Method of forming a fibrous product
AssigneeTeknologian tutkimuskeskus VTT Oy
InventorsHarri Kiiskinen, Esa Torniainen, Karita Kinnunen
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Abstract
The present invention relates to a method of forming a moulded fibrous product, comprising the steps of foaming an aqueous suspension of natural fibres, optionally in combination with synthetic fibres, to provide a first fibrous foam, a surfactant may be added to aid the foaming, feeding the fibrous foam into a mould, mechanically withdrawing a part of the water contained in the foam to produce a solidified, moist fibrous composition, and evaporating water from the solidified, moist fibrous composition to produce a dry fibrous product.
Claims38
A method of forming a moulded fibrous product, comprising the steps of:
- foaming an aqueous suspension of natural fibres in combination with synthetic fibres to provide a first fibrous foam,
- feeding the first fibrous foam into a mould,
- mechanically withdrawing a part of the water contained in the first fibrous foam to produce a solidified, moist fibrous composition, and
- evaporating water from the solidified, moist fibrous composition to produce a dry fibrous product.
A moulded fibrous product useful as a package or package material, having a density of 5 to 100 kg/m3 and an air content of 90 to 99.5% by volume, said product containing fibres, which are bonded together essentially by hydrogen bonds.
(canceled)
Dependencies are inferred from the claim text.