Process for treating and sizing paper substrates

Details Process for treating and sizing paper substrates Process for treating and sizing paper substrates

1995-01-27

1997-02-25

Chin, Peter

Paper making and fiber liberation

Processes and products

With coating after drying

1621646, 427475, 427482, 4273899, 427391, 427395, D21H 1916

Patent

active

056056052

ABSTRACT:
A process is disclosed for strengthening and sizing paper which comprises the step of applying a composition comprising (a) an isocyanate and (b) an isocyanate-reactive component comprising at least one polyol having an ethylene oxide content of at least 1%, wherein said composition does not contain water to the paper by means of an electrostatic spraying device having a linear orifice.

REFERENCES:
patent: 3484275 (1969-12-01), Lewicki
patent: 3492081 (1970-01-01), Morak
patent: 3930614 (1976-01-01), Krenkel
patent: 3996154 (1976-12-01), Johnson et al.
patent: 4505778 (1985-03-01), Robertson
patent: 4609686 (1986-09-01), Giordano, Jr. et al.
patent: 4801086 (1989-01-01), Noakes
patent: 4837057 (1989-06-01), Bartoszek-Loza et al.
patent: 4846407 (1989-07-01), Coffee et al.
patent: 4854506 (1989-08-01), Noakes et al.

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