Production of paper and cardboard

Details Production of paper and cardboard Production of paper and cardboard

1986-10-20

1988-06-07

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621818, 162183, D21H 358

Patent

active

047494441

ABSTRACT:
Paper and cardboard are produced by draining a paper stock by a method in which a stock having a consistency of from 2.5 to 5% by weight is used as a starting material, and (a) from 0.1 to 2% by weight of an activated bentonite are added and the stock consistency is then brought to 0.3-2% by weight by dilution with water, after which (b) from 0.01 to 0.1% by weight of a cationic polyelectrolyte having a charge density of not less than 4 meq/g of polyelectrolyte is added and distributed therein, and, after thorough mixing (c) from 0.003 to 0.3% by weight of a high molecular weight polymer based on acrylamide or methacrylamide is metered in and mixed with the paper stock, the percentages in each case being based on dry paper stock, and the resulting pulp is drained on a wire. The paper obtained is distinguished in particular by good printing properties in the offset printing process.

REFERENCES:
patent: 2795545 (1957-06-01), Gluesenkamp
patent: 3021257 (1962-02-01), Stauffenberg
patent: 3052595 (1962-09-01), Pye
patent: 4305781 (1981-12-01), Langley et al.
Casey, Pulp and Paper, vol. III, (1981), pp. 1602, 1603.
Abstract Bulletin of the Institute of Paper Chemistry, vol. 51, No. 11, May 1981, p. 1161, Summary No. 10862(T), Tappi, vol. 56, No. 3, Mar. 1973, pp. 83-86.

Affiliated with

Also associated with

Rating

Production of paper and cardboard does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Production of paper and cardboard, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of paper and cardboard will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-843014