Claims
- 1. A method for preparing individualized, crosslinked cellulosic having high wet bulk, comprising:applying a glyoxal crosslinking combination to a cellulosic fibrous sheet, wherein the crosslinking combination comprises glyoxal, a glycol, and a crosslinking catalyst; separating the fibrous sheet into individual fibers; drying and then curing the individual fibers for sufficient time and at sufficient temperature to provide individualized, crosslinked cellulosic fibers having a wet bulk greater about 20 cc/g at 0.6 kPa.
- 2. The method of claim 1, wherein applying the glyoxal crosslinking combination comprises spraying an aqueous solution of the combination onto the fibrous sheet.
- 3. The method of claim 1, wherein separating the fibrous sheet into individual fibers comprises fiberizing in a hammermill.
- 4. The method of claim 1, wherein the temperature is about 150° C.
- 5. The method of claim 1, wherein the time is about 15 minutes.
- 6. The method of claim 1, wherein the time is about 20 minutes.
- 7. A method for preparing individualized, crosslinked cellulosic having high wet bulk, comprising:applying a glyoxal crosslinking combination to a cellulosic fibrous sheet, the crosslinking combination consisting essentially of glyoxal and a crosslinking catalyst; separating the fibrous sheet into individual fibers; drying and then curing the individual fibers for sufficient time and at sufficient temperature to provide individualized, crosslinked cellulosic fibers having a wet bulk greater about 20 cc/g at 0.6 kPa.
- 8. The method of claim 7, wherein applying the glyoxal crosslinking combination comprises spraying an aqueous solution of the combination onto the fibrous sheet.
- 9. The method of claim 7, wherein separating the fibrous sheet into individual fibers comprises fiberizing in a hammermill.
- 10. The method of claim 7, wherein the temperature is about 150° C.
- 11. The method of claim 7, wherein the time is about 15 minutes.
- 12. The method of claim 7, wherein the time is about 20 minutes.
CROSS-REFERENCES TO RELATED APPLICATIONS
This application is a divisional of U.S. patent application Ser. No. 09/690,136, filed Oct. 16, 2000, now U.S. Pat. No. 6,551,706, issued Apr. 22, 2003, which is a continuation of U.S. patent application Ser. No. 09/240,085, filed Jan. 29, 1999, now U.S. Pat. No. 6,207,278 B1, issued Mar. 27, 2001. The benefits of the priority of the filing dates of U.S. patent application Ser. No. 09/240,085 and U.S. patent application Ser. No. 09/690,136 are hereby claimed under 35 U.S.C. §120.
US Referenced Citations (14)
Continuations (1)
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Number |
Date |
Country |
Parent |
09/240085 |
Jan 1999 |
US |
Child |
09/690136 |
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US |