| 摘要 |
<p>A porous panel with a surface area of at least 0.5 m2, e.g. for use in the production of filters for molten polymer processing,comprises a first layer of metal fibers of an average equivalent diameter between 8 and 65 µm. The cross-section of the metal fibers has two neighboring straight sides with an included angle of less than 90° and one or more irregularly shaped curved sides. The metal fibers have an average length of at least 6 mm. The metal fibers are bonded to each other by means of metal bonds; wherein the metal of the metal fibers of the first layer is the bonding agent forming the metal bonds. The filter comprises a second layer of metal fibers. The average equivalent diameter of the metal fibers of the second layer is smaller than the average equivalent diameter of the metal fibers of the first layer. The first layer and the second layer are bonded to each other by metal bonds, wherein the metal of the metal fibers of the first layer and of the second layer is the bonding agent forming the metal bonds. The porous panel can be advantageously used in the production of filters for molten polymer processing, as the porous panel simplifies the production process of such filters and provides a filter with excellent gel shearing properties and excellent filtration performance.</p> |
