CN114813474B - 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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- CN114813474B CN114813474B CN202210357906.3A CN202210357906A CN114813474B CN 114813474 B CN114813474 B CN 114813474B CN 202210357906 A CN202210357906 A CN 202210357906A CN 114813474 B CN114813474 B CN 114813474B
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- electron irradiation
- mooney
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- carcass ply
- electron
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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
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The application belongs to the technical field of tire production control, and particularly relates to a method and equipment for testing electron irradiation carcass ply pre-crosslinking by using a differential scanning calorimeter. A method for pre-crosslinking an electron-irradiated carcass ply based on a mooney viscosity test, the method comprising the steps of: 1) Separating the cord from the rubber material of the carcass cord after the rubber coating, and taking the rubber materials on the positive side and the negative side; 2) Respectively analyzing the sizing materials on the front side and the back side by a Mooney viscosity tester; 3) And comparing the Mooney value results of the rubber materials at the front side and the back side, and judging that the carcass ply is successfully pre-crosslinked after the carcass ply is subjected to electron irradiation if the Mooney value difference value of the rubber materials at the front side and the back side is 10-20. The invention simplifies the testing process and digitizes the result. By the design of the invention, the simplicity and convenience of a testing method are obviously improved, and whether the carcass ply subjected to electron irradiation is successfully pre-crosslinked or not is ensured to be easier to judge by field technicians of factories on test results.
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 carcass cord fabric based on a Mooney viscosity test.
Background
The automotive industry is rapidly developing worldwide, and automobile tires are an important component of vehicles, and the quality and performance of the tires directly affect the performance of the vehicles. The radial tire carcass ply is a carcass layer composed of rubber-covered tyre cord fabric and is a stressed framework layer of the tire. Radial tires are classified according to carcass framework materials, and the carcass is a steel wire, called all-steel tire, and is generally used for commercial heavy duty tires; the carcass is a fibrous semi-steel tire, commonly used for passenger tires.
The passenger car tires in the current market have poor operability and large rolling resistance, and a carcass ply with higher fatigue resistance and strength is urgently needed to meet the requirements of semi-steel radial car tires. The carcass ply of the semisteel radial car tire in the market at present is subjected to electron irradiation in a delayed time, and the glue stock is subjected to pre-crosslinking treatment to improve the adhesion between the ply and the inner liner, so that higher fatigue resistance and strength are obtained.
The Chinese patent application (publication No. CN109291339A, publication No. 20190201) of the applicant discloses a method for changing the performance of a rubberized fabric by electron irradiation, comprising the steps of: the fiber curtain cloth enters an electron irradiation area of a double-window electron irradiation device, wherein parameters of the double-window electron irradiation device are voltage 500KV and dose 40KGY, and irradiation dose fluctuation is less than 5%. The stability of the electron irradiation parameters directly influences the quality of the tire fiber curtain cloth, and the tire fiber curtain cloth needs to be marked for the abnormal irradiation dose of the tire fiber curtain cloth generated by special reasons according to the Chinese patent application (publication number: CN111376509A, application publication date: 20200707) filed by the applicant, thereby being beneficial to the subsequent isolation treatment of the abnormal tire fiber curtain cloth.
In the prior application (application publication number: CN114235607A, application publication date: 2022.03.25), an evaluation method for pre-crosslinking of a tire cord fabric is invented, the elastic modulus and the viscous modulus obtained by strain scanning of a rubber processing analyzer are plotted against strain change, a curve can not only reflect the magnitude of the modulus, but also intuitively distinguish the elastic modulus and the viscous modulus of the tire cord fabric, and the pre-crosslinking rate of the tire cord fabric after electron irradiation is deduced according to the curve area. The invention directly provides a calculation method for detecting the pre-crosslinking degree of the carcass ply, however, 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 carcass ply is successfully crosslinked; (2) the test method requires further optimization.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a method for pre-crosslinking an electron irradiation carcass ply based on a Mooney viscosity test, which has the advantages of simplified test process and digitalized result. By the design of the invention, the simplicity and convenience of a testing method are obviously improved, and whether the carcass ply subjected to electron irradiation is successfully pre-crosslinked or not is ensured to be easier to judge by field technicians of factories on test results.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a method for pre-crosslinking an electron-irradiated carcass ply based on a mooney viscosity test, the method comprising the steps of:
1) Separating the cord from the rubber material of the carcass cord after the rubber coating, and taking the rubber materials on the positive side and the negative side;
2) Respectively analyzing the sizing materials on the front side and the back side by a Mooney viscosity tester;
3) And comparing the Mooney value results of the rubber materials at the front side and the back side, and judging that the carcass ply is successfully pre-crosslinked after the carcass ply is subjected to electron irradiation if the Mooney value difference value of the rubber materials at the front side and the back side is 10-20.
Preferably, the usage parameters analyzed by the mooney viscosity tester include: detecting the temperature to be 80-120 ℃ and the temperature fluctuation range to be +/-0.3 ℃; rotor speed is 2+/-0.02 r/min; preheating time is 1min, and testing time is 4min.
Preferably, the Mooney value difference of the sizing materials on the front side and the back side is 12-18.
Preferably, the rubber material in the carcass ply comprises natural rubber, and the weight average molecular weight Mw needs to satisfy the range: 120 ten thousand < Mw < 270 ten thousand; the natural rubber is used in 80-100 parts by weight based on 100 parts by weight of rubber in the sizing material.
The invention further discloses a method for controlling the pre-crosslinking of the electron irradiation carcass ply based on the Mooney viscosity, which comprises the steps of collecting the Mooney values of the rubber materials at the front side and the back side through a Mooney viscosity tester, and judging that the carcass ply subjected to the electron irradiation is successfully pre-crosslinked if the difference value of the Mooney values of the rubber materials at the front side and the back side is 10-20; and if the difference value of the Mooney value is beyond the range of 10-20, regulating the work of the tire cord calendering site electron irradiation tube by outputting a numerical value.
The invention further discloses a device for controlling the pre-crosslinking of the electron irradiation carcass ply based on the Mooney viscosity, which comprises a Mooney viscosity tester and a control system, wherein the control system collects data of the Mooney viscosity tester, and judges that the carcass ply subjected to the electron irradiation is successfully pre-crosslinked by the Mooney value difference value of sizing materials on the front side and the back side is 10-20; and if the difference value of the Mooney value is beyond the range of 10-20, regulating the work of the tire cord calendering site electron irradiation tube by outputting a numerical value.
Further, the 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 sizing materials at the front side and the back side, and judging that the carcass ply is successfully pre-crosslinked after the carcass ply is subjected to the electron irradiation through the Mooney value difference value of the sizing materials at the front side and the back side being 10-20; and if the difference value of the Mooney value is beyond the range of 10-20, regulating the work of the tire cord calendering site electron irradiation tube by outputting a numerical 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, performs the following method: collecting the Mooney values of the sizing materials at the front side and the back side, and judging that the carcass ply is successfully pre-crosslinked after the carcass ply is subjected to the electron irradiation through the Mooney value difference value of the sizing materials at the front side and the back side being 10-20; and if the difference value of the Mooney value is beyond the range of 10-20, regulating the work of the tire cord calendering site electron irradiation tube by outputting a numerical 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 sizing materials at the front side and the back side, and judging that the carcass ply is successfully pre-crosslinked after the carcass ply is subjected to the electron irradiation through the Mooney value difference value of the sizing materials at the front side and the back side being 10-20; and if the difference value of the Mooney value is beyond the range of 10-20, regulating the work of the tire cord calendering site electron irradiation tube by outputting a numerical value.
By adopting the technical scheme, the fluidity of the carcass ply compound subjected to electron irradiation after glue coating and the fluidity of the carcass ply compound not subjected to electron irradiation after glue coating are characterized by using a Mooney test, so that whether the electron irradiation is successful in pre-crosslinking can be obviously distinguished. The invention simplifies the testing process and digitizes the result. By the design of the invention, the simplicity and convenience of a testing method are obviously improved, and whether the carcass ply subjected to electron irradiation is successfully pre-crosslinked or not is ensured to be easier to judge by field technicians of factories on test results.
Drawings
FIG. 1 is a schematic view of an electron irradiated curtain, wherein the front side of the curtain is the side of the curtain subjected to electron irradiation, and the back side of the curtain is the side not subjected to electron irradiation.
Detailed Description
The technical scheme in the embodiment of the invention is checked and fully described in combination with the embodiment of the invention, and the invention is further explained. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. Given the embodiments of the present invention, all other embodiments that would be obvious to one of ordinary skill in the art without making any inventive effort are within the scope of the present invention.
The rubber material in the carcass ply of the invention contains natural rubber, and the weight average molecular weight Mw needs to satisfy the range: 120 ten thousand < Mw < 270 ten thousand; the natural rubber is used in 80-100 parts by weight based on 100 parts by weight of rubber in the sizing material.
The invention provides a method for analyzing pre-crosslinking of a carcass ply compound by using a Mooney viscosity tester, which comprises the following steps: the surface treatment of the carcass ply after the coating is not carried out, and the treated sizing material is put into a Mooney detection machine for carrying out the Mooney detection surface treatment method comprises the following steps: separating the cord from the rubber material of the carcass cord after the rubber coating, and distinguishing the rubber materials on the front side and the back side, namely an electron irradiation side and a non-electron irradiation side; the carcass ply which is not irradiated by electrons after the glue coating is not distinguished.
The parameters used for analysis of the Mooney viscosity tester of the invention include: detecting the temperature to be 80-120 ℃ and the temperature fluctuation range to be +/-0.3 ℃; rotor speed is 2+/-0.02 r/min; preheating time is 1min, and testing time is 4min.
Comparative examples and examples 1 to 5 are shown in tables 1 and 2 below.
TABLE 1 differentiation of Mooney values from examples 1-5
TABLE 2 differentiation of Mooney values for comparative examples 1-2
Tables 1 and 2 show the results of mooney tests of different carcass ply compound formulations for ply electron irradiated and non-electron irradiated compounds of different specifications. In the examples, the Mooney has a significant numerical difference, which indicates that the fluidity of the electron-irradiated cord fabric rubber material is significantly deteriorated, and the electron irradiation produces a slight cross-linking on the surface of the rubber material, which affects the fluidity of the rubber material. The trend of the Mooney characterization result is equivalent to that of a comparative example, and the Mooney result of the rubber material subjected to the electron irradiation and the non-electron irradiation has obvious positive significance on the management and control of the electron irradiation on a calendaring 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. Various modifications to these embodiments will be readily apparent to those skilled in the art. The generic principles defined herein may be applied to 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 pre-crosslinking an electron irradiation carcass ply based on a mooney viscosity test, which is characterized by comprising the following steps:
1) Separating the cord from the rubber material of the carcass cord after the rubber coating, and taking an electron irradiation side and a non-electron irradiation side;
2) Respectively analyzing the electron irradiation side and the non-electron irradiation side by a Mooney viscosity tester;
3) And comparing the Mooney value results of the electron irradiation side and the non-electron irradiation side, and judging that the carcass ply is successfully pre-crosslinked after the electron irradiation if the Mooney value difference value of the electron irradiation side and the non-electron irradiation side is 10-20.
2. A method of pre-crosslinking an electron-irradiated carcass ply based on a mooney viscosity test as claimed in claim 1, wherein the usage parameters analyzed by the mooney viscosity tester include: detecting the temperature to be 80-120 ℃ and the temperature fluctuation range to be +/-0.3 ℃; rotor speed is 2+/-0.02 r/min; preheating time is 1min, and testing time is 4min.
3. The method for pre-crosslinking an electron-irradiated carcass ply based on a Mooney viscosity test according to claim 1, wherein the difference in Mooney values between the electron-irradiated side and the non-electron-irradiated side is 12 to 18.
4. A method according to any one of claims 1-3, wherein the matrix comprises natural rubber and the weight average molecular weight Mw is in the range: 120 ten thousand < Mw < 270 ten thousand; the natural rubber is used in 80-100 parts by weight based on 100 parts by weight of rubber in the sizing material.
5. A method for controlling pre-crosslinking of an electron irradiation carcass ply based on Mooney viscosity is characterized in that the method collects Mooney values of an electron irradiation side and a non-electron irradiation side through a Mooney viscosity tester, and judges that the carcass ply subjected to electron irradiation is successfully pre-crosslinked if the difference value of the Mooney values of the electron irradiation side and the non-electron irradiation side is 10-20; and if the difference value of the Mooney value is beyond the range of 10-20, regulating the work of the tire cord calendering site electron irradiation tube by outputting a numerical value.
6. The device is characterized by comprising a Mooney viscosity tester and a control system, wherein the control system collects data of the Mooney viscosity tester, and judges that the carcass ply subjected to the electron irradiation is successfully pre-crosslinked through a Mooney value difference between an electron irradiation side and a non-electron irradiation side being 10-20; and if the difference value of the Mooney value is beyond the range of 10-20, regulating the work of the tire cord calendering site electron irradiation tube by outputting a numerical 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 perform the method of: acquiring the Mooney values of the electron irradiation side and the non-electron irradiation side, and judging that the carcass ply is successfully pre-crosslinked after the electron irradiation by the difference value of the Mooney values of the electron irradiation side and the non-electron irradiation side being 10-20; and if the difference value of the Mooney value is beyond the range of 10-20, regulating the work of the tire cord calendering site electron irradiation tube by outputting a numerical value.
8. A computer readable storage medium having stored thereon a computer program or instructions, which when executed by a processor, performs the method of: acquiring the Mooney values of the electron irradiation side and the non-electron irradiation side, and judging that the carcass ply is successfully pre-crosslinked after the electron irradiation by the difference value of the Mooney values of the electron irradiation side and the non-electron irradiation side being 10-20; and if the difference value of the Mooney value is beyond the range of 10-20, regulating the work of the tire cord calendering site electron irradiation tube by outputting a numerical value.
9. A computer program product comprising a computer program or instructions which, when executed by a processor, performs the method of: acquiring the Mooney values of the electron irradiation side and the non-electron irradiation side, and judging that the carcass ply is successfully pre-crosslinked after the electron irradiation by the difference value of the Mooney values of the electron irradiation side and the non-electron irradiation side being 10-20; and if the difference value of the Mooney value is beyond the range of 10-20, regulating the work of the tire cord calendering site electron irradiation tube by outputting a numerical 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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| 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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| CN114813474B true CN114813474B (en) | 2023-08-08 |
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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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2022
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| JP2000094904A (en) * | 1998-09-25 | 2000-04-04 | Bridgestone Corp | Bias tire for heavy load and manufacture thereof |
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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 |
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| 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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