Cold-resistant PVC conveying belt surface layer material and light conveying belt

Abstract

The invention 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 is prepared from the following raw materials in parts by weight: 100 parts of PVC paste resin, 5 to 24 parts of cold-resistant agent, 1.5 to 3 parts of anti-aging agent, 12 to 23 parts of fluorine-containing plasticizer, 3 to 8 parts of fluorosilicone resin, 2 to 7 parts of polyurethane elastomer, 2 to 6 parts of flame retardant, 1 to 3 parts of nano calcium carbonate, 0.5 to 1.5 parts of antioxidant and 0.6 to 4 parts of fluorosilicone surfactant. The cold-resistant PVC conveyor belt surface layer material provided by the invention can keep excellent performance in a cold environment, the dioctyl sebacate phase-change material performs phase-change heat release at low temperature, the cold resistance of a coating is improved, and in addition, the cold-resistant PVC conveyor belt surface layer material has good cold resistance through the anti-freezing protection of glycerol, the anti-oxidation effect of cerium ions and the self-repairing performance of dopamine hydrochloride. The surface layer material is endowed with excellent anti-aging performance, so that the conveyer belt can keep stable performance in a low-temperature environment, and the service life is effectively prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of PVC materials, and particularly relates to a cold-resistant PVC conveyor belt surface material and a light conveyor belt. Background Art

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

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

[0004] Based on the deficiencies in the prior art, the object of the present invention is to provide a cold-resistant PVC conveyor belt surface material and a light conveyor belt.

[0005] The first aspect of the present invention is to provide a cold-resistant PVC conveyor belt surface material, which comprises the following raw materials in parts by weight: 100 parts of PVC paste resin, 5-24 parts of cold-resistant agent, and 1.5-3 parts of anti-aging agent; Wherein, the cold-resistant agent is prepared by the following steps: S1: dispersing dioctyl phthalate and dioctyl sebacate phase change materials in a solvent to obtain a dispersion; S2: removing the solvent in the dispersion to obtain a cold-resistant agent.

[0006] It should be noted that the dioctyl sebacate phase change material can release heat through phase change at sub-zero temperatures, raising the coating temperature and thus improving the coating's cold resistance. Dioctyl phthalate and the dioctyl sebacate phase change material are mixed with a solvent to form a composite. The 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 helps the dioctyl sebacate phase change material exert its phase change heat release function and improve the cold resistance of the surface material.

[0007] 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 is 6-30% of the mass of the dioctyl sebacate phase change material.

[0008] In some embodiments, S2 is specifically placing the dispersion in a vacuum environment of -0.098 to -0.095 MPa, and rotary evaporating at 30-35° C. to a constant weight to obtain the cold-resistant agent.

[0009] In some embodiments, the anti-aging agent is a lignin-rare earth complex, and the lignin-rare earth complex is prepared by the following steps: (1) Alkali lignin is dispersed in an ionic liquid to form a solution, and then the solution is injected into an organic solvent. The precipitate is collected after centrifugation, and the precipitate is freeze-dried to obtain an alkali lignin porous powder; (2) Dissolve ammonium cerium nitrate in deionized water, add alkali lignin porous powder, and then perform ultrasonic treatment, filtration, and drying to obtain Ce 3+ @lignin complex; (3) Ce 3+ The lignin complex was immersed in a glycerol aqueous solution and freeze-dried to obtain antifreeze Ce. 3+ @lignin complex; (4) Antifreeze Ce 3+ The lignin complex was dispersed in a buffer solution, dopamine hydrochloride was added for reaction, and the lignin-rare earth complex was obtained after centrifugal drying.

[0010] It should be noted that the present invention creatively provides a lignin-rare earth composite, which cuts the hydrogen bonds of lignin by ionic liquid, then injects it into a pre-cooled organic solvent, induces phase separation by temperature difference, forms a porous structure, and freeze-dries to retain 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 on the porous alkali lignin powder through the micropores, and finally dopamine hydrochloride is covered on the surface of the porous microspheres.

[0011] Ce 3+ It provides free radical scavenging active sites, efficiently quenching free radicals through a valence-shifting reaction, and exhibits superior antioxidant properties compared to traditional antioxidants. Glycerol is stored in micropores to form a biological antifreeze layer, lowering the freezing point of the material. When cracks appear, the catechol groups in dopamine hydrochloride are exposed to air and oxidized to active quinone groups, which then undergo Schiff base cross-linking reactions with adjacent amino groups, forming a dense repair network at the cracks and achieving the desired repair effect. By scavenging free radicals and lowering the freezing point, the self-healing properties of the surface material significantly enhance its anti-aging properties in cold environments.

[0012] 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 is tris(hydroxymethyl)aminomethane hydrochloride buffer.

[0013] In some embodiments, the amount of ionic liquid is 8-9 times the amount of alkali lignin; the mass ratio of alkali lignin to ammonium cerium nitrate is 5-6:1; the concentration of glycerol aqueous solution is 15-20 wt%; the amount of dopamine hydrochloride is 100% of the antifreeze Ce 3+ @4-5% of the mass of the lignin complex.

[0014] 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; in step (4), the reaction temperature is 40-50°C, and the reaction time is 2-3 h.

[0015] In some embodiments, the cold-resistant PVC conveyor belt surface material further comprises, by weight, 12-23 parts of fluorine-containing 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.

[0016] It should be noted that the addition of fluorine-containing plasticizers and fluorosilicone resins in the present invention is to work synergistically to lower the glass transition temperature, so as to compensate for the insufficient flexibility of PVC molecules and thereby improve the cold resistance; the addition of polyurethane elastomer is to improve the ductility and impact resistance of the coating and avoid low-temperature brittleness; the addition of nano-calcium carbonate can avoid enhancing the mechanical properties at low temperatures, thereby assisting in improving the cold resistance. In addition, nano-calcium carbonate can also fill the tiny gaps in the coating, improve the density of the coating, and reduce the penetration of water vapor and air at low temperatures, thereby improving the cold resistance; the addition of fluorosilicone surfactant is to reduce the surface energy of the coating and reduce the adhesion of ice crystals to the coating.

[0017] In some embodiments, the fluorine-containing plasticizer is a 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, perfluorooctylethanesulfonic acid-siloxane ester, and dodecafluoroheptanoic acid propyltrimethoxysilane.

[0018] A second aspect of the present invention is to provide a lightweight conveyor belt comprising a cold-resistant PVC conveyor belt surface material.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a cold-resistant PVC surface layer material containing dioctyl phthalate and dioctyl sebacate phase change materials. By virtue of the surface covering effect of dioctyl phthalate on the dioctyl sebacate phase change material, the compatibility of the dioctyl sebacate phase change material and PVC is improved, so that the dioctyl sebacate phase change material can release heat through phase change at low temperatures, thereby improving the cold resistance of the surface layer and enhancing the performance of the surface layer material in severe cold environments.

[0020] 2. The cold-resistant PVC surface material of the present invention is combined with lignin-rare earth complex, and ionic liquid and organic solvent are used to create a porous structure, which gives the material excellent cold resistance. 3+ It provides powerful free radical scavenging capabilities, lending beneficial antioxidant properties to the surface material. Glycerol creates an antifreeze layer, effectively lowering the freezing point. Dopamine hydrochloride imparts self-healing capabilities to the material, its catechol groups oxidizing and cross-linking when cracks appear, forming a repair network. These properties work synergistically to give the surface material superior anti-aging properties in cold environments.

[0021] 3. The lightweight conveyor belt provided by the present invention contains a cold-resistant PVC surface material, which has excellent cold resistance and anti-aging properties, can maintain stable performance in a low-temperature environment, effectively extend the service life and reduce maintenance costs. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the embodiments.

[0023] Example 1 A cold-resistant PVC conveyor belt surface material comprises the following raw materials, calculated by weight: 100 parts of PVC paste resin, 15 parts of cold-resistant agent, 2 parts of anti-aging agent, 18 parts of fluorinated oxalate, 5 parts of fluorosilicone resin, 5 parts of polyurethane elastomer, 4 parts of aluminum hydroxide, 2 parts of nano-calcium carbonate, 1 part of antioxidant 1010, and 2.6 parts of polyether-polydimethylsiloxane-polyfluoroalkyl ether.

[0024] Wherein, the cold-resistant agent is prepared by the following steps: S1: Dispersing dioctyl phthalate and dioctyl sebacate phase change materials in ethanol to obtain a dispersion; wherein the amount of dioctyl phthalate is 18% of the mass of the dioctyl sebacate phase change material.

[0025] S2: Place the dispersion in a vacuum environment of -0.098 MPa and rotary evaporate at 35°C to a constant weight to obtain the cold-resistant agent.

[0026] The anti-aging agent is a lignin-rare earth complex, which is prepared by the following steps: (1) Alkali lignin is dispersed in 1-butyl-3-methylimidazolium acetate solution to form a solution, and then the solution is injected into ethanol at -25°C. The precipitate is collected after centrifugation, and the precipitate is freeze-dried at -70°C to a constant weight to obtain an alkali lignin porous powder; wherein the amount of ionic liquid used is 8 times the amount of the alkali lignin used; and the mass ratio of the alkali lignin to the cerium ammonium nitrate is 5:1.

[0027] (2) Dissolve ammonium cerium nitrate in deionized water, add alkali lignin porous powder, ultrasonically treat at 50 kHz for 35 minutes, filter and dry at 90 ° C to constant weight to obtain Ce 3+ @Lignin complex.

[0028] (3) Ce 3+ The lignin composite was immersed in a 20 wt% glycerol aqueous solution and freeze-dried at -35 °C to a constant weight to obtain antifreeze Ce 3+ @Lignin complex.

[0029] (4) Antifreeze Ce 3+ The lignin complex was dispersed in tris(hydroxymethyl)aminomethane hydrochloride) buffer solution, dopamine hydrochloride was added and reacted at 45°C for 3 h, and then centrifuged and dried to obtain a lignin-rare earth complex; wherein, the amount of dopamine hydrochloride was the amount of the antifreeze Ce 3+ @5% of the mass of the lignin complex.

[0030] A lightweight conveyor belt comprising the above-mentioned cold-resistant PVC conveyor belt surface material is prepared by the following steps: Step 1: Mix PVC paste resin and fluorine-containing plasticizer, stir at 300 rpm for 10 minutes until the paste is free of particles, then add fluorosilicone surfactant, anti-aging agent, and antioxidant, stir at 800 rpm until the filler is free of agglomeration, finally add nano-calcium carbonate, flame retardant, cold-resistant agent, polyurethane elastomer, and fluorosilicone resin, stir at 1200 rpm for 30 minutes, and vacuum defoam to obtain the cold-resistant PVC conveyor belt surface material; Step 2: Heat setting the polyester fabric used to prepare the light conveyor belt; Step 3: Use the scraping process to apply the cold-resistant PVC conveyor belt surface material obtained in the first step to the surface of the shaped polyester fabric, and then plasticize it in an infrared heating box to obtain a light conveyor belt.

[0031] Example 2 It is basically the same as Example 1, except that: The cold-resistant PVC conveyor belt surface material in this embodiment 2 includes the following raw materials, by weight: 100 parts of PVC paste resin, 24 parts of cold-resistant agent, 3 parts of anti-aging agent, 23 parts of fluorinated oxalate, 8 parts of fluorosilicone resin, 7 parts of polyurethane elastomer, 6 parts of zinc borate, 3 parts of nano-calcium carbonate, 1.5 parts of antioxidant 1076, and 4 parts of polyvinyl alcohol-silicon-fluorine triblock.

[0032] Example 3 It is basically the same as Example 1, except that: The cold-resistant PVC conveyor belt surface material in this embodiment 3 includes the following raw materials, by weight: 100 parts of PVC paste resin, 5 parts of cold-resistant agent, 1.5 parts of anti-aging agent, 12 parts of fluorinated oxalate, 3 parts of fluorosilicone resin, 2 parts of polyurethane elastomer, 2 parts of ammonium polyphosphate, 1 part of nano-calcium carbonate, 0.5 parts of antioxidant CA, and 0.6 parts of perfluorooctyl ethanesulfonic acid-siloxane ester.

[0033] Example 4 It is basically the same as Example 1, except that: In this embodiment 4, the cold-resistant agent is prepared by the following steps: S1: Dispersing dioctyl phthalate and dioctyl sebacate phase change materials in acetone to obtain a dispersion; wherein the amount of dioctyl phthalate is 30% of the mass of the dioctyl sebacate phase change material.

[0034] S2: Place the dispersion in a vacuum environment of -0.098 MPa and rotary evaporate at 35°C to a constant weight to obtain the cold-resistant agent.

[0035] The anti-aging agent is a lignin-rare earth complex, which is prepared by the following steps: (1) Alkali lignin is dispersed in 1-ethyl-3-methylimidazolium acetate solution to form a solution, and then the solution is injected into acetone at -30°C. The precipitate is collected after centrifugation, and the precipitate is freeze-dried at -60°C to a constant weight to obtain an alkali lignin porous powder; wherein the amount of ionic liquid used is 9 times the amount of the alkali lignin used; and the mass ratio of the alkali lignin to the cerium ammonium nitrate is 6:1.

[0036] (2) Dissolve ammonium cerium nitrate in deionized water, add alkali lignin porous powder, ultrasonically treat at 60 kHz for 40 minutes, filter and dry at 100 ° C to constant weight to obtain Ce 3+ @Lignin complex.

[0037] (3) Ce 3+ The lignin composite was immersed in a 20 wt% glycerol aqueous solution and freeze-dried at -40 °C to a constant weight to obtain antifreeze Ce 3+ @Lignin complex.

[0038] (4) Antifreeze Ce 3+ The lignin complex was dispersed in tris(hydroxymethyl)aminomethane hydrochloride) buffer, dopamine hydrochloride was added and reacted at 40°C for 3 h, and then centrifuged and dried to obtain a lignin-rare earth complex; wherein the amount of dopamine hydrochloride was the amount of the antifreeze Ce 3+ @5% of the mass of the lignin complex.

[0039] Example 5 It is basically the same as Example 1, except that: In this embodiment 5, the cold-resistant agent is prepared by the following steps: S1: Dispersing dioctyl phthalate and dioctyl sebacate phase change materials in a solvent of toluene to obtain a dispersion; wherein the amount of dioctyl phthalate is 6-30% of the mass of the dioctyl sebacate phase change material.

[0040] S2: Place the dispersion in a vacuum environment of 0.095 MPa and rotary evaporate at 30°C to a constant weight to obtain the cold-resistant agent.

[0041] The anti-aging agent is a lignin-rare earth complex, which is prepared by the following steps: (1) Alkali lignin is dispersed in 1-butyl-3-methylimidazolium acetate solution to form a solution, and then the solution is injected into tetrahydrofuran at -30°C. The precipitate is collected after centrifugation, and the precipitate is freeze-dried at -80°C to a constant weight to obtain an alkali lignin porous powder; wherein the amount of ionic liquid used is 8 times the amount of the alkali lignin used; and the mass ratio of the alkali lignin to the ammonium cerium nitrate is 5:1.

[0042] (2) Dissolve ammonium cerium nitrate in deionized water, add alkali lignin porous powder, ultrasonically treat at 60 kHz for 30 minutes, filter and dry at 80 ° C to constant weight to obtain Ce 3+ @Lignin complex.

[0043] (3) Ce 3+ The lignin complex was immersed in a 15 wt% glycerol aqueous solution and freeze-dried at -30 °C to a constant weight to obtain antifreeze Ce 3+ @Lignin complex.

[0044] (4) Antifreeze Ce 3+ The lignin complex was dispersed in tris(hydroxymethyl)aminomethane hydrochloride) buffer, dopamine hydrochloride was added and reacted at 40°C for 3 h, and then centrifuged and dried to obtain a lignin-rare earth complex; wherein the amount of dopamine hydrochloride was the amount of the antifreeze Ce 3+ @4% of the mass of the lignin complex.

[0045] Comparative Example 1 The method is basically the same as Example 1, except that: no dioctyl phthalate is added, and the amount of original dioctyl phthalate is superimposed on the dioctyl sebacate phase change material.

[0046] Comparative Example 2 The same as Example 1, except that no cold-resistant agent is added.

[0047] Comparative Example 3 The process is basically the same as Example 1, except that no anti-aging agent is added.

[0048] To demonstrate that the cold-resistant PVC conveyor belt surface material provided by the present invention can improve the performance of lightweight conveyor belts in cold environments, the lightweight conveyor belts prepared in Examples 1-5 and Comparative Examples 1-3 were subjected to performance tests. The test results are shown in Table 1.

[0049] Test for resistance to low-temperature embrittlement: Cut the lightweight conveyor belts obtained in the examples and comparative examples into 38 mm long test pieces. Immerse each test piece in a liquid medium at a controlled test temperature for 5±2 minutes. Measure the temperature of the test piece and strike the test piece. The lowest temperature of each test piece at which the test piece is not broken is defined as the low-temperature brittle temperature of the test piece. Test pieces with a low-temperature brittle temperature of -5 to -20°C are considered qualified, and test pieces with a low-temperature brittle temperature below -20°C are considered excellent.

[0050] Test low temperature anti-aging performance: According to GB / T 3512-2014, the aging temperature is -20℃ and the aging time is 7 days. The rate of change of tensile strength is used as the test. Test tensile strength: Test in accordance with GB / T528-2009.

[0051] Test resilience: Test in accordance with GB / T1681-2009.

[0052] Table 1 As can be seen from Table 1, the lightweight conveyor belt provided by the embodiment of the present invention has excellent resistance to low-temperature embrittlement, low-temperature aging resistance, and good mechanical properties. In conjunction with the comparative examples, comparative example 1 does not add dioctyl phthalate, which reduces the compatibility of the dioctyl sebacate phase change material with PVC, resulting in the dioctyl sebacate phase change material being unable to exert phase change heat release, thereby reducing the performance of the conveyor belt at low temperatures; comparative example 2 does not add a cold-resistant agent, resulting in a significant decrease in the cold resistance of the conveyor belt; comparative example 3 does not add an anti-aging agent, resulting in a faster aging rate at low temperatures and a significant decrease in aging resistance.

[0053] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A cold-resistant PVC conveyor belt surface material, characterized in that: The raw materials include the following by weight: 100 parts of PVC paste resin, 5-24 parts of cold-resistant agent, and 1.5-3 parts of anti-aging agent; Wherein, the cold-resistant agent is prepared by the following steps: S1: dispersing dioctyl phthalate and dioctyl sebacate phase change materials in a solvent to obtain a dispersion; S2: removing the solvent in the dispersion to obtain a cold-resistant agent.

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, and the amount of dioctyl phthalate is 6-30% of the mass of the dioctyl sebacate phase change material.

3. The cold-resistant PVC conveyor belt surface material according to claim 1, characterized in that: Specifically, the S2 is to place the dispersion in a vacuum environment of -0.098 to -0.095 MPa, and rotary evaporate to a constant weight at 30-35° C. to obtain the cold-resistant agent.

4. The cold-resistant PVC conveyor belt surface material according to claim 1, characterized in that: The anti-aging agent is a lignin-rare earth complex, which is prepared by the following steps: (1) Alkali lignin is dispersed in an ionic liquid to form a solution, and then the solution is injected into an organic solvent. The precipitate is collected after centrifugation, and the precipitate is freeze-dried to obtain an alkali lignin porous powder; (2) Dissolve ammonium cerium nitrate in deionized water, add the alkali lignin porous powder, and perform ultrasonic treatment, filtration, and drying in sequence to obtain Ce 3+ @lignin complex; (3) The Ce 3+ The lignin complex was immersed in a glycerol aqueous solution and freeze-dried to obtain antifreeze Ce. 3+ @lignin complex; (4) The antifreeze Ce 3+ The lignin complex is dispersed in a buffer solution, dopamine hydrochloride is added for reaction, and the lignin-rare earth complex is obtained after centrifugal drying.

5. The cold-resistant PVC conveyor belt surface material according to claim 4, 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; and the buffer is tris(hydroxymethyl)aminomethane hydrochloride buffer.

6. The cold-resistant PVC conveyor belt surface material according to claim 4, characterized in that: The amount of the ionic liquid is 8-9 times the amount of the alkali lignin; 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 the dopamine hydrochloride is 100% of the antifreeze Ce 3+ @4-5% of the mass of the lignin complex.

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

8. The cold-resistant PVC conveyor belt surface material according to any one of claims 1 to 7, characterized in that: The cold-resistant PVC conveyor belt surface material also includes, by weight, 12-23 parts of fluorine-containing 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.

9. The cold-resistant PVC conveyor belt surface material according to claim 8, characterized in that: The fluorine-containing plasticizer is a 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, perfluorooctylethanesulfonic acid-siloxane ester, and dodecafluoroheptanoic acid propyltrimethoxysilane.

10. A lightweight conveyor belt, characterized in that: The cold-resistant PVC conveyor belt surface layer material comprises the cold-resistant PVC conveyor belt surface layer material according to claim 9.

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