant for a long time, since the washed-out concrete slabs usually store for up to 24 hours after being pushed out of the press with the washed-in concrete paper attached to them.
  • the lacquer film must not be attacked by the alkaline-aqueous environment of the concrete milk, in particular it must not happen that the retarder passes through the lacquer film, or that the washed concrete paper blisters at the areas masked with lacquer or even completely at these points the ornament plate.
  • the paint used must also be water-repellent in order to prevent concrete milk containing retarders from infiltrating the areas of the washed concrete paper masked with paint and thus again causing a blurring of contours. It is therefore preferable to ensure that the paint does not contain too many hydrophilic groups. Possible hydrophilic groups of solvents must also be taken into account here, since solvent residues generally remain stubbornly enclosed in the paint film.
  • the coating solutions used for the screen printing process must on the one hand have the highest possible solids content in order to achieve the desired coating film thicknesses; on the other hand, the viscosity of the coating solutions must meet the requirements of the screen printing technology used. In many cases compromises have to be made.
  • the binder base of the varnish does not play a special role in itself, provided the required properties with regard to elasticity, water resistance, water repellency and non-blocking are given.
  • Varnishes based on Polyacrylic acid esters and polymethacrylic acid esters have been tried and tested. Examples include the methyl, ethyl, propyl and butyl esters. If these acrylic resins are too hard or too soft when used alone as binders, the desired elasticity and non-blocking can be adjusted by adding other binders or by mixing them together.
  • Polymethacrylic acid butyl esters which are commercially available either in dissolved form or as solid resins are preferred, optionally in combination with smaller amounts of a binder which improves the antiblocking properties.
  • the solvent system is not subject to any particular restriction, with sufficient dissolving power for the paint components being taken for granted.
  • aromatic solvents such as toluene are used; Ketones; or esters, such as butyl acetate or butyl glycol acetate.
  • the solvent system preferably takes care that the solvent power for the retardant used, e.g. Sugar, is as low as possible.
  • sieves with a fabric thickness of 100 to 400 ⁇ m, preferably about 200 to 250 ⁇ m and lacquers with a solids content of 30 to 60% are used.
  • the method of the invention is suitable for printing conventional wash concrete papers.
  • Suitable are e.g. Papers with the following layer structure from bottom to top: plastic-paper-bitumen-paper retarder or plastic-paper retarder. These washed concrete papers have thicknesses of approximately 0.1 to 0.25 mm.
  • a washed concrete paper with a retarder layer is used, which has a slow water solubility due to a special addition to the retarder formulation.
  • a special addition to the retarder formulation For example, by adding about 10 to 12% by weight of polyvinyl alcohol to the retarder mass, calculated on dry substances, to delay the retarder release by about 5 to 10 seconds.
  • polyvinyl alcohol it is also possible to use other water-soluble binders which delay the release of the retarder into the aqueous phase.
  • V erzögerer GmbH 12 and resist mask 13 correspond to the layers 2 and 3 in Fig. 1.
  • the total thickness of the aggregate concrete ornament paper in Fig. 2 is 0.12 mm.
  • FIG. 3 shows a perspective illustration of the wash concrete ornament papers from FIGS. 1 and 2.
  • the resist mask 3, 13 is in each case on a commercially available washed concrete paper.
  • the lacquer mask 3, 13 with a thickness of approximately 10 ⁇ m was produced in one operation using the screen printing method using a lacquer according to the following example.
  • Both washed concrete ornament papers deliver washed concrete ornament plates with excellent contour definition and a particularly flat exposed concrete surface where the paint mask 3, 13 is located.
  • other ornaments are also possible, especially with a complicated pattern.
  • the example explains the invention.
  • a paint which, based on 1000 parts by weight, 267 parts by weight of butyl polymethacrylic acid, 67 parts of ethylhydroxyethylcellulose, small amounts of dye and other auxiliaries, remainder mixed solvents made from aromatic hydrocarbons (toluene, xylene and others) and esters (butyl acetate, butylglycol acetate).
  • wash concrete ornament papers obtained are then connected send used for the production of wash concrete ornamental panels. Here you get sharp-contoured ornament panels with particularly flat exposed concrete sections.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP81108383A 1980-11-14 1981-10-15 Papier pour béton lavé et procédé pour sa fabrication Withdrawn EP0052237A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3043064 1980-11-14
DE3043064A DE3043064C2 (de) 1980-11-14 1980-11-14 Waschbetonpapier und Verfahren zu seiner Herstellung

Publications (2)

Publication Number Publication Date
EP0052237A2 true EP0052237A2 (fr) 1982-05-26
EP0052237A3 EP0052237A3 (fr) 1983-06-29

Family

ID=6116826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108383A Withdrawn EP0052237A3 (fr) 1980-11-14 1981-10-15 Papier pour béton lavé et procédé pour sa fabrication

Country Status (6)

Country Link
EP (1) EP0052237A3 (fr)
JP (1) JPS57109605A (fr)
DE (1) DE3043064C2 (fr)
DK (1) DK443081A (fr)
NO (1) NO813852L (fr)
ZA (1) ZA816956B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009035267A1 (de) 2009-07-29 2011-02-03 Fabrino Produktionsgesellschaft Mbh & Co. Kg Wasserbasiertes Beschichtungsmittel
DE102010052250A1 (de) * 2010-11-23 2012-05-24 Hebau Gmbh Waschbeton-Kontaktverzögerer für Betonschalungen mit filmbildender Trennfunktion
WO2017046308A3 (fr) * 2015-09-17 2017-05-11 Kennwert RD GmbH Procédé de réalisation d'un profil topographique altimétrique et de pistes conductrices électriques sur une surface en béton

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2545864B2 (ja) * 1987-06-24 1996-10-23 大日本印刷株式会社 化粧コンクリ−ト
FI990326A0 (fi) * 1999-02-17 1999-02-17 Janne Samuli Naamanka Menetelmä kuvioidun betonipinnan aikaansaamiseksi

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7504533U (de) * 1975-02-14 1976-01-29 Krause, Hermann, 5909 Burbach Vorrichtung zur Herstellung bemusterter Waschbetonplatten
US4055322A (en) * 1975-11-13 1977-10-25 Cassidy Hugh I Permeable liner having concrete setting retardant
DE2604516A1 (de) * 1976-02-06 1977-08-11 Hebau Vertrieb Gmbh Waschbetonpapier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009035267A1 (de) 2009-07-29 2011-02-03 Fabrino Produktionsgesellschaft Mbh & Co. Kg Wasserbasiertes Beschichtungsmittel
EP2289859A2 (fr) 2009-07-29 2011-03-02 Fabrino Produktionsgesellschaft mbH & Co. KG Moyen de revêtement à base d'eau
DE102010052250A1 (de) * 2010-11-23 2012-05-24 Hebau Gmbh Waschbeton-Kontaktverzögerer für Betonschalungen mit filmbildender Trennfunktion
WO2017046308A3 (fr) * 2015-09-17 2017-05-11 Kennwert RD GmbH Procédé de réalisation d'un profil topographique altimétrique et de pistes conductrices électriques sur une surface en béton

Also Published As

Publication number Publication date
ZA816956B (en) 1982-09-29
NO813852L (no) 1982-05-18
DK443081A (da) 1982-05-15
DE3043064C2 (de) 1983-07-28
JPS57109605A (en) 1982-07-08
DE3043064A1 (de) 1982-07-15
EP0052237A3 (fr) 1983-06-29

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Effective date: 19840630

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Inventor name: DASCH, JOSEF

Inventor name: POERNER, HANS-MICHAEL