Low density paperboard articles

Details Low density paperboard articles Low density paperboard articles

2005-01-25

2005-01-25

Pyon, Harold (Department: 1772)

Stock material or miscellaneous articles

Hollow or container type article

Paper containing

C428S141000, C428S153000, C428S327000, C428S513000, C428S537500, C220S592170, C220S592160, C220S062120, C220S062200, C220S062220, C220S677000, C220S592200, C229S103110, C162S134000, C162S164100

Reexamination Certificate

active

06846529

ABSTRACT:
The invention provides a low density paperboard material for use in producing an insulated container, and is especially well-suited for making cups. The paperboard material comprises a paperboard web including wood fibers and expanded microspheres, and has a relatively low density ranging from about 6 to about 10 lb/3MSF/mil, a relatively high caliper ranging from about 24 to about 35 mil, and an internal bond strength of at least about 80×10−3ft-lbfpreferably at least 100×10−3ft-lbf. For applications such as cups the material is also coated on one or both sides with a barrier coating, preferably low density polyethylene, to limit liquid penetration into the web. The low density paperboard material of the invention is convertible for manufacture of containers, particularly cups, and the surface of the low density board may have a Sheffield smoothness of 300 SU or greater.

REFERENCES:
patent: 3293114 (1966-12-01), Kenaga et al.
patent: 3357322 (1967-12-01), Gill
patent: 3468467 (1969-09-01), Amberg
patent: 3556934 (1971-01-01), Meyer
patent: 3615972 (1971-10-01), Morehouse et al.
patent: 3779951 (1973-12-01), Streu
patent: 3785254 (1974-01-01), Mann
patent: 3819470 (1974-06-01), Shaw et al.
patent: 3941634 (1976-03-01), Nisser et al.
patent: 4051277 (1977-09-01), Wilkinson
patent: 4133688 (1979-01-01), Sack
patent: 4179546 (1979-12-01), Garner et al.
patent: 4233325 (1980-11-01), Slangan
patent: 4237171 (1980-12-01), Laage
patent: 4241125 (1980-12-01), Canning
patent: 4324753 (1982-04-01), Gill
patent: 4435344 (1984-03-01), Iioka
patent: 4451585 (1984-05-01), Andersson
patent: 4483889 (1984-11-01), Andersson
patent: 4548349 (1985-10-01), Tunberg
patent: 4581285 (1986-04-01), Mahefkey, Jr.
patent: 4617223 (1986-10-01), Hiscock
patent: 4619734 (1986-10-01), Andersson
patent: 4777930 (1988-10-01), Hartz
patent: 4781243 (1988-11-01), DeVogel
patent: 4836400 (1989-06-01), Chaffey et al.
patent: 4898752 (1990-02-01), Cavagna
patent: 4902722 (1990-02-01), Melber
patent: 4946737 (1990-08-01), Lindeman et al.
patent: 4982722 (1991-01-01), Wyatt
patent: 4988478 (1991-01-01), Held
patent: 5092485 (1992-03-01), Lee
patent: 5096650 (1992-03-01), Renna
patent: 5125996 (1992-06-01), Campbell et al.
patent: 5145107 (1992-09-01), Silver
patent: 5226585 (1993-07-01), Varano
patent: 5363982 (1994-11-01), Sadlier
patent: 5370814 (1994-12-01), Salyer
patent: 5424519 (1995-06-01), Salee
patent: 5454471 (1995-10-01), Norvell
patent: 5477917 (1995-12-01), Salyer
patent: 5478988 (1995-12-01), Hughes et al.
patent: 5490631 (1996-02-01), Iioka
patent: 5499460 (1996-03-01), Bryant
patent: 5514429 (1996-05-01), Kamihgaraguchi et al.
patent: 5520103 (1996-05-01), Zielinski et al.
patent: 5601744 (1997-02-01), Baldwin
patent: 5637389 (1997-06-01), Colvin et al.
patent: 5705242 (1998-01-01), Andersen
patent: 5759624 (1998-06-01), Neale et al.
patent: 5792398 (1998-08-01), Andersson
patent: 5800676 (1998-09-01), Koike et al.
patent: 5880435 (1999-03-01), Bostic
patent: 5884006 (1999-03-01), Frohlich et al.
patent: 5952068 (1999-09-01), Neale et al.
patent: 6133170 (2000-10-01), Suenaga et al.
patent: 6379497 (2002-04-01), Sandstrom et al.
patent: 6391943 (2002-05-01), Sarma et al.
patent: 2669767 (1997-10-01), None
Tappi/ May 1972, vol. 55, No. 5, p. 770-771.
Tappi/ Dec. 1973, vol. 56, No. 12, p. 158-160.
“The Use of Microspheres to Improve Paper Properties”, by Soderberg, Paper Technology, Aug. 1989, pp. VIII/17-VII/21.
“Xpancel®”, An Introduction, a publication from Expancel, Box 13000, S0-850 13 Sundsvall, Sweden.
“The Application of Microspheres for the Production of High Bulk Papers”, by M. Baumeister, Das Papier, vol. 26, No. 10A: 716-720 (1972).
“Microspheres find use as fiber replacement in low-density board”, by David O. Bowen, Pulp & Paper Nov. 1976, p. 126-127.
Expancel ® Expandable Microspheres in Paper and Board, by Mark Lunabba, KemaNord Plast AB, Sector Microspheres, Box 13000, S-850 13 Sundsvall, Sweden.
“Expandable Microspheres in Board”, World Pulp & Paper Technology, pp. 143-145.
“Foams on the Cutting Edge”, by Ray Erikson, Jan. 1999.

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