CN109723758B - High-performance V-belt and preparation method thereof - Google Patents

Abstract

The invention discloses a high-performance V-belt. The V-belt comprises a strength layer, an upper part of the strength layer is provided with a stretch layer, a lower part of the strength layer is provided with a compression layer, and the outer side of the stretch layer and the compression layer is wrapped with a cloth layer; The strength layer is surface-modified tempered brown wire. The invention adopts tempered brown wire as the material of the strength layer, improves the tensile stress and other stress generated by the V-belt during the operation, optimizes the formulation of the primer material, improves the physical and mechanical properties, bending resistance and fatigue resistance of the material, and optimizes and strictly controls Apex production process, improve the process efficiency of materials, and then ensure the quality and quality of products.

Description

A kind of high-performance V-belt and preparation method thereof

technical field

The invention relates to the technical field of V-belts, in particular to a high-performance V-belt and a preparation method thereof.

Background technique

There are two kinds of V-belts with special belt core structure and rope core structure, which are composed of four parts: covering cloth, top rubber, tensile body and bottom rubber. The V-belt with a special core structure has good toughness and high strength, and is suitable for occasions with high rotation speed. The V-belt made of rubber is generally composed of a cloth covering layer, a tensile layer (top rubber), a strong layer (tensile layer) and a compression layer. layer (primer) and other parts.

The cloth covering layer is composed of plain rubber canvas (mainly cotton canvas and polyester-cotton canvas) which is obliquely cut into 45°. Abrasion, erosion, and can increase the stiffness of the V-belt; the stretch rubber layer is composed of rubber with high elasticity and excellent tensile properties, which can withstand the tension of the V-belt when it is running and bending. Tensile stress, and play a buffering protection role for the strength layer; the strength layer is the skeleton of the V-belt, the main types are polyester cord, polyester tempered brown silk, aramid cord and dipped cord fabric, etc., the function is to withstand The tension and other stress generated by the V-belt during the operation process are the main force-bearing parts of the V-belt transmission process; the buffer glue is a polyester tempered brown ribbon core or a V-belt with a cord core around the strength layer. There is a layer of rubber with good adhesion strength to the belt core, that is, the buffer rubber, which plays the role of fixing the belt core and can absorb the dynamic shear stress generated by the frequent deformation of the V-belt during high-speed operation; the compression rubber layer is It is composed of rubber with excellent resistance to bending fatigue, which can withstand the compressive stress generated by the V-belt during operation and bending, maintain the rigidity and elasticity of the V-belt, and increase the cross-section of the V-belt and the frictional contact surface with the pulley. The role of transmission efficiency.

Based on this, the strength layer and primer play a vital role in the performance of the V-belt. The existing Chinese patent document (publication number: CN108189497A) discloses a high-strength V-belt, including a body, and the body is from top to bottom. A back glue, a buffer glue and a base glue are arranged in sequence, the buffer glue is provided with a cord, the outer surface of the main body is provided with a canvas, and the canvas is respectively connected with the base glue, the buffer glue and the back glue through the adhesive layer. The wire rope adopts tempered brown wire, and the manufacturing process of the present invention includes the steps of raw material pretreatment, canvas treatment, wire rope treatment, cloth wrapping treatment, vulcanization treatment and quality inspection; the V-belt wire rope adopts tempered brown wire, and the surface of the tempered brown wire is The energy is low, it is difficult to bond with the rubber, and then the bonding strength of the cord is affected, so that the overall performance of the V-belt becomes poor; Chinese Patent Literature (Publication No.: CN103966853A) discloses a polyester tempered brown wire bonding activation The technical scheme is: take glycerol glycidyl ether type epoxy resin, closed type blocked isocyanate and epoxy resin dispersant, put them in a reaction kettle and stir to form polyester Tempered brown wire bonding activator. The polyester tempered brown silk is put into the adhesive activator and soaked in the silk to form an epoxy resin surface layer on the surface. After the polyester tempered brown silk is treated, the RFL (resorcinol, formaldehyde and latex condensate) adhesive used in the two-bath dipping system is used, and then the conventional RFL is used for two-bath dipping, which can greatly improve the Its adhesive force value, this document gives the improvement of the bonding strength between the rubber and the rope, the polyester tempered brown wire is essentially the bonding formed by the resin layer on the surface of the polyester tempered brown wire and the primer layer after treatment , the improvement of the adhesion effect is not very significant.

Chinese Patent Document (Publication No.: CN108189497A) discloses a rubber composition for manufacturing a compression layer of a cloth-covered V-belt and a preparation method thereof. The main components of the rubber composition include: natural rubber, styrene-butadiene rubber, Eucommia ulmoides Rubber, vulcanization activators, lubricants, antioxidants, carbon black, silica, clay, calcium carbonate, plasticizers, tackifiers, accelerators and vulcanizing agents, this document gives the formulation of compression layer materials, using raw materials More conventionally, the mechanical properties of the primer itself are limited, and at the same time, the adhesive strength between the primer and the cord is not very good, and then the performance of the prepared V-belt is not very good.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-performance V-belt and a preparation method thereof, so as to solve the problems raised in the above-mentioned background art.

To achieve the above object, the present invention provides the following technical solutions:

A high-performance V-belt, the V-belt comprises a strength layer, an upper part of the strength layer is provided with a stretch layer, a lower part of the strength layer is provided with a compression layer, and the outer sides of the stretch layer and the compression layer are wrapped with a cloth wrapping layer;

The strength layer is surface-modified tempered brown wire;

The stretch layer includes the following raw materials in parts by weight:

40-50 parts of neoprene rubber, 5-15 parts of natural rubber, 10-20 parts of polyurethane resin, 10-20 parts of talc, 4-10 parts of aromatic oil, and 3-9 parts of sodium tripolyphosphate.

As a further scheme of the present invention, the method for preparing the surface-modified tempered brown wire is to first place the tempered brown wire in a nitric acid solution and soak it for 1-2 hours, then take it out and rinse it with deionized water, then air-dry it, and then place it in a concentration of In 10% sodium hydroxide solution, the surface is oxidized by alternating current, and then placed in sodium hypochlorite with a concentration of 1.5-2.5mol/L for 20-30min, and then rinsed with deionized water for 2-3 times, and then with osmotic The agent is added into the high pressure reaction kettle according to the weight ratio of 1:3, the reaction pressure is 2-4MPa, the reaction temperature is 100-110℃, and the reaction time is 2-5h. Dry in a drying box for 2-3 hours.

As a further solution of the present invention, the surface oxidation time of the alternating current is 1-3h, the current density is 0.2-0.5A/dm ² , and the oxidation treatment temperature is 20-30°C.

As a further solution of the present invention, the surface oxidation time of the alternating current is 2h, the current density is 0.35A/dm ² , and the oxidation treatment temperature is 25°C.

As a further scheme of the present invention: the preparation method of the penetrant is to add ZnCl with a concentration of 0.5-1.5mol/L into the four _- neck reaction flask, then add glacial acetic acid to adjust the pH to 4.0-5.0, and then add 2 Add the quantum dot additive solution dropwise to the four-necked flask at a speed of -5ml/min, stir while adding dropwise, and finally add rare earth lanthanum chloride, and continue stirring for 10-20min.

As a further scheme of the present invention, the preparation method of the quantum dot additive solution is to add nano-diamonds into an acetone solution according to a weight ratio of 1:4, ultrasonically disperse them for 20-30 minutes, and then add 5-9% of the total amount of nano-diamonds. Silica microsphere emulsion, continue to stir for 20-30min.

As a further scheme of the present invention: the compression layer includes the following raw materials in parts by weight:

30-40 parts of natural rubber, 20-30 parts of styrene-butadiene rubber, 5-15 parts of recycled rubber, 4-8 parts of silica, 3-6 parts of cellulose nanowhisker, 5-10 parts of tin oxide, 5 parts of vulcanizing agent -9 parts, 2-6 parts of compatibilizer, 1-4 parts of modified alkali lignin.

As a further scheme of the present invention, the preparation method of the modified alkali lignin is to add the alkali lignin into a magnetic stirrer, then add it into deionized water containing silane, and increase the rotation speed to 200-400r/min , stir for 10-20min, the stirring temperature is 70-90 ℃, then add sepiolite powder with 10-20% total alkali lignin, stir for 20-30min, and finally add 2-8% methyl alkali lignin Acrylic glycidyl ether, continue to stir for 1-2h, the reaction is over, centrifuge, wash, and dry.

As a further scheme of the present invention, the vulcanizing agent is tetrabenzylthiuram disulfide; the compatibilizer is oxazoline type.

The present invention also provides a method for preparing a high-performance V-belt, comprising the following steps:

Step 1, masticate natural rubber, styrene-butadiene rubber and regenerated rubber for 80-100s, then add silica, cellulose nanowhisker, tin oxide, modified alkali lignin, vulcanizing agent, and compatibilizer to continue. Mixing for 100-200s, and then calendering to obtain a compressed layer;

In step 2, the chloroprene rubber and natural rubber are first masticated for 70-80s, and then polyurethane resin, talc, aromatic oil, and sodium tripolyphosphate are added to continue mixing for 100-200s to obtain a stretch layer rubber compound for use;

Step 3, heating the standby stretch layer sizing material in step 2 to melting, then pulling the surface-modified tempered brown wire from the molten stretch layer sizing material to wrap the surface-modified tempered brown filament in the stretching layer sizing material, The buffer cord is formed, which is then reeled by turning rollers to form a pre-applied layer;

Step 4: Adhere the compression layer obtained in step 1 to the lower part of the pre-applied layer to form a base layer, then wrap the base layer through a cloth wrapping layer to form a pre-used V-belt, put the pre-used V-belt into the mold and send it into the Vulcanization is carried out in a vulcanization tank, and then cutting and grinding are performed to obtain a finished product, which is then inspected, packaged and stored to obtain the high-performance V-belt of the present invention.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The present invention adopts tempered brown wire as the material of the strength layer, improves the stress such as the tensile force generated by the V-belt during the operation, optimizes the formula of the primer material, and improves the physical and mechanical properties of the material, as well as the resistance to bending and fatigue, Optimize and strictly control the apex production process, improve the process efficiency of materials, and then ensure the quality and quality of products.

(2) the tempered brown wire of the present invention is first placed in a nitric acid solution to play an activation effect, and the reaction energy is improved, and then the surface oxidation treatment is carried out under the alternating current condition, so that the surface microstructure of the tempered brown wire becomes loose, and then treated with sodium hypochlorite, the surface The fine lines and micropores are generated, and then mixed with the penetrant and added to the high pressure reaction kettle. The penetrant is easier to penetrate in the fine lines and micropores. The penetrant is composed of ZnCl ₂ and quantum dot additive solution, rare earth lanthanum chloride in glacial acetic acid. It is prepared under the condition of adjusting pH. The quantum dot additive solution and rare earth lanthanum chloride stimulate ZnCl ₂ to infiltrate to improve the infiltration efficiency. In the subsequent lamination process with the primer, the tempered brown wire undergoes high temperature treatment, and the surface organic compounds evaporate. The remaining micropores and loose structure are fused with the primer material, and form an integrated structure after cooling. At the same time, the cellulose nanowhiskers in the primer are shaped like corn silk and are interspersed in the pores of the tempered brown silk, which greatly improves the two. The bonding strength between the apex is significantly improved.

(3) In the preparation of the primer of the present invention, natural rubber, styrene-butadiene rubber, and regenerated rubber are used as base materials, and auxiliary materials are added to enhance the performance of the primer. The surface of the added cellulose nanowhiskers is rich in hydroxyl groups and has high modulus. , high aspect ratio, can combine the raw materials in the primer in an orderly manner, improve the tightness between the raw materials, and then improve the mechanical properties and bending fatigue resistance of the material. The elemental nanowhiskers play a synergistic role, orderly combined with the cellulose nanowhiskers, so that the matrix is covered by a network orderly, so that the structural system is integrated, and the primer structure is stronger, and the added alkali Conventionally, lignin plays a water-reducing effect in concrete. In the present invention, it is modified and applied to primer materials to form a crossed network structure with raw materials such as tin oxide, thereby enhancing the mechanical and other properties of the primer.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1:

A high-performance V-belt of this embodiment, the V-belt includes a strength layer, an upper portion of the strength layer is provided with a stretch layer, a lower portion of the strength layer is provided with a compression layer, and the outer side of the stretch layer and the compression layer is wrapped with a cloth layer;

The strength layer is surface-modified tempered brown wire;

The stretch layer includes the following raw materials in parts by weight:

40 parts of neoprene rubber, 5 parts of natural rubber, 10 parts of polyurethane resin, 10 parts of talc, 4 parts of aromatic oil, and 3 parts of sodium tripolyphosphate.

The preparation method of the surface-modified tempered brown wire in this embodiment is to first soak the tempered brown wire in a nitric acid solution for 1 hour, then take it out, rinse it with deionized water, air dry it, and then place it in a 10% sodium hydroxide solution , using alternating current to carry out surface oxidation treatment, and then placing it in a concentration of 1.5mol/L sodium hypochlorite for 20min, then using deionized water to rinse 2 times, and then adding the penetrant to the autoclave in a weight ratio of 1:3, The reaction pressure was 2MPa, the reaction temperature was 100°C, and the reaction time was 2h. After the reaction was completed, it was washed with water and dried in a constant temperature drying oven at 40°C for 2h.

In this embodiment, the time for surface oxidation by alternating current is 1 h, the current density is 0.2 A/dm ² , and the oxidation treatment temperature is 20°C.

The preparation method of the penetrant of the present embodiment is to add ZnCl with a concentration of 0.5mol/L into the four _- necked reaction flask, then add glacial acetic acid to adjust the pH to 4.0, and then dropwise add to the four-necked flask at a speed of 2ml/min The quantum dot additive solution is added dropwise while stirring, and finally the rare earth lanthanum chloride is added, and the stirring is continued for 10 minutes.

The preparation method of the quantum dot additive solution in this embodiment is to add nano-diamonds into an acetone solution at a weight ratio of 1:4, ultrasonically disperse for 20 minutes, then add a silica microsphere emulsion with 5% of the total amount of nano-diamonds, and continue stirring. 20min is enough.

The compression layer of this embodiment includes the following raw materials in parts by weight:

30 parts of natural rubber, 20 parts of styrene-butadiene rubber, 5 parts of recycled rubber, 4 parts of white carbon black, 3 parts of cellulose nanowhisker, 5 parts of tin oxide, 5 parts of vulcanizing agent, 2 parts of compatibilizer, modified alkali wood 1 serving.

The preparation method of the modified alkali lignin of the present embodiment is to add the alkali lignin into a magnetic stirrer, then add it into deionized water containing silane, increase the rotation speed to 200r/min, stir for 10min, and the stirring temperature is 70 ℃, then add sepiolite powder with 10% total alkali lignin, stir for 20min, finally add 2% total alkali lignin glycidyl methacrylate, continue stirring for 1h, the reaction is over, centrifuge, wash, dry, That's it.

The vulcanizing agent in this embodiment is tetrabenzylthiuram disulfide; the compatibilizer is oxazoline type.

A method for preparing a high-performance V-belt of the present embodiment includes the following steps:

Step 1: First masticate natural rubber, styrene-butadiene rubber and regenerated rubber for 80s, then add silica, cellulose nanowhisker, tin oxide, modified alkali lignin, vulcanizing agent, and compatibilizer to continue mixing. 100s, and then calendering to obtain a compression layer;

Step 2, plasticizing neoprene and natural rubber for 70s, then adding polyurethane resin, talc, aromatic oil, and sodium tripolyphosphate and continuing to mix for 100s to obtain a stretch layer rubber, which is used for later use;

Step 3, heating the standby stretch layer sizing material in step 2 to melting, then pulling the surface-modified tempered brown wire from the molten stretch layer sizing material to wrap the surface-modified tempered brown filament in the stretching layer sizing material, The buffer cord is formed, which is then reeled by turning rollers to form a pre-applied layer;

Step 4: Adhere the compression layer obtained in step 1 to the lower part of the pre-applied layer to form a base layer, then wrap the base layer through a cloth wrapping layer to form a pre-used V-belt, put the pre-used V-belt into the mold and send it into the Vulcanization is carried out in a vulcanization tank, and then cutting and grinding are performed to obtain a finished product, which is then inspected, packaged and stored to obtain the high-performance V-belt of the present invention.

Example 2:

A high-performance V-belt of this embodiment, the V-belt includes a strength layer, an upper portion of the strength layer is provided with a stretch layer, a lower portion of the strength layer is provided with a compression layer, and the outer side of the stretch layer and the compression layer is wrapped with a cloth layer;

The strength layer is surface-modified tempered brown wire;

The stretch layer includes the following raw materials in parts by weight:

50 parts of neoprene rubber, 15 parts of natural rubber, 20 parts of polyurethane resin, 20 parts of talc, 10 parts of aromatic oil, and 9 parts of sodium tripolyphosphate.

The preparation method of the surface-modified tempered brown wire in this embodiment is to soak the tempered brown wire in a nitric acid solution for 2 hours, then take it out, rinse it with deionized water, air dry it, and place it in a sodium hydroxide solution with a concentration of 10%. , using alternating current for surface oxidation treatment, and then placing it in a concentration of 2.5mol/L sodium hypochlorite to react for 20-30min, then using deionized water to rinse 3 times, and then adding the penetrant to the autoclave at a weight ratio of 1:3 , the reaction pressure is 4MPa, the reaction temperature is 110°C, and the reaction time is 5h, the reaction is over, then washed with water, and then dried in a constant temperature drying oven at 60°C for 3h.

In this embodiment, the time for surface oxidation by alternating current is 3h, the current density is 0.5A/dm ² , and the oxidation treatment temperature is 30°C.

The preparation method of the penetrant of the present embodiment is to add ZnCl with a concentration of _1.5mol /L into the four-necked reaction flask, then add glacial acetic acid to adjust the pH to 5.0, and then dropwise add to the four-necked flask at a speed of 5ml/min The quantum dot additive solution is added dropwise while stirring, and finally the rare earth lanthanum chloride is added, and the stirring is continued for 20 minutes.

The preparation method of the quantum dot additive solution in this embodiment is to add nano-diamonds into an acetone solution at a weight ratio of 1:4, ultrasonically disperse for 30 minutes, and then add a silica microsphere emulsion containing 9% of the total amount of nano-diamonds, and continue stirring. 30min is enough.

The compression layer of this embodiment includes the following raw materials in parts by weight:

40 parts of natural rubber, 30 parts of styrene-butadiene rubber, 15 parts of recycled rubber, 8 parts of white carbon black, 6 parts of cellulose nanowhisker, 10 parts of tin oxide, 9 parts of vulcanizing agent, 6 parts of compatibilizer, modified alkali wood 4 servings.

The preparation method of the modified alkali lignin of the present embodiment is to add the alkali lignin to a magnetic stirrer, then add it to deionized water containing silane, increase the rotation speed to 400r/min, stir for 20min, and the stirring temperature is 90 ℃, then add sepiolite powder with 20% total amount of alkali lignin, stir for 30min, finally add glycidyl methacrylate with 8% total amount of alkali lignin, continue stirring for 2h, the reaction is over, centrifuge, wash, dry, That's it.

The vulcanizing agent in this embodiment is tetrabenzylthiuram disulfide; the compatibilizer is oxazoline type.

A method for preparing a high-performance V-belt of the present embodiment includes the following steps:

Step 1, masticate natural rubber, styrene-butadiene rubber, and regenerated rubber for 100s, then add silica, cellulose nanowhisker, tin oxide, modified alkali lignin, vulcanizing agent, and compatibilizer to continue mixing. 200s, and then calendering to obtain a compression layer;

In step 2, the chloroprene rubber and natural rubber are first masticated for 80s, and then polyurethane resin, talc, aromatic oil, and sodium tripolyphosphate are added to continue mixing for 200s to obtain a stretch layer rubber compound, which is used for later use;

Step 3, heating the standby stretch layer sizing material in step 2 to melting, then pulling the surface-modified tempered brown wire from the molten stretch layer sizing material to wrap the surface-modified tempered brown filament in the stretching layer sizing material, The buffer cord is formed, which is then reeled by turning rollers to form a pre-applied layer;

Step 4: Adhere the compression layer obtained in step 1 to the lower part of the pre-applied layer to form a base layer, then wrap the base layer through a cloth wrapping layer to form a pre-used V-belt, put the pre-used V-belt into the mold and send it into the Vulcanization is carried out in a vulcanization tank, and then cutting and grinding are performed to obtain a finished product, which is then inspected, packaged and stored to obtain the high-performance V-belt of the present invention.

Example 3:

A high-performance V-belt of this embodiment, the V-belt includes a strength layer, an upper portion of the strength layer is provided with a stretch layer, a lower portion of the strength layer is provided with a compression layer, and the outer side of the stretch layer and the compression layer is wrapped with a cloth layer;

The strength layer is surface-modified tempered brown wire;

The stretch layer includes the following raw materials in parts by weight:

45 parts of neoprene rubber, 10 parts of natural rubber, 15 parts of polyurethane resin, 15 parts of talc, 7 parts of aromatic oil, and 4.5 parts of sodium tripolyphosphate.

The preparation method of the surface-modified tempered brown wire in this embodiment is to first soak the tempered brown wire in a nitric acid solution for 1.5 hours, then take it out and rinse it with deionized water, then air dry, and then place it in 10% sodium hydroxide solution In the solution, use alternating current for surface oxidation treatment, and then place it in a concentration of 2mol/L sodium hypochlorite to react for 25min, then use deionized water to rinse 3 times, and then add the penetrant to the autoclave in a weight ratio of 1:3, The reaction pressure was 3MPa, the reaction temperature was 105°C, and the reaction time was 3.5h. After the reaction was over, it was washed with water and dried in a constant temperature drying oven at 50°C for 2.5h.

In this embodiment, the time for surface oxidation by alternating current is 2h, the current density is 0.35A/dm ² , and the oxidation treatment temperature is 25°C.

The preparation method of the penetrant of the present embodiment is to add ZnCl with a concentration of 1.0mol/L into the four _- necked reaction flask, then add glacial acetic acid to adjust the pH to 4.5, and then dropwise into the four-necked flask at a speed of 3.5ml/min Add the quantum dot additive solution, add dropwise while stirring, and finally add rare earth lanthanum chloride and continue stirring for 15min.

The preparation method of the quantum dot additive solution in this embodiment is to add the nano-diamonds into the acetone solution according to the weight ratio of 1:4, ultrasonically disperse for 25 minutes, then add the silica microsphere emulsion with 7% of the total amount of nano-diamonds, and continue stirring. 25min is enough.

The compression layer of this embodiment includes the following raw materials in parts by weight:

35 parts of natural rubber, 25 parts of styrene-butadiene rubber, 10 parts of recycled rubber, 6 parts of white carbon black, 4.5 parts of cellulose nanowhisker, 7.5 parts of tin oxide, 7 parts of vulcanizing agent, 4 parts of compatibilizer, modified alkali wood 2.5 servings of vegetarian food.

The preparation method of the modified alkali lignin of the present embodiment is to add the alkali lignin to a magnetic stirrer, then add it to deionized water containing silane, increase the rotation speed to 300r/min, stir for 15min, and the stirring temperature is 80 ℃, then add sepiolite powder with 15% total alkali lignin, stir for 25min, finally add 5% total alkali lignin glycidyl methacrylate, continue stirring for 1.5h, the reaction is over, centrifuge, wash, dry , you can.

The vulcanizing agent in this embodiment is tetrabenzylthiuram disulfide; the compatibilizer is oxazoline type.

A method for preparing a high-performance V-belt of the present embodiment includes the following steps:

Step 1: First masticate natural rubber, styrene-butadiene rubber and regenerated rubber for 90s, then add silica, cellulose nanowhisker, tin oxide, modified alkali lignin, vulcanizing agent, and compatibilizer to continue mixing. 150s, and then calendering to obtain a compression layer;

In step 2, chloroprene rubber and natural rubber are first masticated for 75s, and then polyurethane resin, talcum powder, aromatic oil, and sodium tripolyphosphate are added for continuous mixing for 150s to obtain a stretch layer rubber, which is used for later use;

Step 3, heating the standby stretch layer sizing material in step 2 to melting, then pulling the surface-modified tempered brown wire from the molten stretch layer sizing material to wrap the surface-modified tempered brown filament in the stretching layer sizing material, The buffer cord is formed, which is then reeled by turning rollers to form a pre-applied layer;

Step 4: Adhere the compression layer obtained in step 1 to the lower part of the pre-applied layer to form a base layer, then wrap the base layer through a cloth wrapping layer to form a pre-used V-belt, put the pre-used V-belt into the mold and send it into the Vulcanization is carried out in a vulcanization tank, and then cutting and grinding are performed to obtain a finished product, which is then inspected, packaged and stored to obtain the high-performance V-belt of the present invention.

Comparative Example 1:

The V-belt of Example 1 in a high-strength V-belt disclosed in Chinese Patent Document (Publication No.: CN108189497A) was used for testing.

Comparative Example 2:

The Chinese patent document (publication number: CN103966853A) discloses a polyester tempered brown wire bonding activator and the tempered brown wire in the treatment process of the polyester tempered brown wire to replace the surface-modified tempered brown wire of Example 3.

Comparative Example 3:

The only difference from the preparation method of the surface-modified tempered brown silk in Example 3 is that the surface oxidation treatment is not carried out with alternating current.

Comparative Example 4:

The Chinese patent document (Publication No.: CN108189497A) discloses a rubber composition for manufacturing a compression layer of a cloth-covered V-belt and the material in the preparation method thereof as the compression layer of the present invention.

Comparative Example 5:

The material and preparation process are exactly the same as those in Example 3, the only difference is that no cellulose nanowhiskers are added to the compression layer.

Comparative Example 6:

The material and preparation process are exactly the same as those in Example 3, the only difference is that no modified alkali lignin is added to the compression layer.

Comparative Example 7:

The material and preparation process are exactly the same as those in Example 3, the only difference is that no sepiolite powder is added in the modification of alkali lignin.

The bond strength of the cord is tested according to the test standard of GB/T 3688-1983 "Test Method for Bonding Strength of V-belt Cord and Rubber";

The test method is as follows:

Put the sample on the support, let the stripped center wire sag from the opening of the support, clamp the wire into the lower holder, adjust the position of the sample in the support, so that the wire is in the opening At the center of the width, start the testing machine, pull the cord until it is completely pulled out, and measure the pull-out force applied to the sample, which is the bond strength of the cord.

The rope bond strength test results are as follows:

From Example 3 and Comparative Examples 1-3, it can be concluded that compared with Comparative Example 1, Example 3 of the present invention has an increase of 12KN.m ^-1 in the bonding strength of the cord, and the improvement rate is 44.44%. Compared with Comparative Example 2, The bonding strength of the wire rope is increased by 8KN.m ^-1 , and the improvement rate is 25.80%. It can be seen that the use of the modified tempered brown wire of the present invention can significantly improve the bonding strength of the wire rope.

In addition, the present invention also explores the fatigue life and tensile strength of the V-belt.

Fatigue resistance life test method, cut the sample to a length of 100mm, a width of 20mm and a thickness of 4mm, and then put it under the fatigue testing machine for testing, record the initial test time A, when the triangle belt has cracks and other abnormal phenomena, the recording will be terminated Time B, fatigue life = B-A.

The tensile strength was tested by a V-belt tensile strength testing machine.

The test results are as follows:

Compared with Comparative Example 4, the tensile strength of Example 3 of the present invention increased by 4KN, and the improvement rate was 80%. At the same time, the added modified alkali lignin increased the tensile strength by 3KN, and the added cellulose nanowhiskers increased 2KN.

The compression layer has a great influence on the performance of the V-belt, so the present invention also explores the performance of the rubber material of the compression layer.

Tested performance standard test Tensile properties GB/T 528-1998 hardness GB/T 6031-1998 DIN wear GB/T 9867-88

Embodiment 1-3 and comparative example 4-7 obtain compression layer performance test result as follows

It can be concluded from Comparative Example 3 and Comparative Examples 4-7 that, compared with Comparative Example 4, the tensile strength of Example 3 of the present invention is increased by 5.0MPa, and the improvement rate is 42.02%; the elongation at break is increased by 103MPa, and the improvement rate is 42.02%. The DIN wear volume decreased by 26mm ³ , and the improvement rate was 14.61%; the elongation at break of the modified alkali lignin added at the same time increased by 71MPa, the tensile strength increased by 3.8MPa, and the mechanical properties were significantly improved.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the appended claims. All changes within the meaning and scope of the equivalents of , are included in the present invention.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (9)

1. A high-performance triangular belt comprises a strong layer and is characterized in that a stretching layer is arranged at the upper part of the strong layer, a compression layer is arranged at the lower part of the strong layer, and a cloth coating layer is wrapped at the outer sides of the stretching layer and the compression layer;

the strong layer is a surface modified toughened palm fiber;

the stretching layer comprises the following raw materials in parts by weight:

40-50 parts of chloroprene rubber, 5-15 parts of natural rubber, 10-20 parts of polyurethane resin, 10-20 parts of talcum powder, 4-10 parts of aromatic oil and 3-9 parts of sodium tripolyphosphate;

the compression layer comprises the following raw materials in parts by weight:

30-40 parts of natural rubber, 20-30 parts of styrene-butadiene rubber, 5-15 parts of regenerated rubber, 4-8 parts of white carbon black, 3-6 parts of cellulose nanowhiskers, 5-10 parts of tin oxide, 5-9 parts of a vulcanizing agent, 2-6 parts of a compatilizer and 1-4 parts of modified alkali lignin.

2. The high-performance V-belt as claimed in claim 1, wherein the surface-modified toughened palm fiber is prepared by soaking the toughened palm fiber in a nitric acid solution for 1-2h, taking out and washing with deionized water, air-drying, placing in a 10% sodium hydroxide solution, performing surface oxidation treatment with alternating current, placing in sodium hypochlorite with a concentration of 1.5-2.5 mol/L for 20-30min, washing with deionized water for 2-3 times, adding the deionized water and a penetrant into a high-pressure reaction kettle according to a weight ratio of 1:3, reacting at a pressure of 2-4MPa and a reaction temperature of 100 ℃ and 110 ℃ for 2-5h, finishing the reaction, washing with water, and drying in a constant-temperature drying oven at 40-60 ℃ for 2-3 h.

3. The V-belt according to claim 2, wherein the alternating current is applied for a surface oxidation time of 1-3 hours and a current density of 0.2-0.5A/dm²The temperature of the oxidation treatment is 20-30 ℃.

4. The V-belt according to claim 3, wherein the alternating current is applied for a surface oxidation time of 2 hours and a current density of 0.35A/dm²The temperature of the oxidation treatment was 25 ℃.

5. The V-belt according to claim 2, wherein the penetrating agent is prepared by mixing ZnCl with a concentration of 0.5-1.5 mol/L₂Adding into a four-mouth reaction bottle, adding glacial acetic acid to adjust pH to 4.0-5.0, adding quantum dot auxiliary agent liquid dropwise into the four-mouth reaction bottle at a speed of 2-5ml/min while stirring, adding rare earth lanthanum chloride, and continuously stirring for 10-20 min.

6. The high-performance V-belt according to claim 5, wherein the quantum dot assistant liquid is prepared by adding nanodiamond into acetone solution according to a weight ratio of 1:4, performing ultrasonic dispersion for 20-30min, adding silica microsphere emulsion accounting for 5-9% of the total amount of nanodiamond, and continuing stirring for 20-30 min.

7. The high-performance V-belt as claimed in claim 1, wherein the modified alkali lignin is prepared by adding alkali lignin into a magnetic stirrer, adding into silane-containing deionized water, increasing the rotation speed to 200-400r/min, stirring for 10-20min at 70-90 ℃, adding sepiolite powder accounting for 10-20% of the total amount of alkali lignin, stirring for 20-30min, adding glycidyl methacrylate accounting for 2-8% of the total amount of alkali lignin, stirring for 1-2h, reacting, centrifuging, washing, and drying.

8. The high performance V-belt according to claim 1 wherein said vulcanizing agent is tetrabenzylthiuram disulfide; the compatibilizer is an oxazoline.

9. A method of making a high performance v-belt according to any one of claims 1 to 8, comprising the steps of:

firstly, plasticating natural rubber, styrene-butadiene rubber and regenerated rubber for 80-100s, then adding white carbon black, cellulose nanowhiskers, tin oxide, modified alkali lignin, a vulcanizing agent and a compatilizer, continuously mixing for 100-200s, and then calendering to obtain a compression layer;

plasticating chloroprene rubber and natural rubber for 70-80s, then adding polyurethane resin, talcum powder, aromatic oil and sodium tripolyphosphate, and continuously mixing for 100-200s to obtain a stretching layer rubber material for later use;

step three, heating the stretching layer rubber material prepared in the step two to be molten, then drawing the surface-modified toughened palm fibers from the molten stretching layer rubber material until the stretching layer rubber material wraps the surface-modified toughened palm fibers to form buffer cords, and then rolling the buffer cords through a rotating roller to form a pre-used layer;

and step four, adhering the compression layer obtained in the step one to the lower part of the pre-use layer to form a base layer, wrapping the base layer through a cloth wrapping layer to form a pre-use triangular belt, putting the pre-use triangular belt into a mould, conveying the pre-use triangular belt into a vulcanizing tank for vulcanizing, then cutting and polishing to obtain a finished product, and then inspecting, packaging and storing to obtain the high-performance triangular belt.