| 摘要 |
<p>A chip pretreatment process and apparatus which comprises conveying the chip material through a compression screw device (22) having an atmosphere of saturated steam at a pressure above about 5 psig, decompressing (24) and feeding the decompressed material from the decompression region (24) into a fiberizing device (26), such as a low intensity refiner, where at least about 30 percent of the fiber bundles and fibers are separated, without substantial fibrillation of the fibers. In another embodiment of the invention the chip defiberizing can be combined with chemical treatments, for improving the pulp property verses energy relationships.</p> |
