What is the difference between pet film coating process and other processes
DATE：2023/8/11 14:13:17 / READ： / SOURCE：This station
PET film (polyester film) is a commonly used plastic film material with excellent physical properties and chemical stability. In the production process of PET film, there are various processes to choose from, among which the coating process is a common production method. This article will introduce the differences between PET film coating process and other processes.
The coating process is a method of evenly coating liquid polymers onto substrates through molds or drums, and then curing them into thin films through processes such as drying and cooling. Compared to the coating process, other common PET film production processes include extrusion and stretching processes. The following will introduce the characteristics and differences of these processes separately.
1. Coating process:
The coating process is a method of evenly coating liquid polymers onto the substrate through a mold or drum, and then curing them into a thin film through processes such as drying and cooling. The characteristics of the film coating process are as follows:
-The production process is simple: the coating process is relatively simple, and the liquid polymer only needs to be evenly coated on the substrate during the production process, and then solidified into a thin film through processes such as drying and cooling.
-Low production efficiency: The production efficiency of the coating process is relatively low, the coating speed is slow, and it requires a longer time for drying and cooling processes, resulting in a longer production cycle.
-Good uniformity of film thickness: The coating process can achieve good uniformity of film thickness, and the thickness of the coated film is relatively stable.
2. Extrusion process:
The extrusion process is a method of extruding molten polymers into thin films through molds or extrusion heads through an extruder. The characteristics of the extrusion process are as follows:
-The production process is complex: The extrusion process is relatively complex, requiring the melted polymer to be evenly extruded through an extruder and formed through processes such as cooling and stretching.
-High production efficiency: The extrusion process has high production efficiency and fast extrusion speed, which can achieve large-scale production.
-Poor uniformity of film thickness: Due to the fluidity of the polymer during the extrusion process, the thickness uniformity of the extruded film is poor, with certain thickness differences.
3. Stretch process:
The stretching process is a method of heating pre prepared thin films at a certain temperature, and then forming them through stretching and cooling processes. The characteristics of the stretching process are as follows:
-The production process is relatively complex: the stretching process is relatively complex, requiring heating and stretching processes on pre prepared films to obtain the required film properties.
-Low production efficiency: The production efficiency of the stretching process is low, requiring multiple steps of processing, resulting in a longer production cycle.
-Good uniformity of film thickness: The stretching process can achieve good uniformity of film thickness, and through stretching and other processes, the thickness of the film can be made more uniform.
In summary, compared with other processes, the PET film adopts the coating process, which has the characteristics of relatively simple production process and better uniformity of film thickness. The extrusion process has the characteristics of high production efficiency and complex production process, while the stretching process has advantages in terms of film thickness uniformity. Choosing a suitable production process requires comprehensive consideration based on specific needs and requirements.
1. Coating process:
The coating process is a method of evenly coating liquid polymers onto the substrate through a mold or drum, and then curing them into a thin film through processes such as drying and cooling. The characteristics of the film coating process are as follows:
-The production process is simple: the coating process is relatively simple, and the liquid polymer only needs to be evenly coated on the substrate during the production process, and then solidified into a thin film through processes such as drying and cooling.
-Low production efficiency: The production efficiency of the coating process is relatively low, the coating speed is slow, and it requires a longer time for drying and cooling processes, resulting in a longer production cycle.
-Good uniformity of film thickness: The coating process can achieve good uniformity of film thickness, and the thickness of the coated film is relatively stable.
2. Extrusion process:
The extrusion process is a method of extruding molten polymers into thin films through molds or extrusion heads through an extruder. The characteristics of the extrusion process are as follows:
-The production process is complex: The extrusion process is relatively complex, requiring the melted polymer to be evenly extruded through an extruder and formed through processes such as cooling and stretching.
-High production efficiency: The extrusion process has high production efficiency and fast extrusion speed, which can achieve large-scale production.
-Poor uniformity of film thickness: Due to the fluidity of the polymer during the extrusion process, the thickness uniformity of the extruded film is poor, with certain thickness differences.
3. Stretch process:
The stretching process is a method of heating pre prepared thin films at a certain temperature, and then forming them through stretching and cooling processes. The characteristics of the stretching process are as follows:
-The production process is relatively complex: the stretching process is relatively complex, requiring heating and stretching processes on pre prepared films to obtain the required film properties.
-Low production efficiency: The production efficiency of the stretching process is low, requiring multiple steps of processing, resulting in a longer production cycle.
-Good uniformity of film thickness: The stretching process can achieve good uniformity of film thickness, and through stretching and other processes, the thickness of the film can be made more uniform.
In summary, compared with other processes, the PET film adopts the coating process, which has the characteristics of relatively simple production process and better uniformity of film thickness. The extrusion process has the characteristics of high production efficiency and complex production process, while the stretching process has advantages in terms of film thickness uniformity. Choosing a suitable production process requires comprehensive consideration based on specific needs and requirements.
Author：admin