| 摘要 |
A multilayer stack of polymeric sheets can be used in thermoforming processes to make objects wherein each sheet has substantially the same shape, The stack includes at least one sheet of a thermoformable polymer, arid can include many such sheets. A barrier layer is interposed between at least an overlapping portion at least two of the polymeric sheets in order to prevent fusion of the sheets in the overlapping portion during the thermoforming process. The barrier layer can include an adhesive that adheres the sheets in the overlapping portion. In formed articles including such an adhesive, the sheets can be manually peeled from one another if a suitable adhesive is selected. The stack (and object formed using the stack) can include polymeric sheets that are not thermoformable, but are adhered to the surface of a thermoformabie sheet. The sheets and objects can include multiple separable and/or peclable sheets. The stack is amenable for simultaneous manufacture of multiple thermoformed items having substantially identical shapes, The stack is also amenable for manufacture of thermoformed items having multiple peelable layers, including items (e.g., paint trays) in which is desirable to remove a soiled surface rather than cleaning that surface. |
