| 摘要 |
<p>A tough, flexible, sheet-like matrix for a bas-relief pattern is made by casting a reinforced resin on a mold (10) of the pattern and submerging a perforated plate (22) in the liquid resin so that the plate is parallel to a substantially flat plane generated by the lowest points of the pattern. The matrix (30), exclusive of the peaks and valleys of the pattern, has a uniform thickness and has a multitude of studs (33) integral with and dependent from the sheet. A porous matrix is useful for the wet-end texturing of fiberboard at the final suction press roll of a Fourdrinier fiberboard machine. </p> |
