Unidirectional wood fiber paper and its manufacturing method, unidirectional wood fiber paper prepreg and its manufacturing method, and wood fiber reinforced composite material
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- FRESHAPE SA
- Filing Date
- 2024-11-15
- Publication Date
- 2026-06-23
AI Technical Summary
【0049】 本発明に提案された単一方向木繊維紙では、当該単一方向木繊維紙が、部分的な物質を取り除いた単一方向木肌が少なくとも一方向に沿って収縮することにより形成される。当該部分的な物質は木質素と半繊維素とを含む。当該単一方向木繊維紙の厚さが0.6mm以下である。0.005MPa以下の面圧力の作用下で当該単一方向木繊維紙の見かけの厚さは単一方向木繊維紙の平均厚さの4倍を超えない。本発明に提案された単一方向木繊維紙は、現行技術と比べて小さい厚さ、優れた力学特性及び異方性を持ち、100%純粋な天然材料から成るものであり、且つ当該単一方向木繊維紙が収縮処理を通して厚さ方向の緻密化効果を備えるだけでなく、単一方向木繊維紙の横方向の接着性と緻密度が高まり、単一方向木繊維紙の横方向の裂開が減る。
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Figure 2026520241000001_ABST
Abstract
Claims
1. A unidirectional wood grain, with some material removed, is formed by contraction along at least one direction; The aforementioned partial material comprises woody material and semifiber; The thickness is 0.6 mm or less; Under a surface pressure of 0.005 MPa or less, the apparent thickness does not exceed four times the average thickness of unidirectional wood fiber paper. A unidirectional wood fiber paper characterized by the following features.
2. The aforementioned unidirectional wood fiber paper includes wood fibers and / or bundles of wood fibers; The wood fibers and / or bundles of wood fibers are arranged or stretched microscopically along one direction as a whole. The unidirectional wood fiber paper according to feature 1.
3. The density of the aforementioned unidirectional wood fiber paper is 0.8 to 1.5 g / cm³. ３ and / or The surface density of the aforementioned unidirectional wood fiber paper is 20 to 400 g / m². ２ and / or The tensile strength of the unidirectional wood fiber paper in the direction parallel to the longitudinal direction of the wood fibers is 150 to 1000 MPa. The unidirectional wood fiber paper according to feature 2.
4. The thickness of the unidirectional wood fiber paper is 0.03 to 0.6 mm; and / or The Young's modulus of the unidirectional wood fiber paper in the direction parallel to the longitudinal direction of the wood fibers is 20 to 80 GPa. The unidirectional wood fiber paper according to feature 2.
5. The thickness of the unidirectional wood grain is 0.8 mm or less, and / or According to the decomposition of the force, the contraction includes lateral contraction and thickness contraction. The unidirectional wood fiber paper according to feature 1.
6. The unidirectional wood grain from which the partial material has been removed shrinks along at least two directions; The aforementioned shrinkage includes lateral shrinkage and thickness shrinkage; The directions of the contraction forces of the lateral contraction and the thickness contraction intersect. The unidirectional wood fiber paper according to feature 1.
7. The unidirectional wood grain, from which partial material has been removed, contains wood fibers and / or bundles of wood fibers; the wood fibers and / or bundles of wood fibers as a whole are microscopically arranged or extended along one direction; The aforementioned lateral contraction force is a force in the horizontal direction of the wood grain, and a force that intersects in plane with the extension direction of the wood fibers and / or bundles of wood fibers; and / or, The shrinkage force of the aforementioned thickness reduction is a force in the direction perpendicular to the wood grain in a single direction; The force in the horizontal direction and the force in the vertical direction are forces that are initially applied independently, and / or forces that are formed after the combination or decomposition of forces. The unidirectional wood fiber paper according to feature 6.
8. Under the application of a surface pressure of 0.005 MPa, the apparent thickness of the unidirectional wood fiber paper shall not exceed three times the average thickness of the unidirectional wood fiber paper; and / or The entire and / or part of the aforementioned unidirectional wood fiber paper has a smooth, resinous texture; and / or When the thickness of the unidirectional wood fiber paper is less than 0.15 mm, the light transmittance of the entire and / or a part of the unidirectional wood fiber paper is 2% to 70%. The unidirectional wood fiber paper according to feature 6.
9. The weight reduction rate of the unidirectional wood grain obtained by removing a portion of the material relative to the unidirectional wood grain is 10% to 60%; and / or The lateral shrinkage rate is 2% to 40%, and the thickness shrinkage rate is 20% to 90%. The unidirectional wood fiber paper according to feature 6.
10. S1) Chemically modifying a unidirectional wood grain to obtain a unidirectional wood grain from which partial substances have been removed; S2) The unidirectional wood grain from which a portion of the material has been removed shrinks along at least one direction, thereby obtaining unidirectional wood fiber paper; According to the decomposition of the force, the contraction includes lateral contraction and thickness contraction. A method for producing unidirectional wood fiber paper, characterized by the following:
11. The thickness of the unidirectional wood grain is 0.05 to 0.8 mm; and / or The surface density of the aforementioned unidirectional wood grain is 20 to 450 g / m². ３ and / or The chemical modification in S1) is carried out in a sealed high-pressure system; the target temperature of the chemical modification is 100 to 150°C, the target surface pressure of the chemical modification is 0.07 to 1.9 MPa; the duration of the chemical modification under the action of the target temperature / target surface pressure is 1 to 12 hours; or The chemical modification is performed under normal pressure, the duration of the chemical modification is 24 to 72 hours under the action of the target temperature / target surface pressure, and the temperature of the chemical modification is the boiling point of water under normal pressure; and / or After chemical modification, the reaction solution is cooled to obtain a unidirectional wood grain by removing some of the material. The manufacturing method according to claim 10, characterized in that it
12. The chemical modifier in S1) comprises an alkaline substance, a sulfonating agent, and water; The pH value of the chemical modifier is 12 to 14; The concentration of the alkaline substance in the chemical modifier is 0.01 to 5 kg / L; The alkaline substance is selected from one or more of sodium hydroxide, potassium hydroxide, sodium bicarbonate, and potassium bicarbonate; The concentration of the sulfonating agent is 0.01 to 5 kg / L; The sulfonating agent in the chemical modifier is selected from one or more of sulfites, chlorsulfonic acid, hydroxymethylsulfonate, sulfuryl chloride, and sulfamic acid; and / or The ratio of the unidirectional wood grain to the chemical modifier is 4.6 to 184 cm. ３ : 1L and / or The weight of the unidirectional wood grain from which some material has been partially removed is 10% to 60% lower than the weight of the unidirectional wood grain. The manufacturing method according to claim 10, characterized in that it
13. The aforementioned unidirectional wood grain is placed in a raw material frame for chemical modification; The raw material frame includes a frame body, a partition plate, and a frame cover; the partition plate is installed inside the frame body; and holes are provided in the side walls of the frame body, the bottom of the frame body, the partition plate, and the frame cover. The manufacturing method according to claim 10, characterized in that it
14. The raw material frame is cylindrical, and multiple partition plates are arranged within it, with the multiple partition plates arranged concentrically around the frame body. The manufacturing method according to claim 13, characterized in that it
15. The raw material frame is shaped like a rectangular parallelepiped, and a plurality of partition plates are arranged within it, with the plurality of partition plates arranged parallel to each other within the frame body. The manufacturing method according to claim 13, characterized in that it
16. The shrinkage process includes a lateral shrinkage process and a thickness shrinkage process; the force of the lateral shrinkage process intersects with the force of the thickness shrinkage process. The manufacturing method according to claim 10, characterized in that it
17. The aforementioned lateral shrinkage treatment is selected from shrinkage due to external mechanical force applied in the lateral direction and / or spontaneous shrinkage during dehydration; The external mechanical force applied in the lateral direction intersects in plane with the extension direction of the wood fibers and / or fiber bundles of the unidirectional wood grain, from which the partial material has been removed. The manufacturing method according to claim 16.
18. The external mechanical force applied laterally is the force generated by applying pressure to a unidirectional wood surface from which a film material exhibiting lateral contraction has been partially removed, and / or by removing the film material. The pressure applied when rolling over a unidirectional wood surface from which some material has been removed; and / or This is the pressure applied laterally to a unidirectional wood grain from which some material has been removed. The manufacturing method according to claim 17, characterized by the features described above.
19. The surface pressure of the external mechanical force applied in the lateral direction is 0.001 to 1.5 MPa; and / or The temperature of the lateral shrinkage treatment is 15°C to 150°C; and / or The time for the aforementioned lateral contraction process is 1 s to 4 min. The manufacturing method according to claim 17, characterized in that it
20. The thickness reduction treatment includes a hot press treatment under negative pressure conditions; The surface pressure of the aforementioned hot-pressure treatment is 0.1 to 60 MPa; and / or The temperature of the aforementioned heat and pressure treatment is 50°C to 150°C; and / or The duration of the aforementioned heat and pressure treatment is 0.5 to 20 minutes. The manufacturing method according to claim 16.
21. The thickness reduction is performed on a single sheet or in a stacked state; the number of stacked layers is 2 to 20 sheets; and the surface pressure of the thickness reduction treatment in the stacked state is 0.1 to 60 MPa. The manufacturing method according to claim 16.
22. The contraction rate of the aforementioned lateral contraction is 2% to 40%; and / or The shrinkage rate of the aforementioned thickness reduction is 20% to 90%. The manufacturing method according to claim 10, characterized in that it
23. Joining is performed before or after shrinkage treatment; The aforementioned joining involves marking the outline of the joint on a unidirectional wood grain or shrink-treated wood fiber paper from which partial material has been removed, and then joining the corresponding parts. The manufacturing method according to claim 10, characterized in that it
24. A1) Chemically modifying a unidirectional wood grain to obtain a unidirectional wood grain from which partial substances have been removed; A2) The process includes shrinking and flattening the unidirectional wood grain, from which partial material has been removed, in at least one direction, to obtain unidirectional wood fiber paper; The planarization process involves performing planar thermal compression in a negative pressure extraction environment. A method for producing unidirectional wood fiber paper, characterized by the following:
25. When performing the planarization process, an exhaust passage is provided on the double contact surface or single contact surface of the unidirectional wood fiber paper. The manufacturing method according to claim 24, characterized by the above.
26. The surface pressure of the aforementioned planar thermal compression is 0.01 to 2 MPa; and / or The time for the planarization process is 0.1 to 4 min; and / or The temperature of the planarization process is 40°C to 150°C. The manufacturing method according to claim 24, characterized by the above.
27. The planarization process is selected from one or more of the following: vacuum forming and negative pressure thermal compression; and / or The moisture content of the aforementioned unidirectional wood fiber paper is less than 10%. The manufacturing method according to claim 24, characterized by the above.
28. The shrinkage treatment includes a lateral shrinkage treatment and a thickness shrinkage treatment; The aforementioned thickness reduction treatment involves applying mechanical pressure in the thickness direction; The surface pressure of the mechanical pressure applied in the thickness direction is 0.01 to 80 MPa; and / or The time for the aforementioned thickness reduction treatment is 0.1 to 3 min; and / or The temperature of the thickness shrinkage treatment is 15 to 150°C. The manufacturing method according to claim 24, characterized by the above.
29. A unidirectional wood fiber paper manufactured according to any one of claims 1 to 9, or a unidirectional wood fiber paper manufactured according to any one of claims 10 to 28, and a polymer layer that adheres at least one surface of the unidirectional wood fiber paper, A wood fiber paper prepreg characterized by the following features.
30. The weight of the polymer layer is 5% to 85% of the weight of the unidirectional wood fiber paper prepreg; and / or The thickness ratio of the polymer layer to the unidirectional wood fiber paper is 5:1 to 0.05:1; and / or The surface density of the aforementioned oriented wood fiber paper prepreg is 30 to 500 g / m². ２ and / or The thickness of the unidirectional wood fiber paper prepreg is 0.03 to 0.7 mm. The wood fiber paper prepreg according to feature 29.
31. The polymer layer comprises a thermoplastic polymer and / or a thermosetting polymer; The gram weight of the aforementioned polymer layer is 5 to 200 g / m². ２ That is, The wood fiber paper prepreg according to feature 29.
32. This includes transferring a polymer polymer to at least one surface of a unidirectional wood fiber paper manufactured according to any one of claims 1 to 9, or a unidirectional wood fiber paper manufactured according to any one of claims 10 to 28, to obtain a unidirectional wood fiber paper prepreg; The method of the transition is selected from one or more of coating, printing, penetration, and coating. A method for producing a unidirectional wood fiber paper prepreg, characterized by the following:
33. The present invention comprises a multilayer unidirectional wood fiber paper according to any one of claims 1 to 9, or a multilayer unidirectional wood fiber paper manufactured according to the manufacturing method described in any one of claims 10 to 28; Adjacent unidirectional wood fiber papers are bonded using a polymer. A wood fiber paper reinforced composite material characterized by the following features.
34. The tensile strength of the wood fiber paper reinforced composite material is 130 to 1000 MPa; and / or The wood fiber paper reinforced composite material has a bending strength of 130 to 1000 MPa; and / or The Young's modulus of the wood fiber paper reinforced composite material is 12 to 75 GPa. The wood fiber paper reinforced composite material according to feature 33.
35. The thickness of the unidirectional wood fiber paper in the wood fiber paper reinforced composite material is 0.02 to 0.6 mm; and / or The layers clearly overlap in the longitudinal section of the wood fiber paper reinforced composite material; and / or The volume ratio of wood fiber paper in the aforementioned wood fiber paper reinforced composite material is 40% to 99%. The wood fiber paper reinforced composite material according to feature 33.
36. The wood fiber paper reinforced composite material according to claim 33, characterized in that a waterproof polymer layer is provided on at least one surface of the wood fiber paper reinforced composite material.
37. The method includes stacking unidirectional wood fiber paper manufactured according to any one of claims 1 to 9, or according to the manufacturing method described in any one of claims 10 to 28, applying an adhesive, and curing it to obtain a wood fiber paper reinforced composite material; The method includes stacking and curing unidirectional wood fiber paper prepregs manufactured according to any one of claims 29 to 31, or according to the manufacturing method described in claim 32, to obtain a wood fiber paper reinforced composite material. A method for producing a wood fiber paper-reinforced composite material, characterized by the following:
38. This includes performing a shrinkage treatment in at least one direction on the aforementioned unidirectional wood grain; and according to the decomposition of forces, the shrinkage includes lateral shrinkage and thickness shrinkage. A method characterized by its application to unidirectional shrinkage of wood grain.
39. The unidirectional wood grain is chemically treated to remove partial material, followed by a shrinkage treatment in at least one direction. The method according to the feature of 38.
40. The aforementioned contraction includes lateral contraction and thickness contraction; the directions of the contraction forces of the lateral contraction and the thickness contraction intersect. The method according to the feature of 38.
41. The unidirectional wood grain comprises wood fibers and / or bundles of wood fibers; the wood fibers and / or bundles of wood fibers are microscopically arranged or extended along one direction as a whole; The contraction force of the lateral shrinkage is a force in the horizontal direction of the unidirectional wood grain, and a force that intersects in plane with the extension direction of the wood fibers and / or bundles of wood fibers in the unidirectional wood grain, and / or the contraction force of the thickness shrinkage is a force in the vertical direction of the unidirectional wood grain; The force in the horizontal direction and the force in the vertical direction are forces that are initially applied independently, and / or forces that are formed after the combination or decomposition of forces. The method according to the present invention, characterized by the present invention.
42. The thickness reduction treatment includes a hot press treatment under negative pressure conditions; The surface pressure of the aforementioned hot-pressure treatment is 0.1 to 60 MPa; and / or The temperature of the aforementioned heat and pressure treatment is 50°C to 150°C; and / or The duration of the aforementioned heat and pressure treatment is 0.5 to 20 minutes. The method according to the present invention, characterized by the present invention.
43. The material comprises: unidirectional wood fiber paper according to any one of claims 1 to 9; unidirectional wood fiber paper manufactured according to the manufacturing method according to any one of claims 10 to 28; unidirectional wood fiber paper prepreg according to any one of claims 29 to 31; unidirectional wood fiber paper prepreg manufactured according to the manufacturing method according to claim 32; wood fiber paper reinforced composite material according to any one of claims 33 to 36; and wood fiber paper reinforced composite material manufactured according to the manufacturing method according to claim 37. A hollow woody tube characterized by the following features.