Method for producing nano artificial board

Method for producing nano artificial board

  • CN 1,586,843 B
  • Filed: 09/14/2004
  • Issued: 08/25/2010
  • Est. Priority Date: 09/14/2004
  • Status: Active Grant
First Claim
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1. the manufacture method of a nanometer wood-based plate, lignocellulose raw material or non-wood raw material are separated into the unit material of different shape through machining, drying, applying glue, assembly or mat formation, the hot-forming sheet material of making, applying glue be with the applying glue of modifying wood with nano material adhesive in the wood-based plate unit material, it is characterized in that unit material accounts for 82%~

  • 92%, the modifying wood with nano material adhesive accounts for 8%~

    18%, and wherein nano material is SiO 2, CaCO 3, TiO 2, ZnO, Al 2O 3In two or more combination of materials, the nano material total amount is 0.5%~

    12% of a modifying wood with nano material adhesive total amount;

    The prescription of adhesive is;

    The mol ratio of urea and formaldehyde is 1.2;

    560 kilograms in the formaldehyde of content 37%, 345 kilograms in the urea of content 100%, 10 kilograms of the polyvinyl alcohol of content 100%, liquid caustic soda is an amount of, and ammonium chloride is an amount of, nano material;

    SiO 23 kilograms, CaCO 34 kilograms, TiO 22 kilograms;

    Synthesis technique is;

    In stainless steel cauldron, drop into the formalin of full dose by prescription, start paddle, add 200 kilograms in first urea, and add the full dose polyvinyl alcohol, hydro-oxidation sodium adjust pH is 7.2-7.6, open return valve, open steam valve then and slowly evenly heat up, in 20 minutes, steadily rise to 72 ℃

    , the steam off valve allows reactant be warming up to 92 ±

    1 ℃

    automatically then;

    Be incubated 30 minutes, be cooled to 86 ±

    1 ℃

    , add ammonium chloride adjust pH to 4.5 and carry out polycondensation reaction, when being coated with-4 glasss of 20 ℃

    of viscosimetrics and reaching 20 seconds, add second batch of urea 105 kg and add NaOH and regulate pH value to 5.5, cooling and insulation were surveyed cloud point at 75 ℃

    of following 30-40 minutes, add 40 kilograms in the 3rd batch of urea at last, add the nano level SiO of full dose simultaneously 2, CaCO 3, and TiO 2, with NaOH the pH value is adjusted to 7.2, be cooled to 69 ±

    1 ℃

    , be incubated 20 minutes;

    When preparation nanometer glued board and nanometer core-board, closing volume valve after above-mentioned steps is finished transfers to 7.5 with the pH value, be cooled to 35 ℃

    after discharging;

    When preparation nanofiber plate and nanometer particieboard, in 40 kilograms in the 3rd batch of urea of above-mentioned adding, add the nano level SiO of full dose simultaneously 2, CaCO 3And TiO 2, with NaOH the pH value is adjusted to 7.2, is cooled to after 69 ±

    1 ℃

    , 20 minutes step of insulation finish, also to carry out vacuum dehydration, after solid content reaches 62 ±

    1%, stop dehydration, the pH value is transferred to 7.5, be cooled to 35 ℃

    after discharging.

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