What pretreatment work is required for the substrate before PVC glue coating to ensure the quality of the coating?
Release Time : 2025-04-02
Before PVC glue coating, proper pretreatment of the substrate is a key step to ensure the quality of the coating, improve the bonding strength and extend the service life. This process involves multiple links, and each step needs to be carefully operated to ensure that the final coating effect is optimal.
The moisture content of the base is a key factor. For cement base, its moisture content should be controlled below 4%, which can be detected by the plastic film method. For wooden base, the moisture content needs to be controlled within 10%. Too high moisture content will cause problems such as hollowing and falling off of the bonding layer, thereby affecting the bonding effect of PVC glue. Therefore, before applying PVC glue, the base must be fully dried.
The flatness of the base should not be ignored. To ensure that PVC glue can be evenly applied, the flatness error of the base should be controlled within a certain range, and it is usually recommended not to exceed 2mm/2m. This requirement can be achieved by leveling with self-leveling mortar. After leveling, the base layer should be free of defects such as hollows and cracks to ensure that the PVC glue fits tightly with the base layer.
Cleaning is another important part of pretreatment. Impurities such as dust and oil on the surface of the base layer will seriously affect the bonding effect of the PVC glue. Therefore, before coating, the base layer should be thoroughly cleaned with a vacuum cleaner and a mop, and the corners can be treated with a spatula. Ensuring that the surface of the base layer is clean and free of impurities will help improve the bonding strength and durability of the PVC glue.
In addition, for humid environments or base layers that are susceptible to moisture, it is also necessary to consider laying a moisture-proof film to prevent the influence of water vapor on the PVC glue. The selection of moisture-proof film should be based on the specific environment and use requirements to ensure that it can effectively isolate water vapor and improve the bonding stability of PVC glue.
Before applying PVC glue, applying an interface agent is also an effective pretreatment measure. The interface agent can enhance the bonding force between the base layer and the PVC glue and improve the bonding effect. When applying the interface agent, ensure that it is evenly applied without omissions. At the same time, after painting, you should wait for a while to allow the interface agent to fully penetrate the base layer and form a strong bonding layer.
In addition to the above pretreatment work, you should also pay attention to choosing the right PVC glue model. Different types of PVC glue have different performance characteristics and usage requirements. When choosing, you should make comprehensive considerations based on the specific application scenarios and usage environment to ensure that the selected glue can meet actual needs.
In summary, the substrate pretreatment work before PVC glue coating involves many aspects, including moisture content control, flatness leveling, cleaning, moisture-proof treatment, and brushing interface agent. These pretreatment measures can significantly improve the bonding strength and durability of PVC glue and ensure the best coating quality. Therefore, in actual operation, the pretreatment requirements should be strictly followed to ensure the effect and performance of the final coating.
The moisture content of the base is a key factor. For cement base, its moisture content should be controlled below 4%, which can be detected by the plastic film method. For wooden base, the moisture content needs to be controlled within 10%. Too high moisture content will cause problems such as hollowing and falling off of the bonding layer, thereby affecting the bonding effect of PVC glue. Therefore, before applying PVC glue, the base must be fully dried.
The flatness of the base should not be ignored. To ensure that PVC glue can be evenly applied, the flatness error of the base should be controlled within a certain range, and it is usually recommended not to exceed 2mm/2m. This requirement can be achieved by leveling with self-leveling mortar. After leveling, the base layer should be free of defects such as hollows and cracks to ensure that the PVC glue fits tightly with the base layer.
Cleaning is another important part of pretreatment. Impurities such as dust and oil on the surface of the base layer will seriously affect the bonding effect of the PVC glue. Therefore, before coating, the base layer should be thoroughly cleaned with a vacuum cleaner and a mop, and the corners can be treated with a spatula. Ensuring that the surface of the base layer is clean and free of impurities will help improve the bonding strength and durability of the PVC glue.
In addition, for humid environments or base layers that are susceptible to moisture, it is also necessary to consider laying a moisture-proof film to prevent the influence of water vapor on the PVC glue. The selection of moisture-proof film should be based on the specific environment and use requirements to ensure that it can effectively isolate water vapor and improve the bonding stability of PVC glue.
Before applying PVC glue, applying an interface agent is also an effective pretreatment measure. The interface agent can enhance the bonding force between the base layer and the PVC glue and improve the bonding effect. When applying the interface agent, ensure that it is evenly applied without omissions. At the same time, after painting, you should wait for a while to allow the interface agent to fully penetrate the base layer and form a strong bonding layer.
In addition to the above pretreatment work, you should also pay attention to choosing the right PVC glue model. Different types of PVC glue have different performance characteristics and usage requirements. When choosing, you should make comprehensive considerations based on the specific application scenarios and usage environment to ensure that the selected glue can meet actual needs.
In summary, the substrate pretreatment work before PVC glue coating involves many aspects, including moisture content control, flatness leveling, cleaning, moisture-proof treatment, and brushing interface agent. These pretreatment measures can significantly improve the bonding strength and durability of PVC glue and ensure the best coating quality. Therefore, in actual operation, the pretreatment requirements should be strictly followed to ensure the effect and performance of the final coating.
