| 摘要 |
A packaged liquid-filled plastic tube is provided to achieve a desirably long shelf life. The tube is formed from PET, polypropylene or otherknown plastics that exhibit high liquid permeability. A liquid additive of a specified volume, concentration and/or solubility is placed in the tube and the tube is sealed. Loss of liquid through the permeable tube is prevented by a moisture barrier film that is sealed around the tube. The moisture barrier film maintains a high relative humidity adjacent said tube and substantially minimizes transport of liquid vapor through the plastic of the tube. <IMAGE>
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