Method for drying absorbent modified cellulosic polymers and the like
US4294731A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1980 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Aug 13, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F2/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for oven drying chemically modified cellulosic materials, especially fibers, having improved fluid absorbency involves incorporating into the cellulose structure while swollen an amphiphilic compound miscible with water which will not evaporate when the fiber is oven dried and will remain in the fiber to prevent collapse of the fiber as the water is removed. The improved method of drying the fibrous cellulosic material produces a product having saline absorbency about equal to that produced when the fibers are dried with a water-miscible solvent and avoids the use of volatile solvents and the disadvantages inherent therewith. The fibers provided by the invention are especially suitable for use in pads which are to be used for absorbing water and body fluids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.