| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus and method for retaining and releasing a solid material in which the apparatus and method do not always have the desired (complete) transfer or the complete and/or accurate release of the solid material when indirect printing or transfer processes or high process speeds or fine particulate materials are used, or when a moving surface (such as a print roll or drum) comprises substantial zones extending in the machine direction and cross-machine direction without reservoirs, in processes for making absorbent cores with fibers and/or superabsorbent polymer particles (SAP particles), depending on the requirements of the structures.SOLUTION: An apparatus is provided for making a structure comprising solid material 100a and typically a substrate 80, the apparatus comprising a first moving endless surface and adjacent thereto one or more stationary primary (vacuum) gas containers (chambers) 71C, 71D at least one thereof being connected to a secondary (vacuum) gas container 2, whereby the pressure difference between primary and secondary containers is minimized; and methods using such an apparatus. |
