Boards from acetylated rubberwood
AssigneeTricoya Technologies Ltd
InventorsStefan Van Dommele, Theodorus Gerardus Marinus Maria Kappen
Life of this patent
Estimating the term…
Abstract
Disclosed is a board made from acetylated rubberwood elements and a method for making same. The acetylated rubberwood elements have an acetyl content of at least 17% and/or are prepared by acetylating rubberwood elements using an acetylation agent in the vapour phase. The invention also pertains to acetylated rubberwood elements prepared by using an acetylation agent in the vapour phase.
Claims12
A board comprising acetylated wood elements, wherein the acetylated wood elements are obtained from rubberwood, wherein said acetylated wood elements have an acetyl content of at least 17%, and wherein said acetylated wood elements are selected from the group consisting of fibres, chips, particles, splinters, and fibre bundles;
- wherein the board has an increased internal bond strength compared to a non-acetylated reference board;
- wherein fibres have a length of from 1 mm to 5 mm, a width of from 0.05 mm to 0.1 mm, and a thickness of from 0.05 mm to 0.1 mm;
- chips have a length of from 5 mm to 75 mm, a width of from 5 mm to 50 mm, and a thickness of from 1.5 mm to 25 mm;
- particles have a length of from 1.5 mm to 20 mm, a width of from 0.15 mm to 5 mm, and a thickness of from 0.15 mm to 5 mm;
- splinters have a length of from 5 mm to 75 mm, a width of from 0.15 mm to 0.5 mm, and a thickness of from 0.15 mm to 0.5 mm;
- and
- fibre bundles have a length of from 1.5 mm to 25 mm, a width of from 0.15 mm to 5 mm, and a thickness of from 0.15 mm to 5 mm.
A method for producing a board of acetylated rubberwood elements, wherein the method comprises the subsequent steps of:
- a) providing wood elements from rubberwood, wherein said wood elements are selected from the group consisting of fibres, particles, splinters, and fibre bundles;
- and
- b) contacting said wood elements with an acetylation agent to obtain acetylated rubberwood elements having an acetyl content of at least 17%;
- and
- c) forming the board from the acetylated rubberwood elements,
- wherein the board has an increased internal bond strength compared to a non-acetylated reference board;
- wherein fibres have a length of from 1 mm to 5 mm, a width of from 0.05 mm to 0.1 mm, and a thickness of from 0.05 mm to 0.1 mm;
- particles have a length of from 1.5 mm to 20 mm, a width of from 0.15 mm to 5 mm, and a thickness of from 0.15 mm to 5 mm;
- splinters have a length of from 5 mm to 75 mm, a width of from 0.15 mm to 0.5 mm, and a thickness of from 0.15 mm to 0.5 mm;
- and
- fibre bundles have a length of from 1.5 mm to 25 mm, a width of from 0.15 mm to 5 mm, and a thickness of from 0.15 mm to 5 mm.
A method for producing a board of acetylated rubberwood elements, wherein the method comprises the subsequent steps of:
- a) providing wood elements from rubberwood, wherein said wood elements are chips;
- b) contacting said wood elements with an acetylation agent to obtain acetylated rubberwood elements having an acetyl content of at least 17%;
- c) refining said acetylated rubberwood elements to obtain fibres;
- and
- d) forming a board from the fibres,
- wherein the board has an increased internal bond strength compared to a non-acetylated reference board;
- wherein fibres have a length of from 1 mm to 5 mm, a width of from 0.05 mm to 0.1 mm, and a thickness of from 0.05 mm to 0.1 mm;
- and
- chips have a length of from 5 mm to 75 mm, a width of from 5 mm to 50 mm, and a thickness of from 1.5 mm to 25 mm.
Dependencies are inferred from the claim text.