CN114813474A - Method and equipment for pre-crosslinking of electron irradiation carcass cord fabric based on Mooney viscosity test - Google Patents
Method and equipment for pre-crosslinking of electron irradiation carcass cord fabric based on Mooney viscosity test Download PDFInfo
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- CN114813474A CN114813474A CN202210357906.3A CN202210357906A CN114813474A CN 114813474 A CN114813474 A CN 114813474A CN 202210357906 A CN202210357906 A CN 202210357906A CN 114813474 A CN114813474 A CN 114813474A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/14—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by using rotary bodies, e.g. vane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0866—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0866—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation
- B29C2035/0877—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation using electron radiation, e.g. beta-rays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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Abstract
The application belongs to the technical field of tire production control, and particularly relates to a method and equipment for testing pre-crosslinking of an electron irradiation tire body cord fabric by using a differential scanning calorimeter. A method for testing pre-crosslinking of an electron irradiation carcass cord based on Mooney viscosity comprises the following steps: 1) separating the cord from the rubber material of the carcass cord fabric coated with the rubber, and taking the rubber material on the front side and the back side; 2) respectively carrying out Mooney viscosity tester analysis on the rubber materials on the front side and the back side; 3) and comparing the Mooney value results of the rubber materials on the front side and the back side, and judging that the tire cord fabric of the tire cord fabric subjected to electronic irradiation is successfully pre-crosslinked if the Mooney value difference value of the rubber materials on the front side and the back side is 10-20. The invention has simple test process and digitalized result. By the design of the invention, the simplicity and convenience of the testing method are obviously improved, and the condition that whether the tire body cord fabric subjected to electronic irradiation is successfully pre-crosslinked or not is easier to judge by factory field process personnel on the testing result is ensured.
Description
Technical Field
The invention belongs to the technical field of tire production control, and particularly relates to a method and equipment for pre-crosslinking an electron irradiation tire cord fabric based on a Mooney viscosity test.
Background
The automobile industry is rapidly developed in the world, and automobile tires are important components of vehicles, and the quality and performance of the automobile tires directly affect the performance of the vehicles. The radial tire body ply is a tire body layer consisting of rubber-coated cord fabrics and is a stressed framework layer of the tire. The radial ply tire is divided according to the carcass framework material, the carcass is a steel wire called an all-steel tire and is generally used for commercial heavy-duty tires; the carcass is a fibrous semi-steel tire, which is generally used for passenger tires.
The tire for passenger cars in the market at present has poor operability and large rolling resistance, and a tire body cord fabric with higher fatigue resistance and strength is urgently needed to meet the requirements of semi-steel radial car tires. At present, electron irradiation is carried out during tire body cord fabric calendering of semi-steel radial car tires in the market, pre-crosslinking treatment is carried out on rubber materials, adhesion between the cord fabric and an inner liner is improved, and high fatigue resistance and strength are obtained.
The Chinese invention patent application (publication number: CN109291339A, application publication date: 20190201) applied by the applicant discloses a method for changing the performance of a rubber-covered cord fabric by adopting electron irradiation, which comprises the following steps: the fiber cord fabric enters an electron irradiation area of a double-window electron irradiation device, wherein the parameters of the double-window electron irradiation device are 500KV voltage and 40KGY dose, and the irradiation dose fluctuation is less than 5%. The stability of the electronic irradiation parameters directly influences the quality of the tire fiber cord fabric, and the Chinese patent application (publication number: CN111376509A, application publication date: 20200707) applied by the applicant needs to identify the tire fiber cord fabric for the abnormal irradiation dose of the tire fiber cord fabric caused by special reasons, so that the subsequent isolation treatment of the abnormal tire fiber cord fabric is facilitated.
In the patent (application publication No. CN114235607A, application publication date: 2022.03.25) applied in the earlier period, the invention discloses an evaluation method of pre-crosslinking of a carcass cord fabric rubber compound, which plots the elastic modulus and the viscous modulus obtained by strain scanning of a rubber processing analyzer against the change of strain, a curve not only can show the magnitude of the modulus, but also can visually distinguish the elastic modulus and the viscous modulus of the rubber compound, and the pre-crosslinking rate of the carcass cord fabric subjected to electronic irradiation is deduced according to the area of the curve. The invention directly provides a calculation method for detecting the pre-crosslinking degree of a tire cord fabric, but the method has the following defects: (1) the method is suitable for laboratory detection and analysis, but is not suitable for engineering field technicians to judge whether the tire cord is successfully crosslinked; (2) the test method needs further optimization.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a method for testing pre-crosslinking of an electron irradiation carcass cord fabric based on Mooney viscosity, the testing process is simple and the result is digital. By the design of the invention, the simplicity and convenience of the testing method are obviously improved, and the condition that whether the tire body cord fabric subjected to electronic irradiation is successfully pre-crosslinked or not is easier to judge by factory field process personnel on the testing result is ensured.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for testing pre-crosslinking of an electron irradiation carcass cord based on Mooney viscosity comprises the following steps:
1) separating the cord from the rubber material of the carcass cord fabric coated with the rubber, and taking the rubber material on the front side and the back side;
2) respectively carrying out Mooney viscosity tester analysis on the rubber materials on the front side and the back side;
3) and comparing the Mooney value results of the rubber materials on the front side and the back side, and judging that the tire cord fabric of the tire cord fabric subjected to electronic irradiation is successfully pre-crosslinked if the Mooney value difference value of the rubber materials on the front side and the back side is 10-20.
Preferably, the parameters of use for the mooney viscometer analysis include: the detection temperature is 80-120 ℃, and the temperature fluctuation range is +/-0.3 ℃; the rotating speed of the rotor is 2 +/-0.02 r/min; preheating time is 1min, and testing time is 4 min.
Preferably, the Mooney value difference between the rubber on the front side and the rubber on the back side is 12-18.
Preferably, the rubber material in the carcass cord fabric contains natural rubber, and the weight average molecular weight Mw needs to satisfy the following range: mw is more than 120 ten thousand and less than 270 ten thousand; the natural rubber is used in 80-100 parts by weight based on 100 parts by weight of rubber in the rubber material.
Furthermore, the invention also discloses a method for controlling pre-crosslinking of the electron irradiation tire cord fabric based on the Mooney viscosity, the method collects the Mooney values of the rubber materials on the front side and the back side through a Mooney viscosity tester, and the tire cord fabric of the tire cord fabric subjected to the electron irradiation is judged to be successfully pre-crosslinked through the difference value of the Mooney values of the rubber materials on the front side and the back side being 10-20; and if the Mooney value difference value is within the range of 10-20, adjusting the work of the electronic irradiation tube on the tire body cord fabric calendering site through the output value.
Further, the invention also discloses a device for controlling pre-crosslinking of the electron irradiation tire cord fabric based on the Mooney viscosity, the device comprises a Mooney viscosity tester and a control system, the control system collects the data of the Mooney viscosity tester, and the tire cord fabric of the tire cord fabric subjected to the electron irradiation is judged to be successfully pre-crosslinked through the Mooney value difference of rubber materials on the front side and the back side of the tire cord fabric in the range of 10-20; and if the Mooney value difference is within the range of 10-20, adjusting the work of the electronic irradiation tube on the tire body cord fabric calendering site through the output value.
Further, the present invention also discloses a computer device comprising a memory, a processor and a computer program stored on the memory, wherein the processor executes the computer program to realize the following method: collecting the Mooney values of the rubber materials on the front side and the back side, and judging that the tire cord fabric of the tire cord fabric subjected to electron irradiation is successfully pre-crosslinked if the difference value of the Mooney values of the rubber materials on the front side and the back side is 10-20; and if the Mooney value difference is within the range of 10-20, adjusting the work of the electronic irradiation tube on the tire body cord fabric calendering site through the output value.
Further, the present invention also discloses a computer readable storage medium having stored thereon a computer program or instructions which, when executed by a processor, implement the method of: collecting the Mooney values of the rubber materials on the front side and the back side, and judging that the tire cord fabric of the tire cord fabric subjected to electronic irradiation is successfully pre-crosslinked if the difference value of the Mooney values of the rubber materials on the front side and the back side is 10-20; and if the Mooney value difference is within the range of 10-20, adjusting the work of the electronic irradiation tube on the tire body cord fabric calendering site through the output value.
Further, the invention also discloses a computer program product comprising a computer program or instructions which, when executed by a processor, implement the method of: collecting the Mooney values of the rubber materials on the front side and the back side, and judging that the tire cord fabric of the tire cord fabric subjected to electronic irradiation is successfully pre-crosslinked if the difference value of the Mooney values of the rubber materials on the front side and the back side is 10-20; and if the Mooney value difference is within the range of 10-20, adjusting the work of the electronic irradiation tube on the tire body cord fabric calendering site through the output value.
By adopting the technical scheme, the invention uses a Mooney test to characterize the fluidity of the tire cord rubber material subjected to electron irradiation after rubber coating and the fluidity of the tire cord rubber material not subjected to electron irradiation after rubber coating, and can obviously distinguish whether electron irradiation is successfully pre-crosslinked or not. The invention has simple test process and digitalized result. By the design of the invention, the simplicity and convenience of the testing method are obviously improved, and the condition that whether the tire body cord fabric subjected to electronic irradiation is successfully pre-crosslinked or not is easier to judge by factory field process personnel on the testing result is ensured.
Drawings
FIG. 1 is a schematic view of an electron irradiation curtain fabric, wherein the front side of the curtain fabric is the side of the curtain fabric subjected to electron irradiation, and the back side of the curtain fabric is the side not subjected to electron irradiation.
Detailed Description
The technical solutions in the embodiments of the present invention will be examined and completely described below with reference to the embodiments of the present invention, so as to further explain the invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. Given the embodiments of the present invention, all other embodiments that can be obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present invention.
The rubber material in the tire body cord fabric contains natural rubber, and the weight average molecular weight Mw needs to meet the following requirements: mw is more than 120 ten thousand and less than 270 ten thousand; the natural rubber is used in 80-100 parts by weight based on 100 parts by weight of rubber in the rubber material.
The invention provides a method for analyzing pre-crosslinking of a carcass cord fabric rubber compound by using a Mooney viscosity tester, which comprises the following steps: the method for performing the Mooney detection surface treatment on the rubber-coated tire cord fabric by putting the treated rubber material into a Mooney detection machine comprises the following steps: separating the cord from the rubber material of the tire body cord fabric coated with the rubber, and distinguishing the rubber material on the front side and the back side, namely the electron irradiation side and the non-electron irradiation side; the tire body cord fabric which is not subjected to electronic irradiation after being coated with the rubber has no distinction.
The parameters used for analysis by the Mooney viscometer of the invention include: the detection temperature is 80-120 ℃, and the temperature fluctuation range is +/-0.3 ℃; the rotating speed of the rotor is 2 +/-0.02 r/min; preheating time is 1min, and testing time is 4 min.
The comparative examples and examples 1 to 5 are shown in tables 1 and 2 below.
TABLE 1 differences in Mooney values of examples 1 to 5
TABLE 2 differences in Mooney values of comparative examples 1-2
Tables 1 and 2 show the Mooney test results of different tire cord fabric rubber formulations on different specifications of cord fabric electron irradiation and non-electron irradiation rubber. In the examples, the Mooney values are obviously different, which indicates that the flowability of the electron irradiation cord fabric rubber is obviously poor, and the electron irradiation generates slight cross-linking on the surface of the rubber to influence the flowability of the rubber. The Mooney characterization result has a trend equivalent to that of a comparative example, and the Mooney results of the rubber material subjected to electron irradiation and non-electron irradiation have obvious positive significance on the control of the electron irradiation on the calendering site.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, including any reference to the above-mentioned embodiments. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A method for testing pre-crosslinking of an electron irradiation carcass cord based on Mooney viscosity is characterized by comprising the following steps:
1) separating the cord from the rubber material of the carcass cord fabric coated with the rubber, and taking the rubber material on the front side and the back side;
2) respectively carrying out Mooney viscosity tester analysis on the rubber materials on the front side and the back side;
3) and comparing the Mooney value results of the rubber materials on the front side and the back side, and judging that the tire cord fabric of the tire cord fabric subjected to electronic irradiation is successfully pre-crosslinked if the Mooney value difference value of the rubber materials on the front side and the back side is 10-20.
2. A method of electron irradiation carcass ply pre-crosslinking based on the mooney viscosity test according to claim 1, characterized in that the mooney viscosity tester analyzed use parameters comprise: the detection temperature is 80-120 ℃, and the temperature fluctuation range is +/-0.3 ℃; the rotating speed of the rotor is 2 +/-0.02 r/min; preheating time is 1min, and testing time is 4 min.
3. A method of pre-crosslinking electron irradiated carcass cords based on the Mooney viscosity test according to claim 1, characterized in that the difference of Mooney values of the right and left side compounds is 12-18.
4. A method for pre-crosslinking of electron-irradiated carcass cords according to any one of claims 1 to 3, characterized in that the carcass cord comprises natural rubber and the weight-average molecular weight Mw is within the following range: mw is more than 120 ten thousand and less than 270 ten thousand; the natural rubber is used in 80-100 parts by weight based on 100 parts by weight of rubber in the rubber material.
5. A method for controlling pre-crosslinking of an electron irradiation tire cord fabric based on Mooney viscosity is characterized in that the method collects the Mooney values of rubber materials on the front side and the back side through a Mooney viscosity tester, and judges that the tire cord fabric of the tire cord fabric subjected to electron irradiation is successfully pre-crosslinked through the difference value of the Mooney values of the rubber materials on the front side and the back side being 10-20; and if the Mooney value difference is within the range of 10-20, adjusting the work of the electronic irradiation tube on the tire body cord fabric calendering site through the output value.
6. The equipment for controlling the pre-crosslinking of the electronically irradiated tire cord fabric based on the Mooney viscosity is characterized by comprising a Mooney viscosity tester and a control system, wherein the control system acquires data of the Mooney viscosity tester, and judges that the tire cord fabric of the tire cord fabric subjected to the electronic irradiation is successfully pre-crosslinked if the Mooney value difference value of rubber materials on the front side and the back side is 10-20; and if the Mooney value difference is within the range of 10-20, adjusting the work of the electronic irradiation tube on the tire body cord fabric calendering site through the output value.
7. A computer device comprising a memory, a processor, and a computer program stored on the memory, wherein the processor executes the computer program to implement a method comprising: collecting the Mooney values of the rubber materials on the front side and the back side, and judging that the tire cord fabric of the tire cord fabric subjected to electronic irradiation is successfully pre-crosslinked if the difference value of the Mooney values of the rubber materials on the front side and the back side is 10-20; and if the Mooney value difference is within the range of 10-20, adjusting the work of the electronic irradiation tube on the tire body cord fabric calendering site through the output value.
8. A computer-readable storage medium on which a computer program or instructions are stored, the computer program or instructions, when executed by a processor, implementing a method of: collecting the Mooney values of the rubber materials on the front side and the back side, and judging that the tire cord fabric of the tire cord fabric subjected to electronic irradiation is successfully pre-crosslinked if the difference value of the Mooney values of the rubber materials on the front side and the back side is 10-20; and if the Mooney value difference is within the range of 10-20, adjusting the work of the electronic irradiation tube on the tire body cord fabric calendering site through the output value.
9. A computer program product comprising a computer program or instructions, characterized in that the computer program or instructions, when executed by a processor, implement the method of: collecting the Mooney values of the rubber materials on the front side and the back side, and judging that the tire cord fabric of the tire cord fabric subjected to electronic irradiation is successfully pre-crosslinked if the difference value of the Mooney values of the rubber materials on the front side and the back side is 10-20; and if the Mooney value difference is within the range of 10-20, adjusting the work of the electronic irradiation tube on the tire body cord fabric calendering site through the output value.
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| CN202210357906.3A CN114813474B (en) | 2022-04-06 | 2022-04-06 | Method and equipment for pre-crosslinking of electron irradiation carcass cord fabric based on Mooney viscosity test |
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| WO2008071208A1 (en) * | 2006-12-13 | 2008-06-19 | Pirelli Tyre S.P.A. | Tire and crosslinkable elastomeric composition |
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| CN111707592A (en) * | 2020-05-22 | 2020-09-25 | 中策橡胶集团有限公司 | Method for measuring permeability of sizing material after electronic irradiation of tire fiber cord fabric |
| CN114235607A (en) * | 2021-11-12 | 2022-03-25 | 中策橡胶集团股份有限公司 | Method and equipment for evaluating pre-crosslinking of carcass cord fabric rubber compound and computer readable carrier medium |
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| WO2008071208A1 (en) * | 2006-12-13 | 2008-06-19 | Pirelli Tyre S.P.A. | Tire and crosslinkable elastomeric composition |
| WO2018130196A1 (en) * | 2017-01-13 | 2018-07-19 | 杭州星庐科技有限公司 | Rubber composite, applications in foamed product, and manufacturing method |
| CN111707592A (en) * | 2020-05-22 | 2020-09-25 | 中策橡胶集团有限公司 | Method for measuring permeability of sizing material after electronic irradiation of tire fiber cord fabric |
| CN114235607A (en) * | 2021-11-12 | 2022-03-25 | 中策橡胶集团股份有限公司 | Method and equipment for evaluating pre-crosslinking of carcass cord fabric rubber compound and computer readable carrier medium |
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