Lightweight bottom plate, preparation process thereof and heat preservation box applying bottom plate
By adopting a combined structure of thermoplastic plate layer, PET layer, FRP layer and insulation layer on the base plate of the refrigeration box, and injecting structural glue on the thermoplastic plate layer, the problems of large weight and insufficient structural strength of the traditional refrigeration box are solved, and a refrigeration box with light weight, high strength and good insulation performance are achieved.
Patent Information
- Application Number
- CN202510366362.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2025-05-30
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Due to the large weight of traditional refrigerators, they lead to high transportation costs and high energy consumption. At the same time, the structural strength is insufficient during the lightweight process and cannot fully meet the actual needs.
A lightweight bottom plate consisting of a thermoplastic plate layer, a PET layer and a FRP layer is used to open a glue injection groove on the thermoplastic plate layer and fill structural glue to enhance the strength of the thermoplastic plate layer. The PET layer improves bending resistance and uses the insulation layer to improve the insulation performance.
It realizes the lightweight of the refrigerator, improves structural strength and insulation performance, reduces transportation costs and energy consumption, and meets actual needs.
Smart Images
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Abstract
Description
Technical Field
[0001] This application relates to the technical field of incubator materials, and in particular to a lightweight bottom plate, its preparation process, and an incubator using the bottom plate. Background Art
[0002] As the core equipment for cold chain transportation, the heat preservation performance and structural strength of refrigerators directly affect the freshness preservation effect of goods and the transportation efficiency. Traditional refrigerators mostly use wooden structures and plywood materials. Although they have good heat preservation performance, they are relatively heavy, resulting in high transportation costs and large energy consumption. With the increasing requirements of the logistics industry for efficiency and environmental protection, lightweight refrigerators have become the trend of technological development. In recent years, some lightweight refrigerators have emerged on the market, but they have problems such as insufficient structural strength during the process of lightweighting, and cannot fully meet the actual needs. Summary of the Invention
[0003] In order to improve the structural strength of lightweight refrigerators, this application provides a lightweight bottom plate, its preparation process, and an incubator using the bottom plate.
[0004] In the first aspect, a lightweight bottom plate provided by this application adopts the following technical solution: A lightweight bottom plate includes a thermoplastic plate layer, a PET layer, and an FRP layer arranged in sequence. A laminated wood is connected between the PET layer and the FRP layer, and a heat preservation layer is arranged between adjacent laminated woods; a glue injection groove is formed on the thermoplastic plate layer, and the glue injection groove is filled with structural glue.
[0005] By adopting the above technical solution, the thermoplastic plate layer is light, and a glue injection groove is formed and filled with structural glue, which improves the strength of the thermoplastic plate layer. The PET layer enhances the anti-bending performance of the bottom plate, and then the heat preservation layer is used, so that the obtained refrigerator has both good heat preservation performance and good structural strength.
[0006] In a specific feasible implementation scheme, the raw materials of the structural glue include the following components in parts by weight: 90 - 110 parts of polyol polymer, 110 - 120 parts of MDI, 4 - 6 parts of modified reinforcing material, 6 - 8 parts of toughening material, 0.05 - 0.1 part of catalyst, and 1 - 2 parts of thixotropic agent.
[0007] By adopting the above technical solution, adding a modified reinforcing material and a toughening material to the polyurethane structural glue can improve the strength of the obtained thermoplastic plate layer.
[0008] In a specific feasible implementation scheme, the polyol polymer includes poly(ε-caprolactone)diol.
[0009] In a specific feasible implementation scheme, the preparation method of the modified reinforcing material includes the following steps: Add nano-graphene, nano-silica, and silane coupling agent into ethanol, perform ultrasonic dispersion, and then dry to obtain a modified reinforcing material; the weight ratio of the nano-graphene, the nano-silica, the silane coupling agent, and the ethanol is (0.5 - 1.5):(3 - 5):(1 - 2):18.
[0010] In a specific feasible embodiment, the preparation method of the toughening material includes the following steps: Dissolve the block polyurethane ionomer in acetone to obtain a treatment liquid; Immerse the chopped aramid pulp and hydroxylated carbon nanotubes in the treatment liquid, take them out after ultrasonic oscillation, and dry to obtain the toughening material.
[0011] By adopting the above technical solution, the nano-graphene and nano-silica are modified by the silane coupling agent, improving the dispersion performance of the nano-graphene and nano-silica; the block polyurethane ionomer modifies the chopped aramid pulp and hydroxylated carbon nanotubes, also improving the dispersion performance of the chopped aramid pulp and hydroxylated carbon nanotubes. The nano-silica improves the strength of the thermoplastic board, and the nano-graphene, chopped aramid pulp, and hydroxylated carbon nanotubes can construct a reinforcing system to synergistically enhance the impact resistance and creep resistance; the silane coupling agent and the ionomer cooperate to reduce the stress concentration at the interface between the thermoplastic board and the colloid.
[0012] In a specific feasible embodiment, the preparation method of the structural adhesive includes the following steps: First, heat and stir the polyol polymer, then add a thixotropic agent and stir to obtain a polyol polymer system A; Under vacuum conditions, first add the modified reinforcing material into the polyol polymer system A, stir and mix, then add the toughening material and stir and mix to obtain a polyol polymer system B; Preheat the MDI first, then add it into the polyol polymer system B, shear and mix, and finally add a catalyst, stir and react, and perform vacuum degassing to obtain the structural adhesive.
[0013] In a specific feasible embodiment, the material of the thermal insulation layer is XPS material or PU.
[0014] In a second aspect, a preparation process of a lightweight bottom plate provided by this application adopts the following technical solution: A preparation process of a lightweight bottom plate includes the following steps: Glue injection: First, open a glue injection groove on the thermoplastic board, then preheat, and then inject the structural adhesive into the glue injection groove to obtain a thermoplastic board layer; Plate making: First, several layers of laminated wood are laminated on the FRP layer, and then heat-insulating materials are filled between adjacent laminated woods to obtain a heat-insulating layer. Then, a PET layer and a thermoplastic plate layer are sequentially laminated on the laminated wood to obtain a lightweight bottom plate.
[0015] By adopting the above technical solution, first, slots are cut on the thermoplastic plate, then preheated, and glue is injected to obtain the thermoplastic plate layer. Then, several layers of laminated wood are laminated on the FRP layer, and heat-insulating materials are filled to obtain a heat-insulating layer. Then, a PET layer and a thermoplastic plate layer are sequentially laminated on the laminated wood to obtain a lightweight bottom plate.
[0016] In a third aspect, a thermal insulation box provided by the present application adopts the following technical solution: A thermal insulation box includes the lightweight bottom plate and side plates described above.
[0017] By adopting the above technical solution, the thermal insulation box obtained by using the lightweight bottom plate in the present application not only has a good heat insulation effect, but also is light and has high strength.
[0018] In a specific feasible implementation, the side plates include thermoplastic plate layers and FRP layers arranged oppositely, laminated wood is connected between the thermoplastic plate layer and the FRP layer, and a heat-insulating layer is arranged between adjacent laminated woods.
[0019] In summary, the present application includes at least one of the following beneficial technical effects: 1. The thermoplastic plate layer in the present application is light, and glue injection grooves are opened, and structural glue is filled in the glue injection grooves, which improves the strength of the thermoplastic plate layer. The PET layer enhances the anti-bending performance of the bottom plate, and then the heat-insulating layer is used, so that the obtained refrigerated box has both good heat insulation performance and good structural strength; 2. In the process of the present application, first, slots are cut on the thermoplastic plate, then preheated, and glue is injected to obtain the thermoplastic plate layer. Then, several layers of laminated wood are laminated on the FRP layer, and heat-insulating materials are filled to obtain a heat-insulating layer. Then, a PET layer and a thermoplastic plate layer are sequentially laminated on the laminated wood to obtain a lightweight bottom plate; 3. The thermal insulation box in the present application is made of the lightweight bottom plate in the present application, and not only has a good heat insulation effect, but also is light and has high strength. Description of the Drawings
[0020] Figure 1 is a cross-sectional schematic diagram for reflecting the lightweight bottom plate in Embodiment 1 of the present application.
[0021] Figure 2 is a cross-sectional schematic diagram for reflecting the lightweight bottom plate in Embodiment 4 of the present application.
[0022] Figure 3 is a cross-sectional schematic diagram for reflecting the side plate in Application Example 1 of the present application.
[0023] Description of reference numerals: 1. thermoplastic plate layer; 11. glue injection groove; 12. structural adhesive; 2. PET layer; 3. FRP layer; 4. laminated wood; 5. thermal insulation layer; 6. aluminum guide rail. Specific embodiments
[0024] The present application will be further described in detail below in conjunction with embodiments.
[0025] All raw materials in the embodiments can be obtained commercially. Among them, the silane coupling agent is γ-aminopropyltriethoxysilane; the length of the chopped aramid pulp is 0.2 - 0.5 mm; the diameter of the hydroxylated carbon nanotubes is 10 - 20 nm; the block polyurethane ionomer is The ionomer-modified TPU in the series.
[0026] Preparation examples Preparation example 1 Preparation example 1 provides a preparation method of a structural adhesive, including the following steps: Add nano-graphene, nano-silica, and silane coupling agent into ethanol, perform ultrasonic dispersion for 30 min, dry at 60 °C for 2 h, and pass through a 200-mesh sieve to obtain a modified reinforcing material; the weight ratio of nano-graphene, nano-silica, silane coupling agent, and ethanol is 0.5:3:1:18; Dissolve the block polyurethane ionomer in acetone to obtain a treatment solution; the weight ratio of the block polyurethane ionomer to acetone is 1:5; Immerse the chopped aramid pulp and hydroxylated carbon nanotubes in the treatment solution, take them out after ultrasonic oscillation for 10 min, and dry at 80 °C for 2 h to obtain a toughened material; the weight ratio of the chopped aramid pulp, hydroxylated carbon nanotubes, and block polyurethane ionomer is 6.5:1.5:4; First, heat and stir 90 kg of polyol polymer at 62 °C at a rotation speed of 500 rpm for 10 min, then add 1 kg of thixotropic agent and stir at a rotation speed of 2000 rpm for 20 min to obtain a polyol polymer system A; the polyol polymer is poly(ε-caprolactone)diol; the thixotropic agent is polyamide wax; Under a vacuum condition of -0.05 MPa, first add 4 kg of the modified reinforcing material to the polyol polymer system A, stir and mix at 62 °C at a rotation speed of 100 rpm for 15 min, then add 6 kg of the toughened material and stir and mix at a rotation speed of 300 rpm for 10 min to obtain a polyol polymer system B; Preheat 110 kg of MDI at 30 °C first, then add it to the polyol polymer system B, shear and mix at 75 °C with a rotation speed of 800 rpm, and finally add 0.05 kg of catalyst, stir and react at 400 rpm for 2 min, and perform vacuum degassing to obtain the structural adhesive; the catalyst is bis(morpholino)diethyl ether.
[0027] Preparation Example 2 Preparation Example 2 provides a method for preparing a structural adhesive, including the following steps: Add nano-graphene, nano-silica, and silane coupling agent to ethanol, perform ultrasonic dispersion for 30 min, dry at 60 °C for 2 h, and pass through a 200-mesh sieve to obtain the modified reinforcing material; the weight ratio of nano-graphene, nano-silica, silane coupling agent, and ethanol is 1:4:1.5:18; Dissolve the block polyurethane ionomer in acetone to obtain the treatment liquid; the weight ratio of the block polyurethane ionomer to acetone is 1:5; Immerse the chopped aramid pulp and hydroxylated carbon nanotubes in the treatment liquid, take them out after ultrasonic oscillation for 10 min, and dry at 80 °C for 2 h to obtain the toughening material; the weight ratio of chopped aramid pulp, hydroxylated carbon nanotubes, and block polyurethane ionomer is 6.5:1.5:4; First, heat and stir 100 kg of polyol polymer at 62 °C with a rotation speed of 500 rpm for 10 min, then add 1.5 kg of thixotropic agent, and stir at 2000 rpm for 20 min to obtain the polyol polymer system A; the polyol polymer is poly(ε-caprolactone)diol; the thixotropic agent is polyamide wax; Under a vacuum condition of -0.05 MPa, first add 5 kg of modified reinforcing material to the polyol polymer system A, stir and mix at 62 °C with a rotation speed of 100 rpm for 15 min, and then add 7 kg of toughening material, and stir and mix at 300 rpm for 10 min to obtain the polyol polymer system B; Preheat 115 kg of MDI at 30 °C first, then add it to the polyol polymer system B, shear and mix at 75 °C with a rotation speed of 800 rpm, and finally add 0.07 kg of catalyst, stir and react at 400 rpm for 2 min, and perform vacuum degassing to obtain the structural adhesive; the catalyst is bis(morpholino)diethyl ether.
[0028] Preparation Example 3 Preparation Example 3 provides a method for preparing a structural adhesive, including the following steps: Add nano-graphene, nano-silica, and silane coupling agent into ethanol, perform ultrasonic dispersion for 30 min, dry at 60 °C for 2 h, and pass through a 200-mesh sieve to obtain a modified reinforcing material; the weight ratio of nano-graphene, nano-silica, silane coupling agent, and ethanol is 1.5:5:2:18; Dissolve block polyurethane ionomer in acetone to obtain a treatment liquid; the weight ratio of block polyurethane ionomer to acetone is 1:5; Immerse chopped aramid pulp and hydroxylated carbon nanotubes in the treatment liquid, take them out after ultrasonic oscillation for 10 min, and dry at 80 °C for 2 h to obtain a toughening material; the weight ratio of chopped aramid pulp, hydroxylated carbon nanotubes, and block polyurethane ionomer is 6.5:1.5:4; First, heat and stir 110 kg of polyol polymer at 62 °C at a rotation speed of 500 rpm for 10 min, then add 2 kg of thixotropic agent and stir at a rotation speed of 2000 rpm for 20 min to obtain polyol polymer system A; the polyol polymer is poly(ε-caprolactone) diol; the thixotropic agent is polyamide wax; Under a vacuum condition of -0.05 MPa, first add 6 kg of modified reinforcing material into polyol polymer system A, stir and mix at 62 °C at a rotation speed of 100 rpm for 15 min, then add 8 kg of toughening material and stir and mix at a rotation speed of 300 rpm for 10 min to obtain polyol polymer system B; Preheat 120 kg of MDI at 30 °C first, then add it into polyol polymer system B, shear and mix at 75 °C at a rotation speed of 800 rpm, and finally add 0.1 kg of catalyst and stir and react at a rotation speed of 400 rpm for 2 min, and perform vacuum degassing to obtain structural adhesive; the catalyst is bis(morpholino)diethyl ether. Example
[0029] Example 1 Example 1 provides a lightweight bottom plate.
[0030] Refer to Figure 1 , a lightweight bottom plate, including a thermoplastic plate layer 1, a PET layer 2, and an FRP layer 3 arranged in sequence. There are several laminated woods 4 connected between the PET layer 2 and the FRP layer 3, and a heat insulation layer 5 is arranged between two adjacent laminated woods 4; a glue injection groove 11 is formed on the thermoplastic plate layer 1, and a structural adhesive 12 is filled in the glue injection groove 11.
[0031] Example 1 Example 1 also provides a preparation process for a lightweight bottom plate.
[0032] A preparation process for a lightweight bottom plate includes the following steps: Glue injection: First, create a glue injection groove 11 on the thermoplastic board, then preheat it at 40°C, and then inject the structural adhesive 12 in Preparation Example 1 into the glue injection groove 11 to obtain the thermoplastic board layer 1; the thickness of the thermoplastic board layer 1 can be 1 - 2 cm, and in this embodiment, it is 1 cm; Board making: First, laminate several layers of laminated wood 4 on the FRP layer 3, then fill the heat insulation material between two adjacent laminated woods 4 to obtain the heat insulation layer 5, and then sequentially laminate the PET layer 2 and the thermoplastic board layer 1 on the laminated wood 4 to obtain the lightweight bottom plate; the thickness of the laminated wood 4 is 6 cm; the thickness of the PET layer 2 can be 1 - 2 cm, and in this embodiment, it is 1 cm; the thickness of the FRP layer 3 is 1 cm; the material of the heat insulation layer 5 can be XPS material or PU; in this embodiment, it is XPS material.
[0033] Example 2 The difference between Example 2 and Example 1 lies in: A preparation process for a lightweight bottom plate, including the following steps: Glue injection: First, create a glue injection groove 11 on the thermoplastic board, then preheat it at 40°C, and then inject the structural adhesive 12 in Preparation Example 2 into the glue injection groove 11 to obtain the thermoplastic board layer 1; the thickness of the thermoplastic board layer 1 can be 1 - 2 cm, and in this embodiment, it is 1 cm; Board making: First, laminate several layers of laminated wood 4 on the FRP layer 3, then fill the heat insulation material between two adjacent laminated woods 4 to obtain the heat insulation layer 5, and then sequentially laminate the PET layer 2 and the thermoplastic board layer 1 on the laminated wood 4 to obtain the lightweight bottom plate; the thickness of the laminated wood 4 is 6 cm; the thickness of the PET layer 2 can be 1 - 2 cm, and in this embodiment, it is 1 cm; the thickness of the FRP layer 3 is 1 cm; the material of the heat insulation layer 5 can be XPS material or PU; in this embodiment, it is XPS material; the rest is the same as in Example 1.
[0034] Example 3 The difference between Example 3 and Example 1 lies in: A preparation process for a lightweight bottom plate, including the following steps: Glue injection: First, create a glue injection groove 11 on the thermoplastic board, then preheat it at 40°C, and then inject the structural adhesive 12 in Preparation Example 3 into the glue injection groove 11 to obtain the thermoplastic board layer 1; the thickness of the thermoplastic board layer 1 can be 1 - 2 cm, and in this embodiment, it is 1 cm; Plate making: First, several layers of laminated wood 4 are laminated on the FRP layer 3, and then heat-insulating materials are filled between two adjacent laminated woods 4 to obtain the heat-insulating layer 5. Then, the PET layer 2 and the thermoplastic plate layer 1 are sequentially laminated on the laminated wood 4 to obtain the lightweight bottom plate. The thickness of the laminated wood 4 is 6 cm; the thickness of the PET layer 2 can be 1-2 cm, and in this embodiment, it is 1 cm; the thickness of the FRP layer 3 is 1 cm; the material of the heat-insulating layer 5 can be XPS material or PU; in this embodiment, it is XPS material; the rest is the same as in Embodiment 1.
[0035] Embodiment 4 Embodiment 4 provides a lightweight bottom plate.
[0036] Refer to Figure 2 , a lightweight bottom plate, including a thermoplastic plate layer 1, a PET layer 2, and an FRP layer 3 arranged in sequence. There are several laminated woods 4 connected between the PET layer 2 and the FRP layer 3, and a heat-insulating layer 5 is arranged between two adjacent laminated woods 4; a glue injection groove 11 is formed on the thermoplastic plate layer 1, and a structural adhesive 12 is filled in the glue injection groove 11; an aluminum guide rail 6 is welded on the side wall of the thermoplastic plate layer 1 facing away from the PET layer 2. The full-welding structure of the aluminum guide rail 6 can improve the ventilation, facilitate the cold air circulation, and further improve the anti-load-bearing performance of the lightweight bottom plate.
[0037] Embodiment 4 Embodiment 4 also provides a preparation process for a lightweight bottom plate.
[0038] A preparation process for a lightweight bottom plate includes the following steps: Glue injection: First, a glue injection groove 11 is formed on the thermoplastic plate, then it is preheated at 40°C, and then the structural adhesive 12 in Preparation Example 2 is injected into the glue injection groove 11 to obtain the thermoplastic plate layer 1. The thickness of the thermoplastic plate layer 1 can be 1-2 cm, and in this embodiment, it is 1 cm; Plate making: First, several layers of laminated wood 4 are laminated on the FRP layer 3, and then heat-insulating materials are filled between two adjacent laminated woods 4 to obtain the heat-insulating layer 5. Then, the PET layer 2 and the thermoplastic plate layer 1 are sequentially laminated on the laminated wood 4, and finally, an aluminum guide rail 6 is welded on the side wall of the thermoplastic plate layer 1 facing away from the PET layer 2. The full-welding structure of the aluminum guide rail 6 is adopted to obtain the lightweight bottom plate. The thickness of the laminated wood 4 is 6 cm; the thickness of the PET layer 2 can be 1-2 cm, and in this embodiment, it is 1 cm; the thickness of the FRP layer 3 is 1 cm; the material of the heat-insulating layer 5 can be XPS material or PU; in this embodiment, it is XPS material.
[0039] Comparative example Comparative example 1 Comparative example 1 provides a lightweight bottom plate.
[0040] A lightweight bottom plate, comprising a thermoplastic plate, a PET layer 2, and an FRP layer 3 arranged in sequence. There are several laminated woods 4 connected between the PET layer 2 and the FRP layer 3, and a heat insulation layer 5 is arranged between two adjacent laminated woods 4.
[0041] Comparative Example 1 Comparative Example 1 also provides a preparation process for a lightweight bottom plate.
[0042] A preparation process for a lightweight bottom plate, comprising the following steps: Plate making: First, several laminated woods 4 are laminated on the FRP layer 3, then heat insulation materials are filled between two adjacent laminated woods 4 to obtain the heat insulation layer 5. Then, the PET layer 2 and the thermoplastic plate are laminated on the laminated wood 4 in sequence to obtain the lightweight bottom plate. The thickness of the laminated wood 4 is 6 cm; the thickness of the PET layer 2 can be 1 - 2 cm, and in this embodiment, it is 1 cm; the thickness of the FRP layer 3 is 1 cm; the material of the heat insulation layer 5 can be XPS material or PU; in this embodiment, it is XPS material; the thickness of the thermoplastic plate is 1 cm.
[0043] Application Example Application Example 1 Application Example 1 provides an insulation box.
[0044] Refer to Figure 1 and Figure 3 , an insulation box is made from the lightweight bottom plate and side plates in Example 1; the side plates include a thermoplastic plate layer 1 and an FRP layer 3 arranged oppositely. There are several laminated woods 4 connected between the thermoplastic plate layer 1 and the FRP layer 3, and a heat insulation layer 5 is arranged between two adjacent laminated woods 4; the thickness of the thermoplastic plate layer 1 is 1 cm; the thickness of the laminated wood 4 is 6 cm; the thickness of the FRP layer 3 is 1 cm; the material of the heat insulation layer 5 is XPS material.
[0045] Application Example 2 The difference between Application Example 2 and Application Example 1 is that an insulation box is made from the lightweight bottom plate and side plates in Example 2; the rest is the same as Application Example 1.
[0046] Application Example 3 The difference between Application Example 3 and Application Example 1 is that an insulation box is made from the lightweight bottom plate and side plates in Example 3; the rest is the same as Application Example 1.
[0047] Application Example 4 The difference between Application Example 4 and Application Example 1 is that an insulation box is made from the lightweight bottom plate and side plates in Example 4; the rest is the same as Application Example 1.
[0048] Comparative Application Example Comparative Application Example 1 The difference between Comparative Application Example 1 and Application Example 1 lies in that an incubator is made of the lightweight bottom plate and side plates in Comparative Example 1; the rest is the same as in Application Example 1.
[0049] Comparative Application Example 2 Comparative Application Example 2 provides an incubator.
[0050] An incubator is made of a bottom plate and side plates; the bottom plate includes an inner FRP layer, a plywood layer, and an outer FRP layer arranged in sequence. There are several wooden squares connected between the plywood layer and the outer FRP layer, and a heat preservation layer 5 is arranged between adjacent two wooden squares; the side plates include an inner FRP layer and an outer FRP layer arranged oppositely. There are several wooden squares connected between the inner FRP layer and the outer FRP layer, and a heat preservation layer 5 is arranged between adjacent two wooden squares; the thickness of the inner FRP layer is 1 cm; the thickness of the wooden square is 6 cm; the thickness of the outer FRP layer is 1 cm; the material of the heat preservation layer 5 is XPS material.
[0051] Strength in the performance detection test: Detect the elastic modulus, maximum load, static bending strength, and anti-bending strength of 250 Mpa of the lightweight bottom plates in each embodiment and comparative example.
[0052] Weight: Detect the weights of the incubators in each application example and comparative application example. The sizes of the incubators in this application example and comparative application example are suitable for two-axle vehicles with a vehicle length of 6.8 - 9.6 meters.
[0053] Table 1 Performance detection results of lightweight bottom plates Table 2 Performance detection results of incubators Sample Weight (tons) Application Example 1 1.9 Application Example 2 1.9 Application Example 3 1.9 Application Example 4 1.9 Comparative Application Example 1 1.9 Comparative Application Example 2 3 Combined with Table 1, Embodiments 1 - 3 and Comparative Example 1, the lightweight bottom plates in Embodiments 1 - 3 have higher strength. It can be seen that when preparing the thermoplastic plate layer 1, by grooving on the thermoplastic plate and then injecting the structural adhesive 12 in the present application, the strength of the lightweight bottom plate can be improved.
[0054] Combined with Table 1, Embodiment 2 and Embodiment 4, the lightweight bottom plate in Embodiment 4 has higher strength. It can be seen that when preparing the lightweight bottom plate, by welding aluminum guide rails 6 on the side wall of the thermoplastic plate layer 1 facing away from the PET layer 2 and adopting a full-weld structure of the aluminum guide rails 6, the strength of the lightweight bottom plate can be further improved.
[0055] Combined with Table 2, Application Examples 1 - 4 and Comparative Application Examples 1 - 2, it can be seen that the incubators made of the lightweight bottom plates in the present application have smaller weights, reducing the transportation cost and energy consumption.
[0056] This specific embodiment is only an interpretation of the present application and does not limit the present application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.
Claims
1. A lightweight base plate, characterized in that: The invention comprises a thermoplastic board layer (1), a PET layer (2), and an FRP layer (3) which are arranged in sequence, wherein a laminated wood (4) is connected between the PET layer and the FRP layer, and a thermal insulation layer (5) is arranged between two adjacent laminated woods (4); a glue injection groove (11) is provided on the thermoplastic board layer (1), and the glue injection groove (11) is filled with structural glue (12).
2. A lightweight base plate according to claim 1, characterized in that: The raw materials of the structural adhesive include the following components in parts by weight: 90-110 parts of polyol polymer, 110-120 parts of MDI, 4-6 parts of modified reinforcing material, 6-8 parts of toughening material, 0.05-0.1 parts of catalyst, and 1-2 parts of thixotropic agent.
3. A lightweight base plate according to claim 2, characterized in that: The polyol polymer includes poly-ε-caprolactone diol.
4. A lightweight base plate according to claim 2, characterized in that: The preparation method of the modified reinforced material comprises the following steps: Add nanographene, nanosilica and a silane coupling agent into ethanol, perform ultrasonic dispersion and dry to obtain a modified reinforced material; wherein the weight ratio of the nanographene, the nanosilica, the silane coupling agent and the ethanol is (0.5-1.5):(3-5):(1-2):
18.
5. A lightweight base plate according to claim 2, characterized in that: The preparation method of the toughening material comprises the following steps: Dissolving the segmented polyurethane ionomer in acetone to obtain a treatment solution; The short-cut aramid pulp and the hydroxylated carbon nanotubes are immersed in the treatment liquid, taken out after ultrasonic vibration, and dried to obtain the toughened material.
6. A lightweight base plate according to claim 2, characterized in that: The preparation method of the structural adhesive comprises the following steps: Firstly, a polyol polymer is heated and stirred, and then a thixotropic agent is added and stirred to obtain a polyol polymer system A; Under vacuum conditions, firstly adding the modified reinforcing material into the polyol polymer system A, stirring and mixing, and then adding the toughening material, stirring and mixing, to obtain the polyol polymer system B; The MDI is first preheated, then added to the polyol polymer system B, sheared and mixed, and finally a catalyst is added, stirred for reaction, and vacuum degassed to obtain a structural adhesive.
7. The lightweight base plate according to claim 1, characterized in that: The material of the thermal insulation layer is XPS material or PU.
8. A process for preparing a lightweight base plate according to any one of claims 1 to 7, characterized in that: The following steps are involved: Glue injection: firstly, a glue injection groove (11) is opened on the thermoplastic plate, then preheated, and then a structural glue (12) is injected into the glue injection groove (11), and the structural glue (12) is solidified to fill the glue injection groove (11), thereby obtaining a thermoplastic plate layer (1); Board making: firstly, a plurality of laminated woods (4) are compounded on the FRP layer (3), and then a heat-insulating material is filled between two adjacent laminated woods (4) to obtain a heat-insulating layer (5), and then a PET layer (2) and a thermoplastic board layer (1) are compounded on the laminated woods (4) in sequence to obtain a lightweight baseboard.
9. An insulated box, characterized in that: It comprises a lightweight bottom plate and side plates as described in any one of claims 1 to 7.
10. The thermal insulation box according to claim 9, characterized in that: The side panel comprises a thermoplastic board layer (1) and an FRP layer (3) which are arranged opposite to each other, a laminated wood (4) is connected between the thermoplastic board layer (1) and the FRP layer (3), and a heat-insulating layer (5) is arranged between two adjacent laminated woods (4).