Why the patterns are easy to crack when do silicone printing on the elastic webbing?
After the silicone prints the pattern on the elastic webbing, the pattern is easy to crack when pulling, which may be related to the following reasons:
1. Insufficient adhesion between silicone and webbing
Improper surface treatment: The surface of the elastic webbing may contain grease or impurities, which affects the adhesion of the silicone. Thorough cleaning and pretreatment are required before printing.
Silicone formula problem: The adhesion of silicone is insufficient. It is necessary to select silicone suitable for elastic materials, or adjust the formula to enhance adhesion.
2. Insufficient silicone curing
Insufficient curing time: The silicone is not completely cured, resulting in poor adhesion. It is necessary to ensure that the curing time and temperature meet the requirements.
Improper curing temperature: Too high or too low temperature will affect the curing effect, and it needs to be adjusted according to the characteristics of silicone.
3. Uneven silicone thickness
Uneven printing thickness: Too thick or too thin silicone layer will affect its elasticity and adhesion. The printing thickness needs to be controlled to ensure uniformity.
4. Elasticity of elastic webbing
Excessive webbing elasticity: High elastic webbing deforms greatly when pulled, which may cause silicone cracking. You need to choose the right type of silicone or adjust the elasticity of the webbing.
Webbing material problem: Some materials may have poor compatibility with silicone, and the adhesion of different materials needs to be tested.
5. Environmental factors
Humidity and temperature: Excessive humidity or low temperature may affect the curing and adhesion of silicone, and the printing environment needs to be controlled.
Solution
Surface treatment: Clean the webbing thoroughly before printing, and use a primer to enhance adhesion if necessary.
Silicone selection: Choose silicone with high elasticity and high adhesion, or adjust the formula.
Curing optimization: Ensure that the curing time and temperature are appropriate, and extend the curing time or increase the temperature if necessary.
Printing process: Control the thickness of silicone to ensure uniformity and avoid being too thick or too thin.
Material testing: Test different webbing materials and select materials that are compatible with silicone.
Environmental control: Maintain a suitable printing environment and avoid extreme humidity and temperature.
The above measures can effectively reduce the problem of silicone pattern cracking on elastic webbing.