Nowadays, people increasingly focus on food safety, which has also raised attention to food-related materials. Food-grade silicone is gradually replacing food-grade plastic, becoming a widely used material in the food industry. Silicone hoses offer advantages like high transparency, no odor, non-yellowing, and non-blooming. Notably, they solve common problems such as black hoses blooming or blue products fading. However, food-grade silicone tubes sometimes develop bubbles.
What Causes Bubbles in Food-Grade Silicone Hoses?
1. Raw Material Issues
One possible cause is impure white carbon black or mixing different types of white carbon black.
2. Coking Problems
Uneven mixing of the rubber compound.
Unreasonable filling capacity in the production process.
Poor control of debinding temperature and time.
Solutions
For Raw Material Issues
Select transparent white carbon black with higher purity.
Clean the kneader thoroughly before kneading the transparent rubber compound.
For Coking Process Issues
Strictly control kneading temperature and time.
Extend the original kneading time by 5–10 minutes and recheck the mixture.
Why Choose Food-Grade Silicone?
Food-grade silicone is a high-quality material known for its transparency and stability. It can withstand high temperatures up to 250℃ and maintains performance even when heated in a sealed environment. Additionally, it is soft, flexible, and offers stable performance, making it ideal for food industry applications.