| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drip bag which prevents a paper base material having a single-layer or multi-layer paperboard structure used for a locking part from being stained with coffee filled in a water permeable filtering sheet in a drip bag stored in the evaporated aluminum film bag and also prevents hot water or coffee liquid from being absorbed in the paper base material when dripping coffee. <P>SOLUTION: The drip bag has a water permeable filtering sheet bag body having an opening at its upper end and a locking part located on the two outer surfaces opposing the bag body. The locking part comprises the paper base material having a single-layer or multi-layer board paper structure with a wet paper strength reinforcing agent. On the back and front sides of the paper base material, a water-soluble polymer is applied and the cross-sectional water absorption of the locking part is preferably 1.0 g/1,000 mm<SP>2</SP>or less. <P>COPYRIGHT: (C)2010,JPO&INPIT |
