Peva rubber and plastic card codes are used in many industrial and daily application scenarios, and their chemical resistance is essential to ensure the stability and service life of the product in a specific environment.
First of all, preparation for chemical resistance testing is essential. It is necessary to clarify the purpose and scope of the test and determine which chemical contact environment will be simulated. For example, common acid and alkali solutions, organic solvents, etc., these are the types of chemicals that may be encountered in actual applications. At the same time, prepare suitable testing equipment, such as corrosion-resistant containers, precise measuring instruments, etc., to ensure the accuracy of the test.
During the test, the Peva rubber and plastic card code samples are immersed in chemical reagents of different concentrations and types. For acidic environments, solutions such as hydrochloric acid and sulfuric acid can be used; for alkaline environments, sodium hydroxide solutions can be used. The immersion time needs to be set according to actual use and industry standards, ranging from several hours to several days. During the immersion period, the appearance changes of the card code samples should be closely observed, such as whether the color changes, whether there is expansion, deformation, or cracks on the surface.
In addition to appearance observation, physical performance tests are also required. For example, the hardness, tensile strength, elongation at break and other indicators of the card code before and after immersion are measured. By comparing these data, the impact of chemicals on its internal structure and performance can be more accurately evaluated. If the hardness is significantly reduced or the tensile strength is greatly reduced, it means that the chemical may have eroded the molecular structure of the card code, resulting in poor mechanical properties.
For the analysis of chemical corrosion resistance, multiple factors should be considered comprehensively. On the one hand, the ratio of ethylene and vinyl acetate in the molecular structure of PEVA rubber and plastic will affect its corrosion resistance. A higher proportion of vinyl acetate may make it show better tolerance in certain polar solvents, but the opposite may be true in non-polar solvents. On the other hand, the type and amount of additives also play a key role. The addition of certain antioxidants and stabilizers can enhance the card code's resistance to chemicals.
In actual application scenarios, peva rubber and plastic card codes may be exposed to multiple chemicals at the same time, which requires testing and analysis of composite chemical environments. For example, in a chemical production workshop, the card code may be exposed to an environment with alternating acid and alkali and accompanied by the volatilization of organic solvents. In this case, it is necessary to study whether there is a synergistic or antagonistic effect between different chemicals, and whether the corrosion effect on the card code is enhanced or weakened.
In addition, the test results need to be compared with industry standards and actual use requirements. If the chemical corrosion resistance cannot meet the needs of a specific application, it is necessary to consider improving the material formulation, optimizing the production process, or taking additional protective measures, such as coating treatment, to improve the reliability and durability of the peva rubber and plastic card code in a chemically corrosive environment.
Through systematic chemical corrosion resistance testing and analysis, it can provide a strong basis for the reasonable application, material improvement and quality control of peva rubber and plastic card code, and ensure its effective use in various chemical environment-related fields.
