Method of making ply-separable paper

Details Method of making ply-separable paper Method of making ply-separable paper

1979-05-24

1980-09-30

Smith, William F.

Paper making and fiber liberation

Processes and products

Non-uniform, irregular or configured web or sheet

162132, 162130, D21H 524, B21F 112

Patent

active

042253829

ABSTRACT:
An improved process to produce a novel tissue which becomes ply-separable during the papermaking process. In a first embodiment of the invention a two-layered stratified web is formed, having a first layer comprised of a relatively low consistency slurry of long papermaking fibers and a second layer comprised of a high consistency slurry of relatively short papermaking fibers. In a second embodiment of the invention, a stratified web having three layers is formed, comprised of well-bonded layers separated by an interior barrier layer. These improved tissue products need not be creped from a creping roll with a doctor blade in order to exhibit ply-separability, and they may be creped in a single step to form a finished product which is creped all the way through.

REFERENCES:
patent: 1606428 (1926-11-01), Kirschbraun
patent: 3994771 (1976-11-01), Morgan et al.

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