Method of making paper having improved tearing strength

Details Method of making paper having improved tearing strength Method of making paper having improved tearing strength

1984-06-15

1986-09-02

Chin, Peter

Paper making and fiber liberation

Processes and products

Plural fiber containing

162149, 1621681, 162169, 162175, 162182, 162183, D21H 512

Patent

active

046094326

ABSTRACT:
The tearing strength of paper is improved by providing a furnish in which the fiber content is predominantly refined fiber with a minor amount, preferably 2 to 10 wt. %, of added unrefined fiber having incorporated therein a heat activatable bonding agent, particularly starch. The bonding agent adheres to and coats the added fiber without chemically reacting with the fiber. A cationic material, particularly polyethyleneimine, is premixed with the raw starch to cause it to adhere to the added fiber. During heat drying of the formed paper the starch is gelatinized to effect enhanced bonding of the added fiber.

REFERENCES:
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patent: 3325346 (1967-06-01), Osborg
patent: 3436305 (1969-04-01), Maher
patent: 4210488 (1980-07-01), Reuss et al.
patent: 4269657 (1981-05-01), Gomez et al.
patent: 4309247 (1982-01-01), Hou et al.
Gupta, M. K., TAPPI, Mar. 1980, vol. 63, No. 3, pp. 29-31.

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