| 摘要 |
PROBLEM TO BE SOLVED: To obtain a water absorbing material capable of effectively absorbing water, retaining the freshness of a food, etc., keeping the quality of the food such as a taste at a prescribed level and improving the merchandise value by covering a specific water absorbing film with layers containing an additive. SOLUTION: This water absorbing material is obtained by covering a water absorbing film consisting essentially of a polyethylene oxide-based polymer with layers containing an additive such as a taste substance, e.g. sodium glutamate or a nutrient supplementing substance, etc., e.g. vitamin C. Furthermore, a density gradient is preferably formed in the density of the principal component of the layers in contact with the dehydrated object so that the amount of the additive on the surface on the side in contact with the object is larger than that on the surface on the opposite side and a food treating tool comprising a means for absorbing drips exuded from the dehydrated object with time and a means for irreversibly releasing the additive capable of being eluted in the drips is preferably composed.
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