EP0957212A2 - Plasterboard - Google Patents

Plasterboard Download PDF

Info

Publication number
EP0957212A2
EP0957212A2 EP99303741A EP99303741A EP0957212A2 EP 0957212 A2 EP0957212 A2 EP 0957212A2 EP 99303741 A EP99303741 A EP 99303741A EP 99303741 A EP99303741 A EP 99303741A EP 0957212 A2 EP0957212 A2 EP 0957212A2
Authority
EP
European Patent Office
Prior art keywords
gypsum
type
plasterboard
slurry
layer
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
Application number
EP99303741A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0957212A3 (en
EP0957212B1 (en
Inventor
Stuart Edward Dr. Horsley
David John Dr. Hazeldine
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.)
BPB Ltd
Original Assignee
BPB Ltd
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 BPB Ltd filed Critical BPB Ltd
Publication of EP0957212A2 publication Critical patent/EP0957212A2/en
Publication of EP0957212A3 publication Critical patent/EP0957212A3/en
Application granted granted Critical
Publication of EP0957212B1 publication Critical patent/EP0957212B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/043—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of plaster
    • 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
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0015—Machines or methods for applying the material to surfaces to form a permanent layer thereon on multilayered articles
    • 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
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard

Definitions

  • This invention relates to a multi layer plasterboard and finds particular application in plasterboards lined on one or both principal faces with paper or other liner.
  • Plasterboard is conventionally formed by preparing a slurry of gypsum plaster (calcium sulphate hemi-hydrate)in water.
  • the slurry is flowable, and may contain foam, aggregates and setting and other additives.
  • the slurry is poured onto a lower continuous belt and formed by an upper continuous belt into a continuous length of board.
  • the set board is cut and dried.
  • the slurry is poured onto a sheet of paper or other liner on the lower belt, and a further sheet of paper or other liner is brought onto the top of the slurry with the upper belt.
  • the wet set core develops a bond with the paper liner.
  • This wet bond is important in the board manufacturing process and it is particularly important that a good wet bond is formed by the time the board reaches the cutter. If an adequate wet bond has not developed by the cutter, the cut ends of the paper may be lifted off the wet set core during cutting. If the wet bond is inadequate when the board is in the dryer, after cutting, the paper may be blown off the board by the high velocity hot air stream, or it may start to roll around the transport rollers. This results in an unusable product and can lead to jams in the dryer.
  • Plasterboard may be made from gypsum from a number of sources, each of which has different chemical and physical properties.
  • gypsum include natural gypsum, desulphogypsum which is a by-product of the desulphurisation of flue gases from power stations or other burners and phosphogypsum which is a by-product of the manufacture of phosphoric acid by the sulphuric acid process.
  • Natural gypsum and desulphogypsum readily form a good wet bond with paper liner, typically in about one minute. Many phosphogypsums have been found to take longer to develop an adequate wet bond, typically around five minutes, and some may not develop an adequate wet bond at all.
  • a plasterboard comprising a layer of a first type of gypsum and a layer of a second type of gypsum.
  • the plasterboard is lined and the first type of gypsum forms a more rapid wet bond with the liner than the second type and is in contact with the liner.
  • the board is lined on both faces and layers of the first type of gypsum are either side of a layer of the second type of gypsum.
  • a method of making a gypsum plasterboard comprising forming a slurry of a first type of gypsum plaster; forming a slurry of a second type of gypsum plaster; and forming the slurries into a multi layer board.
  • a liner is applied to a surface formed by the slurry of the first type of gypsum plaster and the first type of gypsum forms a more rapid wet bond with the liner than does the second type of gypsum.
  • both surfaces of the board are provided by the slurry of the first type of gypsum plaster and a respective liner is applied to the surface of both slurries of the first type of gypsum plaster.
  • the first type of gypsum is natural gypsum or desulphogypsum and that the second type of gypsum is phosphogypsum or a mixture of phosphogypsum and at least one other gypsum.
  • the types of gypsum are not limited to these gypsums and may be mixtures of more than one gypsum.
  • the chemistry of the slurries is adjusted appropriately.
  • This latter parameter can be controlled by addition of known additives, for example a crystal modifier such as tartrate, to one or both slurries.
  • the types of gypsum may be chosen for other properties.
  • the different slurries may contain different additives or different proportions of the same additives.
  • additives include: microsilica to enhance the fire resistance of the board; starch to further improve adhesion between the gypsum and a liner; fibres such as glass fibres to strengthen the board; and water reducing agents.
  • the slurries may be treated differently; for example, the energy input during mixing can be varied between the slurries.
  • the slurries which will form the surface layers in the board are subjected to relatively high shear mixing compared to the or each other slurry, for example, to increase the strength of the surface layers and thus the strength and stiffness of the board.
  • the wet end of a board line shown in Figure 1 makes a plasterboard lined on the top and the bottom principal surfaces with paper liners.
  • the wet end of the board line shown in Figure 1 is of generally conventional construction and operation. It comprises a first mixer 10 to which phosphogypsum plaster, water and any other additives to be employed in the middle layer of the plasterboard, such as foam.
  • a second, smaller, mixer 12 receives desulphogypsum plaster, water and any additives to be employed in the surface layers of the plasterboard.
  • the first mixer is disposed immediately above a continuous belt 14. Which runs around a roller 16.
  • the bottom liner paper 18 is supplied to the upstream end of the belt 14 from a reel (not shown).
  • a bottom coating roll 22 is disposed across the run of the bottom liner paper 18.
  • the desulphogypsum plaster slurry is supplied to the bottom coating roller 22 from the second mixer 12 through a pipe 24.
  • a gauging roller 26 is disposed downstream of the first mixer; this roller defines the thickness of the plasterboard.
  • the top paper liner 28 runs around the gauging roller 26 from a reel (not shown).
  • An upper coating roller 30 is disposed across the run of the top liner paper 28, and is supplied with the desulphogypsum plaster slurry from the second mixer 12 through a pipe 32.
  • plaster, water and other additives are supplied continuously to the first and second mixers which mix them together to form the slurries for the middle layer and the outer surface layers respectively of the plasterboard.
  • the chemistry of the slurries is adjusted to ensure that a good bond is formed between the middle layer of phosphogypsum and the top and bottom layers of desulphogypsum in the set plasterboard.
  • the slurries can include conventional additives, such as foam, aggregates, setting and retarding agents and waterproofing agents.
  • the slurry which forms the or each outer layer can include a starch or other adhesion aid to further improve the bond between the outer layers and the liner.
  • a thin film of the desulphogypsum plaster slurry is applied to the upper surface of the paper.
  • the paper then passes onto the continuous belt 14, and the phosphogypsum plaster slurry is deposited on top of the desulphogypsum plaster slurry coating.
  • the top liner paper 28 is similarly coated with a thin layer of the desulphogypsum plaster slurry by the top coating roller 30, and is brought around the gauging roller 26 onto the upper surface of the phosphogypsum plaster slurry 34.
  • the gauging roller 26, together with the continuous belt and appropriate side structures forms the slurries into a continuous board, which sets as it moves down the board line.
  • the board made by the board line described above is shown in Figure 2. It comprises a middle layer 40 of phosphogypsum, outer layers 42, 42' of desulphogypsum and top 44 and bottom 46 paper liners.
  • the desulphogypsum outer layers 42, 42' form good wet and dry bonds with the paper liners, and the outer layers 42, 42' of desulphogypsum form a good bond with the middle layer 40 of phosphogypsum.
  • the outer layers will normally be up to 1 mm thick in a board of 12.5 mm thickness and in similar proportions in boards of other thicknesses; the weight ratio between the slurry of the first type of gypsum, making up in the preferred embodiment the middle layer of the board and the slurry of the second type of gypsum, making up in the preferred embodiment the outer layers of the board is preferably about 9:1.
  • the present invention provides a plasterboard in which different types of gypsum can be exploited for their varying properties in an efficient manner.
  • it provides a lined plasterboard predominantly of phosphogypsum which exhibits adequate wet bond formation with a liner.
EP99303741A 1998-05-13 1999-05-13 Plasterboard Expired - Lifetime EP0957212B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9810248A GB2337276B (en) 1998-05-13 1998-05-13 Plasterboard
GB9810248 1998-05-13

Publications (3)

Publication Number Publication Date
EP0957212A2 true EP0957212A2 (en) 1999-11-17
EP0957212A3 EP0957212A3 (en) 2001-09-05
EP0957212B1 EP0957212B1 (en) 2010-01-13

Family

ID=10831979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99303741A Expired - Lifetime EP0957212B1 (en) 1998-05-13 1999-05-13 Plasterboard

Country Status (6)

Country Link
EP (1) EP0957212B1 (es)
AT (1) ATE455215T1 (es)
CZ (1) CZ161899A3 (es)
DE (1) DE69941917D1 (es)
GB (1) GB2337276B (es)
PL (1) PL333046A1 (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1389157B1 (fr) * 2001-05-14 2007-04-04 Lafarge Platres Procede et dispositif pour la formation de couches denses dans une plaque de platre
EP1790790A2 (en) * 2005-11-28 2007-05-30 Johns Manville Gypsum board and process of manufacture
WO2015185251A1 (en) * 2014-06-05 2015-12-10 Knauf Gips Kg Method for producing a gypsum plasterboard and the gypsum plasterboard obtained thereby
JP2019147387A (ja) * 2019-04-17 2019-09-05 クナウフ ギプス カーゲー 石膏プラスターボードの製造方法およびそれにより得られる石膏プラスターボード
CN115043639A (zh) * 2022-06-15 2022-09-13 中建材创新科技研究院有限公司 一种高强度高耐火纸面石膏板及其制备方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111606668A (zh) * 2019-05-24 2020-09-01 北新集团建材股份有限公司 一种纸面石膏板及其制备方法
CN111606680B (zh) * 2019-07-30 2022-03-29 北新集团建材股份有限公司 一种净醛石膏板及其制备方法
CN111606681B (zh) * 2019-07-30 2022-03-29 北新集团建材股份有限公司 一种纸面石膏板及其制备方法
CN113789906A (zh) * 2021-09-26 2021-12-14 贵州建工集团第一建筑工程有限责任公司 一种钢框架内填磷石膏-混凝土组合墙的墙体及制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB741140A (en) * 1952-10-16 1955-11-30 British Plaster Board Holdings Improvements in and relating to the production of plaster board
EP0344430A2 (de) * 1988-06-03 1989-12-06 Rigips GmbH Verfahren zur Herstellung eines für die Produktion von Gipskartonplatten geeigneten Stuckgipses aus REA-Gips
EP0470914A1 (fr) * 1990-08-08 1992-02-12 Platres Lafarge Composition pour coeur de plaque de plâtre
EP0634255A1 (en) * 1993-07-12 1995-01-18 Bpb Industries Plc A method of manufacturing multilayer plasterboard and apparatus therefor
EP0729926A1 (en) * 1995-03-03 1996-09-04 Gyproc Benelux Process for producing gypsum building elements and gypsum building elements produced by said process
EP0811585A1 (en) * 1995-02-24 1997-12-10 Chichibu Onoda Cement Corporation Composite gypsum board

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE49483B1 (en) * 1979-05-30 1985-10-16 Bpb Industries Ltd Production of building board
US4327146A (en) * 1980-10-27 1982-04-27 National Gypsum Company High density interface gypsum board and method for making same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB741140A (en) * 1952-10-16 1955-11-30 British Plaster Board Holdings Improvements in and relating to the production of plaster board
EP0344430A2 (de) * 1988-06-03 1989-12-06 Rigips GmbH Verfahren zur Herstellung eines für die Produktion von Gipskartonplatten geeigneten Stuckgipses aus REA-Gips
EP0470914A1 (fr) * 1990-08-08 1992-02-12 Platres Lafarge Composition pour coeur de plaque de plâtre
EP0634255A1 (en) * 1993-07-12 1995-01-18 Bpb Industries Plc A method of manufacturing multilayer plasterboard and apparatus therefor
EP0811585A1 (en) * 1995-02-24 1997-12-10 Chichibu Onoda Cement Corporation Composite gypsum board
EP0729926A1 (en) * 1995-03-03 1996-09-04 Gyproc Benelux Process for producing gypsum building elements and gypsum building elements produced by said process

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1389157B1 (fr) * 2001-05-14 2007-04-04 Lafarge Platres Procede et dispositif pour la formation de couches denses dans une plaque de platre
US7470338B2 (en) 2001-05-14 2008-12-30 Lafarge Platres Process for forming dense layers in a gypsum slurry
EP1790790A2 (en) * 2005-11-28 2007-05-30 Johns Manville Gypsum board and process of manufacture
EP1790790A3 (en) * 2005-11-28 2010-06-09 Johns Manville Gypsum board and process of manufacture
JP2017525586A (ja) * 2014-06-05 2017-09-07 クナウフ ギプス カーゲー 石膏プラスターボードの製造方法およびそれにより得られる石膏プラスターボード
WO2015185143A1 (en) * 2014-06-05 2015-12-10 Knauf Gips Kg Method for producing a gypsum plasterboard and the gypsum plasterboard obtained thereby
CN106471194A (zh) * 2014-06-05 2017-03-01 可耐福石膏两合公司 用于生产石膏灰泥板的方法以及由此获得的石膏灰泥板
JP2017520427A (ja) * 2014-06-05 2017-07-27 クナウフ ギプス カーゲー 石膏プラスターボードの製造方法およびそれにより得られる石膏プラスターボード
WO2015185251A1 (en) * 2014-06-05 2015-12-10 Knauf Gips Kg Method for producing a gypsum plasterboard and the gypsum plasterboard obtained thereby
RU2681780C2 (ru) * 2014-06-05 2019-03-12 Кнауф Гипс Кг Способ изготовления гипсовой штукатурной плиты и гипсовая штукатурная плита, полученная таким образом
AU2014396515B2 (en) * 2014-06-05 2019-05-16 Knauf Gips Kg Method for producing a gypsum plasterboard and the gypsum plasterboard obtained thereby
RU2693688C2 (ru) * 2014-06-05 2019-07-04 Кнауф Гипс Кг Способ изготовления гипсовой штукатурной плиты и гипсовая штукатурная плита, полученная таким образом
CN106471194B (zh) * 2014-06-05 2020-08-11 可耐福石膏两合公司 用于生产石膏灰泥板的方法以及由此获得的石膏灰泥板
JP2019147387A (ja) * 2019-04-17 2019-09-05 クナウフ ギプス カーゲー 石膏プラスターボードの製造方法およびそれにより得られる石膏プラスターボード
CN115043639A (zh) * 2022-06-15 2022-09-13 中建材创新科技研究院有限公司 一种高强度高耐火纸面石膏板及其制备方法
CN115043639B (zh) * 2022-06-15 2024-03-19 中建材创新科技研究院有限公司 一种高强度高耐火纸面石膏板及其制备方法

Also Published As

Publication number Publication date
EP0957212A3 (en) 2001-09-05
GB9810248D0 (en) 1998-07-08
CZ161899A3 (cs) 1999-11-17
PL333046A1 (en) 1999-11-22
EP0957212B1 (en) 2010-01-13
ATE455215T1 (de) 2010-01-15
DE69941917D1 (de) 2010-03-04
GB2337276A (en) 1999-11-17
GB2337276B (en) 2002-05-08

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