Claims
- 1. A method for forming a crosslinkable fibrous product comprising:applying a crosslinking agent to a fibrous cellulosic sheet; drying the fibrous sheet to provide a fibrous product comprising substantially noncrosslinked cellulosic fibers; and forming the fibrous sheet into a rolled sheet.
- 2. A method for forming a crosslinked cellulosic product comprising:conveying a crosslinkable fibrous sheet into a fiberizer, wherein the crosslinkable fibrous sheet comprises cellulosic fibers and a crosslinking agent, wherein the sheet comprises substantially noncrosslinked fibers, and wherein the sheet is a rolled sheet; separating the fibrous sheet into individualized fibers in the fiberizer, wherein the individualized fibers comprise fibers coated with the crosslinking agent; and heating the individualized fibers to cure the crosslinking agent to provide intrafiber crosslinked cellulosic fibers.
- 3. The method of claim 2 further comprising applying a crosslinking catalyst to the crosslinkable fibrous sheet.
- 4. A method for forming a crosslinked cellulosic product comprising:conveying a crosslinkable fibrous sheet into a fiberizer, wherein the crosslinkable fibrous sheet comprises cellulosic fibers and a crosslinking agent, wherein the sheet comprises substantially noncrosslinked fibers, and wherein the sheet is a rolled sheet; separating the fibrous product into individualized fibers in the fiberizer, wherein the individualized fibers comprise fibers coated with the crosslinking agent; forming a fibrous sheet comprising the individualized fibers; and subjecting the fibrous sheet to conditions sufficient to cure the crosslinking agent to provide a fibrous sheet comprising intrafiber crosslinked cellulose fibers.
- 5. The method of claim 4 wherein forming a fibrous sheet comprises combining the individualized fibers with a fiber selected from the group consisting of groundwood fibers, bleached pulp fibers, unbleached pulp fibers, recycled wood fibers, secondary wood fibers, hemp fibers, bagasse fibers, and cotton fibers.
- 6. The method of claim 4 wherein subjecting the fibrous sheet to conditions sufficient to form intrafiber crosslinked cellulosic fibers comprises heating to cure the crosslinking agent.
- 7. The method of claim 4 wherein subjecting the fibrous sheet to conditions sufficient to form intrafiber crosslinked cellulosic fibers comprises applying a crosslinking catalyst to the crosslinkable fibrous sheet and heating to cure the crosslinking agent.
- 8. The method of claim 4 wherein subjecting the fibrous sheet to conditions sufficient to form intrafiber crosslinked cellulosic fibers comprises adjusting the pH of the crosslinkable fibrous sheet and heating to cure the crosslinking agent.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a divisional of U.S. patent application Ser. No. 09/299,712, filed Apr. 26, 1999, priority of the filing date of which is hereby claimed under 35 U.S.C. §120 now U.S. Pat. No. 6,300,259.
US Referenced Citations (6)
Number |
Name |
Date |
Kind |
4624890 |
Lloyd et al. |
Nov 1986 |
A |
5071681 |
Manning et al. |
Dec 1991 |
A |
5149334 |
Lahrman et al. |
Sep 1992 |
A |
5183707 |
Herron et al. |
Feb 1993 |
A |
5789326 |
Hansen et al. |
Aug 1998 |
A |
5938995 |
Koltisko, Jr. et al. |
Aug 1999 |
A |
Foreign Referenced Citations (6)
Number |
Date |
Country |
0 251 674 |
Jun 1987 |
EP |
0 251 673 |
Jan 1988 |
EP |
0 427 317 |
Oct 1990 |
EP |
WO 9005808 |
May 1990 |
WO |
WO 9314264 |
Jul 1993 |
WO |
WO 9617573 |
Jun 1996 |
WO |