• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method for the production of particle boards by addition of a hydrophobing agent and a curable glue to wood based particles, shaping of the particle mass and subsequent curing of the glue by application of pressure and heat. The quality of the board is increased by keeping the hydrophobing agent heated above its melting temperature in the presence of the particles before the gluing.
    公开号:SU1658813A3
    申请号:SU833589085
    申请日:1983-05-05
    公开日:1991-06-23
    发明作者:Мэнссон Бьерн；Сирениус Курт；Сандин Биргер
    申请人:Каско Нобель Аб (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the woodworking industry and can be used in the manufacture of chipboard.
    The purpose of the invention is to increase the strength of plates by isolating urea from glue.
    PRI me R 1. Chipboards are made in a laboratory setup of wood particles with varying moisture content. A treatment liquid is prepared containing 17.6% by weight of dispersed paraffin wax with a melting point of 52 ° C, 39.0% by weight of dissolved urea and 43.4% by weight of water.
    In the first experiment 1 (the properties of the plates, depending on the moisture content of wood particles treated with a mixture of wax and urea, are given in Table 1) from wood
    particles prepare the standard, having a moisture content of 3%. The particles are directly mixed with 0.5% wax and glue, molded into a mat and pressed.
    In the second series of experiments (2 to 5) wood particles have a moisture content of 3, 6, 10 and 14%, respectively, they are treated with 2.7 kg of the processing liquid per 100 kg of wood particles (dry weight) and wood particles in experiments 3 through 5 is dried with hot air of 120 ° C to a moisture content of 3% and a final temperature of about 65 ° C.
    In all these experiments, wood particles are glued together after treatment with urea-formaldehyde resin in an amount of 9 wt.% (On the dry residue), molded into a mat and pressed.
    ABOUT
    ate
    00 00
    CJ

    with
    PRI mme R 2. The factory manufactured chipboard of normal size with a thickness of 16 mm.
    A.Dispersions, in which the ratio of wax and urea corresponds to the table. 2, sprayed at a rate of 1.8 kg per 100 kg dry weight of dried and unheated wood particles immediately before applying the adhesive at a rate of 12.5 to 100 by weight of urea formaldehyde glue, after which the mat is molded and pressed.
    B. Interrupt the above process and add 2 kg of various wax and urea dispersions to the particles before they are dried at about 50% moisture. After drying with hot flue gases to a final moisture content of about 2.5% at a final temperature of about 70 ° C
    they are glued, molded and pressed. The temperature of the incoming gases is 470 ° C, the temperature of the gases at the outlet is 135 ° C. The results are presented in table. 2, with test I relating to dispersion additives to dry particles immediately before sizing.
    test II refers to dispersion additives for wet particles before they are dried. Tests A refer to the known, and tests B refer to the invention.
    The results of the test plates are presented in Table. 2
    Thus, the invention makes it possible to increase the strength of the plates by isolating urea from glue.
    权利要求:
    Claims (1)
    [1]
    Claim method The production of particle boards, including drying wet wood particles, adding urea, wax and formaldehyde based glue to them, forming a carpet and then pressing it hot, characterized in that in order to increase the strength of the plates by isolating urea from glue , urea is added together with wax in the form of an aqueous dispersion containing 10–30 wt.% wax and 20–50 wt.% urea into moist wood particles, and wood particles are dried to a moisture content of 2–3% at 45–120 ° C before adding glue
    Table 1
    table 2
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    同族专利:
    公开号 | 公开日
    SE434931B|1984-08-27|
    NO161720C|1993-09-10|
    DD209773A5|1984-05-23|
    CA1203657A|1986-04-29|
    IT1205583B|1989-03-23|
    UA9901A|1996-09-30|
    NO161720B|1989-06-12|
    ATA166083A|1986-01-15|
    IT8348214D0|1983-05-04|
    DK198983A|1983-11-07|
    DK159057B|1990-08-27|
    CH659972A5|1987-03-13|
    GB2119702A|1983-11-23|
    GB2119702B|1986-07-23|
    NO831607L|1983-11-07|
    FI72280B|1987-01-30|
    BE896669A|1983-11-07|
    AU552100B2|1986-05-22|
    AU1414883A|1983-11-10|
    FR2526366B1|1987-04-24|
    FI831490A0|1983-05-02|
    GB8311799D0|1983-06-02|
    AT381060B|1986-08-25|
    FR2526366A1|1983-11-10|
    DE3316645C2|1991-05-16|
    DK198983D0|1983-05-04|
    DK159057C|1991-02-04|
    SE8202856L|1983-11-07|
    FI831490L|1983-11-07|
    DE3316645A1|1983-11-10|
    NZ204137A|1985-07-12|
    US4565662A|1986-01-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB1046246A|1962-06-07|1966-10-19|George Berthold Edward Schuele|Improvements in or relating to the utilisation of natural fibrous materials|
    US3297603A|1963-03-29|1967-01-10|Standard Oil Co|Drying oil composition and a process for improving particle board|
    US3899559A|1972-11-24|1975-08-12|Mac Millan Bloedel Research|Method of manufacturing waferboard|
    DE2553459A1|1975-11-28|1977-06-23|Basf Ag|PROCESS FOR MANUFACTURING WOOD-BASED MATERIALS|
    US4186242A|1976-03-08|1980-01-29|Georgia-Pacific Corporation|Preparation of a lignocellulosic composite|
    DE2740207B1|1977-09-07|1978-11-09|Basf Ag|Process for the production of wood-based materials with reduced subsequent release of formaldehyde|
    FI70385C|1978-04-28|1991-08-27|Casco Ab|SAETT ATT FRAMSTAELLA CELLULOSABASERADE SKIVMATERIAL OCH KOMPOSITION HAERFOER. AL OCH COMPOSITION HAERFOER|
    US4209433A|1978-12-19|1980-06-24|The United States Of America As Represented By The Secretary Of Agriculture|Method of bonding particle board and the like using polyisocyanate/phenolic adhesive|US4078593A|1977-01-17|1978-03-14|Earl Benitz|Slide mechanism for expandable bit screw holding screwdriver|
    DE3482658D1|1983-11-23|1990-08-09|Commw Scient Ind Res Org|METHOD FOR SHAPING A RECONSTRUCTED WOOD PRODUCT.|
    US5439735A|1992-02-04|1995-08-08|Jamison; Danny G.|Method for using scrap rubber; scrap synthetic and textile material to create particle board products with desirable thermal and acoustical insulation values|
    US5302330A|1993-06-08|1994-04-12|Harold Umansky|Method for the manufacture of waferboard|
    CA2100001A1|1993-06-25|1994-12-26|Timothy D. Hanna|Alkali metal salts as surface treatments for fiberboard|
    KR20070012759A|1998-06-17|2007-01-26|나일 화이버 펄프 앤드 페이퍼 인코포레이티드|Arundo donax chip and flake|
    US20030127763A1|2001-08-16|2003-07-10|Josef Stutz|Mechanically glued board of wood material|
    DE202005019646U1|2005-07-13|2006-03-16|Witte, Peter|Screwdriver for an internal profile screw|
    DE102013102227A1|2013-03-06|2014-09-11|W. Döllken & Co. GmbH|lipping|
    DE102013102351A1|2013-03-08|2014-09-11|W. Döllken & Co. GmbH|Process for tempering furniture panels|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE8202856A|SE434931B|1982-05-06|1982-05-06|PROCEDURE FOR MANUFACTURING CARTRIDGES|LV920279A| LV5110A3|1982-05-06|1992-12-09|Wood chips with a large production tolerance|
    LTRP729A| LT2209B|1982-05-06|1993-06-30|MANUFACTURING PROCESS FOR WOOD FLOWERS|
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