Method for fiber loading a chemical compound

  • US 5,223,090 A
  • Filed: 12/11/1991
  • Issued: 06/29/1993
  • Est. Priority Date: 03/06/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for loading cellulosic fibers with calcium carbonate comprising:

  • (a) providing a cellulosic fibrous material comprising a plurality of elongated fibers having a fiber wall surrounding a hollow interior, said fibrous material having moisture present at a level sufficient to provide said cellulosic fibrous material in the form of dewatered crumb pulp;

    (b) adding a chemical selected from the group consisting of calcium oxide and calcium hydroxide to said pulp in a manner such that at least some of said chemical becomes associated with the water present in said pulp; and

    (c) contacting said cellulosic fibrous material with carbon dioxide while subjecting said cellulosic fibrous material to higher shear mixing so as to provide a cellulosic fibrous material having a substantial amount of calcium carbonate loaded within the hollow interior and within the fiber walls of the plurality of cellulosic fibers.

View all claims

    Thank you for your feedback