Thermal insulation PVC coated tent material and its preparation method

Abstract

The application relates to the field of PVC (polyvinyl chloride) screen materials, and particularly discloses a heat-insulating PVC-coated tent material and a preparation method thereof. The heat-insulating PVC-coated tent material comprises, in sequence, a pasting layer, a PVC coating layer, a black PVC coating layer, a polyester fiber screen cloth layer, a black PVC coating layer, a PVC coating layer and a pasting layer. The PVC coating layer comprises the following components in parts by weight: 95-105 parts of PVC resin; 60-75 parts of a plasticizer; 3-6 parts of a stabilizer; 2-4 parts of soybean oil; 10-18 parts of titanium white; 6-15 parts of a flame retardant; 1-3 parts of an anti-UV agent; 1-2 parts of an antioxidant; 2.5-4 parts of a mildew-proof agent; and 40-80 parts of composite calcium carbonate modified glass microbeads. The composite calcium carbonate modified glass microbeads take glass microbeads as a core and take calcium carbonate as a film for coating the glass microbeads, can not only play an excellent gradient heat-insulating effect, but also can overcome the application defects of calcium carbonate and glass microbeads used separately, and further make the heat-insulating capacity of the tent material higher and more stable.

Description

Technical Field

[0001] This application relates to the field of PVC mesh materials, and more specifically, it relates to a heat-insulating PVC coated tent material and its preparation method. Background Technology

[0002] PVC mesh material is made of two layers of PVC film sandwiched with wire mesh. It has good flexibility, corrosion resistance, wear resistance and bending resistance. It also has the advantages of being waterproof, moisture-proof and UV-resistant. It is widely used in engineering covering, energy-saving building materials, interior decoration, transportation covering, agricultural greenhouses, tourist courtyards, outdoor camping and other fields.

[0003] Tent and shed materials are a common application of PVC mesh materials, widely used in industrial warehousing, logistics distribution, various outdoor exhibitions, sporting events, tourism and leisure, business gatherings, celebrations, business promotions, military, disaster relief, and other temporary and semi-permanent event tents. Traditional tent and shed materials typically consist of a layer of black PVC adhesive coated or laminated onto a polyester fiber mesh surface, followed by a layer of white or light-colored PVC adhesive, and finally, a finishing treatment on the outermost side. When used as outdoor tents, especially in high summer temperatures, the tent and shed materials need good heat insulation capabilities. Current technologies often use a combination of calcium fillers and glass microspheres to improve heat insulation, but the combined application of these two methods has limited effect on improving heat insulation. Furthermore, calcium fillers are prone to agglomeration, and broken glass microspheres will fail to provide insulation, making it difficult to achieve a high and stable improvement in the heat insulation performance of tent and shed materials.

[0004] Therefore, there is an urgent need to propose a solution to address the aforementioned technical problems. Summary of the Invention

[0005] In order to improve the heat insulation performance of tent materials in a high and stable manner, this application provides a heat-insulating PVC coated tent material and its preparation method.

[0006] In a first aspect, this application provides a heat-insulating PVC-coated tent / motel material, employing the following technical solution: a heat-insulating PVC-coated tent / motel material, comprising, in sequence, a mounting layer, a PVC coating, a blackened PVC coating, a polyester fiber mesh layer, a blackened PVC coating, a PVC coating, and a mounting layer, characterized in that the PVC coating comprises the following components in parts by weight:

[0007] 95-105 parts of PVC resin;

[0008] Plasticizer 60-75 parts;

[0009] Stabilizer 3-6 parts;

[0010] 2-4 parts soybean oil;

[0011] 10-18 parts titanium dioxide;

[0012] 6-15 parts flame retardant;

[0013] UV protectant 1-3 parts;

[0014] 1-2 parts antioxidant;

[0015] 2.5-4 parts of antifungal agent;

[0016] 40-80 parts of composite calcium carbonate modified glass microspheres;

[0017] The composite calcium carbonate modified glass microspheres were prepared by the following method:

[0018] S1. Immerse the glass microsphere raw material in an ethanol solution, then add a silane coupling agent, heat and react, then take it out and dry it to obtain pretreated glass microspheres.

[0019] S2. The glass microspheres pretreated in step S1 are ultrasonically dispersed in deionized water, calcium hydroxide solution is added, and carbon dioxide gas is continuously introduced at a constant temperature until the pH of the solution does not change. The resulting solid particles are taken out and dried, and then surface-treated with a titanate coupling agent to obtain composite calcium carbonate modified glass microspheres.

[0020] By adopting the above technical solution, this application utilizes composite calcium carbonate modified glass microspheres to achieve a unique bonding morphology between calcium carbonate and glass microspheres, thereby exhibiting excellent and stable thermal insulation performance in the mixed system. In the preparation of the composite calcium carbonate modified glass microspheres, the glass microspheres are first surface-modified with a silane coupling agent, enabling the formation of a uniform, dense, and continuous calcium carbonate film on the surface of the glass microspheres during subsequent vapor deposition. This calcium carbonate film protects the glass microspheres from damage. Then, a titanate coupling agent is used for surface treatment, improving the interfacial compatibility and affinity between the calcium carbonate film and the organic material. The resulting composite calcium carbonate modified glass microspheres are also less prone to aggregation, allowing them to be uniformly dispersed in the mixed system and stably perform their function. Meanwhile, by using glass microspheres as the core and calcium carbonate as the coating, a gradient insulation effect is formed when heat is transferred. Compared with the case where calcium carbonate and glass microspheres are used separately, this gradient insulation exhibits a more outstanding and superior insulation capacity, thereby significantly and stably improving the insulation capacity of tent and shed materials.

[0021] Preferably, step S2 is specifically set as follows: the glass microspheres pretreated in step S1 are ultrasonically dispersed in an aqueous solution, calcium hydroxide solution is added, carbon dioxide gas is continuously introduced at a constant temperature until the pH of the solution does not change, the resulting solid particles are taken out and dried, then surface-treated with a titanate coupling agent, ultrasonically dispersed in deionized water, and sodium dodecyl sulfate, methyl methacrylate and an initiator are added to react and obtain composite calcium carbonate modified glass microspheres.

[0022] By adopting the above technical solution and treating the calcium carbonate film with sodium dodecyl sulfate, methyl methacrylate, and an initiator, a polymethyl methacrylate coating can be formed on the outside of the calcium carbonate film. On the one hand, this allows the composite calcium carbonate modified glass microspheres to exist more stably in the mixed system. On the other hand, the polymethyl methacrylate coating also enables the composite calcium carbonate modified glass microspheres to form a tight bond with the organic matter, which can effectively cope with the adverse effects of heat transfer on the interfacial bonding stability. As a result, the final tent / motel material can exhibit a more excellent and stable heat insulation effect.

[0023] Preferably, the glass microspheres have a particle size of 0.5-1.5 μm, and the weight ratio of calcium carbonate to glass microspheres in the composite calcium carbonate modified glass microspheres is (5-9):(3-8).

[0024] By adopting the above technical solution, the particle size of the glass microspheres is easily suspended and dispersed during the preparation of composite calcium carbonate modified glass microspheres, which is conducive to forming a more uniform, dense and continuous calcium carbonate film. At the same time, the heat insulation layer structure formed by the above weight ratio of calcium carbonate and glass microspheres is relatively stable, and the obtained composite calcium carbonate modified glass microspheres have a more suitable particle size, which can be uniformly dispersed in the mixed system, thereby exerting a more stable and excellent heat insulation ability.

[0025] Preferably, the PVC coating further includes 5-12 parts by weight of a functional additive, which is composed of porous silica and potassium titanate whiskers, and the weight ratio of porous silica to potassium titanate whiskers is (0.3-0.5):1.

[0026] By adopting the above technical solution, both porous silica and potassium titanate whiskers have good thermal insulation capabilities. When porous silica and potassium titanate whiskers are used as functional additives in a specific weight ratio range, they can play an excellent compounding and synergistic role. Composite calcium carbonate modified glass microspheres and potassium titanate whiskers can be partially contained in the pores of porous silica, thereby utilizing the role of porous silica as a physical crosslinking point to form a thermal insulation network inside the PVC coating, which greatly improves the thermal insulation capability of tent and awning materials.

[0027] Preferably, the weight ratio of the porous silica to potassium titanate whiskers is 0.45:1.

[0028] By adopting the above technical solution, the porous silica and potassium titanate whiskers with the above weight ratio exhibit excellent performance after application, the formed heat insulation network is relatively stable, and the final tent and shed material has a high heat insulation effect.

[0029] Preferably, the porous silica has a particle size of 10-30 μm, and the potassium titanate whiskers have a diameter of 2-5 μm and a length of 50-100 μm.

[0030] By adopting the above technical solution, porous silica with the above particle size can be uniformly dispersed in the mixed system; potassium titanate whiskers of the above specifications have good spreading properties in the mixed system and are not easy to clump together; thus, the heat insulation network formed by the two can be uniformly dispersed in the PVC coating, thereby enabling the tent and awning material to exert a better heat insulation effect.

[0031] Preferably, the plasticizer is one or a combination of several of dibutyl phthalate, dioctyl phthalate, tricresyl phosphate, triphenyl phosphate, and dioctyl sebacate.

[0032] By adopting the above technical solutions, the plasticizers of the above types have good compatibility with PVC resin and can form a relatively stable mixing medium with each other, which is conducive to the full combination of other component raw materials and their own role, and can all obtain high-quality, stable heat-insulating PVC coated tent and shed materials.

[0033] Secondly, this application provides a method for preparing a heat-insulating PVC coated tent material, using the following technical solution:

[0034] A method for preparing a heat-insulating PVC coated tent material includes the following steps:

[0035] (1) Prepare raw materials including mounting layer, PVC coating, blackened PVC coating and polyester fiber mesh layer according to the proportion. Among them, the raw materials of each component required for PVC coating are mixed evenly to obtain PVC paste.

[0036] (2) After preheating the polyester fiber mesh layer in step (1), blackened PVC paste is coated on both sides. After coagulation and plasticization, a blackened PVC coating is formed.

[0037] (3) Apply PVC paste to the blackened PVC coating in step (2), and after coagulation and plasticization, form a PVC coating;

[0038] (4) Finally, the PVC coating is applied to form a mounting layer, and the heat-insulating PVC coating tent material is obtained.

[0039] By adopting the above technical solution, the above preparation method is simple to operate and easy to carry out large-scale production. Moreover, each layer of the structure is attached one by one, which not only facilitates quality control during the process, but also ensures the uniformity of each layer of the structure. As a result, the heat-insulating PVC coated tent material has high quality and can play an excellent and stable heat insulation role when applied.

[0040] In summary, this application has the following beneficial effects:

[0041] 1. The composite calcium carbonate modified glass microspheres used in this application have glass microspheres as the core and calcium carbonate as the film to coat the glass microspheres. This not only gives it an excellent gradient heat insulation effect, but also overcomes the application defects of using calcium carbonate and glass microspheres separately, thereby improving the heat insulation capacity of tent and shed materials in a high and stable way.

[0042] 2. This application uses polymethyl methacrylate to coat the calcium carbonate film, so that the composite calcium carbonate modified glass microspheres form a tight bond with the organic matter. This can effectively cope with the adverse effects of heat transfer on the interfacial bonding stability, thereby enabling the final tent and shed material to perform a more excellent and stable heat insulation effect.

[0043] 3. This application uses a functional additive composed of porous silica and potassium titanate whiskers in a specific weight ratio range. The additives can play an excellent compounding and synergistic role with each other, forming a heat insulation network inside the PVC coating, thereby greatly improving the heat insulation capacity of the tent material. Detailed Implementation

[0044] The present application will be further described in detail below with reference to the embodiments.

[0045] Unless otherwise specified, all raw materials used in the preparation examples and embodiments of this application are commercially available.

[0046] The stabilizer was purchased from Jiashan Sanyi New Materials Co., Ltd. as SZ963 calcium-zinc stabilizer.

[0047] The flame retardant was purchased from Suzhou Jiayi Chemical Co., Ltd. as K-609P;

[0048] The UV stabilizer was purchased from UV-326, a light stabilizer.

[0049] The antioxidant 1098 was purchased from Changzhou Youfeng Chemical Co., Ltd.

[0050] The antifungal agent was purchased from Foshan Liyuan Chemical Co., Ltd. as JL-1086 antibacterial and antifungal powder.

[0051] The silane coupling agent is type KH560;

[0052] The titanate coupling agent was purchased from Weixuanhao New Materials NXH-401.

[0053] Preparation examples of raw materials and / or intermediates

[0054] Preparation Example 1

[0055] A composite calcium carbonate modified glass microsphere was prepared by the following method:

[0056] S1. Immerse the glass microsphere raw material in 5 times its volume of 70% ethanol solution, then add 0.5% of the mass of the glass microsphere raw material with silane coupling agent, heat to 60℃ and react for 50 min, then take it out and dry it to obtain pretreated glass microspheres.

[0057] S2. The pretreated glass microspheres from step S1 are ultrasonically dispersed in deionized water at 500W for 10 minutes. Calcium hydroxide solution is added until the solution pH is 13. Carbon dioxide gas is continuously introduced at a constant temperature of 50°C until the solution pH remains unchanged at 8.2. The resulting solid particles are removed, dried, and then surface-treated with a titanate coupling agent accounting for 0.5% of the solid particle mass to obtain composite calcium carbonate modified glass microspheres.

[0058] Note: The particle size of the glass microspheres in the above steps is 1.0 μm, and the weight ratio of calcium carbonate to glass microspheres in the composite calcium carbonate modified glass microspheres is 7:5.5.

[0059] Preparation Example 2

[0060] A composite calcium carbonate modified glass microsphere differs from Preparation Example 1 in that the glass microsphere has a particle size of 0.5 μm.

[0061] Preparation Example 3

[0062] A composite calcium carbonate modified glass microsphere, which differs from Preparation Example 1 in that the glass microsphere has a particle size of 1.5 μm.

[0063] Preparation Example 4

[0064] A composite calcium carbonate modified glass microsphere differs from Preparation Example 1 in that the glass microsphere has a particle size of 0.4 μm.

[0065] Preparation Example 5

[0066] A composite calcium carbonate modified glass microsphere differs from Preparation Example 1 in that the glass microsphere has a particle size of 1.6 μm.

[0067] Preparation Example 6

[0068] A composite calcium carbonate modified glass microsphere differs from Preparation Example 1 in that the weight ratio of calcium carbonate to glass microspheres in the composite calcium carbonate modified glass microsphere is 5:3.

[0069] Preparation Example 7

[0070] A composite calcium carbonate modified glass microsphere differs from Preparation Example 1 in that the weight ratio of calcium carbonate to glass microspheres in the composite calcium carbonate modified glass microsphere is 9:8.

[0071] Preparation Example 8

[0072] A composite calcium carbonate modified glass microsphere differs from Preparation Example 1 in that the weight ratio of calcium carbonate to glass microspheres in the composite calcium carbonate modified glass microsphere is 5:2.5.

[0073] Preparation Example 9

[0074] A composite calcium carbonate modified glass microsphere differs from Preparation Example 1 in that the weight ratio of calcium carbonate to glass microspheres in the composite calcium carbonate modified glass microsphere is 9.5:8.

[0075] Preparation Example 10

[0076] A composite calcium carbonate modified glass microsphere differs from Preparation Example 1 in that step S2 is specifically set as follows: the pretreated glass microspheres in step S1 are ultrasonically dispersed in deionized water at 500W for 10min, calcium hydroxide solution is added until the solution pH is 13, carbon dioxide gas is continuously introduced at a constant temperature of 50°C until the solution pH is 8.2 without change, the resulting solid particles are taken out and dried, and then surface treated with 0.5% of titanate coupling agent by mass of solid particles. After that, they are ultrasonically dispersed in deionized water at 500W for 10min, and sodium dodecyl sulfate, methyl methacrylate and initiator are added to react and obtain composite calcium carbonate modified glass microspheres.

[0077] Note: The amount of sodium dodecyl sulfate added accounts for 2.5% of the mass of the solid particles after surface treatment of the titanate coupling agent, the amount of methyl methacrylate accounts for 0.1% of the mass of the solid particles after surface treatment of the titanate coupling agent, and the initiator is carbon tetrachloride, which accounts for 0.25% of the amount of methyl methacrylate.

[0078] Example

[0079] Example 1

[0080] A heat-insulating PVC-coated tent material includes, in sequence, a mounting layer, a PVC coating, a blackened PVC coating, a polyester fiber mesh layer, another blackened PVC coating, a PVC coating, and a mounting layer. The raw materials and their corresponding weights for each component of the PVC coating are shown in Table 1. The material is prepared through the following steps:

[0081] (1) Prepare raw materials including mounting layer, PVC coating, blackened PVC coating and polyester fiber mesh layer according to the proportion. Among them, the raw materials of each component required for PVC coating are mixed evenly to obtain PVC paste.

[0082] (2) After preheating the polyester fiber mesh layer in step (1), blackened PVC paste is applied to both sides. After coagulation and plasticization, the plasticization temperature is 145℃ and the time is 15min to form a blackened PVC coating.

[0083] (3) Apply PVC paste to the blackened PVC coating in step (2), and after coagulation and plasticization, the plasticization temperature is 160℃ and the time is 10min to form a PVC coating.

[0084] (4) Finally, the PVC coating is applied to form a mounting layer, and the heat-insulating PVC coating tent material is obtained.

[0085] Note: The above-mentioned blackened PVC coating is obtained by adding 5% carbon black by weight to PVC paste and then coagulating and plasticizing it; the mounting layer is a PVF film; the polyester fiber mesh layer is 0.2 mm, the blackened PVC coating is 0.3 mm, the PVC coating is 0.3 mm, and the mounting layer is 0.1 mm; the composite calcium carbonate modified glass microspheres used in the PVC coating were obtained in Preparation Example 1, and the plasticizer is dibutyl phthalate.

[0086] Example 2-3

[0087] A heat-insulating PVC-coated tent material differs from Example 1 in that the raw materials of each component of the PVC coating and their corresponding weights are shown in Table 1.

[0088] Table 1. Raw materials and their weight parts (kg / part) for each component of the PVC coating in Examples 1-3

[0089]

[0090] Example 4

[0091] A heat-insulating PVC-coated tent material differs from Example 1 in that the composite calcium carbonate modified glass microspheres used in the PVC coating were obtained in Preparation Example 2.

[0092] Example 5

[0093] A heat-insulating PVC-coated tent material differs from Example 1 in that the composite calcium carbonate-modified glass microspheres used in the PVC coating were obtained in Preparation Example 3.

[0094] Example 6

[0095] A heat-insulating PVC-coated tent material differs from Example 1 in that the composite calcium carbonate modified glass microspheres used in the PVC coating were obtained in Preparation Example 4.

[0096] Example 7

[0097] A heat-insulating PVC-coated tent material differs from Example 1 in that the composite calcium carbonate modified glass microspheres used in the PVC coating were obtained in Preparation Example 5.

[0098] Example 8

[0099] A heat-insulating PVC-coated tent material differs from Example 1 in that the composite calcium carbonate modified glass microspheres used in the PVC coating were obtained in Preparation Example 6.

[0100] Example 9

[0101] A heat-insulating PVC-coated tent material differs from Example 1 in that the composite calcium carbonate modified glass microspheres used in the PVC coating were obtained in Preparation Example 7.

[0102] Example 10

[0103] A heat-insulating PVC-coated tent material differs from Example 1 in that the composite calcium carbonate modified glass microspheres used in the PVC coating were obtained in Preparation Example 8.

[0104] Example 11

[0105] A heat-insulating PVC-coated tent material differs from Example 1 in that the composite calcium carbonate modified glass microspheres used in the PVC coating were obtained in Preparation Example 9.

[0106] Example 12

[0107] A heat-insulating PVC-coated tent material differs from Example 1 in that the composite calcium carbonate modified glass microspheres used in the PVC coating were obtained in Preparation Example 10.

[0108] Example 13

[0109] A heat-insulating PVC-coated tent material differs from Example 1 in that the PVC coating also contains 8.5 parts by weight of functional additives. The functional additives are composed of porous silica and potassium titanate whiskers in a weight ratio of 0.45:1. The porous silica has a particle size of 20 μm, and the potassium titanate whiskers have a diameter of 3.5 μm and a length of 75 μm.

[0110] Example 14

[0111] A heat-insulating PVC coated tent material differs from Example 13 in that the functional additives are added in 5 parts by weight.

[0112] Example 15

[0113] A heat-insulating PVC coated tent material, which differs from Example 13 in that the functional additives are added in 12 parts by weight.

[0114] Example 16

[0115] A heat-insulating PVC coated tent material differs from Example 13 in that the functional additives are composed of porous silica and potassium titanate whiskers in a weight ratio of 0.3:1.

[0116] Example 17

[0117] A heat-insulating PVC coated tent material differs from Example 13 in that the functional additives are composed of porous silica and potassium titanate whiskers in a weight ratio of 0.4:1.

[0118] Example 18

[0119] A heat-insulating PVC coated tent material differs from Example 13 in that the functional additives are composed of porous silica and potassium titanate whiskers in a weight ratio of 0.5:1.

[0120] Example 19

[0121] A heat-insulating PVC coated tent material differs from Example 13 in that the porous silica has a particle size of 10 μm and the potassium titanate whiskers have a diameter of 2 μm and a length of 50 μm.

[0122] Example 20

[0123] A heat-insulating PVC coated tent material differs from Example 13 in that the porous silica has a particle size of 30 μm and the potassium titanate whiskers have a diameter of 5 μm and a length of 00 μm.

[0124] Example 21

[0125] A heat-insulating PVC coated tent material differs from Example 13 in that the functional additives are composed of porous silica and potassium titanate whiskers in a weight ratio of 0.25:1.

[0126] Example 22

[0127] A heat-insulating PVC coated tent material differs from Example 13 in that the functional additives are composed of porous silica and potassium titanate whiskers in a weight ratio of 0.55:1.

[0128] Example 23

[0129] A heat-insulating PVC-coated tent material, which differs from Example 13 in that the functional additives do not contain porous silica.

[0130] Example 24

[0131] A heat-insulating PVC coated tent material, which differs from Example 13 in that the functional additives do not contain potassium titanate whiskers.

[0132] Example 25

[0133] A heat-insulating PVC-coated tent material, which differs from Example 13 in that the porous silica has a particle size of 8 μm.

[0134] Example 26

[0135] A heat-insulating PVC-coated tent material, which differs from Example 13 in that the porous silica has a particle size of 32 μm.

[0136] Example 27

[0137] A heat-insulating PVC coated tent material, which differs from Example 13 in that the potassium titanate whiskers have a diameter of 1.8 μm and a length of 1.5 μm.

[0138] Example 28

[0139] A heat-insulating PVC coated tent material, which differs from Example 13 in that the potassium titanate whiskers have a diameter of 5.2 μm and a length of 45 μm.

[0140] Comparative Example

[0141] Comparative Example 1

[0142] A heat-insulating PVC-coated tent material differs from Example 1 in that the raw materials of the PVC coating do not contain composite calcium carbonate modified glass microspheres.

[0143] Comparative Example 2

[0144] A heat-insulating PVC-coated tent material differs from Example 1 in that the composite calcium carbonate modified glass microspheres in the component raw materials of the PVC coating are replaced by an equal mass of a mixture of calcium carbonate and glass microspheres, and the weight ratio of calcium carbonate to glass microspheres is 7:5.5.

[0145] Comparative Example 3

[0146] A heat-insulating PVC-coated tent material, which differs from Comparative Example 2 in that the raw materials of the PVC coating do not contain calcium carbonate.

[0147] Comparative Example 4

[0148] A heat-insulating PVC-coated tent material, which differs from Comparative Example 1 in that the raw materials of the PVC coating do not contain glass microspheres.

[0149] Performance testing test samples: The heat-insulating PVC coated tent materials obtained in Examples 1-28 were used as test samples 1-28, and the heat-insulating PVC coated tent materials obtained in Comparative Examples 1-4 were used as control samples 1-4.

[0150] Test Method: The thermal insulation performance of test samples 1-28 and control samples 1-4 was tested sequentially using a Linshang LS300 thermal insulation film temperature tester. The LS300 thermal insulation film temperature tester contains a 150W infrared lamp with an imported temperature probe. During testing, the material under test was placed in the center of the test space, and the infrared lamp was turned on. The space above the material simulated outdoor sunlight, while the space below simulated an indoor environment. A larger temperature difference indicated poorer thermal insulation performance. The temperature differences obtained from the tests of test samples 1-28 and control samples 1-4 using the above instrument are recorded in Table 2.

[0151] Table 2 Test results of test samples 1-28 and control samples 1-4

[0152]

[0153]

[0154]

[0155] As can be seen from Example 1 and Comparative Example 1, and Table 2, the composite calcium carbonate modified glass microspheres prepared in this application can significantly improve thermal insulation performance. Furthermore, as can be seen from Comparative Example 2, and Table 2, the composite calcium carbonate modified glass microspheres prepared in this application, compared to a simple mixture of calcium carbonate and glass microspheres, exhibit a significantly higher thermal insulation effect after application, with a substantial difference in the temperature difference measured in the experiment. This indicates that the application of composite calcium carbonate modified glass microspheres can bring about a more prominent and significant effect, demonstrating clear progress. Furthermore, as can be seen from Comparative Examples 3-4, and Table 2, the improvement in thermal insulation performance is effective when using calcium carbonate or glass microspheres alone. Simply mixing the two only results in a simple additive effect. Therefore, it can be seen that the composite calcium carbonate modified glass microspheres prepared in this application can achieve excellent synergistic effects between the two raw materials.

[0156] Based on Examples 1, 4-5, and 6-7, and in conjunction with Table 2, it can be seen that the composite calcium carbonate modified glass microspheres obtained by applying glass microspheres with a particle size of 0.5-1.5 μm exhibit excellent and stable thermal insulation performance after application. However, when the particle size exceeds the above range, the temperature difference of the tent / awning material will increase significantly. The analysis suggests that when the glass microsphere particle size is too small, it affects the deposition effect of calcium carbonate, resulting in an uneven, dense, and continuous calcium carbonate film, which in turn leads to the thermal insulation performance failing to meet expectations.

[0157] Based on Examples 1, 8-9, and 10-11 and Table 2, it can be seen that when the weight ratio of calcium carbonate to glass microspheres in the composite calcium carbonate modified glass microspheres is (5-9):(3-8), the resulting composite calcium carbonate modified glass microspheres exhibit a more excellent and stable heat insulation effect; exceeding the above range will lead to a significant increase in the temperature difference measured in the tent / shed material.

[0158] As can be seen from Examples 1 and 12 and Table 2, when the calcium carbonate film is coated with polymethyl methacrylate, the resulting composite calcium carbonate modified glass microspheres significantly improve the thermal insulation performance of tent materials and significantly reduce the measured temperature difference. This is because the presence of polymethyl methacrylate can effectively counteract the adverse effects of heat transfer on the interfacial bonding stability, thereby enabling the composite calcium carbonate modified glass microspheres to exhibit a more superior and stable thermal insulation effect.

[0159] As can be seen from Examples 1 and 13-20, and Table 2, adding a functional additive composed of porous silica and potassium titanate whiskers in a weight ratio of (0.3-0.5):1 to the PVC coating significantly improves the thermal insulation performance of the tent / awning material and greatly reduces the tested temperature difference. The improvement effect is particularly pronounced when the weight ratio of porous silica to potassium titanate whiskers is 0.45:1. Furthermore, as can be seen from Examples 21-24 and Table 2, the improvement effect of using porous silica or potassium titanate whiskers alone is limited and far less effective than the improvement effect of their combination. When the weight ratio of porous silica to potassium titanate whiskers exceeds the above range, the improvement effect of the thermal insulation performance brought by the functional additive is significantly reduced. Therefore, only by using porous silica and potassium titanate whiskers within a specific mass range can the outstanding thermal insulation improvement effect be achieved in this application. Combined with Examples 25-26 and Table 2, it can be seen that the particle size of porous silica is 10-30 μm, and the diameter of potassium titanate whiskers is 2-5 μm and the length is 50-100 μm, which can ensure the excellent and stable effect of the functional additives. However, when the particle size of porous silica is too small or too large, or when the specifications of potassium titanate whiskers exceed the above range, the thermal insulation performance of the tent material will be significantly reduced. The analysis is that in this case, the thermal insulation network formed is not uniform and stable enough, resulting in the functional additives' improvement effect not meeting expectations and performing relatively poorly.

[0160] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A heat-insulating PVC-coated tent material, comprising, in order, a lining layer, a PVC coating layer, a blackened PVC coating layer, a polyester fiber mesh cloth layer, a blackened PVC coating layer, a PVC coating layer, and a lining layer, characterized in that, The PVC coating comprises the following components by weight: PVC resin 95-105 parts; Plasticizer 60-75 parts; Stabilizer 3-6 parts; Soybean oil 2-4 parts; Titanium white 10-18 parts; Flame retardant 6-15 parts; Anti-UV agent 1-3 parts; Antioxidant 1-2 parts; Mold inhibitor 2.5-4 parts; Composite calcium carbonate modified glass beads 40-80 parts; The composite calcium carbonate modified glass beads are prepared by the following method: S1, immerse the glass bead raw material in an ethanol solution, then add a silane coupling agent, heat and react, then take out and dry to obtain pretreated glass beads; S2, ultrasonically disperse the pretreated glass beads in step S1 in deionized water, add calcium hydroxide solution to make the solution pH 13, constantly introduce carbon dioxide gas at a constant temperature until the solution pH is 8.2, take out the obtained solid particles and dry, then surface treat with a titanate coupling agent to obtain the composite calcium carbonate modified glass beads.

2. The insulated PVC-coated tent material of claim 1, wherein: Step S2 is specifically set as: ultrasonically disperse the pretreated glass beads in step S1 in an aqueous solution, add calcium hydroxide solution, constantly introduce carbon dioxide gas at a constant temperature until the solution pH is unchanged, take out the obtained solid particles and dry, then surface treat with a titanate coupling agent, ultrasonically disperse in deionized water, and add sodium dodecyl sulfate, methyl methacrylate and an initiator to obtain the composite calcium carbonate modified glass beads.

3. The insulated PVC-coated tent material of claim 1, wherein: The particle size of the glass beads is 0.5-1.5 μm, and the weight ratio of calcium carbonate to glass beads in the composite calcium carbonate modified glass beads is (5-9):(3-8).

4. The insulated PVC-coated tent material of claim 1, wherein: The functional additive is composed of porous silica and potassium titanate whiskers, and the weight ratio of porous silica to potassium titanate whiskers is (0.3-0.5):

1.

5. The insulated PVC-coated tent material of claim 4, wherein: The weight ratio of porous silica to potassium titanate whiskers is 0.45:

1.

6. The insulated PVC-coated tent material of claim 4, wherein: The particle size of the porous silica is 10-30 μm, and the diameter of the potassium titanate whisker is 2-5 μm and the length is 50-100 μm.

7. The insulated PVC-coated tent material of claim 1, wherein: The plasticizer is one or a combination of several of dibutyl phthalate, dioctyl phthalate, tricresyl phosphate, triphenyl phosphate and dioctyl sebacate.

8. The process for the preparation of the insulated PVC-coated tent material according to claim 1, characterized by: The steps include: (1) Prepare raw materials including a layer of paste, a PVC coating, a blackened PVC coating, and a polyester fiber mesh layer according to the ratio, wherein the components of the PVC coating are mixed uniformly to obtain a PVC paste; (2) Preheat the polyester fiber mesh layer in step (1), then coat the PVC paste on both sides, and after condensation and plasticization, a blackened PVC coating is formed; (3) Coat the PVC paste on the blackened PVC coating in step (2), and after condensation and plasticization, a PVC coating is formed; (4) Finally, perform a paste treatment on the PVC coating to form a layer of paste, and finally obtain a heat-insulating PVC coating tent material.

Images