How to avoid the phenomenon of liquid silicone encapsulation and adhesive detachment during integrated molding?
To avoid the phenomenon of detachment of liquid silicone encapsulation during integrated molding, the following measures can be taken:
Choose the appropriate silicone material:
Select the appropriate type of silicone based on the application environment and the characteristics of the encapsulated material to ensure good adhesion and weather resistance of the silicone.
Surface treatment:
Clean and pre treat the surface of the encapsulated adhesive material, such as grinding, activation treatment, etc., to improve the surface roughness and activity, and enhance the adhesive strength.
Use adhesion promoter:
Add an appropriate amount of adhesion promoter to the silicone gel to enhance the adhesion between the silicone gel and the encapsulated material.
Control curing conditions:
Strictly control the curing temperature, time, and pressure to ensure that the silicone is fully cured and forms a strong adhesive layer.
Optimize the encapsulation process:
Ensure the uniformity and sufficient filling of silicone during the encapsulation process to avoid delamination caused by uneven encapsulation.
Control the encapsulation speed and pressure to avoid bubbles and delamination caused by too fast or excessive pressure.
Liquid silicone encapsulation integrated molding process
Use appropriate molds:
The mold design should be reasonable to ensure that the silicone can flow evenly during the encapsulation process, avoiding delamination caused by improper mold design.
Post processing:
After the encapsulation is completed, appropriate post-treatment can be carried out, such as heat treatment or mechanical treatment, to improve the bonding strength.
Quality monitoring:
Strict quality monitoring is carried out during the production process to ensure the quality of silicone raw materials, production processes, and normal operation of equipment.
Avoid chemical erosion:
Ensure that the encapsulated material and silicone avoid contact with chemical solvents or corrosive substances during storage and use to prevent damage to the adhesive layer.
Testing and Validation:
Conduct small-scale testing before production to verify the bonding performance between silicone and the encapsulated material, ensuring compliance with design requirements.
In summary, comprehensive measures such as raw material selection and processing, optimization of molding processes, working environment and operating techniques, as well as subsequent processing and maintenance, can effectively avoid the phenomenon of delamination in the integrated molding of liquid silicone rubber.
