| 摘要 |
PURPOSE:To attain the desired slow release and decrease in volume of an aromatic substance caused by time-dependent volatilization by wrapping the aromatic substance with a synthetic resin membrane of a specific thickness, which is impervious to a liquid but pervious to a gas and on the outer surface of which a viscose processed paper is laminated. CONSTITUTION:A synthetic resin membrane used is impervious to a liquid but pervious to a gas and is 10-50mum thick. A thermoplastic viscose processed paper is made of cellulose film with pores and has an adequate air-permeability that can be controlled according to characteristics of an aromatic substance used and a desired duration time. An aromatic substance wrapped may be various: e.g., natural refined oil, a mixed liquid aromatic, a powdery aromatic and a granular carrier supporting an aromatic. A prescribed amount of the aromatic substance is impregnated into the processed paper, and the opening of the paper is then heated to be sealed. The aromatic constructed as above has a desired slow release rate of the substance. |
