Thermal insulation material comprising polyester fiber mesh fabric laminated with aluminum foils on both sides, and preparation method therefor

Abstract

The present application relates to thermal insulation materials, and in particular to a thermal insulation material comprising a polyester fiber mesh fabric laminated with aluminum foils on both sides, and a preparation method therefor. The thermal insulation material comprising a polyester fiber mesh fabric laminated with aluminum foils on both sides consists of adhesive layers, a polyester fiber mesh fabric layer, and aluminum foil material layers; each aluminum foil material layer is formed by laminating an aluminum foil with PET and PE; the adhesive layers are formed by applying an adhesive to both the upper and lower surfaces of the polyester fiber mesh fabric layer and then curing and solidifying same; the aluminum foil material layers are bonded to the polyester fiber mesh fabric layer by means of the adhesive layers; the adhesive comprises a high molecular weight polyester resin, a curing agent, and ethyl acetate; the high molecular weight polyester resin has a molecular weight ranging from 25,000 to 30,000 and is prepared from raw materials comprising 2-chloro-1,3-propanediol and tetrahydrophthalic anhydride. In the present application, by means of the design of the unique composite structure, the optimized selection of the layers of materials and the accurate control in the preparation process, the factors work together, so that the coefficient of thermal conductivity of the prepared material satisfies the requirement of less than or equal to 0.038 W / (m.k), and the peel strength of the prepared material is greater than or equal to 10 N / 5 CM.

Description

A double-sided composite aluminum foil thermal insulation material made of polyester fiber mesh and its preparation method Technical Field

[0001] This application relates to the field of thermal insulation materials technology, specifically to a polyester fiber mesh double-sided composite aluminum foil thermal insulation material and its preparation method. Background Technology

[0002] The primary function of cold storage is to maintain a low-temperature environment to preserve items that require refrigeration or freezing. As the interface between the cold storage and the external environment, the design and material selection of the cold storage door are crucial for maintaining temperature stability within the cold storage. Therefore, highly efficient insulation materials are typically used to ensure the door has good thermal insulation performance, reducing heat exchange and thus maintaining the low-temperature environment inside the cold storage.

[0003] In related technologies, asbestos, rock wool, and PVC foam are used as thermal insulation materials for cold storage doors. However, these materials are heavy and difficult to process, and their thermal conductivity W / (mk) does not meet the requirement of being less than 0.038.

[0004] To address the problems existing in the aforementioned related technologies, a polyester fiber mesh double-sided composite aluminum foil thermal insulation material is provided.

[0005] Summary of the Invention

[0006] To address the issues of excessive weight, difficult processing, and thermal conductivity (W / (mk)) of insulation materials used in cold storage doors in related technologies, this application provides a polyester fiber mesh double-sided composite aluminum foil insulation material and its preparation method.

[0007] Firstly, the polyester fiber mesh double-sided composite aluminum foil thermal insulation material provided in this application adopts the following technical solution:

[0008] A double-sided composite aluminum foil thermal insulation material made of polyester fiber mesh includes an adhesive layer, a polyester fiber mesh layer, and an aluminum foil material layer.

[0009] The aluminum foil material layer is composed of aluminum foil and PET and PE composites;

[0010] The adhesive layer is obtained by coating the adhesive onto the upper and lower surfaces of the polyester fiber mesh layer and then solidifying it.

[0011] The aluminum foil material layer is bonded to the polyester fiber mesh layer through an adhesive layer;

[0012] The adhesive is composed of the following components in parts by weight: 100 parts of high molecular weight polyester resin, 10-20 parts of curing agent, and 3-5 parts of ethyl acetate;

[0013] The high molecular weight polyester resin has a molecular weight of 25,000-30,000, and its raw materials include the following components: 55-80 parts of 2-chloro-1,3-propanediol and 90-120 parts of tetrahydrophthalic anhydride.

[0014] By adopting the above technical solution, the resulting polyester fiber mesh double-sided composite aluminum foil thermal insulation material has the advantages of thinness and light weight compared with traditional thermal insulation materials. Furthermore, the peel strength between the aluminum foil layer and the polyester fiber mesh is ≥10N / 5CM, and the thermal conductivity is ≤0.038W / (mk).

[0015] The reasons for this may be: its unique composite structure, the optimized selection of materials for each layer, and the precise control during the preparation process. These factors work together to make this material a high-performance thermal insulation material.

[0016] Preferably, the curing agent is a compound system of benzoyl peroxide and methyl ethyl ketone peroxide in a mass ratio of 0.6-0.8:1.

[0017] By adopting the above technical solution, the curing agent of this compound system has good compatibility and stability, and can form a good combination with high molecular weight polyester resin and other components, ensuring the uniformity and stability of the adhesive layer. This helps to enhance the adhesion between the aluminum foil material layer and the polyester fiber mesh layer, improve the peel strength of the material, and the use of the curing agent of this compound system can also have a positive impact on the thermal conductivity of the material. By optimizing the curing process, the porosity and defects inside the material can be reduced, the heat conduction channels can be reduced, thereby improving the thermal insulation performance of the material.

[0018] Preferably, the thickness of the aluminum foil material layer is 0.07mm-1mm.

[0019] By adopting the above technical solution, within this thickness range, the aluminum foil material layer can ensure sufficient heat reflection effect without being too thick and heavy. Thus, while ensuring thermal insulation performance, the overall weight and cost of the material are controlled. It also has good flexibility and plasticity, and can be tightly combined with the polyester fiber mesh layer to form a stable and strong composite structure.

[0020] Preferably, the amount of adhesive applied to the polyester fiber mesh layer is 15-30 gsm.

[0021] By adopting the above technical solution, a coating amount range of 15-30 gsm can ensure adhesive strength while avoiding unnecessary material waste.

[0022] Secondly, the preparation method of the polyester fiber mesh double-sided composite aluminum foil thermal insulation material provided in this application adopts the following technical solution:

[0023] A method for preparing a polyester fiber mesh double-sided composite aluminum foil thermal insulation material includes the following steps:

[0024] S1. Pretreatment: Soak the polyester fiber mesh in the aerogel composite nanoparticle solution for 1-2 hours, take it out and dry it, and then put it into the mesh preheating roller at 85-90℃ for 8-10 seconds to form a polyester fiber mesh layer.

[0025] S2. Coating and bonding: Apply adhesive to the upper and lower surfaces of the polyester fiber mesh layer using a roller lamination method, and use a bonding process to bond the aluminum foil material layer to the upper and lower surfaces of the polyester fiber mesh layer through the adhesive.

[0026] S3. Post-processing: Place the bonded sample in an oven for drying to allow the adhesive to solidify and form an adhesive layer. The drying time is 24-36 hours. After cooling, the sample is obtained.

[0027] By adopting the above technical solutions, high-performance and stable thermal insulation materials can be prepared, which have broad application prospects.

[0028] Preferably, the aerogel composite nanoparticle solution in S1 is composed of carbon aerogel, titanium dioxide aerogel and boron nitride nanoparticles.

[0029] By adopting the above technical solution, combining aerogels and nanoparticles with different properties, their respective advantages can be fully utilized to optimize and improve the material's performance. This composite solution not only enhances the material's thermal insulation performance but also endows it with more functionality, such as self-cleaning and conductivity, enabling its application in more fields.

[0030] Preferably, the first gradient temperature in the drying oven in S3 is 55-65℃, and the second gradient temperature is 70-85℃.

[0031] By adopting the above technical solution, the segmented gradient heating method allows the binder to gradually complete the curing process during the gradual heating process, which is beneficial to maintaining the flatness and structural stability of the overall material.

[0032] Preferably, the humidity in the drying room in step S3 is controlled between 20% and 25%.

[0033] By adopting the above technical solution, it is possible to ensure that the adhesive is cured under suitable humidity conditions, thereby obtaining a uniform and dense adhesive layer.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. By combining an aluminum foil material layer, an adhesive layer, and a polyester fiber mesh layer, this material achieves a highly efficient thermal insulation effect. The aluminum foil material layer can effectively reflect heat and reduce heat conduction efficiency, while the polyester fiber mesh layer has excellent thermal insulation performance. The uniform coating and curing of the adhesive layer ensures a tight bond between the layers, further improving the overall thermal insulation performance.

[0036] 2. The composition of the aluminum foil material layer and the adhesive layer in the material has been carefully designed and optimized to ensure strong adhesion between the layers. At the same time, the precise control in the preparation process, such as the segmented gradient heating drying process, allows the adhesive to be cured evenly, avoiding deformation or cracking of the material, thereby improving the overall structural stability and strength of the material.

[0037] 3. The preparation method provided in this application is simple and easy to implement, and has high production efficiency. Through pretreatment, coating and bonding and post-treatment steps, it can efficiently prepare high-performance thermal insulation materials. In addition, by optimizing the thickness of the aluminum foil material layer and the amount of adhesive coating, a balance between material performance and cost is achieved, reducing production costs and improving economic benefits. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the embodiments. Unless otherwise specified below, the raw materials used in the present application are all commercially available materials.

[0039] Preparation Examples 1-5

[0040] A binder, the preparation method of which and the dosage (kg) of each component are as follows: High molecular weight polyester resin, curing agent, and ethyl acetate are blended in a certain proportion to obtain the binder. The curing agent is a compound system of benzoyl peroxide and methyl ethyl ketone peroxide in a mass ratio of 0.6:1. The components and their weights in the binders of Preparation Examples 1-5 are shown in Table 1.

[0041] Table 1: Components and their weights (kg) in the binders used in Examples 1-5

[0042] It should be noted that this high molecular weight polyester resin comprises the following raw materials in parts by weight and is prepared by the following method: 2-chloro-1,3-propanediol, tetrahydrophthalic anhydride, hexanediol, dimethylolpropionic acid, and catalyst PC9800 are added to a reaction vessel in the following proportions. The mixture is protected from light and purged with nitrogen. The temperature is then raised to 210°C, stirred until homogeneous, and reacted for 1.5 hours. The temperature is then reduced to 240°C and the reaction continues for 3 hours. The water generated during the reaction is removed, and the mixture is cooled to room temperature to obtain the final product. The relative molecular weight of the obtained polyester resin is 28,000. The components and their weights in the high molecular weight polyester resin are shown in Table 2.

[0043] Table 2: Components and their weights (kg) in high molecular weight polyester resin

[0044] Preparation Examples 6-9

[0045] A binder, which differs from Preparation Example 1 in that the amounts of each component of the high molecular weight polyester resin are different, as shown in Table 3.

[0046] Table 3: Components and their weights (kg) in the high molecular weight polyester resins prepared in Examples 6-9

[0047] Preparation Example 10

[0048] A binder, which differs from Preparation Example 1 in that the curing agent used is a single benzoyl peroxide.

[0049] Preparation Example 11

[0050] A binder, which differs from Preparation Example 1 in that the curing agent used is a single methyl ethyl ketone peroxide.

[0051] Preparation Example 12

[0052] A binder, which differs from Preparation Example 1 in that the curing agent used is commercially available Fukuda LY-ME108 curing agent.

[0053] Performance testing

[0054] The thermal insulation materials prepared in the examples and comparative examples were selected as test objects. The peel strength between the aluminum foil material layer and the polyester fiber mesh layer was tested according to standard EN ISO 1421, and the thermal conductivity of the overall material was tested according to standard EN12664:2001.

[0055] Example

[0056] Example 1

[0057] A double-sided composite aluminum foil thermal insulation material made of polyester fiber mesh fabric comprises a polyester fiber mesh fabric layer, an aluminum foil material layer, and an adhesive layer. The aluminum foil material layer is composed of aluminum foil, PET, and PE, and has a thickness of 0.08 mm. The adhesive layer is obtained by coating the upper and lower surfaces of the polyester fiber mesh fabric layer with an adhesive and then allowing it to solidify. The aluminum foil material layer is bonded to the polyester fiber mesh fabric layer through the adhesive layer. The preparation method of this material is as follows:

[0058] S1. Pretreatment: The polyester fiber mesh is immersed in a solution composed of carbon aerogel, titanium dioxide aerogel and boron nitride nanoparticles for 2 hours, then taken out and dried, and then placed in a 90℃ mesh preheating roller for 8 seconds to form a polyester fiber mesh layer.

[0059] S2, Coating and Lamination: The adhesive prepared in Preparation Example 1 is coated on the upper and lower surfaces of the polyester fiber mesh layer by roller lamination. The amount of adhesive coated on the polyester fiber mesh layer is 20 gsm. The aluminum foil material layer is bonded to the upper and lower surfaces of the polyester fiber mesh layer by the adhesive.

[0060] S3. Post-processing: Place the above-bonded sample into an oven, with the humidity of the oven controlled at 22%, and perform drying treatment. Gradual temperature increase, continue drying at the first gradient temperature of 58℃ for 14 hours, and continue drying at the second gradient temperature of 80℃ for 12 hours, so that the adhesive coagulates and solidifies to form an adhesive layer. After cooling to 30℃, the sample is obtained.

[0061] Comparative Example 1

[0062] A polyester fiber mesh double-sided composite aluminum foil thermal insulation material differs from Example 1 in that the aluminum foil material layer consists of only one component: aluminum foil.

[0063] Comparative Example 2

[0064] A double-sided composite aluminum foil thermal insulation material made of polyester fiber mesh is different from that in Example 1 in that the high molecular weight polyester resin in the binder is commercially available Mitsubishi LP-050S50TO.

[0065] Comparative Example 3

[0066] A double-sided composite aluminum foil thermal insulation material made of polyester fiber mesh differs from Example 1 in that the high molecular weight polyester resin in the binder is commercially available Changxing ETERKYD 50176.

[0067] The thermal insulation materials prepared in Example 1 and Comparative Examples 1-3 were extracted, and the peel strength of the aluminum foil material layer and the polyester fiber mesh layer and the overall thermal conductivity of the material were tested according to the above standards. The average value of the test results was taken and included in Table 4.

[0068] Table 4: Test results of Example 1 and Comparative Examples 1-3

[0069] As can be seen from Table 4, the thermal insulation material prepared by Example 1 has a peel strength of 11.6 N / 5 cm and a thermal conductivity of 0.036 W / (mk), exhibiting excellent thermal insulation performance. Furthermore, the aluminum foil material layer and the polyester fiber mesh layer are bonded firmly enough. Compared with thermal insulation materials made from traditional PVC foam materials, it has the advantages of being thinner and lighter.

[0070] The thermal insulation materials prepared by Comparative Examples 1-3 have a peel strength of 9.2-12.1 N / 5 cm and a thermal conductivity of 0.040-0.044 (W / (mk). Although the peel strength of Comparative Example 2 is even better than that of Example 1, the thermal conductivity does not meet the requirements for use.

[0071] In Comparative Example 1, the aluminum foil material layer consists of only aluminum foil as a single component and is not combined with PET or PE. This may reduce the flexibility and composite strength of the aluminum foil, thereby affecting its bonding effect with the polyester fiber mesh layer. At the same time, the thermal conductivity of aluminum foil as a single material may be relatively high, resulting in an increase in the overall thermal conductivity of the material.

[0072] In Comparative Examples 2 and 3, the high molecular weight polyester resins used as adhesives were commercially available products of different types, rather than the specific self-made high molecular weight polyester resins used in Example 1. Different types of high molecular weight polyester resins may have different molecular weights, molecular structures, functional groups, etc. These differences may affect the adhesive strength, curing speed, and post-curing performance of the adhesive. If the adhesive performance of the adhesive is poor, the bonding between the aluminum foil material layer and the polyester fiber mesh layer may not be strong enough, resulting in reduced peel strength and more air gaps between the interfaces. These gaps will become channels for heat conduction, increasing the thermal conductivity of the entire material.

[0073] Examples 2-5

[0074] A polyester fiber mesh double-sided composite aluminum foil thermal insulation material differs from Example 1 in that the use of the adhesive is different, as shown in Table 5.

[0075] Table 5: Comparison of the use of binders in Examples 2-5

[0076] The thermal insulation materials prepared in Examples 2-5 were extracted, and the peel strength between the aluminum foil material layer and the polyester fiber mesh layer and the overall thermal conductivity of the material were tested according to the above standards. The average value of the test results was taken and included in Table 6.

[0077] Table 6: Test Results of Examples 2-5

[0078] As can be seen from the table above, the thermal insulation materials prepared in Examples 2-5 have a peel strength of 11.8-12.2 N / 5CM and a thermal conductivity of 0.034-0.037 W / (mk), both of which meet the requirements for use.

[0079] As the test results above show, the peel strength is enhanced with the increase of curing agent content, and there is a slight increase. The addition of ethyl acetate has no significant effect on peel strength, but the thermal conductivity fluctuates slightly. Considering both results, Example 5 is the preferred example.

[0080] This may be because the reaction between the curing agent and the polymer chain can produce stronger chemical bonds, which enhances the adhesion between the binder and the material interface. This enhanced adhesion helps to reduce defects and voids at the interface, further improving the peel strength. Excess ethyl acetate is prone to volatilization, which may leave tiny pores or defects inside the material. These microporous structures make heat conduction easier, thereby increasing the thermal conductivity of the material.

[0081] Under the experimental conditions of Example 5, the content of curing agent and the amount of ethyl acetate added reached a relatively balanced state, which ensured good adhesion between the binder and the material, and reduced the phenomenon of increased thermal conductivity caused by the appearance of micropores.

[0082] Examples 6-12

[0083] A polyester fiber mesh double-sided composite aluminum foil thermal insulation material differs from Example 1 in that the adhesive used is different, as shown in Table 7.

[0084] Table 7: Comparison of the use of binders in Examples 6-12

[0085] The thermal insulation materials prepared in Examples 6-12 were extracted, and the peel strength between the aluminum foil material layer and the polyester fiber mesh layer and the overall thermal conductivity of the material were tested according to the above standards. The average value of the test results was taken and included in Table 8.

[0086] Table 8: Test Results of Examples 6-12

[0087] As can be seen from the table above, the thermal insulation materials prepared in Examples 6-9 have good peel strength test results, which are all superior to those in Example 1, while the thermal conductivity is 0.39-0.44 W / (mk), which does not meet the usage requirements.

[0088] In Examples 10-12, one component of the adhesive, the curing agent, was selected. Single-component curing agents, such as benzoyl peroxide used in Example 10, showed inferior peel strength and thermal conductivity compared to Example 1, while methyl ethyl ketone peroxide used in Example 11 showed good peel strength but poor thermal conductivity.

[0089] For example, in Example 12, commercially available Fukuda LY-ME108 curing agent was used. The resulting material had a thermal conductivity of 0.48 W / (mk) and a peel strength of 12.1 N / 5 cm, which was still below expectations.

[0090] This may be because the curing agent of the compound system of benzoyl peroxide and methyl ethyl ketone peroxide has good compatibility and stability, and can form a good combination with high molecular weight polyester resin and other components, ensuring the uniformity and stability of the adhesive layer. This helps to enhance the adhesion between the aluminum foil material layer and the polyester fiber mesh layer, improve the peel strength of the material, and the use of this compound curing agent can also have a positive impact on the thermal conductivity of the material. By optimizing the curing process, the porosity and defects inside the material can be reduced, the heat conduction channels can be reduced, thereby improving the thermal insulation performance of the material.

[0091] Example 13

[0092] A polyester fiber mesh double-sided composite aluminum foil thermal insulation material differs from Example 1 in that the pretreatment step in S1 is omitted.

[0093] Example 14

[0094] A double-sided composite aluminum foil thermal insulation material made of polyester fiber mesh is different from that in Example 1 in that the thickness of the aluminum foil material layer is 1.2 mm.

[0095] Example 15

[0096] A double-sided composite aluminum foil thermal insulation material made of polyester fiber mesh is different from that in Example 1 in that the thickness of the aluminum foil material layer is 0.5 mm.

[0097] Example 16

[0098] A double-sided composite aluminum foil thermal insulation material made of polyester fiber mesh differs from Example 1 in that the amount of adhesive applied to the polyester fiber mesh layer is 10 gsm.

[0099] Example 17

[0100] A double-sided composite aluminum foil thermal insulation material made of polyester fiber mesh differs from Example 1 in that the amount of adhesive applied to the polyester fiber mesh layer is 30 gsm.

[0101] Example 18

[0102] A polyester fiber mesh double-sided composite aluminum foil thermal insulation material differs from Example 1 in that S3 does not adopt a gradient heating drying method, but is directly dried at 80°C for 26 hours.

[0103] Comparative Example 4

[0104] A double-sided composite aluminum foil thermal insulation material made of polyester fiber mesh differs from Example 1 in that an adhesive is applied to either the upper or lower surface of the polyester fiber mesh layer, with a coating amount of 20 gsm, and the aluminum foil material layer is then bonded to it.

[0105] The thermal insulation materials prepared in Examples 14-18 and Comparative Example 4 were extracted, and the peel strength between the aluminum foil material layer and the polyester fiber mesh layer and the overall thermal conductivity of the material were tested according to the above standards. The average value of the test results was taken and recorded in Table 9.

[0106] Table 9: Test results of Examples 14-18 and Comparative Example 4

[0107] As can be seen from the table above, the thermal insulation materials prepared in Examples 15 and 16 have a peel strength greater than 10 N / 5 cm, which is good. However, their thermal conductivity is 0.048 W / (mk) and 0.042 W / (mk), respectively, which do not meet the requirements for use.

[0108] The material prepared in Example 14 has a thermal conductivity of 0.033 W / (mk), which meets the actual application requirements, but its peel strength is below 10 N / 5 cm, which cannot guarantee sufficient bonding strength.

[0109] In Example 13, the pretreatment step S1 was omitted, which affected the peel strength and thermal conductivity of the final product to varying degrees. The peel strength was 8.3 N / 5 cm and the thermal conductivity was 0.051 W / (mk). This may be because the solution used in the pretreatment step may contain components that can enhance the surface activity of the polyester fiber mesh or can form a better chemical or physical bond with the binder. If the pretreatment step is omitted, the surface of the polyester fiber mesh may not have enough activity or adhesion points, resulting in a weakening of the bond between the binder and the mesh.

[0110] In addition, regarding the effect on thermal conductivity, the solution in the pretreatment may contain nanoparticles with excellent thermal conductivity or thermal insulation effect. These nanoparticles can fill the gaps in the polyester fiber mesh, improve the thermal insulation performance of the mesh, and also help improve the structure of the mesh and reduce the internal heat conduction channels.

[0111] Based on the test data from Examples 17 and 18, the thermal conductivity is between 0.037 and 0.038 W / (mk), which basically meets the actual requirements. However, the bonding strength between the adhesive layer and the aluminum foil material layer is poor, with a peel strength of 9.2-9.6 N / 5 cm.

[0112] Example 18 uses a continuous drying method at the same temperature without using a gradient temperature increase. This drying method may cause the adhesive to cure rapidly in a short time. However, due to the rapid temperature change, the adhesive may not be able to fully penetrate into the tiny gaps between the aluminum foil and the polyester fiber mesh, resulting in uneven curing or internal defects. Furthermore, excessively rapid curing may also cause stress inside the adhesive, affecting its bonding effect with the aluminum foil and the polyester fiber mesh.

[0113] As for Comparative Example 4, it only applies adhesive to one side and attaches the aluminum foil material layer. This has little impact on the bonding strength between the polyester fiber mesh layer and the aluminum foil material layer on one side, but the thermal insulation performance will be greatly reduced.

[0114] The above are all modifications that can be made to this embodiment without contributing any inventive step, or solutions that clearly constitute technical teaching, after reading this specification. However, as long as they are within the scope of the claims of this application, they should be protected by patent law.

Claims

1. A polyester fiber mesh cloth double-sided composite aluminum foil thermal insulation material, characterized in that, The adhesive layer, the polyester fiber mesh cloth layer, and the aluminum foil material layer are sequentially arranged. The aluminum foil material layer is formed by compounding aluminum foil with PET and PE. The adhesive layer is obtained by coating adhesive on the upper and lower surfaces of the polyester fiber mesh cloth layer and then solidifying and curing. The aluminum foil material layer is adhered to the polyester fiber mesh cloth layer through the adhesive layer. The adhesive is composed of the following components by weight: 100 parts of high molecular weight polyester resin, 10-20 parts of curing agent, and 3-5 parts of ethyl acetate. The high molecular weight polyester resin has a molecular weight of 25000-30000 and is prepared from the following components: 55-80 parts of 2-chloro-1,3-propanediol and 90-120 parts of tetrahydrophthalic anhydride.

2. The polyester fiber mesh cloth double-sided composite aluminum foil thermal insulation material according to claim 1, characterized in that, The curing agent is a compound system of benzoyl peroxide and methyl ethyl ketone peroxide with a mass ratio of 0.6-0.8:

1.

3. The polyester fiber mesh cloth double-sided composite aluminum foil thermal insulation material according to claim 1, characterized in that, The thickness of the aluminum foil material layer is 0.07-1 mm.

4. The polyester fiber mesh cloth double-sided composite aluminum foil thermal insulation material according to claim 1, characterized in that, The coating amount of the adhesive on the polyester fiber mesh cloth layer is 15-30 gsm.

5. A method of manufacturing the polyester fiber web cloth double-faced composite aluminum foil thermal insulation material according to any one of claims 1 to 4, characterized by, The method comprises the following steps: S1, pretreatment: soaking the polyester fiber mesh cloth in the aerogel composite nanoparticle solution for 1-2 h, taking it out to dry, and then placing it in a mesh cloth preheating roller at 85-90°C for 8-10 s to form a polyester fiber mesh cloth layer; S2, coating and bonding: coating adhesive on the upper and lower surfaces of the polyester fiber mesh cloth layer using a roller wheel, and bonding the aluminum foil material layer to the upper and lower surfaces of the polyester fiber mesh cloth layer through the adhesive; S3, post-treatment: placing the bonded sample in an oven for drying treatment to solidify and cure the adhesive and form an adhesive layer, and the drying time is 24-36 h, and the product is obtained after cooling.

6. The method of claim 5, wherein the polyester fiber web-aluminum foil composite heat insulating material is prepared by the steps of: (a) preparing a polyester fiber web; (b) coating the polyester fiber web with a polyurethane adhesive; (c) laminating the polyester fiber web with an aluminum foil; and (d) coating the aluminum foil with a polyurethane adhesive. The aerogel composite nanoparticle solution in S1 is formed by compounding carbon aerogel, titanium dioxide aerogel, and boron nitride nanoparticles.

7. The method of claim 5, wherein the polyester fiber web-aluminum foil composite heat insulating material is prepared by the steps of: (a) preparing a polyester fiber web; (b) coating the polyester fiber web with a polyurethane adhesive; (c) laminating the polyester fiber web with an aluminum foil; and (d) coating the aluminum foil with a polyurethane adhesive. The first gradient temperature in the oven in S3 is 55-65°C, and the second gradient temperature is 70-85°C.

8. The method for preparing the polyester fiber mesh double-sided composite aluminum foil thermal insulation material according to claim 5, characterized in that, The humidity in the oven in S3 is controlled between 20% and 25%.

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