| 摘要 |
A squeeze package comprises a flexible plastic hollow vessel containing a viscous substance e.g. tomato paste, the hollow vessel comprising a flexible cylindrical barrel, a narrowed orifice passage 8 connected to the barrel through a shoulder 5 and a residence portion 10 connected to the orifice passage through a stepped portion 9 and having a squeeze opening 6 on the top end thereof. The substance has a viscosity of 1,000 to 250,000 cP, and the dimension of the vessel and the viscosity of the substance are within the range satisfying the requirements represented by the following formulae: log eta >/= -log l -log S1/S0 + 5.45, log eta >/= 0.588 log S0 + 0.764 log E + 2.30, and S1/S0 ??? 2 wherein eta stands for the viscosity (cP) of the substance, S0 stands for the cross sectional area (mm<2>) of the orifice passage, S1 stands for the cross sectional area (mm<2>) of the residence portion, l stands for the length of the residence portion in the axial direction and E stands for the elastic recovery (g) of the cylindrical barrel in the non-packed state. The narrowed orifice passage helps prevent air from being sucked into the container as the container returns to its original shape when the pressing force is released. <IMAGE> |
