A method, device and computer program product for quickly detecting the degree of electron irradiation of rubber material

Abstract

The present invention relates to the field of tire manufacturing technology, and in particular to a method, device and computer program product for quickly detecting the degree of electronic irradiation of rubber. A method for quickly detecting the degree of electronic irradiation of rubber, the method can quickly and accurately obtain the change of rubber performance before and after irradiation. At the same time, the method has good reproducibility, and the degree of radiation received by the rubber is well correlated with the change of the rubber obtained by detection (the correlation coefficient reaches 0.9 or above).

Description

Technical Field

[0001] The invention relates to the technical field of tire manufacturing, and in particular to a method, a device and a computer program product for quickly detecting the degree of electronic irradiation of rubber materials. Background Art

[0002] In our patent CN109291339A, the name is the method of changing the performance of rubber cord fabric by electron irradiation. It discloses adding an electron irradiation device to the production line of semi-steel radial tire fiber cord fabric, using electron rays accelerated in a high-voltage electric field to irradiate the fiber cord fabric, thereby inducing a chemical reaction to improve the performance of the fiber cord fabric and increase the stability and blocking force of the rubber cord fabric. Its first function is to stabilize the cord fabric coating rubber and make the cord arrangement more stable; second function is to prevent the airtight layer rubber (generally butyl rubber or halogenated butyl rubber) from penetrating into the tire body cord fabric rubber, as follows Figure 1 shown.

[0003] Obviously, the amount of electron irradiation will determine the stability and blocking force of the rubber cord. However, if the irradiation equipment fails, such as insufficient irradiation, it will affect the stability and airtightness of the tire, and ultimately affect the safety of the car. Therefore, it is the key to control the quality of electron irradiation to quickly and accurately analyze the performance changes of the rubber after irradiation and ensure the uniform stability of the rubber cord. In patent CN111707592A, although a method for measuring the permeability of rubber after electron irradiation of tire fiber cord is provided, the amount of rubber that penetrates into the cord is obtained by calculation, but it is impossible to directly obtain the performance changes of the rubber after irradiation and infer the amount of electron radiation. In patent CN111707481A, although a method for determining the stability of the cord arrangement of tire fiber cord after electron irradiation is provided, it is also impossible to directly obtain the performance changes of the rubber after irradiation and infer the amount of electron radiation. On the other hand, we compared the properties of the rubber before and after irradiation and found that there were no obvious changes in chemical swelling, rheology, etc. Therefore, the industry needs to develop a fast and accurate method to directly obtain the performance changes of the rubber before and after radiation. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a method for quickly detecting the degree of electronic irradiation of rubber, which can quickly and accurately obtain the change of rubber performance before and after irradiation. At the same time, the method has good reproducibility, and the degree of radiation received by the rubber is well correlated with the change of the rubber obtained by detection (the correlation coefficient reaches above 0.9).

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A method for quickly detecting the degree of electron irradiation of a rubber material, the method comprising the following steps:

[0007] 1) Take the rubber cord fabric before and after radiation, peel off the cord, and prepare for testing after it is produced on the open mill;

[0008] 2) Testing the implementation of strain scanning in rubber processing analysis instruments;

[0009] 3) Take the elastic modulus G' under different strains obtained by the rubber processing analysis instrument and calculate it according to the following formula:

[0010] Variation of rubber properties

[0011] 4) When 1.18≤M≤1.22, the rubber material has received the required amount of radiation; when M<1.18, the radiation amount is considered insufficient, and when M>1.22, the radiation amount is considered excessive.

[0012] Preferably, the test temperature of the rubber processing analysis instrument is set at 60-80°C, and the frequency is set at 10-30Hz; the range of strain scanning starts from a small strain of 0.28-1.20% and ends at a large strain of 42-100%.

[0013] Furthermore, the present invention also discloses the application of the method, which is used to quickly and accurately obtain the change of rubber material performance before and after radiation, to check whether the radiation amount received by the rubber cord is sufficient, and to judge whether the electronic radiation machine is abnormal. When M < 1.18, the radiation reserve may have a fault and need to be repaired, or the radiation amount needs to be adjusted; when M > 1.22, the rubber cord may be prematurely vulcanized inside, resulting in scrap.

[0014] Furthermore, the present invention also discloses a device for quickly detecting the degree of electronic irradiation of rubber materials, the device comprises a rubber processing analysis instrument and a computer device, the computer device is connected to the rubber processing analysis instrument, the computer device collects the elastic modulus G′ under different strains obtained by the rubber processing analysis instrument, and calculates according to the following formula:

[0015] Variation of rubber properties

[0016] When 1.18≤M≤1.22, the rubber material has received the required amount of radiation; when M<1.18, the radiation amount is considered insufficient, and when M>1.22, the radiation amount is considered excessive.

[0017] Furthermore, the present invention also discloses a computer device, comprising a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to collect the elastic modulus G′ under different strains obtained by the rubber processing analysis instrument, and calculates according to the following formula:

[0018] Variation of rubber properties

[0019] When 1.18≤M≤1.22, the rubber material has received the required amount of radiation; when M<1.18, the radiation amount is considered insufficient, and when M>1.22, the radiation amount is considered excessive.

[0020] Furthermore, the present invention also discloses a computer-readable storage medium having a computer program or instruction stored thereon, which, when executed by a processor, collects the elastic modulus G′ under different strains obtained by a rubber processing analysis instrument and calculates according to the following formula:

[0021] Variation of rubber properties

[0022] When 1.18≤M≤1.22, the rubber material has received the required amount of radiation; when M<1.18, the radiation amount is considered insufficient, and when M>1.22, the radiation amount is considered excessive.

[0023] Furthermore, the present invention also discloses a computer program product, including a computer program or an instruction, which, when executed by a processor, collects elastic modulus G′ under different strains obtained by a rubber processing analysis instrument and calculates according to the following formula:

[0024] Variation of rubber properties

[0025] When 1.18≤M≤1.22, the rubber material has received the required amount of radiation; when M<1.18, the radiation amount is considered insufficient, and when M>1.22, the radiation amount is considered excessive.

[0026] Due to the adoption of the above technical solution, the method can quickly and accurately obtain the change of rubber performance before and after radiation. At the same time, the method has good reproducibility, and the degree of radiation received by the rubber has a good correlation with the change of the rubber obtained by detection (the correlation coefficient reaches above 0.9). BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a before and after comparison chart of the properties of rubber-coated cord fabric changed by electron irradiation.

[0028] Figure 2 The results of RPA strain scan of the tire cord rubber before and after radiation.

[0029] Figure 3 This is the linear correlation diagram between M value and radiation amount. DETAILED DESCRIPTION

[0030] The specific implementation modes of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] (1) Take the rubber cord fabric before and after radiation, peel off the cord, take about 50% of rubber from each, and prepare the test after it is produced on the mixing mill.

[0032] (2) Testing A strain sweep was performed in a rubber processing analyzer (RPA). The test temperature was set at 60°C, the frequency was set at 20 Hz, and the strain sweep range was from a small strain of 0.28% to a large strain of 42%. Figure 2 The results of RPA strain scanning of the tire cord fabric rubber before and after radiation are shown in Figure 2. It can be found that after electron radiation, the modulus of the rubber at low strain decreases, while the modulus at high strain increases.

[0033] (3) Take the elastic modulus G′ obtained by RPA at different strains and calculate it according to the following formula:

[0034] Variation of rubber properties

[0035] (4) In order to verify the effect of the present invention, the irradiation amount of the electron irradiation equipment was adjusted to 0, 10KGY, 20KGY, 30KGY, 40KGY, and 50KGY. KGY is the radiation dose unit, which is defined as the energy absorbed by the unit mass of the irradiated material, and the unit is gray (GY). 1GY means that 1 kilogram of material absorbs 1 joule (J) of energy, and 1GY = 1J / Kg.

[0036] The M values ​​under different radiation intensities are shown in the following table. During normal radiation, the radiation dose is controlled at 40KGY, and the implementation is repeated 5 times as 5 embodiments. Comparative Examples 1 to 4 are the M values ​​calculated when the radiation dose is insufficient. Comparative Example 5 is the M value calculated when the radiation dose exceeds 40KGY.

[0037]

[0038] Figure 3 This is the linear correlation diagram between the M value and radiation in the above table, and the correlation coefficient is above 0.96.

[0039] The above is a description of the embodiments of the present invention. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in the field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown in this article, but will conform to the widest range consistent with the principles and novelties disclosed herein.

Claims

1. A method for quickly detecting the degree of electron irradiation of a rubber material, characterized in that: The method comprises the following steps: 1) Take the rubber cord fabric before and after radiation, peel off the cord, and prepare for testing after it is produced on the mixing mill; 2) The test implements strain scanning in the rubber processing analysis instrument; the test temperature of the rubber processing analysis instrument is set to 60-80°C, and the frequency is set to 10-30Hz; the range of strain scanning starts from a small strain of 0.28-1.20% and ends at a large strain of 42-100%; 3) Take the elastic modulus under different strains obtained by the rubber processing analysis instrument , calculated according to the following formula: 4) When 1.18 ≤ M ≤1.22, the rubber has received the required amount of radiation; when M<1.18, the radiation is considered insufficient, and when M>1.22, the radiation is considered excessive.

2. Application of the method described in claim 1, which is used to quickly and accurately obtain the changes in rubber properties before and after radiation, to check whether the amount of radiation received by the rubber cord is sufficient, and to determine whether there is any abnormality in the electronic radiation machine.

3. The use according to claim 2, characterized in that: When M < 1.18, the radiation reserve may be faulty and need to be repaired, or the radiation amount may need to be adjusted; when M > 1.22, the rubber cord fabric may be prematurely vulcanized inside, resulting in scrap.

4. A device for quickly detecting the degree of electronic irradiation of rubber, characterized in that: The equipment includes a rubber processing analysis instrument and a computer device. The computer device is connected to the rubber processing analysis instrument. The computer device collects elastic moduli under different strains obtained by the rubber processing analysis instrument. , calculated according to the following formula: When 1.18 ≤ M ≤1.22, the rubber material has received the required radiation; when M< 1.18, the radiation is considered insufficient, and when M>1.22, the radiation is considered excessive; The test temperature of the rubber processing analysis instrument is set to 60-80°C, and the frequency is set to 10-30Hz; the strain scanning range starts from a small strain of 0.28-1.20% and ends at a large strain of 42-100%.

5. A computer device comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to collect elastic moduli under different strains obtained by the rubber processing analysis instrument. , calculated according to the following formula: When 1.18 ≤ M ≤1.22, the rubber material has received the required radiation; when M< 1.18, the radiation is considered insufficient, and when M>1.22, the radiation is considered excessive; The test temperature of the rubber processing analysis instrument is set to 60-80°C, and the frequency is set to 10-30Hz; the strain scanning range starts from a small strain of 0.28-1.20% and ends at a large strain of 42-100%.

6. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: The computer program or instruction is executed by the processor to collect the elastic modulus under different strains obtained by the rubber processing analysis instrument. , calculated according to the following formula: When 1.18 ≤ M ≤1.22, the rubber material has received the required radiation; when M< 1.18, the radiation is considered insufficient, and when M>1.22, the radiation is considered excessive; The test temperature of the rubber processing analysis instrument is set to 60-80°C, and the frequency is set to 10-30Hz; the strain scanning range starts from a small strain of 0.28-1.20% and ends at a large strain of 42-100%.

7. A computer program product comprising a computer program or instructions, characterized in that The computer program or instruction is executed by the processor to collect the elastic modulus under different strains obtained by the rubber processing analysis instrument. , calculated according to the following formula: When 1.18 ≤ M ≤1.22, the rubber material has received the required radiation; when M< 1.18, the radiation is considered insufficient, and when M>1.22, the radiation is considered excessive; The test temperature of the rubber processing analysis instrument is set to 60-80°C, and the frequency is set to 10-30Hz; the strain scanning range starts from a small strain of 0.28-1.20% and ends at a large strain of 42-100%.

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