Paper making process from Canadian / Giant Goldenrod took place a little longer, as this invasive plant has tougher fibres compared to Japanese Knotweed. In order to obtain a suitable fibre length for paper production, the grinding process of fibres lasted longer. On the pilot paper machine, ICP can produce paper of basis weight from 50 to 300 g/m2 and width up to 62 cm.
Therefore, ICP successfully produced another type of paper from invasive alien plants on its pilot paper machine. This time a mixture of a Canadian / Giant Goldenrod was used, which proved to be a suitable plant for paper-making.
The whole paper-making process is divided into several steps:
- cooking of biomass at an increased temperature with addition of chemicals;
- mechanical defiberizing in Holland mill, where fibres are defiberized and shortened;
- grinding in a conical refiner, where fibres get desired length and structure;
- mixing of fibres and other additives (fillers, starch, sizing);
- paper forming;
- calendering to obtain smoother and even surface
- winding the paper into larger rolls.
Producing the paper from Canadian/Giant Goldenrod. Photo: Tea Kapun