Solvent-distributed, powdered rubber in beater saturated sheets

Details Solvent-distributed, powdered rubber in beater saturated sheets Solvent-distributed, powdered rubber in beater saturated sheets

1975-04-03

1977-01-11

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Mineral fiber

162169, 162184, D21F 1100

Patent

active

040025276

ABSTRACT:
A beater saturation process wherein a fine powdered chlorinated natural rubber is added to papermaking fibers suspended in water. A synthetic binder in latex form is precipitated onto the fibers carrying with it the fine powdered rubber particles. This slurry is formed into a dry sheet and treated with a solvent which partially dissolves or substantially swells the chlorinated natural rubber but which does not so dissolve the synthetic latex binder. The chlorinated natural rubber is thus further distributed and smeared throughout the sheet by the solvent. The solvent is removed and a stiff strong sheet results.

REFERENCES:
patent: 1904087 (1933-04-01), Schacht
patent: 3102837 (1963-09-01), Griswold
patent: 3344017 (1907-09-01), Lesniak
Casey, "Pulp & Paper," vol. II, (1960), p. 947.
Hawley, "The Condensed Chem. Dictionary," 8th Ed., (1971), p. 766.

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