Low-temperature-resistant high-strength waterproof environmental protection plywood for LNG ship
By using a three-layer veneer structure and a multi-layer foamed insulation layer design, combined with phenolic resin adhesive and polyurethane foam layer, the problems of low temperature resistance, waterproofing and heat insulation of plywood on LNG ships are solved, achieving high strength and stable insulation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 弘瑞力丰复合材料(沭阳)有限公司
- Filing Date
- 2026-04-25
- Publication Date
- 2026-06-05
AI Technical Summary
Existing plywood has poor low-temperature resistance, insufficient waterproofing, difficulty in effective thermal insulation, and insufficient structural strength and stability in LNG ship applications.
It adopts a three-layer single-layer structure, combining phenolic resin adhesive and polyurethane foam layer, with glass wool insulation reinforcement layer and perlite particles to form a multi-layer foamed insulation layer and insulation particles, which enhances low temperature resistance, waterproof and heat insulation performance.
It improves the low-temperature resistance, waterproofing and thermal insulation of plywood, ensures structural strength and stability, reduces heat transfer, lowers energy consumption, and adapts to the low-temperature environment of LNG ships.
Smart Images
Figure CN122143438A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of plywood, and more particularly to a low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships. Background Technology
[0002] An LNG carrier requires tens of thousands of insulation boxes, which are installed between the steel plates of the cargo hold to provide thermal insulation and maintain the low-temperature environment of the cargo hold.
[0003] In the prior art, the invention patent with application number 2025100225643 discloses an installation method for the liquid dome insulation box of an LNG ship containment system. The method involves connecting the insulation box and the liquid dome section with screws, and separating and connecting the insulation box and the liquid dome section with a hand chain hoist. Finally, the insulation box is installed on the liquid dome section to achieve the containment of the liquid dome.
[0004] To reduce weight and cost, insulation boxes can be made of plywood. Plywood has low shrinkage, a smooth surface, and is not easily deformed, making it suitable for applications in aircraft, ships, trains, and construction. However, ordinary plywood has poor low-temperature resistance, particularly in terms of thermal insulation. Furthermore, ordinary plywood has poor waterproofing and limited environmental adaptability, necessitating improvements. Summary of the Invention
[0005] The purpose of this invention is to provide a low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships, which improves low-temperature resistance, waterproofing, and heat insulation, while ensuring structural strength and stability.
[0006] To achieve this objective, the present invention adopts the following technical solution: A low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships includes: a first veneer, a second veneer, a third veneer, a first heat-insulating reinforcement layer, a second heat-insulating reinforcement layer, and an isolation layer. The first veneer is disposed above the second veneer, and the third veneer is disposed below the second veneer. A first foamed insulation layer is disposed on the top surface of the first veneer. The first heat-insulating reinforcement layer is disposed on the first foamed insulation layer, and a second foamed insulation layer is disposed above the first heat-insulating reinforcement layer. The isolation layer includes heat-insulating particles dispersed on the first heat-insulating reinforcement layer, with the top of the heat-insulating particles extending upward to above the second foamed insulation layer. A third foamed insulation layer is disposed on the bottom surface of the third veneer, and the second heat-insulating reinforcement layer is disposed on the bottom surface of the third foamed insulation layer. A fourth foamed insulation layer is disposed on the bottom surface of the second heat-insulating reinforcement layer.
[0007] The first and second heat insulation reinforcement layers are made of glass wool.
[0008] The heat-insulating particles are made of perlite particles.
[0009] A first adhesive layer is provided between the first single board and the second single board, and a second adhesive layer is provided between the third single board and the second single board.
[0010] The first adhesive layer and the second adhesive layer are respectively made of phenolic resin adhesive.
[0011] The top of the heat-insulating particles is flush with the ground.
[0012] The first heat insulation layer is provided with an array of first connecting holes, and a first foam filler is provided in the first connecting hole to connect the first foam insulation layer and the second foam insulation layer.
[0013] The second heat insulation layer is provided with a second connection hole array, and a second foam filler is provided in the second connection hole to connect the third foam insulation layer and the fourth foam insulation layer.
[0014] The first foamed insulation layer, the second foamed insulation layer, the first foamed filler, the third foamed insulation layer, the fourth foamed insulation layer, and the second foamed filler adopt an integrated polyurethane foam structure.
[0015] The diameter of the first connecting hole is smaller than the particle size of the heat insulation particles.
[0016] The beneficial effects of this invention are as follows: A low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships is specially designed with a first, second, third, and fourth foamed insulation layer on its surface, which improves the low-temperature resistance and waterproof performance of both sides. The first and second heat-insulating reinforcement layers are used for heat insulation, further enhancing the heat insulation effect and ensuring structural strength and stability. The resulting insulation box can reduce the contact area with external facilities (such as liquid domes) after construction by using the isolation layer, thereby reducing heat transfer and further enhancing the heat insulation performance. This is beneficial for maintaining the low-temperature environment of the LNG ship's cargo hold and reducing energy consumption. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 A magnified view of part A in the middle; Figure 3 yes Figure 1 A magnified view of part B in the middle section. Detailed Implementation
[0018] The following is combined with Figures 1 to 3 The technical solution of the present invention will be further illustrated through specific embodiments.
[0019] like Figures 1-3 The low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships shown includes: a first veneer 1, a second veneer 2, a third veneer 3, a first heat insulation reinforcement layer 10, a second heat insulation reinforcement layer 15, and an isolation layer. The first veneer 1 is positioned above the second veneer 2, and the third veneer 3 is positioned below the second veneer 2. The three-layer veneer composite structure ensures structural strength.
[0020] A first adhesive layer 4 is disposed between the first single-layer board 1 and the second single-layer board 2 to bond the first single-layer board 1 and the second single-layer board 2. A second adhesive layer 5 is disposed between the third single-layer board 3 and the second single-layer board 2 to bond the third single-layer board 3 and the second single-layer board 2. In this embodiment, the first adhesive layer 4 and the second adhesive layer 5 are respectively made of phenolic resin, which has high chemical stability and is more environmentally friendly than urea-formaldehyde resin.
[0021] like Figure 2 As shown, a first foamed insulation layer 11 is provided on the top surface of the first single panel 1. The first foamed insulation layer 11 is constructed after the top surface of the first single panel 1 is roughened to ensure the strength of the bonded structure. A first thermal insulation reinforcement layer 10 is provided on the first foamed insulation layer 11, and a second foamed insulation layer 7 is provided above the first thermal insulation reinforcement layer 10 to provide multi-layer thermal insulation.
[0022] A first connecting hole 8 is arrayed on the first heat insulation reinforcement layer 10. A first foam filler 9 is provided in the first connecting hole 8 to connect the first foam insulation layer 11 and the second foam insulation layer 7, so as to ensure structural stability and avoid detachment problems.
[0023] like Figure 1 As shown, the insulation layer includes insulating particles 6 dispersed on the first heat insulation reinforcement layer 10. In this embodiment, the top of the insulating particles 6 extends upward to the top of the second foamed insulation layer 7. The insulation box can use the insulating particles 6 to reduce the contact area with external facilities (such as liquid domes) after construction, thereby reducing heat transfer and energy consumption.
[0024] In addition, the diameter of the first connecting hole 8 is smaller than the particle size of the heat insulation particles 6, which prevents the heat insulation particles 6 from entering the first connecting hole 8 and facilitates construction.
[0025] In this embodiment, the heat-insulating particles 6 are perlite particles. Perlite particles have a porous structure, effectively blocking heat transfer and possessing excellent thermal insulation performance, while also being lightweight and environmentally friendly. Figure 2 As shown, the top of the heat-insulating particles 6 is flush with the top. The heat-insulating particles 6 can be positioned by a mold or by machining to ensure that the top of the heat-insulating particles 6 is flush with the top, thus ensuring the flatness of the plywood when in contact with the liquid dome or other steel plates.
[0026] like Figure 3 As shown, the bottom surface of the third veneer 3 is provided with a third foamed insulation layer 12, the second heat insulation reinforcement layer 15 is provided on the bottom surface of the third foamed insulation layer 12, and the bottom surface of the second heat insulation reinforcement layer 15 is provided with a fourth foamed insulation layer 16. The first foamed insulation layer 11, the second foamed insulation layer 7, the third foamed insulation layer 12 and the fourth foamed insulation layer 16 improve the low temperature resistance and waterproof performance of the plywood on both sides.
[0027] In this embodiment, the first heat insulation reinforcement layer 10 and the second heat insulation reinforcement layer 15 are respectively made of glass wool. The first heat insulation reinforcement layer 10 and the second heat insulation reinforcement layer 15 can perform heat insulation and heat preservation, further improving the heat insulation and heat preservation effect.
[0028] A second connecting hole 13 is arrayed on the second heat insulation reinforcement layer 15. A second foam filler 14 is provided in the second connecting hole 13 to connect the third foam insulation layer 12 and the fourth foam insulation layer 16, so as to avoid the separation of the third foam insulation layer 12 and the fourth foam insulation layer 16 and the structure is stable.
[0029] In this embodiment, the first foamed insulation layer 11, the second foamed insulation layer 7, the first foamed filler 9, the third foamed insulation layer 12, the fourth foamed insulation layer 16, and the second foamed filler 14 adopt an integrated polyurethane foam structure, which can be molded into a single unit, resulting in high production efficiency and good thermal insulation performance. Furthermore, polyurethane foam can be used in a temperature range of -196℃ to 120℃, exhibiting good adaptability to the low-temperature environment of LNG carrier cargo holds. The resulting insulation box is beneficial for the thermal insulation of LNG carrier cargo holds and reduces energy consumption.
[0030] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.
Claims
1. A low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships, characterized in that: include: The system comprises a first veneer, a second veneer, a third veneer, a first heat insulation reinforcement layer, a second heat insulation reinforcement layer, and an isolation layer. The first veneer is positioned above the second veneer, and the third veneer is positioned below the second veneer. A first foamed insulation layer is provided on the top surface of the first veneer. The first heat insulation reinforcement layer is positioned on the first foamed insulation layer, and a second foamed insulation layer is positioned above the first heat insulation reinforcement layer. The isolation layer includes heat insulation particles dispersed on the first heat insulation reinforcement layer, with the top of the heat insulation particles extending upwards above the second foamed insulation layer. A third foamed insulation layer is provided on the bottom surface of the third veneer. The second heat insulation reinforcement layer is positioned on the bottom surface of the third foamed insulation layer, and a fourth foamed insulation layer is provided on the bottom surface of the second heat insulation reinforcement layer.
2. The low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships according to claim 1, characterized in that, The first and second heat insulation reinforcement layers are made of glass wool.
3. The low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships according to claim 1, characterized in that, The heat-insulating particles are perlite particles.
4. The low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships according to claim 1, characterized in that, A first adhesive layer is provided between the first veneer and the second veneer, and a second adhesive layer is provided between the third veneer and the second veneer.
5. The low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships according to claim 4, characterized in that, The first adhesive layer and the second adhesive layer are respectively made of phenolic resin adhesive.
6. The low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships according to claim 1, characterized in that, The top of the heat-insulating particles is flush with the ground.
7. The low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships according to claim 1, characterized in that, The first heat insulation reinforcement layer is provided with an array of first connecting holes, and a first foam filler is provided in the first connecting hole to connect the first foam insulation layer and the second foam insulation layer.
8. The low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships according to claim 7, characterized in that, The second heat insulation layer is provided with a second connection hole array, and a second foam filler is provided in the second connection hole to connect the third foam insulation layer and the fourth foam insulation layer.
9. The low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships according to claim 8, characterized in that, The first foam insulation layer, the second foam insulation layer, the first foam filler, the third foam insulation layer, the fourth foam insulation layer, and the second foam filler adopt an integrated polyurethane foam structure.
10. The low-temperature resistant, high-strength, waterproof, environmentally friendly plywood for LNG ships according to claim 7, characterized in that, The diameter of the first connecting hole is smaller than the particle size of the heat insulation particles.