Thermal insulation material, door sealing strip and refrigeration equipment

Abstract

The embodiment of the invention provides a thermal insulation material, a door seal and refrigeration equipment. The thermal insulation material comprises the following components in parts by weight: 80-95 parts of a first composition and 5-20 parts of a second composition, wherein the first composition is prepared from the following components in parts by weight: 90 to 110 parts of PVC (Polyvinyl Chloride) resin, 45 to 65 parts of plasticizer, 0.1 to 1.5 parts of cross-linking agent, 5 to 10 parts of heat stabilizer, 20 to 30 parts of inorganic filler, 0.2 to 0.4 part of lubricant and 0.5 to 1.5 parts of antibacterial and mildew-proof agent; the second composition is prepared from the following components in parts by weight: 55 to 65 parts of styrene block copolymer, 20 to 45 parts of foaming agent, 1 to 4 parts of zinc stearate, 2 to 4 parts of stearic acid, 17 to 25 parts of white oil and 15 to 20 parts of polypropylene. The thermal insulation material provided by the embodiment of the invention can be used for preparing the door sealing strip, and the prepared door sealing strip can realize a relatively good sealing effect and a relatively good thermal insulation effect, so that the energy consumption of the refrigerator can be reduced.

Description

Technical Field

[0001] This application relates to the field of polymer materials, and particularly to a thermal insulation material, a door seal strip and a refrigeration device. Background Art

[0002] A refrigerator is a refrigeration device that maintains a constant low temperature, capable of keeping food or other items in a constant low-temperature cold state. The refrigerator door is an important part of the refrigerator. It cooperates with the box body to form an openable and closable enclosed storage space. To improve the thermal insulation effect of the refrigerator itself, a door seal strip is generally provided on the side of the refrigerator door body facing the box body, and the seal between the refrigerator door body and the box body is achieved through the door seal strip; however, the existing door seal strip has a relatively large thermal conductivity coefficient and a poor thermal insulation effect, resulting in more loss of cold in the refrigerator, and further leading to a large energy consumption of the refrigerator. Summary of the Invention

[0003] Based on this, the embodiments of this application provide a thermal insulation material, a door seal strip and a refrigeration device.

[0004] In a first aspect, the embodiments of this application provide a thermal insulation material. By weight, the thermal insulation material includes 80 - 95 parts of a first composition and 5 - 20 parts of a second composition;

[0005] Among them, by weight, the first composition includes 90 - 110 parts of PVC resin, 45 - 65 parts of plasticizer, 0.1 - 1.5 parts of crosslinking agent, 5 - 10 parts of heat stabilizer, 20 - 30 parts of inorganic filler, 0.2 - 0.4 parts of lubricant, and 0.5 - 1.5 parts of antibacterial and mildew-proof agent;

[0006] By weight, the second composition includes 55 - 65 parts of styrenic block copolymer, 20 - 45 parts of foaming agent, 1 - 4 parts of zinc stearate, 2 - 4 parts of stearic acid, 17 - 25 parts of white oil, and 15 - 20 parts of polypropylene.

[0007] In some embodiments, the styrenic block copolymer includes at least one of SEEPS, SBS, and SEBS; and / or,

[0008] The styrene content in the styrenic block copolymer is 30wt% - 40wt%; and / or,

[0009] The weight-average molecular weight of the styrenic block copolymer is 60,000 - 100,000.

[0010] In some embodiments, the plasticizer includes at least one of dioctyl terephthalate, trioctyl trimellitate, citrate plasticizer, and epoxidized soybean oil; and / or,

[0011] The crosslinking agent includes trimethylolpropane trimethacrylate; and / or,

[0012] The heat stabilizer includes at least one of a calcium-zinc heat stabilizer and a rare-earth heat stabilizer.

[0013] In some embodiments, the inorganic filler includes at least one of barium sulfate, calcium carbonate, and hollow glass microspheres; and / or,

[0014] The average particle size of the inorganic filler is 1 μm to 100 μm.

[0015] In some embodiments, the average particle size of the hollow glass microspheres is 5 μm to 100 μm; and / or,

[0016] The wall thickness of the hollow glass microspheres is 1 μm to 10 μm; and / or,

[0017] The material of the hollow glass microspheres includes at least one of silicon dioxide, aluminum oxide, zirconium oxide, magnesium oxide, and sodium silicate.

[0018] In some embodiments, the lubricant includes at least one of stearic acid, Fischer-Tropsch wax, and oleamide; and / or,

[0019] The antibacterial and mildew-proof agent includes at least one of nano zinc and zinc phosphate; and / or,

[0020] The foaming agent includes a microsphere foaming agent.

[0021] In some embodiments, the microsphere foaming agent includes at least one of microsphere foaming agent F-230D, microsphere foaming agent F-260D, and Expancel microspheres.

[0022] In a second aspect, an embodiment of the present application provides a door seal strip, including the thermal insulation material as described above.

[0023] In a third aspect, an embodiment of the present application provides a refrigeration device, including the door seal strip as described above.

[0024] In some embodiments, the refrigeration device includes a box body and a door body. The box body has a refrigerating compartment, the door body can be installed on the box body to open and close the refrigerating compartment, the door seal strip is provided on one side of the door body facing the box body, and / or, the door seal strip is provided on one side of the box body facing the door body.

[0025] The thermal insulation material provided by the embodiments of the present application is obtained by mixing a first composition and a second composition. The first composition includes PVC resin, plasticizer, crosslinking agent, heat stabilizer, inorganic filler, lubricant, antibacterial and mildew-proof agent, and the second composition includes styrene block copolymer, foaming agent, zinc stearate, stearic acid, white oil, and polypropylene. Through the combination of the above components, a thermal insulation material with good resilience and good thermal insulation effect is obtained. This thermal insulation material can be used to prepare door seals, and the prepared door seals can achieve good sealing and thermal insulation effects. Therefore, the loss of cold in the refrigerator can be reduced, and the energy consumption of the refrigerator can be further reduced. Detailed Embodiments

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0027] In the present application, "and / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Where A and B can be singular or plural.

[0028] In the present application, "at least one" means one or more, and "a plurality" means two or more. "At least one kind", "at least one item (piece) below" or similar expressions refer to any combination of these items, including any combination of single item (piece) or plural items (pieces). For example, "at least one item (piece) among a, b, or c", or, "at least one item (piece) among a, b, and c" can all represent: a, b, c, a + b, a + c, b + c, or a + b + c, where a, b, and c can be single or multiple respectively.

[0029] "Parts by weight" refers to the basic measurement unit representing the mass ratio relationship of multiple components. 1 part can represent any unit mass, such as 1g, 1Kg, or can also represent 2g, 2Kg, etc. Suppose we say that the parts by weight of component A is a parts, and the parts by weight of component B is b parts, then it means the mass ratio of component A to component B is a:b. Or, it means the mass of component A is aK, and the mass of component B is bK (K is any number representing a multiple factor). It should not be misunderstood that, different from the parts by weight, the sum of the parts by weight of all components is not limited to 100 parts.

[0030] The various embodiments of the present application may exist in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be construed as a rigid limitation on the scope of the present application; therefore, it should be considered that the description of the said range has specifically disclosed all possible sub-ranges and individual values within the range. For example, it should be considered that the description of the range from 1 to 6 has specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and individual numbers within the range, such as 1, 2, 3, 4, 5, and 6. Additionally, whenever a numerical range is indicated herein, it means including any cited number (fraction or integer) within the indicated range.

[0031] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0032] An embodiment of the present application provides a thermal insulation material. By weight, the thermal insulation material includes 80 - 95 parts of a first composition and 5 - 20 parts of a second composition;

[0033] Wherein, by weight, the first composition includes 90 - 110 parts of PVC resin, 45 - 65 parts of plasticizer, 0.1 - 1.5 parts of crosslinking agent, 5 - 10 parts of heat stabilizer, 20 - 30 parts of inorganic filler, 0.2 - 0.4 parts of lubricant, and 0.5 - 1.5 parts of antibacterial and mildew-proof agent;

[0034] By weight, the second composition includes 55 - 65 parts of styrene block copolymer, 20 - 45 parts of foaming agent, 1 - 4 parts of zinc stearate, 2 - 4 parts of stearic acid, 17 - 25 parts of white oil, and 15 - 20 parts of polypropylene (PP).

[0035] Exemplarily, by weight, in the thermal insulation material, the number of parts of the first composition can be 80 parts, 85 parts, 88 parts, 90 parts, 93 parts, 95 parts, etc., and the number of parts of the second composition can be 5 parts, 8 parts, 10 parts, 13 parts, 15 parts, 20 parts, etc.

[0036] Exemplarily, in parts by weight, in the first composition, the parts of PVC resin can be 90 parts, 95 parts, 100 parts, 105 parts, 110 parts, etc., the parts of plasticizer can be 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, etc., the parts of crosslinking agent can be 0.1 part, 0.3 part, 0.5 part, 0.8 part, 1 part, 1.3 parts, 1.5 parts, etc., the parts of heat stabilizer can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc., the parts of inorganic filler can be 20 parts, 22 parts, 25 parts, 28 parts, 30 parts, etc., the parts of lubricant can be 0.2 part, 0.25 part, 0.3 part, 0.35 part, 0.4 part, etc., and the parts of antibacterial and mildew-proof agent can be 0.5 part, 0.8 part, 1 part, 1.3 parts, 1.5 parts.

[0037] Exemplarily, in parts by weight, in the second composition, the parts of styrenic block copolymer can be 55 parts, 58 parts, 60 parts, 63 parts, 65 parts, etc., the parts of foaming agent can be 20 parts, 25 parts, 30 parts, 35 parts, 50 parts, 45 parts, etc., the parts of zinc stearate can be 1 part, 2 parts, 3 parts, 4 parts, etc., the parts of stearic acid can be 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, etc., the parts of white oil can be 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, etc., and the parts of polypropylene can be 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0038] The thermal insulation material provided by the embodiments of the present application is obtained by mixing the first composition and the second composition. Among them, the first composition includes PVC resin, plasticizer, crosslinking agent, heat stabilizer, inorganic filler, lubricant, antibacterial and mildew-proof agent, and the second composition includes styrenic block copolymer, foaming agent, zinc stearate, stearic acid, white oil, polypropylene. Through the combination of the above components, a thermal insulation material with better resilience performance and better thermal insulation effect is obtained. This thermal insulation material can be used to prepare door seals, and the prepared door seals can achieve better sealing effect and better thermal insulation effect. Therefore, the loss of cold energy inside the refrigerator can be reduced, and thus the energy consumption of the refrigerator can be lowered.

[0039] Exemplarily, the styrenic block copolymer includes at least one of SEEPS, SBS, and SEBS.

[0040] It should be noted that SEEPS is a hydrogenated styrene block copolymer obtained by selective hydrogenation of styrene-b-polybutadiene / polyisoprene-b-polystyrene, and its Chinese name is polystyrene-b-poly(ethylene / ethylene / propylene)-b-polystyrene.

[0041] SEBS (Styrene Ethylene Butylene Styrene, hydrogenated styrene-butadiene block copolymer) is a linear triblock copolymer with a polystyrene end segment and an ethylene-butene copolymer obtained by hydrogenating polybutadiene as the middle elastic block.

[0042] SBS (Styrenic Block Copolymers, styrene-butadiene-styrene block copolymer) is a triblock copolymer with styrene and butadiene as monomers.

[0043] In the embodiments of the present application, SEEPS, SBS, and SEBS are all purchased from Kureha Corporation of Japan.

[0044] Exemplarily, the styrene content in the styrenic block copolymer is 30 wt% - 40 wt%.

[0045] Exemplarily, the weight-average molecular weight of the styrenic block copolymer is 60,000 - 100,000.

[0046] Exemplarily, the plasticizer includes at least one of dioctyl terephthalate (DOTP), trioctyl trimellitate (TOTM), citrate plasticizer, and epoxidized soybean oil.

[0047] Exemplarily, the crosslinking agent includes trimethylolpropane trimethacrylate.

[0048] Exemplarily, the heat stabilizer includes at least one of calcium-zinc (Ca-Zn) heat stabilizer and rare earth heat stabilizer.

[0049] Exemplarily, the inorganic filler includes at least one of barium sulfate, calcium carbonate, and hollow glass microspheres.

[0050] Exemplarily, the average particle size of the inorganic filler is 1 μm - 100 μm, such as 1 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, etc.

[0051] Exemplarily, the average particle size of the hollow glass microspheres is 5 μm - 100 μm, such as 5 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, etc.

[0052] Exemplarily, the wall thickness of the hollow glass microspheres is 1 μm to 10 μm, such as 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, etc.

[0053] Exemplarily, the material of the hollow glass microspheres includes at least one of silica, alumina, zirconia, magnesia, and sodium silicate.

[0054] Exemplarily, the lubricant includes at least one of stearic acid, Fischer-Tropsch wax, and oleamide.

[0055] Exemplarily, the antibacterial and mildew-proof agent includes at least one of nano zinc and zinc phosphate.

[0056] Exemplarily, the average particle size of the nano zinc is 0.1 μm to 4 μm, such as 0.1 μm, 0.5 μm, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, etc.

[0057] Exemplarily, the foaming agent includes a microsphere foaming agent.

[0058] Exemplarily, the microsphere foaming agent is a spherical plastic particle with a core-shell structure, the outer shell is a thermoplastic acrylic resin polymer, and the inner core is an alkane gas; the average particle size of the microsphere foaming agent is 10 - 50 microns, and after heating, the volume of the microsphere foaming agent can rapidly expand to dozens of times its own size, thus achieving the foaming effect.

[0059] Exemplarily, the microsphere foaming agent includes at least one of microsphere foaming agent F-230D, microsphere foaming agent F-260D, and Expancel microspheres.

[0060] Exemplarily, the Expancel microspheres are purchased from AkzoNobel, model 951DU120, with an outer shell of an acrylic copolymer and an inner part of a low-boiling hydrocarbon, and the foaming temperature is 150°C - 170°C.

[0061] Exemplarily, both the microsphere foaming agent F-230D and the microsphere foaming agent F-260D are purchased from Matsumoto Yushi Seiyaku Co., Ltd. of Japan.

[0062] Exemplarily, the preparation steps of the first composition (PVC masterbatch) include: uniformly mixing the weighed PVC resin with a heat stabilizer and an antibacterial and mildew-proof agent under the stirring of a high-speed mixer; adding a plasticizer and heating to 100°C while continuously stirring, and stirring at a speed of 1500 - 2000 r / min for 20 min; adding an inorganic filler and a lubricant while continuously stirring and heating to 120°C; adding a crosslinking agent for crosslinking reaction and continuously stirring for 15 - 20 min; cooling the uniformly mixed material to 70 - 75°C and then adding it to a twin-screw extruder for pelletizing.

[0063] Exemplarily, the preparation steps of the second composition (styrenic block copolymer microcellular masterbatch) include: fully mixing the styrenic block copolymer, white oil, and PP evenly, standing for 8 h, then adding a blowing agent, zinc stearate, and stearic acid, heating the temperature to 90 °C, stirring the materials evenly, and then extruding and pelletizing through a twin-screw extruder.

[0064] Exemplarily, the preparation steps of the thermal insulation material include: adding the first composition (PVC masterbatch) and the second composition (styrenic block copolymer microcellular masterbatch) into a twin-screw extruder in proportion. The extrusion temperature is 130 - 160 °C. The screw diameter of the twin-screw extruder is 20 mm, and the length-diameter ratio (L / D) is 32. After the extruded thermal insulation material is cut to size, it is left standing for 12 h, and then processes such as threading magnetic strips and welding can be carried out to make a door seal strip.

[0065] The embodiment of the present application further provides a door seal strip, including the thermal insulation material in any of the above embodiments.

[0066] The embodiment of the present application further provides a refrigeration device, including the door seal strip in any of the above embodiments.

[0067] Exemplarily, the refrigeration device includes a box body and a door body. The box body has a refrigerating compartment. The door body is rotatably installed on the box body to open and close the refrigerating compartment. On one side of the door body facing the box body, there is provided the door seal strip, and / or, on one side of the box body facing the door body, there is provided the door seal strip, so that when the door body is installed on the box body, a sealed state is maintained between the door body and the box body to avoid the loss of cold inside the refrigerator.

[0068] Exemplarily, the refrigeration device can be a refrigerator, a freezer, an ice cream machine, a wine cooler, a freezer chest, a deep freezer, an ice cream maker, an ice maker, etc.

[0069] The thermal insulation material of the present application will be specifically described below through specific embodiments. The following embodiments are only partial embodiments of the present application and do not limit the present application.

[0070] Example 1

[0071] A thermal insulation material, by weight, the thermal insulation material includes 85 parts of the first composition and 15 parts of the second composition;

[0072] Among them, by weight, the first composition includes 100 parts of PVC resin, 55 parts of TOTM (plasticizer), 0.8 parts of trimethylolpropane trimethacrylate (crosslinking agent), 7.5 parts of calcium carbonate (heat stabilizer), 25 parts of calcium carbonate (inorganic filler), 0.3 parts of Fischer-Tropsch wax (lubricant), and 1 part of nano-zinc (antibacterial and mildew-proof agent);

[0073] By weight, the second composition includes 60 parts of SEEPS (styrene block copolymer), 32.5 parts of Expancel microspheres (foaming agent), 2.5 parts of zinc stearate, 3 parts of stearic acid, 21 parts of white oil, and 37.5 parts of polypropylene;

[0074] The preparation steps of the first composition include: mixing the weighed PVC resin with heat stabilizers and antibacterial and antifungal agents evenly under the stirring of a high-speed mixer; adding plasticizers while continuously stirring and heating up to 100 °C, stirring at a speed of 1800 r / min for 20 min; adding inorganic fillers and lubricants while continuously stirring and heating up to 120 °C; adding crosslinking agents for crosslinking reaction and continuously stirring for 20 min; cooling and lowering the temperature of the evenly mixed material to 72 °C and then adding it to a twin-screw extruder for pelletizing;

[0075] The preparation steps of the second composition include: fully mixing the styrene block copolymer, white oil, and PP evenly and standing for 8 h, then adding the foaming agent, zinc stearate, and stearic acid, heating up to 90 °C and stirring the material evenly, and then extruding and pelletizing through a twin-screw extruder;

[0076] The preparation steps of the thermal insulation material include: adding the first composition and the second composition to a twin-screw extruder in proportion, mixing and heating up to 150 °C for extrusion.

[0077] Example 2

[0078] A thermal insulation material, compared with Example 1, is different in that: by weight, the thermal insulation material includes 95 parts of the first composition and 5 parts of the second composition.

[0079] Example 3

[0080] A thermal insulation material, compared with Example 1, is different in that: by weight, the thermal insulation material includes 90 parts of the first composition and 10 parts of the second composition.

[0081] Example 4

[0082] A thermal insulation material, compared with Example 1, is different in that: by weight, the thermal insulation material includes 80 parts of the first composition and 20 parts of the second composition.

[0083] Example 5

[0084] A thermal insulation material, compared with Example 1, is different in that: in the second composition, the styrene block copolymer is SBS.

[0085] Example 6

[0086] A thermal insulation material, compared with Example 1, is different in that: in the second composition, the styrene block copolymer is SEBS.

[0087] Comparative Example 1

[0088] A thermal insulation material, compared with Example 1, the difference is that: this thermal insulation material consists only of the first composition; by weight, the first composition includes 100 parts of PVC resin, 55 parts of TOTM (plasticizer), 0.8 parts of trimethylolpropane trimethacrylate (crosslinking agent), 7.5 parts of calcium carbonate (heat stabilizer), 25 parts of calcium carbonate (inorganic filler), 0.3 parts of lubricant, and 1 part of nano-zinc (antibacterial and mildew-proof agent);

[0089] The preparation steps of the thermal insulation material include: mixing the weighed PVC resin with the heat stabilizer and antibacterial and mildew-proof agent evenly under the stirring of a high-speed mixer; adding the plasticizer and heating to 100 °C while continuously stirring, and stirring at a speed of 1800 r / min for 20 min; adding the inorganic filler and lubricant while continuously stirring and heating to 120 °C; adding the crosslinking agent for crosslinking reaction and continuously stirring for 20 min; cooling the uniformly mixed material to 72 °C and then extruding it with a twin-screw extruder.

[0090] Performance Test

[0091] The thermal insulation materials prepared in Examples 1-6 and Comparative Example 1 were tested, and the test methods are as follows:

[0092] 1. Thermal conductivity: Refer to the ISO 22007-2 standard and test it with a thermal constant analyzer.

[0093] 2. Tensile strength and elongation at break: Refer to the GB / T 528-2009 standard and test it with a universal material testing machine at room temperature.

[0094] The test results are shown in Table 1.

[0095] Table 1

[0096] Name Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Appearance Relatively smooth Very smooth Smooth Rough Relatively smooth Relatively smooth Very smooth Thermal conductivity (W / m*k) 0.224 0.245 0.233 0.212 0.227 0.225 0.256 Tensile strength (MPa) 13.4 12.9 13.1 13.7 13.3 13.1 12.6 Elongation at break (%) 409 368 382 422 408 406 347

[0097] It can be seen from Table 1 that the thermal conductivities of the thermal insulation materials in Examples 1-6 are all less than that of the thermal insulation material in Comparative Example 1. That is to say, when using the thermal insulation materials in Examples 1-6 to prepare door seals, the obtained door seals can more effectively reduce the heat transfer inside and outside the refrigerator, achieve a better thermal insulation effect, and thus reduce the energy consumption of the refrigerator;

[0098] The tensile strength and elongation at break of the thermal insulation materials in Examples 1-6 are both less than those of the thermal insulation material in Comparative Example 1. That is to say, the thermal insulation materials in Examples 1-6 have better mechanical strength and elasticity. When using the thermal insulation materials in Examples 1-6 to prepare door gaskets, the obtained door gaskets can achieve better sealing performance between the refrigerator cabinet and the door body, thereby effectively reducing the loss of cold in the refrigerator, achieving better thermal insulation effect, and further reducing the energy consumption of the refrigerator;

[0099] It is known that the difference in the thermal conductivity coefficient between the thermal insulation materials in Examples 1-6 and that in Comparative Example 1 is as follows: the thermal insulation materials in Examples 1-6 include 80-95 parts of a first composition (PVC masterbatch) and 5-20 parts of a second composition (styrene block copolymer microfoam masterbatch), while the thermal insulation material in Comparative Example 1 consists only of the first composition (PVC masterbatch). This shows that by mixing the first composition (PVC masterbatch) and the second composition (styrene block copolymer microfoam masterbatch), the obtained thermal insulation material has a lower thermal conductivity coefficient, as well as a greater tensile strength and elongation at break. When the thermal insulation material prepared in the examples of the present application is applied to door gaskets, it can more effectively improve the thermal insulation effect of the refrigerator and reduce the energy consumption of the refrigerator.

[0100] By comparing each example among Examples 1-4, it can be seen that the thermal insulation material prepared in Example 4 has the lowest thermal conductivity coefficient, as well as the greatest tensile strength and elongation at break. However, its appearance is relatively rough. That is to say, the outer surface of the door gasket prepared with this thermal insulation material will have a relatively high surface roughness. Therefore, when this door gasket is applied to a refrigerator, it is easy to generate small gaps between the door gasket and the refrigerator door body and / or the cabinet, resulting in the loss of cold in the refrigerator; the thermal insulation material prepared in Example 4 has a smooth surface, but a relatively large thermal conductivity coefficient, and relatively low tensile strength and elongation at break; while the thermal insulation material prepared in Example 1 has a relatively smooth surface, a relatively low thermal conductivity coefficient, and relatively high tensile strength and elongation at break; therefore, among Examples 1-4, the thermal insulation material prepared in Example 1 has better advantages when applied to refrigerator door gaskets;

[0101] It is known that the difference among Examples 1-4 lies in the different ratios of the first composition and the second composition. This shows that when the ratio of the first composition to the second composition is 85:15 (the ratio of Example 1), the obtained thermal insulation material has the best advantages in the application of door gaskets.

[0102] The above has introduced in detail the thermal insulation material, door seal and refrigeration equipment provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A thermal insulation material, characterized in that: In parts by weight, the thermal insulation material comprises 80-95 parts of the first composition and 5-20 parts of the second composition; Wherein, the first composition comprises, by weight, 90-110 parts of PVC resin, 45-65 parts of plasticizer, 0.1-1.5 parts of crosslinking agent, 5-10 parts of heat stabilizer, 20-30 parts of inorganic filler, 0.2-0.4 parts of lubricant, and 0.5-1.5 parts of antibacterial and mildew-proof agent; In parts by weight, the second composition comprises 55-65 parts of styrene block copolymer, 20-45 parts of foaming agent, 1-4 parts of zinc stearate, 2-4 parts of stearic acid, 17-25 parts of white oil and 15-20 parts of polypropylene.

2. The thermal insulation material according to claim 1, characterized in that: The styrene block copolymer comprises at least one of SEEPS, SBS and SEBS; and / or, The styrene content of the styrene block copolymer is 30wt%-40wt%; and / or, The weight average molecular weight of the styrene block copolymer is 60,000-100,000.

3. The thermal insulation material according to claim 1, characterized in that: The plasticizer includes at least one of dioctyl terephthalate, trioctyl trimellitate, citrate plasticizer, and epoxidized soybean oil; and / or, The crosslinking agent comprises trimethylolpropane trimethacrylate; and / or, The heat stabilizer includes at least one of a calcium zinc heat stabilizer and a rare earth heat stabilizer.

4. The thermal insulation material according to claim 1, characterized in that: The inorganic filler includes at least one of barium sulfate, calcium carbonate and hollow glass microspheres; and / or, The average particle size of the inorganic filler is 1 μm to 100 μm.

5. The thermal insulation material according to claim 4, characterized in that: The average particle size of the hollow glass microspheres is 5 μm to 100 μm; and / or, The wall thickness of the hollow glass microspheres is 1 μm to 10 μm; and / or, The material of the hollow glass microspheres includes at least one of silicon dioxide, aluminum oxide, zirconium oxide, magnesium oxide and sodium silicate.

6. The thermal insulation material according to claim 1, characterized in that: The lubricant comprises at least one of stearic acid, Fischer-Tropsch wax and oleic acid amide; and / or, The antibacterial and antifungal agent comprises at least one of nano zinc and zinc phosphate; and / or, The foaming agent includes a microsphere foaming agent.

7. The thermal insulation material according to claim 6, characterized in that: The microsphere foaming agent includes at least one of microsphere foaming agent F-230D, microsphere foaming agent F-260D and Expancel microspheres.

8. A door seal, characterized in that: The thermal insulation material comprises the thermal insulation material according to any one of claims 1 to 7.

9. A refrigeration device, characterized in that: Including the door seal as claimed in claim 8.

10. The refrigeration device according to claim 9, characterized in that: The refrigeration device comprises a box body and a door body, the box body has a refrigeration compartment, the door body can be installed on the box body to open and close the refrigeration compartment, the door body is provided with the door seal on one side facing the box body, and / or the box body is provided with the door seal on one side facing the door body.