CN209888321U - Polyester tangential belt with long service life - Google Patents
Polyester tangential belt with long service life Download PDFInfo
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- CN209888321U CN209888321U CN201920401980.4U CN201920401980U CN209888321U CN 209888321 U CN209888321 U CN 209888321U CN 201920401980 U CN201920401980 U CN 201920401980U CN 209888321 U CN209888321 U CN 209888321U
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Abstract
The polyester tangential belt with the long service life comprises an upper rubber transmission layer, an upper buffer layer, a framework layer, a lower buffer layer and a lower rubber friction layer which are sequentially adhered from top to bottom, wherein the upper buffer layer comprises at least one group of first elastomer layer and second elastomer layer which are sequentially adhered from top to bottom or at least one group of second elastomer layer and first elastomer layer which are sequentially adhered from top to bottom; the lower buffer layer comprises at least one group of first elastomer layers and second elastomer layers which are sequentially adhered from top to bottom or at least one group of second elastomer layers and first elastomer layers which are sequentially adhered from top to bottom; the first and second elastomer layers are TPU sheet layers having a hardness of 95A and 85A, respectively. The utility model discloses changed the single structure of buffer layer, the TPU sheet through different hardness, thickness is compound, increases the intensity of joint department, reaches the purpose that improves life.
Description
Technical Field
The utility model belongs to the technical field of the industry transmission flat belt, concretely relates to polyester tangential belt with high life.
Background
At present, most of the framework materials of the belt used in the field of industrial conveying and transmission are polyamide (nylon) sheets, and the defects are that the belt body has high hardness, large wheel diameter, large tension deformation, large influence of temperature and humidity on the belt body and easy bending deformation. Another large category of commonly used drive belts in the drive belt industry is the polyester fiber based carcass, i.e., the polyester belt. The conventional polyester tape is composed of five layers, from top to bottom: the rubber friction layer comprises an upper rubber transmission layer, an upper thermoplastic polyurethane elastomer (TPU) buffer layer, a middle polyester fiber framework layer, a lower TPU buffer layer and a lower rubber friction layer. Because the polyester fiber framework is used for replacing the polyamide nylon framework, the tension shape of the polyester belt is changed little, and the size and the appearance are more stable.
The polyester tape uses a thermoplastic elastomer-polyurethane as a cushion layer. The thermoplastic elastomer material is usually selected to have a hardness of 95A and a high mechanical strength, which can meet the light requirements of high-speed running of the polyester belt body. When the linear polyester belt is connected into an annular belt, the two ends of the belt body are processed into saw teeth which can be in seamless butt joint by a gear-making machine, and the length of the teeth is generally 90 mm. Subjecting the spliced tooth-shaped joint to high temperature of 165 ℃ and pressure of 2MPa for 3min, cooling, and cooling to room temperature. Because the TPU sheet at the joint must be subjected to a high temperature treatment of 165 c during connection, the TPU material that is subjected to the high temperature treatment and then cooled is mechanically degraded to a great extent and has a certain brittleness and becomes hard, which results in the joint becoming a "weak" point in the mechanical properties of the entire belt body, which is susceptible to breakage during repeated continuous high speed operation.
It was also found when tracking customer usage of polyester tape that 95% of the polyester tape was not able to be used further because of the broken joint. Therefore, the key factors limiting the service life of polyester tapes are the strength and mechanical properties of the joint. Therefore, there is a need to further improve the structural composition of the polyester belt to make the joint have better strength when forming an annular belt, so as to meet the use requirement.
Disclosure of Invention
An object of the utility model is to provide a polyester tangential belt with high life improves the intensity that the polyester area was plugged into and is connected when taking the girdle, ensures that the hardness change of joint department is little to make the softness of joint department better, improve the life in polyester girdle.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model provides a polyester tangential belt with long service life, which comprises an upper rubber transmission layer, an upper buffer layer, a framework layer, a lower buffer layer and a lower rubber friction layer which are sequentially adhered from top to bottom, wherein the upper buffer layer comprises at least one group of first elastomer layer and second elastomer layer which are sequentially adhered from top to bottom or at least one group of second elastomer layer and first elastomer layer which are sequentially adhered from top to bottom; the lower buffer layer comprises at least one group of first elastomer layers and second elastomer layers which are sequentially adhered from top to bottom or at least one group of second elastomer layers and first elastomer layers which are sequentially adhered from top to bottom;
the upper rubber transmission layer and the lower rubber friction layer are all carboxyl nitrile rubber layers; the first elastomer layer in the upper buffer layer and the lower buffer layer is a TPU sheet layer with the hardness of 95A and the thickness of 0.15-0.4 mm, and the second elastomer layer is a TPU sheet layer with the hardness of 85A and the thickness of 0.05-0.2 mm; the framework layer is made of polyester cloth, and the 1% stress at definite elongation is more than or equal to 30N/mm.
Preferably, in the polyester tangential belt structure go up the rubber drive layer thickness and be 0.1 ~ 0.15mm, go up the buffer layer, first elastomer layer thickness is 0.15 ~ 0.4mm in the buffer layer down, second elastomer layer thickness is 0.05 ~ 0.2mm, the skeleton layer thickness is 0.6 ~ 0.75mm, rubber friction layer thickness is 0.1 ~ 0.15mm down.
The utility model discloses in go up rubber drive layer, lower rubber frictional layer and be the rubber material, obtain by the preparation of the rubber crude rubber of purchase. In order to improve the wear resistance, the raw rubber is carboxyl nitrile rubber, and the carboxyl nitrile rubber is selected from Japanese ZONE company brand NX 775. Compared with the conventional common nitrile rubber JSR3250, 220 and other brands of rubber in the transmission industry, the carboxyl nitrile has better wear resistance and longer service life due to the introduction of carboxyl into the molecular chain of the rubber.
The utility model discloses in go up the buffer layer and include at least a set of from last to down when the first elastomer layer of adhesion in proper order, second elastomer layer, first elastomer adhesion in go up the rubber drive layer, the second elastomer adhesion in the casing ply. When the upper buffer layer comprises at least one group of second elastomer layers and first elastomer layers which are sequentially adhered from top to bottom, the second elastomer is adhered to the upper rubber transmission layer, and the first elastomer is adhered to the framework layer.
The utility model discloses in when the buffer layer includes at least a set of first elastomer layer, the second elastomer layer of following adhesion in proper order down from last down, first elastomer adhesion in the casing ply, the second elastomer adhesion in rubber drive layer down. When the lower buffer layer comprises at least one group of second elastomer layers and first elastomer layers which are sequentially adhered from top to bottom, the second elastomer is adhered to the framework layer, and the first elastomer is adhered to the lower rubber transmission layer.
The utility model discloses in first elastomer layer, second elastomer layer arrangement order can be the same also can be inequality in going up buffer layer, lower buffer layer structure, goes up buffer layer gross thickness and lower buffer layer gross thickness the same.
In a preferred embodiment of the present invention, the upper buffer layer comprises a first elastomer layer, a second elastomer layer, a first elastomer layer, and a second elastomer layer, which are sequentially adhered from top to bottom; the lower buffer layer comprises a second elastomer layer, a first elastomer layer, a second elastomer layer and a first elastomer layer which are sequentially adhered from top to bottom.
In a preferred embodiment of the present invention, the upper buffer layer comprises a second elastomer layer, a first elastomer layer, a second elastomer layer, and a first elastomer layer, which are sequentially adhered from top to bottom; the lower buffer layer comprises a first elastomer layer, a second elastomer layer, a first elastomer layer and a second elastomer layer which are sequentially adhered from top to bottom.
In a preferred embodiment of the present invention, the upper buffer layer comprises a first elastomer layer, a second elastomer layer, a first elastomer layer, and a second elastomer layer, which are sequentially adhered from top to bottom; the lower buffer layer comprises a first elastomer layer, a second elastomer layer, a first elastomer layer and a second elastomer layer which are sequentially adhered from top to bottom.
In a preferred embodiment of the present invention, the upper buffer layer comprises a second elastomer layer, a first elastomer layer, a second elastomer layer, and a first elastomer layer, which are sequentially adhered from top to bottom; the lower buffer layer comprises a second elastomer layer, a first elastomer layer, a second elastomer layer and a first elastomer layer which are sequentially adhered from top to bottom.
The preparation method of the polyester tangential belt with long service life comprises the following steps:
(1) manufacturing of upper rubber transmission layer and lower rubber friction layer
In order to improve the wear resistance of the upper rubber transmission layer and the lower rubber friction layer, selecting the carboxylated nitrile butadiene rubber (XNBR) with better wear resistance as main rubber, plasticating, mixing and vulcanizing the raw carboxylated nitrile rubber to obtain mixed rubber with good dispersibility, and preparing the mixed rubber into a carboxylated nitrile rubber film for later use by calendaring and other preparation processes;
(2) adhesive formulation
a. Preparation of adhesive A
Adding polyurethane TPU particles into an organic solvent butanone, stirring and dissolving for 4 hours to obtain a viscous liquid, adding the viscous liquid and methanol into the mixed rubber prepared in the step (1), stirring for 4 hours at a constant temperature of 60 ℃, then adding a curing agent (the mark is Bayer N3390) accounting for 3% of the mass of the total solution and an emulsifier (the mark is OP-10 American Dow) accounting for 0.05% of the mass of the total solution, and continuously stirring for 0.5 hour to prepare an adhesive A with the viscosity of 1500Pa.s (measured at 40 ℃);
the mass part ratio of the polyurethane TPU particles to the butanone is 3: 5, and the mass part ratio of the viscous liquid, the mixed rubber prepared in the step (1) and the methanol is 4: 1: 0.5;
b. preparation of adhesive B
Polyurethane TPU particles and an organic solvent butanone are mixed according to the mass ratio of 2: 5, heated to 60 ℃, stirred and dissolved for 4 hours, then a curing agent (the mark is Bayer N3390) accounting for 4.5 percent of the mass of the total solution and an emulsifier (the mark is OP-10 US Dow) accounting for 0.05 percent of the mass of the total solution are added, and the stirring is continued for 0.5 hour, thus preparing the adhesive B with the viscosity of 1400Pa.s (measured at 40 ℃).
(3) Adhesive coating
a. Coating an upper rubber transmission layer and a lower rubber friction layer: coating an adhesive A on one side surface of the upper rubber transmission layer and the lower rubber friction layer prepared in the step (1), wherein the coating thickness is 0.05mm, drying at 65 ℃, and isolating and winding film paper for later use;
b. coating of the first elastomer layer and the second elastomer layer: in the upper buffer layer and the lower buffer layer, coating an adhesive B on any side surface of the first elastic body layer and the second elastic body layer, wherein the coating thickness is 0.05mm, drying at 65 ℃, and isolating and winding the film paper for later use;
c. coating of the skeleton layer: coating a layer of adhesive B on the upper surface and the lower surface of the polyester cloth of the framework layer respectively, wherein the thickness of the coating layer is 0.05mm, drying at 80 ℃, and winding the film paper in an isolation way for later use;
(4) compounding of polyester tangential belt
a. The upper rubber transmission layer and the upper buffer layer are compounded:
sequentially and parallelly superposing a plurality of first elastomer layers and a plurality of second elastomer layers from top to bottom according to an upper buffer layer structure, attaching one side of an upper rubber transmission layer coated with an adhesive A to the upper surface of an upper buffer layer, namely the upper surface of the first elastomer layer or the second elastomer layer, compounding by using a drum vulcanizing machine, compounding the layers under the action of the adhesive A or the adhesive B, controlling the compounding temperature to be 120 ℃, the pressure to be 8MPa and the frequency of a main drum motor to be 30HZ, thus obtaining an upper composite layer, and winding the upper composite layer for later use;
b. the lower rubber friction layer and the lower buffer layer are compounded to form a lower composite layer:
sequentially and parallelly superposing a plurality of first elastomer layers and a plurality of second elastomer layers from top to bottom according to a lower buffer layer structure, attaching one side of a lower rubber friction layer coated with an adhesive A to the lower surface of a lower buffer layer, namely the lower surface of the first elastomer layer or the lower surface of the second elastomer layer, compounding by using a drum vulcanizing machine, compounding the layers under the action of the adhesive A or the adhesive B, controlling the compounding temperature to be 120 ℃, the pressure to be 8MPa and the frequency of a main drum motor to be 30HZ, thus obtaining a lower composite layer, and winding the lower composite layer for later use;
c. compounding an upper compound layer, a lower compound layer and a middle framework layer:
sequentially laminating and stacking the upper composite layer, the framework layer coated with the adhesive B on the upper surface and the lower composite layer in parallel, conveying the laminated composite layer into a drum vulcanizer for compounding, compounding under the action of the adhesive B coated on the upper surface and the lower surface of the framework layer, controlling the compounding temperature at 120 ℃, the pressure at 8MPa and the frequency of a main drum motor at 30HZ to obtain a semi-finished polyester tangential belt, and winding the semi-finished polyester tangential belt for later use;
(5) vulcanization of polyester tangential belt semi-finished product
And (3) feeding the semi-finished polyester belt into a flat vulcanizing machine, vulcanizing the semi-finished polyester belt in a split mold mode according to the length of a flat mold, wherein the vulcanizing temperature is 152 ℃, the vulcanizing pressure is 15MPa, and the vulcanizing time is 20 minutes.
Preferably, in the step (1), the method for preparing the carboxylated nitrile rubber film from the carboxylated nitrile rubber raw rubber comprises the following steps: putting raw carboxyl nitrile rubber into an internal mixer, carrying out internal mixing for 1 minute, adding white carbon black serving as a reinforcing agent, continuously carrying out internal mixing for 2 minutes, putting rubber oil (comprising dibutyl ester and a silane coupling agent), an antistatic agent (a cationic quaternary ammonium salt surfactant and an anionic sulfonate surfactant), a vulcanization aid (comprising zinc oxide and stearic acid) and a rubber protective agent (comprising a phenol antioxidant 2246, active black, rubber protective wax and an anti-aging agent RD), continuously carrying out internal mixing, and discharging mixed rubber when the temperature reaches 120 ℃; cooling the rubber material to 60 ℃, thinly passing the rubber material in an open mill once, adding vulcanizing agents (comprising sulfur, 2' -dithiodibenzothiazyl and N-cyclohexyl-2-benzothiazole sulfenamide), swinging the rubber in the open mill, checking the section of the rubber sheet by a visual method, and preparing the mixed rubber with good dispersibility by using undispersed chemical raw materials which are not visible to the naked eye; and (3) rolling the mixed rubber on the nylon lining cloth through a rolling mill to form a rubber sheet with the thickness of 0.7-0.9 mm, and rolling for later use.
Further, in the step (1), the carboxyl nitrile rubber film is prepared from the following components in parts by weight: 100 parts of raw carboxyl nitrile rubber, 40-60 parts of reinforcing agent, 7-11 parts of rubber oil, 8-12 parts of antistatic agent, 6-8 parts of vulcanization assistant, 6-10 parts of rubber protective agent and 15-20 parts of vulcanizing agent.
Preferably, in the steps (1) and (2), the polyurethane TPU particles can be selected from one or more of German BASF 1185A, American Dow 2355-85ABR, German BASF 1185A10FHF thermoplastic elastomer TPU particle products.
Preferably, the antistatic agent of the present invention is selected from any one of SN (octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate), NP (sodium p-nonylphenoxypropane sulfonate), DPE (potassium p-nonylphenyl ether sulfonate), and more preferably SN.
The utility model discloses the adhesive A of preparation is used for bonding rubber drive layer and first elastomer layer TPU sheet or second elastomer layer TPU sheet, rubber frictional layer and first elastomer layer TPU sheet or second elastomer layer TPU sheet under the bonding. The utility model discloses the bonding of adhesive B of preparation is used for bonding between first elastomer layer TPU sheet, the second elastomer layer TPU sheet and the bonding of casing ply and first elastomer layer TPU sheet or second elastomer layer TPU sheet.
Through detection, the 1% stretching strength of the polyester tangential belt finished product provided by the utility model is more than or equal to 16N/mm, and the tensile strength of the belt body is more than or equal to 165N/mm; will the utility model provides a polyester tangential belt finished product plug into for behind the annular tangential belt, joint department snap strength is greater than or equal to 155N/mm, and the hardness change of joint department is less than or equal to +2 degrees, and is visible, and joint department intensity promotes obviously, and the hardness change of joint department is littleer, and it is better to connect the compliance.
Due to the adoption of the technical scheme, the utility model has the advantages of it is following and beneficial effect:
(1) the utility model discloses increased one deck elastomer layer in the buffer layer structure in polyester area, TPU sheet compound through different hardness, different melting points, different thickness, the single structure of buffer layer in the polyester area has been changed, specifically used the TPU sheet of low melting point in the buffer layer and be second elastomer layer (hardness 85A), in the process of plugging into the polyester area as the girdle, when being heated and reaching second elastomer layer TPU melting point, buffer layer sheet department molten state, have certain mobility, the tooth type sheet melt polymerization of molten state is whole on the one hand, reach the purpose of plugging into; on the other hand, the sheet material in a molten state can permeate into the warp and weft gaps of the polyester cloth of the middle framework layer, so that the strength of the joint can be increased, and the purpose of prolonging the service life is achieved.
(2) The utility model discloses the intensity of the polyester tangential belt body of preparation keeps unchangeable, nevertheless plugs into for behind the annular tangential belt, and the promotion of joint department intensity is obvious, and the hardness change of joint department is littleer, and it is better to connect the compliance.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 4 of the present invention.
Detailed Description
In order to illustrate the invention more clearly, the invention is further described below with reference to preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
The utility model discloses well used raw materials is conventional market purchase product, and used equipment is conventional equipment.
Example 1
As shown in fig. 1, a novel polyester tangential belt sequentially comprises from top to bottom: the rubber friction layer comprises an upper rubber transmission layer 110, an upper buffer layer 210, a framework layer 300, an upper buffer layer 220 and a lower rubber friction layer 120, wherein the upper buffer layer 210 is sequentially provided with a first elastomer layer 201, a second elastomer layer 202, a first elastomer layer 201 and a second elastomer layer 202 from top to bottom, the first elastomer layer 201 is a TPU sheet layer with the hardness of 95A and the thickness of 0.2mm, and the second elastomer layer 202 is a TPU sheet layer with the hardness of 85A and the thickness of 0.1 mm; the lower buffer layer is sequentially provided with a second elastomer layer 202, a first elastomer layer 201, a second elastomer layer 202 and a first elastomer layer 201 from top to bottom, the first elastomer layer 201 is a TPU sheet layer with the hardness of 95A and the thickness of 0.2mm, and the second elastomer layer 202 is a TPU sheet layer with the hardness of 85A and the thickness of 0.1 mm; the framework layer 300 is polyester cloth with the thickness of 0.5mm (the thickness of the polyester cloth is required to be +/-0.03 mm, the 1% stress at definite elongation is more than or equal to 30N/mm, Wujiang Fengyue industrial cloth Co., Ltd); the upper rubber transmission layer 110 is an NX775 carboxyl nitrile rubber layer, and the thickness of the upper rubber transmission layer 110 is 0.1 mm; the lower rubber friction layer 120 is an NX775 carboxylated nitrile rubber layer, and the thickness of the lower rubber friction layer 120 is 0.1 mm.
The preparation method of the novel polyester tangential belt comprises the following steps:
(1) fabrication of the upper rubber transmission layer 110 and the lower rubber friction layer 120
In order to improve the wear resistance of the surface rubber friction layer, the carboxylated nitrile butadiene rubber (XNBR) with better wear resistance is selected as the main rubber, and plastication, mixing, vulcanization, calendering and other processes are carried out according to the raw material proportion in the table 1 to prepare the carboxylated nitrile butadiene rubber film, which specifically comprises the following steps:
the preparation method comprises the following steps of putting raw carboxyl nitrile rubber with the brand number of NX775 into an internal mixer (a tin-free Yangming rubber machinery factory, model number YM-35), internally mixing for 1 minute, adding white carbon black serving as a reinforcing agent (a tin-free Hengheng white carbon black finite responsibility company, the mesh number is 2000), continuously internally mixing for 2 minutes, putting rubber oil (dibutyl ester + silane coupling agent), antistatic agent (SN), vulcanization aid (zinc oxide + stearic acid), rubber protective agent (phenol antioxidant 2246+ active black + protective wax + anti-aging agent RD), continuously internally mixing, and discharging mixed rubber when the temperature reaches 120 ℃. Cooling the rubber material to 60 ℃, thinly passing the rubber material once in an open mill, adding a vulcanizing agent (sulfur +2, 2' -dithiodibenzothiazole DM + N-cyclohexyl-2-benzothiazole sulfenamide CZ), placing the rubber for 5 minutes in the open mill (tin-free Yangming rubber machinery factory, model YM-16), checking the section of the rubber sheet by a visual method, and preparing the mixed rubber with good dispersibility by taking a proper amount of the mixed rubber for preparing the adhesive A and using the mixed rubber without macroscopic non-dispersive chemical raw materials; and (3) rolling the mixed rubber on nylon lining cloth through a rolling mill (a rolling mill manufacturer, a stannless Shentong rubber machinery factory, model XY-3F) to obtain a rubber sheet with the thickness of 0.1mm, and rolling for later use.
(2) Preparation of the adhesive
a. Preparation of adhesive A (adhesive of upper rubber transmission layer or lower rubber friction layer and buffer layer TPU sheet)
3 parts of polyurethane TPU particles which are purchased from Basff brand 1185A10FHF and 5 parts of butanone which are used as organic solvent are dissolved and heated to 60 ℃ according to the mass ratio of 3 to 5, and are stirred and dissolved for 4 hours to obtain viscous liquid, and then the viscous liquid is mixed into the mixed rubber prepared in the step (1) according to the mass ratio of 4 to 1 to 0.5(4 parts of the liquid, 1 part of rubber and 0.5 part of methanol), and is stirred at the constant temperature of 60 ℃ for 4 hours. Then, a curing agent (the mark is Bayer N3390) accounting for 3 percent of the mass of the total solution and an emulsifier (the mark is OP-10 US Dow) accounting for 0.05 percent of the mass of the total solution are added, and the mixture is continuously stirred for 0.5 hour to prepare the adhesive A with the viscosity of 1500Pa.s (measured at the temperature of 40 ℃). (the total solution mass refers to the sum of the masses of viscous liquid, mixed rubber, methanol, curing agent and emulsifier).
b. Preparation of adhesive B (TPU sheet adhesive, TPU sheet for adhesive hardness 85A and 95A)
2 parts of FHF purchased from a Basff brand 1185A10 is heated to 60 ℃ by 5 parts of butanone organic solvent according to the mass ratio of 2: 5, stirred and dissolved for 4 hours, then a curing agent (the brand is Bayer N3390) accounting for 4.5 percent of the mass of the total solution and an emulsifier (the brand is OP-10 US Dow) accounting for 0.05 percent of the mass of the total solution are added, and the stirring is continued for 0.5 hour, so that an adhesive B with the viscosity of 1400Pa.s (measured at 40 ℃) is prepared. (the total solution mass refers to the sum of the mass of the polyurethane TPU particles, the butanone, the curing agent and the emulsifier)
(3) Adhesive coating
a. Coating framework cloth: the framework layer 300 is customized by industrial cloth Co., Ltd, of fabric manufacturers, Wujiang Fengyue, the length is 250 meters, the width is 580 millimeters, the thickness is 0.6 millimeter, the breaking strength is 190N/mm, a layer of adhesive B with the thickness of 0.05mm is respectively coated on the upper surface and the lower surface of the framework layer 300 cloth through a coating machine, the framework layer passes through an oven with the temperature of 80 ℃, the length of the oven is 4 meters, the belt speed during drying is 0.1 meter/second, and the framework layer is dried and wound for standby.
Coating of TPU sheet: a TPU sheet layer (first elastomer layer) with Shore hardness of 95A and thickness of 0.25mm (customized by Dongguan Xionglin new material science and technology Co., Ltd., brand number T-85A20), an adhesive B with thickness of 0.05mm is respectively coated on the upper surface and the lower surface of a TPU sheet layer (second elastomer layer) with hardness of 85A and thickness of 0.2mm (customized by Dongguan Xionglin new material science and technology Co., Ltd., brand number T-95A25), an adhesive B with thickness of 0.05mm is respectively coated on the lower surface of a TPU sheet layer (first elastomer layer) with Shore hardness of 95A and thickness of 0.25mm, an adhesive B with thickness of 0.05mm is respectively coated on the lower surface of a TPU sheet layer (second elastomer layer) with hardness of 85A and thickness of 0.2mm, and the TPU sheet layer (second elastomer layer) is isolated and rolled by a film paper for later use.
c. Coating of a covering layer: coating the lower surface of the upper rubber transmission layer prepared in the step (1) with an adhesive A through a coating machine, coating the upper surface of the lower rubber friction layer with the adhesive A, wherein the coating thickness is 0.05mm, passing through a 65 ℃ oven, the length of the oven is 4m, the belt moving speed during drying is 0.1 m/s, and the upper surface of the lower rubber friction layer is isolated and wound by using film paper for standby.
(4) Novel polyester tangential belt composition
a. Go up the compound last composite bed of rubber drive layer and last buffer layer:
compounding with a drum vulcanizer (DLG-700, Dalianhua rubber and plastic machinery Co., Ltd.), setting the drum temperature at 120 deg.C, the pressure at 8MPa, and the frequency of the main drum motor at 30 HZ. On the work or material rest of advancing the drum end, place from last to down in proper order: the upper rubber transmission layer 110 with the lower surface coated with an adhesive A, the first elastomer layer 201 without the adhesive, the second elastomer layer 202 with the upper surface and the lower surface coated with an adhesive B, the first elastomer layer 201 with the lower surface coated with an adhesive B and the second elastomer layer 202 without the adhesive are parallelly superposed and then are simultaneously sent to a drum vulcanizer, the layers are compounded under the action of the adhesive A and the adhesive B under the conditions of 120 ℃, 8MPa of pressure and 30HZ of main drum motor frequency, and are compounded together at a drum outlet end to obtain an upper compound layer, and the upper compound layer is wound for standby.
b. The lower rubber friction layer and the lower buffer layer are compounded to form a lower composite layer:
and compounding by a drum vulcanizer, wherein the drum temperature is set to 120 ℃, the pressure is 8MPa, and the frequency of a main drum motor is set to 30HZ before compounding. On the work or material rest of advancing the drum end, place from last to down in proper order: the method comprises the steps of coating a first elastic body layer 202 without adhesive, a first elastic body layer 201 with the upper surface and the lower surface coated with adhesive B, a second elastic body layer 202 with the lower surface coated with adhesive B, a first elastic body layer 201 without adhesive and a lower rubber friction layer 120 with the upper surface coated with adhesive A, parallelly superposing the two layers, simultaneously sending the superposed layers to a drum vulcanizer, compounding the layers at a drum outlet end under the action of the adhesive under the conditions of 120 ℃, 8MPa of pressure and 30HZ of main drum motor frequency to obtain a lower composite layer, and winding the lower composite layer for later use.
c. Compounding an upper compound layer, a lower compound layer and a middle framework layer:
placing an upper composite layer, a framework layer 300 with upper and lower surfaces coated with an adhesive B and a lower composite layer on a material rack at the drum inlet end in sequence, keeping the buffer layers of the upper and lower composite layers in a joint state with the framework layer 300, compounding under the action of the adhesive B coated on the upper and lower surfaces of the framework layer, and conveying the compound into a drum vulcanizer through a transmission roller for compounding, wherein the parameters during compounding are as follows: the drum temperature is 120 ℃, the pressure is 10MPa, the frequency of a main drum motor is 30HZ, the set frequency is the tape transport speed, after the compounding is finished at the drum outlet end, the novel polyester tangential belt semi-finished product is obtained, and the novel polyester tangential belt semi-finished product is wound for standby.
(5) Vulcanization of novel polyester tangential belt semi-finished product
Sending the semi-finished product of the vulcanized polyester belt into a flat plate vulcanizing machine (XLB-Q, Lianha rubber and plastic machinery Co., Ltd.), vulcanizing in a mold division mode according to the length of a flat plate mold, using the same vulcanizing process for each mold, wherein the vulcanizing temperature is 152 ℃, the vulcanizing pressure is 15MPa, the vulcanizing time is 20 minutes, and after the whole roll of vulcanization is finished, stripping the surface lining cloth of the upper rubber transmission layer 100 and the lower rubber friction layer 120 to obtain the novel polyester tangential belt finished product.
(6) Connected into an annular tangential belt
The connection process comprises the following steps:
cutting a polyester belt to a size required by a customer;
processing the two ends of the belt body into a seamless connection tooth shape by a special gear-making machine;
heating the flat plate splicer to 155 ℃, butting the head and the tail of the belt body according to the tooth shapes, placing the joint part between the lower heating plate and the middle heating plate of the splicer, stacking high-temperature paper on the upper surface and the lower surface of the belt body, placing fixed steel sheets with the same thickness as the belt body on the left side and the right side of the belt body, and closing the upper heating plate of the splicer. The pressure is set to be 0.25MPa, the heat preservation temperature is set to be 171 ℃, and the heat preservation time is 3 minutes. The heating button is pressed to start heating. After the temperature is raised to 171 ℃, the equipment automatically enters the heat preservation time;
fourthly, after the heat preservation is finished, the cooling pump is automatically started, and the belt body and the heating plate are cooled through the cooling circulating water. When the temperature is cooled to 50 ℃, the water pump is automatically stopped. And (5) releasing the pressure, and connecting the belt body which is completed, namely the annular polyester tangential belt.
The finished polyester tangential belt prepared in this example has 1% elongation strength and breaking strength, and the tensile strength and hardness change at the joint of the annular polyester tangential belt are shown in table 2.
Example 2
As shown in fig. 2, the novel polyester tangential belt in this embodiment sequentially comprises from top to bottom: the rubber friction layer comprises an upper rubber transmission layer 110, an upper buffer layer 210, a framework layer 300, a lower buffer layer 220 and a lower rubber friction layer 120, wherein the upper buffer layer comprises a second elastomer layer 202, a first elastomer layer 201, a second elastomer layer 202 and a first elastomer layer 201 from top to bottom in sequence, the first elastomer layer 201 is a TPU sheet layer with the hardness of 95A and the thickness of 0.25mm, and the second elastomer layer 202 is a TPU sheet layer with the hardness of 85A and the thickness of 0.05 mm; the lower buffer layer is sequentially provided with a first elastomer layer 201, a second elastomer layer 202, a first elastomer layer 201 and a second elastomer layer 202 from top to bottom, the first elastomer layer 201 is a TPU sheet layer with the hardness of 95A and the thickness of 0.25mm, and the second elastomer layer 202 is a TPU sheet layer with the hardness of 85A and the thickness of 0.05 mm; the framework layer 300 is polyester cloth with the thickness of 0.6mm, the requirement is +/-0.03 mm, the 1% stress at definite elongation is more than or equal to 17N/mm, and Wujiang Fengyue industrial cloth Co., Ltd; the upper rubber transmission layer 110 is an NX775 carboxyl nitrile rubber layer, and the thickness of the upper rubber transmission layer 110 is 0.13 mm; the lower rubber friction layer 120 is an NX775 carboxylated nitrile rubber layer, and the thickness of the lower rubber friction layer 120 is 0.13 mm.
In this embodiment, the ratio of the raw materials in the manufacturing process of the upper rubber transmission layer 110 and the lower rubber friction layer 120 is shown in table 1, the method for preparing the polyester tangential belt finished product and the method for connecting the polyester tangential belt into the annular tangential belt refer to embodiment 1, and the tensile strength at the joint of the annular polyester tangential belt, the hardness change at the joint of the polyester tangential belt prepared in this embodiment are shown in table 2.
Example 3
As shown in fig. 3, a novel polyester tangential belt sequentially comprises from top to bottom: the rubber friction layer comprises an upper rubber transmission layer 110, an upper buffer layer 210, a framework layer 300, an upper buffer layer 220 and a lower rubber friction layer 120, wherein the upper buffer layer comprises a first elastomer layer 201, a second elastomer layer 202, a first elastomer layer 201 and a second elastomer layer 202 from top to bottom in sequence, the first elastomer layer 201 is a TPU sheet layer with the hardness of 95A and the thickness of 0.25mm, and the second elastomer layer 202 is a TPU sheet layer with the hardness of 85A and the thickness of 0.15 mm; the lower buffer layer is sequentially provided with a first elastomer layer 201, a second elastomer layer 202, a first elastomer layer 201 and a second elastomer layer 202 from top to bottom, the first elastomer layer 201 is a TPU sheet layer with the hardness of 95A and the thickness of 0.25mm, and the second elastomer layer 202 is a TPU sheet layer with the hardness of 85A and the thickness of 0.15 mm; the framework layer 300 is polyester cloth with the thickness of 0.75mm, the requirement is +/-0.03 mm, the 1% stress at definite elongation is more than or equal to 17N/mm, and Wujiang Fengyue industrial cloth Co., Ltd; the upper rubber transmission layer 110 is an NX775 carboxyl nitrile rubber layer, and the thickness of the upper rubber transmission layer 110 is 0.13 mm; the lower rubber friction layer 120 is an NX775 carboxyl nitrile rubber layer, and the thickness of the upper rubber transmission layer 120 is 0.13 mm.
In this embodiment, the ratio of the raw materials in the manufacturing process of the upper rubber transmission layer 110 and the lower rubber friction layer 120 is shown in table 1, the method for preparing the polyester tangential belt finished product and the method for connecting the polyester tangential belt into the annular tangential belt refer to embodiment 1, and the tensile strength at the joint of the annular polyester tangential belt, the hardness change at the joint of the polyester tangential belt prepared in this embodiment are shown in table 2.
Example 4
As shown in fig. 4, a novel polyester tangential belt sequentially comprises from top to bottom: the rubber friction layer comprises an upper rubber transmission layer 110, an upper buffer layer 210, a framework layer 300, an upper buffer layer 220 and a lower rubber friction layer 120, wherein the upper buffer layer comprises a second elastomer layer 202, a first elastomer layer 201, a second elastomer layer 202 and a first elastomer layer 201 from top to bottom in sequence, the first elastomer layer 201 is a TPU sheet layer with the hardness of 95A and the thickness of 0.3mm, and the second elastomer layer 202 is a TPU sheet layer with the hardness of 85A and the thickness of 0.15 mm; the lower buffer layer is sequentially provided with a second elastomer layer 202, a first elastomer layer 201, a second elastomer layer 202 and a first elastomer layer 201 from top to bottom, the first elastomer layer 201 is a TPU sheet layer with the hardness of 95A and the thickness of 0.3mm, and the second elastomer layer 202 is a TPU sheet layer with the hardness of 85A and the thickness of 0.15 mm; the framework layer 300 is polyester cloth with the thickness of 0.75mm, the requirement is +/-0.03 mm, the 1% stress at definite elongation is more than or equal to 17N/mm, and Wujiang Fengyue industrial cloth Co., Ltd; the upper rubber transmission layer 110 is an NX775 carboxyl nitrile rubber layer, and the thickness of the upper rubber transmission layer 110 is 0.1 mm; the lower rubber friction layer 120 is an NX775 carboxyl nitrile rubber layer, and the thickness of the upper rubber transmission layer 120 is 0.1 mm.
In this embodiment, the ratio of the raw materials in the manufacturing process of the upper rubber transmission layer 110 and the lower rubber friction layer 120 is shown in table 1, the method for preparing the polyester tangential belt finished product and the method for connecting the polyester tangential belt into the annular tangential belt refer to embodiment 1, and the tensile strength at the joint of the annular polyester tangential belt, the hardness change at the joint of the polyester tangential belt prepared in this embodiment are shown in table 2.
Comparative example 1
Selecting a polyester belt of Habasit TC-35/30ER in Switzerland, from top to bottom: the thickness of each layer is shown in table 2, wherein the thermoplastic elastomer buffer layer is TPU with the hardness of 95A and the thickness of 0.9 mm.
When the linear polyester belt is connected into an annular belt, the two ends of the belt body are processed into saw teeth which can be in seamless butt joint by a gear making machine, the length of each tooth is generally 90mm, the joint of the well-spliced tooth-shaped belt is subjected to high temperature of 165 ℃, the pressure is 2MPa, the time is 3min, and then the temperature is reduced and the belt is cooled to the room temperature.
Comparative example 1 the strength and hardness properties at the polyester belt and endless polyester tangential belt joints are shown in table 2.
Data can see from table 2 in, the utility model discloses the intensity of the polyester tangential belt area body of preparation is almost unchangeable, but joint department intensity promotes obviously, and the hardness change of joint department is littleer, and it is better to connect the compliance. TABLE 1
TABLE 2
Claims (6)
1. The polyester tangential belt with the long service life is characterized by comprising an upper rubber transmission layer, an upper buffer layer, a framework layer, a lower buffer layer and a lower rubber friction layer which are sequentially adhered from top to bottom, wherein the upper buffer layer comprises at least one group of first elastomer layer and second elastomer layer which are sequentially adhered from top to bottom or at least one group of second elastomer layer and first elastomer layer which are sequentially adhered from top to bottom; the lower buffer layer comprises at least one group of first elastomer layers and second elastomer layers which are sequentially adhered from top to bottom or at least one group of second elastomer layers and first elastomer layers which are sequentially adhered from top to bottom;
the upper rubber transmission layer and the lower rubber friction layer are all carboxyl nitrile rubber layers; the first elastomer layer in the upper buffer layer and the lower buffer layer is a TPU sheet layer with the hardness of 95A and the thickness of 0.15-0.4 mm, and the second elastomer layer is a TPU sheet layer with the hardness of 85A and the thickness of 0.05-0.2 mm; the framework layer is made of polyester cloth, and the 1% stress at definite elongation is more than or equal to 30N/mm.
2. The polyester tangential belt with high service life according to claim 1, wherein the upper buffering layer comprises a first elastomer layer, a second elastomer layer, a first elastomer layer and a second elastomer layer which are sequentially adhered from top to bottom; the lower buffer layer comprises a second elastomer layer, a first elastomer layer, a second elastomer layer and a first elastomer layer which are sequentially adhered from top to bottom.
3. The polyester tangential belt with high service life according to claim 1, wherein the upper buffering layer comprises a second elastomer layer, a first elastomer layer, a second elastomer layer and a first elastomer layer which are sequentially adhered from top to bottom; the lower buffer layer comprises a first elastomer layer, a second elastomer layer, a first elastomer layer and a second elastomer layer which are sequentially adhered from top to bottom.
4. The polyester tangential belt with high service life according to claim 1, wherein the upper buffering layer comprises a first elastomer layer, a second elastomer layer, a first elastomer layer and a second elastomer layer which are sequentially adhered from top to bottom; the lower buffer layer comprises a first elastomer layer, a second elastomer layer, a first elastomer layer and a second elastomer layer which are sequentially adhered from top to bottom.
5. The polyester tangential belt with high service life according to claim 1, wherein the upper buffering layer comprises a second elastomer layer, a first elastomer layer, a second elastomer layer and a first elastomer layer which are sequentially adhered from top to bottom; the lower buffer layer comprises a second elastomer layer, a first elastomer layer, a second elastomer layer and a first elastomer layer which are sequentially adhered from top to bottom.
6. The polyester tangential belt with high service life according to any one of claims 1 to 5, wherein the thickness of the upper rubber transmission layer in the polyester tangential belt structure is 0.1 to 0.15mm, the thickness of the first elastomer layer in the upper and lower buffering layers is 0.15 to 0.4mm, the thickness of the second elastomer layer is 0.05 to 0.2mm, the thickness of the skeleton layer is 0.6 to 0.75mm, and the thickness of the lower rubber friction layer is 0.1 to 0.15 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109968764A (en) * | 2019-03-27 | 2019-07-05 | 江阴市斯强传动科技有限公司 | A kind of polyester tengential belt and its manufacturing method with high service life |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109968764A (en) * | 2019-03-27 | 2019-07-05 | 江阴市斯强传动科技有限公司 | A kind of polyester tengential belt and its manufacturing method with high service life |
| CN109968764B (en) * | 2019-03-27 | 2023-07-14 | 江阴市斯强传动科技有限公司 | Polyester tangential belt with long service life and manufacturing method thereof |
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