Methods for improving the tear strength of mats

Details Methods for improving the tear strength of mats Methods for improving the tear strength of mats

2011-04-19

2011-04-19

Daniels, Matthew J (Department: 1791)

Paper making and fiber liberation

Processes and products

Mineral fiber

C162S152000, C162S158000, C162S164100, C162S168100, C162S185000

Reexamination Certificate

active

07927459

ABSTRACT:
Methods for improving the tear strength in non-woven chopped strand mats during the manufacturing process of the mats are provided. In particular, the tear strength of the mat can be improved as the mat is being formed in response to current manufacturing conditions by the addition of a water soluble polyol, such as polyvinyl alcohol, or a cationic dispersant to the binder seal pit. Alternatively, a cationic dispersant may be added to the white water chest to improve the tear strength of the chopped strand mat. The addition of polyvinyl alcohol or a cationic dispersant to the binder seal pit results in an immediate or nearly immediate improvement of the tear strength of the chopped strand mat. Both the polyvinyl alcohol and the cationic dispersant can be utilized to improve the tear strength of a chopped strand mat regardless of the type of binder or components in the white water.

REFERENCES:
patent: 4147833 (1979-04-01), Eilerman et al.
patent: 4178203 (1979-12-01), Chakrabarti
patent: 4190566 (1980-02-01), Noll et al.
patent: 4255485 (1981-03-01), Yau
patent: 4258098 (1981-03-01), Bondoc
patent: 4271229 (1981-06-01), Temple
patent: 4359546 (1982-11-01), Bershas
patent: 4394475 (1983-07-01), Temple et al.
patent: 4461804 (1984-07-01), Motsinger et al.
patent: 4526914 (1985-07-01), Dolin
patent: 4536446 (1985-08-01), Hsu et al.
patent: 4542065 (1985-09-01), Gaa
patent: 4542068 (1985-09-01), Whichard
patent: 4546880 (1985-10-01), Reese
patent: 4567228 (1986-01-01), Gaa et al.
patent: 4582873 (1986-04-01), Gaa et al.
patent: 4592956 (1986-06-01), Gaa et al.
patent: 4681658 (1987-07-01), Hsu et al.
patent: 4681802 (1987-07-01), Gaa et al.
patent: 4745028 (1988-05-01), Das et al.
patent: 4762750 (1988-08-01), Girgis et al.
patent: 4795678 (1989-01-01), Girgis
patent: 4810576 (1989-03-01), Gaa et al.
patent: 5041494 (1991-08-01), Franke et al.
patent: 5445878 (1995-08-01), Mirous
patent: 5554686 (1996-09-01), Frisch, Jr. et al.
patent: 5646207 (1997-07-01), Schell
patent: 5667058 (1997-09-01), Bonnet
patent: 5773146 (1998-06-01), Lawton et al.
patent: 5804313 (1998-09-01), Schell
patent: 5851933 (1998-12-01), Swartz
patent: 6034006 (2000-03-01), Arpin et al.
patent: 6179962 (2001-01-01), Brady
patent: 6384116 (2002-05-01), Chan et al.
patent: 6544911 (2003-04-01), Peng et al.
patent: 6642299 (2003-11-01), Wertz et al.
patent: 6706147 (2004-03-01), Peng et al.
patent: 6770169 (2004-08-01), Wallace
patent: 6817152 (2004-11-01), Peng et al.
patent: 6864340 (2005-03-01), Levandoski et al.
patent: 2002/0144522 (2002-10-01), Messick et al.
patent: 2002/0198301 (2002-12-01), Campbell et al.
patent: 2005/0136237 (2005-06-01), Beerda et al.
patent: 2005/0276960 (2005-12-01), Lee et al.
patent: 2005/0282451 (2005-12-01), Canfield et al.
patent: 2006/0113050 (2006-06-01), Droux et al.
patent: 2006/0204737 (2006-09-01), Ziegler
patent: 2007/0006775 (2007-01-01), Helwig et al.
patent: 2007/0039703 (2007-02-01), Lee et al.
patent: 2007/0059506 (2007-03-01), Hager et al.
patent: 1584724 (2005-10-01), None
patent: 2250719 (1975-05-01), None
patent: WO 94/13473 (1994-06-01), None
patent: WO 98/34885 (1998-08-01), None
patent: WO 2007/024683 (2007-03-01), None
patent: 2008/150944 (2008-12-01), None
Machine translation of FR 2250719, The European Patent Office, [online], [retrieved on Aug. 10, 2010]. Retrieved from the Internet: <URL: http://ep.espacenet.com/?locale=EN—ep>.
Subramani et al. “Synthesis and Characterization of Water-borne Crosslinked Silyated Polyurethane Dispersions” Journal of Applied Polymer Science, Jul. 26, 2005, pp. 620-631, vol. 98, Issue 2, Wiley Periodicals, Inc.
Subramani et al. “Synthesis and Characterization of Silyated Polyurethane from Methyle Ethyl Ketoxime-Blocked Polyurethane Dispersion” Feb. 11, 2004.
PCT International Search Report PCT/US2008/077672 dated Mar. 31, 2009.
Office action from U.S. Appl. No. 11/809,501 dated Nov. 9, 2009.
Office action from U.S. Appl. No. 11/809,501 dated Jul. 14, 2010.
International Search Report and Written Opinion from PCT/US08/065196 dated Dec. 10, 2008.
Office action from U.S. Appl. No. 11/809,501 dated Nov. 23, 2010.

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