DE7715421U1 - PLASTER BOARD - Google Patents

Description

•. «· · FT

• ••••• O «tltl \ j

• · · t ■ C t

· ■ * f a «tti ι c

Gypsum cardboard

The invention relates to a plasterboard with an inner plaster core, the front and back with a multilayer cardboard is coated.

Such plasterboard are mainly used in the construction industry as dry plaster, partition walls, etc. The one made of plaster The existing core is encased by at least two cardboard sheets, the outermost sheet being gray-brown on the back and is colored yellowish white on the visible side. This light coloration of the visible side of the cardboard is so far caused by a yellowish white paper fiber layer (layer) that comes to lie on the outside of the plate. This The top layer of the cardboard, which characterizes the front, replaces that for further processing, such as painting, Wallpaper required basic treatment of the panel.

The production of panels of the generic type takes place continuously by unrolling a cardboard web from the roll and is edged on the outside so that the plaster of paris can be applied in a slurry form. Subsequently a second sheet of cardboard is placed so that the plaster core is covered on all sides by cardboard. After the Plaster of paris, the tape is cut into pieces of board and post-treated by placing them in a drying tunnel, so that the cardboard firmly connects to the plaster core. It has proven to be disadvantageous that such a plasterboard

7715421 10/27/77

plate due to their different carton type Front and back, which is primarily due to the application of the yellowish white layer, while the setting and drying process experiences stresses that are undesirable.

The invention has therefore set itself the task of creating a plasterboard which is easier to manufacture and whose application is safer.

According to the invention, this object is achieved in that the front and back are covered with a cardboard box of the same nature are coated, the front cardboard has a light line on the outside. That way is ensures that the front and back are made of a material of the same quality, i.e. the same absorbency and thermal expansion coefficient are coated. This means that the plasterboard according to the invention is bent and braced no longer possible during the setting and post-treatment process, as the application of coating colors on one side of paper, cardboard or the like. Their absorbency and thermal properties changes only marginally. A plasterboard of the invention Art is of the same quality as the usual ones, but it is much easier to use produce.

According to a further feature of the invention it is provided

7715421 10/27/77

■ Il till

I lit

II I 9 1 I I

mn ι ι 3 ti

4 I »»

J 9 3 111

that the cardboard consisting of several layers on the plaster side of a weakly glued layer and on the outside of one strongly glued layer is composed. The weak gluing of the plaster side layer causes a high absorbency, which enables an intimate connection between plaster of paris and cardboard and thus the adhesion of the cardboard significantly increased on the plaster core. The outer layers, on the other hand, should be strongly glued and thus to a large extent be water-repellent, which significantly improves the insulation properties against moisture.

Another embodiment of the invention provides for the paint to be produced from emulsion paint. Of course, binders and additives can be added to the actual dye to improve its abrasion resistance the color and the porosity of the cardboard in the desired way.

Finally, the invention provides that on the front and back of the plasterboard only a two-layer Cardboard is applied.

In the drawing, an embodiment of the invention is shown in a schematic cross-sectional view.

The embodiment of the plasterboard according to the invention shown in the drawing consists of one

7715421 10/27/77

Jl ■> ■ · ϊ Ϊ J

■ It

I al · · »ι

iii ·· a · ■ ι

Gypsum core 1, which is covered with a two-ply cardboard both on its underside 2 and on its top 3 is coated. The innermost layer 4 facing the gypsum core 1 consists of weakly glued and thus absorbent paper or the like. The outer layer 5, which is expediently strongly glued and thus water-repellent should, protects the inner layer 4 and the plaster core 1 from the ingress of moisture and thus increases this The insulation capacity of the plasterboard is quite considerable.

During production, the two-ply cardboard box 2, which will later form the underside, is first folded up on both sides and then introduced the plaster of paris in flooded form into this tub-like container. By aaschschlende Placing another two-layer cardboard on top of the plaster of paris is the plaster of paris core 1 on all sides coated on the outside. After the plaster of paris has set, the work is carried out continuously The produced webs are cut into pieces of board and placed in a drying tunnel, where they are finished until they are finished Hardening remain.

The application of the light line to the cardboard on the front side can be done both before the actual production of the Plasterboard as well as after its completion.

The invention recommends an emulsion paint as a means for painting. This can be done by adding binders

7715421 10/27/77

ί Il KM Mil IMI

i «Ti \ f

ι ι f f r ι r 1 ι

frr τ ι ι ι ti ι t

7 -

Od. Like. Are influenced so that the desired property both the paint and the plasterboard can be achieved. In the present case, the dash (6) is applied to the underside 2 of the plasterboard according to the invention,

The advantages achieved with the invention, in particular also through the use of only a two-layer cardboard, on the front and back it can be seen that

a) the stresses in the plasterboard are reduced;

b) the transverse strength is increased;

c) the expansion ratios are evened out;

d) Unevenness, such as wave formation, especially on the front side, is prevented;

e) the drying process during manufacture due to the high water vapor permeability of the cardboard (no barrier layer through the yellowish white fiber layer) is improved. That means one better dry adhesion and prevention of the cardboard web from jumping off the gypsum core;

f) the splitting strength is improved because of peeling the yellowish white visible layer in the dry or wet state when using the panels not applicable.

7715421 10/27/77

Claims (3)

II (III · I 1 «I» II 1 t · I Dr. "lnäV WALTE'R STÄRK PATE NTANWAUT D-4150 Krefeld 1 · Moerser Strasse 140. Telephone (02151) 28222 u, 20469 Patum Bel Please give answer Μβ, η Zelohcn 8 Ta 77 Your reference Wellkistea- und Papierfabriken Fritz Peters & Co. KG, Industriestrasse, 4130 Moers - Claims 1. Plasterboard with an inner plaster core, its Front and back is coated with a multilayer cardboard, characterized in that front and The back is coated with a cardboard (2, 3) of the same quality, the front cardboard has a light line (6) on the outside. 2. Plasterboard according to claim 1, characterized in that the plaster-side layer (4) of the cardboard is weak and the outside layer (5) is strongly glued. 3. Plasterboard according to claim 1 or 2, characterized Deutsche Bank AG Krefeld 103/1525 bank code 32070080 · Stadt-Sparkasse Krefeld 305722 bank code 32050000 · postal check Essen 4055-431 bank code 36010043 7715421 10/27/77 I I I I I I I <1 Il Il < Il. ■ I J »lilt I - 2 by a pin line (6) made of emulsion paint. Plasterboard according to one of Claims 1 to 3 »characterized by a two-layer cardboard the front and back, 7715421 10/27/77