Polymer reinforced paper having improved cross-direction tear

Paper making and fiber liberation – Processes and products – Non-uniform – irregular or configured web or sheet

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

162135, 162158, 1621641, 1621681, 162169, 156183, 264282, 264283, 427271, 427276, 427277, 427288, 427356, 427391, 427395, D21H 1960

Patent

active

056907877

ABSTRACT:
A method of forming a polymer-reinforced paper which includes preparing an aqueous suspension of fibers, at least about 50 percent, by dry weight, of which are cellulosic fibers; distributing the suspension on a forming wire; removing water from the distributed suspension to form a paper; and treating the paper thus formed with a polymer-reinforcing medium which contains a bulking agent to give the polymer-reinforced paper. The treatment of the paper is adapted to provide in the polymer-reinforced paper from about 15 to about 70 percent, by weight, of bulking agent, based on the dry weight of the cellulosic fibers in the paper. Alternatively, the bulking agent can be added to a polymer-reinforced paper after it has been formed. In certain embodiments, the bulking agent is a polyhydric alcohol. In other embodiments, the bulking agent is a polyethylene glycol having a molecular weight in the range of from about 100 to about 1,500. The polymer-reinforced paper has improved cross-direction tear when tested with an Elmendorf Tear Tester in accordance with TAPPI Method T414, particularly when the paper has a moisture content no greater than about 5 percent by weight.

REFERENCES:
patent: 1913017 (1933-06-01), Arpin
patent: 2249118 (1941-07-01), De Witt
patent: 2785995 (1957-03-01), Kress
patent: 3019134 (1962-01-01), Hechtman et al.
patent: 3499823 (1970-03-01), Croon et al.
patent: 3674632 (1972-07-01), Wennergren
patent: 4303471 (1981-12-01), Laursen
patent: 4341597 (1982-07-01), Andersson et al.
patent: 4455350 (1984-06-01), Berbeco
patent: 4481076 (1984-11-01), Herrick
patent: 4481077 (1984-11-01), Herrick
patent: 4536432 (1985-08-01), Holtman
patent: 4590955 (1986-05-01), Dixit
patent: 4710422 (1987-12-01), Fredenucci
patent: 4833011 (1989-05-01), Horimoto
patent: 4849131 (1989-07-01), Sweeney
patent: 4853086 (1989-08-01), Graef
patent: 5160484 (1992-11-01), Nikoloff
patent: 5223093 (1993-06-01), Klowak
patent: 5223095 (1993-06-01), Kinsley, Jr.
Database WPI, Section Ch, Derwent Publications Ltd., London, GB; Class A25, AN 70-1626OR & JP-B-45 005 722 (Seitetsu Kagaku Co. Ltd.) See abstract.
K. W. Britt, "Handbook of Pulp and Paper Tech.," 2nd Ed, Van Nostrand Rheinhold Co., 1970, pp.548-549, pp.666-667, pp.672-674.
"TAPPI", Internal Tearing Resistance of Paper (Elmendorf-type method), pp. 1-6.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Polymer reinforced paper having improved cross-direction tear does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polymer reinforced paper having improved cross-direction tear, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymer reinforced paper having improved cross-direction tear will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2103530

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.