Water resistant paperboard and method of making same

Details Water resistant paperboard and method of making same Water resistant paperboard and method of making same

1990-02-26

1991-08-13

Elkins, Gary E.

Envelopes, wrappers, and paperboard boxes

Paperboard box

Box material includes a coating or a nonpaperboard...

162158, 129 35R, 428511, B65D 562

Patent

active

050389971

ABSTRACT:
A paper sheet of paperboard, such as boxboard, cardboard and the like has one surface coated with a surfactant to prevent, or at least retard the penetration of moisture through the thickness of the paperboard to the other surface thereof. A method of making a paper sheet or paperboard which has an improved resistance to or retards the penetration of moisture through the thickness of the paperboard comprises the sequential steps of applying a thin coating of a surfactant to one surface of the paperboard, and immediately drying the coated surfactant on the paperboard.

REFERENCES:
patent: 2683087 (1954-07-01), Reynolds, Jr.
patent: 2957797 (1960-10-01), Nakayama
patent: 3096228 (1963-07-01), Day et al.
patent: 3485575 (1969-12-01), Christian
patent: 3936339 (1976-02-01), Lock et al.

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