| 摘要 |
PROBLEM TO BE SOLVED: To obtain a natural moth-proofing agent capable of stably dissipating active component with time and free from the loss of the active component when producing. SOLUTION: Crystalline 1-menthone is packaged with a microporous thermoplastic resin sheet having innumerable micropores having pore diameter of >=1μm and average pore diameter of <=20μm, exhibiting air-permeability and resistant to the penetration of molten 1-menthone.
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