Functional bamboo board
By using bamboo yellow surface as the outer surface of bamboo plywood and combining it with core layers of different structures, the problems of high cost and easy cracking of bamboo plywood have been solved, realizing the production of low-cost, high-strength bamboo boards that are not prone to cracking.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU ZHUANGYI FURNITURE CO LTD
- Filing Date
- 2025-05-08
- Publication Date
- 2026-06-16
AI Technical Summary
Existing bamboo plywood has shortcomings in balancing low cost and resistance to cracking. In particular, the dense bamboo fiber layer of flat-pressed bamboo plywood has poor water absorption and low shrinkage, making the board prone to cracking when the ambient humidity changes.
Bamboo yellow surface is used as the panel layer, and multiple tangentially processed bamboo strips are spliced in parallel to form the panel layer using adhesive. Different structural forms of the core layer (such as flat pressing, side pressing or wood-based panels) are then glued together to ensure the outer surface of the bamboo yellow layer and improve the strength of the board.
This technology enables low-cost bamboo board production while improving the stability and strength of the boards against changes in environmental temperature and humidity, thus preventing surface cracking.
Smart Images
Figure CN224360354U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of engineered composite panels, specifically to a functional bamboo panel. Background Technology
[0002] Currently, countries around the world are striving to achieve sustainable economic development through the utilization of renewable biological resources. my country possesses approximately 20% of the world's bamboo forest area, making it the country with the richest bamboo resources globally. Bamboo plants grow rapidly, are renewable, and have a wide range of uses, thus perfectly aligning with the needs of green development.
[0003] Bamboo is widely used in plywood manufacturing due to its short growth cycle, high strength, and renewability. There are two main bonding methods: flat pressing and side pressing. Flat pressing involves applying glue to the radial side of each bamboo strip and applying pressure. The surface of the board shows the tangential side of the bamboo, preserving the natural grain of the bamboo nodes. Because the tangential side of bamboo is relatively wide, the bamboo node grain is clearly visible. Side pressing involves applying glue to the tangential side of each bamboo strip and applying pressure. The surface of the board shows the radial side of the bamboo strip. Because the radial side of bamboo has limited thickness, more bamboo strips are needed to achieve the same width. The surface of the board displays the radial bamboo node grain, resulting in a finer grain.
[0004] Currently, side-pressed bamboo plywood on the market has better structural mechanical properties and is less prone to cracking, but its cost is as high as 116 yuan per square meter, which is very expensive. Flat-pressed bamboo plywood on the market typically has the bamboo green side facing outwards to enhance aesthetics, and its cost is as low as 88 yuan per square meter, offering better economic benefits. However, the bamboo green layer has dense fibers, poor water absorption, low shrinkage, high lignin content, and is brittle. When environmental humidity changes, interlayer stress concentration occurs, causing the plywood to crack along the bamboo green side after a certain period of use. Summary of the Invention
[0005] In view of the shortcomings of the prior art, the present invention provides a functional bamboo board to solve the problem that the existing bamboo plywood cannot simultaneously achieve low cost and easy cracking of the board surface.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A functional bamboo board includes a first panel layer and a second panel layer. The first panel layer and the second panel layer are glued together by applying adhesive and applying pressure. Both the first panel layer and the second panel layer are made by splicing multiple bamboo strips processed in the tangential direction in parallel along the width direction of the bamboo strips and gluing them together by flat pressing. The outer surfaces of the first panel layer and the second panel layer are the bamboo yellow side of the bamboo strips.
[0008] As a further improved technical solution, it also includes a core layer, which is bonded to the first panel layer and the second panel layer by applying adhesive and applying pressure.
[0009] As a preferred technical solution, the core layer is formed by splicing one or more bamboo strips in parallel along the width direction of the bamboo strips and gluing them together by flat pressing.
[0010] As another preferred technical solution, the core layer is formed by splicing multiple layers of bamboo strips in parallel along the thickness direction of the bamboo strips and gluing them together by side pressing.
[0011] As another preferred technical solution, the core layer is formed by arranging multiple bamboo strips in both the length and width directions of the core layer and bonding them together under pressure.
[0012] As a further preferred technical solution, the bamboo strip is cut from a board composed of bamboo strips, and the height of the bamboo strip is 4-30mm.
[0013] As another preferred technical solution, the core layer is a wood-based panel.
[0014] As a preferred technical solution, the bamboo strip has a thickness of 3-9mm and a width of 14-25mm.
[0015] As a preferred technical solution, the adhesive is MF (melamine-formaldehyde resin adhesive), PF (phenolic resin adhesive), EPI (isocyanate adhesive), PVAC (polyvinyl acetate emulsion adhesive), or PUR (polyurethane reactive hot melt adhesive).
[0016] Compared with the prior art, the main beneficial effects of this utility model are as follows:
[0017] This utility model discloses a functional bamboo board, which is glued together by flat pressing of bamboo strips. It has the advantage of lower cost compared to bamboo boards that are side-pressed on the market. At the same time, the outer surface of the bamboo board panel is only the bamboo yellow layer of the bamboo strips. The bamboo yellow layer has a loose structure, low shrinkage rate and good toughness, which makes the board surface more stable in resisting changes in environmental temperature and humidity, and thus less prone to cracking.
[0018] This utility model discloses a functional bamboo board material, which employs at least four structural forms of the core layer, effectively improving the strength of the board material.
[0019] This utility model discloses a functional bamboo board with a core layer of a third structural form. The bamboo fibers in the core layer are perpendicular to the board surface. When the force applied to the board surface is transmitted to the core layer, it is all along the direction of the bamboo fibers in the core layer. Because the cell structure of bamboo fibers is tightly and continuously arranged, it has a high elastic modulus and strength. Therefore, the bamboo fibers can work together to bear the load and effectively exert the maximum stress capacity of bamboo. Attached Figure Description
[0020] Figure 1 This is a perspective view of the functional bamboo board without a core layer according to this utility model;
[0021] Figure 2 This is a perspective view of the functional bamboo board with a core layer according to this utility model.
[0022] Figure 3 This is a three-dimensional exploded view of the functional bamboo board with a core layer according to this utility model.
[0023] Figure 4 This is a three-dimensional view of a functional bamboo board whose core layer is a single layer of flat-pressed board.
[0024] Figure 5 This is a three-dimensional view of a functional bamboo board whose core layer is a multi-layer flat-pressed board.
[0025] Figure 6 This is a three-dimensional view of a functional bamboo board whose core layer is a multi-layer side-pressed board.
[0026] Figure 7 This is a three-dimensional exploded view of a functional bamboo board whose core layer is a multi-layer side-pressed board.
[0027] Figure 8 This is a three-dimensional view of a functional bamboo board whose core layer is composed of multiple bamboo strips.
[0028] Figure 9 This is a three-dimensional exploded view of a functional bamboo board whose core layer is composed of multiple bamboo strips.
[0029] Reference numerals: 1 First panel layer, 2 Second panel layer, 3 Core layer, 31 Bamboo strip, 4 Bamboo strip. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] like Figure 1 As shown, a functional bamboo board includes a first panel layer 1 and a second panel layer 2. The first panel layer 1 and the second panel layer 2 are glued together by applying adhesive and applying pressure. Both the first panel layer 1 and the second panel layer 2 are made by splicing multiple bamboo strips 4 processed in the tangential direction in parallel along the width direction of the bamboo strips 4 and gluing them together by flat pressing. The outer surfaces of the first panel layer 1 and the second panel layer 2 are both the bamboo yellow surface of the bamboo strips 4.
[0032] The outer surfaces of both panels of this functional bamboo board are bamboo yellow layers. The bamboo yellow layer has a loose structure, low shrinkage rate, and good toughness, which makes the board surface more stable in resisting changes in environmental temperature and humidity. Therefore, the board surface is not easy to crack, thus achieving the technical effect of crack prevention.
[0033] To further improve the strength of the board, as a further improvement, such as Figure 2 , 3 As shown, a core layer 3 is also provided between the two panel layers. The core layer 3 is bonded to the first panel layer 1 and the second panel layer 2 by applying adhesive and applying pressure. The core layer 3 can be designed in at least four structural forms.
[0034] Specifically, the first structural form of the core layer 3 is as follows: Figure 4 As shown, the core layer 3 can be formed by splicing multiple bamboo strips 4 in parallel along the width direction of the bamboo strips 4 and gluing them together by flat pressing. The advantage of this specific embodiment is that the functional bamboo board is processed using uniform bamboo strips 4 as raw materials, which facilitates unified material preparation.
[0035] As a variation of the first structural form of the core layer 3, such as Figure 5 As shown, the core layer 3 can also be composed of multiple layers of bamboo strips 4 spliced parallel to each other along their width and glued together by flat pressing. The advantage of this specific embodiment is that the functional bamboo board is also processed using uniform bamboo strips 4 as raw materials, which facilitates unified material preparation. The number of layers of bamboo strips 4 can be increased according to the required thickness of the board, thereby improving the strength of the board.
[0036] Specifically, the second structural form of the core layer 3, such as... Figure 6 , 7 As shown, in order to further improve the strength of the board, the core layer 3 can also be made of multiple bamboo strips 4 spliced in parallel along the thickness direction of the bamboo strips 4 and glued together by side pressing.
[0037] Specifically, the third structural form of the core layer 3, such as... Figure 8 , 9As shown, the core layer 3 is composed of multiple bamboo strips 31 arranged along both the length and width of the core layer 3 and bonded together under pressure. The bamboo strips 31 can be cut from a board composed of bamboo strips 4, and the height of the bamboo strips 31 is preferably 4-30mm. This structural form ensures that the height direction of the bamboo strips 31 is entirely along the fiber direction of the bamboo. Like the reinforcing bars in reinforced concrete, the cellular structure of bamboo fibers is tightly and continuously arranged axially, possessing high elastic modulus and strength. When the force applied to the bamboo board is transmitted to the core layer 3, it is all along the height direction of the bamboo strips 31, i.e., the fiber direction of the bamboo strips 31. The bamboo fibers can work together to share the load, effectively maximizing the load-bearing capacity of the bamboo.
[0038] To reduce raw material and processing costs, the core layer 3 can also be a conventional wood-based composite board available on the market.
[0039] Preferably, the bamboo strips used in the above embodiments have a thickness of 3-9 mm and a width of 14-25 mm.
[0040] Preferably, the adhesives used in the above embodiments are MF (melamine-formaldehyde resin adhesive), PF (phenolic resin adhesive), EP I (isocyanate adhesive), PVAC (polyvinyl acetate emulsion adhesive), or PUR (polyurethane reactive hot melt adhesive).
[0041] The production and processing steps of this functional bamboo board are as follows:
[0042] S1. Bamboo strip preparation: Take moso bamboo that has grown for more than four years and process it into bamboo strips with equal thickness at both ends through processes such as tangential cutting, splitting, removing nodes, boiling to soften, flattening, thickness determination, drying, and milling. According to the required size of bamboo boards, remove the inner and outer nodes, cut, split, and rough plan the strips to make rough planed strips that are split along the tangential direction. Remove some of the bamboo green and bamboo yellow parts. The shape can be dotted, sheet-like, straight, curved, or other irregular shapes, or one or more of them. The rough planed strips are steam carbonized and dried. The dried rough planed strips are then finely planed to make fine planed strips.
[0043] S2. Adhesive coating treatment: The above-mentioned fine planing strips are coated with adhesives such as MF (melamine formaldehyde resin glue), PF (phenolic resin glue), EPI (isocyanate glue), PVAC (polyvinyl acetate emulsion glue), or PUR (polyurethane reactive hot melt adhesive).
[0044] S3. Hot pressing of panel layer: According to the specifications of the board, the flat pressing method is adopted. Each layer of bamboo board contains at least two bamboo strips. The strips are pressed together along the width direction until they are tightly connected. There is a sandwich and adhesive between each pair of bamboo strips. Hot pressing is used for forming.
[0045] S4. Composite Board Bonding: After the bamboo boards formed by the face layer and core layer 3 are stacked in a crisscross pattern, the outer surfaces of the top and bottom surfaces contain only the yellow bamboo surface and not the green bamboo surface. Adhesive is used between adjacent layers of the face layer and core layer 3, and pressure is applied along the thickness direction of the bamboo strips. The layers are then hot-pressed to form a tight bond, creating a high-strength bamboo board with crack resistance. The core layer 3 can be a flat-pressed or side-pressed bamboo board, or it can be made by cutting bamboo strips into strips, using multiple strips, and pressing and gluing them together, ensuring that the bamboo fibers are perpendicular to the board surface. It can also be a wood or other artificial composite board, and can be a single layer or multiple layers stacked in a crisscross pattern.
[0046] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0047] This utility model discloses a functional bamboo board, which is glued together by flat pressing of bamboo strips. Compared with bamboo boards formed by side pressing on the market, it has the advantage of lower cost and ensures the strength of the board. At the same time, the outer surface of the bamboo board panel is only the bamboo yellow layer of the bamboo strips. The bamboo yellow layer has a loose structure, low shrinkage rate and good toughness, which makes the board surface more stable in resisting changes in environmental temperature and humidity, making the board surface less prone to cracking, thus achieving the technical effect of crack prevention.
[0048] This utility model discloses a functional bamboo board material, which employs at least four structural forms of the core layer, effectively improving the strength of the board material.
[0049] This utility model discloses a functional bamboo board with a core layer of a third structural form. The bamboo fibers in the core layer are perpendicular to the board surface. When the force applied to the board surface is transmitted to the core layer, it is all along the direction of the bamboo fibers in the core layer. Because the cell structure of bamboo fibers is tightly and continuously arranged, it has a high elastic modulus and strength. Therefore, the bamboo fibers can work together to bear the load and effectively exert the maximum stress capacity of bamboo.
[0050] In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.
[0051] In this document, the directional terms such as front, back, top, bottom, left, right, top, and bottom are defined according to the positions of the components in the accompanying drawings and the positions between the components, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.
[0052] Where there is no conflict, the above embodiments and features described herein can be combined with each other.
Claims
1. A functional bamboo board, characterized in that, It includes a first panel layer (1) and a second panel layer (2). The first panel layer (1) and the second panel layer (2) are glued together by applying adhesive and applying pressure. The first panel layer (1) and the second panel layer (2) are both made of multiple tangentially processed bamboo strips (4) spliced in parallel along the width direction of the bamboo strips (4) and glued together by flat pressing. The outer surfaces of the first panel layer (1) and the second panel layer (2) are the bamboo yellow surface of the bamboo strips (4).
2. The functional bamboo board according to claim 1, characterized in that, It also includes a core layer (3), which is bonded to the first panel layer (1) and the second panel layer (2) by applying an adhesive and applying pressure.
3. A functional bamboo board according to claim 2, characterized in that, The core layer (3) is formed by splicing one or more bamboo strips (4) in parallel along the width direction of the bamboo strips (4) and gluing them together by flat pressing.
4. A functional bamboo board according to claim 2, characterized in that, The core layer (3) is formed by splicing multiple layers of bamboo strips (4) in parallel along the thickness direction of the bamboo strips (4) and gluing them together by side pressing.
5. A functional bamboo board according to claim 2, characterized in that, The core layer (3) is formed by arranging multiple bamboo strips (31) in both the length and width directions of the core layer (3) and bonding them together under pressure.
6. A functional bamboo board according to claim 5, characterized in that, The bamboo strip (31) is formed by cutting a board made of bamboo strips (4), and the height of the bamboo strip (31) is 4-30mm.
7. A functional bamboo board according to claim 2, characterized in that, The core layer (3) is a wood-based engineered wood panel.
8. A functional bamboo board according to any one of claims 1-7, characterized in that, The bamboo strips are 3-9mm thick and 14-25mm wide.
9. A functional bamboo board according to claim 8, characterized in that, The adhesive is melamine-formaldehyde resin glue, phenolic resin glue, isocyanate glue, polyvinyl acetate emulsion glue, or polyurethane reactive hot melt adhesive.