Modified wooden sheet, method for producing same, and modifying agent
AssigneeDaicel Corporation
InventorYuichiro EGAWA
Life of this patent
Estimating the term…
Abstract
Provided is a wooden sheet having high flexibility (for example, folding resistance) and processability (for example, degree of processing freedom) even if the wooden sheet is considerably thick. Also provided is a method that can be used to produce such a wooden sheet. The wooden sheet is modified with a modifying agent including a combination of an acid or an alkali and a compound having a hydroxyl group.
Claims7
A wooden sheet modified with a modifying agent, the modified agent including a combination of an acid or an alkali and a compound having a hydroxyl group,
- wherein the wooden sheet has a thickness from 0.05 to 4 mm,
- wherein a diameter of a mandrel in a folding resistance test is not greater than 20 mm, and
- wherein, in the folding resistance test,
- a plurality of mandrels with different diameters are prepared, and under conditions including a temperature of 25° C., a duration of folding of 1 second, and a folding angle of 180°, a folding is conducted by winding a test piece around a mandrel with the largest diameter among the plurality of the mandrels, and observing the test piece visually to determine whether a crease has occurred in the wound portion;
- then, another folding is conducted with a mandrel having a smaller diameter than the mandrel of the previous folding, and this process is repeated until the folding causes a crease in the test piece;
- and the maximum diameter of the mandrel at which the folding does not cause a crease in the test piece through the process is determined.
(canceled)
(canceled)
A method for producing a wooden sheet, the method comprising immersing a natural wood sheet in a modifying agent including a combination of an acid or an alkali and a compound having a hydroxyl group to modify the natural wood sheet,
- wherein the wooden sheet has a thickness from 0.05 to 4 mm,
- wherein a diameter of a mandrel in a folding resistance test is not greater than 20 mm, and
- wherein, in the folding resistance test,
- a plurality of mandrels with different diameters are prepared, and under conditions including a temperature of 25° C., a duration of folding of 1 second, and a folding angle of 180°, a folding is conducted by winding a test piece around a mandrel with the largest diameter among the plurality of the mandrels, and observing the test piece visually to determine whether a crease has occurred in the wound portion;
- then, another folding is conducted with a mandrel having a smaller diameter than the mandrel of the previous folding, and this process is repeated until the folding causes a crease in the test piece;
- and the maximum diameter of the mandrel at which the folding does not cause a crease in the test piece through the process is determined.
A modifying agent for a natural wood sheet, the modifying agent comprising an acid or an alkali and a compound having a hydroxyl group.
Dependencies are inferred from the claim text.