Natural fibres as they are used in paper, board and tissue mills fall into one of three categories
Recycled fibre is generally post consumer waste.
Mechanical and chemical fibres have been reduced from a whole plant, (usually a tree), to individual fibres. This process is known as pulping.
Trees are felled, de-branched and transported to the woodyard. Several operations are carried out in the woodyard preparing the wood for the final pulping process.
- Mechanical Pulping is a method of converting logs or wood chips by a mechanical grinding action, into a mass of individual fibres known as mechanical pulp.
- Chemical Pulping is carried out in a digester. It is a method of converting wood chips into a mass of individual fibres known as chemical pulp by the action of chemicals at high temperature and pressure.
- Hybrid Pulping is a method of converting wood chips into a mass of individual fibres known as semi-chemical pulp by the combined action of chemicals, and mechanical action.
- Cleaning recycled fibre is about the initial dispersion of recycled fibre and first steps in removing contamination
- Deinking is a process of removing ink from recycled fibre
Pages in category "Pulping"
This category contains only the following page.