Method for making a nonwoven web

Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C264S103000, C264S211140, C264S211170

Reexamination Certificate

active

06846450

ABSTRACT:
Melt blown or spun bond nonwoven webs are formed by flowing fiber-forming material through a die cavity having a substantially uniform residence time and then through a plurality of orifices to form filaments, using air or other fluid to attenuate the filaments into fibers and collecting the attenuated fibers as a nonwoven web. Each die orifice receives a fiber-forming material stream having a similar thermal history. The physical or chemical properties of the nonwoven web fibers such as their average molecular weight and polydispersity can be made more uniform. Wide nonwoven webs can be formed by arranging a plurality of such die cavities in a side-by-side relationship. Thicker or multilayered nonwoven webs can be formed by arranging a plurality of such die cavities atop one another.

REFERENCES:
patent: 3016599 (1962-01-01), Perry, Jr.
patent: 3498230 (1970-03-01), Schippers
patent: 3571679 (1971-03-01), Van Turnhout
patent: 3971373 (1976-07-01), Braun
patent: 4111531 (1978-09-01), Lavelle et al.
patent: 4215682 (1980-08-01), Kubik et al.
patent: 4285655 (1981-08-01), Matsubara
patent: 4818463 (1989-04-01), Buehning
patent: 4889476 (1989-12-01), Buehning
patent: 4988560 (1991-01-01), Meyer et al.
patent: 4995333 (1991-02-01), Keller et al.
patent: 5124111 (1992-06-01), Keller et al.
patent: 5236641 (1993-08-01), Allen et al.
patent: 5248247 (1993-09-01), Rubhausen et al.
patent: 5260003 (1993-11-01), Nyssen et al.
patent: 5354529 (1994-10-01), Berger et al.
patent: 5582907 (1996-12-01), Pall
patent: 5618566 (1997-04-01), Allen et al.
patent: 5637331 (1997-06-01), Lenk et al.
patent: 5648041 (1997-07-01), Rodgers et al.
patent: 5728219 (1998-03-01), Allen et al.
patent: 5728407 (1998-03-01), Matsui
patent: 5740963 (1998-04-01), Riney et al.
patent: 5863565 (1999-01-01), Rossillon et al.
patent: 5891482 (1999-04-01), Choi
patent: 5902531 (1999-05-01), Berger et al.
patent: 5951942 (1999-09-01), Rossillon et al.
patent: 5993943 (1999-11-01), Bodaghi et al.
patent: 6057256 (2000-05-01), Krueger et al.
patent: 6182732 (2001-02-01), Allen
patent: 6210141 (2001-04-01), Allen
patent: 6220843 (2001-04-01), Allen
patent: 6296463 (2001-10-01), Allen
patent: 6336801 (2002-01-01), Fish et al.
patent: 29 33 025 (1981-03-01), None
patent: 417 815 (1991-03-01), None
patent: 0822282 (1998-02-01), None
patent: 9-109229 (1997-04-01), None
patent: WO 9932692 (1999-07-01), None
Ito, “Design of Coat-Hanger Die Considering Residence Time,”Japan Plastics, 28(2):43-47 (1977).
Wen, S. H. et al., “Extrusion Die Design For Multiple Stripes,”Polymer Engineering and Science, 35(9):759-767 (1995).
Winter et al., “Design for Dies for the Extrusion of Sheets and Annular Parisons: The Distribution Problem,” ANTEC '84 Conference Proceedings, pp. 49-51, 1984.

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

Method for making a nonwoven web does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for making a nonwoven web, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making a nonwoven web will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3380165

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