Polyvinyl alcohol fiber for binding a fibrous sheet and a proces

Details Polyvinyl alcohol fiber for binding a fibrous sheet and a proces Polyvinyl alcohol fiber for binding a fibrous sheet and a proces

1979-10-23

1981-05-12

Chin, Peter

Paper making and fiber liberation

Processes and products

Plural fiber containing

162157R, D21H 512

Patent

active

042670160

ABSTRACT:
A water-soluble polyvinyl alcohol fiber is obtained by subjecting to the conventional dry or wet spinning process, a solution prepared by adding to a polyvinyl alcohol aqueous solution, an adduct composed of a polyamide condensation product and 1-halogen-2,3-epoxy propane or ethylene glycol diglycidyl ether in the range from 5 to 50 percent by weight based upon the polyvinyl alcohol-after the solution's pH has been adjusted to 2 to 7. The resulting fiber, which has not been subjected to any heat treatment at a temperature above 120.degree. C. is blended with a fibrous material to make a fibrous sheet such as paper or non-woven fabric. By virtue of a subsequent heat-treatment, said polyvinyl alcohol fiber becomes boiling water-resistant; as a result, the wet strength of the fibrous sheet is significantly increased.

REFERENCES:
patent: 3028296 (1962-04-01), Adams et al.
patent: 3114670 (1963-12-01), Iwasaki

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