Low-temperature-resistant all-terrain rubber belt as well as preparation method and application thereof

Abstract

The invention provides a low-temperature-resistant all-terrain rubber belt as well as a preparation method and application thereof, and belongs to the technical field of rubber belts. The aramid canvas in the low-temperature-resistant all-terrain rubber belt provided by the invention has the properties of low temperature resistance, light weight, good flexibility and the like; smoked sheet rubber and butadiene rubber which are good in low temperature resistance are selected in the covering rubber, and the smoked sheet rubber and the butadiene rubber are used for weakening the regularity of macromolecular chains, so that the cold resistance is improved; the cold resistance of the rubber material can be obviously improved by controlling the composition of the middle core rubber; the covering rubber adopts a semi-effective vulcanization system, the generation of polysulfide bonds is reduced, monosulfide bonds and disulfide bonds are mainly generated, and the possibility of combining sulfur in molecules is reduced, so that the glass transition temperature rise amplitude is small, and the cold resistance of the covering rubber is improved; the structure of the rubber belt and the composition of the covering rubber and the middle core rubber are controlled, the cold resistance of the rubber belt is improved, the rubber belt can be used under the environment condition of-60 DEG C, and meanwhile the rubber belt is small in thickness and light in weight.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber belts, and in particular relates to a low-temperature resistant all-terrain rubber belt and a preparation method and application thereof. Background Art

[0002] Rubber tracks have many excellent properties and are widely used on various vehicles. However, they lose elasticity and flexibility in low temperature environments, become fragile and easy to break, making them unusable in low temperature environments. Metal (steel) rubber chain tracks combine the characteristics of metal and rubber and can be used in certain low temperature environments. However, in an environment of -60°C, the grain structure of steel will also change, making it more difficult to slip between grains, thereby reducing the stiffness, plasticity and toughness of steel tracks, causing the steel to become stronger and more brittle, making it limited to use in an environment with an ambient temperature of -45°C. At the same time, its thickness and weight increase by 2 times, which also affects the mobility of the entire vehicle.

[0003] Therefore, there is an urgent need for a low-temperature resistant (-60° C.) rubber belt. Summary of the invention

[0004] The purpose of the present invention is to provide a low-temperature resistant all-terrain rubber belt and a preparation method and application thereof. The rubber belt provided by the present invention still has excellent performance at -60°C, and is thin in thickness and light in weight.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] The present invention provides a low-temperature resistant all-terrain rubber belt, comprising aramid canvas, cover rubber covering the upper and lower surfaces of the aramid canvas, and edge rubber covering the side surfaces of the aramid canvas, wherein the aramid canvas, the cover rubber, and the edge rubber are bonded by an intermediate core rubber;

[0007] The covering rubber comprises the following raw materials, which are vulcanized by a semi-effective vulcanization system: butadiene rubber, brominated epoxy resin, smoked rubber, high-vinyl polybutadiene rubber, activator, accelerator, antioxidant, coupling agent, carbon nanotubes, medium-super carbon black, softener and sulfur;

[0008] The intermediate core rubber comprises the following components: petroleum resin, vulcanized rubber powder, short fibers, octyl adipate, white carbon black and coupling agent Si-69.

[0009] Preferably, the method for preparing the covering glue comprises the following steps:

[0010] (1) mixing butadiene rubber, brominated epoxy resin and smoked sheet rubber to obtain a masterbatch;

[0011] (2) performing a second mixing of the masterbatch obtained in step (1) with high vinyl polybutadiene rubber, an activator, a accelerator, an antioxidant, a coupling agent, carbon nanotubes, medium super carbon black and a softener to obtain a first stage rubber;

[0012] (3) Mixing the rubber obtained in step (2) with sulfur and vulcanizing the mixture to obtain a covering rubber.

[0013] Preferably, in step (1), the mass percentages of butadiene rubber, brominated epoxy resin and smoked sheet rubber are 20-30%, 30-40% and 40-50% respectively.

[0014] Preferably, in the step (2), the mass ratio of the masterbatch, high vinyl polybutadiene rubber, activator, promoter, antioxidant, coupling agent, carbon nanotubes, medium super carbon black and softener is 100: (20-30): (10-15): (1-5): (15-20): (10-12): (25-30): (0.5-2): (0.1-1).

[0015] Preferably, in step (3), the mass ratio of the first-stage rubber to the sulfur is 100:(1-3).

[0016] Preferably, in step (3), the vulcanization temperature is 150-155° C., the vulcanization time is 30-40 min, and the vulcanization unit surface pressure is 2-4 MPa.

[0017] Preferably, the mass percentages of petroleum resin, vulcanized rubber powder, short fiber, octyl adipate, white carbon black and coupling agent Si-69 in the intermediate core rubber are 30-35%, 20-30%, 1-10%, 1-10%, 10-12% and 20-22% respectively.

[0018] Preferably, the thickness of the aramid canvas is 5-7 mm, the thickness of the cover glue is 2-4 mm, and the thickness of the edge glue is 0.5-1.5 mm.

[0019] The present invention also provides a method for preparing the low-temperature resistant all-terrain rubber belt described in the above technical solution, comprising the following steps:

[0020] The middle core rubber is coated on the upper and lower surfaces and sides of the aramid canvas, and then the upper and lower surfaces of the aramid canvas are covered with cover rubber and the sides are covered with edge rubber, and then pressed together to obtain a low-temperature resistant all-terrain rubber belt.

[0021] The present invention also provides the use of the low-temperature resistant all-terrain rubber belt described in the above technical solution or the low-temperature resistant all-terrain rubber belt prepared according to the preparation method described in the above technical solution in a low-temperature environment.

[0022] The present invention provides a low-temperature resistant all-terrain rubber belt, comprising aramid canvas, covering rubber covering the upper and lower surfaces of the aramid canvas and edge rubber covering the side surfaces of the aramid canvas, wherein the aramid canvas, the covering rubber and the edge rubber are bonded to each other via an intermediate core rubber; the covering rubber comprises the following raw materials vulcanized by a semi-effective vulcanization system: butadiene rubber, brominated epoxy resin, smoked sheet rubber, high vinyl polybutadiene rubber, activator, accelerator, antioxidant, coupling agent, carbon nanotubes, medium super carbon black, softener and sulfur; the intermediate core rubber comprises the following components: petroleum resin, vulcanized rubber powder, short fiber, octyl adipate, white carbon black and coupling agent Si-69. The low-temperature resistant all-terrain rubber belt provided by the present invention comprises aramid canvas, covering rubber covering the upper and lower surfaces of the aramid canvas and edge rubber covering the side of the aramid canvas, the aramid canvas and the covering rubber and the edge rubber are bonded by an intermediate core rubber, and the aramid canvas has the properties of high strength, high wear resistance, low temperature resistance, light weight, good flexibility, etc.; smoked sheet rubber and butadiene rubber with good low-temperature resistance are selected in the covering rubber, and the two rubbers are used together to weaken the regularity of the macromolecular chain, thereby improving the cold resistance; the composition of the intermediate core rubber is controlled, and a reinforcing agent with good low-temperature effect (petroleum resin, vulcanized rubber powder, short fiber) is used ) and cold-resistant plasticizer (octyl adipate), which can significantly improve the cold resistance of the rubber material; the cover rubber is obtained by vulcanization, and the vulcanization system adopts a semi-effective vulcanization system to reduce the formation of polysulfide bonds, mainly generating monosulfide bonds and disulfide bonds, and the possibility of sulfur binding in the molecule is reduced, so the glass transition temperature rises slightly, thereby improving its cold resistance, and the white carbon black and Si-69 in the middle core rubber improve the anti-slip property and vulcanization reversion; the structure of the rubber belt, the composition of the cover rubber and the middle core rubber are controlled to improve the cold resistance of the rubber belt, which can be used under -60°C environmental conditions, and the rubber belt is thin and light in weight. The results of the embodiment show that the performance of the rubber belt provided by the present invention at -60°C is consistent with that at room temperature, and has excellent low temperature resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the low-temperature resistant all-terrain rubber belt provided by the present invention connected to the ground frame through bolts and nuts, wherein 1 is the ground frame, 2 is the low-temperature resistant all-terrain rubber belt, 3 is the bolt, and 4 is the nut;

[0024] Figure 2 A schematic diagram of the structure of the low-temperature resistant all-terrain rubber belt provided by the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of the low-temperature resistant all-terrain rubber belt provided by the present invention, wherein 5 is upper and lower covering rubber, 6 is middle core rubber, and 7 is aramid canvas. DETAILED DESCRIPTION

[0026] The present invention provides a low-temperature resistant all-terrain rubber belt, comprising aramid canvas, cover rubber covering the upper and lower surfaces of the aramid canvas, and edge rubber covering the side surfaces of the aramid canvas, wherein the aramid canvas, the cover rubber, and the edge rubber are bonded by an intermediate core rubber;

[0027] The covering rubber comprises the following raw materials, which are vulcanized by a semi-effective vulcanization system: butadiene rubber, brominated epoxy resin, smoked rubber, high-vinyl polybutadiene rubber, activator, accelerator, antioxidant, coupling agent, carbon nanotubes, medium-super carbon black, softener and sulfur;

[0028] The intermediate core rubber comprises the following components: petroleum resin, vulcanized rubber powder, short fibers, octyl adipate, white carbon black and coupling agent Si-69.

[0029] Unless otherwise specified, the present invention has no particular limitation on the sources of the components, and commercially available products known to those skilled in the art may be used.

[0030] The low temperature resistant all-terrain rubber belt provided by the present invention comprises aramid canvas. In the present invention, the aramid canvas has the properties of high strength, high wear resistance, low temperature resistance, light weight, good flexibility, etc., so that the rubber belt has light weight, thin thickness and low temperature resistance.

[0031] In the present invention, the thickness of the aramid canvas is preferably 5-7 mm, more preferably 6 mm. The present invention limits the thickness of the aramid canvas to the above range, which can further improve various properties of the rubber belt.

[0032] The present invention has no special limitation on the source of the aramid canvas, and a commercial product known to those skilled in the art can be used. In an embodiment of the present invention, the aramid canvas is DPP2500 produced by Harbin Northern Defense Equipment Co., Ltd.

[0033] The low-temperature resistant all-terrain rubber belt provided by the present invention further comprises covering rubber covering the upper and lower surfaces of the aramid canvas.

[0034] In the present invention, the covering rubber comprises the following raw materials vulcanized by a semi-effective vulcanization system: butadiene rubber, brominated epoxy resin, smoked sheet rubber, high vinyl polybutadiene rubber, activator, accelerator, antioxidant, coupling agent, carbon nanotubes, medium super carbon black, softener and sulfur.

[0035] In the present invention, the method for preparing the covering glue preferably comprises the following steps:

[0036] (1) mixing butadiene rubber, brominated epoxy resin and smoked sheet rubber to obtain a masterbatch;

[0037] (2) performing a second mixing of the masterbatch obtained in step (1) with high vinyl polybutadiene rubber, an activator, a accelerator, an antioxidant, a coupling agent, carbon nanotubes, medium super carbon black and a softener to obtain a first stage rubber;

[0038] (3) Mixing the rubber obtained in step (2) with sulfur and vulcanizing the mixture to obtain a covering rubber.

[0039] In the present invention, the butadiene rubber, the brominated epoxy resin and the smoked sheet rubber are preferably first mixed to obtain a masterbatch.

[0040] In the present invention, the mass percentages of the butadiene rubber, brominated epoxy resin and smoked sheet rubber are preferably 20-30%, 30-40% and 40-50%, respectively, more preferably 20-25%, 35-40% and 40-45%, and further preferably 24%, 36% and 40%. The present invention selects smoked sheet rubber and butadiene rubber with good low temperature resistance, and the two rubbers are used together to weaken the regularity of the macromolecular chain, thereby improving the cold resistance. The present invention controls the mass percentages of butadiene rubber, brominated epoxy resin and smoked sheet rubber within the above range, which can further improve the low temperature resistance of the rubber belt.

[0041] The present invention has no special limitation on the first mixing operation, and the raw materials can be mixed evenly using a mixing technical solution well known to those skilled in the art.

[0042] After obtaining the masterbatch, the present invention preferably performs a second mixing of the masterbatch with high vinyl polybutadiene rubber, an activator, a promoter, an antioxidant, a coupling agent, carbon nanotubes, medium super carbon black and a softener to obtain a first stage rubber.

[0043] In the present invention, the masterbatch is preferably left standing for at least 8 hours before use, and then the second mixing is performed. In the present invention, the masterbatch is left standing for at least 8 hours, which can further improve the dispersion uniformity of each raw material.

[0044] In the present invention, the activator is preferably lead oxide; the promoter is preferably dithiocarbamate; the antioxidant is preferably antioxidant 4010; the coupling agent is preferably titanate coupling agent; the diameter of the carbon nanotube is preferably 5 to 15 nm; the length of the carbon nanotube is preferably 40 to 100 μm; the softener is preferably paraffin oil. In an embodiment of the present invention, the carbon nanotube comes from Shandong Jingshi Dazhan Nano Technology Co., Ltd.

[0045] In the present invention, the mass ratio of the masterbatch, high vinyl polybutadiene rubber, activator, accelerator, antioxidant, coupling agent, carbon nanotube, medium super carbon black and softener is preferably 100: (20-30): (10-15): (1-5): (15-20): (10-12): (25-30): (0.5-2): (0.1-1), and more preferably 100: 25: 12.7: 3.5: 18.7: 10.5: 28: 1.1: 0.5. The present invention limits the mass ratio of each raw material to the above range, which can further improve the low temperature resistance of the rubber belt.

[0046] The present invention has no special limitation on the second mixing operation, and the raw materials can be mixed evenly using a mixing technical solution well known to those skilled in the art.

[0047] After obtaining a section of rubber, the present invention preferably mixes the section of rubber with sulfur and vulcanizes the mixture to obtain a covering rubber.

[0048] In the present invention, the one-stage rubber is preferably left standing for at least 8 hours before being vulcanized. In the present invention, leaving the one-stage rubber standing for at least 8 hours can further improve the dispersion uniformity of each raw material.

[0049] In the present invention, the mass ratio of the first-stage rubber to sulfur is preferably 100:(1-3), more preferably 100:(2-3). The present invention controls the mass ratio of the first-stage rubber to sulfur within the above range, which can make the vulcanization more complete.

[0050] In the present invention, the vulcanization temperature is preferably 150-155° C. In an embodiment of the present invention, the vulcanization temperature may be specifically 150° C., 151° C., 152° C., 153° C., 154° C. or 155° C.

[0051] In the present invention, the vulcanization time is preferably 30 to 40 minutes. In an embodiment of the present invention, the vulcanization time can be specifically 30 minutes, 32 minutes, 34 minutes, 36 minutes, 38 minutes or 40 minutes.

[0052] In the present invention, the unit surface pressure of the vulcanization is preferably 2-4 MPa. In the embodiment of the present invention, the unit surface pressure of the vulcanization can be specifically 2 MPa, 2.5 MPa, 3 MPa, 3.5 MPa or 4 MPa. The present invention controls the mass ratio of the first-stage rubber to the sulfur and the vulcanization parameters within the above range. The vulcanization parameters determine the bonding strength between the cover rubber and the aramid canvas. Too high a temperature will lead to over-vulcanization, which will reduce the bonding and abrasion. Too low a temperature will cause the wear resistance to fail to meet the requirements.

[0053] The vulcanization system used in the preparation of the covering rubber of the present invention is a semi-effective vulcanization system, which can reduce the generation of polysulfide bonds, mainly generate monosulfide bonds and disulfide bonds, and reduce the possibility of sulfur bonding in molecules, so the glass transition temperature rises slightly, thereby improving its cold resistance.

[0054] In the present invention, the thickness of the cover rubber is preferably 2 to 4 mm, more preferably 3 mm. In the present invention, the cover rubber plays a role in protecting the aramid canvas and withstanding the wear, impact, cutting, corrosion of the pulley during the driving process of the vehicle and the use in polar and extremely cold conditions. The present invention limits the thickness of the cover rubber to the above range, which can further improve the various properties of the rubber belt.

[0055] The low-temperature resistant all-terrain rubber belt provided by the present invention further comprises an edge glue covering the side surface of the aramid canvas.

[0056] In the present invention, the side surfaces preferably include four side surfaces.

[0057] In the present invention, the composition and preparation method of the edge glue are preferably the same as those of the cover glue, which will not be described in detail here.

[0058] In the present invention, the thickness of the edge glue is preferably 0.5-1.5 mm, more preferably 1 mm. The present invention limits the thickness of the edge glue to the above range, which can further improve various properties of the rubber belt.

[0059] In the present invention, the aramid canvas, the covering rubber and the edge rubber are bonded together by an intermediate core rubber.

[0060] In the present invention, the intermediate core rubber comprises the following components: petroleum resin, vulcanized rubber powder, short fibers, octyl adipate, white carbon black and coupling agent Si-69.

[0061] In the present invention, the short fibers are preferably cotton fibers. The present invention has no particular limitation on the length and diameter of the short fibers, and commercial short fibers well known to those skilled in the art can be used.

[0062] In the present invention, the mass percentages of petroleum resin, vulcanized rubber powder, short fibers, octyl adipate, white carbon black and coupling agent Si-69 in the intermediate core rubber are preferably 30-35%, 20-30%, 1-10%, 1-10%, 10-12% and 20-22%, respectively, and more preferably 33.3%, 25.4%, 5.3%, 5%, 10.2% and 20.8%. In the present invention, the intermediate core rubber adopts reinforcing agents (petroleum resin, vulcanized rubber powder, short fibers) and cold-resistant plasticizers (octyl adipate) with good low-temperature effects, which can significantly improve the cold resistance of the rubber material, and the white carbon black and Si-69 in the intermediate core rubber improve the anti-slip property and vulcanization reversion, further improving the cold resistance of the rubber belt. The present invention limits the amount of each component in the intermediate core rubber to the above range, which can further improve the cold resistance and other properties of the rubber belt.

[0063] In the present invention, the surface of the rubber belt preferably further includes holes. The holes on the surface of the rubber belt can be used to connect the rubber belt to the ground frame through bolts and nuts to form an annular belt. The size, shape and hole spacing of the holes are not particularly limited in the present invention, and can be selected according to actual needs.

[0064] The present invention controls the structure of the rubber belt, the composition of the covering rubber and the middle core rubber, improves the cold resistance of the rubber belt, and can be used in an environment of -60°C, solving the problem that the existing rubber crawler track cannot be used in an environment of -60°C. At the same time, the rubber belt is thin in thickness and light in weight. While ensuring that the strength and installation dimensions of the rubber belt remain unchanged, the thickness of the rubber belt is reduced compared with the thickness of the rubber belt in the prior art, the weight is reduced, and the tensile strength, elongation at break and bending deflection are increased, while other performance parameters are consistent with the normal temperature environment, so that the vehicle can travel in an environment of -60°C, has a long service life and improves the mobility of the entire vehicle; at the same time, it has a simple structure and a reasonable design, can save costs and improve work efficiency.

[0065] The low-temperature resistant all-terrain rubber belt provided by the present invention can be used at -60°C, and its plasticity and toughness do not change with temperature. It is suitable for traveling in various harsh environments, and its maneuverability is not reduced. It is not affected by the environment and meets the requirements of all-terrain design indicators.

[0066] The schematic diagram of the structure of the low temperature resistant all-terrain rubber belt provided by the present invention after being connected to the ground frame through bolts and nuts is as follows: Figure 1 As shown, 1 is the ground frame, 2 is the low-temperature resistant all-terrain rubber belt, 3 is the bolt, and 4 is the nut.

[0067] The structural schematic diagram of the low temperature resistant all-terrain rubber belt provided by the present invention is as follows Figure 2 shown.

[0068] The internal structure schematic diagram of the low temperature resistant all-terrain rubber belt provided by the present invention is as follows Figure 3As shown, 5 is the upper and lower covering rubber, 6 is the middle core rubber, and 7 is the aramid canvas.

[0069] The present invention also provides a method for preparing the low-temperature resistant all-terrain rubber belt described in the above technical solution, comprising the following steps:

[0070] The middle core rubber is coated on the upper and lower surfaces and sides of the aramid canvas, and then the upper and lower surfaces of the aramid canvas are covered with cover rubber and the sides are covered with edge rubber, and then pressed together to obtain a low-temperature resistant all-terrain rubber belt.

[0071] The present invention has no special limitation on the coating operation, and any coating technical solution well known to those skilled in the art may be used.

[0072] In the present invention, the coating thickness of the intermediate core adhesive is preferably 0.5-1.5 mm, more preferably 1 mm. The present invention limits the coating thickness of the intermediate core adhesive to the above range, which can achieve better bonding effect.

[0073] In the present invention, the lamination temperature is preferably 600-700°C; the lamination time is preferably 7-9h, more preferably 8h. The present invention limits the lamination temperature and time within the above ranges to enable each layer to be fully bonded.

[0074] The present invention also provides the use of the low-temperature resistant all-terrain rubber belt described in the above technical solution or the low-temperature resistant all-terrain rubber belt prepared according to the preparation method described in the above technical solution in a low-temperature environment.

[0075] The present invention has no special limitation on the operation of the application, and the technical solutions of the application well known to those skilled in the art may be adopted.

[0076] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0077] Example 1

[0078] A low-temperature resistant all-terrain rubber belt, comprising aramid canvas (6 mm thick), covering rubber covering the upper and lower surfaces of the aramid canvas (the upper covering rubber and the lower covering rubber are both 3 mm thick), and edge rubber covering the sides of the aramid canvas (four sides, each side has an edge rubber thickness of 1 mm), and the aramid canvas and the covering rubber and the edge rubber are bonded by an intermediate core rubber;

[0079] The preparation method of the covering rubber is as follows: (1) mixing butyl rubber, brominated epoxy resin and smoked rubber to obtain a masterbatch; the mass percentages of butyl rubber, brominated epoxy resin and smoked rubber are 24%, 36% and 40% respectively;

[0080] (2) the masterbatch obtained in step (1) is allowed to stand for 8 hours and then mixed with high vinyl polybutadiene rubber, activator (lead oxide), accelerator (dithiocarbamate), antioxidant (4010), coupling agent (titanium ester coupling agent), carbon nanotubes (diameter 5-15 nm, length 40-100 μm), medium super carbon black and softener (paraffin oil) to obtain a first-stage rubber; the mass ratio of the masterbatch, high vinyl polybutadiene rubber, activator, accelerator, antioxidant, coupling agent, carbon nanotubes, medium super carbon black and softener is 100:25:12.7:3.5:18.7:10.5:28:1.1:0.5;

[0081] (3) the first section of rubber obtained in step (2) is left to stand for 8 hours and then mixed with sulfur for vulcanization to obtain a covering rubber, wherein the mass ratio of the first section of rubber to sulfur is 100:2.4, the vulcanization temperature is 155° C., the vulcanization time is 35 min, and the unit surface pressure of the vulcanization is 3 MPa;

[0082] The preparation method of the edge glue is the same as that of the covering glue;

[0083] The intermediate core rubber is composed of the following components: petroleum resin, vulcanized rubber powder, short fiber (cotton fiber), octyl adipate, white carbon black and coupling agent Si-69, and the mass percentages of petroleum resin, vulcanized rubber powder, short fiber, octyl adipate, white carbon black and Si-69 are 33.3%, 25.4%, 5.3%, 5%, 10.2% and 20.8% respectively;

[0084] The preparation method of the low-temperature resistant all-terrain rubber belt is as follows: coating the upper and lower surfaces and sides of the aramid canvas with an intermediate core rubber (the thickness of the intermediate core rubber is 1 mm), and then covering the upper and lower surfaces of the aramid canvas with cover rubber and the sides with edge rubber, and then pressing them together to obtain the low-temperature resistant all-terrain rubber belt. The pressing temperature is 650°C and the pressing time is 8 hours.

[0085] Comparative Example 1

[0086] Commercially available rubber belt, thickness 20 mm.

[0087] The various properties of the low-temperature resistant all-terrain rubber belt provided in Example 1 and the rubber belt in Comparative Example 1 were tested, and the results are shown in Table 1.

[0088] Table 1 Various properties of the low temperature resistant all-terrain rubber belt provided in Example 1 and the rubber belt in Comparative Example 1

[0089]

[0090]

[0091] It can be seen from Table 1 that, while ensuring that the strength and installation dimensions of the rubber belt remain unchanged, the low-temperature resistant all-terrain rubber belt provided in Example 1 is 8 mm thinner and 40% lighter than the rubber belt in the prior art, and the tensile strength, elongation at break and bending deflection are all increased, while other performance parameters remain consistent with those in the normal temperature environment, so that the rubber belt is not restricted by the ambient temperature and can be driven in extremely cold polar conditions.

[0092] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A low-temperature resistant all-terrain rubber belt, comprising aramid canvas, cover rubber covering the upper and lower surfaces of the aramid canvas, and edge rubber covering the side of the aramid canvas, wherein the aramid canvas, the cover rubber, and the edge rubber are bonded by an intermediate core rubber; The covering rubber comprises the following raw materials, which are vulcanized by a semi-effective vulcanization system: butadiene rubber, brominated epoxy resin, smoked rubber, high-vinyl polybutadiene rubber, activator, accelerator, antioxidant, coupling agent, carbon nanotubes, medium-super carbon black, softener and sulfur; The intermediate core rubber comprises the following components: petroleum resin, vulcanized rubber powder, short fibers, octyl adipate, white carbon black and coupling agent Si-69.

2. The low temperature resistant all-terrain rubber belt according to claim 1, characterized in that: The preparation method of the covering glue comprises the following steps: (1) mixing butadiene rubber, brominated epoxy resin and smoked sheet rubber to obtain a masterbatch; (2) performing a second mixing of the masterbatch obtained in step (1) with high vinyl polybutadiene rubber, an activator, a accelerator, an antioxidant, a coupling agent, carbon nanotubes, medium super carbon black and a softener to obtain a first stage rubber; (3) Mixing the rubber obtained in step (2) with sulfur and vulcanizing the mixture to obtain a covering rubber.

3. The low temperature resistant all-terrain rubber belt according to claim 2, characterized in that: In the step (1), the mass percentages of butadiene rubber, brominated epoxy resin and tobacco sheet rubber are 20-30%, 30-40% and 40-50% respectively.

4. The low temperature resistant all-terrain rubber belt according to claim 2, characterized in that: In the step (2), the mass ratio of the masterbatch, high vinyl polybutadiene rubber, activator, promoter, antioxidant, coupling agent, carbon nanotubes, medium super carbon black and softener is 100: (20-30): (10-15): (1-5): (15-20): (10-12): (25-30): (0.5-2): (0.1-1).

5. The low temperature resistant all-terrain rubber belt according to claim 2, characterized in that: In the step (3), the mass ratio of the first-stage rubber to the sulfur is 100:(1-3).

6. The low temperature resistant all-terrain rubber belt according to claim 2, characterized in that: In the step (3), the vulcanization temperature is 150-155° C., the vulcanization time is 30-40 min, and the vulcanization unit surface pressure is 2-4 MPa.

7. The low temperature resistant all-terrain rubber belt according to claim 1, characterized in that: The mass percentages of petroleum resin, vulcanized rubber powder, short fibers, octyl adipate, white carbon black and coupling agent Si-69 in the intermediate core rubber are 30-35%, 20-30%, 1-10%, 1-10%, 10-12% and 20-22% respectively.

8. The low temperature resistant all-terrain rubber belt according to claim 1, characterized in that: The thickness of the aramid canvas is 5-7 mm, the thickness of the cover rubber is 2-4 mm, and the thickness of the edge rubber is 0.5-1.5 mm.

9. The method for preparing the low temperature resistant all-terrain rubber belt according to any one of claims 1 to 8, comprising the following steps: The middle core rubber is coated on the upper and lower surfaces and sides of the aramid canvas, and then the upper and lower surfaces of the aramid canvas are covered with cover rubber and the sides are covered with edge rubber, and then pressed together to obtain a low-temperature resistant all-terrain rubber belt.

10. Use of the low-temperature resistant all-terrain rubber belt according to any one of claims 1 to 8 or the low-temperature resistant all-terrain rubber belt prepared according to the preparation method according to claim 9 in a low-temperature environment.

Images