Package making – Methods – With contents treating
Patent
1980-06-26
1982-08-10
Sipos, John
Package making
Methods
With contents treating
53474, B65B 504
Patent
active
043431348
ABSTRACT:
Nonwoven fibrous sheets bonded with polyvinyl alcohol, intended for use in pre-moistened condition as skin cleansing tissues, are folded and packaged in closed containers or in individual sealed water impervious envelopes; said packaged sheets being maintained in contact with a dilute aqueous solution of boric acid. The boric acid imparts improved wet tensile strength to the sheet during storage and use by the consumer but may be safely disposed of, after use, by flushing in plain water without danger of clogging the plumbing system. Instead of boric acid solution, one may employ for the indicated purpose a non-alkaline aqueous solution of a salt which acts as a precipitating or gelling agent for polyvinyl alcohol, said salt being one having an acid to neutral pH on hydrolysis.
REFERENCES:
patent: 3135648 (1964-06-01), Hawkins
patent: 3213051 (1965-10-01), Pierce
patent: 3355322 (1967-11-01), Worrall
patent: 3438808 (1969-04-01), Hawkins et al.
patent: 3654928 (1972-04-01), Duchane
patent: 3881210 (1975-05-01), Drach et al.
patent: 3895474 (1975-07-01), Bauer
Davidowich George
Miller Gerald D.
Air Products and Chemicals Inc.
Dannells, Jr. Richard A.
Innis E. Eugene
Sipos John
Willis Charles L.
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