Bleaching and coating a paper web with peroxide and starch

Details Bleaching and coating a paper web with peroxide and starch Bleaching and coating a paper web with peroxide and starch

1994-10-24

1997-06-10

Alvo, Steven

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162175, 1621811, 162184, D21C 916, D21H 2132

Patent

active

056371934

ABSTRACT:
A method for bleaching a paper web with peroxide and to a paper surface treatment mixture intended for such a method. According to the invention, peroxide is introduced onto a moving paper web as part of the said mixture, which in addition to the peroxide contains another active component, such as a bonding agent or a surface coating, to be introduced onto the web. The bonding agent may be made up of starch and a surface coating pigment, such as calcium carbonate, kaolin or talc. Peroxide is added to these so that its amount on each side of the web to be bleached will be approx. 0.08-1.0 g/m.sup.2.

REFERENCES:
patent: 2613579 (1952-10-01), McEwen et al.
patent: 3211564 (1965-10-01), Lauterbach
patent: 3467575 (1969-09-01), Wayman et al.
patent: 3475215 (1969-10-01), Maurer
patent: 4435248 (1984-03-01), Arakawa

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