Fibreboard - soft (fibreboard production - soft - from wet & dry processes)

Emissions generated by the activity within the product supply chain as described in ecoinvent v3.10. The product 'fibreboard soft' also called softboard or wood insulation board is an engineered wood product in conformity with the standard EN 13171. Soft fibreboard consists of up to 85% of wood fibres which have been produced in either the dry or the wet process from wood residues from sawmills (e. g. sidings) and from wood chips. When produced in the dry process it is also called low density fibre board. In the wet process the raw material is grinded and then mixed into a mash with up to 98% water. This mash is then formed into a so-called fibre cake. After pressing most water out of the mat the fibre cake is the cut and dried in the drying channel with temperatures between 160 to 220 °C. The addition of binders is usually not required as the heating of the liquid lignin as part of the wood bonds the fibres during cooling. For special purposes (higher strength hydrophobic properties) resins or bitumen-containing agents can be added. Thicker boards are produced from gluing together several standard boards. In the dry process the fibres are dried directly after grinding and mixed with up to 4% resin (e. g. PUR resin). For the production of flexible insulation boards synthetic textile fibres or fibres from corn starch are added to the wood fibres. Subsequently the fibres are sprinkled in desired thickness pressed hardened with a mixture of vapour and air and then cut stacked and packed. Softboard is applied for building shell like roofs walls and floors acting as thermal and acoustic insulating material. Softboard regulates moisture balance permitting fully vapour permeable construction which avoids the risk of interstitial condensation or rot without the use of membranes or vented cavities. The cut-off classification is allocatable product. The activity type is ordinary transforming activity. The reference product amount is 1.