Natural fiber plastic composite precursor material for compounding, method for preparing thereof and method for preparing natural fiber plastic composite product
AssigneeUpm-Kymmene Corporation
InventorsJuha NIKKOLA, Ari KINNUNEN, Gerhard ERNST
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Abstract
The present disclosure relates to a natural fiber plastic composite precursor material comprising 80-95% (w/w) cellulosic fibers having an average fiber length less than 1 mm, 3-7% (w/w) coupling agent, 0-7% (w/w) thermoplastic polymer, and 0-1% (w/w) lubricant and/or wax, wherein the material is in form of pellets having a bulk density in the range of 300-700 g/l, and to a method for preparing thereof. The present disclosure also relates to a method for preparing a natural fiber plastic composite product.
Claims30
A method for preparing a natural fiber plastic composite precursor material for compounding, the method comprising
- forming a mixture comprising
- 80-95% (w/w) cellulosic fibers having an average fiber length less than 1 mm,
- 3-7% (w/w) coupling agent,
- 0-7% (w/w) thermoplastic polymer,
- 0-1% (w/w) lubricant and/or wax, and
- forming the mixture in a melt process into pellets having a bulk density in the range of 300-700 g/l to obtain the natural fiber plastic composite precursor material.
A natural fiber plastic composite precursor material for compounding, the material comprising
- 80-95% (w/w) cellulosic fibers having an average fiber length less than 1 mm,
- 3-7% (w/w) coupling agent,
- 0-7% (w/w) thermoplastic polymer, and
- 0-1% (w/w) lubricant and/or wax, wherein the material is in form of pellets having a bulk density in the range of 300-700 g/l.
The natural fiber plastic composite precursor material of claim, comprising 85-95% (w/w) cellulosic fibers, such as 90-94% (w/w) or 91-95% (w/w).
(canceled)
Dependencies are inferred from the claim text.