| 摘要 |
A green uncured pre-form (10) for an exhaust aftertreatment filter includes first and second sheets (12 and 14) of regenerable filter material, the second sheet being pleated and forming with the first sheet a plurality of axially extending flow channels (32, 80, 81) having lateral cross-sectional shapes with two adjacent included angles (34 and 36, 56 and 58) each greater than 45° and less than 75° and having wall segments (18 and 20, 68 and 70) with a thickness less than 0.8 mm, a porosity greater than 80%, and an extension height (b) between pleat tips less than 10 mm. Forming apparatus (83, 84) and methods are provided.
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