| 摘要 |
A package from which a mixed quantity of first and second distinct materials can be released in a phased sequence under first and second sets of conditions, which comprises… a pouch-like container formed of a porous fabric material containing the first distinct material which is substantially fully water soluble under a first set of conditions and the second distinct material which has a melting point which is above the temperatures normally encountered in the first set of conditions and which is no more than partially water soluble under the first set of conditions;… the porous fabric material having a porosity permitting passage of water and the second distinct material when it is in its melted condition but normally preventing passage of either of the first and second distinct materials therethrough when the package is kept out of water and below the melting point of the second distinct material. |
