What are the density control methods for PEVA rubber and plastic card codes?
Publish Time: 2024-06-03
The density control methods of PEVA rubber and plastic card code mainly include the following:Raw material ratio adjustment:By adjusting the ratio of different components in PEVA rubber and plastic materials, the density of the final product can be effectively changed. Different raw material ratios will directly affect the molecular structure and physical properties of the material, and thus affect its density.Processing temperature and pressure control:In the processing of PEVA rubber and plastic card code, temperature and pressure are two important process parameters. By adjusting the processing temperature and pressure, the fluidity and formability of the material can be changed, thereby affecting the density of the product.For example, when the processing temperature gradually increases, the molecular weight of low-density polyethylene decreases and the density is also low. Increasing the pressure can reduce the molecular weight distribution range of the material, thereby achieving the purpose of density regulation.Additive use:Adding additives such as peroxides, two-dimensional and three-dimensional polymers can change the molecular structure and molecular weight of PEVA rubber and plastic materials, thereby affecting their density. These additives can react or interact with the molecules in the material, thereby changing the physical properties of the material.Filler addition:Adding lightweight fillers such as gas phase silica gel, foam plastics, vacuum glass microspheres, etc. can effectively reduce the density of PEVA rubber and plastic card code. These fillers usually have low density and specific physical properties, which can reduce the density of the material without changing its main properties.Surface treatment:The structure and morphology of PEVA rubber and plastic materials can be changed through surface treatment, and the density can also be regulated to a certain extent. However, this method is relatively less used in controlling the density of PEVA rubber and plastic card code, and the effect may not be as significant as other methods.Process parameter optimization:In addition to the above methods, the density of PEVA rubber and plastic card code can also be indirectly controlled by optimizing the preparation process. For example, changing process parameters such as compression time and compression multiple can affect the molding effect and density distribution of the material.In practical applications, it is necessary to select a suitable density control method based on the specific use and performance requirements of PEVA rubber and plastic card code. At the same time, it is also necessary to pay attention to the mutual influence and restriction relationship between various methods to ensure that the final product can meet the use requirements.
