Cold-resistant PVC conveyor belt cover material and light conveyor belt

Abstract

The application discloses a cold-resistant PVC conveying belt surface layer material and a light conveying belt and belongs to the technical field of PVC materials. The cold-resistant PVC conveying belt surface layer material comprises the following raw materials in parts by weight: 100 parts of PVC paste resin, 5-24 parts of a cold-resistant agent, 1.5-3 parts of an anti-aging agent, 12-23 parts of a fluorine-containing plasticizer, 3-8 parts of a fluorosilicon resin, 2-7 parts of a polyurethane elastomer, 2-6 parts of a flame retardant, 1-3 parts of nano calcium carbonate, 0.5-1.5 parts of an antioxidant, and 0.6-4 parts of a fluorosilicon surfactant. The cold-resistant PVC conveying belt surface layer material provided by the application can maintain excellent performance in a cold environment. The decanedicarboxylic acid dioctyl ester phase change material releases heat at low temperature, improving the cold resistance of the coating. In addition, the surface layer material is endowed with excellent anti-aging performance through the anti-freezing protection of glycerol, the antioxidant effect of cerium ions and the self-repairing performance of dopamine hydrochloride, so that the conveying belt can maintain stable performance in a low-temperature environment and effectively prolong the service life.

Description

Technical Field

[0001] This invention belongs to the field of PVC material technology, specifically relating to a cold-resistant PVC conveyor belt surface material and a lightweight conveyor belt. Background Technology

[0002] PVC conveyor belts are typically composed of a skeleton material woven from polyester fiber or cotton yarn and PVC material. They have good corrosion resistance, insulation and mechanical properties, and are widely used in logistics, packaging, printing, food, wood, aquaculture and other industries. They are especially suitable for assembly line operations that require long-term continuous operation.

[0003] Traditional PVC conveyor belts often suffer from performance deficiencies in low-temperature environments. When temperatures drop to between -30°C and 0°C, the PVC material hardens, becomes brittle, and may even crack, causing the conveyor belt to lose its elasticity and shortening its lifespan. These problems are particularly pronounced in cold regions or cold chain transportation scenarios, not only shortening the conveyor belt's lifespan but also increasing maintenance costs. Therefore, finding a cold-resistant conveyor belt surface material is essential. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a cold-resistant PVC conveyor belt surface material and a lightweight conveyor belt.

[0005] The first aspect of this invention is to provide a cold-resistant PVC conveyor belt surface material, which, by weight, comprises the following raw materials: 100 parts PVC paste resin, 5-24 parts cold-resistant agent, and 1.5-3 parts anti-aging agent;

[0006] The cold-resistant agent is prepared by the following steps:

[0007] S1: Dioctyl phthalate and dioctyl sebacate phase change materials are dispersed in a solvent to obtain a dispersion;

[0008] S2: Remove the solvent from the dispersion to obtain a cold-resistant agent.

[0009] It should be noted that dioctyl sebacate phase change material can release heat through phase change at sub-zero temperatures, thereby increasing the coating temperature and improving the coating's cold resistance. When dioctyl phthalate and dioctyl sebacate phase change material are mixed with a solvent to form a complex, dioctyl phthalate can partially cover the surface of the dioctyl sebacate phase change material, improving the compatibility of the dioctyl sebacate phase change material with PVC. This, in turn, facilitates the dioctyl sebacate phase change material's ability to release heat through phase change, enhancing the cold resistance of the surface layer material.

[0010] In some embodiments, the solvent is selected from at least one of toluene, xylene, cyclohexane, chloroform, dichloromethane, ethyl acetate, butyl acetate, acetone, methyl isobutyl ketone, ethanol, and n-butanol, and the amount of dioctyl phthalate used is 6-30% of the mass of the dioctyl sebacate phase change material.

[0011] In some embodiments, S2 specifically involves placing the dispersion in a vacuum environment of -0.098 to -0.095 MPa and rotary evaporating it at 30-35°C until constant weight, thereby obtaining the cold-resistant agent.

[0012] In some embodiments, the anti-aging agent is a lignin-rare earth complex, which is prepared by the following steps:

[0013] (1) Disperse alkali lignin in an ionic liquid to form a solution, then inject the solution into an organic solvent, centrifuge and collect the precipitate, freeze-dry the precipitate to obtain porous alkali lignin powder;

[0014] (2) Dissolve cerium ammonium nitrate in deionized water, add alkali lignin porous powder, and then subject the mixture to ultrasonic treatment, filtration, and drying to obtain Ce. 3+ @Lignin complex;

[0015] (3) Ce 3+ The lignin complex was immersed in an aqueous glycerol solution and then freeze-dried to obtain an antifreeze Ce. 3+ @Lignin complex;

[0016] (4) Apply antifreeze Ce 3+ The lignin complex was dispersed in a buffer solution, and dopamine hydrochloride was added to react with it. After centrifugation and drying, the lignin-rare earth complex was obtained.

[0017] It should be noted that this invention creatively provides a lignin-rare earth composite, which involves cleaving the hydrogen bonds of lignin with an ionic liquid, then injecting it into a pre-cooled organic solvent, where temperature difference induces phase separation to form a porous structure, and freeze-drying preserves the pores; Ce 3+ Glycerol is fixed on the porous structure of alkali lignin by chelating and bonding with the phenolic hydroxyl groups of lignin. Glycerol is loaded onto the porous alkali lignin powder through micropores, and finally dopamine hydrochloride is coated on the surface of the porous microspheres.

[0018] Ce 3+It provides active sites for free radical scavenging, efficiently quenching free radicals through variable valence reactions, resulting in superior antioxidant power compared to traditional antioxidants. Glycerin is stored in micropores to form a biological antifreeze layer, lowering the material's freezing point. When cracks appear, the catechol groups in dopamine hydrochloride are exposed to air and oxidized to active quinone groups, which then undergo Schiff base crosslinking reactions with adjacent amino groups, forming a dense repair network at the crack site, achieving a repair effect. These three components, by scavenging free radicals and lowering the material's freezing point, significantly improve the anti-aging effect of the surface material in cold environments through self-healing.

[0019] In some embodiments, the ionic liquid is selected from at least one of 1-butyl-3-methylimidazolium acetate solution and 1-ethyl-3-methylimidazolium acetate solution; the organic solvent is selected from at least one of ethanol, acetone, and tetrahydrofuran; and the buffer solution is tris(hydroxymethyl)aminomethane hydrochloride buffer.

[0020] In some embodiments, the amount of ionic liquid used is 8-9 times that of alkali lignin; the mass ratio of alkali lignin to cerium ammonium nitrate is 5-6:1; the concentration of the glycerol aqueous solution is 15-20 wt%; and the amount of dopamine hydrochloride used is equal to the amount of antifreeze Ce. 3+ @4-5% of the lignin complex mass.

[0021] In some embodiments, in step (1), the temperature of the organic solvent is -30 to -20°C and the freeze-drying temperature is -80 to -60°C; in step (2), the ultrasonic frequency is 40-60 kHz, the ultrasonic time is 30-40 min, and the drying temperature is 80-100°C; in step (3), the freeze-drying temperature is -40 to -30°C; and in step (4), the reaction temperature is 40-50°C and the reaction time is 2-3 h.

[0022] In some embodiments, the surface material of the cold-resistant PVC conveyor belt further includes, by weight, 12-23 parts of fluorinated plasticizer, 3-8 parts of fluorosilicone resin, 2-7 parts of polyurethane elastomer, 2-6 parts of flame retardant, 1-3 parts of nano-calcium carbonate, 0.5-1.5 parts of antioxidant, and 0.6-4 parts of fluorosilicone surfactant.

[0023] It should be noted that the addition of fluorinated plasticizers and fluorosilicone resins in this invention is to synergistically lower the glass transition temperature, thereby compensating for the insufficient flexibility of PVC molecules and improving cold resistance; the addition of polyurethane elastomers is to improve the coating's ductility and impact resistance, and avoid low-temperature brittleness; the addition of nano-calcium carbonate can prevent the enhancement of mechanical properties at low temperatures, thereby assisting in improving cold resistance. In addition, nano-calcium carbonate can also fill the tiny gaps in the coating, improve the coating's density, and reduce the penetration of water vapor and air at low temperatures, thereby improving cold resistance; the addition of fluorosilicone surfactants is to reduce the surface energy of the coating and reduce the adhesion of ice crystals to the coating.

[0024] In some embodiments, the fluorinated plasticizer is fluorinated oxalate; the flame retardant is selected from at least one of aluminum hydroxide, zinc borate, ammonium polyphosphate, and triphenyl phosphate; the antioxidant is selected from at least one of antioxidant 1010, antioxidant 1076, and antioxidant CA; and the fluorosilicone surfactant is selected from at least one of polyether-polydimethylsiloxane-polyfluoroalkyl ether, polyvinyl alcohol-silicon-fluorine triblock, perfluorooctyl ethanesulfonic acid-siloxane ester, and propyltrimethoxysilane dodecylfluoroheptanoate.

[0025] A second aspect of the present invention is to provide a lightweight conveyor belt, comprising a cold-resistant PVC conveyor belt surface material.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. This invention provides a cold-resistant PVC surface material containing dioctyl phthalate and dioctyl sebacate phase change materials. By utilizing the surface covering effect of dioctyl phthalate on dioctyl sebacate phase change material, the compatibility between dioctyl sebacate phase change material and PVC is improved, enabling dioctyl sebacate phase change material to release heat through phase change at low temperatures, thereby improving the cold resistance of the surface layer and enhancing the performance of the surface material in severe cold environments.

[0028] 2. The cold-resistant PVC surface material of this invention, after being combined with a lignin-rare earth composite, utilizes ionic liquids and organic solvents to create a porous structure, thus endowing the material with excellent cold resistance. Among them, Ce... 3+ It provides strong free radical scavenging capabilities, offering beneficial antioxidant properties to the surface layer material; glycerol constructs an antifreeze layer mechanism, effectively lowering the material's freezing point; dopamine hydrochloride endows the material with self-healing capabilities, and its catechol groups can be oxidized and cross-linked when cracks appear, forming a repair network. These properties work synergistically to give the surface layer material superior anti-aging performance in cold environments.

[0029] 3. The lightweight conveyor belt containing cold-resistant PVC surface material provided by the present invention has excellent cold resistance and anti-aging properties, can maintain stable performance in low-temperature environments, effectively extend service life and reduce maintenance costs. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the embodiments.

[0031] Example 1

[0032] A cold-resistant PVC conveyor belt surface material, by weight, comprises the following raw materials: 100 parts PVC paste resin, 15 parts cold-resistant agent, 2 parts anti-aging agent, 18 parts fluorinated oxalate, 5 parts fluorosilicone resin, 5 parts polyurethane elastomer, 4 parts aluminum hydroxide, 2 parts nano calcium carbonate, 1 part antioxidant 1010, and 2.6 parts polyether-polydimethylsiloxane-polyfluoroalkyl ether.

[0033] The cold-resistant agent is prepared by the following steps:

[0034] S1: Dioctyl phthalate and dioctyl sebacate phase change materials are dispersed in ethanol to obtain a dispersion; wherein the amount of dioctyl phthalate is 18% of the mass of the dioctyl sebacate phase change material.

[0035] S2: Place the dispersion in a vacuum environment of -0.098 MPa and rotary evaporate it at 35°C until constant weight to obtain the cold-resistant agent.

[0036] The anti-aging agent is a lignin-rare earth complex, which is prepared by the following steps:

[0037] (1) Disperse alkali lignin in a 1-butyl-3-methylimidazolium acetate solution to form a solution, then inject the solution into ethanol at -25°C, centrifuge and collect the precipitate, freeze-dry the precipitate at -70°C to constant weight to obtain porous alkali lignin powder; wherein, the amount of ionic liquid is 8 times the amount of alkali lignin; the mass ratio of alkali lignin to cerium ammonium nitrate is 5:1.

[0038] (2) Dissolve cerium ammonium nitrate in deionized water, add alkali lignin porous powder, sonicate at 50 kHz for 35 min, filter, and dry at 90 °C to constant weight to obtain Ce. 3+ @Lignin complex.

[0039] (3) Ce 3+ The lignin complex was immersed in a 20 wt% glycerol aqueous solution and freeze-dried at -35°C to constant weight to obtain antifreeze Ce. 3+ @Lignin complex.

[0040] (4) Apply antifreeze Ce 3+ The lignin complex was dispersed in tris(hydroxymethyl)aminomethane hydrochloride buffer, and dopamine hydrochloride was added. The mixture was reacted at 45°C for 3 h, and then centrifuged and dried to obtain the lignin-rare earth complex. The amount of dopamine hydrochloride used was [amount not specified in the original text]. 3+ @5% of the mass of the lignin complex.

[0041] A lightweight conveyor belt comprising the above-mentioned cold-resistant PVC conveyor belt surface material is prepared by the following steps:

[0042] Step 1: Mix PVC paste resin and fluorinated plasticizer, stir at 300 rpm for 10 min until a paste without particles is formed, then add fluorosilicone surfactant, anti-aging agent, and antioxidant, stir at 800 rpm until the filler is free of agglomeration, and finally add nano calcium carbonate, flame retardant, cold resistant agent, polyurethane elastomer, and fluorosilicone resin, stir at 1200 rpm for 30 min, and obtain the cold-resistant PVC conveyor belt surface material after vacuum defoaming;

[0043] Step 2: Heat set the polyester fabric used to prepare the lightweight conveyor belt;

[0044] Step 3: The cold-resistant PVC conveyor belt surface material obtained in Step 1 is coated onto the surface of the shaped polyester fabric using a scraping coating process. After being plasticized in an infrared heating box, a lightweight conveyor belt is obtained.

[0045] Example 2

[0046] It is basically the same as Example 1, except that:

[0047] The cold-resistant PVC conveyor belt surface material in Example 2 comprises the following raw materials by weight: 100 parts PVC paste resin, 24 parts cold-resistant agent, 3 parts anti-aging agent, 23 parts fluorinated oxalate, 8 parts fluorosilicone resin, 7 parts polyurethane elastomer, 6 parts zinc borate, 3 parts nano calcium carbonate, 1.5 parts antioxidant 1076, and 4 parts polyvinyl alcohol-silicone-fluorine triblock.

[0048] Example 3

[0049] It is basically the same as Example 1, except that:

[0050] The cold-resistant PVC conveyor belt surface material in Example 3 comprises the following raw materials by weight: 100 parts PVC paste resin, 5 parts cold-resistant agent, 1.5 parts anti-aging agent, 12 parts fluorinated oxalate, 3 parts fluorosilicone resin, 2 parts polyurethane elastomer, 2 parts ammonium polyphosphate, 1 part nano calcium carbonate, 0.5 parts antioxidant CA, and 0.6 parts perfluorooctyl ethanesulfonate-siloxane ester.

[0051] Example 4

[0052] It is basically the same as Example 1, except that:

[0053] In this Example 4, the cold-resistant agent is prepared by the following steps:

[0054] S1: Dioctyl phthalate and dioctyl sebacate phase change materials are dispersed in acetone to obtain a dispersion; wherein the amount of dioctyl phthalate is 30% of the mass of the dioctyl sebacate phase change material.

[0055] S2: Place the dispersion in a vacuum environment of -0.098 MPa and rotary evaporate it at 35°C until constant weight to obtain the cold-resistant agent.

[0056] The anti-aging agent is a lignin-rare earth complex, which is prepared by the following steps:

[0057] (1) Disperse alkali lignin in 1-ethyl-3-methylimidazolium acetate solution to form a solution, then inject the solution into acetone at -30°C, centrifuge and collect the precipitate, freeze-dry the precipitate at -60°C to constant weight to obtain porous alkali lignin powder; wherein, the amount of ionic liquid is 9 times the amount of alkali lignin; the mass ratio of alkali lignin to cerium ammonium nitrate is 6:1.

[0058] (2) Dissolve cerium ammonium nitrate in deionized water, add alkali lignin porous powder, sonicate at 60 kHz for 40 min, filter, and dry at 100℃ to constant weight to obtain Ce. 3+ @Lignin complex.

[0059] (3) Ce 3+ The lignin complex was immersed in a 20 wt% glycerol aqueous solution and freeze-dried at -40°C to constant weight to obtain antifreeze Ce. 3+ @Lignin complex.

[0060] (4) Apply antifreeze Ce 3+ The lignin complex was dispersed in tris(hydroxymethyl)aminomethane hydrochloride buffer, and dopamine hydrochloride was added. The mixture was reacted at 40°C for 3 h, and then centrifuged and dried to obtain the lignin-rare earth complex. The amount of dopamine hydrochloride used was [amount not specified in the original text]. 3+ @5% of the mass of the lignin complex.

[0061] Example 5

[0062] It is basically the same as Example 1, except that:

[0063] In this Example 5, the cold-resistant agent is prepared by the following steps:

[0064] S1: Dioctyl phthalate and dioctyl sebacate phase change materials are dispersed in toluene solvent to obtain a dispersion; wherein the amount of dioctyl phthalate is 6-30% of the mass of the dioctyl sebacate phase change material.

[0065] S2: Place the dispersion in a vacuum environment of 0.095 MPa and rotary evaporate it at 30°C until constant weight to obtain the cold-resistant agent.

[0066] The anti-aging agent is a lignin-rare earth complex, which is prepared by the following steps:

[0067] (1) Disperse alkali lignin in a 1-butyl-3-methylimidazolium acetate solution to form a solution, then inject the solution into tetrahydrofuran at -30°C, collect the precipitate after centrifugation, freeze-dry the precipitate at -80°C to constant weight to obtain porous alkali lignin powder; wherein, the amount of ionic liquid is 8 times the amount of alkali lignin; the mass ratio of alkali lignin to cerium ammonium nitrate is 5:1.

[0068] (2) Dissolve cerium ammonium nitrate in deionized water, add alkali lignin porous powder, sonicate at 60 kHz for 30 min, filter, and dry at 80 °C to constant weight to obtain Ce. 3+ @Lignin complex.

[0069] (3) Ce 3+ The lignin complex was immersed in a 15wt% glycerol aqueous solution and freeze-dried at -30°C to constant weight to obtain antifreeze Ce. 3+ @Lignin complex.

[0070] (4) Apply antifreeze Ce 3+ The lignin complex was dispersed in tris(hydroxymethyl)aminomethane hydrochloride buffer, and dopamine hydrochloride was added. The mixture was reacted at 40°C for 3 h, and then centrifuged and dried to obtain the lignin-rare earth complex. The amount of dopamine hydrochloride used was [amount not specified in the original text]. 3+ @4% of the mass of the lignin complex.

[0071] Comparative Example 1

[0072] It is basically the same as Example 1, except that: dioctyl phthalate is not added, and the original amount of dioctyl phthalate is added to the dioctyl sebacate phase change material.

[0073] Comparative Example 2

[0074] It is basically the same as Example 1, except that no cold-resistant agent is added.

[0075] Comparative Example 3

[0076] It is basically the same as Example 1, except that no anti-aging agent is added.

[0077] To demonstrate that the cold-resistant PVC conveyor belt surface material provided by this invention can improve the performance of lightweight conveyor belts in cold environments, the performance of the lightweight conveyor belts prepared in Examples 1-5 and Comparative Examples 1-3 was tested below. The test results are shown in Table 1.

[0078] Low-temperature embrittlement resistance test: The lightweight conveyor belts prepared in the examples and comparative examples were cut into 38 mm long test pieces. Each test piece was immersed in a liquid medium at a controlled test temperature for 5 ± 2 minutes. The temperature of the test pieces was measured, and the test pieces were subjected to impact. The lowest temperature of each test piece that did not break was defined as the low-temperature embrittlement temperature of the test piece. Test pieces with a low-temperature embrittlement temperature of -5 to -20°C were considered acceptable, and test pieces with a low-temperature embrittlement temperature below -20°C were considered excellent.

[0079] Low-temperature anti-aging performance test: The test was conducted according to GB / T 3512-2014, with an aging temperature of -20℃ and an aging time of 7 days. The change rate of tensile strength was used as the measure.

[0080] Tensile strength test: The test shall be conducted in accordance with GB / T528-2009.

[0081] Resilience test: The test shall be conducted in accordance with GB / T1681-2009.

[0082] Table 1

[0083]

[0084] As can be seen from Table 1, the lightweight conveyor belt provided by the embodiments of the present invention has excellent resistance to low-temperature embrittlement, low-temperature aging resistance, and good mechanical properties. In comparison with the comparative examples, Comparative Example 1, due to the absence of dioctyl phthalate, reduced the compatibility between the dioctyl sebacate phase change material and PVC, causing the dioctyl sebacate phase change material to fail to exert its phase change exothermic effect, thus reducing the performance of the conveyor belt at low temperatures; Comparative Example 2, lacking the addition of a cold-resistant agent, resulted in a significant decrease in the cold resistance of the conveyor belt; Comparative Example 3, lacking the addition of an anti-aging agent, resulted in a faster aging rate at low temperatures and a significant reduction in anti-aging properties.

[0085] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A cold-resistant PVC conveyor belt surface material, characterized in that, By weight, it includes the following raw materials: 100 parts PVC paste resin, 5-24 parts cold-resistant agent, and 1.5-3 parts anti-aging agent; The cold-resistant agent is prepared by the following steps: S1: Dioctyl phthalate and dioctyl sebacate phase change materials are dispersed in a solvent to obtain a dispersion; wherein the amount of dioctyl phthalate is 6-30% of the mass of the dioctyl sebacate phase change material; S2: Remove the solvent from the dispersion to obtain a cold-resistant agent; The anti-aging agent is a lignin-rare earth complex, which is prepared by the following steps: (1) Disperse alkali lignin in an ionic liquid to form a solution, then inject the solution into an organic solvent, centrifuge and collect the precipitate, freeze-dry the precipitate to obtain porous alkali lignin powder; (2) Dissolve cerium ammonium nitrate in deionized water, add the alkali lignin porous powder, and then subject it to ultrasonic treatment, filtration, and drying to obtain Ce. 3+ @Lignin complex; (3) The Ce 3+ The lignin complex was immersed in an aqueous glycerol solution and then freeze-dried to obtain an antifreeze Ce. 3+ @Lignin complex; (4) The antifreeze Ce 3+ The lignin complex was dispersed in a buffer solution, and dopamine hydrochloride was added to react with it. After centrifugation and drying, the lignin-rare earth complex was obtained. The buffer solution was tris(hydroxymethyl)aminomethane hydrochloride buffer solution.

2. The cold-resistant PVC conveyor belt surface material according to claim 1, characterized in that, The solvent is selected from at least one of toluene, xylene, cyclohexane, chloroform, dichloromethane, ethyl acetate, butyl acetate, acetone, methyl isobutyl ketone, ethanol, and n-butanol.

3. The cold-resistant PVC conveyor belt surface material according to claim 1, characterized in that, S2 specifically involves placing the dispersion in a vacuum environment of -0.098 to -0.095 MPa and rotary evaporating it at 30-35°C until constant weight, thereby obtaining the cold-resistant agent.

4. The cold-resistant PVC conveyor belt surface material according to claim 1, characterized in that, The ionic liquid is selected from at least one of 1-butyl-3-methylimidazolium acetate solution and 1-ethyl-3-methylimidazolium acetate solution; the organic solvent is selected from at least one of ethanol, acetone, and tetrahydrofuran.

5. The cold-resistant PVC conveyor belt surface material according to claim 1, characterized in that, The amount of the ionic liquid used is 8-9 times the amount of the alkali lignin used; the mass ratio of the alkali lignin to the cerium ammonium nitrate is 5-6:1; the concentration of the glycerol aqueous solution is 15-20 wt%; the amount of dopamine hydrochloride used is the same as the amount of antifreeze Ce. 3+ @4-5% of the lignin complex mass.

6. The cold-resistant PVC conveyor belt surface material according to claim 1, characterized in that, In step (1), the temperature of the organic solvent is -30 to -20℃, and the freeze-drying temperature is -80 to -60℃; in step (2), the ultrasonic frequency is 40-60kHz, the ultrasonic time is 30-40 min, and the drying temperature is 80-100℃; in step (3), the freeze-drying temperature is -40 to -30℃; in step (4), the reaction temperature is 40-50℃, and the reaction time is 2-3 h.

7. The cold-resistant PVC conveyor belt surface material according to any one of claims 1-6, characterized in that, By weight, the cold-resistant PVC conveyor belt surface material also includes 12-23 parts of fluorinated plasticizer, 3-8 parts of fluorosilicone resin, 2-7 parts of polyurethane elastomer, 2-6 parts of flame retardant, 1-3 parts of nano calcium carbonate, 0.5-1.5 parts of antioxidant, and 0.6-4 parts of fluorosilicone surfactant.

8. The cold-resistant PVC conveyor belt surface material according to claim 7, characterized in that, The fluorinated plasticizer is fluorinated oxalate; the flame retardant is selected from at least one of aluminum hydroxide, zinc borate, ammonium polyphosphate, and triphenyl phosphate; the antioxidant is selected from at least one of antioxidant 1010, antioxidant 1076, and antioxidant CA; the fluorosilicone surfactant is selected from at least one of polyether-polydimethylsiloxane-polyfluoroalkyl ether, polyvinyl alcohol-silicon-fluorine triblock, perfluorooctyl ethanesulfonate-siloxane ester, and propyltrimethoxysilane dodecylfluoroheptanoate.

9. A lightweight conveyor belt, characterized in that, Includes the cold-resistant PVC conveyor belt surface material as described in claim 8.

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