阅读说明：本技术 具有耐高温、阻燃与耐油的橡胶输送带及其制造工艺 (High-temperature-resistant, flame-retardant and oil-resistant rubber conveyer belt and manufacturing process thereof ) 是由 李警 李论 李陈东旭 李丹 黄奕钢 陈青 王若文 李思全 于 2020-06-08 设计创作，主要内容包括：本发明公开了一种具有耐高温、阻燃与耐油的橡胶输送带及其制造工艺,该输送带包括骨架层,骨架层的两侧均设有边胶,顶部设有上盖胶,底部设有下盖胶；其中上盖胶包括由上至下依次设置的第一上盖胶层、第二上盖胶层、第三上盖胶层、第四上盖胶层和第五上盖胶层,第一上盖胶层的基体材料为氟橡胶,第二上盖胶层的基体材料为丙烯酸酯橡胶和或乙烯丙烯酸酯橡胶,第三和第五上盖胶层的基体材料为氟橡胶,第四上盖胶层的基体材料为硅橡胶。该输送带制备成型后经过2段硫化得到成品,其采用氟橡胶、硅橡胶、和丙烯酸酯橡胶的复合橡胶结构,既具有优异的耐高低温性能,又具有阻燃性能和耐油性能。(The invention discloses a high-temperature-resistant, flame-retardant and oil-resistant rubber conveyer belt and a manufacturing process thereof, wherein the conveyer belt comprises a framework layer, edge rubber is arranged on two sides of the framework layer, upper cover rubber is arranged on the top of the framework layer, and lower cover rubber is arranged on the bottom of the framework layer; wherein the upper cover glue comprises a first upper cover glue layer, a second upper cover glue layer, a third upper cover glue layer, a fourth upper cover glue layer and a fifth upper cover glue layer which are sequentially arranged from top to bottom, the base material of the first upper cover glue layer is fluororubber, the base material of the second upper cover glue layer is acrylate rubber andor ethylene acrylate rubber, the base material of the third upper cover glue layer and the base material of the fifth upper cover glue layer are fluororubber, and the base material of the fourth upper cover glue layer is silicon rubber. The conveyor belt is prepared and molded, and then is vulcanized in 2 sections to obtain a finished product, the finished product adopts a composite rubber structure of fluororubber, silicon rubber and acrylate rubber, and has excellent high and low temperature resistance, flame retardance and oil resistance.)

1. The utility model provides a rubber conveyer belt with high temperature resistant, fire-retardant and resistant oil which characterized in that: the conveying belt comprises a framework layer (2), wherein edge glue (4) is arranged on two sides of the framework layer, upper cover glue (1) is arranged at the top of the framework layer, and lower cover glue (3) is arranged at the bottom of the framework layer; the upper cover rubber comprises a first upper cover rubber layer (1-1), a second upper cover rubber layer (1-2), a third upper cover rubber layer (1-3), a fourth upper cover rubber layer (1-4) and a fifth upper cover rubber layer (1-5) which are sequentially arranged from top to bottom, the base material of the first upper cover rubber layer is fluororubber, the base material of the second upper cover rubber layer is acrylate rubber and/or ethylene acrylate rubber, the base material of the third upper cover rubber layer and the base material of the fifth upper cover rubber layer are fluororubber, and the base material of the fourth upper cover rubber layer is silicon rubber.

2. The rubber conveyor belt of claim 1, wherein: the framework layer (2) is positioned between the upper cover rubber (1) and the lower cover rubber (3) and is an aramid fiber or polyester fiber reinforced layer, the upper and lower parts of the framework layer (2) are provided with adhesive coating layers, and the base materials of the adhesive coating and the adhesive coating are acrylate rubber and/or ethylene acrylate rubber.

3. The rubber conveyor belt of claim 1, wherein: the thickness of the third upper cover glue layer and the thickness of the fifth upper cover glue layer are both controlled to be 0.15 +/-0.05 mm.

4. The rubber conveyor belt of claim 1, wherein: the third upper cover glue layer (1-3), the fourth upper cover glue layer (1-4) and the fifth upper cover glue layer (1-5) are all added with peroxide vulcanizing agent except the base material.

5. The rubber conveyor belt of claim 1, wherein: the base materials of the lower cover rubber (3) and the edge rubber (4) are both acrylate rubber and/or ethylene acrylate rubber.

6. The rubber conveyor belt according to any one of claims 1 to 5, wherein: wherein each glue layer comprises an addition auxiliary agent besides the matrix material.

7. A method for producing a rubber belt according to any one of claims 1 to 6, comprising the steps of:

1) respectively processing the rubber materials of each rubber layer to prepare a rubber compound, and then rolling the rubber compound into sheets;

2) firstly rubbing and then pasting the adhesive sheet on the framework layer by a calender to form a rubbing adhesive layer;

3) compounding each layer of glue of the upper cover glue layer through a conveyor belt forming machine, completely compounding the framework layers, and installing edge glue strips on two sides of the framework layers; compounding the upper cover glue layer, the framework layer and the lower cover glue layer into a semi-finished product of the conveying belt;

4) smearing a release agent on the semi-finished product of the conveying belt, drawing and guiding the release agent into a rubber flat vulcanizing machine, closing the die and exhausting, and performing first-stage vulcanization; drawing and leading out after vulcanization, trimming and coiling;

5) and 4) drawing the product obtained in the step 4) and guiding the product into a hot air vulcanization drying tunnel or a vulcanizing tank for secondary vulcanization to obtain the high-temperature-resistant, flame-retardant and oil-resistant rubber conveying belt.

8. The method of claim 7, wherein: wherein the steam pressure of the first-stage vulcanization is 0.4-0.5Mpa, the temperature is 145-155 ℃, and the vulcanization time is 45-90 minutes.

9. The method of claim 7, wherein: wherein the secondary vulcanization temperature is 170-180 ℃, and the vulcanization time is 1-4 hours.

10. Use of the high temperature, flame and oil resistant rubber conveyor belt according to any one of claims 1 to 6 for material conveying at a high temperature of 220 to 800 ℃ or at an ultra high temperature.

Technical Field

The invention relates to the field of rubber products, in particular to a high-temperature-resistant, flame-retardant and oil-resistant rubber conveying belt and a manufacturing process thereof.

Background

The rubber conveyer belt is widely applied to industries such as coal, cement, metallurgy, harbors, building materials, chemical industry and the like, the industries such as cement, metallurgy and the like have higher and higher requirements on the performances such as high temperature resistance, flame retardance, oil resistance and the like of the rubber conveyer belt, for example, when the rubber conveyer belt is used for conveying sintered ore, coke, cement clinker, dried cement, chemical fertilizer and lime, the rubber conveyer belt must have high temperature resistance and flame retardance and certain oil resistance, so that the influence of lubricating oil products of conveying equipment on the rubber conveyer belt in the use process of the rubber conveyer belt can be effectively avoided, and the service life of the conveyer belt is prevented from being; at present, the rubber conveying belt with high temperature resistance, flame retardance and oil resistance is provided, so that the rubber conveying belt is applied to conveying of high-temperature or ultrahigh-temperature materials in the cement industry and the metallurgy industry and becomes a mainstream trend.

The high-temperature-resistant and flame-retardant rubber conveyer belt is generally formed by compounding an upper cover rubber layer, a middle reinforcing framework layer and a lower cover rubber layer. The working surface is an upper cover rubber layer which is generally formed by Styrene Butadiene Rubber (SBR), Chloroprene Rubber (CR), Ethylene Propylene Diene Monomer (EPDM), butyl series rubber (IIR, CIIR and BIIR), chlorinated polyethylene rubber (CM), chlorosulfonated polyethylene rubber (CSM) and the like. When the upper cover glue layer conveys high-temperature materials with the temperature of more than 200 ℃, the surface of the upper cover glue layer can be instantaneously burnt when contacting the high-temperature hot materials, if the temperature is continuously increased, the aging of the upper cover glue layer on the rubber conveyor belt is rapidly accelerated, and under the action of the combined stress of the impact of the high-temperature materials, the movement and the winding of the conveyor belt and the like, the performance of the upper cover glue layer on the conveyor belt is reduced due to the long-term heating, the action of oxygen, ozone, oil and the like, so that the high-temperature heat is directly transmitted to the inside of the belt body, the aging and the performance of the belt body are reduced, and.

In order to solve the problem that the service life of the rubber conveying belt is extremely short under the high-temperature condition, manufacturers in the rubber conveying belt industry generally adopt the following methods: firstly, a large amount of flame retardant is added into the rubber body, so that the cost is increased, and the performances of impact resistance, tear resistance, interlayer adhesion and the like of the conveying belt are greatly reduced; and secondly, high-temperature-resistant framework materials such as expensive aramid fibers, glass fibers influencing interlayer adhesion, stone black fabrics reducing physical properties and various steel wire structures with large heat conductivity coefficient, quick heat transfer and no heat insulation are adopted, and through structural change of the framework materials, a layer of asbestos cloth or glass fiber cloth covers a cover glue layer on a conveyor belt, a metal steel wire layer is adopted as a belt core tensile body and the like. Although the heat resistance of the rubber conveyer belt can be improved to a certain extent by the structure, the defect of high temperature resistance of the rubber material of the body cannot be completely solved by the auxiliary reinforcing measures.

Disclosure of Invention

The invention provides a high-temperature-resistant, flame-retardant and oil-resistant rubber conveyer belt and a manufacturing process thereof.

The technical scheme includes that the rubber conveying belt with high temperature resistance, flame retardance and oil resistance comprises a framework layer, edge rubber is arranged on two sides of the framework layer, upper cover rubber is arranged on the top of the framework layer, and lower cover rubber is arranged on the bottom of the framework layer; the upper cover rubber comprises a first upper cover rubber layer, a second upper cover rubber layer, a third upper cover rubber layer, a fourth upper cover rubber layer and a fifth upper cover rubber layer which are sequentially arranged from top to bottom, the base material of the first upper cover rubber layer is fluororubber, the base material of the second upper cover rubber layer is acrylate rubber and/or ethylene acrylate rubber, the base material of the third upper cover rubber layer and the base material of the fifth upper cover rubber layer are fluororubber, and the base material of the fourth upper cover rubber layer is silicon rubber.

Furthermore, the framework layer is positioned between the upper cover and the lower cover rubber and is an aramid fiber or polyester fiber reinforced layer, the upper part and the lower part of the framework layer are both provided with a rubberizing layer, and the base materials of the rubberizing and the rubberizing are both acrylate rubber and/or ethylene acrylate rubber.

Further, the thickness of the third upper cover glue layer and the thickness of the fifth upper cover glue layer are both controlled to be 0.15 +/-0.05 mm.

Furthermore, except for the base material, peroxide vulcanizing agents are added into the third upper cover glue layer, the fourth upper cover glue layer and the fifth upper cover glue layer.

Further, the base materials of the lower cover and the edge rubber are both acrylate rubber and/or ethylene acrylate rubber.

Furthermore, each glue layer comprises an addition auxiliary agent besides the matrix material.

The invention also relates to a preparation method of the rubber conveying belt, which comprises the following steps:

1) respectively processing the rubber materials of each rubber layer to prepare a rubber compound, and then rolling the rubber compound into sheets;

2) firstly rubbing and then pasting the adhesive sheet on the framework layer by a calender to form a rubbing adhesive layer;

3) compounding each layer of glue of the upper cover glue layer through a conveyor belt forming machine, completely compounding the framework layers, and installing edge glue strips on two sides of the framework layers; compounding the upper cover glue layer, the framework layer and the lower cover glue layer into a semi-finished product of the conveying belt;

4) smearing a release agent on the semi-finished product of the conveying belt, drawing and guiding the release agent into a rubber flat vulcanizing machine, closing the die and exhausting, and performing first-stage vulcanization; drawing and leading out after vulcanization, trimming and coiling;

5) and 4) drawing the product obtained in the step 4) and guiding the product into a hot air vulcanization drying tunnel or a vulcanizing tank for secondary vulcanization to obtain the high-temperature-resistant, flame-retardant and oil-resistant rubber conveying belt.

Further, the steam pressure of the first-stage vulcanization is 0.4-0.5Mpa, the temperature is 145-155 ℃, and the vulcanization time is 45-90 minutes.

Further, the secondary vulcanization temperature is 170-180 ℃, and the vulcanization time is 1-4 hours.

The invention also relates to application of the high-temperature-resistant, flame-retardant and oil-resistant rubber conveying belt in material conveying at a high temperature of 220-800 ℃ or at an ultrahigh temperature. The rubber conveyer belt is applied to the conveying in the cement industry and the metallurgical industry.

The rubber conveyer belt is a tubular conveyer belt, a flange conveyer belt or a lifting conveyer belt.

The invention has the following beneficial effects:

1. the conveying belt manufactured by adopting the composite structure of the fluororubber/the acrylate rubber/the fluororubber/the silicone rubber/the fluororubber/the acrylate rubber is a great breakthrough of the structure of the ultra-high temperature resistant product in the conveying belt industry. The outermost layer is provided with the fluororubber, so that the fluororubber has excellent high-temperature resistance, and the interlayer adhesion of the fluororubber and the silicone rubber is a global technical problem in the rubber industry. The invention can effectively improve the interlayer adhesion between materials and improve the low-temperature performance of the fluororubber by controlling the thickness of the fluororubber to be 0.1-0.2mm, so that the low-temperature brittleness can be improved from-18 ℃ to-40 ℃, and the cost can be effectively reduced.

2. The improvement of the adhesive performance is facilitated by adding peroxide curing agents to the third, fourth and fifth supersize layers, and the interlayer adhesive performance reaches or exceeds the german mass 52600 standard, the U.S. GMW13408 standard, the U.S. CUMMINS25023 standard and the U.S. truck TMS6034 standard.

3. Because the upper cover glue layer adopts a composite structure of Fluororubber (FPM), silicon rubber (VMQ) and acrylate rubber (AEM, AEM/ACM) and adopts a peroxide vulcanization system, after a vulcanizing agent decomposes a high polymer for reaction, firstly, low molecular compounds (such as benzene, benzoic acid and the like) are generated and exist in rubber to influence the mechanical property of the rubber; secondly, after the first stage of heating, the crosslinking density of the product is not enough. Therefore, the invention adopts a two-stage vulcanization process during preparation, and can effectively improve the mechanical properties such as crosslinking density, tensile strength and the like, compression set property, rebound resilience and thermal stability of the Fluororubber (FPM), the silicone rubber (VMQ) and the acrylate rubber (AEM, ACM and AEM/ACM). If the hot air vulcanization of the drying tunnel is adopted during the second-stage vulcanization, the hot air continuous vulcanization efficiency of the drying tunnel is high, and the second-stage vulcanized product is heated more uniformly and has more balanced performance.

Drawings

FIG. 1 is a schematic cross-sectional view of a rubber conveyor belt according to the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention.

As shown in fig. 1, the rubber conveyor belt with high temperature resistance, flame retardance and oil resistance comprises a framework layer 2, edge glue 4 is arranged on two sides of the framework layer, upper cover glue 1 is arranged on the top of the framework layer, and lower cover glue 3 is arranged on the bottom of the framework layer; the upper cover glue comprises a first upper cover glue layer 1-1, a second upper cover glue layer 1-2, a third upper cover glue layer 1-3, a fourth upper cover glue layer 1-4 and a fifth upper cover glue layer 1-5 which are sequentially arranged from top to bottom, wherein the base material of the first upper cover glue layer is fluororubber, the base material of the second upper cover glue layer is acrylate rubber, the base material of the third upper cover glue layer and the base material of the fifth upper cover glue layer are fluororubber, and the base material of the fourth upper cover glue layer is silicon rubber. Wherein the first upper cover rubber layer is preferably bisphenol fluorine rubber, and the third and fifth upper cover rubber layers are preferably peroxide fluorine rubber. The fourth upper cover glue layer is preferably made of gas phase silicone rubber. The base material of the second, upper coverstock layer may be an acrylate rubber, an ethylene acrylate rubber, or a combination of both.

Preferably, the framework layer 2 is located between the upper cover rubber 1 and the lower cover rubber 3 and is an aramid fiber or polyester fiber reinforced layer, the upper and lower parts of the framework layer 2 are both provided with a rubber rubbing layer, and the matrix materials of the rubber rubbing layer and the rubber rubbing layer are both acrylate rubber and/or ethylene acrylate rubber.

Preferably, the thickness of the third upper cover glue layer and the thickness of the fifth upper cover glue layer are both controlled to be 0.15 +/-0.05 mm.

Preferably, the third upper cover rubber layer 1-3, the fourth upper cover rubber layer 1-4 and the fifth upper cover rubber layer 1-5 are added with peroxide curing agent except for the base material.

Preferably, the base materials of the lower cover rubber 3 and the edge rubber 4 are both acrylate rubber and/or ethylene acrylate rubber.

Preferably, each glue layer comprises, in addition to the matrix material, an addition aid.

In a specific case, the materials of each adhesive layer are mixed according to the following proportion, and the specific dosage is selected according to the proportion according to the size of the manufacturing equipment.