Method of stabilizing felted cellulosic sheet material with an a

Details Method of stabilizing felted cellulosic sheet material with an a Method of stabilizing felted cellulosic sheet material with an a

1981-09-08

1983-08-30

Lusignan, Michael R.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

162 80, 1621811, D21C 300

Patent

active

044018100

ABSTRACT:
Felted cellulosic sheet material is treated with a solution of an alkali al borohydride in order to improve and stabilize its strength and brightness. A subsequent wash with deionized water or preferably an aqueous solution containing an alkaline earth metal hydroxide, carbonate, or bicarbonate further improves the stability of the brightness and strength of felted cellulosic sheet material. The washing of cellulosic sheet material is most efficiently accomplished in an apparatus providing a means to add a metered amount of alkaline earth metal hydroxide, carbonate, or bicarbonate to a continuously flowing stream of wash medium.

REFERENCES:
patent: 3081265 (1963-03-01), Burr
patent: 3318657 (1967-05-01), Wade

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