• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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  • 引用文献
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  • 优先权
    • 专利摘要:
    1376518 Manufacture of fibre sheets KARLSTADS MEKANISKA WERKSTAD AB 13 Oct 1972 [15 Oct 1971] 47235/72 Heading D2A In the manufacture of fibre sheets, e.g. paper, using an initial fibre-stock suspension containing B.O.D., (biochemical oxygen dem- and) substances, the suspension is divided into flows 5, 6, the flow 5 is conveyed to a first sheet forming stage 7 in which a first layer 8 is formed, the flow 6 is subjected to a washing process 9 in which the original B.O.D. substances containing suspension water is replaced by water substantially free of these substances, the washed flow 11 is conveyed to a second sheet forming stage 13 and optionally to a third sheet forming stages 14 where layers are formed which are added to the layer 8, and the water removed in the first sheet forming stage 7 and the original B.O.D. substances containing suspension water from the washing process 9 is recirculated to the initial fibre-stock suspension. Wood associated with water is ground to a pulp at 1; the pulp being then screened at 3 with the recirculated water entering at 4. The water from the second and third forming stages 13, 14 and from a pressing stage 17 is recirculated to the washing process at 10. The three layered web 18 has the layer 8 as the centre layer and passes from the pressing stage 17 to a dryer (not shown). Clean water is supplied at 19 for cleaning, the press felts. Chemical wood-pulp may be added at 20. The layer 8 may be dewatered in forming stage 7 to a value such that its water content does not exceed the total water content of the three layered web 18, to prevent B.O.D. substances reaching the outer surfaces of the web during pressing. A web of more than three layers may be produced and this may be of cardboard or fibreboard. A paper-making machine for forming a three-layered web, Fig. 2 (not shown), has three successively disposed sheet forming double wire sections and a press section, the first forming section having a pervious forming suction roll, and the other two forming sections have impervious forming rolls which avoid dewatering through the first layer containing B.O.D. substances. The headboxes for the second and third forming sections are directed to one side of the previously formed layer or layers so as not to disturb these.
    公开号:SU722496A3
    申请号:SU721835681
    申请日:1972-10-13
    公开日:1980-03-15
    发明作者:Стуре Эрикссон Эрик
    申请人:Актиеболагет Карлштадс Меканиска Веркштад (Фирма)；
    IPC主号:
    专利说明:

    one
    This invention relates to papermaking technology and can be used in the pulp and paper industry.
    Methods are known for producing multi-layered fibrous roll materials by grinding wood pulp, sorting and molding a web.
    The purpose of the invention is to improve the quality of the cover layers of the web.
    This is achieved by the fact that according to the proposed method, part of the fiber suspension after sorting is fed to the molding of one layer of the web, and the rest is washed to remove biochemically oxygen-consuming substances and the surface layers of the web are fed to the molding.
    The diagram shows an embodiment of the method, with thin lines showing water, fresh and circulating and double lines - fibrous suspension.
    the pulp obtained on the grinding equipment 1 is fed to sorting 2, from where part of it, containing biochemically oxygen-consuming substances.
    is fed to the first stage 3 of the molding, and thus the first web layer is obtained. The remaining part of the pulp after sorting 2 is subjected to washing 4, as a result of which biochemically oxygen-consuming substances are removed from it, and fed to the second 5 and third 6 stages of web forming. These layers are coverslips with respect to the first layer obtained in stage 3, and due to the absence of biochemically oxygen-consuming substances in the cover layers, they do not turn yellow and retain high optical properties. The multi-layered web formed in stages 3, 5 and 6 of the molding is fed to the press section 7. The circulating water after the first molding stage is again fed to the grading, and the circulating water from the second and third molding stage, as well as after the pressing stage, is fed due to which the total water consumption is reduced. Thus, fresh water is required only for grinding wood and for washing the cloth in the press section.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    Method for the production of multilayer fibrous roll materials by grinding wood pulp, sorting and shaping the web, which is the fact that, in order to improve the quality of the coating
    the layers of the web, the fiber suspension after sorting serves to form one layer of the web, and the rest is washed to remove biochemically oxygen-consuming substances and is fed to the molding of 1 hem blood layer together with the first layer.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU722496A3|1980-03-15|Method of producing multilayer fibrous rolled materials
    FI75200B|1988-01-29|FOERFARANDE VID PAPPERSFRAMSTAELLNINGSPROCESS FOER FOERBAETTRING AV EGENSKAPER HOS PAPPERET, SAERSKILT DESS RETENTION.
    TWI234598B|2005-06-21|Forming fabric with twinned top wefts and an extra layer of middle wefts
    Bajpai2015|Basic overview of pulp and paper manufacturing process
    US2098733A|1937-11-09|Plyboard
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    US2881669A|1959-04-14|Paper or board product
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    US6254728B1|2001-07-03|Method and machine for manufacturing a fibrous pulp web
    EP2640890B1|2015-09-23|Device and method for producing a material web
    GB1589800A|1981-05-20|Tissue paper-making machine
    FI71377B|1986-09-09|FOERFARANDE FOER FRAMSTAELLNING AV FLERSKIKTSKARTONG
    FI75383C|1988-06-09|FOERFARANDE FOER FRAMSTAELLNING AV FLERSKIKTSKARTONG.
    DE19526205A1|1997-01-30|Multilayer paper or board-making process and appts. - uses stocks having high and low proportion of fines, latter being used to form inner and former to form outer layers of web.
    US1534620A|1925-04-21|Apparatus for separating liquids from solid bodies mixed or suspended therein
    US1163251A|1915-12-07|Paper-making.
    Haunreiter1997|200th Anniversary of the paper machine
    US253403A|1882-02-07|Shiee
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    DE102010029582A1|2011-12-01|Wet end of a machine for the production of fibrous webs and use of such a wet end
    SU720088A1|1980-03-05|Net assembly of paper-making machine
    GB458759A|1936-12-21|Improvements in or relating to paper making machines
    DE102019125929A1|2021-04-01|Machine and method for producing a decorative base paper web
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    AT519242B1|2018-05-15|METHOD FOR PRODUCING A MULTILAYER FIBROUS WEB WITH WHITE COVERING
    同族专利:
    公开号 | 公开日
    NO140939B|1979-09-03|
    JPS5122962B2|1976-07-14|
    DE2250421A1|1973-05-03|
    FR2157459A5|1973-06-01|
    JPS48103804A|1973-12-26|
    CA971789A|1975-07-29|
    AT326996B|1976-01-12|
    SE362672B|1973-12-17|
    ATA879872A|1975-03-15|
    IT975214B|1974-07-20|
    NO140939C|1979-12-12|
    GB1376518A|1974-12-04|
    US3821073A|1974-06-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    SE7317565L|1973-12-28|1975-06-30|Selander Stig Daniel|
    SE7704737L|1977-04-25|1978-10-26|S D Selander|WAY TO PUT ONE OR SEVERAL SURFACE LAYERS ON THE GROUND MASS PANEL IN THE MANUFACTURE OF FIBER SHEETS ON VATA ROAD|
    US4221634A|1979-02-21|1980-09-09|Federal Paper Board Company, Inc.|Method of treating papermaking white water|
    US4525278A|1979-02-21|1985-06-25|Federal Paper Board Company, Inc.|Method of treating chemical process water|
    USRE31507E|1979-02-21|1984-01-24|Federal Paper Board Company, Inc.|Method of treating papermaking white water|
    SE421939B|1980-06-05|1982-02-08|Karlstad Mekaniska Ab|BACKGROUND MANAGEMENT PROCEDURE|
    SE428811B|1981-12-03|1983-07-25|Karlstad Mekaniska Ab|PROCEDURE AND DEVICE FOR PREPARING A MULTILAYER PAPER COAT|
    SE510341C2|1997-08-19|1999-05-17|Sca Research Ab|Method and apparatus for forming a multilayer web|
    US6423183B1|1997-12-24|2002-07-23|Kimberly-Clark Worldwide, Inc.|Paper products and a method for applying a dye to cellulosic fibers|
    US6379498B1|2000-02-28|2002-04-30|Kimberly-Clark Worldwide, Inc.|Method for adding an adsorbable chemical additive to pulp during the pulp processing and products made by said method|
    US6582560B2|2001-03-07|2003-06-24|Kimberly-Clark Worldwide, Inc.|Method for using water insoluble chemical additives with pulp and products made by said method|
    US7749356B2|2001-03-07|2010-07-06|Kimberly-Clark Worldwide, Inc.|Method for using water insoluble chemical additives with pulp and products made by said method|
    TW593838B|2001-06-11|2004-06-21|Sca Hygiene Prod Ab|A patterned paper and a method for manufacturing such|
    CN105332311B|2015-11-26|2017-12-15|黄蒋元|Papermaking to zero discharge standard production line|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE13117/71A|SE362672B|1971-10-15|1971-10-15|
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