Abstract
For the first time ever in Germany Douglas fir wood was pilot tested in industrial TMP production. The objective was to follow up comprehensive laboratory investigations by testing the suitability of Douglas fir wood for large-scale pulp production. A total of approx. 550 m3 (about 1181 oven dry weight) Douglas fir from thinnings were converted into TMP. The quality of the resultant Douglas fir TMP was tested by approved chemical, technological and optical methods and compared with results for TMP manufactured from spruce. Special emphasis was placed on the characterization of the test material, tree age as well as annual ring width, increment, sapwood and heartwood portions. A direct comparison of the two tree species as regards TMP qualities and the interpretation of results was difficult due to overlapping effects based on the use of waste sawnwood on the one hand and roundwood from thinnings on the other. One disadvantage, apart from the deliberately high heartwood portion, was the concomitant great portion of juvenile wood when roundwood was used. The above pilot tests, however, clearly show that the addition of defined amounts of Douglas fir to spruce for TMP chips lead to satisfactory results.
| Translated title of the contribution | TMP from Douglas fir - Results of pilot plant tests |
|---|---|
| Original language | German |
| Pages (from-to) | 3-10 |
| Number of pages | 8 |
| Journal | Papier |
| Volume | 50 |
| Issue number | 1 |
| State | Published - Jan 1996 |