What will happen if there is moisture in the injection tube of liquid silicone when pouring into the mold?

Jun 10, 2025 Leave a message

When liquid silicone is poured into the mold, if there is water in the injection tube, the following consequences may occur:

1. Affecting the curing quality of silicone

Incomplete curing: Water will interfere with the chemical reaction between silicone and curing agent, resulting in incomplete curing. Incompletely cured silicone products may have problems such as insufficient strength and poor elasticity, affecting the service life and performance of the product.

Extended curing time: The presence of water may slow down the curing speed of silicone, resulting in an extended production cycle and reduced production efficiency.

2. Leading to product surface defects

Bubbles or pores: Water may evaporate to form bubbles or pores during the curing process of silicone, resulting in an uneven surface of the product and affecting the appearance quality.

Atomization or whitening: Water reacts with certain components in silicone, which may cause atomization or whitening on the surface of the product, reducing the beauty of the product.

3. Affecting the physical properties of the product

Reduced strength: Incomplete curing and the presence of bubbles will reduce the strength of silicone products, making them more likely to break or damage.

Affecting elasticity: The elasticity of silicone is one of its important physical properties. The presence of water may affect the elasticity of silicone, causing it to lose its original flexibility and resilience during use.
4. Potential safety hazards
Release of harmful substances: If the silicone product is not completely cured due to moisture problems, harmful substances may be released during use, posing a potential threat to human health.
Affecting product stability: Incompletely cured silicone products may deform, age, and other problems during long-term use, affecting product stability and reliability.
5. Other problems in the production process
Equipment damage: Moisture may cause rust or corrosion of equipment such as injection tubes and molds, shortening the service life of the equipment.
Increase production costs: Due to problems such as incomplete curing and product surface defects, it may be necessary to increase costs such as rework and scrapping, resulting in an increase in overall production costs.
 

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