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Process for manufacturing of formed products

  • US 4,377,440 A
  • Filed: 03/20/1981
  • Issued: 03/22/1983
  • Est. Priority Date: 05/25/1978
  • Status: Expired due to Term
First Claim
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1. A method of making a shaped, smooth-surfaced cellulosic paper or paper board article from an aqueous suspension of cellulose fibers, the fibers having been agitated in water so as to become separated from each other and swollen, comprising the steps of:

  • (a) preparing a homogeneous, plastically formable material by adding to the suspension sufficient hydrocolloid to bind substantially all of the water in the material to prevent it from bleeding out during subsequent shaping and to prevent the fibers from flocculating and by kneading the material, said material containing water in the range of from about 50 to about 90 percent, fibers in the range of from about 8 to about 49 percent, and hydrocolloid in the range of from about 1 to about 20 percent, by weight;

    (b) shaping the material into the desired shape by extrusion, injection molding, rolling, pressing or drawing; and

    (c) forming hydrogen bonds between the solids of the material by drying the shaped material.

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