EP2694730A1 - Verfahren zur herstellung eines gips-haltigen papiers - Google Patents
Verfahren zur herstellung eines gips-haltigen papiersInfo
- Publication number
- EP2694730A1 EP2694730A1 EP11748608.4A EP11748608A EP2694730A1 EP 2694730 A1 EP2694730 A1 EP 2694730A1 EP 11748608 A EP11748608 A EP 11748608A EP 2694730 A1 EP2694730 A1 EP 2694730A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gypsum
- paper
- application
- parts
- core
- 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.)
- Granted
Links
- 239000010440 gypsum Substances 0.000 title claims abstract description 196
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 196
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000006185 dispersion Substances 0.000 claims abstract description 32
- 239000002245 particle Substances 0.000 claims abstract description 20
- 229920000881 Modified starch Polymers 0.000 claims abstract description 12
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 239000004368 Modified starch Substances 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 235000019426 modified starch Nutrition 0.000 claims abstract description 9
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 26
- 238000000576 coating method Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 12
- 239000011505 plaster Substances 0.000 claims description 11
- 229920002472 Starch Polymers 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 9
- 239000008107 starch Substances 0.000 claims description 9
- 235000019698 starch Nutrition 0.000 claims description 9
- 239000013078 crystal Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 4
- 150000004683 dihydrates Chemical class 0.000 claims description 3
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 3
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical group [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims 1
- 239000012047 saturated solution Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 claims 1
- 239000000123 paper Substances 0.000 description 109
- 239000011111 cardboard Substances 0.000 description 22
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000011087 paperboard Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000004049 embossing Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229920002261 Corn starch Polymers 0.000 description 1
- 235000019759 Maize starch Nutrition 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 229940105329 carboxymethylcellulose Drugs 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- AJDUTMFFZHIJEM-UHFFFAOYSA-N n-(9,10-dioxoanthracen-1-yl)-4-[4-[[4-[4-[(9,10-dioxoanthracen-1-yl)carbamoyl]phenyl]phenyl]diazenyl]phenyl]benzamide Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1C=CC=C2NC(=O)C(C=C1)=CC=C1C(C=C1)=CC=C1N=NC(C=C1)=CC=C1C(C=C1)=CC=C1C(=O)NC1=CC=CC2=C1C(=O)C1=CC=CC=C1C2=O AJDUTMFFZHIJEM-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000012015 potatoes Nutrition 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000001043 yellow dye Substances 0.000 description 1
- -1 z. For example Substances 0.000 description 1
Definitions
- the present invention relates to a process for the production of a gypsum-containing paper, in particular a paper which is designed and determined as a front and / or backside paper of a gypsum board.
- the invention also relates to a coated paper, in particular designed as a front and / or backside paper of a gypsum board and certain paper.
- the invention relates to a gypsum board, comprising a gypsum core and at least one attached to the gypsum core paper. Likewise, the concerns
- Invention a method for producing a gypsum board.
- a process for producing paper is described, for example, in DE 11 2004 001 313 T5.
- a papermaking pulp containing fillers is fed with a predetermined consistency in a forming area of a paper machine, water is removed from the pulp by dewatering the pulp through a water-permeable base, such as a long grid, and drying and rolling a paper web so produced to produce a finished paper product ,
- the paper pulp is made with certain fillers, among others. based on calcium hydroxide (Ca (OH) 2 ). This ensures that certain properties, such. As optical properties and the strength of the paper produced, can be influenced in the desired manner.
- Gypsum boards typically consist of a gypsum core located between two paper or board webs. During production, two cardboard or paper rolls are unrolled and the space is filled with a stucco suspension. The Stuckgipssuspension are usually buried various additives, such as starch, surfactants, setting accelerator, etc.
- a suitable as a coating paper for plasterboard paper is z. As described in EP 0521804. There it is suggested that the paper with a
- Pigment layer is coated, which is based on at least one mineral filler of light color and having at least one binder.
- the coating described there is a particularly bright, white appearance of the In addition, it should be achieved that a subsequent application of ink need be less opaque, as with a gray or brown front side paper Finally, the should there described coating decoupling between the
- Front paper and a subsequently applied layer effect, such as a paper wallpaper is decoupled such that paper wallpaper on the
- Coating paper can be attached and removed without tearing the coated paper from it.
- Cardboard is differentiated from paper in different sources:
- the raw board consisting of the two cardboard layers and the gypsum suspension z. B. passed through a forming station and transported on a Abbindeband and finally on a roller conveyor.
- the "binding" takes place, ie the calcium sulfate hemihydrate (CaS0 4 V2H2O) becomes calcium sulfate dihydrate (CaS0 4 2H 2 0) .
- the resulting plate is separated with a suitable knife or pair of scissors and placed in The plate dryers typically operate with a strong air flow, which is conducted transversely to the transport direction or longitudinally.
- the gypsum boards are still wet when transported in the dryer, so it is a first important requirement of the paper that it has a high wet grip and is not blown off the gypsum core in the drying process when exposed to sometimes strong air currents.
- the wet grip can z. B.
- the aqueous gypsum suspension penetrates into the paper and that there crystallize gypsum needles in the cellulosic layer.
- the gypsum needles represent a mechanical bond between the plate core and the paper.
- the speed of the setting essentially determines the achievable production speed.
- the setting z. B. by addition be accelerated by the finest dihydrate as a crystallization nucleus in the gypsum suspension.
- the penetration process of the stucco suspension in the paper must take place just as quickly. Sometimes the paper is heated by burners and the penetrability of the paper is improved as the gypsum slurry is applied during cooling.
- the starch may be pregelatinized and water-soluble. In the stream of evaporating excess water in the plate dryer, the starch enters the boundary layer between the cardboard and the gypsum core, where it acts like a paste or adhesive.
- Cardboard web before setting at least one of the board webs is acted on the side facing away from the gypsum with negative pressure.
- gas bubbles generated in the area of the cardboard are to be destroyed, thereby increasing the contact area between cardboard and gypsum and thus improving the bond.
- a gypsum board is presented with a sub-carton, a top board and a gypsum layer arranged between the two layers of cardboard, wherein at least one of the two layers of cardboard is provided with a structure embossing produced before the setting of the gypsum layer. The by the embossing on the inside facing the plaster mass inside
- Gypsum core can replace.
- the known measures require costly changes to the production process.
- DE 101 39 420 AI it is necessary that the production facilities are converted such that they provide a means for suction, z. B. can accommodate a suction box or a suction roll.
- DE 197 43 385 AI the paper must be provided with a pattern embossing, which is also possible only with complex additional process steps. In the case of EP 0521804, in turn, the paper can only be painted slowly and inefficiently due to the high viscosity.
- PCT / EP2011 / 055088 discloses a process for making a paper or board from a slurry of cellulosic fibers.
- the method is characterized in that the slurry is mixed with gypsum prior to paper or cardboard formation and the paper or paperboard formed from the slurry is dried at a temperature above 110 ° C., so that calcium sulfate hemihydrate forms in the paper or cardboard.
- Adhesive properties of the paper to the gypsum cores are achieved, it would often be desirable to achieve an even higher proportion of gypsum in the paper than is possible only by means of the above-mentioned admixture in the pulp.
- it would be fundamentally conceivable to "paint" paper with a gypsum application but in the case of the gypsum particles dispersed in water or in other solvents, it is problematic that the gypsum dispersion has a high viscosity and therefore only a very slow application of gypsum -Dispersion is possible.
- a gypsum coating is applied to one or both surfaces of the paper, wherein the gypsum application in the dried state based on 100 Parts gypsum particles additionally comprises the following components: at least 20 parts, in particular at least 30 parts of binder in the form of a low-viscosity modified starch and between 0.1 and 0.5 parts of dispersant.
- the object is achieved by a coated paper, in particular a formed as a front and / or backside paper of a plasterboard and certain paper, preferably prepared, according to one of claims 1 to 11, with one on one or both sides of Applied gypsum application of 5 g / m 2 to 40 g / m 2 , in particular from 8 g / m 2 to 35 g / m 2 , wherein the gypsum application in the dried state based on 100 parts gypsum particles additionally comprises the following components: at least 20 parts, in particular at least 30 parts of binder in the form of a low-viscosity modified starch and between 0.1 and 0.5 parts of dispersant.
- a gypsum board comprising a gypsum core, and at least one paper attached to the gypsum core according to one of claims 12 to 19.
- the object is achieved by a method for producing a gypsum board, with the steps: forming a gypsum core from a stucco plaster, providing a gypsum coated paper, in particular according to one of claims 12 to 19, and Producing a gypsum board from the gypsum core and the paper, wherein the gypsum slurry enveloping paper absorbs gypsum-saturated water from the gypsum slurry and this is the stucco gypsum located on the surface of the paper to form "linker crystals" in calcium sulfate dihydrate, with parallel thereto Calcium sulphate dihydrate crystallized from the stucco solution and the linker crystals forming in the paper act as crystallization nuclei.
- the binder-modified starch has the task of connecting the gypsum particles with the paper so that even in the typical stress both during production and when attaching the paper to a gypsum core does not come to a detachment of the gypsum, in particular by in that the dispersion penetrates deeper into the paper or the paper layers.
- other binders may be provided in the gypsum dispersion, z.
- latex particles can be used.
- Carboxy-methyl cellulose or polyvinyl alcohol may be provided.
- the dispersant serves to prevent excessive clustering of the gypsum particles.
- the dispersant allows a maximum solids content while maintaining good shelf life of the dispersion.
- the dispersant sodium polyacrylate common in paper coating can be used.
- the dispersant Sokolan may also be added.
- starch modified only in relation to low viscosity results in a sufficiently low viscosity of the entire dispersion.
- low-viscosity modified starch can, for.
- dextrination or acid hydrolysis can be used to reduce the viscosity of cooked starch. This starch can then be used in high concentration and processed even when hot.
- the dispersion here also additional materials can be added.
- the stucco gypsum crystallites which form on the surface of the paper after application and drying of the dispersion, are reactive and rapidly form gypsum with water. It is thus possible to produce in a simple manner a paper with so-called “linkers or anchor crystals", which has particularly advantageous adhesion properties In the marginal area of the gypsum paper core, they intertwine intensively with the forming needles of the paper
- the dispersion with calcium sulfate dihydrate can be applied to both surfaces of the paper, advantageous adhesion properties also result on the side of the paper which does not face the gypsum core. If the coated layer is an outer layer, z. Gypsum plasters and gypsum-based leveling compounds in final coatings considerably better. On a primer can be advantageously dispensed with. Also FugendeckstMake adhere better to such on the outside coated paper.
- the application of the dispersion can be carried out by any known coating method.
- the gypsum-containing can be applied in excess to the paper and then the excess with a blade are removed again (so-called Bladestich).
- the modified starch is a modified corn starch.
- Elaborate series of experiments have shown that with modified maize starch particularly high solids content of gypsum particles could be achieved and also has the dispersion during processing particularly advantageous properties.
- the gypsum particles are dispersed directly into a starch solution.
- the dispersion takes place with interruptions. This is advantageous, since thus clustering of the gypsum particles can be prevented.
- a uniform dispersion of the gypsum particles is first achieved before further gypsum particles are then added.
- the dispersion is monitored by sensors and the addition of further gypsum particles is only then initiated by an electronic control system, if sufficient dispersion of the agglomerated gypsum particles has been achieved.
- the application takes place by means of a press or an applicator roll.
- these application methods are particularly well suited for the application of the dispersion with calcium sulfate dihydrate.
- the press is a size press.
- a size press the paper is passed through a gap between two rotating rollers.
- the paper web passes through a so-called open sump between the two rolls.
- the gypsum application takes place via a doctor blade application.
- a doctor job can, for. B. via a roller blade, which predosed the gypsum on the rollers.
- the gypsum coating on the rolls can then be transferred from the rolls to the paper web. The application of a doctor blade thus enables an exact dosage of the plaster application.
- the press is a film press.
- the paper is thus carried out between two rolls, wherein on the two sides of the paper different dispersions can be applied.
- a film press has the further advantage that you can work at very high speeds.
- the paper is during the application the plaster dispersion less stressed, since the order of the dispersion is not dosed on the paper web, but on the applicator roll. It can thus also the number of breaks are reduced.
- the gypsum application by means of a coating unit or coater, z. B. with a CombiBlade® coating unit and VariBar® from Jagenberg.
- the paper is dried and in this case the calcium sulfate dihydrate is partially converted into calcium sulfate hemihydrate.
- the heating takes place so that the calcium sulfate dihydrate in stucco, d. H. a mixture of a large proportion of calcium sulfate hemihydrate and a small amount of calcium sulfate anhydrate. It is possible that virtually all of the calcium sulfate dihydrate is converted into stucco.
- this embodiment of the invention it is possible that the anyway provided in papermaking process of the
- Paper drying is used for the conversion into stucco.
- Dispersing agent is sodium polyacrylate and and the calcium sulfate dihydrate is dispersed while adjusting the pH.
- the pH generally plays a major role in papermaking, in particular there is a strong influence on most polymer additives as well as on the viscosity of the dispersion. It has been shown that by suitable adaptation of the pH, the viscosity can be reduced and thus a more efficient handling is made possible.
- the gypsum is ground or unground REA gypsum or ground natural gypsum or a mixture thereof.
- Gypsum core / paper should be deeper to a certain extent. Since the arrangement of gypsum crystals is more chaotic in natural gypsum than in REA gypsum, natural gypsum can be more stable here.
- the paper has a plurality of layers, of which at least one layer is gypsum-containing.
- the tube paper already contains gypsum in at least one layer.
- gypsum density of the finished paper can be achieved because gypsum is incorporated in both the paper layers and gypsum is applied to one or both surfaces of the paper.
- a layer which is located on a surface of the paper has a highest proportion of gypsum. This is based on the idea that the adhesive properties of the plaster, in particular within the surface of the paper to advantage.
- the paper has at least three layers, wherein the two surface layers of the paper have a higher proportion of gypsum than non-surface layers of the paper.
- a yellow cardboard is provided, which is provided on the visible side of a
- Gypsum core to be arranged.
- This yellow board has three layers of paper, of which only one layer, which is located on the underside of the board, was mixed with gypsum in the manufacture of cellulose pulp.
- the yellow cardboard is but by means of a
- the cardboard has a grammage of 160 g / m 2 to 190 g / m 2 .
- Gypsum board resulted in a significantly increased adhesion to the gypsum core.
- experiments have shown that gypsum application could greatly improve the adhesion properties of wallpapers to the yellow board.
- Plasterboard provided with the yellow cardboard can thus either be used as a plasterboard without additional wallpaper or optionally also be provided with a well-adhering wallpaper.
- a gray cardboard is produced which has three paper layers.
- all paper layers have been prepared in the same way, each with the
- Cellulose slurry gypsum was added.
- plaster is applied on both sides of the gray box by means of a size press. This results in a total of a particularly high gypsum content of the entire carton.
- the cardboard has a grammage of 170 g / m 2 , no dyes are used.
- the gray cardboard described above is placed on the back of the plasterboard.
- the gypsum filling in all three layers and the surface application results in a particularly intensive adhesion with the plaster of gypsum core, in particular it is possible that gypsum needles grow through several layers with gypsum needles grown out of the gypsum core and thus a particularly stable adhesion form.
- a gypsum coating with a speed of 250 meters per minute and a pressure of 0.9 bar is applied to a base paper with a grammage of about 155 g / m 2 by means of a Combi Blade Varibar.
- the weight is 12 g / m 2 .
- the dryer uses temperatures between 100 ° C and 160 ° C.
- a conventional paper with a grammage of 100 g / m 2 which is not originally intended for coating plasterboard, provided on both sides by means of a film press with a gypsum.
- coated paper adheres well to Gisplatten and thus can be used as a cost effective option to thicker papers or boxes.
Landscapes
- Laminated Bodies (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL11748608T PL2694730T3 (pl) | 2011-04-01 | 2011-08-04 | Sposób wytwarzania papieru zawierającego gips |
RS20180004A RS56700B1 (sr) | 2011-04-01 | 2011-08-04 | Postupak za proizvodnju papira koji sadrži gips |
NO11748608A NO2694730T3 (de) | 2011-04-01 | 2011-08-04 | |
EP11748608.4A EP2694730B1 (de) | 2011-04-01 | 2011-08-04 | Verfahren zur herstellung eines gips-haltigen papiers |
HRP20180021TT HRP20180021T1 (hr) | 2011-04-01 | 2018-01-05 | Postupak za proizvodnju papira koji sadrži gips |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2011/055088 WO2012130325A1 (de) | 2011-04-01 | 2011-04-01 | Karton mit optimierter gipskernhaftung |
PCT/EP2011/063463 WO2012130342A1 (de) | 2011-04-01 | 2011-08-04 | Verfahren zur herstellung eines gips-haltigen papiers |
EP11748608.4A EP2694730B1 (de) | 2011-04-01 | 2011-08-04 | Verfahren zur herstellung eines gips-haltigen papiers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2694730A1 true EP2694730A1 (de) | 2014-02-12 |
EP2694730B1 EP2694730B1 (de) | 2017-10-11 |
Family
ID=45626791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11748608.4A Active EP2694730B1 (de) | 2011-04-01 | 2011-08-04 | Verfahren zur herstellung eines gips-haltigen papiers |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2694730B1 (de) |
HR (1) | HRP20180021T1 (de) |
NO (1) | NO2694730T3 (de) |
PL (1) | PL2694730T3 (de) |
RS (1) | RS56700B1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114667215A (zh) * | 2019-11-05 | 2022-06-24 | 美国石膏公司 | 由高盐石膏制备石膏墙板的方法及相关产品 |
-
2011
- 2011-08-04 EP EP11748608.4A patent/EP2694730B1/de active Active
- 2011-08-04 PL PL11748608T patent/PL2694730T3/pl unknown
- 2011-08-04 RS RS20180004A patent/RS56700B1/sr unknown
- 2011-08-04 NO NO11748608A patent/NO2694730T3/no unknown
-
2018
- 2018-01-05 HR HRP20180021TT patent/HRP20180021T1/hr unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2012130342A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114667215A (zh) * | 2019-11-05 | 2022-06-24 | 美国石膏公司 | 由高盐石膏制备石膏墙板的方法及相关产品 |
Also Published As
Publication number | Publication date |
---|---|
EP2694730B1 (de) | 2017-10-11 |
NO2694730T3 (de) | 2018-03-10 |
RS56700B1 (sr) | 2018-03-30 |
PL2694730T3 (pl) | 2018-03-30 |
HRP20180021T1 (hr) | 2018-03-09 |
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