Paper having good absorbency and alkali resistance and method of making said paper
Patent 4218286 Issued on August 19, 1980. Estimated Expiration Date: 
November 24, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 24, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3058873 3484256 Tubular cellulosic casing with cationic thermosetting resin coating Patent #: 3935320 InventorsAssigneeApplicationNo. 05/963452 filed on 11/24/1978US Classes:162/164.3, Epoxy containing reactant138/118.1, Casing162/164.6, Nitrogen containing162/175, Carbohydrate162/177Cellulose derivative (e.g., cellulose ester)ExaminersPrimary: Smith, William F.Attorney, Agent or FirmInternational ClassesA22C 13/00 (20060101)D21H 17/00 (20060101) D21H 17/55 (20060101) D21H 17/56 (20060101) D21H 17/26 (20060101) AbstractFibrous paper webs of high water absorbency and improved alkaline wet tensile strength are obtained by treating the fibers prior to web formation or subsequent to web formation with aqueous solutions of a water-soluble thermosetting reaction product of a polyamide and an epichlorohydrin, a water-soluble nonviscose film-forming material such as hydroxy ethyl cellulose and a water-soluble polyethylene imine. The resultant absorbent sheet material maintains its absorbency upon aging, exhibits high wet caustic strength and can be used in the manufacture of tea bags or food casings.Field of SearchCellulose derivative (e.g., cellulose ester) | |
