阅读说明：本技术 抗切割输送带覆盖胶及其制备方法 (Cutting-resistant conveyor belt covering rubber and preparation method thereof ) 是由 孙万 屈文德 孙业斌 范旭梦 曲成东 顾欣坚 杨可 苏鲲鹏 刘婷 曹晖 叶聪 于 2020-12-29 设计创作，主要内容包括：本发明涉及一种抗切割输送带覆盖胶,其配方比例按重量份计为：丁苯橡胶40-80份、天然橡胶材料20-60份、高苯乙烯橡胶10-20份、改性碳化硅微粉1-5份、耐切割树脂1-5份、补强填料50-80份、纳米氧化锌3-6份、硬脂酸1-3份、硅烷偶联剂4-8份、软化增塑剂5-25份、防老剂3-8份、硫磺0.5-2份和促进剂0.5-2份,上述组分经过塑炼、一段混炼和二段混炼得到抗切割输送带覆盖胶成品。本发明采用湿法混炼天然橡胶、高苯乙烯橡胶、改性碳化硅微粉、抗切割树脂,结合使用补强剂等配合剂,提升覆盖胶抗切割性能,有效延长了输送带在冲击切割工况下的使用寿命。(The invention relates to an anti-cutting conveyer belt covering rubber which comprises the following components in parts by weight: 40-80 parts of styrene butadiene rubber, 20-60 parts of natural rubber material, 10-20 parts of high styrene rubber, 1-5 parts of modified silicon carbide micro powder, 1-5 parts of cutting-resistant resin, 50-80 parts of reinforcing filler, 3-6 parts of nano zinc oxide, 1-3 parts of stearic acid, 4-8 parts of silane coupling agent, 5-25 parts of softening plasticizer, 3-8 parts of anti-aging agent, 0.5-2 parts of sulfur and 0.5-2 parts of accelerator, and the components are subjected to plastication, first-stage mixing and second-stage mixing to obtain a finished product of the cutting-resistant conveyer belt covering rubber. According to the invention, the natural rubber, the high styrene rubber, the modified silicon carbide micro powder and the cutting-resistant resin are mixed by a wet method, and the compounding agents such as the reinforcing agent are used in combination, so that the cutting-resistant performance of the covering rubber is improved, and the service life of the conveyer belt under the impact cutting working condition is effectively prolonged.)

1. The cutting-resistant conveyor belt covering rubber is characterized by comprising the following components in parts by weight:

40-80 parts of styrene butadiene rubber, 20-60 parts of natural rubber material, 10-20 parts of high styrene rubber, 1-5 parts of modified silicon carbide micro powder, 1-5 parts of cutting-resistant resin, 50-80 parts of reinforcing filler, 3-6 parts of nano zinc oxide, 1-3 parts of stearic acid, 4-8 parts of silane coupling agent, 5-25 parts of softening plasticizer, 3-8 parts of anti-aging agent, 0.5-2 parts of sulfur and 0.5-2 parts of accelerator, and the components are subjected to plastication, first-stage mixing and second-stage mixing to obtain a finished product of the cutting-resistant conveyer belt covering rubber.

2. The cut-resistant conveyor belt cover compound of claim 1, wherein: the styrene-butadiene rubber is solution-polymerized styrene-butadiene rubber, emulsion-polymerized styrene-butadiene rubber, oil-extended styrene-butadiene rubber or wet-mixed styrene-butadiene rubber.

3. The cut-resistant conveyor belt cover compound of claim 1, wherein: the natural rubber material is natural rubber or wet mixed rubber of the natural rubber and white carbon black, wherein the filling amount of the white carbon black is 10-50 parts.

4. The cut-resistant conveyor belt cover compound of claim 1, wherein: the high styrene rubber is one or more of styrene butadiene rubbers with the combined styrene content of 55wt% -95 wt%.

5. The cut-resistant conveyor belt cover compound of claim 1, wherein: the particle size of the modified silicon carbide micro powder is 1-10 microns.

6. The cut-resistant conveyor belt cover compound of claim 1, wherein: the cutting-resistant resin is one or more of dicyclopentadiene type phenolic resin KPE-F6095, dicyclopentadiene type phenolic resin KPE-F6115 or dicyclopentadiene type phenolic resin KPE-F6135.

7. The cut-resistant conveyor belt cover compound of claim 1, wherein: the reinforcing filler is one or more of white carbon black, carbon black N330, carbon black N220, carbon black N234 or carbon black N115.

8. The cut-resistant conveyor belt cover compound of claim 1, wherein: the silane coupling agent is one or more of bis (gamma-triethoxysilylpropyl) -tetrasulfide SI69, gamma-mercaptopropyltriethoxysilane KH580 and N-beta- (aminoethyl) -gamma aminopropyltrimethoxysilane KH 792.

9. The cut-resistant conveyor belt cover compound of claim 1, wherein: the softening plasticizer is one or more of aromatic oil, coumarone resin or C5 resin.

10. The cut-resistant conveyor belt cover compound of claim 1, wherein: the anti-aging agent is one or more of anti-aging agent RD, anti-aging agent 4020 or anti-aging agent microcrystalline wax.

11. The cut-resistant conveyor belt cover compound of claim 1, wherein: the accelerant is one or more of accelerant CZ, accelerant NS or accelerant DTDM.

12. The preparation method of the cutting-resistant conveyer belt covering rubber as claimed in claim 1, which is characterized by comprising the following steps in parts by weight:

(1) plasticating: 40-80 parts of styrene butadiene rubber, 20-60 parts of natural rubber material and 10-20 parts of high styrene rubber are mixed in an internal mixer for 1-3min to obtain a mixing master batch;

(2) first-stage mixing: putting the plasticated rubber obtained in the step (1) into an internal mixer, sequentially putting 3-6 parts of nano zinc oxide, 1-3 parts of stearic acid, 1-5 parts of modified silicon carbide micro powder, 1-5 parts of cutting-resistant resin, 50-80 parts of reinforcing filler, 4-8 parts of silane coupling agent, 5-25 parts of softening plasticizer, 3-8 parts of anti-aging agent, and carrying out internal mixing for 3-5min, controlling the discharging temperature at 130 ℃ and 150 ℃, turning over for five times to obtain a section of mixed rubber, cooling the rubber, and standing for later use after 8 hours;

(3) and (3) second-stage mixing: and (3) putting the first-stage rubber compound prepared in the step (2) into an internal mixer, then putting 0.5-2 parts of accelerator and 0.5-2 parts of sulfur, carrying out internal mixing for 1-2min, controlling the discharge temperature at 80-90 ℃, discharging rubber materials, carrying out turnover mixing for 5-10min, discharging pieces with the thickness of 8-12mm, and cooling by a normal-temperature fan to obtain the product of the anti-cutting conveyer belt covering rubber.

Technical Field

The invention belongs to the technical field of rubber conveying belts for industrial conveying, and particularly relates to cutting-resistant conveying belt covering rubber and a preparation method thereof.

Background

The rubber conveyer belt has the advantages of simple structure, long single-line distance, large transportation amount, low maintenance cost and the like, and is widely applied to the industrial conveying fields of mining, cement, metallurgy, chemical industry and the like. With the development of industrial technology and industrial transportation markets at home and abroad, more requirements are put forward on conveyor belt products, such as long service life, low maintenance cost, energy conservation, consumption reduction and the like. In some industries such as mines, metallurgy and the like, conveying belt products of large sharp ores are transported, the main damage modes are impact and cutting damage, and the service life is only 15-30 days under severe working conditions. The market for cut resistant conveyor belt products is growing for similar conditions. The conveyer belt product on the existing market to wear-resisting product is many, and how to continuously promote the anti-cutting characteristic of conveyer belt product to cutting resistance performance does not have corresponding test standard temporarily in the trade is a technical research direction of rubber conveyer belt product.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the conveyor belt covering rubber with excellent cutting resistance and the preparation method thereof.

According to the technical scheme provided by the invention, the cutting-resistant conveyor belt covering rubber is characterized by comprising the following components in parts by weight:

40-80 parts of styrene butadiene rubber, 20-60 parts of natural rubber material, 10-20 parts of high styrene rubber, 1-5 parts of modified silicon carbide micro powder, 1-5 parts of cutting-resistant resin, 50-80 parts of reinforcing filler, 3-6 parts of nano zinc oxide, 1-3 parts of stearic acid, 4-8 parts of silane coupling agent, 5-25 parts of softening plasticizer, 3-8 parts of anti-aging agent, 0.5-2 parts of sulfur and 0.5-2 parts of accelerator;

preferably, the styrene-butadiene rubber is solution-polymerized styrene-butadiene rubber, emulsion-polymerized styrene-butadiene rubber, oil-extended styrene-butadiene rubber or wet-mixed styrene-butadiene rubber.

Preferably, the natural rubber material is natural rubber or a wet-process mixed rubber of the natural rubber and white carbon black, wherein the filling amount of the white carbon black is 10-50 parts.

Preferably, the high styrene rubber is one or more of styrene butadiene rubbers with the bound styrene content of 55wt% -95 wt%.

Preferably, the particle size of the modified silicon carbide micro powder is 1-10 microns.

Preferably, the cutting-resistant resin is one or more of dicyclopentadiene type phenolic resin KPE-F6095, dicyclopentadiene type phenolic resin KPE-F6115 or dicyclopentadiene type phenolic resin KPE-F6135.

Preferably, the reinforcing filler is one or more of white carbon black, carbon black N330, carbon black N220, carbon black N234 or carbon black N115.

Preferably, the silane coupling agent is one or more of bis (gamma-triethoxysilylpropyl) -tetrasulfide SI69, gamma-mercaptopropyltriethoxysilane KH580 and N-beta- (aminoethyl) -gamma aminopropyltrimethoxysilane KH 792.

Preferably, the softening plasticizer is one or more of aromatic oil, coumarone resin or C5 resin.

Preferably, the anti-aging agent is one or more of anti-aging agent RD, anti-aging agent 4020 or anti-aging agent microcrystalline wax.

Preferably, the promoter is one or more of promoter CZ, promoter NS or promoter DTDM.

The preparation method of the cutting-resistant conveyer belt covering rubber is characterized by comprising the following steps in parts by weight:

(1) plasticating: 40-80 parts of styrene butadiene rubber, 20-60 parts of natural rubber material and 10-20 parts of high styrene rubber are mixed in an internal mixer for 1-3min to obtain a mixing master batch;

(2) first-stage mixing: putting the plasticated rubber obtained in the step (1) into an internal mixer, sequentially putting 3-6 parts of nano zinc oxide, 1-3 parts of stearic acid, 1-5 parts of modified silicon carbide micro powder, 1-5 parts of cutting-resistant resin, 50-80 parts of reinforcing filler, 4-8 parts of silane coupling agent, 5-25 parts of softening plasticizer, 3-8 parts of anti-aging agent, and carrying out internal mixing for 3-5min, controlling the discharging temperature at 130 ℃ and 150 ℃, turning over for five times to obtain a section of mixed rubber, cooling the rubber, and standing for later use after 8 hours;

(3) and (3) second-stage mixing: and (3) putting the first-stage rubber compound prepared in the step (2) into an internal mixer, then putting 0.5-2 parts of accelerator and 0.5-2 parts of sulfur, carrying out internal mixing for 1-2min, controlling the discharge temperature at 80-90 ℃, discharging rubber materials, carrying out turnover mixing for 5-10min, discharging pieces with the thickness of 8-12mm, and cooling by a normal-temperature fan to obtain the product of the anti-cutting conveyer belt covering rubber.

According to the invention, the natural rubber, the high styrene rubber, the modified silicon carbide micro powder and the cutting-resistant resin are mixed by a wet method, and the compounding agents such as the reinforcing agent are used in combination, so that the cutting-resistant performance of the covering rubber is improved, and the service life of the conveyer belt under the impact cutting working condition is effectively prolonged.

Detailed Description

The present invention will be further described with reference to the following specific examples.

Example 1

A preparation method of cutting-resistant conveyor belt covering rubber comprises the following steps in parts by weight:

(1) plasticating: plasticating 80 parts of styrene-butadiene rubber, 20 parts of natural rubber and 10 parts of high styrene rubber (the combined styrene content is 95 wt%) on an open mill, setting the roll gap to be 2mm and the roll temperature to be 45 ℃, and plasticating for 10min to obtain plasticated rubber;

(2) first-stage mixing: putting the plasticated rubber prepared in the step (1) into an internal mixer, and carrying out internal mixing for 1 min; then lifting a top plug, adding 3 parts of nano zinc oxide, 1 part of stearic acid, 5 parts of 10-micron modified silicon carbide micro powder, 1 part of KPE-F6095 cutting-resistant resin, 1 part of bis (gamma-triethoxysilylpropyl) -tetrasulfide SI 694, 1 part of antioxidant RD, 40201 parts of antioxidant, 1 part of microcrystalline wax, 33025 parts of carbon black N, 25 parts of white carbon black and 5 parts of aromatic oil, banburying for 5min, controlling the rubber discharge temperature at 130 ℃, discharging the rubber sheet after 5min of roll refining according to the thickness of 8mm, cooling by a normal temperature fan to prepare a section of rubber compound, and standing for 8 h;

(3) and (3) second-stage mixing: and (3) putting the first-stage rubber compound prepared in the step (2), 0.5 part of sulfur, 1.5 parts of an accelerator NS and 0.5 part of an accelerator DTDM into an internal mixer, mixing for 3min, controlling the rubber discharge temperature at 80 ℃, discharging pieces with the thickness of 8mm after turning over for 5min, and cooling by a normal-temperature fan to obtain the product, namely the anti-cutting conveyer belt covering rubber.

The cutting-resistant conveyor belt covering rubber obtained in example 1 was vulcanized on a vulcanizing press at a vulcanization temperature of 150 ℃ and a vulcanization unit pressure of 3 MPa. The physical and mechanical properties of the cover slips are shown in Table 1.

Example 2

A preparation method of cutting-resistant conveyor belt covering rubber comprises the following steps in parts by weight:

(1) plasticating: 60 parts of styrene-butadiene rubber, 40 parts of wet-process mixed natural rubber (the white carbon black filling amount is 50phr), and 15 parts of high styrene rubber (the combined styrene content is 80 wt%) are plasticated on an open mill, the roll spacing is 2mm, the roll temperature is 50 ℃, and plastication is carried out for 12min to obtain plasticated rubber;

(2) first-stage mixing: putting the plasticated rubber prepared in the step (1) into an internal mixer, and carrying out internal mixing for 1 min; lifting a top plug, adding 5 parts of nano zinc oxide, 2 parts of stearic acid, 3 parts of 5-micron modified silicon carbide micro powder, 3 parts of KPE-F6115 cutting-resistant resin, KH 7926 parts of N-beta- (aminoethyl) -gamma aminopropyltrimethoxysilane, 2 parts of an anti-aging agent RD, 40202 parts of the anti-aging agent, 2 parts of microcrystalline wax, 20 parts of carbon black N33020, 20 parts of white carbon black, 40 parts of carbon black N22040, 15 parts of aromatic oil, 5 parts of coumarone resin and 5 parts of C5 resin, banburying for 3min, controlling the rubber discharge temperature at 145 ℃, turning, discharging sheets with the thickness of 10mm, cooling by a normal-temperature fan to obtain a first-stage rubber compound, and standing for 6 hours;

(3) and (3) second-stage mixing: and (3) putting the first-stage rubber compound prepared in the step (2), 1 part of sulfur, 0.8 part of accelerator NS and 0.6 part of accelerator DTDM into an internal mixer, mixing for 4min, controlling the rubber discharge temperature at 90 ℃, discharging the rubber sheet with the thickness of 10mm after turning over for 6min, and cooling by a normal-temperature fan to obtain the product, namely the anti-cutting conveyer belt cover rubber.

The cutting-resistant conveyor belt covering rubber obtained in example 2 was vulcanized on a flat vulcanizing machine at a vulcanization temperature of 150 ℃ and a vulcanization unit pressure of 3 MPa. The physical and mechanical properties of the cover slips are shown in Table 1.

Example 3

A preparation method of cutting-resistant conveyor belt covering rubber comprises the following steps in parts by weight:

(1) plasticating: 40 parts of styrene-butadiene rubber, 60 parts of wet-process mixed natural rubber (the white carbon black filling amount is 30phr), and 20 parts of high styrene rubber (the combined styrene content is 55 wt%) are plasticated on an open mill, the roll spacing is 2mm, the roll temperature is 60 ℃, and plastication is carried out for 10min to obtain plasticated rubber;

(2) first-stage mixing: putting the plasticated rubber prepared in the step (1) into an internal mixer, and carrying out internal mixing for 1 min; lifting a top plug, adding 6 parts of nano zinc oxide, 3 parts of stearic acid, 5 parts of 1 micron modified silicon carbide micro powder, 5 parts of KPE-F6135 cutting-resistant resin, 5 parts of gamma-mercaptopropyltriethoxysilane KH 5808, 2 parts of an anti-aging agent BLE, 40203 parts of an anti-aging agent, 3 parts of microcrystalline wax, 3 parts of carbon black N23420 parts, 40 parts of white carbon black, 5 parts of coumarone, 10 parts of aromatic oil, 5 parts of coumarone resin and 5 parts of C5 resin, banburying for 4min, controlling the rubber discharge temperature at 150 ℃, discharging pieces with the thickness of 12mm after turning for 7min, cooling by a normal temperature fan to prepare a rubber compound, and standing for 10 h;

(3) and (3) second-stage mixing: and (3) putting the first-stage rubber compound prepared in the step (2), 2 parts of sulfur and 0.5 part of accelerator NS into an internal mixer, mixing for 4min, controlling the rubber discharge temperature at 85 ℃, discharging pieces with the thickness of 12mm after turning over for 7min, and cooling by a normal-temperature fan to obtain the product, namely the anti-cutting conveyer belt cover rubber.

The cutting-resistant conveyor belt covering rubber obtained in example 3 was vulcanized on a vulcanizing press at a vulcanization temperature of 150 ℃ and a vulcanization unit pressure of 3 MPa. The physical and mechanical properties of the cover slips are shown in Table 1.

Example 4

A preparation method of cutting-resistant conveyor belt covering rubber comprises the following steps in parts by weight:

(1) plasticating: 50 parts of styrene-butadiene rubber, 50 parts of wet-process mixed natural rubber (the white carbon black filling amount is 10phr) and 10 parts of high styrene rubber (the combined styrene content is 85 wt%) are plasticated on an open mill, the roll spacing is 2mm, the roll temperature is 40 ℃, and plastication is carried out for 12min to obtain plasticated rubber;

(2) first-stage mixing: putting the plasticated rubber prepared in the step (1) into an internal mixer, and carrying out internal mixing for 1 min; lifting a top plug, adding 4 parts of nano zinc oxide, 2 parts of stearic acid, 2 parts of 4-micron modified silicon carbide micro powder, 1 part of KPE-F6135 cutting-resistant resin, 2 parts of KPE-F6095 cutting-resistant resin, 5802 parts of gamma-mercaptopropyltriethoxysilane KH, 4 parts of SI-69 silane coupling agent, 2 parts of antioxidant RD, 40202 parts of antioxidant, 2 parts of microcrystalline wax, N11520 parts of carbon black, 35 parts of white carbon black, 8 parts of aromatic oil and 8 parts of C5 resin, banburying for 5min, controlling the rubber discharge temperature at 140 ℃, discharging chips with the thickness of 12mm after 7min of roll refining, cooling by a normal-temperature fan to prepare a rubber compound, and standing for 10 h;

(3) and (3) second-stage mixing: and (3) putting the first-stage rubber compound prepared in the step (2), 0.8 part of sulfur, 1 part of an accelerator NS and 0.5 part of an accelerator DTDM into an internal mixer, mixing for 4min, controlling the rubber discharge temperature at 90 ℃, discharging pieces with the thickness of 12mm after 8min of roll-over mixing, and cooling by a normal-temperature fan to obtain the product, namely the anti-cutting conveyer belt cover rubber.

The cutting-resistant conveyor belt covering rubber obtained in example 4 was vulcanized on a vulcanizing press at a vulcanization temperature of 150 ℃ and a vulcanization unit pressure of 3 MPa. The physical and mechanical properties of the cover slips are shown in Table 1.

Comparative example

A preparation method of cutting-resistant conveyor belt covering rubber comprises the following steps in parts by weight:

(1) plasticating: 30 parts of styrene-butadiene rubber and 70 parts of natural rubber are plasticated on an open mill or are plasticated at the roll spacing of 2mm and the roll temperature of 45 ℃ for 20min to obtain plasticated rubber;

(2) first-stage mixing: putting the plasticated rubber prepared in the step (1) into an internal mixer, and carrying out internal mixing for 2 min; lifting the top plug, adding 5 parts of nano zinc oxide, 1 part of stearic acid, 1 part of antioxidant RD, 40202 parts of antioxidant, 2 parts of microcrystalline wax, N11535 parts of carbon black, N22015 parts of carbon black and 5 parts of aromatic oil, banburying for 5min, controlling the rubber discharge temperature at 145 ℃, turning, discharging sheets with the thickness of 8mm, cooling by a normal-temperature fan to obtain a rubber compound, and standing for 8 hours;

(3) and (3) second-stage mixing: and putting the prepared first-stage rubber compound, 1.5 parts of sulfur, 1.2 parts of accelerator NS and 0.1 part of accelerator TMTD into an internal mixer, mixing for 3min, controlling the rubber discharge temperature at 100 ℃, turning for 5min, discharging the rubber sheet with the thickness of 8mm, and cooling by a normal-temperature fan to obtain the conveyor belt covering rubber.

And vulcanizing the anti-cutting conveyer belt covering rubber obtained in the comparative example on a flat vulcanizing machine, wherein the vulcanizing temperature is 150 ℃, and the vulcanizing pressure is 10 MPa. The physical and mechanical properties of the cover slips are shown in Table 1.

Table 1 shows the physical and mechanical properties of the vulcanizates of examples 1-4 and comparative examples.

And (3) testing conditions are as follows: the striking frequency of 120 times/min and the rotation frequency of 720r/min are 20min

Testing equipment: RCC-I rubber dynamic cutting tester (Beijing Wanhui scientific and technological development Co., Ltd.) Table 1 physical and mechanical properties of vulcanized rubbers of examples and comparative examples

Item	Example 1	Example 2	Example 3	Example 4	Comparative example
						Cutting/mm3	920	954	1009	1050	2530

As can be seen from table 1, the volume cutting amount in the embodiment of the cutting-resistant conveyor belt cover rubber of the present invention is smaller than the volume cutting amount in the embodiment of the invention, which indicates that the cutting-resistant performance of the conveyor belt cover rubber is better.