Sienox Centrifugal Defoaming Solution for Silicone Parts

Working Requirements: Thoroughly remove stubborn micro‑bubbles incorporated during compounding and preparation of silicone rubber materials (silicone products, medical‑grade silicone, electronic potting silicone, food‑grade silicone, industrial silicone, silicone molds, silicone tubes, etc.). Silicone rubber features high viscosity and high elasticity, so bubbles cannot escape naturally. After defoaming, the silicone shall have uniform and fine texture, smooth and bubble‑free surface after molding, and qualified physical properties, meeting high‑quality requirements for silicone products in medical, food, electronic and other industries.


Comparison Before and After Improvement

Before Improvement: Silicone product manufacturers commonly face the following pain points in production:

• Due to high viscosity and high elasticity of silicone rubber, micro‑bubbles generated during compounding are trapped inside the colloid. Traditional static defoaming takes hours or even several days with extremely low efficiency.

• Residual bubbles inside silicone products result in pinholes and uneven surfaces after molding, which seriously damage appearance quality and fail hygiene standards for medical‑grade and food‑grade products.

• Bubbles cause discontinuous internal structure of silicone products, reducing tensile strength, tear strength, resilience and other physical performances, and shortening service life.

• Residual bubbles in medical‑grade and food‑grade silicone products may trigger bacterial growth and substance precipitation, bringing potential safety risks.

• Bubbles in electronic potting silicone lead to incomplete sealing. Moisture ingress accelerates corrosion of electronic components and greatly reduces product reliability.

 

Solution: Based on actual demands from silicone product manufacturers, SIENOX provides Centrifugal Defoamer C012 and supporting solutions:

1. High‑speed centrifugal defoaming: Centrifugal Defoamer C012 quickly throws out stubborn micro‑bubbles from silicone rubber via high‑speed centrifugal force. Efficient separation between bubbles and colloid is realized within centrifugal force field, and the whole defoaming process is finished in several minutes.

2. High efficiency: Centrifugal defoaming is far more efficient than traditional static treatment, greatly shortening production cycle and improving productivity.

3. Enhanced surface quality: Fully defoamed silicone rubber delivers smooth and fine molded surface without pinholes or uneven defects for superior appearance.

4. Guaranteed physical performance: Defoamed silicone products feature dense and continuous internal structure with significantly improved tensile strength, tear strength, resilience and other physical indexes.

5. Precisely adjustable parameters: Rotation speed and processing time are adjustable to optimize process parameters for different silicone formulas and ensure batch‑to‑batch consistency.


Sample Provider: Well‑known domestic silicone product manufacturer

Silicone Rubber.jpg

Test Conditions

Item

Parameter

Test Model

Centrifugal Defoamer C012

Test Material

Silicone Rubber

Rotation Speed

1500 rpm

Test Time

3 min

Effect Comparison Before and After Defoaming

Comparison Item

Before Defoaming

After Defoaming

Bubble Content

Plenty of stubborn micro‑bubbles, uneven colloid

Bubbles mostly removed, dense and uniform texture

Molded Appearance

Surface pinholes and unevenness

Smooth and fine surface, free of bubble defects

Physical Performance

Decreased tensile strength and tear strength

Remarkably improved physical performance with excellent resilience

Medical & Food Safety

Bubbles may cause bacterial growth

No residual bubbles, compliant with hygiene‑safety standards

Electronic Potting Reliability

Incomplete sealing, easy moisture ingress

Complete sealing, greatly improved long‑term reliability

Production Efficiency

Static treatment for hours or even days

Completed within minutes, significant efficiency improvement

Silicone Rubber Before‑after Comparison.jpg

Proven Application Fields

• Medical‑grade silicone products (medical device accessories, medical catheters, silicone sealing parts)

• Food‑grade silicone products (food molds, silicone kitchenware, food delivery hoses)

• Electronic potting silicone (potting protection for power modules, sensors and control units)

• Silicone molds (craft molds, industrial forming molds, casting silicone)

• Silicone tubes (medical catheters, food delivery hoses, industrial hoses)

• Industrial silicone sealing parts (O‑rings, sealing gaskets, shock‑absorbing pads)