Electroless refrigeration coiled material and preparation process thereof

Abstract

The invention relates to the field of membrane materials, and discloses a non-electric refrigeration coiled material and a preparation process thereof, and the non-electric refrigeration coiled material sequentially comprises an anti-ultraviolet layer, an intermediate infrared radiation layer, a porous reflection layer, a secondary reflection layer, a back adhesive layer and a release layer. When the non-electric refrigeration coiled material is prepared, the porous reflecting layer is subjected to hot-melt extrusion and stretched into film thickness, one side of the porous reflecting layer is sequentially coated with the intermediate infrared radiation layer and the ultraviolet layer, the other side of the porous reflecting layer is sequentially coated with the secondary reflecting layer, the back adhesive layer and the release layer, and the non-electric refrigeration coiled material is obtained after drying. The non-electric refrigeration coiled material prepared by the invention has a high reflection ratio to sunlight, obviously reflects the sunlight and reduces the indoor temperature; the radiation rate in the middle infrared band is high, indoor heat can be dissipated to the outer space in a radiation mode, the urban heat island effect is weakened, and meanwhile the service life is long. The problems that an existing cooling material is low in sunlight reflectivity, low in mid-infrared radiance and short in service life are solved, and the cooling material can be widely applied to building surfaces.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of film materials, in particular to a non-electric refrigeration coiled material and a preparation process thereof. BACKGROUND

[0002] With the global warming and the acceleration of urbanization, the building refrigeration energy consumption continues to rise, which has become one of the main sources of urban energy consumption and carbon emissions. The traditional refrigeration mode (such as air conditioner) relies on electric drive, which not only has high energy consumption and high operation cost, but also aggravates the urban heat island effect and greenhouse gas emission. Therefore, developing passive cooling technology without electric drive has become a key direction in the path of building energy saving and carbon neutralization.

[0003] Non-electric refrigeration is a zero-energy and zero-pollution refrigeration technology, which uses wide-spectrum selective precise regulation to achieve the goal of sustainable passive refrigeration by optimizing the optical layer structure to meet the refrigeration demand in multiple scenarios. This technology not only can achieve very high solar reflectance, but also can ensure high mid-infrared emissivity. It can be widely applied to the surface of building roof, such as: color steel tile, cement mortar, concrete, exposed waterproof coiled material, etc., to achieve indoor cooling, reduce energy consumption and carbon dioxide emission.

[0004] However, the existing non-electric refrigeration coiled material still has many technical defects, such as: 1. Low solar reflectance, reflectivity of 60~80%, poor heat insulation performance; 2. Poor aging resistance, short service life; 3. Low mid-infrared emissivity, emissivity ≤80%, which cannot effectively radiate indoor heat. SUMMARY

[0005] The present application mainly proposes a non-electric refrigeration coiled material and a preparation process thereof, which aims to solve the problems of low solar reflectance, low mid-infrared emissivity, poor heat insulation performance, poor aging resistance and short service life in the prior art.

[0006] In one aspect, the present application discloses a non-electric refrigeration coiled material, which is sequentially stacked and arranged to include an ultraviolet-resistant layer, a mid-infrared radiation layer, a porous reflective layer, a secondary reflective layer, a back adhesive layer and a release layer.

[0007] The ultraviolet-resistant layer can block ultraviolet rays and improve the aging resistance of the coiled material, the mid-infrared radiation layer can improve the radiation capacity in the 8~13 mu atmospheric window band, the porous reflective layer can improve the reflectivity of solar light through the porous structure and high refractive index particles, the secondary reflective layer and the porous reflective layer can synergistically reflect the small amount of transmitted solar light back to the external environment, and the back adhesive layer can firmly adhere the non-electric refrigeration coiled material to the surface of the substrate.

[0008] Preferably, the anti-ultraviolet layer comprises 8-15 parts of water-based resin and 0.2-0.5 parts of ultraviolet blocking agent; the water-based resin is one or more of water-based acrylic emulsion, water-based polyurethane emulsion, water-based silicone emulsion and water-based epoxy resin emulsion, and the ultraviolet blocking agent is one or more of benzimidazole sulfonate and benzophenone compounds. The anti-ultraviolet layer has excellent anti-aging property and flexible texture, and can effectively protect the coiled material from ultraviolet radiation as the outermost protective layer, thereby prolonging the service life.

[0009] Preferably, the mid-infrared radiation layer comprises 10-20 parts of chitosan, 1-3 parts of sulfonated cellulose nanowhisker, 0.8-3 parts of acetic acid, 5-10 parts of water solvent, 1-3 parts of calcium chloride and 1-3 parts of silicon dioxide by weight. The mid-infrared radiation layer can effectively improve the infrared emissivity of the atmospheric window in the 8-13 μm wave band and reduce the heat caused by mid-infrared radiation.

[0010] Preferably, the porous reflective layer comprises 10-30 parts of high-refractive particles with a refractive index of ≥1.7, 90-120 parts of thermoplastic resin and 0.5-2 parts of foaming agent by weight. The thermoplastic resin is one or more of PET, PC, PP, PA and PE. The high-refractive particles are one or more of titanium oxide, zirconium oxide and hafnium oxide. The foaming agent is one or more of azodicarbonamide, sodium bicarbonate, N,N-dinitrosopentamethylenetetramine, 4,4'-oxobisbenzenesulfonylhydrazide and p-toluenesulfonylhydrazide. The complex effect between the nanostructure and high-refractive particles in the porous reflective layer can increase the effective reflection cross section of sunlight, increase the reflection times and improve the sunlight reflectance.

[0011] Preferably, the secondary reflective layer comprises 8-15 parts of water-based resin and 2-6 parts of inorganic particles with a particle size of 1-500 nanometers by weight. The water-based resin is one or more of water-based acrylic emulsion, water-based polyurethane emulsion, water-based silicone emulsion and water-based epoxy resin emulsion.

[0012] Preferably, the inorganic particles comprise 0.2-0.6 parts of zinc oxide, 0.2-0.4 parts of silicon oxide, 0.2-0.5 parts of titanium dioxide, 0.2-0.7 parts of zirconium oxide, 0.5-1.5 parts of aluminum oxide, 0.5-1.5 parts of barium sulfate and 0.5-0.7 parts of calcium carbonate by weight. The secondary reflective layer can block a small amount of sunlight that has penetrated the porous reflective layer from further penetrating and reflect it back, thereby further improving the sunlight reflectance.

[0013] Preferably, the material of the back adhesive layer is one of butyl glue, asphalt, SBS modified asphalt, acrylic, organosilicon compound and polyurethane, and the material of the release layer is one of PE, PP, PET and PVC. The back adhesive layer is used for sticking the substrate.

[0014] Preferably, the thickness of the anti-ultraviolet layer is 4-8 mu m, the thickness of the mid-infrared radiation layer is 10-20 mu m, the thickness of the porous reflective layer is 100-300 mu m, the thickness of the secondary reflective layer is 4-10 mu m, and the thickness of the back adhesive layer is 1000-2000 mu m.

[0015] In another aspect, a preparation process of the electroless refrigeration coiled material is disclosed, comprising the following steps: S1, uniformly mixing components of the porous reflective layer, hot melt extruding the porous reflective layer, and obtaining the porous reflective layer through a bidirectional stretching process; S2, coating the mid-infrared radiation layer and the anti-ultraviolet layer on one side of the porous reflective layer in sequence, coating the secondary reflective layer, the back adhesive layer and the release layer on the other side of the porous reflective layer in sequence, drying each layer after coating, and finally obtaining the electroless refrigeration coiled material.

[0016] The electroless refrigeration coiled material of the present application has the following advantages: the anti-ultraviolet layer is designed as an anti-aging layer to reduce the influence of ultraviolet rays and improve the service life of the coiled material; the mid-infrared radiation layer improves the emissivity of the mid-infrared in the 8-13 mu m band of the atmospheric window, radiates indoor heat to outer space, and reduces the urban heat island effect; the nano-porous structure and high refractive index particles in the porous reflective layer increase the effective reflection cross section of sunlight, improve the reflectivity, increase the sunlight reflectance, cooperate with the secondary reflective layer, reflect a small amount of sunlight that penetrates the porous reflective layer back to the external environment, have high sunlight reflectance, can insulate sunlight, and reduce indoor temperature. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other related drawings according to these drawings without creating any creative labor.

[0018] Figure 1 The figure is a structural schematic diagram of the electroless refrigeration coiled material.

[0019] In the drawings: 1-anti-ultraviolet layer, 2-mid-infrared radiation layer, 3-porous reflective layer, 4-secondary reflective layer, 5-back adhesive layer and release layer. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application. It should be noted that the embodiments and features in the embodiments can be combined with each other without conflict. Meanwhile, the raw materials mentioned below are not specifically described, which are all commercially available products; and the process steps or preparation processes not specifically mentioned are all known to those skilled in the art.

[0021] Embodiment 1 S1, take PE resin 5000g, titanium oxide 950g and azodicarbonamide 50g, uniformly mix, hot melt extrusion and stretch into a porous reflective layer with a thickness of 200μm.

[0022] S2, take chitosan 800g, sulfonated cellulose nanowhisker 100g, silicon dioxide 50g, acetic acid 40g, water 250g and calcium chloride 80g, uniformly mix, use coating process to coat 20μm on the porous reflective layer, then solidify, dry at 120℃ for 10 minutes to obtain a mid-infrared radiation layer.

[0023] S3, take water-based acrylic emulsion 500g and 2-phenyl benzimidazole-5-sulfonic acid 10g, uniformly mix, use coating process to coat 5μm on the mid-infrared radiation layer, then solidify, dry at 120℃ for 8 minutes to obtain an ultraviolet resistant layer.

[0024] S4, take water-based acrylic emulsion 500g, zinc oxide 25g, silicon oxide 10g, titanium dioxide 20g, zirconium oxide 20g, aluminum oxide 40g, barium sulfate 50g and calcium carbonate 30g, uniformly mix, use coating process to coat 6μm on the porous reflective layer, then solidify, dry at 120℃ for 8 minutes to obtain a secondary reflective layer.

[0025] S5, coat butyl glue 1500μm on the secondary reflective layer, after solidification by drying at 70℃ for 20 minutes, bond with PE release paper, finally obtain an electroless refrigeration roll material.

[0026] Embodiment 2 S1, take PP resin 5000g, titanium oxide 800g and sodium bicarbonate 50g, uniformly mix, hot melt extrusion and stretch into a porous reflective layer with a thickness of 200μm.

[0027] S2, take chitosan 800g, sulfonated cellulose nanowhisker 100g, silica 80g, acetic acid 40g, water 250g and calcium chloride 80g, after mixing uniformly, using coating process on the porous reflective layer coated 15μm, then curing, drying at 120℃ for 10 minutes to obtain the mid-infrared radiation layer.

[0028] S3, take water-based polyurethane emulsion 500g and 2-phenyl benzimidazole-5-sulfonic acid 10g, after mixing uniformly, using coating process on the mid-infrared radiation layer coated 5μm, then curing, drying at 120℃ for 8 minutes to obtain the anti-ultraviolet layer.

[0029] S4, take water-based acrylic emulsion 500g, zinc oxide 20g, silicon oxide 10g, titanium dioxide 25g, zirconium oxide 25g, aluminum oxide 50g, barium sulfate 40g and calcium carbonate 30g, after mixing uniformly, using coating process on the porous reflective layer coated 6μm, then curing, drying at 120℃ for 8 minutes to obtain the secondary reflective layer.

[0030] S5, asphalt is coated on the secondary reflective layer 1500μm, after curing by drying at 70℃ for 20 minutes, PE release paper is attached, finally obtaining the no-electricity refrigeration coiled material.

[0031] Example 3 S1, take PET resin 5000g, titanium oxide 1000g and p-toluenesulfonyl hydrazide 50g, after mixing uniformly, hot melt extrusion and stretching into the porous reflective layer with thickness of 200μm.

[0032] S2, take chitosan 800g, sulfonated cellulose nanowhisker 120g, silica 80g, acetic acid 40g, water 250g and calcium chloride 80g, after mixing uniformly, using coating process on the porous reflective layer coated 15μm, then curing, drying at 120℃ for 10 minutes to obtain the mid-infrared radiation layer.

[0033] S3, take water-based polyurethane emulsion 500g and 2-phenyl benzimidazole-5-sulfonic acid 20g, after mixing uniformly, using coating process on the mid-infrared radiation layer coated 5μm, then curing, drying at 120℃ for 8 minutes to obtain the anti-ultraviolet layer.

[0034] S4, take water-based acrylic emulsion 500g, zinc oxide 25g, silicon oxide 10g, titanium dioxide 25g, zirconium oxide 30g, aluminum oxide 50g, barium sulfate 50g and calcium carbonate 30g, after mixing uniformly, using coating process on the porous reflective layer coated 6μm, then curing, drying at 120℃ for 8 minutes to obtain the secondary reflective layer.

[0035] S5, asphalt is coated on the secondary reflection layer 1500 pm, after drying at 70℃ for 20 minutes and curing, PE release paper is attached, and finally an electroless refrigeration coiled material is obtained.

[0036] Example 4 S1, PC resin 5000g, titanium oxide 1000g, and p-nitro, n-nitrosopentamethylene tetramine 50g are mixed uniformly, then hot melt extrusion and stretching are performed to form a porous reflection layer with a thickness of 200 pm.

[0037] S2, chitosan 800g, sulfonated cellulose nanowhisker 120g, silicon dioxide 80g, acetic acid 40g, water 250g, and calcium chloride 80g are mixed uniformly, then a coating process is used to coat 15 pm on the porous reflection layer, followed by curing and drying at 120℃ for 10 minutes to obtain a mid-infrared radiation layer.

[0038] S3, water-based polyurethane emulsion 500g and 2-phenyl benzimidazole-5-sulfonic acid 15g are mixed uniformly, then a coating process is used to coat 5 pm on the mid-infrared radiation layer, followed by curing and drying at 120℃ for 8 minutes to obtain an ultraviolet-resistant layer.

[0039] S4, water-based acrylic emulsion 500g, zinc oxide 30g, silicon oxide 20g, titanium dioxide 25g, zirconium oxide 35g, aluminum oxide 50g, barium sulfate 60g, and calcium carbonate 30g are mixed uniformly, then a coating process is used to coat 6 pm on the porous reflection layer, followed by curing and drying at 120℃ for 8 minutes to obtain a secondary reflection layer.

[0040] S5, asphalt is coated on the secondary reflection layer 1500 pm, after drying at 70℃ for 20 minutes and curing, PE release paper is attached, and finally an electroless refrigeration coiled material is obtained.

[0041] Example 5 S1, PA resin 5000g, hafnium oxide 1000g, and 4,4'-oxobisbenzenesulfonyl hydrazide 50g are mixed uniformly, then hot melt extrusion and stretching are performed to form a porous reflection layer with a thickness of 200 pm.

[0042] S2, chitosan 800g, sulfonated cellulose nanowhisker 100g, silicon dioxide 80g, acetic acid 40g, water 250g, and calcium chloride 80g are mixed uniformly, then a coating process is used to coat 15 pm on the porous reflection layer, followed by curing and drying at 120℃ for 10 minutes to obtain a mid-infrared radiation layer.

[0043] S3, water-based polyurethane emulsion 500g and 2-phenyl benzimidazole-5-sulfonic acid 15g are mixed uniformly, then a coating process is used to coat 5 pm on the mid-infrared radiation layer, followed by curing and drying at 120℃ for 8 minutes to obtain an ultraviolet-resistant layer.

[0044] S4, take water-based acrylic emulsion 500g, zinc oxide 30g, silicon dioxide 10g, titanium dioxide 30g, zirconium oxide 40g, aluminum oxide 50g, barium sulfate 50g and calcium carbonate 30g, after mixing uniformly, using coating process on the porous reflective layer 6μm, then curing, drying at 120℃ for 8 minutes to obtain secondary reflective layer.

[0045] S5, asphalt is coated on the secondary reflective layer 1500μm, after curing by drying at 70℃ for 20 minutes, PE release paper is attached, and finally the electroless refrigeration coiled material is obtained.

[0046] Example 6 S1, take PET resin 5000g, zirconium oxide 1250g and azodicarbonamide 80g, after mixing uniformly, hot melt extrusion and stretching into a porous reflective layer with a thickness of 200μm.

[0047] S2, take chitosan 800g, sulfonated cellulose nanowhisker 150g, silicon dioxide 100g, acetic acid 40g, water 250g and calcium chloride 80g, after mixing uniformly, using coating process on the porous reflective layer 15μm, then curing, drying at 120℃ for 10 minutes to obtain a mid-infrared radiation layer.

[0048] S3, take water-based polyurethane emulsion 500g and 2,4-dihydroxybenzophenone 25g, after mixing uniformly, using coating process on the mid-infrared radiation layer 5μm, then curing, drying at 120℃ for 8 minutes to obtain an ultraviolet resistant layer.

[0049] S4, take water-based acrylic emulsion 500g, zinc oxide 40g, silicon dioxide 10g, titanium dioxide 25g, zirconium oxide 30g, aluminum oxide 60g, barium sulfate 80g and calcium carbonate 30g, after mixing uniformly, using coating process on the porous reflective layer 6μm, then curing, drying at 120℃ for 8 minutes to obtain a secondary reflective layer.

[0050] S5, asphalt is coated on the secondary reflective layer 1500μm, after curing by drying at 70℃ for 20 minutes, PE release paper is attached, and finally the electroless refrigeration coiled material is obtained.

[0051] The test data is shown in Table 1. In the examples, the solar reflectance is tested according to the JG / T 235-2014 standard using an ultraviolet-visible-near-infrared spectrophotometer, and the mid-infrared emissivity is tested according to the GB / T 30127-2013 using a Fourier transform infrared spectrometer. The artificial accelerated aging performance is tested according to the GB / T 18244-2022: Artificial climate accelerated aging method using fluorescent ultraviolet lamp for aging test.

[0052] Table 1 From the above example data, the solar reflectance of the electroless refrigeration coil of the present application can reach more than 88%, and the highest can reach 96%, and the mid-infrared emissivity can reach more than 92%, and the highest can reach 96%, because the synergistic effect between the multi-layer structure achieves this effect. The materials in the mid-infrared radiation layer, chitosan, sulfonated cellulose nanowhisker, calcium chloride and silicon dioxide, can effectively realize high radiation after absorbing mid-infrared light in the atmospheric window area of 8~13μm. The nanoscale pores formed by high refractive index molecules in the porous reflective layer can make the sunlight realize multiple scattering and superposition, and then superimpose the secondary reflection layer to cooperate with the sunlight that penetrates the porous reflective layer to bounce back to the porous layer, forming secondary reflection, and finally the solar reflectance can reach 96%.

[0053] Comparative Example 1 The difference between Comparative Example 1 and Example 5 is only that the anti-ultraviolet layer is not prepared in the present comparative example.

[0054] Comparative Example 2 The difference between Comparative Example 2 and Example 5 is only that the secondary reflection layer is not prepared in the present comparative example.

[0055] Comparative Example 3 The difference between Comparative Example 3 and Example 5 is only that the porous reflective layer is not prepared in the present comparative example.

[0056] Comparative Example 4 The difference between Comparative Example 4 and Example 5 is only that the porous reflective layer and the secondary reflection layer are not prepared in the present comparative example.

[0057] Comparative Example 5 The difference between Comparative Example 5 and Example 5 is only that the mid-infrared radiation layer is not prepared in the present comparative example.

[0058] The test data in the comparative examples are shown in Table 2.

[0059] Table 2 From the data of the comparative examples, the reflectance of sunlight is mainly provided by the porous reflective layer, and the reflection effect of a single layer can achieve a sunlight reflectance close to 90%. However, the sunlight reflectance of a single secondary reflection layer is only 66%, which may be mainly due to the fact that there are fewer inorganic particles in the secondary reflection and the thickness is thinner. The mid-infrared radiation effect is the combined action of the porous reflective layer, the secondary reflection layer and the mid-infrared radiation layer. From the data, the coiled material of the present application still has an 80% mid-infrared radiation rate without the mid-infrared radiation layer, because the resin and inorganic particles of the porous reflective layer and the secondary reflection layer also cover a part of the mid-infrared radiation band, helping to improve the radiation rate. From the aging performance, when there is only a porous reflective layer and a secondary reflection layer, the coiled material is prone to accelerated aging, because without the protection of the ultraviolet-resistant layer, the entire coiled material is exposed to ultraviolet radiation, resulting in rapid aging.

[0060] For the coiled material in Example 5, the thickness between the film layers was changed and the effect was tested, the thickness data is shown in Table 3, and the test data is shown in Table 4.

[0061] Table 3 Table 4 On the other hand, the thickness of the coiled material also has a certain influence on the effect of the coiled material. Example 5 shows that when the thickness of the porous reflective layer reaches 300 μm, there is no improvement in the sunlight reflectance. When the thickness of the secondary reflection layer reaches 10 μm, the sunlight reflectance of Example 5 reaches 95%, and when the thickness of the mid-infrared radiation layer reaches 20 μm, the mid-infrared radiation rate of the coiled material will not be further increased. For the anti-aging performance of the coiled material, the thickness of the mid-infrared radiation layer and the porous reflective layer has no great influence on it, which shows that the anti-aging property mainly depends on the thickness of the ultraviolet-resistant layer.

[0062] Example 7 The difference between Example 7 and Example 5 is that in step S2, 800 g of chitosan, 100 g of hydroxypropyl methyl cellulose, 80 g of silicon dioxide, 40 g of acetic acid and 80 g of calcium chloride are mixed uniformly, and then a coating process is used to coat 15 μm on the porous reflective layer, and then curing is carried out, and the coiled material is dried at 120°C for 10 minutes to obtain the mid-infrared radiation layer.

[0063] Example 8 The difference between Example 8 and Example 5 is that in step S2, 800 g of chitosan, 100 g of sulfonated cellulose nanowhiskers, 40 g of acetic acid are mixed uniformly, and then a coating process is used to coat 15 μm on the porous reflective layer, and then curing is carried out, and the coiled material is dried at 120°C for 10 minutes to obtain the mid-infrared radiation layer.

[0064] The test data of Example 7 and Example 8 are shown in Table 5.

[0065] Table 5 From the data of Example 7 and Example 8, it can be analyzed that the mid-infrared emissivity of the present embodiment is reduced by about 10% by using hydroxypropyl methyl cellulose to replace sulfonated cellulose nanowhiskers. Because the sulfonic acid group introduced after sulfonation of the cellulose nanowhisker produces a strong absorption peak in the mid-infrared radiation region, the whisker structure cooperates with calcium chloride and silicon dioxide to form a hierarchical nano-pore structure, which optimizes the mid-infrared radiation effect of the material and enhances the mid-infrared radiation capacity.

[0066] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A non-electrically cooled roll material, characterized in that, The layers are stacked sequentially, including an anti-ultraviolet layer, a mid-infrared radiation layer, a porous reflective layer, a secondary reflective layer, an adhesive layer, and a release layer.

2. The non-electric cooling roll material as described in claim 1, characterized in that, The UV-resistant layer comprises 8-15 parts of water-based resin and 0.2-0.5 parts of UV blocker by weight. The aqueous resin is one or more of the following: aqueous acrylic emulsion, aqueous polyurethane emulsion, aqueous silicone emulsion, and aqueous epoxy resin emulsion. The ultraviolet blocking agent is one or more of benzimidazole sulfonate and benzophenone compounds.

3. The non-electric cooling roll material as described in claim 1, characterized in that, By weight, the mid-infrared radiation layer comprises 10-20 parts chitosan, 1-3 parts sulfonated cellulose nanofibers, 0.8-3 parts acetic acid, 5-10 parts water solvent, 1-3 parts calcium chloride, and 1-3 parts silicon dioxide.

4. The non-electric cooling roll material as described in claim 1, characterized in that, By weight, the porous reflective layer comprises 10-30 parts of high-refractive-index particles, 90-120 parts of thermoplastic resin, and 0.5-2 parts of foaming agent; The thermoplastic resin is one or more of PET, PC, PP, PA, and PE; The high-refractive-index particles are one or more of titanium oxide, zirconium oxide, and hafnium oxide; The foaming agent is one or more of azodicarbonamide, sodium bicarbonate, N,N-dinitrospentamethylenetetramine, 4,4'-oxobis(benzenesulfonylhydrazine) and p-toluenesulfonylhydrazine.

5. The non-electrically cooled roll material as described in claim 4, characterized in that, The refractive index of the high-refractive-index particles is ≥1.

7.

6. The non-electrically cooled roll material as described in claim 1, characterized in that, By weight, the secondary reflective layer comprises 8-15 parts of water-based resin and 2-6 parts of inorganic particles with a particle size of 1-500 nanometers. The aqueous resin is one or more of the following: aqueous acrylic emulsion, aqueous polyurethane emulsion, aqueous silicone emulsion, and aqueous epoxy resin emulsion.

7. The non-electrically cooled roll material as described in claim 6, characterized in that, The inorganic particles, by weight fraction, include: 0.2-0.6 parts zinc oxide, 0.2-0.4 parts silicon oxide, 0.2-0.5 parts titanium dioxide, 0.3-0.7 parts zirconium oxide, 0.5-1.5 parts aluminum oxide, 0.5-1.5 parts barium sulfate, and 0.5-0.7 parts calcium carbonate.

8. The non-electrically cooled roll material as described in claim 1, characterized in that, The adhesive backing layer is made of one of the following materials: butyl rubber, asphalt, SBS modified asphalt, acrylic acid, organosilicon compounds, and polyurethane. The release layer is made of one of the following materials: PE, PP, PET, and PVC.

9. The non-electric cooling roll material as described in claim 1, characterized in that, The thickness of the UV-resistant layer is 4~8μm, the thickness of the mid-infrared radiation layer is 10~20μm, the thickness of the porous reflective layer is 100~300μm, the thickness of the secondary reflective layer is 4~10μm, and the thickness of the adhesive layer is 1000~2000μm.

10. A process for preparing an electro-cooled roll material, characterized in that, The method for preparing the non-electrically cooled roll material as described in any one of claims 1 to 9 includes the following steps: S1. A porous reflective layer is prepared using a film-forming process; S2. A mid-infrared radiation layer and an anti-ultraviolet layer are sequentially coated on one side of the porous reflective layer, and a secondary reflective layer, an adhesive layer, and a release layer are sequentially coated on the other side of the porous reflective layer.

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