Packet of water-soluble film of polyvinyl alcohol filled with detergent composition

Claim 1

A PACKET CONSISTING OF: (1) AN ENVELOPE OF POLYVINYL ALCOHOL IN FILM FORM, SAID FILM BEING FROM ABOUT ONE QUARTER TO ABOUT THREE MILS IN THICKNESS, AND CONTAINING NO MORE THAN ABOUT 27% MOISTURE, AND ENCLOSED THEREIN (2) A WATER-SOLUBLE GRANULAR SYNTHETIC DETERGENT COMPOSITION CONSISTING ESSENTIALLY OF (A) AN ANIONIC NON-SOAP SYNTHETIC ORGANIC DETERGENT, (B) SODIUM TRIPOLYPHOSPHATE IN AN AMOUNT TO ACT AS A BUILDER FOR SAID SYNTHETIC DETERGENT, AND (C) A SALT HYDRATE CHOSEN FROM THE GROUP CONSISTING OF SODIUM PYROPHOSPHATE DECAHYDRATE, POTASSIUM PYROPHOSPHATE TRIHYDRATE, SODIUM TETRABORATE DECAHYDRATE, SODIUM PERBORATE TETRAHYDRATE, MAGNESIUM SULFATE HEPTAHYDRATE, SODIUM ACETATE TRIHYDRATE, POTASSIUM BENZOATE TRIHYDRATE, SODIUM THIOSULFATE PENTAHYDRATE, SODIUM CARBONATE DECAHYDRATE, SODIUM SULFATE, HEPTAHYDRATE, AND SODIUM SULFATE DECAHYDRATE, SAID SALT HYDRATE BEING PRESENT SUBSEQUENT TO THE COMPLETION OF HYDRATION OF SAID SODIUM TRIPOLYPHOSPHATE TO THE HEXAHYDRATE FORM AND THE COMPLETION OF HYDRATION OF ANY OTHER HYDRATABLE INGREDIENTS OF SAID COMPOSITION, IN AN AMOUNT SUCH THAT THE WATER, OF HYDRATION OF SAID SALT HYDRATE CONSTITUTES FROM ABOUT 5% TO ABOUT 20% OF THE TOTAL WEIGHT OF SAID COMPOSITION, WHEREBY SAID POLYVINYL ALCOHOL FILM IS PREVENTED FROM BECOMING BRITTLE AT TEMPERATURES BELOW ABOUT 50*F. BY THE MAINTENANCE OF A RELATIVE HUMIDITY IN THE ATMOSPHERE WITHIN SAID PACKET OF FROM ABOUT 40% TO 100% AT TEMPERATURES FROM ABOUT 0*F. TO 50*F. SO THAT SAID POLYVINYL ALCOHOL FILM FORMING SAID PACKET IS RESISTNAT TO RUPTURE DURING A SUBSTANTIAL DELIVERY AND MAKETING PERIOD.