WATER-SOLUBLE FILM
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United States of America Patent
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Issued Date -
Jul 24, 2008
app pub date -
Apr 10, 2007
filing date -
Nov 13, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A film-forming composition made from a mixture of PVOH, chitosan, an alkali metal or ammonium bisulfite or metabisulfite, and optional ingredients such as plasticizers, antioxidants, UV stabilizers, surfactants, crosslinking agents, lubricants, and extenders, is disclosed. Also disclosed are a method of making a film from the composition, a resulting film, and a packet made from the film and containing a cleaning composition such as a rinse additive. The composition can be formulated to yield an article such as a film which is soluble only below a predetermined pH threshold.
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