Low viscosity kraft fiber having reduced yellowing properties and method of making and using same

Low viscosity kraft fiber having reduced yellowing properties and method of making and using same

  • CN 104,302,831 A
  • Filed: 01/11/2013
  • Published: 01/21/2015
  • Est. Priority Date: 01/12/2012
  • Status: Active Application
First Claim
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1. make a method for modified kraft paper pulp, it comprises:

  • By the Kappa number of softwood cellulose pulp cooking to about 17 ~ about 21;

    By described cellulose pulp oxygen delignification to the Kappa number being less than 8;

    Multistage bleaching technique is used cellulose kraft pulp to be bleached;

    And during at least one stage of described multistage bleaching technique, be oxidized described kraft pulp in acid condition with peroxide and catalyst, wherein said multistage bleaching technique be included in described oxidation stage after at least one bleaching stage.

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