Differential density cellulosic structure and process for making

Details Differential density cellulosic structure and process for making Differential density cellulosic structure and process for making

1997-06-06

1999-08-10

Fortuna, Jose

Paper making and fiber liberation

Processes and products

Non-uniform, irregular or configured web or sheet

162205, 162207, 162117, 162111, 34414, 34422, D21H 1100

Patent

active

059353813

ABSTRACT:
A differential density single lamina web of cellulosic fibers comprises at least two pluralities of micro-regions disposed in a non-random and repeating pattern: a first plurality of high density regions and a second plurality of low density regions. The high density regions comprise cellulosic fibers comprising fluid latent indigenous polymers (FLIP), such as hemicelluloses and lignin. The fibers of the high-density regions are FLIP-bonded, i.e., bonded together by a process of softening, flowing and immobilization of the FLIP between the cellulosic fibers of the high density regions. The process for making the web comprises the steps of providing a plurality of papermaking fibers comprising FLIP; providing a macroscopically monoplanar papermaking belt having a web-facing surface and deflection conduits; depositing the plurality of the cellulosic fibers on the papermaking belt to form a web; heating the web to a temperature sufficient to cause the FLIP contained in a first portion associated with the web-facing surface of the belt to soften; impressing the web-side surface of the belt into the web; immobilizing the flowable FLIP and creating FLIP-bonds between the fibers comprising the first portion of the web.

REFERENCES:
patent: 3812000 (1974-05-01), Salvucci, Jr. et al.
patent: 3821068 (1974-06-01), Shaw
patent: 4112586 (1978-09-01), Lehtinen
patent: 4347100 (1982-08-01), Brucato
patent: 4506456 (1985-03-01), Lehtinen
patent: 4506457 (1985-03-01), Lehtinen
patent: 4507173 (1985-03-01), Klowak et al.
patent: 4514345 (1985-04-01), Johnson et al.
patent: 4528239 (1985-07-01), Trokhan
patent: 4529480 (1985-07-01), Trokhan
patent: 4622758 (1986-11-01), Lehtinen et al.
patent: 4637859 (1987-01-01), Trokhan
patent: 4899461 (1990-02-01), Lehtinen
patent: 4932139 (1990-06-01), Lehtinen
patent: 4958444 (1990-09-01), Rautakorpi et al.
patent: 5277761 (1994-01-01), Phan
patent: 5334289 (1994-08-01), Trokhan et al.
patent: 5549790 (1996-08-01), Van Phan
patent: 5580423 (1996-12-01), Ampulski
patent: 5594997 (1997-01-01), Lehtinen
patent: 5709774 (1998-01-01), Naieni
patent: 5795440 (1998-08-01), Ampulski et al.
patent: 5814190 (1998-09-01), Van Phan

Affiliated with

Also associated with

Rating

Differential density cellulosic structure and process for making does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Differential density cellulosic structure and process for making, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential density cellulosic structure and process for making will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1116392