阅读说明：本技术 一种高温耐腐蚀型输送带及其制备方法 (High-temperature corrosion-resistant conveying belt and preparation method thereof ) 是由 寮轰寒 强亮 于 2019-11-23 设计创作，主要内容包括：本发明公开了一种高温耐腐蚀型输送带及其制备方法,涉及输送带技术领域,解决了因输送带在高温下的耐腐蚀性较差,而导致其表面在受到较大力的作用时容易产生裂缝的问题。一种高温耐腐蚀型输送带,其包括如下重量份数的组分：聚氯乙烯30-50份；丁腈橡胶20-40份；热塑性聚氨酯弹性体10-18份；PU胶6-8份；骨架织物40-50份；邻苯二甲酸二辛脂8-16份；硼酸锌4-8份；石蜡油2-3份；硫磺1-1.5份；二硫代氨基甲酸钠0.5-0.7份；硅酸铝3-5份；高炉矿渣微粉7-13份；增强填料12-16份；稳定剂4-6份。本发明中的高温耐腐蚀型输送带在高温下具有良好的耐腐蚀性,并在受到较大力的作用时不易产生裂缝,整体具有良好的稳定性。(The invention discloses a high-temperature corrosion-resistant conveying belt and a preparation method thereof, relates to the technical field of conveying belts, and solves the problem that cracks are easily generated on the surface of the conveying belt under the action of a large force due to poor corrosion resistance of the conveying belt at high temperature. A high-temperature corrosion-resistant conveying belt comprises the following components in parts by weight: 30-50 parts of polyvinyl chloride; 20-40 parts of nitrile rubber; 10-18 parts of a thermoplastic polyurethane elastomer; 6-8 parts of PU glue; 40-50 parts of skeleton fabric; 8-16 parts of dioctyl phthalate; 4-8 parts of zinc borate; 2-3 parts of paraffin oil; 1-1.5 parts of sulfur; 0.5-0.7 part of sodium dithiocarbamate; 3-5 parts of aluminum silicate; 7-13 parts of blast furnace slag micro powder; 12-16 parts of reinforcing filler; 4-6 parts of a stabilizer. The high-temperature corrosion-resistant conveying belt has good corrosion resistance at high temperature, is not easy to generate cracks under the action of large force, and has good stability as a whole.)

1. The high-temperature corrosion-resistant conveying belt is characterized by comprising the following components in parts by weight:

30-50 parts of polyvinyl chloride;

20-40 parts of nitrile rubber;

10-18 parts of a thermoplastic polyurethane elastomer;

6-8 parts of PU glue;

40-50 parts of skeleton fabric;

8-16 parts of dioctyl phthalate;

4-8 parts of zinc borate;

2-3 parts of paraffin oil;

1-1.5 parts of sulfur;

0.5-0.7 part of sodium dithiocarbamate;

3-5 parts of aluminum silicate;

7-13 parts of blast furnace slag micro powder;

12-16 parts of reinforcing filler;

4-6 parts of a stabilizer.

2. The high-temperature corrosion-resistant conveying belt according to claim 1, wherein 4-9 parts by weight of functional additives are further added into the components of the high-temperature corrosion-resistant conveying belt, and the functional additives are spun silk powder and Fe₃A mixture of Al intermetallic compounds, and sericite powder and Fe₃The weight part ratio of the Al intermetallic compound is (3-5) to 1.

3. The high-temperature corrosion-resistant conveying belt according to claim 1, wherein 6-14 parts by weight of mineral wool fibers are further added to the components of the high-temperature corrosion-resistant conveying belt.

4. The high-temperature corrosion-resistant conveying belt according to claim 1, wherein the framework fabric is any one of polyester fabric, polyester-cotton fabric, aramid fabric and acrylic fabric.

5. The high-temperature corrosion-resistant conveying belt according to claim 1, wherein the reinforcing filler is selected from any one or more of boron nitride, corundum powder, expanded perlite and silicon dioxide.

6. The high-temperature corrosion-resistant conveying belt according to claim 1, wherein the stabilizer is any one of magnesium stearate, alkyl vinyl ester, phenyl ortho-hydroxybenzoate and polyethylene wax.

7. A method of manufacturing a high-temperature corrosion-resistant conveyor belt according to claim 1, comprising the steps of:

step one, drying the fabric: drying the skeleton fabric in corresponding parts by weight, and placing for later use;

step two, brushing glue and curing: then uniformly blade-coating PU glue in corresponding weight parts on the front and back surfaces of the framework fabric to form an adhesive layer;

step three, melt extrusion: fully stirring and mixing polyvinyl chloride, nitrile rubber, a thermoplastic polyurethane elastomer, dioctyl phthalate, zinc borate, paraffin oil, sulfur, sodium dithiocarbamate, aluminum silicate, blast furnace slag micro powder, a reinforcing filler and a stabilizer in corresponding parts by weight, and then melting and extruding to obtain a rubber layer;

step four, laminating and hot pressing: and (3) attaching the rubber layer to one side of the adhesive layer, which is far away from the framework fabric, performing hot-pressing attachment, and cooling to obtain the high-temperature corrosion-resistant conveying belt.

8. The method for preparing a high-temperature corrosion-resistant conveying belt according to claim 7, which comprises the following steps:

step one, drying the fabric: drying the skeleton fabric in the corresponding weight part at the drying temperature of 150 ℃ and 170 ℃ for 5-10min, and standing for later use;

step two, brushing glue and curing: then uniformly blade-coating PU glue in corresponding weight parts on the front side and the back side of the framework fabric, and brushing at the temperature of 150 ℃ and 170 ℃ to form an adhesive layer;

step three, melt extrusion: fully stirring and mixing polyvinyl chloride, nitrile rubber, a thermoplastic polyurethane elastomer, dioctyl phthalate, zinc borate, paraffin oil, sulfur, sodium dithiocarbamate, aluminum silicate, blast furnace slag micro powder, a reinforcing filler and a stabilizer in corresponding parts by weight, wherein the stirring speed is 1500-2500rpm, the stirring time is 10-20min, the melt extrusion is carried out, the melt extrusion temperature is 165-175 ℃, and the screw extrusion rotation speed is 25-35rpm, so as to obtain a rubber layer;

step four, laminating and hot pressing: and (3) attaching the rubber layer to one side of the adhesive layer, which is far away from the framework fabric, performing hot-pressing attachment, wherein the hot-pressing temperature is 80-90 ℃, the hot-pressing time is 3-5min, and the pressure is 20-30MPa, and cooling to obtain the high-temperature corrosion-resistant conveying belt.

Technical Field

The invention relates to the technical field of conveying belts, in particular to a high-temperature corrosion-resistant conveying belt and a preparation method thereof.

Background

The conveyer belt, also called conveyer belt, is a composite product of rubber, fiber and metal, or a composite product of plastic and fabric, which is used in the conveyer belt to carry and convey materials. Meanwhile, the conveying belt is widely applied to occasions with short conveying distance and small conveying amount in the industries of cement, coking, metallurgy, chemical engineering, steel and the like.

The invention discloses a covering rubber for an impact-resistant tear-resistant steel wire rope core conveying belt in a Chinese patent with the publication number of CN105330906A, which comprises the following components in parts by weight: 45-60 parts of smoked sheet rubber, 20-30 parts of butadiene rubber, 15-20 parts of high impact polystyrene, 1.5-3 parts of sulfur, 15-20 parts of an active agent, 3.5-5 parts of an accelerator, 10-15 parts of amorphous silicon dioxide, 5-8 parts of polyurethane resin, 45-60 parts of medium super wear-resistant carbon black N22045, 2.5-3 parts of an anti-aging agent, 3-4 parts of microcrystalline wax, 2-5 parts of carbon five petroleum resin and 10-15 parts of a rubber anti-tearing agent.

In the patent, high-resistance polystyrene is adopted, and compounding agents such as amorphous silicon dioxide are used in combination, so that the impact resistance and tear resistance of the covering adhesive are improved; in addition, by studying the influence of the mixing initial temperature, the rubber discharge temperature and the rotor speed of the internal mixer on the dispersibility of the filler in the covering rubber, the comprehensive mechanical properties of the covering rubber, such as tensile strength, stress at definite elongation, tear strength, impact strength and the like, are further improved, but the covering rubber has poor corrosion resistance at high temperature, so that when a conveying belt is subjected to a large force, cracks are easily generated on the surface, and the whole application effect is poor, therefore, a new scheme needs to be provided to solve the problems.

Disclosure of Invention

In view of the problems in the prior art, an object of the present invention is to provide a high-temperature corrosion-resistant conveyor belt, which has good corrosion resistance at high temperature, is not easy to crack when subjected to a large force, and has good stability as a whole, so as to solve the above technical problems.

In order to achieve the first purpose, the invention provides the following technical scheme:

a high-temperature corrosion-resistant conveying belt comprises the following components in parts by weight:

30-50 parts of polyvinyl chloride;

20-40 parts of nitrile rubber;

10-18 parts of a thermoplastic polyurethane elastomer;

6-8 parts of PU glue;

40-50 parts of skeleton fabric;

8-16 parts of dioctyl phthalate;

4-8 parts of zinc borate;

2-3 parts of paraffin oil;

1-1.5 parts of sulfur;

0.5-0.7 part of sodium dithiocarbamate;

3-5 parts of aluminum silicate;

7-13 parts of blast furnace slag micro powder;

12-16 parts of reinforcing filler;

4-6 parts of a stabilizer.

By adopting the technical scheme, the nitrile rubber has the advantages of excellent oil resistance, higher wear resistance, better heat resistance and strong bonding force; the thermoplastic polyurethane elastomer has the advantages of high hardness, good strength, high elasticity, high wear resistance, tear resistance, aging resistance, ozone resistance, radiation resistance, good conductivity and the like; the nitrile rubber, the thermoplastic polyurethane elastomer and the polyvinyl chloride are mixed to form a stable mixed base material with good compatibility. Dioctyl phthalate is a good plasticizer, zinc borate and paraffin oil can respectively play a good flame retardant role and an anti-aging role, the stability of the overall quality of the high-temperature corrosion-resistant conveyer belt can be guaranteed, and sodium dithiocarbamate is a vulcanization accelerator and can act together with sulfur, so that the high-temperature corrosion-resistant conveyer belt has high quality.

The aluminum silicate has good thermal stability, chemical stability and fireproof performance, is a good filling agent, has good compatibility with other component raw materials, and has a superfine grid structure, so that the conveying belt can keep good structural stability under a high-temperature condition, and cracks are not easy to generate when a large external force is applied. The blast furnace slag micro powder has good high temperature resistance and corrosion resistance, can improve the overall structural strength of the conveying belt, can improve the binding force among raw materials of each component of the conveying belt, can effectively utilize industrial waste resources, and is beneficial to realizing green environmental protection. Meanwhile, the blast furnace slag micro powder and the aluminum silicate can play a good role in compounding and synergism, so that the corrosion resistance of the high-temperature corrosion-resistant conveyer belt at high temperature can be greatly improved, cracks are not easy to generate under the action of a large force, and the whole conveyer belt has good stability.

More preferably, 4-9 parts by weight of functional additives are added into the components of the high-temperature corrosion-resistant conveying belt, and the functional additives are spun-silk powder and Fe₃A mixture of Al intermetallic compounds, and sericite powder and Fe₃The weight part ratio of the Al intermetallic compound is (3-5) to 1.

By adopting the technical scheme, the spun silk powder has good acid-base resistance and oil resistance, the tearing strength of the high-temperature corrosion-resistant conveying belt can be improved, and Fe₃The Al intermetallic compound can form a layer of compact aluminum oxide protective film on the surface of the high-temperature corrosion-resistant conveyer belt at high temperature, and can form a mutually-penetrated multistage reinforcing network on the surface and inside of the high-temperature corrosion-resistant conveyer belt under the synergistic action of the sericin powder, so that the corrosion resistance of the high-temperature corrosion-resistant conveyer belt at high temperature is greatly improved, cracks are not easily generated under the action of larger force, and the whole high-temperature corrosion-resistant conveyer belt has good stability.

More preferably, 6-14 parts by weight of mineral wool fiber is also added into the components of the high-temperature corrosion-resistant conveying belt.

Through adopting above-mentioned technical scheme, the mineral wool fibre has good thermal stability, and acid and alkali corrosion resistance is good, and when it received high temperature influence, its surface can form the high silicon layer that has adsorption efficiency, can firmly adsorb each component raw materials, and then makes high temperature corrosion resistant type conveyer belt when receiving great external force, and its surface also is difficult for producing the crack, and overall stability improves greatly.

Further preferably, the framework fabric is any one of polyester fabric, polyester-cotton fabric, aramid fabric and acrylic fabric.

By adopting the technical scheme, the polyester fabric has good storage property and corrosion resistance, and is solid and durable; the polyester-cotton fabric is woven by polyester staple fiber and cotton fiber blended yarns, and has good wear resistance; the aramid fiber fabric has excellent flame retardant property and good overall thermal stability; the acrylic fabric has good heat resistance and good dimensional stability. Therefore, any one of polyester fabric, polyester-cotton fabric, aramid fabric and acrylic fabric is selected as the framework fabric, and the high-temperature corrosion-resistant conveying belt with good and stable quality can be obtained.

More preferably, the reinforcing filler is selected from one or more of boron nitride, corundum powder, expanded perlite and silicon dioxide.

By adopting the technical scheme, the boron nitride, the corundum powder, the expanded perlite and the silicon dioxide are all good wear-resistant fillers, and the components and the raw materials have good dispersibility and filling property, so that the high-temperature corrosion-resistant conveying belt can keep good structural stability, can exert stable high-temperature corrosion resistance in the using process, and is not easy to generate cracks.

More preferably, the stabilizer is any one of magnesium stearate, alkyl vinyl ester, phenyl ortho-hydroxybenzoate and polyethylene wax.

By adopting the technical scheme, the stabilizer has good associativity with the raw materials of the components, can slow down reaction, keep chemical balance, reduce surface tension, prevent light, thermal decomposition or oxidative decomposition, and further enable the high-temperature corrosion-resistant conveyor belt to integrally keep higher quality.

The second purpose of the invention is to provide a preparation method of the high-temperature corrosion-resistant conveyer belt, the high-temperature corrosion-resistant conveyer belt prepared by the method has good corrosion resistance at high temperature, is not easy to generate cracks under the action of large force, and has good stability as a whole.

In order to achieve the second purpose, the invention provides the following technical scheme, which comprises the following steps:

step one, drying the fabric: drying the skeleton fabric in corresponding parts by weight, and placing for later use;

step two, brushing glue and curing: then uniformly blade-coating PU glue in corresponding weight parts on the front and back surfaces of the framework fabric to form an adhesive layer;

step three, melt extrusion: fully stirring and mixing polyvinyl chloride, nitrile rubber, a thermoplastic polyurethane elastomer, dioctyl phthalate, zinc borate, paraffin oil, sulfur, sodium dithiocarbamate, aluminum silicate, blast furnace slag micro powder, a reinforcing filler and a stabilizer in corresponding parts by weight, and then melting and extruding to obtain a rubber layer;

step four, laminating and hot pressing: and (3) attaching the rubber layer to one side of the adhesive layer, which is far away from the framework fabric, performing hot-pressing attachment, and cooling to obtain the high-temperature corrosion-resistant conveying belt.

By adopting the technical scheme, the preparation method is simple to operate, high in production efficiency, free of great pollution to the environment and good in applicability in the actual use process.

Further preferably, the preparation method of the high-temperature corrosion-resistant conveying belt specifically comprises the following steps:

step one, drying the fabric: drying the skeleton fabric in the corresponding weight part at the drying temperature of 150 ℃ and 170 ℃ for 5-10min, and standing for later use;

step two, brushing glue and curing: then uniformly blade-coating PU glue in corresponding weight parts on the front side and the back side of the framework fabric, and brushing at the temperature of 150 ℃ and 170 ℃ to form an adhesive layer;

step three, melt extrusion: fully stirring and mixing polyvinyl chloride, nitrile rubber, a thermoplastic polyurethane elastomer, dioctyl phthalate, zinc borate, paraffin oil, sulfur, sodium dithiocarbamate, aluminum silicate, blast furnace slag micro powder, a reinforcing filler and a stabilizer in corresponding parts by weight, wherein the stirring speed is 1500-2500rpm, the stirring time is 10-20min, the melt extrusion is carried out, the melt extrusion temperature is 165-175 ℃, and the screw extrusion rotation speed is 25-35rpm, so as to obtain a rubber layer;

step four, laminating and hot pressing: and (3) attaching the rubber layer to one side of the adhesive layer, which is far away from the framework fabric, performing hot-pressing attachment, wherein the hot-pressing temperature is 80-90 ℃, the hot-pressing time is 3-5min, and the pressure is 20-30MPa, and cooling to obtain the high-temperature corrosion-resistant conveying belt.

By adopting the technical scheme, the temperature-resistant variable conveyer belt with good quality can be prepared by selecting the parameter control in each operation process.

In summary, compared with the prior art, the invention has the following beneficial effects:

(1) the aluminum silicate and the blast furnace slag micro powder have good high temperature resistance and corrosion resistance, have good compatibility with other raw materials, can play a good role in compounding and synergism, can greatly improve the corrosion resistance of the high-temperature corrosion-resistant conveyer belt at high temperature, and are not easy to crack when being subjected to a large force, so that the whole body has good stability;

(2) adding the mixture of the sericite powder and the Fe₃The functional assistant consisting of the Al intermetallic compound can form a multi-stage reinforcing network which is mutually penetrated on the surface and the inside of the high-temperature corrosion-resistant conveyer belt, so that the corrosion resistance of the high-temperature corrosion-resistant conveyer belt at high temperature is greatly improved, cracks are not easy to generate under the action of a large force, and the whole body has good stability;

(3) mineral wool fibers are added, when the mineral wool fibers are influenced by high temperature, a high silicon layer with adsorption capacity can be formed on the surface of the mineral wool fibers, raw materials of all components can be firmly adsorbed, and further, when the high-temperature corrosion-resistant conveying belt is subjected to large external force, cracks are not easily generated on the surface of the high-temperature corrosion-resistant conveying belt, and the overall stability is greatly improved.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The invention is described in detail below with reference to the figures and examples.