Methods for producing colored glue-laminated bamboo timber articles

  • US 7,794,508 B2
  • Filed: 01/21/2009
  • Issued: 09/14/2010
  • Est. Priority Date: 05/05/2008
  • Status: Active Grant
First Claim
Patent Images

1. A method for producing a colored gluelam bamboo timber article, the method comprising:

  • providing a stalk of bamboo;

    splitting the bamboo stalk into strips;

    removing the tabasheer and bamboo rind from said bamboo strips;

    steaming the bamboo strips;

    dyeing the steamed bamboo strips under pressure;

    drying the dyed bamboo strips;

    planing the dried bamboo strips into a finished plane form; and

    ,laminating the finish plane form bamboo strips together with an adhesive to form a gluelam bamboo timber article;

    wherein the dyeing of the steamed bamboo strips comprises;

    placing the steamed bamboo strips into a dyeing tank;

    forming a first vacuum of about −

    0.01-−

    0.1 MPa in the tank;

    maintaining the first vacuum in the tank for a selected period of time;

    using the vacuum in the dyeing tank to suction dyeing liquor into the tank until the tank is filled;

    pressurizing the dyeing tank to a pressure of about 1.0-2.5 MPa;

    holding the pressure in the tank for a selected period of time;

    reducing the pressure in the dyeing tank to atmospheric pressure;

    pumping the dyeing liquor from the dyeing tank;

    forming a second vacuum of about −

    0.01-−

    0.1 MPa in the dyeing tank;

    maintaining the second vacuum in the tank for a selected period of time; and

    ,removing the dyed bamboo strips from the dyeing tank.

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